Aegon (AEG) 20-F 23 Mar 18 2017 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2017shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	AEG
Entity Registrant Name	AEGON NV
Entity Central Index Key	769,218
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Common shares [member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	2,074,548,842
Common share B [member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	585,022,160

Consolidated income statement o

Consolidated income statement of Aegon N.V. - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Premium income	€ 22,826	€ 23,453	€ 22,925
Investment income	7,338	7,788	8,525
Fee and commission income	2,802	2,408	2,438
Other revenues	7	7	14
Total revenues	32,973	33,655	33,902
Income from reinsurance ceded	4,288	3,687	3,321
Results from financial transactions	20,250	15,753	521
Other income	540	66	83
Total income	58,052	53,162	37,827
Premiums paid to reinsurers	3,431	3,176	2,979
Policyholder claims and benefits	45,599	41,974	26,443
Profit sharing and rebates	23	49	31
Commissions and expenses	5,925	6,351	6,598
Impairment charges / (reversals)	42	95	1,251
Interest charges and related fees	435	347	412
Other charges	235	700	774
Total charges	55,689	52,693	38,489
Income before share in profit / (loss) of joint ventures, associates and tax	2,363	470	(661)
Share in profit / (loss) of joint ventures	161	137	142
Share in profit / (loss) of associates	11	3	5
Income / (loss) before tax	2,534	610	(514)
Income tax (expense) / benefit	(65)	(172)	83
Net income / (loss)	2,469	438	(431)
Net income / (loss) attributable to:
Owners of Aegon N.V.	€ 2,469	€ 437	(432)
Non-controllinginterests			€ 1
Earnings per share (EUR per share)
Basic earnings per common	€ 1.14	€ 0.15	€ (0.27)
Diluted earnings per common	€ 1.14	€ 0.15	€ (0.27)
Owners of Aegon N.V.	€ 2,469	€ 437	€ (432)
Common share B [member]
Earnings per share (EUR per share)
Basic earnings per common	€ 0.03		€ (0.01)
Diluted earnings per common	€ 0.03		€ (0.01)
Aegon N.V [member]
Investment income	€ 83	121
Total revenues	83	121
Results from financial transactions	56	(68)
Total income	139	53
Commissions and expenses	82	68
Interest charges and related fees	100	106
Total charges	182	174
Income / (loss) before tax	(43)	(121)
Income tax (expense) / benefit	1	25
Net income / (loss)	(42)	(96)	€ (38)
Net income / (loss) attributable to:
Owners of Aegon N.V.	2,469	437	(432)
Net income/(loss) group companies	2,511	533	(394)
Earnings per share (EUR per share)
Owners of Aegon N.V.	€ 2,469	€ 437	€ (432)

Consolidated statement of compr

Consolidated statement of comprehensive income of Aegon N.V. - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of comprehensive income [abstract]
Net income / (loss)	€ 2,469	€ 438	€ (431)
Items that will not be reclassified to profit or loss:
Changes in revaluation reserve real estate held for own use	8	8	13
Remeasurements of defined benefit plans	224	(392)	240
Income tax relating to items that will not be reclassified	(166)	86	(77)
Items that may be reclassified subsequently to profit or loss:
Gains / (losses) on revaluation of available-for-saleinvestments	1,283	854	(2,175)
(Gains) / losses transferred to income statement on disposal and impairment of available-for- sale investments	(1,330)	(2,122)	(485)
Changes in cash flow hedging reserve	(853)	(54)	446
Movement in foreign currency translation and net foreign investment hedging reserves	(2,149)	69	1,419
Equity movements of joint ventures	(15)	9	(8)
Equity movements of associates	(5)	3	(1)
Disposal of group assets	7		(544)
Income tax relating to items that may be reclassified	951	225	783
Other	9	12	9
Total other comprehensive income / (loss)	(2,038)	(1,301)	(380)
Total comprehensive income / (loss)	431	(863)	(811)
Total comprehensive income/ (loss) attributable to:
Owners of Aegon N.V.	435	(878)	(811)
Non-controllinginterests	(3)	15
Total comprehensive income / (loss)	€ 431	€ (863)	€ (811)

Consolidated statement of finan

Consolidated statement of financial position of Aegon N.V. - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	€ 10,768	€ 11,347
Assets held for sale	5,249	8,705
Investments	136,804	156,303
Investments for account of policyholders	194,063	203,610
Derivatives	5,912	8,318
Investments in joint ventures	1,712	1,614
Investments in associates	308	270
Reinsurance assets	19,202	11,208
Defined benefit assets	55	51
Deferred tax assets	79	87
Deferred expenses	10,135	11,423
Other assets and receivables	10,002	10,667
Intangible assets	1,633	1,820
Assets	395,923	425,425
Financial fixed assets
Cash and cash equivalents	10,768	11,347
Assets	395,923	425,425
Equity and liabilities
Shareholders' Equity	20,288	20,520
Other equity instruments	3,794	3,797
Issued capital and reserves attributable to owners of Aegon N.V.	24,082	24,318
Non-controllinginterests	20	23
Group equity	24,102	24,341
Subordinated borrowings	764	767
Trust pass-through securities	133	156
Insurance contracts	110,818	119,569
Insurance contracts for account of policyholders	122,168	120,929
Investment contracts	16,943	19,572
Investment contracts for account of policyholders	74,434	84,774
Derivatives	7,130	8,878
Borrowings	13,635	13,153
Provisions	210	173
Defined benefit liabilities	4,005	4,817
Deferred gains	13	64
Deferred tax liabilities	1,029	2,201
Liabilities held for sale	5,003	8,816
Other liabilities	15,208	16,978
Accruals	329	237
Total liabilities	371,821	401,084
Total equity and liabilities	395,923	425,425
Shareholders' equity
Share capital	322	319
Revaluation account	4,920	5,381
Remeasurement of defined benefit plans of group companies	(1,669)	(1,820)
Group equity	24,102	24,341
Other equity instruments	3,794	3,797
Subordinated borrowings	764	767
Long-term borrowings	11,943	11,251
Deferred tax liability	1,029	2,201
Other	15,208	16,978
Total liabilities	371,821	401,084
Total equity and liabilities	395,923	425,425
Aegon N.V [member]
Assets
Cash and cash equivalents	1,068	879
Assets	27,139	27,675
Financial fixed assets
Shares in group companies	23,117	22,219
Loans to group companies	2,690	4,123
Investments, Total	25,807	26,342
Receivables from group companies	36	80
Other receivables	146	219
Other	74	140
Accrued interest and rent	8	15
Receivables	264	454
Cash and cash equivalents	1,068	879
Assets	27,139	27,675
Equity and liabilities
Other equity instruments	3,794	3,797
Group equity	20,288	20,520
Subordinated borrowings	764	767
Deferred tax liabilities	89	159
Other liabilities	125	242
Total liabilities	3,059	3,359
Total equity and liabilities	27,139	27,675
Shareholders' equity
Share capital	322	319
Paid-in surplus	7,731	7,873
Revaluation account	5,017	5,450
Remeasurement of defined benefit plans of group companies	(1,669)	(1,820)
Legal reserves - foreign currency translation reserve	(401)	1,316
Legal reserves in respect of group companies	1,122	1,169
Retained earnings, including treasury shares	5,696	5,776
Net income / (loss)	2,469	437
Group equity	20,288	20,520
Other equity instruments	3,794	3,797
Total equity	24,082	24,318
Subordinated borrowings	764	767
Long-term borrowings	1,801	1,832
Non-current liabilities	2,565	2,599
Short term deposits	73	128
Loans from group companies	62	62
Payables to group companies	123	140
Deferred tax liability	89	159
Other	125	242
Accruals and deferred income	22	29
Current liabilities	494	760
Total liabilities	3,059	3,359
Total equity and liabilities	€ 27,139	€ 27,675

Consolidated statement of chang

Consolidated statement of changes in equity of Aegon N.V. - EUR (€) € in Millions	Total	Share capital [member]	Retained earnings [member]	Revaluation account [member]	Remeasurement of defined benefit Plans of group companies [member]	Other reserves [member]	Other equity instruments [member]	Issued capital and reserves [member]	[1]	Non-controlling interests [member]
Beginning balance at Dec. 31, 2014	€ 27,683	€ 8,597	€ 8,639	€ 8,308	€ (1,611)	€ (86)	€ 3,827	€ 27,674		€ 9
Net income / (loss)	(431)		(432)					(432)		1
Items that will not be reclassified to profit or loss:
Changes in revaluation reserve real estate held for own use	13			13				13
Remeasurements of defined benefit plans	240				240			240
Income tax relating to items that will not be reclassified	(77)			(2)	(75)			(77)
Items that may be reclassified subsequently to profit or loss:
Gains / (losses) on revaluation of available- for-sale investments	(2,175)			(2,175)				(2,175)
(Gains) / losses transferred to income statement on disposal and impairment of available-for-saleinvestments	(485)			(485)				(485)
Changes in cash flow hedging reserve	446			446				446
Movements in foreign currency translation and net foreign investment hedging reserves	1,419				(86)	1,505		1,419
Equity movements of joint ventures	(8)					(8)		(8)
Equity movements of associates	(1)					(1)		(1)
Disposal of group assets	(544)			(468)		(76)		(544)
Income tax relating to items that may be reclassified	783			836		(52)		783
Other	9		10					10		(1)
Total other comprehensive income / (loss)	(380)		10	(1,837)	79	1,369		(379)		(1)
Total comprehensive income / (loss)	(811)		(422)	(1,837)	79	1,369		(811)
Shares issued	1	1						1
Issuance and purchase of treasury shares	52		52					52
Dividends paid on common shares	(503)	(211)	(292)					(503)
Dividend withholding tax reduction	1		1					1
Coupons on perpetual securities	(111)		(111)					(111)
Coupons on non-cumulative subordinated notes	(28)		(28)					(28)
Incentive plans	(33)		(7)				(27)	(33)
Ending balance at Dec. 31, 2015	26,250	8,387	7,832	6,471	(1,532)	1,283	3,800	26,241		9
Net income / (loss)	438		437					437
Items that will not be reclassified to profit or loss:
Changes in revaluation reserve real estate held for own use	8			8				8
Remeasurements of defined benefit plans	(392)				(392)			(392)
Income tax relating to items that will not be reclassified	86			(3)	89			86
Items that may be reclassified subsequently to profit or loss:
Gains / (losses) on revaluation of available- for-sale investments	854			854				854
(Gains) / losses transferred to income statement on disposal and impairment of available-for-saleinvestments	(2,122)			(2,122)				(2,122)
Changes in cash flow hedging reserve	(54)			(54)				(54)
Movements in foreign currency translation and net foreign investment hedging reserves	69			(38)	16	91		69
Equity movements of joint ventures	9					9		9
Equity movements of associates	3					3		3
Income tax relating to items that may be reclassified	225			264		(39)		225
Other	12		(2)					(2)		14
Total other comprehensive income / (loss)	(1,301)		(2)	(1,090)	(288)	64		(1,315)		14
Total comprehensive income / (loss)	(863)		435	(1,090)	(288)	64		(878)		15
Shares issued	1	1						1
Shares withdrawn	(382)	(10)	(372)					(382)
Issuance and purchase of treasury shares	(27)		(27)					(27)
Dividends paid on common shares	(490)	(186)	(304)					(490)
Dividend withholding tax reduction	(2)		(2)					(2)
Coupons on perpetual securities	(105)		(105)					(105)
Coupons on non-cumulative subordinated notes	(28)		(28)					(28)
Incentive plans	(12)		(9)				(3)	(12)
Ending balance at Dec. 31, 2016	24,341	8,193	7,419	5,381	(1,820)	1,347	3,797	24,318		23
Net income / (loss)	2,469		2,469					2,469
Items that will not be reclassified to profit or loss:
Changes in revaluation reserve real estate held for own use	8			8				8
Remeasurements of defined benefit plans	224				224			224
Income tax relating to items that will not be reclassified	(166)			9	(175)			(166)
Items that may be reclassified subsequently to profit or loss:
Gains / (losses) on revaluation of available- for-sale investments	1,283			1,283				1,283
(Gains) / losses transferred to income statement on disposal and impairment of available-for-saleinvestments	(1,330)			(1,330)				(1,330)
Changes in cash flow hedging reserve	(853)			(853)				(853)
Movements in foreign currency translation and net foreign investment hedging reserves	(2,149)			(452)	102	(1,800)		(2,149)
Equity movements of joint ventures	(15)					(15)		(15)
Equity movements of associates	(5)					(5)		(5)
Disposal of group assets	7					7		7
Income tax relating to items that may be reclassified	951			874		76		951
Other	9		13					13		(3)
Total other comprehensive income / (loss)	(2,038)		13	(461)	151	(1,737)		(2,034)		(3)
Total comprehensive income / (loss)	431		2,482	(461)	151	(1,737)		435		(3)
Shares issued	3	3						3
Issuance and purchase of treasury shares	(105)		(105)					(105)
Dividends paid on common shares	(439)	(142)	(296)					(439)
Dividend withholding tax reduction	2		2					2
Coupons on perpetual securities	(103)		(103)					(103)
Coupons on non-cumulative subordinated notes	(28)		(28)					(28)
Incentive plans	(1)		4				(4)	(1)
Ending balance at Dec. 31, 2017	€ 24,102	€ 8,053	€ 9,374	€ 4,920	€ (1,669)	€ (390)	€ 3,794	€ 24,082		€ 20
[1]	Issued capital and reserves attributable to owners of Aegon N.V.

Consolidated cash flow statemen

Consolidated cash flow statement of Aegon N.V. - EUR (€) € in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of cash flows [abstract]
Income / (loss) before tax		€ 2,534	€ 610	€ (514)
Results from financial transactions		(23,445)	(16,294)	(896)
Amortization and depreciation		781	1,208	1,519
Impairment losses		84	88	1,261
Income from joint ventures		(161)	(137)	(142)
Income from associates		(11)	(3)	(5)
Release of cash flow hedging reserve		(739)	(59)	(39)
Other		(620)	577	476
Adjustments of non-cashitems		(24,112)	(14,621)	2,174
Insurance and investment liabilities		(613)	2,640	3,381
Insurance and investment liabilities for account of policyholders		12,988	10,716	(3,343)
Accrued expenses and other liabilities		309	2,610	(1,843)
Accrued income and prepayments		(1,797)	(2,812)	(1,387)
Changes in accruals		10,887	13,153	(3,192)
Purchase of investments (other than money market investments)		(32,057)	(34,873)	(38,290)
Purchase of derivatives		752	(831)	(1,003)
Disposal of investments (other than money market investments)		35,512	33,246	36,619
Disposal of derivatives		(878)	2,373	3,099
Net purchase of investments for account of policyholders		8,869	5,160	4,371
Net change in cash collateral		(455)	(1,347)	(2,569)
Net purchase of money market investments		(659)	532	648
Cash flow movements on operating items not reflected in income		11,082	4,260	2,875
Tax paid		173	(116)	(405)
Other		(12)	34	(23)
Net cash flows from operating activities		553	3,319	914
Purchase of individual intangible assets (other than VOBA and future servicing rights)		(34)	(22)	(52)
Purchase of equipment and real estate for own use		(72)	(69)	(90)
Acquisition of subsidiaries, net of cash		(52)	(2)	(66)
Acquisition joint ventures and associates		(121)	(112)	(173)
Disposal of intangible asset		1
Disposal of equipment		5	3	8
Disposal of subsidiaries and businesses, net of cash		(1,054)	(1,082)	542
Disposal joint ventures and associates		2	3	371
Dividend received from joint ventures and associates		129	203	76
Net cash flows from investing activities		(1,196)	(1,078)	615
Issuance of share capital				1
Issuance of treasury shares		2
Purchase of treasury shares		(266)	(623)	(213)
Proceeds from TRUPS, Subordinated borrowings and borrowings	[1]	9,170	3,711	1,821
Repayment of TRUPS, Subordinated borrowings and borrowings	[1]	(7,918)	(3,070)	(3,916)
Dividends paid		(294)	(306)	(292)
Coupons on perpetual securities		(138)	(140)	(148)
Coupons on non-cumulative subordinated notes		(37)	(38)	(38)
Net cash flows from financing activities		519	(465)	(2,785)
Net increase / (decrease) in cash and cash equivalents	[2]	(125)	1,776	(1,257)
Net cash and cash equivalents at the beginning of the year		11,346	9,593	10,649
Effects of changes in exchange rate		(196)	(23)	200
Net cash and cash equivalents at the end of the year		€ 11,026	€ 11,346	€ 9,593
[1]	Trust pass-through securities.
[2]	Included in net increase / (decrease) in cash and cash equivalents are interest received (2017: EUR 6,215 million, 2016: EUR 6,691 million and 2015: EUR 7,118 million) dividends received (2017: EUR 1,292 million, 2016: EUR 1,387 million and 2015: EUR 1,384 million) and interest paid (2017: EUR 311 million, 2016: EUR 300 million and 2015: EUR 350 million). All included in operating activities except for dividend received from joint ventures and associates (2017: EUR 129 million, 2016: EUR 203 million and 2015: EUR 76 million).

Consolidated cash flow stateme7

Consolidated cash flow statement of Aegon N.V. (Parenthetical) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of cash flows [abstract]
Interest received	€ 6,215	€ 6,691	€ 7,118
Dividends received	1,292	1,387	1,384
Interest paid	311	300	350
Dividend received from joint ventures and associates	€ 129	€ 203	€ 76

General information

General information	12 Months Ended
	Dec. 31, 2017
General information	1 General information Aegon N.V., incorporated and domiciled in the Netherlands, is a public limited liability company organized under Dutch law and recorded in the Commercial Register of The Hague registered under number 27076669 and with its registered address at Aegonplein 50, 2591 TV, The Hague, the Netherlands. Aegon N.V. serves as the holding company for The Aegon Group and has listings of its common shares in Amsterdam and New York. Aegon N.V. (or ‘the Company’) and its subsidiaries (‘Aegon’ or ‘the Group’) have life insurance and pensions operations in more than 20 countries in the Americas, Europe and Asia and are also active in savings and asset management operations, accident and health insurance, general insurance and to a limited extent banking operations. Headquarters are located in The Hague, the Netherlands. The Group employs over 28,000 people worldwide (2016: over 29,000).
Aegon N.V [member]
General information	1 General information Aegon N.V., incorporated and domiciled in the Netherlands, is a public limited liability company organized under Dutch law and recorded in the Commercial Register of The Hague registered under number 27076669 and with its registered address at Aegonplein 50, 2591 TV, The Hague, the Netherlands. Aegon N.V. serves as the holding company for the Aegon Group and has listings of its common shares in Amsterdam and New York. Aegon N.V. (or ‘the Company’) and its subsidiaries (‘Aegon’ or ‘the Group’) have life insurance and pensions operations in more than 20 countries in the Americas, Europe and Asia and are also active in savings and asset management operations, accident and health insurance, general insurance and to a limited extent banking operations. Headquarters are located in The Hague, the Netherlands. The Group employs over 28,000 people worldwide (2016: over 29,000). Aegon Funding Company LLC Aegon Funding Company LLC (AFC) is an indirect wholly owned subsidiary of Aegon that was established as a financing vehicle to raise funds for the US subsidiaries of Aegon. AFC has been fully consolidated in the financial statements of Aegon under IFRS. If AFC issues debt securities, Aegon will fully and unconditionally guarantee the due and punctual payment of the principal, any premium and any interest on those debts securities when and as these payments become due and payable, wheather at maturity, upon redemption or declaration of acceleration, or otherwise. The guarantees of senior debt securities will constitute an unsecured, unsubordinated obligation of Aegon and will rank equally with all other unsecured and unsubordinated obligations of Aegon. The guarantees of subordinated debt securities will constitute an unsecured obligation of Aegon and will be subordinated in right of payment to all senior indebtedness of Aegon.

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2017
Summary of significant accounting policies	2 Sum 2.1 Basis of presentation The consolidated financial statements have been prepared in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board (IFRS) and with Part 9 of Book 2 of the Netherlands Civil Code for purpose of reporting with the U.S. Securities and Exchange Commission (‘SEC’), including financial information contained in this Annual Report on Form 20-F. The consolidated financial statements have been prepared in accordance with the historical cost convention as modified by the revaluation of investment properties and those financial instruments (including derivatives) and financial liabilities that have been measured at fair value. Information on the standards and interpretations that were adopted in 2017 is provided below in note 2.1.1 Adoption of new IFRS accounting standards. The consolidated financial statements are presented in euro and all values are rounded to the nearest million unless otherwise stated. The consequence is that the rounded amounts may not add up to the rounded total in all cases. All ratios and variances are calculated using the underlying amount rather than the rounded amount. Certain amounts in prior years may have been reclassified to conform to the current year presentation. These reclassifications had no effect on net income, shareholders’ equity or earnings per share. The preparation of financial statements in conformity with IFRS requires management to make estimates and assumptions affecting the reported amounts of assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses for the reporting period. Those estimates are inherently subject to change and actual results could differ from those estimates. Included among the material (or potentially material) reported amounts and disclosures that require extensive use of estimates are: fair value of certain invested assets and derivatives, deferred policy acquisition costs, value of business acquired and other purchased intangible assets, goodwill, policyholder claims and benefits, insurance guarantees, pension plans, income taxes and the potential effects of resolving litigation matters. The consolidated financial statements of Aegon N.V. were approved by the Executive Board and by the Supervisory Board on March 22, 2018. The financial statements will be put for adoption to the Annual General Meeting of Shareholders on May 18, 2018. The shareholders’ meeting can decide not to adopt the financial statements but cannot amend them. Other then for SEC reporting, Aegon prepares its Annual Accounts under International Financial Reporting Standards as adopted by the European Union, including the decisions Aegon made with regard to the options available under International Financial Reporting Standards as adopted by the EU (IFRS-EU). IFRS-EU differs from IFRS in respect of certain paragraphs in IAS 39 ‘Financial Instruments: Recognition and Measurement’ regarding hedge accounting for portfolio hedges of interest rate risk (faitr value macro hedges) in accordance with the EU ‘carve out’version of IAS 39. Under IFRS, hedge accounting for fair value macro hedges cannot be applied to mortage loans and ineffectiveness arises whenever the revised estimate of the amount of cash flows in scheduled time buckets is either more or less than the original designated amount of that bucket. A reconciliation between IFRS and IFRS-EU is included in the table below. Shareholders’ equity Net income 2017 2016 2015 2017 2016 2015 In accordance with IFRS 20,288 20,520 22,441 2,469 438 (431 ) Adjustment of EU ‘IAS 39’ carve-out 368 510 315 (142 ) 195 (120 ) Tax effect of the adjustment (83 ) (117 ) (71 ) 34 (47 ) 27 Effect of the adjustment after tax 285 393 244 (108 ) 149 (92 ) In accordance with IFRS-EU 20,573 20,913 22,684 2,361 586 ` (523 ) 2.1.1 Adoption of new IFRS accounting standards New standards and amendments to standards become effective at the date specified by IFRS, but may allow companies to opt for an earlier adoption date. In 2017, the following amendments to existing standards issued by the IASB became mandatory, but are not currently relevant or do not significantly impact the financial position or financial statements: Accounting standard/ amendment/ interpretation IASB effective date Impact for Aegon IAS 7 Amendment Disclosure initiative January 1, 2017 Low IAS 12 Recognition of Deferred Tax Assets for Unrealised Losses January 1, 2017 Low Annual improvements 2014-2016 IFRS 12 Disclosure of interests in other entities January 1, 2017 Low 2.1.2 Future adoption of new IFRS accounting standards The following standards and amendments to existing standards, published prior to January 1, 2018, were not early adopted by the Group, but will be applied in future years: Accounting standard/ amendment/ interpretation IASB effective date Early adopted by Aegon Impact for Aegon IFRS 2 Clarifications of Classification an measurement of Share Based Payments Transactions January 1, 2018 No Low IFRS 9 Financial instruments, including the separate amendment applying IFRS 9 Financial instruments with IFRS 4 Insurance contracts January 1, 2018 (Aegon intends to make No See below for comments Amendment to IFRS 9 Financial instruments on prepayment features with negative compensation January 1, 2019 No See below for comments IFRS 15 Revenue from Contracts with Customers, including Clarifications to IFRS 15 as issued in 2016 January 1, 2018 No See below for comments IFRS 16 leases January 1, 2019 No See below for comments IFRS 17 Insurance contract January 1, 2021 No See below for comments IAS 40 Investment property, amendments regarding the transfer of property January 1, 2018 No Low IFRIC 22 Foreign currency transactions and advance consideration January 1, 2018 No Low IFRIC 23 Uncertainty over Tax Treatments January 1, 2019 No Low Annual improvements 2014-2016 IFRS 1, ‘First time adoption of IFRS’, regarding IFRS 7, IAS 19 and IFRS 10, IAS 28 Investments in associates and joint ventures January 1, 2018 No Low IFRS 9 Financial Instruments The IASB issued the complete version of IFRS 9 Financial Instruments in July 2014. IFRS 9 combines classification and measurement, the expected credit loss impairment model and hedge accounting. The standard will replace IAS 39 and all previous versions of IFRS 9. Under IFRS 9 Classification and Measurement, financial assets are measured at amortized cost, fair value through profit or loss or fair value through other comprehensive income, based on both the entity’s business model for managing the financial assets and the financial asset’s contractual cash flow characteristics. The classification and measurement of financial liabilities is unchanged from existing requirements apart from own credit risk. For financial liabilities that are designated at fair value through profit or loss, the changes which are attributable to the change in an entity’s own credit risk are presented in other comprehensive income, unless doing so would enlarge or create an accounting mismatch. For the impairment component, the IASB included requirements for a credit loss allowance or provision which should be based on expected losses rather than incurred losses. Application of IFRS 9 is required for annual periods beginning on or after January 1, 2018. However, on May 18, 2017, the IASB published the final version of the IFRS 17 Insurance Contracts standard. Prior to its finalization, the IASB issued an amendment to IFRS 4 Insurance Contracts (the predecessor standard to IFRS 17) that provides for a qualifying insurer a temporary exemption that permits, but does not require, the insurer to apply IAS 39 Financial Instruments: Recognition and Measurement rather than IFRS 9 for annual periods beginning before January 1, 2021 (i.e., a temporary exemption of IFRS 9). The objective of the amendment is to address the temporary accounting consequences of the different effective dates of IFRS 9 and IFRS 17. In order for an entity to be eligible for the temporary exemption it must have liabilities connected with insurance activities whose carrying value comprises either greater than 90% of the total carrying value of all liabilities or less than or equal to 90% but greater than 80%, and the insurer does not have significant activities unrelated to insurance. Aegon performed this analysis, and concluded that it meets the requirements for the temporary exception. As a result, Aegon will not implement IFRS 9 until January 1, 2021. As Aegon defers the application of IFRS 9 until 2021, the full impact of the standard is not yet clear, however an initial impact assessment resulted in the expectation that it will have a significant impact on shareholders’ equity, income and/or other comprehensive income and disclosures. An implementation project has started in 2017 and will be combined with the implementation of IFRS17 Insurance Contracts. IFRS 15 Revenue from Contracts with Customers In May 2014, the IASB issued IFRS 15 Revenue from Contracts with Customers. IFRS 15 will replace IAS 18 Revenue, as well as other interpretations issued by the IFRIC (International Financial Reporting Interpretations Committee) and SIC (Standing Interpretations Committee) regarding revenue unless the contracts are within the scope of other standards (for example, financial instruments, insurance contracts or lease contracts). The standard outlines the principles an entity shall apply to measure and recognize revenue and the related cash flows. The core principle is that an entity will recognize revenue at an amount that reflects the consideration to which the entity expects to be entitled in exchange for transferring goods or services to a customer. In April 2016, the IASB issued amendments to IFRS 15 to address several implementation issues discussed by the Transition Resource Group (TRG). The amendments are intended to clarify the requirements in IFRS 15, not to change the standard. IFRS 15 and the amendments is effective for the Group from January 1, 2018, using either of two methods: a full retrospective approach with certain practical expedients or a modified retrospective approach with the cumulative effect of initially applying this standard recognized at the date of initial application with certain additional disclosures. Aegon has evaluated the impact that adoption of this standard is expected to have on the Group’s financial statements and came to the conclusion that this impact will be very limited because insurance revenue is not in scope of IFRS 15 and because the other types of revenue are already materially compliant with this standard. Since IFRS 15 will have very limited impact on the Group’s financial statements, Aegon chose to apply the modified retrospective approach as transition method. IFRS 16 Leases IFRS 16 Leases which replaces IAS 17 has been issued by the IASB In January 2016. It will be mandatorily effective for annual reporting periods beginning on or after January 1, 2019. IFRS 16 introduces a single lessee accounting model and requires a lessee to recognize assets and liabilities for all leases with a term of more than 12 months, unless the underlying asset is of low value. A lessee is required to recognize a right-of-use asset representing its right to use the underlying leased asset and a lease liability representing its obligation to make lease payments. IFRS 16 substantially carries forward the lessor accounting requirements in IAS 17. Accordingly, a lessor continues to classify its leases as operating leases or finance leases, and to account for those two types of leases differently. Aegon is evaluating the impact that adoption of this Standard is expected to have on the Group’s financial statements. IFRS 17 Insurance Contracts The IASB issued IFRS 17 Insurance Contracts in May 2017. The Standard will replace IFRS 4, which was intended as an interim solution and allowed insurers to continue to use accounting principles that they had applied prior to the initial adoption of IFRS. IFRS 17 establishes principles for the recognition, measurement, presentation and disclosure of insurance contracts issued, reinsurance contracts held and investment contracts with discretionary participating features issued. The objective of the Standard is to ensure that entities provide relevant information in a way that faithfully represents those contracts. This information should provide users of financial statements with a basis to assess the effects that the contracts have on the financial position, financial performance and cash flows of the insurer. The Standard also specifies presentation and disclosure requirements to enhance comparability between insurance companies. IFRS 17 is effective for annual periods beginning on or after January 1, 2021. The Standard represents a fundamental change to current financial reporting and the implementation effort is expected to be significant. Early adoption of the standard is therefore not expected. An implementation project was started soon after the publication of the new Standard. Currently no choices have been made as to the accounting policy options provided in IFRS 17, however, it is expected that the impact of the initial application on Aegon’s financial statements is significant. 2.2 Basis of consolidation Subsidiaries The consolidated financial statements include the financial statements of Aegon N.V. and its subsidiaries. Subsidiaries (including consolidated structured entities) are entities over which Aegon has control. Aegon controls an entity when Aegon is exposed, or has rights, to variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. The assessment of control is based on the substance of the relationship between the Group and the entity and, among other things, considers existing and potential voting rights that are substantive. For a right to be substantive, the holder must have the practical ability to exercise that right. The subsidiary’s assets, liabilities and contingent liabilities are measured at fair value on the acquisition date and are subsequently accounted for in accordance with the Group’s accounting policies, which is consistent with IFRS. Intra-group transactions, including Aegon N.V. shares held by subsidiaries, which are recognized as treasury shares in equity, are eliminated. Intra-group losses may indicate an impairment that requires recognition in the consolidated financial statements. Non-controlling interests are initially stated at their share in the fair value of the net assets on the acquisition date and subsequently adjusted for the non-controlling share in changes in the subsidiary’s equity. The excess of the consideration paid to acquire the interest and the fair value of any interest already owned, over the Group’s share in the net fair value of assets, liabilities and contingent liabilities acquired is recognized as goodwill. Negative goodwill is recognized directly in the income statement. If the fair value of the assets, liabilities and contingent liabilities acquired in the business combination has been determined provisionally, adjustments to these values resulting from the emergence of new evidence within 12 months after the acquisition date are made against goodwill. Aegon recognized contingent considerations either as provision or as financial liability depending on the characteristics. Contingent considerations recognized as provisions are discounted and the unwinding is recognized in the income statement as an interest expense. Any changes in the estimated value of contingent consideration given in a business combination are recognized in the income statement. Contingent considerations recognized as financial liabilities are measured at fair value through profit or loss. The identifiable assets, liabilities and contingent liabilities are stated at fair value when control is obtained. Subsidiaries are deconsolidated when control ceases to exist. Any difference between the net proceeds plus the fair value of any retained interest and the carrying amount of the subsidiary including non-controlling interests is recognized in the income statement. Transactions with non-controlling interests Transactions with non-controlling interests are accounted for as transactions with owners. Therefore disposals to non-controlling interests and acquisitions from non-controlling interests, not resulting in losing or gaining control of the subsidiary are recorded in equity. Any difference between consideration paid or received and the proportionate share in net assets is accounted for in equity attributable to shareholders of Aegon N.V. Investment funds Investment funds managed by the Group in which the Group holds an interest are consolidated in the financial statements if the Group has power over that investment fund and it is exposed, or has rights, to variable returns from its involvement with the investee and has the ability to affect those returns through its power over the investee. In assessing control, all interests held by the Group in the fund are considered, regardless of whether the financial risk related to the investment is borne by the Group or by the policyholders (unless a direct link between the policyholder and the fund can be assumed). In determining whether Aegon has power over an investment fund all facts and circumstances are considered, including the following: ◆ Control structure of the asset manager (i.e. whether an Aegon subsidiary); ◆ The investment constraints posed by investment mandate; ◆ Legal rights held by the policyholder to the separate assets in the investment vehicle (e.g. policyholders could have the voting rights related to these investments); ◆ The governance structure, such as an independent board of directors, representing the policyholders, which has substantive rights (e.g. to elect or remove the asset manager); and ◆ Rights held by other parties (e.g. voting rights of policyholders that are substantive or not). Exposure or rights to variability of returns can be the result of, for example: ◆ General account investment of Aegon; ◆ Aegon’s investments held for policyholder; ◆ Guarantees provided by Aegon on return of policyholders in specific investment vehicles; ◆ Fees dependent on fund value (including, but not limited to, asset management fees); and ◆ Fees dependent on performance of the fund (including, but not limited to, performance fees). Investment funds where Aegon acts as an agent are not consolidated due to lack of control of the funds. In particular, for some separate accounts, the independent board of directors has substantive rights and therefore Aegon does not have power over these separate accounts but acts as an agent. For limited partnerships, the assessment takes into account Aegon’s legal position (i.e. limited partner or general partner) and any substantive removal rights held by other parties. Professional judgment is applied concerning the substantiveness of the removal rights and the magnitude of the exposure to variable returns, leading to the conclusion that Aegon controls some, but not all, of the limited partnerships in which it participates. Upon consolidation of an investment fund, a liability is recognized to the extent that the Group is legally obliged to buy back participations held by third parties. The liability is presented in the consolidated financial statements as investment contracts for account of policyholders. Where no repurchase obligation exists, the participations held by third parties are presented as non-controlling interests in equity. The assets allocated to participations held by third parties or by the Group on behalf of policyholders are presented in the consolidated financial statements as investments for account of policyholders. Equity instruments issued by the Group that are held by investment funds are eliminated on consolidation. However, the elimination is reflected in equity and not in the measurement of the related financial liabilities towards policyholders or other third parties. Structured entities A structured entity is defined in IFRS 12 as “An entity that has been designed so that voting rights are not the dominant factor in deciding who controls the entity, such as when any voting rights relate to administrative tasks only and the relevant activities are directed by means of contractual arrangements.” In these instances the tests and indicators to assess control provided by IFRS 10 have more focus on the purpose and design of the investee (with relation to the relevant activities that most significantly affect the structured entity) and the exposure to variable returns, which for structured entities lies in interests through e.g. derivatives, and will not be focused on entities that are controlled by voting rights. Structured entities that are consolidated include certain mortgage backed securitization deals, where Aegon was involved in the design of the structured entities and also has the ability to use its power to affect the amount of the investee’s returns. Other factors that contribute to the conclusion that consolidation of these entities is required includes consideration of whether Aegon fully services the investees and can therefore influence the defaults of the mortgage portfolios and the fact that in these cases the majority of risks are maintained by Aegon. Structured entities that are not consolidated include general account investments in non-affiliated structured entities that are used for investment purposes. Non-current assets held for sale and disposal groups Disposal groups are classified as held for sale if they are available for immediate sale in their present condition, subject only to the customary sales terms of such assets and disposal groups and their sale is considered highly probable. Management must be committed to the sale, which is expected to occur within one year from the date of classification as held for sale. Upon classification as held for sale, the carrying amount of the disposal group (or group of assets) is compared to their fair value less cost to sell. If the fair value less cost to sell is lower than the carrying value, this expected loss is recognized through a reduction of the carrying value of any goodwill related to the disposal group or the carrying value of certain other non-current, non-financial assets to the extent that the carrying value of those assets exceeds their fair value. Any excess of the expected loss over the reduction of the carrying amount of these relevant assets is not recognized upon classification as held for sale, but is recognized as part of the result on disposal if and when a divestment transaction occurs. Classification into or out of held for sale does not result in restating comparative amounts in the statement of financial position. 2.3 Foreign exchange translation a. Translation of foreign currency transactions The Group’s consolidated financial statements are presented in euros. Items included in the financial statements of individual group companies are recorded in their respective functional currency which is the currency of the primary economic environment in which each entity operates. Transactions in foreign currencies are initially recorded at the exchange rate prevailing at the date of the transaction. At the reporting date, monetary assets and monetary liabilities in foreign currencies are translated to the functional currency at the closing rate of exchange prevailing on that date, except for own equity instruments in foreign currencies which are translated using historical exchange rates. Non-monetary items carried at cost are translated using the exchange rate at the date of the transaction, while assets carried at fair value are translated at the exchange rate when the fair value was determined. Exchange differences on monetary items are recognized in the income statement when they arise, except when they are deferred in other comprehensive income as a result of a qualifying cash flow or net investment hedge. Exchange differences on non-monetary items carried at fair value are recognized in other comprehensive income or the income statement, consistently with other gains and losses on these items. b. Translation of foreign currency operations On consolidation, the financial statements of group entities with a foreign functional currency are translated to euro, the currency in which the consolidated financial statements are presented. Assets and liabilities are translated at the closing rates on the reporting date. Income, expenses and capital transactions (such as dividends) are translated at average exchange rates or at the prevailing rates on the transaction date, if more appropriate. Goodwill and fair value adjustments arising on the acquisition of a foreign entity are translated at the closing rates on the reporting date. The resulting exchange differences are recognized in the ‘foreign currency translation reserve’, which is part of shareholders’ equity. On disposal of a foreign entity the related cumulative exchange differences included in the reserve are recognized in the income statement. 2.4 Segment reporting Reporting segments and segment measures are explained and disclosed in note 5 Segment information. 2.5 Offsetting of assets and liabilities Financial assets and liabilities are offset in the statement of financial position when the Group has a legally enforceable right to offset and has the intention to settle the asset and liability on a net basis or simultaneously. The legally enforceable right must not be contingent on future events and must be enforceable in the normal course of business and in the event of default, insolvency or bankruptcy of the Company or the counterpart. 2.6 Intangible assets a. Goodwill Goodwill is recognized as an intangible asset for interests in subsidiaries and is measured as the positive difference between the acquisition cost and the Group’s interest in the net fair value of the entity’s identifiable assets, liabilities and contingent liabilities. Subsequently, goodwill is carried at cost less accumulated impairment charges. It is derecognized when the interest in the subsidiary is disposed. b. Value of business acquired When a portfolio of insurance contracts is acquired, whether directly from another insurance company or as part of a business combination, the difference between the fair value and the carrying amount of the insurance liabilities is recognized as value of business acquired (VOBA). The Group also recognizes VOBA when it acquires a portfolio of investment contracts with discretionary participation features. VOBA is amortized over the useful life of the acquired contracts, based on either the expected future premiums, revenues or the expected gross profit margins. The amortization period and pattern are reviewed at each reporting date; any change in estimates is recorded in the income statement. For all products, VOBA, in conjunction with deferred policy acquisition costs (DPAC) where appropriate, is assessed for recoverability using aggregation levels on a geographical jurisdiction basis or at the level of portfolio of contracts that are subject to broadly similar risks and managed together as a single portfolio. The portion determined not to be recoverable is charged to the income statement. VOBA is considered in the liability adequacy test for each reporting period, for more details refer to 2.19.f Liability adequacy testing. When unrealized gains or losses arise on available-for-sale assets backing the insurance liabilities, VOBA is adjusted to equal the effect that the realization of the gains or losses (through a sale or impairment) would have had on VOBA. The adjustment is recognized directly in shareholders’ equity. VOBA is derecognized when the related contracts are settled or disposed. c. Future servicing rights On the acquisition of a portfolio of investment contracts without discretionary participation features under which Aegon will render investment management services, the present value of future servicing rights is recognized as an intangible asset. Future servicing rights can also be recognized on the sale of a loan portfolio or the acquisition of insurance agency activities. The present value of the future servicing rights is amortized over the servicing period and is subject to impairment testing. It is derecognized when the related contracts are settled or disposed. Where applicable, Aegon recognizes other intangibles on the acquisition of a business combination such as those related to customer relationships. This can include customer contracts, distribution agreements and client portfolios. For these intangibles the present value of future cash flows are recognized and amortized in the period when future economic benefits arise from these intangibles. These intangible assets are also presented under future servicing rights. d. Software and other intangible assets Software and other intangible assets are recognized to the extent that the assets can be identified, are controlled by the Group, are expected to provide future economic benefits and can be measured reliably. The Group does not recognize internally generated intangible assets arising from research or internally generated goodwill, brands, customer lists and similar items. Software and other intangible assets are carried at cost less accumulated depreciation and impairment losses. Depreciation of the asset is over its useful life as the future economic benefits emerge and is recognized in the income statement as an expense. The depreciation period and pattern are reviewed at each reporting date, with any changes recognized in the income statement. An intangible asset is derecognized when it is disposed of or when no future economic benefits are expected from its use or disposal. 2.7 Investments General account investments comprise financial assets, excluding derivatives, as well as investments in real estate. a. Financial assets, excluding derivatives Financial assets are recognized on the trade date when the Group becomes a party to the contractual provisions of the instrument and are classified for accounting purposes depending on the characteristics of the instruments and the purpose for which they were purchased. Classification The following financial assets are measured at fair value through profit or loss: financial assets held for trading, financial assets managed on a fair value basis in accordance with the Group’s investment strategy and financial assets containing an embedded derivative that is not closely related and that cannot be reliably bifurcated. In addition, in certain instances the Group designates financial assets to this category when by doing so a potential accounting mismatch in the financial statements is eliminated or significantly reduced. Financial assets with fixed or determinable payments, that are not quoted in an active market and that the Group does not intend to sell in the near future are classified as loans. Those for which the holder may not recover substantially all of its initial investment, other than because of credit deterioration, are accounted for as available-for-sale. All remaining non-derivative financial assets are classified as available-for-sale. Measurement Financial assets are initially recognized at fair value excluding interest accrued to date plus, in the case of a financial asset not at fair value through profit or loss, any directly attributable incremental transaction costs. Loans and financial assets held-to-maturity are subsequently carried at amortized cost using the effective interest rate method. Financial assets at fair value through profit or loss are measured at fair value with all changes in fair value recognized in the income statement as incurred. Available-for-sale assets are recorded at fair value with unrealized changes in fair value recognized in other comprehensive income. Financial assets that are designated as hedged items are measured in accordance with the requirements for hedge accounting. Amortized cost The amortized cost of a debt instrument is the amount at which it is measured at initial recognition minus principal repayments, plus or minus the cumulative amortization of any difference between the initial amount and the maturity amount, and minus any reduction for impairment. The effective interest rate method is a method of calculating the amortized cost and of allocating the interest income or expense over the relevant period. The effective interest rate is the rate that exactly discou
Aegon N.V [member]
Summary of significant accounting policies	2 Summary of significant accounting policies The financial statements have been prepared in accordance with accounting principles in the Netherlands as embodied in Part 9 of Book 2 of the Netherlands Civil Code. In accordance with 2:362.8 of the Dutch Civil Code, the Company’s financial statements are prepared based on the accounting principles of recognition, measurement and determination of profit, as applied in the consolidated financial statements. These principles also include the classification and presentation of financial instruments, being equity instruments or financial liabilities. The group companies are stated at their net asset value, determined on the basis of the consolidated accounting policies as applied in the consolidated financial statements of the Group. For details on the accounting policies applied for the group companies refer to the consolidated financial statements. Revaluation account includes unrealized gains and losses on available-for-sales assets and the positive changes in value that have been recognized in net income/(loss) relating to investments (including real estate) and which do not have a frequent market listing. Legal reserves in respect of group companies include net increases in net asset value of subsidiaries and associates since their first inclusion, less any amounts that can be distributed without legal restrictions. A reference is made to Note 2 Summary of significant accounting policies of the consolidated financial statements for the description of the accounting policies applied.

Critical accounting estimates a

Critical accounting estimates and judgment in applying accounting policies	12 Months Ended
	Dec. 31, 2017
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Critical accounting estimates and judgment in applying accounting policies	3 Critical accounting estimates and judgment in applying accounting policies Application of the accounting policies in the preparation of the financial statements requires management to apply judgment involving assumptions and estimates concerning future results or other developments, including the likelihood, timing or amount of future transactions or events. Those estimates are inherently subject to change and actual results could differ from those estimates. Included among the material (or potentially material) reported amounts and disclosures that require extensive use of estimates are: fair value of certain invested assets and derivatives, deferred policy acquisition costs (please refer to paragraph 2.13), value of business acquired and other purchased intangible assets (please refer to paragraph 2.6), goodwill (please refer to paragraph 2.6), policyholder claims and benefits (please refer to paragraph 2.29), insurance guarantees (please refer to paragraph 2.19), pension plans (please refer to paragraph 2.22), income taxes (please refer to paragraph 2.24) and the potential effects of resolving litigation matters (please refer to paragraph 2.25). Accounting policies that are critical to the financial statement presentation and that require complex estimates or significant judgment are described in the following sections. Valuation of assets and liabilities arising from life insurance contracts The liability for life insurance contracts with guaranteed or fixed account terms is either based on current assumptions, on the assumptions established at inception of the contract, reflecting the best estimates at the time increased with a margin for adverse deviation or on the valuation assumptions (historical cost), without risk margin. All contracts are subject to liability adequacy testing which reflects management’s current estimates of future cash flows (including investment returns). To the extent that the liability is based on current assumptions, a change in assumptions will have an immediate impact on the income statement. Also, if a change in assumption results in not passing the liability adequacy test, the entire deficiency is recognized in the income statement. To the extent that the deficiency relates to unrealized gains and losses on available-for-sale investments, the additional liability is recognized in the revaluation reserve in shareholders’ equity. Some insurance contracts without a guaranteed or fixed contractual term contain guaranteed minimum benefits. Depending on the nature of the guarantee, it may either be bifurcated and presented as a derivative or be reflected in the value of the insurance liability in accordance with local accounting principles. Given the dynamic and complex nature of these guarantees, stochastic techniques under a variety of market return scenarios are often used for measurement purposes. Such models require management to make numerous estimates based on historical experience and market expectations. Changes in these estimates will immediately affect the income statement. In addition, certain acquisition costs related to the sale of new policies and the purchase of policies already in force are recorded as DPAC and VOBA assets respectively, and are amortized to the income statement over time. If the assumptions relating to the future profitability of these policies are not realized, the amortization of these costs could be accelerated and may require write-offs due to unrecoverability. Actuarial and economic assumptions The main assumptions used in measuring DPAC, VOBA and the liabilities for life insurance contracts with fixed or guaranteed terms relate to mortality, morbidity, investment return and future expenses. Depending on local accounting principles, surrender, lapse, and utilization rates may be considered. Mortality tables applied are generally developed based on a blend of company experience and industry wide studies, taking into consideration product characteristics, own risk selection criteria, target market and past experience. Mortality experience is monitored through regular studies, the results of which are fed into the pricing cycle for new products and reflected in the liability calculation when appropriate. For contracts insuring survivorship or mortality, allowance may be made for further longevity or mortality improvements. Morbidity assumptions are based on own claims severity and frequency experience, adjusted where appropriate for industry information. Investment assumptions are prescribed by the local regulator, market observable or based on management’s future expectations. In the latter case, the anticipated future investment returns are set by management on a countrywide basis, considering available market information and economic indicators. A significant assumption related to estimated gross profits on variable annuities and variable life insurance products in the United States and some of the smaller countries, is the annual long-term growth rate of the underlying assets. The reconsideration of this assumption may affect the original DPAC or VOBA amortization schedule, referred to as DPAC or VOBA unlocking. The difference between the original DPAC or VOBA amortization schedule and the revised schedule, which is based on actual and estimates of future gross profits, is recognized in the income statement as an expense or a benefit in the period of determination. Assumptions on future expenses are based on the current level of expenses, adjusted for expected expense inflation if appropriate. In Aegon the Netherlands, the expense basis makes an allowance for planned future cost savings, which are included in the liability adequacy test. Surrender and lapse rates depend on product features, policy duration and external circumstances such as the interest rate environment and competitor behavior. For policies with account value guarantees based on equity market movements, a dynamic lapse assumption is utilized to reflect policyholder behavior based on whether the guarantee is in the money. Own experience, as well as industry published data, are used in establishing assumptions. Lapse experience is correlated to mortality and morbidity levels, as higher or lower levels of surrenders may indicate future claims will be higher or lower than anticipated. Such correlations are accounted for in the mortality and morbidity assumptions based on the emerging analysis of experience. Actuarial assumption and model updates Assumptions are reviewed periodically, typically in the third quarter, based on historical experience, observable market data, including market transactions such as acquisitions and reinsurance transactions, anticipated trends and legislative changes. Similarly, the models and systems used for determining our liabilities are reviewed periodically and, if deemed necessary, updated based on emerging best practices and available technology. During 2017, Aegon implemented actuarial assumption and model updates resulting in a net EUR 276 million charge to income before tax (2016: EUR 118 million charge). Refer to note 5 Segment information for further details. For the years 2015 through 2017, Aegon kept its long-term equity market return assumption for the estimated gross profits on variable life and variable annuity products in the Americas at 8%. During the three year period, the long-term assumption for 10-year US Treasury yields was 4.25% and the uniform grading period was 10 years. The long term credit spread assumption on our most common corporate bonds is 114bps. The 90-day Treasury yield was 1.39%, 0.51% and 0.16% at December 31, 2017, 2016 and 2015, respectively. During 2016 and 2017 the 90-day Treasury yield was assumed to have a uniform grading over 10 years to 2.5%. In 2015, the 90-day Treasury yield was assumed to remain level for six months followed by a 9.5 year grade to 2.5%. On a quarterly basis, the estimated gross profits are updated for the difference between the estimated market return and the actual market return. Sensitivity on variable annuities and variable life insurance products in the United States A 1% decrease in the expected long-term equity growth rate with regard to Aegon’s variable annuities and variable life insurance products in the United States would result in a decrease in DPAC and VOBA balances and reserve strengthening of approximately EUR 130 million (2016: EUR 158 million). The DPAC and VOBA balances for these products in the United States amounted to EUR 2.7 billion at December 31, 2017 (2016: EUR 3.0 billion). A relative increase of 10% to the mortality assumption was used, dependent on product and characteristics of the block of business, would reduce net income by approximately EUR 265 million (2016: EUR 223 million). A relative 20% increase in the lapse rate assumption would increase net income by approximately EUR 78 million (2016: EUR 60 million). Any reasonably possible changes in the other assumptions Aegon uses to determine EGP margins (i.e. maintenance expenses, inflation and disability) would reduce net income by less than EUR 15 million (per assumption change) (2016: EUR 12 million). Determination of fair value and fair value hierarchy The following is a description of Aegon’s methods of determining fair value, and a quantification of its exposure to assets and liabilities measured at fair value. Fair value is defined as the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date under current market conditions (i.e. an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability). A fair value measurement assumes that the transaction to sell the asset or transfer the liability takes place either: ◆ In the principal market for the asset or liability; or ◆ In the absence of a principal market, in the most advantageous market for the asset or liability. Aegon uses the following hierarchy for measuring and disclosing of the fair value of assets and liabilities: ◆ Level I: quoted prices (unadjusted) in active markets for identical assets or liabilities that Aegon can access at the measurement date; ◆ Level II: inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly (that is, as prices) or indirectly (that is, derived from prices of identical or similar assets and liabilities) using valuation techniques for which all significant inputs are based on observable market data; and ◆ Level III: inputs for the asset or liability that are not based on observable market data (that is, unobservable inputs) using valuation techniques for which any significant input is not based on observable market data. The best evidence of fair value is a quoted price in an actively traded market. In the event that the market for a financial instrument is not active or quoted market prices are not available, a valuation technique is used. The degree of judgment used in measuring the fair value of assets and liabilities generally inversely correlates with the level of observable valuation inputs. Aegon maximizes the use of observable inputs and minimizes the use of unobservable valuation inputs when measuring fair value. Financial instruments, for example, with quoted prices in active markets generally have more pricing observability and therefore less judgment is used in measuring fair value. Conversely, financial instruments for which no quoted prices are available have less observability and are measured at fair value using valuation models or other pricing techniques that require more judgment. The assets and liabilities categorization within the fair value hierarchy is based on the lowest input that is significant to the fair value measurement. An active market is one in which transactions for the asset or liability take place with sufficient frequency and volume to provide pricing information on an ongoing basis. The judgment as to whether a market is active may include, although not necessarily determinative, lower transaction volumes, reduced transaction sizes and, in some cases, no observable trading activity for short periods. In inactive markets, assurance is obtained that the transaction price provides evidence of fair value or it is determined that adjustments to transaction prices are necessary to measure the fair value of the instrument. The majority of valuation techniques employ only observable market data, and so the reliability of the fair value measurement is high. However, certain assets and liabilities are valued on the basis of valuation techniques that feature one or more significant market inputs that are unobservable and, for such assets and liabilities, the derivation of fair value is more judgmental. An instrument is classified in its entirety as valued using significant unobservable inputs (Level III) if, in the opinion of management, a significant proportion of the instrument’s carrying amount is driven by unobservable inputs. ‘Unobservable’ in this context means that there is little or no current market data available from which to determine the price at which an at arm’s length transaction would be likely to occur. It generally does not mean that there is no market data available at all upon which to base a determination of fair value. Additional information is provided in the table headed ‘Effect of changes in significant unobservable assumptions to reasonably possible alternatives’ in note 47 Fair Value. While Aegon believes its valuation techniques are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain instruments (both financial and non-financial) could result in a different estimate of fair value at the reporting date. To operationalize Aegon’s fair value hierarchy, individual instruments (both financial and non-financial) are assigned a fair value level based primarily on the type of instrument and the source of the prices (e.g. index, third-party pricing service, broker, internally modeled). Periodically, this logic for assigning fair value levels is reviewed to determine if any modifications are necessary in the context of the current market environment.

Financial risks

Financial risks	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Financial risks	4 Financial risks General As an insurance group, Aegon is exposed to a variety of risks. Aegon’s largest exposures are to changes in financial markets (e.g. foreign currency, interest rate, credit and equity market risks) that affect the value of the investments, liabilities from products that Aegon sells, deferred expenses and value of business acquired. Other risks include insurance related risks, such as changes in mortality and morbidity, which are discussed in note 36 Insurance contracts. Aegon manages risk at local level where business is transacted, based on principles and policies established at the Group level. Aegon’s integrated approach to risk management involves similar measurement of risk and scope of risk coverage to allow for aggregation of the Group’s risk position. To manage its risk exposure, Aegon has risk policies in place. Many of these policies are group-wide while others are specific to the unique situation of local businesses. The Group level policies limit the Group’s exposure to major risks such as equity, interest rates, credit, and currency. The limits in these policies in aggregate remain within the Group’s overall tolerance for risk and the Group’s financial resources. Operating within this policy framework, Aegon employs risk management programs including asset liability management (ALM) processes and models and hedging programs (which are largely conducted via the use of financial derivative instruments). These risk management programs are in place in each country unit and are not only used to manage risk in each unit, but are also part of the Group’s overall risk strategy. Aegon operates a Derivative Use Policy to govern its usage of derivatives. This policy establishes the control, authorization, execution and monitoring requirements of the usage of such instruments. In addition, the policy stipulates necessary mitigation of credit risk created through derivatives management tools. For derivatives, counterparty credit risk is normally mitigated by requirements to post collateral via credit support annex agreements or through a central clearinghouse. As part of its risk management programs, Aegon takes inventory of its current risk position across risk categories. Aegon also measures the sensitivity of net income and shareholders’ equity under both deterministic and stochastic scenarios. Management uses the insight gained through these ‘what if?’ scenarios to manage the Group’s risk exposure and capital position. The models, scenarios and assumptions used are reviewed regularly and updated as necessary. Results of Aegon’s sensitivity analyses are presented throughout this section to show the estimated sensitivity of net income and shareholders’ equity to various scenarios. For each type of market risk, the analysis shows how net income and shareholders’ equity would have been affected by changes in the relevant risk variable that were reasonably possible at the reporting date. For each sensitivity test the impact of a reasonably possible change in a single factor is shown. Management action is taken into account to the extent that it is part of Aegon’s regular policies and procedures, such as established hedging programs. However, incidental management actions that would require a change in policies and procedures are not considered. Each sensitivity analysis reflects the extent to which the shock tested would affect management’s critical accounting estimates and judgment in applying Aegon’s accounting policies. Market-consistent assumptions underlying the measurement of non-listed assets and liabilities are adjusted to reflect the shock tested. The shock may also affect the measurement of assets and liabilities based on assumptions that are not observable in the market. For example, a shock in interest rates may lead to changes in the amortization schedule of DPAC or to increased impairment losses on equity investments. Although management’s short-term assumptions may change if there is a reasonably possible change in a risk factor, long-term assumptions will generally not be revised unless there is evidence that the movement is permanent. This fact is reflected in the sensitivity analyses. The accounting mismatch inherent in IFRS is also apparent in the reported sensitivities. A change in interest rates has an immediate impact on the carrying amount of assets measured at fair value. However, the shock will not have a similar effect on the carrying amount of the related insurance liabilities that are measured based on locked-in assumptions or on management’s long-term expectations. Consequently, the different measurement bases for assets and liabilities lead to increased volatility in IFRS net income and shareholders’ equity. Aegon has classified a significant part of its investment portfolio as ‘available-for-sale’, which is one of the main reasons why the economic shocks tested have a different impact on net income than on shareholders’ equity. Unrealized gains and losses on these assets are not recognized in the income statement but are booked directly to the revaluation reserves in shareholders’ equity, unless impaired. As a result, economic sensitivities predominantly impact shareholders’ equity but leave net income unaffected. The effect of movements of the revaluation reserve on capitalization ratios and capital adequacy are minimal. Aegon’s target ratio for the composition of its capital base is based on shareholders’ equity excluding the revaluation reserve. The sensitivities do not reflect what the net income for the period would have been if risk variables had been different because the analysis is based on the exposures in existence at the reporting date rather than on those that actually occurred during the year. Nor are the results of the sensitivities intended to be an accurate prediction of Aegon’s future shareholders’ equity or earnings. The analysis does not take into account the impact of future new business, which is an important component of Aegon’s future earnings. It also does not consider all methods available to management to respond to changes in the financial environment, such as changing investment portfolio allocations or adjusting premiums and crediting rates. Furthermore, the results of the analyses cannot be extrapolated for wider variations since effects do not tend to be linear. Concentration risk for financial risks are measured and managed at the following levels: ◆ Concentration per risk type: Risk exposures are measured per risk type as part of Aegon’s internal economic framework. A risk tolerance framework is in place which sets risk limits per risk type to target desired risk balance and promote diversification across risk types; ◆ Concentration per counterparty: Risk exposure is measured and risk limits are in place per counterparty as part of the Counterparty Name Limit Policy; and ◆ Concentration per sector, geography and asset class: Aegon’s investment strategy is translated in investment mandates for its internal and external asset managers. Through these investment mandates limits on sector, geography and asset class are set. Compliance monitoring of the investment mandates is done by the insurance operating companies. Moreover, concentration of financial risks are measured in Aegon business planning cycle. As part of business planning, the resilience of Aegon’s business strategy is tested in several extreme event scenarios. In the Adverse Financial scenario, financial markets are stressed without assuming diversification across different market factors. Within the projection certain management actions may be implemented when management deems this necessary. Currency exchange rate risk As an international group, Aegon is subject to foreign currency translation risk. Foreign currency exposure exists mainly when policies are denominated in currencies other than the issuer’s functional currency. Currency risk in the investment portfolios backing insurance and investment liabilities is managed using asset liability matching principles. Assets allocated to equity are kept in local currencies to the extent shareholders’ equity is required to satisfy regulatory and self-imposed capital requirements. Therefore, currency exchange rate fluctuations will affect the level of shareholders’ equity as a result of translation of subsidiaries into euro, the Group’s presentation currency. Aegon holds the remainder of its capital base (perpetual capital securities, subordinated and senior debt) in various currencies in amounts that are targeted to correspond to the book value of the country units. This balancing mitigates currency translation impacts on shareholders’ equity and leverage ratios. Aegon does not hedge the income streams from the main non-euro units and, as a result, earnings may fluctuate due to currency translation. As Aegon has significant business segments in the Americas and in the United Kingdom, the principal sources of exposure from currency fluctuations are from the differences between the US dollar and the euro and between the UK pound and the euro. Aegon may experience significant changes in net income and shareholders’ equity because of these fluctuations. Aegon operates a Currency Risk Policy which applies currency risk exposure limits both at Group and regional levels, and under which direct currency speculation or program trading by country units is not allowed unless explicit approval has been granted by the Group Risk and Capital Committee and the Management Board. Assets should be held in the functional currency of the business written or hedged back to that currency. Where this is not possible or practical, remaining currency exposure should be sufficiently documented and limits are placed on the total exposure at both group level and for individual country units. Information on Aegon’s three year historical net income/(loss) and shareholders’ equity in functional currency are shown in the table below: 2017 2016 2015 Net income Americas (in USD) 1,762 618 (261 ) The Netherlands (in EUR) 818 418 753 United Kingdom (in GBP) 71 (346 ) (674 ) Central & Eastern Europe (in EUR) 57 19 24 Spain & Portugal (in EUR) (2 ) (2 ) 22 Asia (in USD) 6 (14 ) (33 ) Asset Management (in EUR) 48 97 121 Equity in functional currency Americas (in USD) 17,712 17,103 17,609 The Netherlands (in EUR) 6,558 5,101 5,263 United Kingdom (in GBP) 1,905 1,845 2,981 Central & Eastern Europe (in EUR) 402 378 396 Spain & Portugal (in EUR) 433 451 464 Asia (in USD) 1,169 1,281 674 Asset Management (in EUR) 397 422 444 The exchange rates for US dollar and UK pound per euro for each of the last five year ends are set forth in the table below: Closing rates 2017 2016 2015 2014 2013 USD 1.20 1.05 1.09 1.21 1.38 GBP 0.89 0.85 0.74 0.78 0.83 Aegon Group companies’ foreign currency exposure from monetary assets and liabilities denominated in foreign currencies is not material. The sensitivity analysis in the following table shows an estimate of the effect of movements in the exchange rates of Aegon’s non-euro currencies relative to the euro on net income and shareholders’ equity. Sensitivity analysis of net income and shareholders’ equity to translation risk Movement of currency exchange rates 1) Estimated approximate effects on 2) Estimated approximate effects on 2017 Increase by 15% of USD currencies relative to the euro 260 2,159 Increase by 15% of GBP currencies relative to the euro 21 321 Increase by 15% of non-euro currencies relative to the euro 265 2,598 Decrease by 15% of USD currencies relative to the euro (189 ) (1,566 ) Decrease by 15% of GBP currencies relative to the euro (16 ) (216 ) Decrease by 15% of non-euro currencies relative to the euro (184 ) (1,868 ) 2016 Increase by 15% of USD currencies relative to the euro 87 2,179 Increase by 15% of GBP currencies relative to the euro (3 ) 259 Increase by 15% of non-euro currencies relative to the euro 79 2,537 Decrease by 15% of USD currencies relative to the euro (61 ) (1,558 ) Decrease by 15% of GBP currencies relative to the euro (55 ) (170 ) Decrease by 15% of non-euro currencies relative to the euro (110 ) (1,794 ) 1 The effect of currency exchange movements is reflected as a one-time shift up or down in the value of the non-euro currencies relative to the euro on December 31. 2 For the sensitivity analysis the book loss of the UK annuity portfolio in 2016 has been excluded. Interest rate risk Aegon bears interest rate risk with many of its products. In cases where cash flows are highly predictable, investing in assets that closely match the cash flow profile of the liabilities can offset this risk. For some Aegon country units, local capital markets are not well developed, which prevents the complete matching of assets and liabilities for those businesses. For some products, cash flows are less predictable as a result of policyholder actions that can be affected by the level of interest rates. In periods of rapidly increasing interest rates, policy loans, surrenders and withdrawals may increase. Premiums in flexible premium policies may decrease as policyholders seek investments with higher perceived returns. This activity may result in cash payments by Aegon requiring the sale of invested assets at a time when the prices of those assets are adversely affected by the increase in market interest rates; this may result in realized investment losses. These cash payments to policyholders result in a decrease in total invested assets and a decrease in net income. Among other things, early withdrawals may also require accelerated amortization of DPAC, which in turn reduces net income. During periods of sustained low interest rates, Aegon may not be able to preserve margins as a result of minimum interest rate guarantees and minimum guaranteed crediting rates provided on policies. Also, investment earnings may be lower because the interest earnings on new fixed-income investments are likely to have declined with the market interest rates. Mortgage loans and redeemable bonds in the investment portfolio are more likely to be repaid as borrowers seek to borrow at lower interest rates and Aegon may be required to reinvest the proceeds in securities bearing lower interest rates. Accordingly, net income declines as a result of a decrease in the spread between returns on the investment portfolio and the interest rates either credited to policyholders or assumed in reserves. Aegon manages interest rate risk closely, taking into account all of the complexity regarding policyholder behavior and management action. Aegon employs sophisticated interest rate measurement techniques and actively uses derivatives and other risk mitigation tools to closely manage its interest rate risk exposure. Aegon operates an Interest Rate Risk policy that limits the amount of interest rate risk to which the Group is exposed. All derivative use is governed by Aegon’s Derivative Use Policy. A detailed description on the use of derivatives within Aegon is included in note 25 Derivatives. The following table shows interest rates at the end of each of the last five years. 2017 2016 2015 2014 2013 3-month US LIBOR 1.69% 1.00% 0.61% 0.26% 0.25% 3-month EURIBOR (0.33% ) (0.32% ) (0.13% ) 0.08% 0.29% 10-year US Treasury 2.41% 2.43% 2.27% 2.17% 3.03% 10-year Dutch government 0.53% 0.35% 0.79% 0.68% 2.23% The sensitivity analysis in the table below shows an estimate of the effect of a parallel shift in the yield curves on net income and shareholders’ equity arising from the impact on general account investments and offset due to liabilities from insurance and investment contracts. In general, increases in interest rates are beneficial to Aegon. However, timing and valuation differences between assets and liabilities may cause short-term reductions in net income as rates rise. The rising interest rates would also cause the fair value of the available-for-sale bond portfolio to decline and the level of unrealized gains could become too low to support recoverability of the full deferred tax asset triggering an allowance charge to income. The offsetting economic gain on the insurance and investment contracts is however not fully reflected in the sensitivities because many of these liabilities are not measured at fair value. The short to medium term reduction in net income due to rising interest rates would be offset by higher net income in later years, all else being equal. Therefore, higher interest rates are not considered a long-term risk to the Group. However, a long sustained period of low interest rates will erode net income due to lower returns earned on reinvestments and due to lower long term returns from decreased overall portfolio yields. Parallel movement of yield curve Estimated approximate effects on Estimated approximate effects on 2017 Shift up 100 basis points (282 ) (2,620 ) Shift down 100 basis points 200 2,160 2016 Shift up 100 basis points 364 (2,257 ) Shift down 100 basis points (300 ) 2,020 The estimated effect on net income due to movements of the yield curve has increased compared to 2016 due to changes in the hedging strategy on guarantee provisions by Aegon the Netherlands. The hedge strategy targets minimal mismatch according to the Aegon economic framework which aligns with Solvency II Own Funds and stabilize Solvency II ratio volatility. The IFRS impact of the changed hedge strategy has led to increased sensitivity of net income. Credit risk As premiums and deposits are received, these funds are invested to pay for future policyholder obligations. For general account products, Aegon typically bears the risk for investment performance which is equal to the return of principal and interest. Aegon is exposed to credit risk on its general account fixed-income portfolio (debt securities, mortgages and private placements), over-the-counter derivatives and reinsurance contracts. Some issuers have defaulted on their financial obligations for various reasons, including bankruptcy, lack of liquidity, downturns in the economy, downturns in real estate values, operational failure and fraud. During financial downturns, Aegon can incur defaults or other reductions in the value of these securities and loans, which could have a materially adverse effect on Aegon’s business, results of operations and financial condition. Investments for account of policyholders are excluded as the policyholder bears the credit risk associated with the investments. The table that follows shows the Group’s maximum exposure to credit risk from investments in general account financial assets, as well as general account derivatives and reinsurance assets, collateral held and net exposure. Please refer to note 49 Transfer of financial assets for further information on collateral given, which may expose the Group to credit risk. 2017 Maximum Cash Secu- Letters of Real Master Other Total Surplus Net Debt securities - carried at fair value 84,344 - - 242 - - - 242 - 84,102 Debt securities - carried at amortized cost - - - 14 - - - 14 - (14 ) Money market and other short-term investments - carried at fair value 6,809 - 719 - - - - 719 25 6,115 Mortgage loans - carried at amortized cost 33,562 2,437 - 379 49,756 - - 52,573 19,271 260 Private loans - carried at amortized cost 3,642 79 - - - - - 79 - 3,563 Other loans - carried at amortized cost 2,164 - - - - - 1,886 1,886 1,195 1,473 Other financial assets - carried at fair value 2,586 - - - - - - - - 2,586 Derivatives 5,563 647 56 29 - 4,867 - 5,599 85 48 Reinsurance assets 19,200 - 4,395 137 - - - 4,532 - 14,667 At December 31 157,869 3,163 5,171 801 49,756 4,867 1,886 65,644 20,576 112,800 2016 Maximum Cash Securi- Letters of Real Master Other Total Surplus Net Debt securities - carried at fair value 103,169 - - 392 - - - 392 - 102,777 Money market and other short-term investments - carried at fair value 7,093 - 815 - - - - 815 27 6,306 Mortgage loans - carried at amortized cost 33,696 2,319 - 760 49,448 - - 52,527 19,198 366 Private loans - carried at amortized cost 3,166 67 - - - - - 67 - 3,099 Other loans - carried at amortized cost 2,441 - - - - - 2,197 2,197 1,326 1,570 Other financial assets - carried at fair value 3,425 - - - - - - - - 3,425 Derivatives 7,916 1,606 407 - - 5,841 - 7,855 47 109 Reinsurance assets 11,206 - 5,064 171 - - - 5,235 - 5,971 At December 31 172,113 3,992 6,287 1,322 49,448 5,841 2,197 69,087 20,598 123,623 Debt securities Several bonds in Aegon’s USA’s portfolio are guaranteed by monoline insurers. This is shown in the table above in the column ‘Letters of credit / guarantees’. Further information on the monoline insurers is provided below under ‘Monoline insurers’. Money market and short-term investments The collateral reported for the money market and short-term investments are related to tri-party repurchase agreements (repos). Within tri-party repos Aegon invests under short-term reverse repurchase agreements and the counterparty posts collateral to a third party custodian. The collateral posted is typically high-quality, short-term securities and is only accessible for or available to Aegon in the event the counterparty defaults. Mortgage loans The real estate collateral for mortgages includes both residential and commercial properties. The collateral for commercial mortgage loans in Aegon Americas is measured at fair value. At a minimum on an annual basis, a fair value is estimated for each individual real estate property that has been pledged as collateral. When a loan is originally provided, an external appraisal is obtained to estimate the value of the property. In subsequent years, the value is typically estimated internally using various professionally accepted valuation methodologies. Internal appraisals are performed by qualified, professionally accredited personnel. International valuation standards are used and the most significant assumptions made during the valuation of real estate are the current cost of reproducing or replacing the property, the value that the property’s net earning power will support, and the value indicated by recent sales of comparable properties. Valuations are primarily supported by market evidence. For Aegon the Netherlands, collateral for the residential mortgages is measured as the foreclosure value which is indexed periodically. Cash collateral for mortgage loans includes the savings that have been received to redeem the underlying mortgage loans at redemption date. These savings are part of the credit side of the statement of financial position, but reduce the credit risk for the mortgage loan as a whole. A substantial part of Aegon’s Dutch residential mortgage loan portfolio benefits from guarantees by a Dutch government-backed trust (Stichting Waarborgfonds Eigen Woning) through the Dutch Mortgage loan Guarantee program (NHG). With exception of NHG-backed mortgage loans originated after January 1, 2014, for which a 10% lender-incurred haircut applies on realized losses on each defaulted loan, these guarantees cover all principal losses, missed interest payments and foreclosure costs incurred upon termination and settlement of defaulted mortgage loans when lender-specific terms and conditions of the guarantee are met. When not fully met, the trust may pay claims in part or in full, depending on the severity of the breach of terms and conditions. For each specific loan, the guarantee amortizes in line with an equivalent annuity mortgage loan. When the remaining loan balance at default does not exceed the amortized guarantee, it covers the full loss under its terms and conditions. Any loan balance in excess of this decreasing guarantee profile serves as a first loss position for the lender. Derivatives The master netting agreements column in the table relates to derivative liability positions which are used in Aegon’s credit risk management. The offset in the master netting agreements column includes balances where there is a legally enforceable right of offset, but no intention to settle these balances on a net basis under normal circumstances. As a result, there is a net exposure for credit risk management purposes. However, as there is no intention to settle these balances on a net basis, they do not qualify for net presentation for accounting purposes. Reinsurance assets The collateral related to the reinsurance assets include assets in trust that are held by the reinsurer for the benefit of Aegon. The assets in trust can be accessed to pay policyholder benefits in the event the reinsurers fail to perform under the terms of their contract. Further information on the related reinsurance transactions is included in note 28 Reinsurance assets. Other loans The collateral included in the other column represents the policyholders account value for policy loans. The excess of the account value over the loan value is included in the surplus collateral column. For further information on the policy loans refer to note 23.1 Financial assets, excluding derivatives. The total collateral includes both under- and over-collateralized positions. To present a net exposure of credit risk, the over-collateralization, which is shown in the surplus collateral column, is extracted from the total collateral. Credit risk management Aegon manages credit risk exposure by individual counterparty, sector and asset class, including cash positions. Normally, Aegon mitigates credit risk in derivative contracts by entering into credit support agreement, where practical, and in ISDA master netting agreements for most of Aegon’s legal entities to facilitate Aegon’s right to offset credit risk exposure. Main counterparties to these transactions are investment banks which are typically rated ‘A’ or higher. The credit support agreement will normally dictate the threshold over which collateral needs to be pledged by Aegon or its counterparty. Transactions requiring Aegon or its counterparty to post collateral are typically the result of derivative trades, comprised mostly of interest rate swaps, equity swaps, currency swaps and credit swaps. Collateral received is mainly cash (USD and EUR). The credit support agreements that outline the acceptable collateral require high quality instruments to be posted. Over the last three years, there was no default with any derivatives counterparty. The credit risk associated with financial assets subject to a master netting agreement is eliminated only to the extent that financial liabilities due to the same counterparty will be settled after the assets are realized. Eligible derivative transactions are traded via Central Clearing Houses as required by EMIR and the Dodd-Frank act. Credit risk in these transactions is mitigated through posting of initial and variation margins. Aegon may also mitigate credit risk in reinsurance contracts by including downgrade clauses that allow the recapture of business, retaining ownership of assets required to support liabilities ceded or by requiring the reinsurer to hold assets in trust. For the resulting net credit risk exposure, Aegon employs deterministic and stochastic credit risk modeling in order to assess the Group’s credit risk profile, associated earnings and capital implications due to various credit loss scenarios. Aegon operates a Credit Name Limit Policy (CNLP) under which limits are placed on the aggregate exposure that it has to any one counterparty. Limits are placed on the exposure at both group level and individual country units. The limits also vary by a rating system, which is a composite of the main rating agencies (S&P, Moody’s and Fitch) and Aegon’s internal rating of the counterparty. If an exposure exceeds the stated limit, then the exposure must be reduced to the limit for the country unit and rating category as soon as possible. Exceptions to these limits can only be made after explicit approval from Aegon’s Group Risk and Capital Committee (GRCC). The policy is reviewed regularly. At December 31, 2017 there was no violations of the Credit Name Limit Policy at Group level. At December 31, 2016 there were two violations of the Credit Name Limit Policy at Group level. These violations have been resolved in 2017 by reducing the exposure of one and by approving an exemption for the other. At December 31, 2017 Aegon’s largest corporate credit exposures are to Wilton Re Holdings Ltd, American United Mutual Insurance, Barclays and Citigroup. Aegon had large government exposures, the largest being in the USA, the Netherlands and Germany. Highly rated government bonds and government exposure domestically issued and owned in local currency are excluded from the Credit Name Limit Policy. Aegon group level long-term counterparty exposure limits are as follows: Group limits per credit rating Amounts in EUR million 2017 2016 AAA 900 900 AA 900 900 A 675 675 BBB 450 450 BB 250 250 B 125 125 CCC or lower 50 50 Credit rating The ratings distribution of general account portfolios of Aegon’s major reporting units, excluding reinsurance assets, are presented in the table that follows, organized by rating category and split by assets that are valued at fair value and assets that are valued at amortized cost. Aegon uses a composite rating based on a combination of the external ratings of S&P, Moody’s, Fitch and National Association of Insurance Commissioners (NAIC which is for US only) and internal ratings. The rating used is the lower of the external rating and the internal rating. Americas The Netherlands United Kingdom Central & Eastern Europe Spain & Portugal Credit rating general account investments, excluding reinsurance assets 2017 Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value AAA 958 18,935 1,658 12,727 - 137 - 1 - 9 AA 2,693 3,353 85 5,449 - 1,139 - 5 - 48 A 2,905 18,684 56 3,186 - 449 8 126 55 167 BBB 330 16,822 941 1,267 - 78 3 495 (3 ) 401 BB 18 1,567 18 22 - 9 72 92 - 20 B - 1,162 - - - - 2 1 - - CCC or lower - 793 - 3 - - - - - - Assets not rated 1,892 2,797 27,133 3,770 - 219 107 55 2 6 Total 8,796 64,114 29,890 26,425 - 2,031 193 775 54 651 Past due and / or impaired assets 35 1,145 299 41 - - 82 1 - - At December 31 8,831 65,259 30,189 26,467 - 2,031 275 777 54 651 Asia Asset Management Total 2017 1) Credit rating general account investments, excluding reinsurance assets 2017 Amortized Fair value Amortized Fair value Amortized Fair value Total AAA - 985 - 144 2,616 32,960 35,575 AA - 340 - - 2,778 10,334 13,111 A - 1,775 - - 3,024 24,399 27,423 BBB - 1,920 - - 1,271 20,983 22,254 BB - 140 - 1 107 1,852 1,959 B - 117 - 4 2 1,284 1,287 CCC or lower - 23 - 4 - 823 823 Assets not rated 6 1 - 4 29,154 7,011 36,165 Total 6 5,300 - 157 38,951 99,645 138,597 Past due and / or impaired assets - 20 - - 416 1,207 1,624 At December 31 6 5,320 - 157 39,368 100,853 140,221 1 Includes investments of Holding and other activities. Americas The Netherlands United Kingdom Central & Eastern Europe Spain & Portugal Credit rating general account investments, excluding reinsurance assets 2016 Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value AAA 1,560 21,580 1,628 13,020 - 171 - 2 - 12 AA 3,214 6,102 86 6,011 - 1,158 - 1 - 58 A 3,281 25,147 12 3,397 - 549 8 116 48 157 BBB 481 21,461 850 2,402 - 85 20 433 (6 ) 436 BB 70 1,964 18 107 - 90 56 80 - 18 B - 1,207 - 10 - 2 4 1 - 3 CCC or lower - 1,049 - - - - - - - - Assets not rated 2,196 3,847 25,133 4,792 - 215 111 44 3 3 Total 10,802 82,357 27,727 29,740 - 2,269 201 676 45 687 Past due and / or impaired assets 17 1,397 390 77 - - 102 2 - - At December 31 10,820 83,755 28,117 29,817 - 2,269 303 678 45 687 Asia Asset Management Total 2016 1) Credit rating general account investments, excluding Amortized Fair value Amortized Fair value Amortized Fair value Total carrying AAA - 950 - - 3,189 35,758 38,946 AA - 402 - - 3,300 13,731 17,032 A - 1,823 - - 3,349 31,204 34,553 BBB - 1,904 - - 1,346 26,721 28,067 BB - 132 - - 145 2,391 2,536 B - 57 - - 5 1,279 1,284 CCC or lower - 28 - - - 1,078 1,078 Assets not rated 18 - - 90 27,460 9,267 36,727 Total 18 5,297 - 90 38,793 121,429 160,222 Past due and / or impaired assets - 13 - - 510 1,489 1,999 At December 31 18 5,310 - 90 39,303 122,918 162,221 1 Includes investments of Holding and other activities. The following table shows the credit quality of the gross positions in the statement of financial position for general account reinsurance assets specifically: Carrying value 2017 Carrying value 2016 AAA - 7 AA 13,379 7,724 A 5,242 3,120 Below A 24 18 Not rated 555 338 At December 31 19,200 11,206 Credit risk concentration The tables that follow present specific credit risk concentration information for general accou

Segment information

Segment information	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Segment information	5 Segment information Aegon’s operating segments are based on the businesses as presented in internal reports that are regularly reviewed by the Executive Board which is regarded as the chief operating decision maker. All reportable segments are involved in insurance or reinsurance business, asset management or services related to these activities. The reportable segments are: ◆ Americas: one operating segment which covers business units in the United States, Brazil and Mexico, including any of the units’ activities located outside these countries; ◆ the Netherlands; ◆ United Kingdom (including Variable Annuities Europe); ◆ Central & Eastern Europe; ◆ Spain & Portugal; ◆ Asia: one operating segment which covers businesses operating in Hong Kong, Singapore, China, Japan, India and Indonesia including any of the units’ activities located outside these countries; ◆ Asset Management: one operating segment which covers business activities from Aegon Asset Management; ◆ Holding and other activities: one operating segment which includes financing, reinsurance activities, employee and other administrative expenses of holding companies. Aegon’s segment information is prepared by consolidating on a proportionate basis Aegon’s joint ventures and associated companies. Performance Measure A non-IFRS performance measure of reporting segments utilized by the Company is underlying earnings before tax. Underlying earnings before tax reflects Aegon’s profit from underlying business operations and excludes components that relate to accounting mismatches that are dependent on market volatility, updates to best estimate actuarial and economic assumptions and model updates or events that are considered outside the normal course of business. Aegon believes that its performance measure underlying earnings before tax provides meaningful information about the underlying results of Aegon’s business, including insight into the financial measures that Aegon’s senior management uses in managing the business. Among other things, Aegon’s senior management is compensated based in part on Aegon’s results against targets using underlying earnings before tax. While many other insurers in Aegon’s peer group present substantially similar performance measures, the performance measures presented in this document may nevertheless differ from the performance measures presented by other insurers. There is no standardized meaning to these measures under IFRS or any other recognized set of accounting standards. The reconciliation from underlying earnings before tax to income before tax, being the most comparable IFRS measure, is presented in the tables in this note. The items that are excluded from underlying earnings before tax as described further below are: fair value items, realized gains or losses on investments, impairment charges/reversals, other income or charges, run-off businesses and share in earnings of joint ventures and associates. Impact from assumption and model updates In 2017 a charge of EUR 276 million (2016: EUR 118 million charge) has been recorded in other income/ (charges) in respect of assumption changes and model updates. The impact is mainly attributable to Aegon’s business in the Americas and the Netherlands. Assumption changes and model updates in the Americas led to a net negative impact of EUR 402 million and were mainly driven by a charge of EUR 303 million (USD 343 million) from the conversion of the largest block of universal life business to a new model. The model allows for modeling policyholder behavior and other assumptions on a policy by policy basis, whereas in the previous model this was done at a cohort level. A model change in fixed annuities discount rate, resulted in a charge of EUR 44 million (USD 50 million) and other assumption changes and model updates led to a charge of EUR 54 million (USD 61 million). In the Netherlands, assumption changes and model updates led to a gain of EUR 101 million, which mainly relates to the guarantee provision. During 2016 Aegon implemented actuarial assumption and model updates resulting in a net EUR 118 million charge (2015: EUR 131 million charge) to income before tax. Fair value items Fair value items include the over- or underperformance of investments and guarantees held at fair value for which the expected long-term return is included in underlying earnings before tax. In addition, hedge ineffectiveness on hedge transactions, fair value changes on economic hedges without natural offset in earnings and for which no hedge accounting is applied and fair value movements on real estate are included under fair value items. Certain assets held by Aegon are carried at fair value and managed on a total return basis, with no offsetting changes in the valuation of related liabilities. These include assets such as investments in hedge funds, private equities, real estate (limited partnerships), convertible bonds and structured products. Underlying earnings before tax exclude any over- or underperformance compared to management’s long-term expected return on assets. Based on current holdings and asset returns, the long-term expected return on an annual basis is 8-10%, depending on asset class, including cash income and market value changes. The expected earnings from these asset classes are net of deferred policy acquisition costs (DPAC) where applicable. In addition, certain products offered by Aegon Americas contain guarantees and are reported on a fair value basis and the total return annuities and guarantees on variable annuities. The earnings on these products are impacted by movements in equity markets and risk-free interest rates. Short-term developments in the financial markets may therefore cause volatility in earnings. Included in underlying earnings before tax is a long-term expected return on these products and excluded is any over- or underperformance compared to management’s expected return. The fair value movements of certain guarantees and the fair value change of derivatives that hedge certain risks on these guarantees of Aegon’s businesses in the Netherlands, VA Europe (included in United Kingdom) and Japan are excluded from underlying earnings before tax, and the long-term expected return for these guarantees is set at zero. In addition, fair value items include market related results on our loyalty bonus reserves in the United Kingdom. The value of these reserves are directly related to policyholder investments which value is directly impacted by movements in equity and bond markets. Holding and other activities include certain issued bonds that are held at fair value through profit or loss (FVTPL). The interest rate risk on these bonds is hedged using swaps. The fair value movement resulting from changes in Aegon’s credit spread used in the valuation of these bonds are excluded from underlying earnings before tax and reported under fair value items. Realized gains or losses on investments Includes realized gains and losses on available-for-sale investments, mortgage loans and other loan portfolios. Impairment charges/reversals Impairment charges include impairments on available-for-sale debt securities, shares including the effect of deferred policyholder acquisition costs, mortgage loans and other loan portfolios at amortized cost, joint ventures and associates. Impairment reversals include reversals on available-for-sale debt securities. Other income or charges Other income or charges includes the following: ◆ items which cannot be directly allocated to a specific line of business; ◆ the impact of assumption and model updates used to support calculations of our liabilities for insurance and investment contracts sold to policyholders and related assets; and ◆ items that are outside the normal course of business, including restructuring charges. In the Consolidated income statement, these restructuring charges are included in operating expenses. Actuarial assumption and model updates are recorded in ‘Policyholder claims and benefits’ in the Consolidated income statement. Run-off businesses Includes underlying results of business units where management has decided to exit the market and to run -off the existing block of business. This line includes results related to the run-off of the institutional spread-based business, structured settlements blocks of business, the life reinsurance business and the bank-owned and corporate-owned life insurance (BOLI/COLI) business in the United States. Aegon has other blocks of business for which sales have been discontinued and of which the earnings are included in underlying earnings before tax. Share in earnings of joint ventures and associates Earnings from Aegon’s joint ventures in the Netherlands, Mexico, Spain, Portugal, China and Japan and Aegon’s associates in India, Brazil, the Netherlands, United Kingdom, Mexico and France are reported on an underlying earnings before tax basis. The following table presents Aegon’s segment results. Income statement - Underlying earnings LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Underlying earnings before tax 1,381 520 116 67 4 49 136 (170 ) - 2,103 61 2,163 Fair value items 170 30 (82 ) - - - - 24 - 142 (97 ) 45 Realized gains / (losses) on investments 157 184 62 1 - 4 3 - - 413 (5 ) 408 Impairment charges (38 ) (27 ) - (2 ) - (1 ) - (3 ) - (71 ) - (71 ) Impairment reversals 22 10 - - - - - - - 32 - 32 Other income / (charges) (353 ) 296 40 - - (19 ) (49 ) 16 - (68 ) (4 ) (72 ) Run-off businesses 30 - - - - - - - - 30 - 30 Income / (loss) before tax 1,369 1,013 137 66 4 33 90 (134 ) - 2,579 (44 ) 2,534 Income tax (expense) / benefit 198 (196 ) (56 ) (9 ) (6 ) (28 ) (42 ) 29 - (110 ) 44 (65 ) Net income / (loss) 1,567 818 81 57 (2 ) 5 48 (105 ) - 2,469 - 2,469 Inter-segment underlying earnings (78 ) (111 ) (87 ) (11 ) (1 ) (1 ) 214 73 Revenues 2017 Life insurance gross premiums 7,437 1,857 9,603 411 208 983 - 7 (9 ) 20,498 (546 ) 19,952 Accident and health insurance 2,115 203 32 1 83 97 - - - 2,531 (20 ) 2,511 General insurance - 148 - 216 103 - - 1 (1 ) 466 (103 ) 363 Total gross premiums 9,553 2,208 9,635 628 394 1,080 - 8 (10 ) 23,496 (670 ) 22,826 Investment income 3,368 2,172 1,517 49 37 246 4 295 (291 ) 7,396 (58 ) 7,338 Fee and commission income 1,919 326 235 43 17 63 609 - (221 ) 2,991 (189 ) 2,802 Other revenues 5 - - - 3 1 - 4 - 13 (5 ) 7 Total revenues 14,844 4,706 11,387 720 450 1,390 613 308 (522 ) 33,895 (922 ) 32,973 Inter-segment revenues - (1 ) - - - 3 222 298 Income statement - Underlying earnings LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2016 Underlying earnings before tax 1,249 534 59 55 8 21 149 (162 ) - 1,913 48 1,960 Fair value items (521 ) (228 ) (7 ) - (1 ) (9 ) - (74 ) - (840 ) (72 ) (912 ) Realized gains / (losses) on investments (13 ) 189 153 - (1 ) 8 3 - - 340 (6 ) 334 Impairment charges (72 ) (29 ) - 1 - (1 ) (5 ) (7 ) 1 (113 ) - (112 ) Impairment reversals 42 17 - - - - - - (1 ) 58 - 58 Other income / (charges) (100 ) 44 (678 ) (23 ) - (5 ) (2 ) (6 ) - (771 ) - (771 ) Run-off businesses 54 - - - - - - - - 54 - 54 Income / (loss) before tax 638 526 (474 ) 34 6 14 145 (249 ) - 641 (31 ) 610 Income tax (expense) / benefit (80 ) (109 ) 18 (15 ) (8 ) (27 ) (48 ) 65 - (203 ) 31 (172 ) Net income / (loss) 559 418 (456 ) 19 (2 ) (13 ) 97 (183 ) - 438 - 438 Inter-segment underlying earnings (194 ) (95 ) (87 ) (14 ) (1 ) 74 234 84 Revenues 2016 Life insurance gross premiums 7,363 2,015 9,888 399 191 1,121 - 6 (84 ) 20,898 (498 ) 20,400 Accident and health insurance 2,204 210 36 1 73 104 - (4 ) - 2,624 (15 ) 2,609 General insurance - 266 - 179 92 - - 5 (5 ) 536 (92 ) 444 Total gross premiums 9,567 2,491 9,924 578 355 1,225 - 7 (89 ) 24,058 (606 ) 23,453 Investment income 3,717 2,135 1,661 45 45 232 3 406 (403 ) 7,841 (54 ) 7,788 Fee and commission income 1,651 350 95 36 14 61 632 - (242 ) 2,596 (188 ) 2,408 Other revenues 4 - - - 2 - 1 3 - 11 (4 ) 7 Total revenues 14,940 4,976 11,680 659 416 1,517 636 416 (734 ) 34,507 (852 ) 33,655 Inter-segment revenues - 3 - - - 79 243 409 Income statement - Underlying earnings LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2015 Underlying earnings before tax 1,278 537 (27 ) 37 12 20 170 (163 ) 2 1,867 34 1,901 Fair value items (691 ) 126 (25 ) - - 7 - (68 ) - (651 ) (59 ) (710 ) Realized gains / (losses) on investments (74 ) 306 103 2 - 7 3 - - 346 (8 ) 338 Impairment charges (43 ) (25 ) - (2 ) - - - - - (70 ) (21 ) (91 ) Impairment reversals 114 5 - - - - - - - 119 - 119 Other income / (charges) (913 ) 27 (1,247 ) (2 ) 17 (61 ) (1 ) - - (2,180 ) 21 (2,159 ) Run-off businesses 88 - - - - - - - - 88 - 88 Income / (loss) before tax (241 ) 977 (1,196 ) 35 29 (27 ) 172 (230 ) 2 (482 ) (33 ) (514 ) Income tax (expense) / benefit 6 (223 ) 268 (11 ) (7 ) (3 ) (50 ) 71 - 51 33 83 Net income / (loss) (235 ) 753 (928 ) 24 22 (30 ) 121 (159 ) 2 (431 ) - (431 ) Inter-segment underlying earnings (220 ) (55 ) (63 ) (14 ) - 77 264 10 Revenues 2015 Life insurance gross premiums 7,046 2,240 8,465 477 174 1,713 - 4 (106 ) 20,013 (431 ) 19,583 Accident and health insurance 2,266 234 47 1 64 105 - 6 (6 ) 2,717 (14 ) 2,703 General insurance - 473 - 164 80 - - 2 - 720 (80 ) 640 Total gross premiums 9,312 2,947 8,512 642 317 1,819 - 13 (112 ) 23,450 (524 ) 22,925 Investment income 3,680 2,277 2,331 45 41 194 7 392 (391 ) 8,576 (51 ) 8,525 Fee and commission income 1,704 351 98 39 13 62 650 - (284 ) 2,633 (195 ) 2,438 Other revenues 9 - - - 2 - - 7 - 19 (5 ) 14 Total revenues 14,705 5,575 10,941 726 373 2,076 657 412 (787 ) 34,677 (775 ) 33,902 Inter-segment revenues 24 2 - - - 101 261 399 The Group uses underlying earnings before tax in its segment reporting as an important indicator of its financial performance. The reconciliation of this measure to the income before tax is shown below. Aegon believes that underlying earnings before tax, together with the other information included in this report, provides a meaningful measure for the investing public to evaluate Aegon’s business relative to the businesses of its peers. The reconciliation from underlying earnings before tax to income before tax, being the most comparable IFRS measure, is presented in the table below. For those items that cannot be directly reconciled to the respective notes, the explanation is provided below the table. Note 2017 2016 2015 Underlying earnings before tax 2,103 1,913 1,867 Elimination of share in earnings of joint ventures and associates 61 48 34 Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives 10 (437 ) (783 ) (571 ) Realized gains and losses on financial investments 10 431 327 349 Gains and (losses) on investments in real estate 10 193 70 145 Net fair value change of derivatives 10 (134 ) (277 ) (29 ) Net foreign currency gains and (losses) 10 5 30 (5 ) Realized gains and (losses) on repurchased debt 10 1 1 2 Other income 11 540 66 83 Change in valuation of liabilities for insurance contracts 12 (254 ) (144 ) (602 ) Change in valuation of liabilities for investment contracts 12 (19 ) (18 ) - Policyholder claims and benefits - Other 12 34 45 17 Commissions and expenses 14 256 75 130 Impairment (charges) reversals 15 (40 ) (97 ) (1,250 ) Other charges 17 (235 ) (700 ) (774 ) Run-off businesses 5 30 54 88 Income / (loss) before tax 2,534 610 (514 ) ◆ Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives is reported as part of the respective line in Note 10 and reflects the over- or underperformance of investments and guarantees held at fair value for which the expected long-term return is included in underlying earnings before tax. ◆ Net fair value change of derivatives is reported as part of the respective line in Note 10 and includes: 1) the over- or underperformance of derivatives of EUR 9 million gain (2016: EUR 8 million gain, 2015: EUR 4 million gain) for which the expected long-term return is included in underlying earnings before tax; 2) Net fair value change on economic hedges where no hedge accounting is applied of EUR 145 million loss (2016: EUR 297 million loss, 2015: EUR 41 million loss); 3) Ineffective portion of hedge transactions to which hedge accounting is applied of EUR 2 million gain (2016: EUR 12 million gain, 2015: EUR 8 million gain). ◆ Net foreign currency gains and (losses) are reported as part of the respective line in Note 10. ◆ Change in valuation of liabilities for insurance contracts is reported as part of the respective line in Note 12. ◆ Change in valuation of liabilities for investment contracts is reported as part of the respective line in Note 12. ◆ Policyholder claims and benefits - Other are reported as part of the “Other” line in note 12 and is related to policyholder tax. ◆ Commissions and expenses include: 1) Restructuring charges of EUR 116 million (2016: EUR 54 million charge, 2015: EUR 59 million charge) which are reported as part of Employee and Administration expenses lines in Note 14; 2) Amortization of deferred expenses of EUR 285 million gain (2016: gain of EUR 137 million, 2015: gain of EUR 126 million) which is reported as part of the respective line in Note 14. This is offset against realized gains and losses and impairments on financial investments; 3) Amortization of VOBA and future servicing rights of EUR 94 million gain (2016: charge of EUR 8 million; 2015: gain of EUR 63 million) which is reported as part of the respective line in Note 14. Commissions and expenses include a DPAC/VOBA fair value adjustment of EUR 135 million (2016: EUR 105 million; 2015: EUR 41 million). ◆ Impairment (charges) reversals include: 1) Impairment charges and reversals on financial assets, excluding receivables of EUR 42 million charge (2016: EUR 59 million charge, 2015: EUR 24 million gain) as shown in Note 15; 2) Impairment charges and reversals on non-financial assets and receivables of EUR 1 million gain (2016: EUR 38 million charge; 2015: EUR 1,274 million charge) reported as part of the respective line in Note 15. ◆ There are no interest charges and related fees that are classified for segment reporting purposes as non-underlying earnings. Other selected income statement items LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Amortization of deferred expenses, VOBA and future servicing rights 336 27 134 55 - 33 - - - 586 Depreciation 44 16 28 8 3 1 3 2 - 105 Impairment charges / (reversals) on financial assets, excluding receivables 19 17 - 2 - - - 3 - 42 Impairment charges / (reversals) on non-financial assets and receivables (2 ) 3 - - - - - - - - 2016 Amortization of deferred expenses, VOBA and future servicing rights 761 32 177 59 - 32 - - 2 1,065 Depreciation 38 17 21 9 3 1 - 2 - 89 Impairment charges / (reversals) on financial assets, excluding receivables 35 12 - (1 ) - 1 5 7 - 59 Impairment charges / (reversals) on non-financial assets and receivables 7 (2 ) 31 (1 ) - - - - - 36 2015 Amortization of deferred expenses, VOBA and future servicing rights 731 39 377 80 - 34 - - - 1,261 Depreciation 31 17 23 9 2 1 - - - 84 Impairment charges / (reversals) on financial assets, excluding receivables (68 ) 20 - 2 21 - - - - (24 ) Impairment charges / (reversals) on non-financial assets and receivables - 2 1,274 - - - - - - 1,275 Number of employees LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Number of employees - headcount 10,951 3,089 3,435 2,337 610 6,025 1,500 371 28,318 Of which Aegon’s share of employees in joint ventures and associates 549 - - - 83 5,702 163 - 6,497 2016 Number of employees - headcount 11,943 4,464 2,673 2,317 600 5,579 1,474 330 29,380 Of which Aegon’s share of employees in joint ventures and associates 561 - - - 41 5,186 156 - 5,944 2015 Number of employees - headcount 12,701 4,503 2,478 2,470 534 7,163 1,382 299 31,530 Of which Aegon’s share of employees in joint ventures and associates 545 - - - 33 6,780 141 - 7,499 Summarized assets and liabilities per segment LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Assets Cash and Cash equivalents 548 8,382 317 67 116 71 141 1,125 - 10,768 Assets held for sale - - 5,249 - - - - - - 5,249 Investments 73,469 53,975 2,011 1,055 720 5,326 157 91 - 136,804 Investments for account of policyholders 102,964 26,697 62,961 1,343 105 - - - (6 ) 194,063 Investments in joint ventures 6 1,008 - - 480 118 99 1 - 1,712 Investments in associates 77 74 7 6 - 14 122 8 - 308 Deferred expenses 8,552 76 945 70 1 490 - - - 10,135 Other assets 26,628 6,763 1,840 245 72 1,786 101 28,427 (28,979 ) 36,883 Total assets 212,245 96,975 73,331 2,787 1,494 7,805 620 29,651 (28,985 ) 395,923 Liabilities Insurance contracts 68,556 34,379 1,451 624 703 6,696 - 24 (1,615 ) 110,818 Insurance contracts for account of policyholders 72,501 25,587 22,862 1,109 108 - - - - 122,168 Investment contracts 6,824 9,787 278 52 - 2 - - - 16,943 Investment contracts for account of policyholders 30,463 3,255 40,482 234 - - - - - 74,434 Liabilities held for sale - - 5,003 - - - - - - 5,003 Other liabilities 19,145 17,400 1,103 365 250 133 218 5,526 (1,684 ) 42,456 Total liabilities 197,490 90,408 71,178 2,385 1,061 6,830 218 5,550 (3,299 ) 371,821 Summarized assets and liabilities per segment LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2016 Assets Cash and Cash equivalents 928 7,410 1,010 47 92 271 183 1,407 - 11,347 Assets held for sale - - 8,705 - - - - - - 8,705 Investments 93,046 53,788 2,236 983 747 5,328 90 85 - 156,303 Investments for account of policyholders 107,341 27,985 66,786 1,418 88 - - - (7 ) 203,610 Investments in joint ventures 7 877 - - 495 134 99 - - 1,614 Investments in associates 95 21 8 2 - 21 125 (1 ) - 270 Deferred expenses 9,351 84 1,084 71 1 832 - - - 11,423 Other assets 20,725 7,766 1,920 174 77 2,018 109 29,308 (29,946 ) 32,152 Total assets 231,493 97,931 81,747 2,696 1,500 8,604 607 30,800 (29,952 ) 425,425 Liabilities Insurance contracts 75,942 34,900 1,747 558 722 7,466 - 20 (1,785 ) 119,569 Insurance contracts for account of policyholders 75,328 26,275 18,112 1,126 89 - - - - 120,929 Investment contracts 10,148 9,043 355 24 - 2 - - - 19,572 Investment contracts for account of policyholders 32,013 3,160 49,309 292 - - - - - 84,774 Liabilities held for sale - - 8,816 - - - - - - 8,816 Other liabilities 21,837 19,445 1,249 318 238 (78 ) 180 6,438 (2,203 ) 47,424 Total liabilities 215,268 92,822 79,586 2,318 1,049 7,390 180 6,458 (3,988 ) 401,084 Investments LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Shares 567 859 5 54 5 1 2 57 - 1,551 Debt securities 54,535 21,411 1,779 712 646 5,252 9 - - 84,344 Loans 8,831 30,189 - 275 54 6 - 13 - 39,368 Other financial assets 8,904 21 228 10 - 67 146 20 - 9,395 Investments in real estate 633 1,495 - 4 15 - - - - 2,147 Investments general account 73,469 53,975 2,011 1,055 720 5,326 157 91 - 136,804 Shares - 9,262 15,856 244 14 - - - (6 ) 25,370 Debt securities 3,116 13,370 8,125 216 9 - - - - 24,836 Unconsolidated investment funds 99,426 276 33,476 873 81 - - - - 134,132 Other financial assets 422 3,788 4,850 11 1 - - - - 9,072 Investments in real estate - - 655 - - - - - - 655 Investments for account of policyholders 102,964 26,697 62,961 1,343 105 - - - (6 ) 194,063 Investments on balance sheet 176,434 80,672 64,972 2,398 825 5,326 157 91 (6 ) 330,868 Off-balance sheet investments third parties 212,736 1,759 114,906 5,709 528 2,718 143,923 - (981 ) 481,297 Total revenue-generating investments 389,170 82,431 179,878 8,107 1,353 8,043 144,079 91 (987 ) 812,165 Investments Available-for-sale 59,459 19,841 2,007 756 651 5,299 137 20 - 88,170 Loans 8,831 30,189 - 275 54 6 - 13 - 39,368 Financial assets at fair value through profit or loss 107,511 29,147 62,310 1,363 105 21 20 57 (6 ) 200,528 Investments in real estate 633 1,495 655 4 15 - - - - 2,801 Total investments on balance sheet 176,434 80,672 64,972 2,398 825 5,326 157 91 (6 ) 330,868 Investments in joint ventures 6 1,008 - - 480 118 99 1 - 1,712 Investments in associates 77 74 7 6 - 14 122 8 - 308 Other assets 35,728 15,221 8,352 383 189 2,347 242 29,552 (28,979 ) 63,034 Consolidated total assets 212,245 96,975 73,331 2,787 1,494 7,805 620 29,651 (28,985 ) 395,923 Investments LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2016 Shares 793 334 84 35 4 - 2 62 - 1,314 Debt securities 70,766 23,741 2,036 633 683 5,310 - - - 103,169 Loans 10,820 28,117 - 303 45 18 - - - 39,303 Other financial assets 9,924 358 115 10 - - 88 23 - 10,519 Investments in real estate 743 1,238 - 3 15 - - - - 1,999 Investments general account 93,046 53,788 2,236 983 747 5,328 90 85 - 156,303 Shares - 9,689 15,503 295 13 - - - (7 ) 25,492 Debt securities 4,779 15,434 9,847 235 10 - - - - 30,305 Unconsolidated investment funds 102,534 - 36,600 879 64 - - - - 140,077 Other financial assets 27 2,862 4,150 9 1 - - - - 7,049 Investments in real estate - - 686 - - - - - - 686 Investments for account of policyholders 107,341 27,985 66,786 1,418 88 - - - (7 ) 203,610 Investments on balance sheet 200,387 81,774 69,021 2,401 834 5,328 90 85 (7 ) 359,914 Off-balance sheet investments third parties 240,072 952 5,333 3,154 507 2,734 130,889 - (864 ) 382,776 Total revenue-generating investments 440,458 82,725 74,354 5,556 1,342 8,061 130,979 85 (871 ) 742,690 Investments Available-for-sale 77,918 23,044 2,152 660 687 5,289 87 23 - 109,860 Loans 10,820 28,117 - 303 45 18 - - - 39,303 Financial assets at fair value through profit or loss 110,906 29,374 66,183 1,436 88 21 4 62 (7 ) 208,066 Investments in real estate 743 1,238 686 3 15 - - - - 2,685 Total investments on balance sheet 200,387 81,774 69,021 2,401 834 5,328 90 85 (7 ) 359,914 Investments in joint ventures 7 877 - - 495 134 99 - - 1,614 Investments in associates 95 21 8 2 - 21 125 (1 ) - 270 Other assets 31,003 15,260 12,718 293 170 3,122 293 30,715 (29,946 ) 63,627 Consolidated total assets 231,493 97,931 81,747 2,696 1,500 8,604 607 30,800 (29,952 ) 425,425

Premium income and premiums pai

Premium income and premiums paid to reinsurers	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Premium income and premiums paid to reinsurers	6 2017 2016 2015 Life insurance 19,952 20,400 19,583 Non-life insurance 2,874 3,053 3,342 Total premium income 22,826 23,453 22,925 - Accident and health insurance 2,511 2,609 2,703 - General insurance 363 444 640 Non-life insurance premium income 2,874 3,053 3,342 2017 2016 2015 Life insurance 3,214 2,932 2,694 Non-life insurance 217 244 286 Total premiums paid to reinsurers 3,431 3,176 2,979 - Accident and health insurance 205 238 268 - General insurance 13 7 18 Non-life insurance paid to reinsurers 217 244 286 Premium income Life insurance includes EUR 5,139 million (2016: EUR 5,255 million) of premiums related to insurance policies upgraded to the retirement platform in the UK.

Investment income

Investment income	12 Months Ended
	Dec. 31, 2017
Investment income	7 2017 2016 2015 Interest income 6,052 6,479 7,087 Dividend income 1,164 1,180 1,306 Rental income 121 129 133 Total investment income 7,338 7,788 8,525 Investment income related to general account 5,394 5,737 6,099 Investment income for account of policyholders 1,944 2,051 2,426 Total 7,338 7,788 8,525 Included in interest income is EUR 190 million (2016: EUR 230 million; 2015: EUR 223 million) in respect of interest income accrued on impaired financial assets. The interest income on financial assets that are not carried at fair value through profit or loss amounted to EUR 5,056 million (2016: EUR 5,642 million; 2015: EUR 5,951 million). Total investment income from: 2017 2016 2015 Shares 1,164 1,180 1,306 Debt securities and money market instruments 4,248 4,838 5,332 Loans 1,686 1,752 1,760 Real estate 121 129 133 Other 119 (111 ) (6 ) Total 7,338 7,788 8,525 Investment income from financial assets held for general account: 2017 2016 2015 Available-for-sale 3,467 4,007 4,235 Loans 1,686 1,752 1,760 Financial assets designated at fair value through profit or loss 148 80 115 Real estate 71 69 61 Derivatives 31 (139 ) (96 ) Other (10 ) (32 ) 25 Total 5,394 5,737 6,099
Aegon N.V [member]
Investment income	3 Investment income 2017 2016 Interest income from intercompany loans 65 104 Interest income from derivatives 18 17 Total Investment Income 83 121

Fee and commission income

Fee and commission income	12 Months Ended
	Dec. 31, 2017
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Fee and commission income	8 2017 2016 2015 Fee income from asset management 2,126 1,702 1,648 Commission income 535 562 614 Other 140 144 176 Total fee and commission income 2,802 2,408 2,438 Included in fee and commission income is EUR 190 million of fees on trust and fiduciary activities (2016: EUR 55 million; 2015: EUR 56 million). The increase of EUR 134 million in 2017 compared to 2016 was mainly driven by the acquisition of Cofunds in UK in January 2017.

Income from reinsurance ceded

Income from reinsurance ceded	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Income from reinsurance ceded	9 2017 2016 2015 Recovered claims and benefits 3,669 3,477 2,784 Change in technical provisions 497 (26 ) 309 Commissions 122 236 227 Total 4,288 3,687 3,321 Income from reinsurance ceded is generated from reinsurance activities directly related to premiums paid to reinsurers in note 6, therefore both should be viewed concurrently.

Results from financial transact

Results from financial transactions	12 Months Ended
	Dec. 31, 2017
Results from financial transactions	10 Results from financial transactions comprise: 2017 2016 2015 Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives 232 (42 ) (35 ) Realized gains and (losses) on financial investments 431 327 349 Gains and (losses) on investments in real estate 193 70 145 Net fair value change of derivatives (1,159 ) 239 123 Net fair value change on for account of policyholder financial assets at fair value through profit or loss 20,524 15,121 (110 ) Net fair value change on investments in real estate for account of policyholders 38 (26 ) 67 Net foreign currency gains and (losses) (20 ) 41 (29 ) Net fair value change on borrowings and other financial liabilities 10 21 9 Realized gains and (losses) on repurchased debt 1 1 2 Total 20,250 15,753 521 Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives comprise: 2017 2016 2015 Shares 25 4 - Debt securities and money market investments 127 8 (24 ) Other 80 (54 ) (12 ) Total 232 (42 ) (35 ) Other mainly includes net fair value changes of alternative investments. Realized gains and losses on financial investments comprise: 2017 2016 2015 Shares 165 46 44 Debt securities and money market investments 242 211 346 Loans 20 16 20 Other 3 54 (60 ) Total 431 327 349 Realized gains and losses on financial investments comprise: 2017 2016 2015 Available-for-sale investments 411 311 330 Loans 20 16 20 Total 431 327 349 Net fair value change of derivatives comprise: 2017 2016 2015 Net fair value change on economic hedges where no hedge accounting is applied 70 793 (500 ) Net fair value change on bifurcated embedded derivatives (1,231 ) (565 ) 614 Ineffective portion of hedge transactions to which hedge accounting is applied 2 12 8 Total (1,159 ) 239 123 The ineffective portion of hedge transactions to which hedge accounting is applied comprises: 2017 2016 2015 Fair value change on hedging instruments in a fair value hedge (12 ) (29 ) (49 ) Fair value change on hedged items in a fair value hedge 15 35 54 Ineffectiveness fair value hedge 3 7 5 Ineffectiveness cash flow hedges - 5 4 Total 2 12 8 Net fair value change on for account of policyholder financial assets at fair value through profit or loss comprise: 2017 2016 2015 Shares 2,372 2,462 706 Debt securities and money market investments 166 1,682 (529 ) Unconsolidated investment funds 17,720 10,496 (356 ) Derivatives 94 252 69 Other 171 230 - Total 20,524 15,121 (110 ) Net fair value change on for account of policyholder financial assets at fair value through profit or loss increased in 2017 compared to 2016, mainly from favorable equity markets results, which were partly offset by losses from interest rates movements. Net fair value changes on for account of policyholder financial assets at fair value through profit or loss are offset by changes in technical provisions reported as part of the lines Change in valuation of liabilities for insurance contracts and Change in valuation of liabilities for investment contracts in note 12 Policyholder claims and benefits.
Aegon N.V [member]
Results from financial transactions	4 Results from financial transactions 2017 2016 Results from financial transactions comprise: Net fair value change of derivatives 56 (68 ) Net foreign currency gains and (losses) - (2 ) Net fair value change on borrowings and other financial liabilities - 2 Total 56 (68 ) Net fair value change of derivatives mostly comprises of Fair value changes on derivatives that are designated as economic hedges for which no hedge accounting is applied.

Other income

Other income	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Other income	11 Other income 2017 2016 2015 Other income 540 66 83 Other income in 2017 of EUR 540 million mainly related to a book gain of EUR 231 million (USD 250 million) from the divestment of the payout annuity and the BOLI/COLI businesses in the Americas and a book gain of EUR 208 million on the sale of the Unirobe Meeùs Groep. Furthermore, a release of an expense reserve of EUR 82 million (GBP 71 million) was recorded that was embedded in the liabilities for insurance contracts following the completion of the Part VII transfer to Rothesay Life. Also EUR 17 million (GBP 14 million) related to the completion of the Part VII transfer of annuities reinsured to Legal & General in 2016 was included. For more details refer to note 51 Business combinations. Other income of EUR 66 million for 2016 includes the result on the sale of Transamerica Financial Advisors. This transaction has resulted in a gain of USD 58 million (EUR 52 million). Refer to note 51 Business combinations for more details. Other income in 2015 included a release of EUR 38 million of the earn out provision regarding Liberbank in Spain. In addition, other income included the results from the sale of Clark Consulting and the 25.1% share in Seven Investment Management (7IM). The 7IM transaction led to a net gain of EUR 10 million (GBP 7 million) and was recorded as an associate in the books of Aegon. The sale of Clark Consulting led to a book gain of EUR 7 million (USD 8 million). Please see also note 51 Business combinations for more details.

Policyholder claims and benefit

Policyholder claims and benefits	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Policyholder claims and benefits	12 Policyholder claims and benefits 2017 2016 2015 Benefits and claims paid life 23,634 23,877 23,130 Benefits and claims paid non-life 1,903 2,052 2,128 Change in valuation of liabilities for insurance contracts 22,741 16,193 7,880 Change in valuation of liabilities for investment contracts (2,644 ) (104 ) (6,678 ) Other (34 ) (45 ) (17 ) Total 45,599 41,974 26,443 Policyholder claims and benefits includes claims and benefits in excess of account value for products for which deposit accounting is applied and the change in valuation of liabilities for insurance and investment contracts. The lines Change in valuation of liabilities for insurance contracts and Change in valuation of liabilities for investment contracts reflect changes in technical provisions resulting from net fair value changes on for account of policyholder financial assets included in note 10 Results from financial transactions of EUR 20,524 million (2016: EUR 15,121 million, 2015: EUR (110) million). In addition, the line Change in valuation of liabilities for insurance contracts includes an increase of technical provisions for life insurance contracts of EUR 601 million (2016: increase of EUR 2,349 million, 2015: increase of EUR 3,410 million).

Profit sharing and rebates

Profit sharing and rebates	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Profit sharing and rebates	13 Profit sharing and rebates 2017 2016 2015 Surplus interest bonuses 2 4 2 Profit appropriated to policyholders 21 45 29 Total 23 49 31

Commissions and expenses

Commissions and expenses	12 Months Ended
	Dec. 31, 2017
Commissions and expenses	14 Commissions and expenses 2017 2016 2015 Commissions 2,661 2,929 3,313 Employee expenses 2,234 2,287 2,280 Administration expenses 1,424 1,273 1,278 Deferred expenses (980 ) (1,203 ) (1,533 ) Amortization of deferred expenses 543 880 1,143 Amortization of VOBA and future servicing rights 43 184 117 Total 5,925 6,351 6,598 Included in administration expenses is an amount of EUR 105 million of depreciation that relates to equipment, software and real estate held for own use (2016: EUR 89 million; 2015: EUR 84 million). Minimum lease payments recognized as expense amounted to EUR 18 million (2016: EUR 17 million; 2015: EUR 19 million). Employee expenses 2017 2016 2015 Salaries 1,470 1,471 1,462 Post-employment benefit costs 318 338 335 Social security charges 151 155 145 Other personnel costs 267 294 320 Shares, share appreciation rights, share options 28 28 17 Total 2,234 2,287 2,280 An amount of EUR 46 million is included in employee expenses relating to defined contributions (2016: EUR 46 million; 2015: EUR 51 million). Long-term incentive plans Senior managers within Aegon, not classified as ‘Identified Staff’, have been granted the conditional right to receive Aegon shares if certain performance indicators are met and depending on continued employment of the individual employee to whom the rights have been granted. The shares were conditionally granted at the beginning of the year at the volume weighted average price (VWAP) on the Euronext stock exchange in Amsterdam during the period between December 15 preceding a plan year and January 15 of a plan year. The performance indicators apply over a performance period of one year and consist of financial and non-financial targets set by the Supervisory Board or the local remuneration committees. Following the performance year, shares are allocated based on actual performance. A vesting period of two years applies after which the shares are transferred to the individual employees. In specific circumstances Aegon’s Supervisory Board will reclaim variable compensation that has already been paid out or vested. Variable compensation Identified Staff Members of the Executive Board and the Management Board as well as other selected jobholders have been defined as ‘Identified Staff’ in accordance with the rules applicable to them and their interpretation by relevant supervisory authorities. Of these, the Dutch 2015 Act on compensation in the financial sector (Wet beloningsbeleid financiële ondernemingen Wft) and the Dutch 2014 Decree on sound remuneration policy (Regeling beheerst beloningsbeleid 2014) are prominent examples. The rules have been adopted in Aegon’s Global Remuneration Framework. After the performance period, and based on the framework, variable compensation, if any, is partially made available and partly deferred. Variable compensation is paid in both cash and in Aegon N.V. shares. The shares were conditionally granted at the beginning of the year at the volume weighted average price (VWAP) on the Euronext stock exchange in Amsterdam during the period between December 15 preceding a plan year and January 15 of the plan year. The performance indicators apply over a performance period of one year and consist of Group and/or reporting unit targets (both financial and non-financial) set by the Supervisory Board or the local remuneration committees and personal/strategic targets. The conditional grant of variable compensation is also dependent on continued employment of the individual employee to whom the rights have been granted. An ex-post assessment is applicable to determine whether allocated (unvested) variable compensation should become unconditional or should be adjusted. In addition, in specific circumstances Aegon’s Supervisory Board will reclaim variable compensation that has already been paid out or vested. For members of the Executive Board and the Management Board all variable compensation has vested after three years following the performance period. At vesting, the variable compensation is transferred to the individual employees. Additional holding periods of up to three years may apply for vested shares. Members of the Executive Board and the members of the Management Board who are based in the Netherlands are not entitled to execute any transactions regarding the shares for a period of three years following vesting (with the exception of shares withheld or sold to cover for the payment of any applicable taxes, social security premiums and possible other deductions by the government due for which the Company holds a withholding obligation in connection with the vesting of the shares). In compliance with regulations under Dutch law, no transactions regarding the shares may be exercised in closed periods. Below an overview is provided of shares provided in active plans for Long-term incentive and Variable compensation Identified Staff. 2007 2011 1) 2012 1) 2013 1) 2014 1) 2015 1) 2016 1) 2017 1) Total Number of shares conditionally granted 2) 18,506 4,075,460 9,195,284 5,735,046 5,306,037 5,178,633 6,809,814 6,722,418 43,041,198 Number of shares allocated 18,506 6,452,535 13,392,200 8,536,076 4,714,569 4,942,275 7,155,420 - 45,211,581 Unvested at January 1, 2016 9,253 - 6,584,783 7,458,390 4,372,405 5,178,633 - - 23,603,464 Number of shares conditionally granted 2) - - - - - - 6,809,814 - 6,809,814 Number of shares allocated 280 - - (45,557 ) 16,937 (330,501 ) - - (358,841 ) Number of shares forfeited - - 76,435 141,013 95,977 15,985 - - 329,410 Number of shares vested 9,533 - 6,508,348 3,167,260 111,521 278,510 - - 10,075,172 Unvested at December 31, 2016 - - - 4,104,560 4,181,844 4,553,637 6,809,814 - 19,649,855 Number of shares conditionally granted 2) - - - - - - - 6,722,418 6,722,418 Number of shares allocated - - - - 49,780 - 345,606 - 395,386 Number of shares forfeited - - - - 42,580 116,505 136,506 - 295,591 Number of shares vested - - - 4,104,560 1,887,728 122,638 427,485 - 6,542,411 Unvested at December 31, 2017 - - - - 2,301,316 4,314,494 6,591,429 6,722,418 19,929,657 Average share price used for grant in EUR 3) 4.727 3.126 4.917 6.739 6.106 5.128 5.246 Fair value of shares at grant date in EUR 3.915 to 2.260 to 3.900 to 5.840 to 5.159 to 3.990 to 4.898 4.040 to 4.933 1 Performance year for both Long-term incentive plans and Variable compensation Identified Staff 2 Number of shares conditionally granted based on the at target number of grants made that could increase or decrease subject to the actual performance attained 3 This value is the volume weighted average price (VWAP) of Aegon on the Euronext Amsterdam stock exchange for the period December 15 to January 15 For the vested tranches from 2016 onwards Aegon introduced a net settlement option for participants to meet income tax obligations. This means that Aegon will not sell shares on the market, but hold these shares within Aegon and settle directly with the tax authorities in cash rather than selling shares first. The net settlement option does not change the share based payment right of the participants, therefore there is no incremental fair value, nor a related recognition of incremental fair value. Refer to note 53 Related party transactions for detailed information on conditional shares granted to the Executive Board.
Aegon N.V [member]
Commissions and expenses	5 Commissions and expenses 2017 2016 Employee expenses 80 80 Administration expenses 78 73 Cost sharing (76 ) (85 ) Total 82 68

Impairment charges _ (reversals

Impairment charges / (reversals)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Impairment charges / (reversals)	15 Impairment charges / (reversals) Impairment charges / (reversals) comprise: 2017 2016 2015 Impairment charges on financial assets, excluding receivables 74 117 95 Impairment reversals on financial assets, excluding receivables (32 ) (58 ) (119 ) Impairment charges and reversals on non-financial assets and receivables - 36 1,275 Total 42 95 1,251 In 2015, impairment charges and reversals on non-financial assets and receivables include a charge of EUR 1,274 million mainly related to deferred acquisition costs in the UK. Recoverability of capitalized deferred policy acquisition costs was affected by the restructuring of the organization. Impairment charges on financial assets, excluding receivables, from: 2017 2016 2015 Shares 2 1 4 Debt securities and money market instruments 17 53 32 Loans 50 23 37 Investments in associates 4 7 - Investments in joint ventures - - 21 Other - 33 - Total 74 117 95 Impairment reversals on financial assets, excluding receivables, from: 2017 2016 2015 Debt securities and money market instruments (17 ) (42 ) (109 ) Loans (13 ) (14 ) (9 ) Other (2 ) (2 ) - Total (32 ) (58 ) (119 ) For more details on impairments on financial assets, excluding receivables, refer to note 4 Financial risks.

Interest charges and related fe

Interest charges and related fees	12 Months Ended
	Dec. 31, 2017
Interest charges and related fees	16 Interest charges and related fees 2017 2016 2015 Subordinated loans 34 34 33 Trust pass-through securities 9 9 9 Borrowings 229 210 240 Other 162 95 129 Total 435 347 412 The interest charges accrued on financial assets and liabilities that are not carried at fair value through profit or loss amounted to EUR 162 million (2016: EUR 176 million; 2015: EUR 269 million).
Aegon N.V [member]
Interest charges and related fees	6 Interest charges and related fees 2017 2016 Subordinated borrowings 34 34 Borrowings 62 68 Other 4 4 Total 100 106

Other charges

Other charges	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Other charges	17 Other charges 2017 2016 2015 Other charges 235 700 774 Other charges in 2017 of EUR 235 million mainly relate to the book loss of EUR 105 million (USD 119 million) regarding the divestment of a block of life reinsurance business in the Americas and a charge of EUR 85 million (USD 100 million), regarding a provision in anticipation of a possible settlement in connection with an investigation by the SEC, refer to Note 48 Commitments and contingencies. In addition, an impairment of deferred transaction costs of EUR 36 million (GBP 32 million) was recorded as a result of the sale of Aegon Ireland plc, which is subject to customary regulatory approvals. For more details on the divestment of a block of US reinsurance run off business and Aegon Ireland plc. refer to note 51 Business combinations. Other charges in 2016 of EUR 700 million mainly relate to the book loss on the sale of the UK annuity portfolio (EUR 682 million) and charges related to claims and litigations regarding fees payable upon purchase or surrender of unit-linked policies in the Polish Life insurance portfolio (EUR 19 million). For more details on the sale of the UK annuity portfolio refer to note 22 Assets and Liabilities held for sale and note 51 Business combinations. In note 40 Provisions more details are provided on the Polish claims and litigations. Other charges of EUR 774 million in 2015 mainly relate to the book loss on the sale of Aegon’s Canadian life insurance business. For the sale of Canada refer to note 51 Business combinations.

Income tax

Income tax	12 Months Ended
	Dec. 31, 2017
Income tax	18 Income tax Note 2017 2016 2015 Current tax Current year 220 33 111 Adjustments to prior years 47 (46 ) (70 ) 267 (13 ) 42 Deferred tax 43 Origination / (reversal) of temporary differences 397 102 (169 ) Changes in tax rates / bases (550 ) 93 (22 ) Changes in deferred tax assets as a result of recognition / write off of previously not recognized / recognized tax losses, tax credits and deductible temporary differences (45 ) (54 ) (8 ) Non-recognition of deferred tax assets 41 33 22 Adjustments to prior years (45 ) 12 53 (201 ) 185 (125 ) Income tax for the period (income) / charge 65 172 (83 ) Adjustments to prior years include shifts between current and deferred tax. Reconciliation between standard and effective income tax: 2017 2016 2015 Income before tax 2,534 610 (514 ) Income tax calculated using weighted average applicable statutory rates 745 239 (57 ) Difference due to the effects of: Non-taxable income (157 ) (126 ) 43 Non-tax deductible expenses 28 21 49 Changes in tax rate/base (550 ) 93 (22 ) Different tax rates on overseas earnings (1 ) 8 6 Tax credits (67 ) (41 ) (100 ) Other taxes 67 38 14 Adjustments to prior years 2 (34 ) (17 ) Origination and change in contingencies 9 8 3 Changes in deferred tax assets as a result of recognition / write off of previously not recognized / recognized tax losses, tax credits and deductible temporary differences (45 ) (54 ) (8 ) Non-recognition of deferred tax assets 41 33 22 Tax effect of (profit) / losses from joint ventures and associates (7 ) (7 ) (8 ) Other (1 ) (6 ) (8 ) (680 ) (67 ) (27 ) Income tax for the period (income) / charge 65 172 (83 ) The weighted average applicable statutory tax rate for 2017 is 29.4% (2016: 39.2%; 2015: 11.0%). The decrease in the weighted average applicable statutory tax rate compared to 2016 is caused by relatively more income before tax in the Netherlands and the UK versus income before tax in the US. The weighted average applicable statutory tax rate in 2015 was impacted by a disproportional loss in the UK. Non-taxable income in 2017 includes the tax exempt sale proceeds of the Dutch Unirobe Meeùs Group. Non-taxable income in 2015 was negatively impacted by the non-deductible loss on the sale of Aegon’s Canadian life insurance business. Changes in tax rate/base in 2017 highly benefited by the decrease of the US corporate income tax rate from 35% to 21% as from January 1, 2018. Changes in tax rate/base in 2016 was heavily impacted by the release of profits from other comprehensive income (OCI) to income statement in the UK. These profits were taxed in the past against high historic tax rates and were released from OCI to the income statement against a lower statutory tax rate in 2016. The difference caused a negative impact in changes in tax rate/base. In the UK, the corporate income tax rate decreased to 19% as per April 1, 2017. The beneficial impact of this change was reflected in the 2015 change in tax rate/base. The tax rate will continue to decrease from 19% to 17% with effect from April 1, 2020. The minor impact of this tax rate change was included in the 2016 change in tax rate/base. In Hungary, the corporate income tax rate decreased from 19% to 9% as from January 1, 2017. The minor impact of this tax rate change was included in the 2016 change in tax rate/base. Tax credits in 2017 increased by US foreign tax credits. Tax credits in 2015 includes tax benefits related to solar investments in the US. Adjustments to prior years in 2016 included a one-time tax benefit in the US caused by the revised tax deduction for dividends received on prior filed tax returns. The following tables present income tax related to components of other comprehensive income and retained earnings. 2017 2016 2015 Items that will not be reclassified to profit and loss: Changes in revaluation reserve real estate held for own use 9 (3 ) (2 ) Remeasurements of defined benefit plans (175 ) 89 (75 ) (166 ) 86 (77 ) Items that may be reclassified subsequently to profit and loss: Gains / losses on revaluation of available-for-sale investments (134 ) (187 ) 810 Gains / losses transferred to the income statement on disposal and impairment of available-for-sale investments 441 427 124 Changes in cash flow hedging reserve 567 24 (98 ) Movement in foreign currency translation and net foreign investment hedging reserve 76 (39 ) (52 ) 951 225 783 Total income tax related to components of other comprehensive income 785 311 706 2017 2016 2015 Income tax related to equity instruments and other Income tax related to equity instruments 33 44 44 46 Other 14 (3 ) - Total income tax recognised directly in retained earnings 58 41 46 The income tax related to components of OCI includes a deferred tax benefit of EUR 479 million caused by the decrease of the US corporate income tax rate from 35% to 21% as from January 1, 2018.
Aegon N.V [member]
Income tax	7 Income tax 2017 2016 Current Tax - Current Tax 1 25 Income tax for the period (income) / charge 1 25 Reconciliation between standard and effective tax Income before tax (43 ) (121 ) Tax on income 11 30 Differences due to the effect of: Non deductible expenses (11 ) (6 ) Total 1 25

Earnings per share

Earnings per share	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Earnings per share	19 Earnings per share Basic earnings per share Basic earnings per share is calculated by dividing the net income attributable to owners, after deduction of coupons on perpetual securities and non-cumulative subordinated notes by the weighted average number of common shares, excluding common shares purchased by the Company and held as treasury shares (refer to note 32.1 Share capital – par value and 32.3 Treasury shares respectively). 2017 2016 2015 Net income / (loss) attributable to owners 2,469 437 (432 ) Coupons on perpetual securities (103 ) (105 ) (111 ) Coupons on non-cumulative subordinated notes (28 ) (28 ) (28 ) Net income / (loss) attributable to owners for basic earnings per share calculation 2,338 304 (571 ) Net income / (loss) attributable to common shareholders 2,321 302 (567 ) Net income / (loss) attributable to common shareholders B 16 2 (4 ) Weighted average number of common shares outstanding (in million) 2,042 2,048 2,101 Weighted average number of common shares B outstanding (in million) 575 575 584 Basic earnings per common share (EUR per share) 1.14 0.15 (0.27 ) Basic earnings per common share B (EUR per share) 0.03 - (0.01 ) Diluted earnings per share The diluted earnings per share equaled the basic earnings per share for all years disclosed since there were no outstanding share options which were considered dilutive.

Dividend per common share

Dividend per common share	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Dividend per common share	20 Dividend per common share Final dividend 2017 It will be proposed to the Annual General Meeting of Shareholders on May 18, 2018, absent unforeseen circumstances, to pay a final dividend for the year 2017 of EUR 0.14 per common share. After taking into account the interim dividend 2017 of EUR 0.13 per common share, this will result in a total 2017 dividend of EUR 0.27 per common share. With respect to the common shares B, each of which has financial rights attached to it of 1/40th of a common share, the proposed final dividend will be EUR 0.0035. After taking the interim dividend 2017 of EUR 0.00325 per common share B into account, this will result in a total 2017 dividend of EUR 0.00675 per common share B. Interim dividend 2017 The interim dividend 2017 was paid in cash or stock at the election of the shareholder. Approximately 57% of holders of common shares elected to receive the cash dividend. The remaining 43% have opted for stock dividend. The cash dividend amounted to EUR 0.13 per common share, the stock dividend amounted to one new Aegon common share for every 36 common shares held. The stock dividend and cash dividend are approximately equal in value. The interim dividend was payable as of September 15, 2017. The interim dividend 2017 for common shares B amounted to 1/40th of the dividend paid on common shares. To neutralize the dilutive effect of the 2016 final and 2017 interim dividend paid in shares, Aegon executed a program to repurchase 51,864,626 common shares. Between October 2, 2017, and December 15, 2017, these common shares were repurchased at an average price of EUR 5.0950 per share. These shares will be held as treasury shares and will be used to cover future stock dividends. Final dividend 2016 The Annual General Meeting of Shareholders on May 19, 2017, approved a final dividend over 2016 of EUR 0.13 per common share payable in either cash or stock, related to the second half of 2016. Approximately 54% of holders of common shares elected to receive the cash dividend. The remaining 46% have opted for stock dividend. The final dividend was payable as of June 23, 2017. The stock dividend amounted to one new Aegon common share for every 35 common shares held. The stock dividend and cash dividend are approximately equal in value. Dividend paid on common shares B amounted to 1/40th of the dividend paid on common shares. Interim dividend 2016 The interim dividend 2016 was paid in cash or stock at the election of the shareholder. Approximately 58% of holders of common shares elected to receive the cash dividend. The remaining 42% have opted for stock dividend. The cash dividend amounted to EUR 0.13 per common share, the stock dividend amounted to one new Aegon common share for every 28 common shares held. The stock dividend and cash dividend are approximately equal in value. The interim dividend was payable as of September 16, 2016. The interim dividend 2016 for common shares B amounted to 1/40th of the dividend paid on common shares. To neutralize the dilutive effect of the 2016 interim dividend paid in shares, Aegon executed a program to repurchase 30,765,224 common shares. Between October 3, 2016, and November 11, 2016, these common shares were repurchased at an average price of EUR 3.8406 per share. These shares will be held as treasury shares and will be used to cover future stock dividends. Final dividend 2015 The Annual General Meeting of Shareholders on May 20, 2016, approved a final dividend over 2015 of EUR 0.13 per common share payable in either cash or stock, related to the second half of 2015. Approximately 57% of holders of common shares elected to receive the cash dividend. The remaining 43% have opted for stock dividend. The final dividend was payable as of June 24, 2016. The stock dividend amounted to one new Aegon common share for every 30 common shares held. The stock dividend and cash dividend are approximately equal in value. Dividend paid on common shares B amounted to 1/40th of the dividend paid on common shares. To neutralize the dilutive effect of the 2015 final dividend paid in shares, Aegon executed a program to repurchase 29,258,662 common shares. Between July 4, 2016, and August 12, 2016, these common shares were repurchased at an average price of EUR 3.5054 per share. These shares will be held as treasury shares and will be used to cover future stock dividends. Interim dividend 2015 The interim dividend 2015 was paid in cash or stock at the election of the shareholder. Approximately 57% of holders of common shares elected to receive the cash dividend. The remaining 43% have opted for stock dividend. The cash dividend amounted to EUR 0.12 per common share, the stock dividend amounted to one new Aegon common share for every 45 common shares held. The stock dividend and cash dividend are approximately equal in value. The interim dividend was payable as of September 18, 2015. The interim dividend 2015 for common shares B amounted to 1/40th of the dividend paid on common shares. Aegon repurchased common shares to neutralize the dilutive effect of the 2015 interim dividend paid in shares. Aegon executed a program to repurchase 20,136,673 common shares. Between September 16, 2015, and October 13, 2015, these common shares were repurchased at an average price of EUR 5.2777 per share. These shares are held as treasury shares and will be used to cover future stock dividends.

Cash and cash equivalents

Cash and cash equivalents	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Cash and cash equivalents	21 Cash and cash equivalents 2017 2016 2015 Cash at bank and in hand 3,720 3,727 2,199 Short-term deposits 2,544 3,666 3,614 Money market investments 4,496 3,939 3,318 Short-term collateral 7 16 463 At December 31 10,768 11,347 9,594 The carrying amounts disclosed reasonably approximate the fair values as at the year-end. EUR 7 billion (2016: EUR 8 billion) of cash collateral is received related to securities lending, repurchase agreements and margins on derivatives transactions. A corresponding liability to repay the cash is recognized in other liabilities (note 44 Other liabilities). Refer to note 49 Transfer of financial assets for details on collateral received and paid. Investment of cash collateral received is restricted through limitations on credit worthiness, duration, approved investment categories and borrower limits. EUR 7 million (2016: EUR 16 million) of the cash collateral received is included in cash and cash equivalents and the remainder is included in other asset classes as that collateral is typically reinvested. Aegon earns a share of the spread between the collateral earnings and the rebate paid to the borrower of the securities. Due to the sale of the UK annuity portfolio in 2016 the short term collateral has decreased significantly since then. Income from securities lending programs was approximately EUR 11 million (2016: EUR 13 million; 2015: EUR 8 million). The weighted effective interest rate on short-term deposits was 0.32% negative (2016: 0.17% negative) and these deposits have an average maturity of 31 days (2016: 23 days). For the purposes of the cash flow statement, cash and cash equivalents comprise the following: Note 2017 2016 2015 Cash and cash equivalents 10,768 11,347 9,594 Cash classified as Assets held for sale 22 260 - - Bank overdrafts 44 (2 ) (1 ) - Bank overdrafts classified as Liabilities held for sale (1 ) - - Net cash and cash equivalents 11,026 11,346 9,593 Cash and cash equivalents include cash and demand balances held at the Dutch Central Bank. The Dutch Central Bank requires Aegon Bank N.V. to place 1% of their deposits with agreed maturity or the savings accounts (without restrictions to withdraw their money) in an account with the Dutch Central Bank. This deposit is renewed every 42-49 days, based on an updated valuation of total assets. The interest received on this deposit is equal to the ECB deposit rate (which was -40bp throughout 2017). The year-end minimum required balance on deposit by the Dutch Central Bank was EUR 67 million (2016: EUR 63 million). These deposits are therefore not freely available. Summary cash flow statement 2017 2016 2015 Net cash flows from operating activities 553 3,319 914 Net cash flows from investing activities (1,196 ) (1,078 ) 615 Net cash flows from financing activities 519 (465 ) (2,785 ) Net increase in cash and cash equivalents (125 ) 1,776 (1,257 ) Net cash and cash equivalents at December 31, 2017, are negatively impacted by effects of changes in exchange rates of EUR 196 million (2016: EUR 23 million negative; 2015: EUR 200 million positive). Analysis of cash flows 2017 compared to 2016 Net cash flows from operating activities Total net cash flows from operating activities decreased by EUR 2,766 million to a EUR 553 million inflow (2016: 3,319 EUR million inflow). The decrease is mainly driven by an outflow from results from financial transactions, changes in accruals and money market investments. These cash outflows are partly offset by the net purchase of investments for account of policyholders and by net changes in cash collateral. Net cash flows from investing activities Net cash flows from investing activities decreased by EUR 118 million to a EUR 1,196 million outflow (2016: EUR 1,078 million outflow). The total consideration paid for acquisitions, including cash in acquired entities, was EUR 52 million. The total consideration received for disposals, excluding transferred assets and reinsurance assets from reinsurance transactions, was EUR 299 million. Total consideration received in cash and cash equivalents amounted to EUR 306 million, as an earn-out of EUR 7 million was part of the total consideration. Transferred cash and cash equivalents amounts to an outflow of EUR 1,361 million as a result of reinsurance transactions and disposals of entities over which control is lost. The decrease is mainly driven by the aquisition of Cofunds Ltd., the divestment of the payout annuity business and Bank Owned Life Insurance / Corporate Owned Life Insurance business (BOLI/COLI) and the sale of Unirobe Meeùs Groep (UMG) (refer to note 51 Business combinations). Net cash flows from financing activities Net cash flows from financing activities increased by EUR 984 million to a EUR 519 million inflow (2016: EUR 465 million outflow). The increase is mainly a result of proceeds and repayments of borrowings (refer to the table below and note 39 Borrowings). 2016 compared to 2015 Net cash flows from operating activities Total net cash flows from operating activities increased by EUR 2,405 million to a EUR 3,319 million inflow (2015: EUR 914 million inflow). The increase is mainly driven by higher inflows from insurance and investment liabilities for account of policyholders and an increase in changes in other liabilities. These cash inflows are partly offset by a decrease in results from financial transactions. Net cash flows from investing activities Net cash flows from investing activities decreased by EUR 1,693 million to a EUR 1,078 million outflow (2015: EUR 615 million inflow). The total consideration received for disposals, excluding transferred assets and reinsurance assets from reinsurance transactions, was EUR 69 million. Total consideration received in cash and cash equivalents amounted to EUR 56 million as an earn-out of EUR 13 million was part of the total consideration. Transferred cash and cash equivalents amounts to an outflow of EUR 1,130 million as a result of reinsurance transactions and disposal of entities over which control is lost. The decrease is mainly driven by net cash outflows related to the sale of Aegon’s UK annuity portfolio and the commercial non-life insurance business in Aegon Nederland (refer to note 51 Business combinations). Net cash flows from financing activities Net cash flows from financing activities increased by EUR 2,320 million to a EUR 465 million outflow (2015: EUR 2,785 million outflow). The increase is a result of proceeds and repayments of borrowings (refer to note 39 Borrowings). This was partly offset by the share buyback program, executed in 2016, to neutralize the dilutive effect of the cancellation of the preferred shares in 2013. Reconciliation of liabilities arising from financing activities The table below shows the reconciliation between the net cash flows from financing activities and the liabilities as included in the consolidated statement of financial position. Cash flows Non-cash changes Reconciliation of debt from financing activities At Addition Repayment Realized Movements Amorti- Other Net At Subordinated borrowings 767 - - - - 6 - (9 ) 764 Trust pass-through securities 156 - - - (4 ) - - (19 ) 133 Borrowings 13,153 9,170 (7,918 ) (10 ) - (1 ) 1 (760 ) 13,635 Assets held to hedge Trust pass-through securities 22 - - (4 ) - - - (2 ) 15

Assets and liabilities held for

Assets and liabilities held for sale	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Assets and liabilities held for sale	22 Assets and liabilities held for sale Assets and liabilities held for sale include disposal groups whose carrying amount will be recovered principally through a sale transaction expected within the next year rather than through continuing operations. This relates to businesses for which a sale is agreed upon or a sale is highly probable at the reporting date, but for which the transaction has not yet fully closed. As of December 31, 2017, this relates to the assets and liabilities of Aegon Ireland plc. In 2017, following court approval on the Part VII transfer (22) Aegon Ireland plc., also referred to as VA Europe, is included in the UK segment (note 5 Segment information). For more information related to the sale transaction, refer to note 51 Business combinations. The table below presents the major types of assets and liabilities of Aegon Ireland plc. included in assets and liabilities classified as held for sale on the consolidated statement of financial position. Amounts in EUR million 2017 Assets Cash and cash equivalents 260 Investments 139 Investments for account of policyholders 4,775 Derivatives 57 Deferred tax assets 5 Deferred expenses 6 Other assets and receivables 7 Total assets 5,249 Liabilities Insurance contracts for account of policyholders 1,346 Investment contracts for account of policyholders 3,518 Derivatives 74 Deferred gains 43 Other liabilities 18 Accruals 3 Total liabilities 5,003 As of December 31, 2017, there are no unrealized gains relating to non-current assets and disposal groups classified as held for sale included in other comprehensive income. Fair value measurement The fair value hierarchy of financial assets and liabilities (measured at fair value), which are presented as held for sale is included below. The fair value hierarchy consists of three levels. Reference is made to note 3 Critical accounting estimates and judgment in applying accounting policies for more details on the fair value hierarchy. Level I Level II Level III Total 2017 Assets carried at fair value Fair value through profit or loss Shares 139 - - 139 Investments for account of policyholders 1,699 3,076 - 4,775 Derivatives - 57 - 57 Total assets at fair value 1,837 3,133 - 4,971 Liabilities carried at fair value Investment contracts for account of policyholders - 3,518 - 3,518 Derivatives - 41 33 74 Total liabilities at fair value - 3,559 33 3,592

Investments

Investments	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Investments	23 Investments Investments for general account comprise financial assets, excluding derivatives, as well as investments in real estate. Note 2017 2016 Available-for-sale (AFS) 88,170 109,860 Loans 39,368 39,303 Financial assets at fair value through profit or loss (FVTPL) 7,119 5,142 Total financial assets, excluding derivatives 23.1 134,658 154,304 Investments in real estate 23.2 2,147 1,999 Total investments for general account 136,804 156,303 The decrease of EUR 19.6 billion in financial assets, for general account, excluding derivatives compared to December 31, 2016 is mainly driven by the disposal of debt securities related to the divestments of the pay-out annuity and BOLI/COLI businesses and the block of life reinsurance in the Americas. In addition, the balance is affected by foreign exchange rates translation adjustments. Refer to note 51 Business combinations for the disposals of BOLI/COLI businesses and the block of life reinsurance in the Americas. Refer to note 47 Fair value for information on fair value measurement. Loans are held at amortized cost, but the estimated fair value is also disclosed in note 47. 23.1 Financial assets, excluding derivatives AFS FVTPL Loans Total Fair value 2017 Shares 490 1,062 - 1,551 1,551 Debt securities 80,200 4,144 - 84,344 84,344 Money market and other short-term investments 6,690 119 - 6,809 6,809 Mortgage loans - - 33,562 33,562 38,076 Private loans - - 3,642 3,642 4,181 Deposits with financial institutions - - 139 139 139 Policy loans - - 1,897 1,897 1,897 Other 791 1,795 127 2,713 2,713 At December 31, 2017 88,170 7,119 39,368 134,658 139,711 2016 Shares 824 490 - 1,314 1,314 Debt securities 101,054 2,115 - 103,169 103,169 Money market and other short-term investments 6,776 317 - 7,093 7,093 Mortgage loans - - 33,696 33,696 38,499 Private loans - - 3,166 3,166 3,569 Deposits with financial institutions - - 129 129 129 Policy loans - - 2,207 2,207 2,207 Other 1,206 2,219 104 3,529 3,529 At December 31, 2016 109,860 5,142 39,303 154,304 159,510 Of the debt securities, money market and other short-term investments, mortgage loans and private loans EUR 13,749 million is current (2016: EUR 15,729 million). Refer to note 47 Fair value for information on fair value measurement. Loan allowance Movement on the loan allowance account during the year were as follows: 2017 2016 At January 1 (137 ) (142 ) Addition charged to income statement (50 ) (23 ) Reversal to income statement 13 14 Amounts written off 10 17 Net exchange differences 3 - Other (4 ) (3 ) At December 31 (165 ) (137 ) Refer to note 49 Transfers of financial assets for a discussion of collateral received and paid. 23.2 Investments in real estate 2017 2016 At January 1 1,999 1,990 Additions 239 89 Subsequent expenditure capitalized 10 12 Transfers from other headings 1 34 Disposals (202 ) (215 ) Fair value gains / (losses) 193 70 Net exchange differences (89 ) 19 Other (4 ) (1 ) At December 31 2,147 1,999 95% of the value of Aegon’s properties, both for general account and for account of policyholders, were appraised (2016: 78%), of which 99% was performed by independent external appraisers (2016: 98%). Of the investments in real estate EUR 633 million (2016: EUR 743 million) is held by Aegon Americas and EUR 1,494 million (2016: EUR 1,238 million) is held by Aegon the Netherlands. Aegon USA has entered into a commercial property portfolio, consisting of office, retail and industrial buildings. These non-cancellable leases have remaining lease terms up to 20 years. Most leases include a clause to enable upward revision of the rental charge on an annual basis according to either a fixed schedule or prevailing market conditions. Aegon the Netherlands has entered into long-term residential property leases that can be terminated subject to a short-term notice. Under Dutch law, the maximum annual rent increase on residential property rented in the affordable housing segment is specified by the Dutch national government and equals the annual inflation rate plus a small margin. Refer to note 48 Commitments and contingencies for a description of non-cancellable lease rights. Rental income of EUR 71 million (2016: EUR 69 million; 2015: EUR 61 million) is reported as part of investment income in the income statement. Direct operating expenses (including repairs and maintenance) arising from investment property that generated rental income during the period amounted to EUR 21 million (2016: EUR 79 million; 2015: EUR 97 million). In 2017, EUR 1 million of direct operating expenses is related to investment properties that did not generate rental income during the period (2016: EUR 1 million; 2015: 1 million). Transfers from other headings mainly reflect the properties that were foreclosed during the year. The associated mortgage loans were previously reported as part of investments. There are no restrictions on the realizability of investment property or the remittance of income and proceeds of disposal. Refer to note 48 Commitments and contingencies for a summary of contractual obligations to purchase investment property or for repairs, maintenance or enhancements.

Investments for account of poli

Investments for account of policyholders	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Investments for account of policyholders	24 Investments for account of policyholders Investments for account of policyholders comprise financial assets at fair value through profit or loss, excluding derivatives, and investments in real estate. Note 2017 2016 Shares 25,370 25,492 Debt securities 24,836 30,305 Money market and other short-term investments 2,340 1,231 Deposits with financial institutions 2,946 2,951 Unconsolidated investment funds 134,132 140,077 Other 3,786 2,868 Total investments for account of policyholders at fair value through profit or loss, excluding derivatives 193,409 202,924 Investments in real estate 24.1 655 686 Total investments for account of policyholders 194,063 203,610 The decrease in investments for account of policyholders compared to December 31, 2016 is mainly caused by the reclassification to held for sale of Aegon Ireland plc. and negative foreign exchange rates translation adjustments. Refer to note 51 Business combinations for the sale of Aegon Ireland plc. Refer to note 47 Fair value for a summary of all financial assets and financial liabilities at fair value through profit or loss. 24.1 Investments in real estate for account of policyholders 2017 2016 At January 1 686 1,022 Additions 7 74 Subsequent expenditure capitalized 3 7 Disposals (53 ) (260 ) Fair value gains / (losses) 38 (26 ) Net exchange differences (26 ) (131 ) At December 31 655 686 The investment property is leased out under operating leases. Rental income of EUR 50 million (2016: EUR 60 million; 2015: EUR 72 million) is reported as part of investment income in the income statement. Direct operating expenses relating to investments in real estate for account of policyholder amounted to EUR 4 million in 2017 (2016: EUR 5 million, 2015: EUR 7 million). There are no restrictions on the realizability of investment property or the remittance of income and proceeds of disposal. Refer to note 48 Commitments and contingencies for a summary of contractual obligations to purchase investment property or for repairs, maintenance or enhancements.

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Derivatives	25 Derivatives Derivative asset Derivative liability 2017 2016 2017 2016 Derivatives for general account Derivatives not designated in a hedge 5,081 6,533 6,716 8,280 Derivatives designated as fair value hedges 32 45 48 119 Derivatives designated as cash flow hedges 393 1,234 233 250 Derivatives designated as Net foreign investment hedges 57 104 57 123 5,563 7,916 7,053 8,771 Derivatives for account of policyholders Derivatives not designated in a hedge 349 402 76 107 349 402 76 107 Total derivatives 1) 5,912 8,318 7,130 8,878 1 Refer to note 47 Fair value for a summary of all financial assets and financial liabilities at fair value through profit or loss. The fair value of derivatives on both the asset and liability side of the consolidated statement of financial position decreased during 2017 mainly due to changes in interest rates and other market movements during the year, as well as purchases, disposals and maturities. The divestment of the payout annuity business and Bank Owned Life Insurance / Corporate Owned Life Insurance (BOLI/ COLI) business in the Americas contributed to the decrease of derivative assets with EUR 259 million compared to December 31, 2016. See note 47 Fair value for details on fair value measurement of derivatives. Of the derivatives EUR 495 million (2016: EUR 1,030 million) and EUR 949 million (2016: EUR 2,537 million) are current derivative assets and liabilities respectively. Aegon the Netherlands partially hedges the risk of future longevity increases in the Netherlands related to a part of its insurance liabilities. These longevity derivatives are constructed to pay out if the mortality rates in future years have decreased more than a pre-determined percentage compared with the base scenario at the moment of signing the contract. The above mentioned transactions are used to enhance Aegon’s risk-return profile and to improve capital efficiency. The derivatives are measured at fair value through profit or loss in accordance with IAS 39. The value of the longevity derivatives are calculated using an internal model as there is no active market for this type of derivatives. For more details refer to the paragraph on underwriting risk included in note 36 Insurance contracts and the paragraph on derivatives included in note 47 Fair value. Use of derivatives Derivatives not designated in a hedge - general account Derivative asset Derivative liability Derivatives not designated in a hedge – general account 2017 2016 2017 2016 Derivatives held as an economic hedge 4,933 6,398 4,774 6,122 Bifurcated embedded derivatives 13 12 1,937 2,192 Other 134 124 5 (35 ) Total 5,081 6,533 6,716 8,280 Aegon utilizes derivative instruments as a part of its asset liability risk management practices. The derivatives held for risk management purposes are classified as economic hedges to the extent that they do not qualify for hedge accounting, or that Aegon has elected not to apply hedge accounting. The economic hedges of certain exposures relate to an existing asset, liability or future reinvestment risk. In all cases, these are in accordance with internal risk guidelines and are closely monitored for continuing compliance. Bifurcated embedded derivatives that are not closely related to the host contracts have been bifurcated and recorded at fair value in the consolidated statement of financial position. These bifurcated embedded derivatives are embedded in various institutional products, modified coinsurance and unit-linked insurance contracts in the form of guarantees for minimum benefits. Please refer to note 38 Guarantees in insurance contracts for more disclosures about these guarantees. CDSs Aegon has entered into free-standing credit derivative transactions. The positions outstanding at the end of the year were: 2017 2016 Notional Fair value Notional Fair value CDSs 3,606 92 4,466 51 2017 2016 Credit derivative disclosure by quality Notional Fair value Notional Fair value AAA 4 - 1 - AA 83 2 483 2 A 750 15 763 7 BBB 2,392 68 2,849 41 BB 357 8 243 - B or lower 21 - 128 3 Total 3,606 92 4,466 51 Certain derivatives are used to add risk by selling protection in the form of single name and index based credit default swaps. Another strategy used is to synthetically replicate corporate and government credit exposures with credit derivatives. This involves the purchase of high quality, low risk assets and the sale of credit derivatives. The table above provides a breakdown to credit quality of these credit derivatives. Derivatives designated as fair value hedges Aegon’s fair value hedges consist mainly of interest rate swaps, swaptions, equity and fixed income total return swaps, equity options, equity futures, bond futures and variance swaps that are used to protect against changes in the fair value of interest rate and equity sensitive instruments or liabilities. Gains and losses on derivatives designated under fair value hedge accounting are recognized in the income statement. The effective portion of the fair value change on the hedged item is also recognized in the income statement. As a result, only the net accounting ineffectiveness has an impact on the net result. Aegon has entered into interest rate swap agreements that effectively convert certain fixed-rate assets and liabilities to a floating-rate basis (generally to six months or less LIBOR). These hedges are used for portfolio management to better match assets to liabilities or to protect the value of the hedged item from interest rate movements. These agreements involve the payment or receipt of fixed-rate interest amounts in exchange for floating-rate interest amounts over the life of the agreement without the exchange of the underlying principal amounts. Some of the arrangements use forward starting swaps to better match the duration of assets and liabilities. Aegon has entered into cross-currency interest rate swap agreements that effectively convert certain foreign currency fixed-rate and floating-rate assets and liabilities to US dollar floating-rate assets and liabilities. These agreements involve the exchange of the underlying principal amounts. For the years ended December 31, 2017, 2016, and 2015, Aegon recognized gains and (losses) related to the ineffectiveness portion of designated fair value hedges of EUR (6) million, EUR 26 million and EUR (17) million respectively. No portion of derivatives was excluded when assessing hedge effectiveness. Derivatives designated as cash flow hedges Aegon has entered primarily into interest rate swap agreements that effectively convert certain variable-rate assets and liabilities to a fixed-rate basis in order to match the cash flows of the assets and liabilities within Aegon’s portfolio more closely. These agreements involve the payment or receipt of variable-rate interest amounts in exchange for fixed-rate interest amounts over the life of the agreement without the exchange of the underlying principal amounts. Aegon hedges its exposure to the variability of future cash flows from the interest rate movements for terms up to 28 years for hedges converting existing floating-rate assets and liabilities to fixed-rate assets. Aegon uses forward starting interest rate swap agreements to hedge the variability in future cash flows associated with the forecasted purchase of fixed-income assets. These agreements reduce the impact of future interest rate changes on the forecasted transaction. Fair value adjustments for these interest rate swaps are deferred and recorded in equity until the occurrence of the forecasted transaction at which time the interest rate swaps will be terminated. The accumulated gain or loss in equity will be amortized into investment income as the acquired asset affects income. Aegon hedges its exposure to the variability of future cash flows from interest rate movements for terms up to 26 years. The cash flows from these hedging instruments are expected to affect the profit and loss for approximately the next 35 years. For the year ended December 31, 2017, the contracts for which cash flow hedge accounting was terminated resulted in deferred gains of EUR 598 million (2016: EUR 407 million) that are recognized directly in equity to be reclassified into net income during the period when the cash flows occur of the underlying hedged items. During the year ended December 31, 2017, EUR 248 million of Aegon’s cash flow hedges were discontinued, due to the divestment of the payout annuity and BOLI/COLI businesses. Refer to note 51 Business combinations for more details regarding this divestment. Outside of this transaction no other of Aegon’s cash flow hedges were discontinued as it was highly probable that the original forecasted transactions would occur by the end of the originally specified time period documented at the inception of the hedging relationship. Aegon projects investment needs many years into the future in order to support the insurance liabilities and pay all contractual obligations arising from the policies in force today. In addition, Aegon also makes use of cross currency swaps to convert variable or fixed foreign currency cash flows into fixed cash flows in local currencies. The cash flows from these hedging instruments are expected to occur over the next 19 years. These agreements involve the exchange of the underlying principal amounts. For the year ended December 31, 2017, Aegon recognized EUR 0 million of hedge ineffectiveness on cash flow hedges (2016: EUR 5 million gain; 2015: EUR 4 million gain). In 2017, EUR 113 million loss was reclassified from equity into investment income (2016: EUR 37 million loss, 2015: EUR 13 million loss). The amount of deferred gains or losses to be reclassified from equity into net income during the next 12 months is expected to be EUR 63 million gain. The periods when the cash flows are expected to occur are as follows: < 1 year 1 – 5 years 5 – 10 years > 10 years 2017 Total Cash inflows 78 315 312 5,648 6,352 Cash outflows - 1 4 - 5 Net cash flows 78 314 309 5,648 6,348 < 1 year 1 – 5 years 5 – 10 years > 10 years 2016 Total Cash inflows 319 1,326 888 8,338 10,870 Cash outflows - 1 4 - 5 Net cash flows 318 1,325 883 8,338 10,864 Net foreign investment hedges Aegon funds its investments in insurance subsidiaries with a mixture of debt and equity. Aegon aims to denominate debt funding in the same currency as the functional currency of the investment. Investments outside the eurozone, the United States and the United Kingdom are funded in euros. When the debt funding of investments is not in the functional currency of the investment, Aegon uses derivatives to swap the currency exposure of the debt instrument to the appropriate functional currency. This policy will ensure that total capital will reflect currency movements without distorting debt to shareholders’ equity ratios. Aegon utilizes various financial instruments as designated hedging instruments of its foreign investments. These instruments include long-term and short-term borrowings, short-term debts to credit institutions, cross currency swap contracts and forward foreign exchange contracts.

Investments in joint ventures

Investments in joint ventures	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Investments in joint ventures	26 Investments in joint ventures 2017 2016 At January 1 1,614 1,561 Additions 81 92 Share in net income 161 137 Share in changes in joint ventures equity (note 32.6) (15 ) 9 Dividend (118 ) (196 ) Net exchange difference (17 ) (4 ) Other 7 15 At December 31 1,712 1,614 All joint ventures are unlisted and are accounted for using the equity method and are considered to be non-current. The investments in joint ventures include interest in insurance companies that are required to maintain a minimum solvency margin based on local directives. Such restrictions can affect the ability of these joint ventures to transfer funds in the form of cash dividends, or repayment of loans or advances, and therefore, there can be no assurance that these restrictions will not become a limitation in the future. Refer to note 48 Commitments and contingencies for any commitments and contingencies related to investments in joint ventures. There are no unrecognized shares of losses in joint ventures. The financial statements of the principal joint ventures have the same reporting date as the Group. Refer to note 52 Group companies for a listing of the investments in joint ventures and the Group’s percentage holding. Summarized financial information of joint ventures The summarized financial information presented in the following table presents the joint ventures on a 100% basis. Aegon considers its investment in AMVEST Vastgoed B.V. (AMVEST) a material joint venture and is therefore presented separately. AMVEST Other Joint ventures 2017 2016 2017 2016 Summarized statement of financial position Cash and cash equivalents 109 135 342 373 Other current assets 166 237 721 737 Total current assets 276 372 1,063 1,110 Non-current assets 3,173 2,519 6,521 6,375 Total assets 3,449 2,891 7,584 7,485 Current financial liabilities excluding trade payables and other provisions - - 30 60 Other current liabilities 133 149 503 403 Total current liabilities 133 149 533 464 Non-current financial liabilities excluding trade payables and other provisions 643 476 220 292 Other non-current liabilities - - 5,871 5,721 Total non-current financial liabilities 643 476 6,091 6,013 Total liabilities 776 625 6,624 6,477 Net assets 2,673 2,266 960 1,009 Summarized statement of comprehensive income Revenue 91 86 1,420 1,248 Results from financial transactions 275 205 (1 ) 1 Depreciation and amortization - - (20 ) (12 ) Interest income - - 186 48 Interest expense (5 ) (7 ) (3 ) (3 ) Profit or loss 357 275 160 122 Income tax (expense) or income (1 ) (10 ) (74 ) (47 ) Post-tax profit or (loss) 357 266 86 75 Other comprehensive income - 7 (32 ) 13 Total comprehensive income 357 273 54 89 Dividends received 49 95 69 101 An overview of the summarized financial information of the carrying amount of the joint ventures is as follows: AMVEST Other Joint ventures 2017 2016 2017 2016 Net assets of joint venture as presented above 2,673 2,266 960 1,009 Net assets of joint venture excluding goodwill 2,673 2,266 587 626 Group share of net assets of joint venture, excluding goodwill 1,008 877 312 338 Goodwill on acquisition - - 373 383 Carrying amount 1,008 877 685 721 The difference in the carrying value of investments in joint ventures of EUR 1,712 million (2016: EUR 1,614 million) and the total of the carrying value of joint ventures presented above of EUR 1,693 million (2016: EUR 1,598 million) relates to joint ventures with a negative carrying value of EUR 18 million (2016: EUR 16 million) which have been reclassified to Provisions. Aegon’s group share of net assets of joint ventures, as presented in the table above, is less than Aegon’s share of the net assets as presented in the summarized financial information on a 100% basis, due to the inclusion of third parties in the joint ventures. The following table includes the summarized financial information of the joint ventures based on the Group’s relative holding. AMVEST Other Joint ventures 2017 2016 2017 2016 Post-tax profit or loss 126 106 35 28 Other comprehensive income - 2 (14 ) 7 Total comprehensive income 126 108 20 34

Investments in associates

Investments in associates	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Investments in associates	27 Investments in associates 2017 2016 At January 1 270 242 Additions 73 20 Disposals (15 ) (4 ) Share in net income 11 3 Share in changes in associate’s equity (note 32.6) (5 ) 3 Impairment losses (1 ) - Dividend (11 ) (7 ) Net exchange difference (13 ) 13 At December 31 308 270 All associates are unlisted and are accounted for using the equity method and are considered to be non-current. The investments in associates include interest in insurance companies that are required to maintain a minimum solvency margin based on local directives. Such restrictions can affect the ability of these associates to transfer funds in the form of cash dividends, or repayment of loans or advances, and therefore, there can be no assurance that these restrictions will not become a limitation in the future. There are no unrecognized shares of losses in associates. The financial statements of the principal associates have the same reporting date as the Group. Refer to note 52 Group companies for a listing of the investments in associates and the Group’s percentage holding. Summarized financial information of associates 2017 2016 Post-tax profit or loss 9 3 Other comprehensive income (5 ) 3 Total comprehensive income 3 7 Carrying amount 308 270 The summarized financial information of associates presented above is based on the Group’s relative holding.

Reinsurance assets

Reinsurance assets	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Reinsurance assets	28 Reinsurance assets Assets arising from reinsurance contracts related to: 2017 2016 Life insurance general account 17,419 9,714 Life insurance for account of policyholders 2 2 Non-life insurance 1,327 1,481 Investment contracts 453 11 At December 31 19,202 11,208 Amounts due from reinsurers in respect of claims already paid by the Group are included in note 30 Other assets and receivables. Of the reinsurance assets EUR 13 million is current (2016: EUR 15 million). Movements during the year in reinsurance assets relating to Life insurance Life insurance for Total life insurance At January 1, 2017 9,714 2 9,716 Gross premium and deposits – existing and new business 11,326 6 11,332 Unwind of discount / interest credited 533 - 533 Insurance liabilities released (2,877 ) (3 ) (2,880 ) Fund charges released (49 ) - (49 ) Changes to valuation of expected future benefits 823 - 823 Policy transfers (38 ) - (38 ) Net exchange differences (1,698 ) - (1,697 ) Transfers to disposal groups (239 ) (3 ) (242 ) Transfer to/from insurance contract 23 - 23 Other movements (97 ) - (97 ) At December 31, 2017 17,419 2 17,421 At January 1, 2016 9,677 64 9,741 Gross premium and deposits – existing and new business 13,108 897 14,005 Unwind of discount / interest credited 783 23 806 Insurance liabilities released (5,965 ) 15 (5,950 ) Fund charges released (11 ) - (11 ) Changes to valuation of expected future benefits 38 - 38 Policy transfers (14 ) - (14 ) Net exchange differences 183 (6 ) 177 Transfers to disposal groups (8,085 ) (991 ) (9,076 ) At December 31, 2016 9,714 2 9,716 Movements during the year in reinsurance assets relating to non-life insurance: 2017 2016 At January 1 1,481 1,503 Gross premium and deposits – existing and new business 99 111 Unwind of discount / interest credited 89 89 Insurance liabilities released (129 ) (148 ) Changes to valuation of expected future benefits 28 (57 ) Changes in unearned premiums (42 ) (37 ) Incurred related to current year 85 66 Incurred related to prior years 37 30 Release for claims settled current year (19 ) (12 ) Release for claims settled prior years (119 ) (117 ) Change in IBNR (8 ) (2 ) Shadow accounting adjustment 6 19 Net exchange differences (180 ) 41 Portfolio transfers and acquisitions 2 - Other movements (4 ) (5 ) At December 31 1,327 1,481 Assets arising from reinsurance contracts related to: 2017 2016 Normal course of business 6,648 7,609 Exit of a business 12,553 3,599 At December 31 19,202 11,208 Reinsurance assets increased by EUR 8.0 billion compared to December 31, 2016 mainly due to the divestment of the payout annuity, BOLI/COLI businesses and a block of life reinsurance business in the US. For more details on the divestment of these businesses refer to note 51 Business combinations. The assets arising from reinsurance contracts related to the exit of a business per December 31, 2017 and 2016 relate, next to the above mentioned divestments, also to the sale of Aegon’s life reinsurance business from Transamerica Reinsurance (TARe) to SCOR, completed on August 9, 2011. The divestment of TARe consists of a series of reinsurance agreements between various statutory insurance entities and SCOR for the US domestic business.

Deferred expenses

Deferred expenses	12 Months Ended
	Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract]
Deferred expenses	29 Deferred expenses 2017 2016 DPAC for insurance contracts and investment contracts with discretionary participation features 9,688 10,882 Deferred cost of reinsurance 41 60 Deferred transaction costs for investment management services 406 481 At December 31 10,135 11,423 Current 838 1,080 Non-current 9,297 10,343 The divestment of the payout annuity and BOLI/COLI business in the Americas resulted in a write off of deferred policy acquisition costs of EUR 205 million. In addition, deferred policy acquisition costs are predominantly impacted by unfavorable currency translation adjustments. DPAC Deferred costs of Deferred At January 1, 2017 10,882 60 481 Costs deferred during the year 938 - 41 Amortization through income statement (770 ) (13 ) (29 ) Shadow accounting adjustments (216 ) - - Impairments - - (36 ) Net exchange differences (1,227 ) (7 ) (52 ) Transfers to disposal groups (6 ) - - Other 88 - - At December 31, 2017 9,688 41 406 DPAC Deferred costs of Deferred At January 1, 2016 10,457 72 467 Costs deferred during the year 1,157 - 46 Disposal of group assets (9 ) - - Amortization through income statement (837 ) (14 ) (28 ) Shadow accounting adjustments 38 - - Impairments (31 ) - - Net exchange differences 119 1 (3 ) Other (12 ) - - At December 31, 2016 10,882 60 481 In the following table a breakdown is provided of DPAC balances by line of business and reporting segment: Americas The United Central & Spain & Asia Total 2017 Life 6,351 20 162 70 1 420 7,025 Individual savings and retirement products 1,743 - - - - - 1,743 Pensions - 55 741 - - - 797 Run-off business 53 - - - - - 53 Non-life - - - - - 71 71 At December 31 8,148 76 903 70 1 490 9,688 2016 Life 6,674 25 156 71 1 740 7,668 Individual savings and retirement products 1,911 - - - - - 1,911 Pensions - 59 839 - - - 899 Run-off business 312 - - - - - 312 Non-life - - - - - 92 92 At December 31 8,898 84 996 71 1 832 10,882

Other assets and receivables

Other assets and receivables	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Other assets and receivables	30 Other assets and receivables Note 2017 2016 Real estate held for own use and equipment 30.1 530 572 Receivables 30.2 8,091 8,530 Accrued income 30.3 1,382 1,565 At December 31 10,002 10,667 30.1 Real estate held for own use and equipment Net book value General account real Equipment Total At January 1, 2016 338 237 575 At December 31, 2016 332 241 572 At December 31, 2017 307 223 530 Cost At January 1, 2017 453 593 1,046 Additions 3 68 71 Acquired through business combinations - 11 11 Capitalized subsequent expenditure 1 - 1 Disposals (34 ) (144 ) (179 ) Unrealized gains/(losses) through equity 8 - 8 Transfer to investments in real estate - - - Transfers to disposal groups - (5 ) (5 ) Net exchange differences (34 ) (40 ) (74 ) Other - 7 7 At December 31, 2017 396 488 885 Accumulated depreciation and impairment losses At January 1, 2017 121 352 474 Depreciation through income statement 8 63 71 Disposals (28 ) (131 ) (159 ) Impairment losses - - - Impairment losses reversed (1 ) - (1 ) Transfers to disposal groups - (5 ) (5 ) Net exchange differences (10 ) (20 ) (30 ) Other - 6 6 At December 31, 2017 90 265 355 Cost At January 1, 2016 442 544 986 Additions 8 58 67 Acquired through business combinations - - - Capitalized subsequent expenditure 2 - 2 Disposals (1 ) (11 ) (12 ) Unrealized gains/(losses) through equity 8 - 8 Transfer to investments in real estate (15 ) - (15 ) Transfers to disposal groups - - - Net exchange differences 8 2 10 Other - - - At December 31, 2016 453 593 1,046 Accumulated depreciation and impairment losses At January 1, 2016 104 307 411 Depreciation through income statement 9 54 63 Disposals - (9 ) (9 ) Impairment losses 7 - 7 Impairment losses reversed - - - Transfers to disposal groups - - - Net exchange differences 2 - 2 Other - - - At December 31, 2016 121 352 474 General account real estate held for own use are mainly held by Aegon USA and Aegon the Netherlands, with relatively smaller holdings at Aegon Hungary and Aegon Spain. The carrying value under a historical cost model amounted to EUR 319 million (2016: EUR 350 million). 30% of the value of the general account real estate held for own use was last revalued in 2017 (2016: 35%), based on market value appraisals by qualified internal and external appraisers. 95% of the appraisals in 2017 were performed by independent external appraisers (2016: 97%). General account real estate held for own use has not been pledged as security for liabilities, nor are there any restrictions on title. Depreciation expenses are recorded in Commissions and expenses in the income statement. The useful lives of buildings range between 40 and 50 years. None of the equipment is held for lease (2016: none). Equipment has not been pledged as security for liabilities, nor are there any restrictions on title. Depreciation expenses have been recorded in Commissions and expenses in the income statement. Equipment is generally depreciated over a period of three to five years. 30.2 Receivables 2017 2016 1) Loans to associates 12 2 Loans to joint ventures 13 7 Receivables from policyholders 999 1,187 Receivables from brokers and agents 400 459 Receivables from reinsurers 2,708 1,979 Cash outstanding from assets sold 46 67 Trade receivables 910 1,434 Cash collateral 1,545 1,457 Reverse repurchase agreements 230 77 Income tax receivable 85 477 Other 1,190 1,463 Provision for doubtful debts (48 ) (79 ) At December 31 8,091 8,530 Current 8,061 8,487 Non-current 30 44 1 Certain amounts within Receivables in 2016 have been reclassified to conform to the current year presentation as certain accounts were previously not mapped correctly to the line items disclosed in this note. These reclassifications are not considered material as these reclassifications had no effect on net income, shareholder’s equity and earnings per share, nor on the total of receivables of EUR 8,530 reported in 2016. The reclassifications have been made to the line items Receivables from policyholders, Receivables from brokers and agents, Receivables from reinsurers, Cash outstanding from assets sold, Trade receivables, Cash collateral and Other. The movements in the provision for doubtful debts during the year were as follows: 2017 2016 At January 1 (79 ) (107 ) Additions charged to earnings (6 ) (5 ) Unused amounts reversed through the income statement 4 7 Used during the year 31 26 Net exchange differences 2 - At December 31 (48 ) (79 ) 30.3 Accrued income 2017 2016 Accrued interest 1,357 1,543 Other 25 22 At December 31 1,382 1,565 Of accrued income EUR 1,364 million is current (2016: EUR 1,547 million).

Intangible assets

Intangible assets	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Intangible assets	31 Intangible assets Net book value Goodwill VOBA Future Software Other Total At January 1, 2016 299 1,472 57 61 12 1,901 At December 31, 2016 294 1,399 64 50 12 1,820 At December 31, 2017 293 1,153 99 51 36 1,633 Cost At January 1, 2017 503 7,576 327 362 109 8,876 Additions - 6 - 29 2 37 Acquisitions through business combinations 56 - 47 9 29 140 Capitalized subsequent expenditure - - - 3 - 3 Disposals (55 ) (175 ) - (98 ) - (328 ) Net exchange differences (42 ) (841 ) (15 ) (9 ) (11 ) (919 ) Transfers to disposal groups - - - (2 ) - (2 ) At December 31, 2017 462 6,565 359 294 128 7,808 Accumulated amortization, depreciation and impairment losses At January 1, 2017 209 6,177 263 311 97 7,056 Amortization through income statement - 63 7 28 6 104 Shadow accounting adjustments - 26 - - - 26 Disposals (28 ) (165 ) - (95 ) - (288 ) Impairment losses - - - 8 - 8 Net exchange differences (11 ) (689 ) (9 ) (8 ) (11 ) (728 ) Transfers to disposal groups - - - (2 ) - (2 ) At December 31, 2017 169 5,412 260 243 92 6,176 Cost At January 1, 2016 507 7,462 314 381 105 8,769 Additions - 2 - 16 3 21 Acquisitions through business combinations (8 ) - 12 - - 4 Capitalized subsequent expenditure - - - 3 - 3 Disposals - - - (3 ) - (3 ) Net exchange differences 4 112 1 (35 ) 1 83 At December 31, 2016 503 7,576 327 362 109 8,876 Accumulated amortization, depreciation and impairment losses At January 1, 2016 208 5,990 257 320 93 6,868 Amortization through income statement - 178 6 25 2 211 Shadow accounting adjustments - (89 ) - - - (89 ) Disposals - - - (3 ) - (3 ) Net exchange differences - 98 (1 ) (30 ) 2 69 At December 31, 2016 209 6,177 263 311 97 7,056 Amortization and depreciation through income statement is included in Commissions and expenses. None of the intangible assets have titles that are restricted or have been pledged as security for liabilities. With the exception of goodwill, all intangible assets have a finite useful life and are amortized accordingly. VOBA and future servicing rights are amortized over the term of the related insurance contracts, which can vary significantly depending on the maturity of the acquired portfolio. VOBA currently recognized is amortized over an average period of 24 years, with an average remaining amortization period of 7 years (2016: 8 years). Future servicing rights are amortized over an average period up to 30 years, of which 14 years remain at December 31, 2017 (2016: 9 years). Software is generally depreciated over an average period of 5 years. At December 31, 2017, the remaining average amortization period was 4 years (2016: 3 years). Goodwill increased by EUR 56 million and “customer intangibles” by EUR 29 million (included in the line “Other”) following the acquisition of Cofunds Ltd. in January 2017. Future servicing rights increased by EUR 36 million following the acquisition of the Nordea second-pillar pension fund in August 2017. The line disposals reflects the divestment of the payout annuity and BOLI/COLI business in the Americas and Unirobe Meeùs Groep in the Netherlands impacting goodwill by EUR 27 million, VOBA by EUR 11 million and software by EUR 3 million. Refer to note 51 Business combinations on the acquisitions of Cofunds Ltd and Nordea second-pillar pension fund. As well as the divestments of the payout annuity and BOLI/COLI business, and Unirobe Meeùs Groep. Goodwill The goodwill balance has been allocated across the cash-generating units which are expected to benefit from the synergies inherent in the goodwill. Goodwill is tested for impairment both annually and when there are specific indicators of a potential impairment. The recoverable amount is the higher of the value in use and fair value less costs of disposal for a cash-generating unit. The operating assumptions used in all the calculations are best estimate assumptions and based on historical data where available. The economic assumptions used in all the calculations are based on observable market data and projections of future trends. All the cash-generating units tested showed that the recoverable amounts were higher than their carrying values, including goodwill. A reasonably possible change in any key assumption is not expected to cause the carrying value of the cash-generating units to exceed its recoverable amount. A geographical summary of the cash-generating units to which the goodwill is allocated is as follows: Goodwill 2017 2016 Americas 174 198 Central & Eastern Europe 34 36 Asset Management 31 36 United Kingdom 54 - The Netherlands - 25 At December 31 293 294 Goodwill in Aegon USA is allocated to groups of cash-generating units including variable annuities, fixed annuities and the retirement plans cash-generating unit. Value in use calculations of Aegon USA have been actuarially determined based on business plans covering a period of typically three years and pre-tax risk adjusted discount rates. The value in use tests in the USA for the group of annuities cash-generating units remain unchanged from prior year except for the impact of currency translation adjustments (2017: EUR 121 million: 2016: EUR 131 million) and the retirement plans cash-generating unit (2017: EUR 52 million: 2016: EUR 57 million). The tests assume business plans covering a period of three years further extrapolated to ten years, where the new business levels for years 4-10 assumed a 0% growth rate (2016: 0%). The pre-tax adjusted discount rate was 17% for annuities and 18% for retirement plans as determined at date of acquisition. To determine the recoverable amounts of the cash generating units of Aegon Central & Eastern Europe (CEE), value in use was calculated, and compared to the carrying amounts. Value in use has been determined based on a business plan covering a period of typically 3 years, that, in certain instances was further extrapolated to 20 years where the new business levels for years 4-20 assumed a growth rate based on the business plan of the third year, prudentially decreased by 20% (2016: 20%). Other key assumptions used for the calculation were pre-tax risk adjusted discount rate of 8.3%-14.6% (2016: 7.4%-15.9%), new business contribution, renewals, asset fees, investment return, persistency and expenses. Operating assumptions are best estimate assumptions and based on historical data where available. Economic assumptions are based on observable market data and projections of future trends. For Aegon UK, goodwill was allocated to one cash-generating unit – Cofunds Ltd., whose value in use EUR 263 million exceeded its carrying value. This was determined using a management approved business plan spanning 3 years and terminal growth rate prudentially assumed at 3%. Other key assumptions were post-tax discount rate of 10.8% and pre-tax discount rate of 11.8% used to adjust cash flows forecast. VOBA The movement in VOBA over 2017 can be summarized and compared to 2016 as follows: 2017 2016 At January 1 1,399 1,472 Additions 6 2 Disposals (11 ) - Amortization / depreciation through income statement (63 ) (178 ) Shadow accounting adjustments (26 ) 89 Net exchange differences (153 ) 14 At December 31 1,153 1,399 A geographical summary of the lines of business to which the VOBA is allocated is as follows: VOBA Americas The Netherlands United Kingdom Asia Total 2017 Life 883 - - 1 884 Individual savings and retirement products 144 - - - 144 Pensions 7 17 98 - 122 Run-off businesses 4 - - - 4 Total VOBA 1,038 17 98 1 1,153 2016 Life 1,028 - - 10 1,038 Individual savings and retirement products 181 - - - 181 Pensions 10 22 118 - 149 Distribution - 8 - - 8 Run-off businesses 23 - - - 23 Total VOBA 1,242 30 118 10 1,399

Shareholders' equity

Shareholders' equity	12 Months Ended
	Dec. 31, 2017
Shareholders' equity	32 Shareholders’ equity Issued share capital and reserves attributable to shareholders of Aegon N.V. Note 2017 2016 2015 Share capital – par value 32.1 322 319 328 Share premium 32.2 7,731 7,873 8,059 Total share capital 8,053 8,193 8,387 Retained earnings 9,699 7,609 8,100 Treasury shares 32.3 (325 ) (190 ) (269 ) Total retained earnings 9,374 7,419 7,832 Revaluation reserves 32.4 4,920 5,381 6,471 Remeasurement of defined benefit plans 32.5 (1,669 ) (1,820 ) (1,532 ) Other reserves 32.6 (390 ) 1,347 1,283 Total shareholders’ equity 20,288 20,520 22,441 In May 2017, Aegon issued a total of 1,979,260 common shares B with a par value of EUR 0.12 to compensate for the dilution of Vereniging Aegon’s shareholding caused by the allocation of shares with senior management on May 19, 2017, in connection with the Long Term Incentive Plans for senior management. In June 2017, Aegon distributed to its shareholders who elected stock dividend a total number of 26,916,371 common shares in respect to the final dividend for 2016. This stock dividend distribution was paid from treasury shares (note 32.3 Treasury shares). In June 2017, Aegon issued to Vereniging Aegon 13,042,612 common shares B with a par value of EUR 0.12 to compensate for the dilution of Vereniging Aegon’s shareholding caused by the distribution of the final dividend 2016 in shares. In September 2017, Aegon distributed to its shareholders 24,948,255 common shares as interim dividend 2017 in the form of stock. This stock dividend distribution was paid from treasury shares (note 32.3 Treasury shares) and with the issuance of 21,099,402 common shares with a par value of EUR 0.12 In December 2017, Aegon completed a share buyback program to neutralize the dilutive effect of the 2016 final dividend and 2017 interim dividend paid in shares, and repurchased a total of 51,864,626 common shares. Furthermore, in December 2017, Aegon repurchased 13,042,592 common shares B from Vereniging Aegon to keep the voting rights of Vereniging Aegon on the agreed level. In June 2016, Aegon distributed to its shareholders who elected stock dividend a total number of 29,258,662 common shares in respect to the final dividend for 2015. This stock dividend distribution was paid from treasury shares (note 32.3 Treasury shares) and with the issuance of 9,121,989 common shares with a par value of EUR 0.12. In September 2016, Aegon distributed to its shareholders 30,765,224 common shares as interim dividend 2016 in the form of stock. This stock dividend distribution was paid from treasury shares (note 32.3 Treasury shares) and with the issuance of 1,506,562 common shares with a par value of EUR 0.12. In 2016, following each distribution of stock dividend, Aegon completed a share buyback program to neutralize the dilutive effect of the 2015 final dividend and 2016 interim dividend paid in shares, and repurchased a total of 60,023,886 common shares. Aegon also executed a EUR 400 million share buyback program in which 83,116,535 common shares were repurchased. These common shares have been repurchased as part of a program to neutralize the dilutive effect of the cancellation of the preferred shares in 2013. All 83,116,535 common shares repurchased under this program were cancelled in September 2016. Furthermore, in June 2016, Aegon repurchased 17,324,960 common shares B from Vereniging Aegon to keep the voting rights of Vereniging Aegon on the agreed level. In June 2015, Aegon distributed to its shareholders who elected stock dividend a total number of 16,279,933 common shares in respect to the final dividend for 2014. This stock dividend distribution was fully paid from treasury shares (note 32.3 Treasury shares). In September 2015, Aegon distributed to its shareholders 20,136,673 common shares as interim dividend 2015 in the form of stock. This stock dividend distribution was paid from 19,047,358 treasury shares (note 32.3 Treasury shares) and with the issuance of 1,089,315 common shares with a par value of EUR 0.12. In 2015, following each distribution of stock dividend, Aegon completed a share buyback program to neutralize the dilutive effect of the 2014 final dividend and 2015 interim dividend paid in shares, and repurchased a total of 36,416,606 common shares. Furthermore, in 2015, Aegon issued a total of 3,696,440 common shares B with a par value of EUR 0.12 to compensate for the dilution of Vereniging Aegon’s shareholding caused by the issuance of shares on January 1, 2015 and May 21, 2015, in connection with the Long Term Incentive Plans for senior management. 32.1 Share capital – par value 2017 2016 2015 Common shares 251 249 258 Common shares B 70 70 70 At December 31 322 319 328 Common shares 2017 2016 2015 Authorized share capital 720 720 720 Number of authorized shares (in million) 6,000 6,000 6,000 Par value in cents per share 12 12 12 Common shares B 2017 2016 2015 Authorized share capital 360 360 360 Number of authorized shares (in million) 3,000 3,000 3,000 Par value in cents per share 12 12 12 Common shares Common shares B Number of shares Number of shares (thousands) Total amount (thousands) Total amount At January 1, 2015 2,145,948 258 581,326 70 Shares issued - - 3,696 - Dividend 1,089 - - - At December 31, 2015 2,147,037 258 585,022 70 Dividend 10,629 1 - - Shares withdrawn (83,117 ) (10 ) - - At December 31, 2016 2,074,549 249 585,022 70 Dividend 21,099 3 - - At December 31, 2017 2,095,648 251 585,022 70 Weighted average number of Weighted average number of 2015 2,146,261 583,608 2016 2,129,074 585,022 2017 2,080,792 585,022 All issued common shares and common shares B each have a nominal value of EUR 0.12 and are fully paid up. Repayment of capital can only be initiated by the Executive Board, is subject to approval of the Supervisory Board and must be resolved by the General Meeting of Shareholders. Moreover, repayment on common shares B needs approval of the related shareholders. Refer to ‘Other information’ for further information on dividend rights. Vereniging Aegon, based in The Hague, the Netherlands, holds all of the issued and outstanding common shares B. Under the terms of the 1983 Amended Merger Agreement, dated May 2013, Vereniging Aegon has a call option relating to common shares B. Vereniging Aegon may exercise its call option to keep or restore its total stake at 32.6%, irrespective of the circumstances which cause the total shareholding to be or become lower than 32.6%. 32.2 Share premium 2017 2016 2015 At January 1 7,873 8,059 8,270 Share dividend (142 ) (186 ) (211 ) At December 31 7,731 7,873 8,059 Share premium relating to: - Common shares 6,078 6,220 6,406 - Common shares B 1,653 1,653 1,653 Total share premium 7,731 7,873 8,059 The share premium account reflects the balance of paid-in amounts above par value at issuance of new shares less the amounts charged for share dividends. 32.3 Treasury shares On the reporting date, Aegon N.V. and its subsidiaries held 65,650,650 (2016: 48,780,045) of its own common shares and 15,345,680 (2016: 17,324,960) own common shares B with a par value of EUR 0.12 each. Movements in the number of treasury common shares of Aegon N.V. were as follows: 2017 2016 2015 Number of shares Amount Number of shares Amount Number of shares Amount At January 1 47,473 178 42,998 257 49,537 306 Transactions in 2017: Sale: transactions, average price EUR 3.44 (4,085 ) (14 ) Sale: 1 transaction, average price EUR 3.68 (26,916 ) (99 ) Sale: 1 transaction, average price EUR 3.77 (3,849 ) (14 ) Purchase: 1 transaction, average price EUR 5.09 51,865 263 Transactions in 2016: Purchase: transactions, average price EUR 4.81 83,117 400 Sale: transactions, price average EUR 6.49 (6,153 ) (40 ) Sale: 1 transaction, price EUR 6.38 (20,137 ) (129 ) Purchase: transactions, average price EUR 3.51 29,259 103 Sale: 1 transaction, price EUR 5.11 (29,259 ) (150 ) Shares withdrawn: 1 transaction, price EUR 4.60 (83,117 ) (382 ) Purchase: transactions, average price EUR 3.84 30,765 118 Transactions in 2015: Sale: 1 transaction, price EUR 7.24 (7,628 ) (47 ) Sale: 1 transaction, price EUR 6.62 (16,280 ) (93 ) Purchase: transactions, average price EUR 6.63 16,280 108 Sale: 1 transaction, price EUR 5.40 (19,047 ) (123 ) Purchase: transactions, average price EUR 5.28 20,137 106 At December 31 64,488 314 47,473 178 42,998 257 Movements in the number of treasury common shares B of Aegon N.V. were as follows: 2017 2016 2015 Number of shares Amount Number of shares Amount Number of shares (thousands) Amount At January 1 17,325 2 - - - - Transactions in 2017: Sale: 1 transaction, average price EUR 0.11 (1,979 ) - Sale: 1 transaction, average price EUR 0.11 (13,043 ) (1 ) Purchase: 1 transaction, average price EUR 0.13 13,043 2 Transactions in 2016: Purchase: transactions, average price EUR 0.11 17,325 2 Transactions in 2015: - - - - - - - At December 31 15,346 2 17,325 2 - - As part of their insurance and investment operations, subsidiaries within the Group also hold Aegon N.V. common shares, both for their own account and for account of policyholders. These shares have been treated as treasury shares and are (de)recognized at the consideration paid or received. 2017 2016 2015 Number of shares Total Number of shares Total Number of shares Total Common shares Held by Aegon N.V. 64,488 314 47,473 178 42,998 257 Held by subsidiaries 1,162 9 1,307 10 1,534 12 Common shares B Held by Aegon N.V. 15,346 2 17,325 2 - - At December 31 80,996 325 66,105 190 44,532 269 Weighted average number of treasury shares, including Weighted average number of treasury 2015 45,097 - 2016 81,570 9,893 2017 38,490 9,841 32.4 Revaluation reserves Available-for-sale Real estate held for Cash flow hedging Total At January 1, 2017 3,418 59 1,904 5,381 Gross revaluation 1,310 8 (115 ) 1,203 Net (gains) / losses transferred to income statement (1,330 ) - (738 ) (2,069 ) Foreign currency translation differences (228 ) (8 ) (216 ) (452 ) Tax effect 308 9 567 883 Other (28 ) - 1 (27 ) At December 31, 2017 3,450 68 1,402 4,920 At January 1, 2016 4,546 52 1,873 6,471 Gross revaluation 857 8 (131 ) 733 Net (gains) / losses transferred to income statement (2,122 ) - 78 (2,044 ) Foreign currency translation differences (101 ) 2 61 (38 ) Tax effect 240 (3 ) 24 262 Other (2 ) - - (2 ) At December 31, 2016 3,418 59 1,904 5,381 At January 1, 2015 6,741 42 1,525 8,308 Gross revaluation (2,479 ) 8 278 (2,193 ) Net (gains) / losses transferred to income statement (485 ) - (13 ) (498 ) Disposal of a business (468 ) - - (468 ) Foreign currency translation differences 307 5 181 492 Tax effect 934 (2 ) (98 ) 833 Other (3 ) - - (3 ) At December 31, 2015 4,546 52 1,873 6,471 The revaluation accounts for both available-for-sale investments and for real estate held for own use include unrealized gains and losses on these investments, net of tax. Upon sale, the amounts realized are recognized in the income statement (for available-for-sale investments) or transferred to retained earnings (for real estate held for own use). Upon impairment, unrealized losses are recognized in the income statement. The closing balances of the revaluation reserve for available-for-sale investments relate to the following instruments: 2017 2016 2015 Shares 40 130 139 Debt securities 3,423 3,245 4,354 Other (14 ) 43 53 Revaluation reserve for available-for-sale investments 3,450 3,418 4,546 The cash flow hedging reserve includes (un)realized gains and losses on the effective portions of hedging instruments, net of tax. The amounts are recognized in the income statement at the moment of realization of the hedged position to offset the gain or loss from the hedged cash flow. No amounts have been released from equity to be included in the initial measurement of non-financial assets or liabilities. 32.5 Remeasurement of defined benefit plans 2017 2016 2015 At January 1 (1,820 ) (1,532 ) (1,611 ) Remeasurements of defined benefit plans 224 (392 ) 234 Tax effect (175 ) 89 (75 ) Net exchange differences 102 16 (86 ) Disposal of a business - - 6 Total remeasurement of defined benefit plans (1,669 ) (1,820 ) (1,532 ) 32.6 Other reserves Foreign Net foreign Equity Total At January 1, 2017 1,734 (418 ) 31 1,347 Movement in foreign currency translation and net foreign investment hedging reserves (1,929 ) 129 - (1,800 ) Disposal of a business 7 - - 7 Tax effect 108 (32 ) - 76 Equity movements of joint ventures - - (15 ) (15 ) Equity movements of associates - - (5 ) (5 ) At December 31, 2017 (80 ) (321 ) 11 (390 ) At January 1, 2016 1,731 (467 ) 19 1,283 Movement in foreign currency translation and net foreign investment hedging reserves 25 65 - 91 Tax effect (22 ) (17 ) - (39 ) Equity movements of joint ventures - - 9 9 Equity movements of associates - - 3 3 At December 31, 2016 1,734 (418 ) 31 1,347 At January 1, 2015 268 (382 ) 27 (86 ) Movement in foreign currency translation and net foreign investment hedging reserves 1,687 (181 ) - 1,505 Disposal of a business (127 ) 51 - (76 ) Tax effect (98 ) 45 - (52 ) Equity movements of joint ventures - - (8 ) (8 ) Equity movements of associates - - (1 ) (1 ) At December 31, 2015 1,731 (467 ) 19 1,283 The foreign currency translation reserve includes the currency results from investments in non-euro denominated subsidiaries. The amounts are released to the income statement upon the sale of the subsidiary. The net foreign investment hedging reserve is made up of gains and losses on the effective portions of hedging instruments, net of tax. The amounts are recognized in the income statement at the moment of realization of the hedged position to offset the gain or loss from the net foreign investment. The equity movements of joint ventures and associates reflect Aegon’s share of changes recognized directly in the joint venture’s and associate’s equity.
Aegon N.V [member]
Shareholders' equity	13 Shareholders’ equity LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO At January 1, 2017 319 7,873 5,450 (1,820 ) 1,316 1,169 5,966 (190 ) 437 20,520 Net income 2016 retained - - - - - - 437 - (437 ) - Net income 2017 - - - - - - - - 2,469 2,469 Total net income / (loss) - - - - - - 437 - 2,032 2,469 Foreign currency translation differences and movement in foreign investment hedging reserves - - - 102 (1,717 ) - - - - (1,615 ) Changes in revaluation subsidiaries - - (461 ) - - - - - - (461 ) Remeasurement of defined benefit plans of group companies - - - 49 - - - - - 49 Transfer to legal reserve - - 28 - - (47 ) (1 ) - - (20 ) Other - - - - - - 12 - - 12 Other comprehensive income / (loss) - - (433 ) 151 (1,717 ) (47 ) 11 - - (2,035 ) Shares issued 3 - - - - - - - - 3 Dividend common shares - (142 ) - - - - (296 ) - - (438 ) Dividend withholding tax reduction - - - - - - 2 - - 2 Treasury shares - - - - - - 30 (136 ) - (106 ) Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax - - - - - - (131 ) - - (131 ) Repurchased and sold own shares - - - - - - 4 - - 4 At December 31, 2017 322 7,731 5,017 (1,669 ) (401 ) 1,122 6,022 (325 ) 2,469 20,288 LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO At January 1, 2016 328 8,059 6,551 (1,532 ) 1,264 1,048 7,423 (269 ) (432 ) 22,440 Net income 2015 retained - - - - - - (432 ) - 432 - Net income 2016 - - - - - - - - 437 437 Total net income / (loss) - - - - - - (432 ) - 869 437 Foreign currency translation differences and movement in foreign investment hedging reserves - - - 16 52 - - - - 68 Changes in revaluation subsidiaries - - (1,090 ) - - - - - - (1,090 ) Remeasurement of defined benefit plans of group companies - - - (304 ) - - - - - (304 ) Transfer to legal reserve - - (11 ) - - 121 (97 ) - - 13 Other - - - - - - (2 ) - - (2 ) Other comprehensive income / (loss) - - (1,101 ) (288 ) 52 121 (99 ) - - (1,316 ) Shares issued 1 - - - - - - - - 1 Shares withdrawn (10 ) - - - - - (372 ) - - (382 ) Dividend common shares - (186 ) - - - - (304 ) - - (490 ) Dividend withholding tax reduction - - - - - - (2 ) - - (2 ) Treasury shares - - - - - - (106 ) 79 - (27 ) Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax - - - - - - (133 ) - - (133 ) Repurchased and sold own shares - - - - - - (9 ) - - (9 ) At December 31, 2016 319 7,873 5,450 (1,820 ) 1,316 1,169 5,966 (190 ) 437 20,520 The balance of the revaluation account, which includes revaluation reserves for real estate and investments that do not have a frequent market listing, consisted of EUR 5,380 million (2016: EUR 6,113 million) of items with positive revaluation and of EUR 363 million (2016: EUR 663 million) of items with negative revaluation. The revaluation account and legal reserves, foreign currency translation reserve and other, can not be freely distributed. In case of negative balances for individual reserves legally to be retained, no distributions can be made out of retained earnings to the level of these negative amounts. Certain of Aegon’s subsidiaries, principally insurance companies, are subject to restrictions on the amounts of funds they may transfer in the form of cash dividends or otherwise to their parent companies. There can be no assurance that these restrictions will not limit or restrict Aegon in its ability to pay dividends in the future. On the reporting date, Aegon N.V., and its subsidiaries held 65,650,650 of its own common shares (2016: 48,780,045) with a nominal value of EUR 0.12 each. Most of the shares have been purchased to neutralize the dilution effect of issued share dividend and to hedge share based payment plans for executives and employees. Aegon N.V. held 15,345,680 of its own common shares B (2016:17,324,960) with a nominal value of 0.12 each. Movements in the number of treasury common shares of Aegon N.V. were as follows: 2017 2016 Number of shares Amount Number of shares Amount At January 1 47,473 178 42,998 257 Transactions in 2017: Sale: transactions, average price EUR 3.44 (4,085 ) (14 ) Sale: 1 transaction, average price EUR 3.68 (26,916 ) (99 ) Sale: 1 transaction, average price EUR 3.77 (3,849 ) (14 ) Purchase: 1 transaction, average price EUR 5.09 51,865 263 Transactions in 2016: Purchase: transactions, average price EUR 4.81 83,117 400 Sale: transactions, price average EUR 6.49 (6,153 ) (40 ) Sale: 1 transaction, price EUR 6.38 (20,137 ) (129 ) Purchase: transactions, average price EUR 3.51 29,259 103 Sale: 1 transaction, price EUR 5.11 (29,259 ) (150 ) Shares withdrawn: 1 transaction, price EUR 4.60 (83,117 ) (382 ) Purchase: transactions, average price EUR 3.84 30,765 118 At December 31 64,488 314 47,473 178 Movements in the number of treasury common shares B of Aegon N.V. were as follows: 2017 2016 Number of shares Amount Number of shares (thousands) Amount At January 1 17,325 2 - - Transactions in 2017: Sale: transaction, average price EUR 0.11 (1,979 ) - Sale: transaction, average price EUR 0.11 (13,043 ) (1 ) Purchase: transaction, average price EUR 0.13 13,043 2 Transactions in 2016: Purchase: transactions, average price EUR 0.11 17,325 2 At December 31 15,346 2 17,325 2 As part of their insurance and investment operations, subsidiaries within the Group also hold Aegon N.V. common shares, both for their own account and for account of policyholders. These shares have been treated as treasury shares and are included at their consideration paid or received. 2017 2016 Number of shares Total amount Number of shares Total amount Common shares Held by Aegon N.V. 64,488 314 47,473 178 Held by subsidiaries 1,163 9 1,307 10 Common shares B Held by Aegon N.V. 15,346 2 17,325 2 At December 31 80,996 325 66,105 190 The consideration for the related shares is deducted from or added to the retained earnings.

Other equity instruments

Other equity instruments	12 Months Ended
	Dec. 31, 2017
Other equity instruments	33 Other equity instruments Junior Perpetual Share options 1) Non-cumulative Total At January 1, 2017 3,008 454 65 271 3,797 Shares granted - - 26 - 26 Shares vested - - (30 ) - (30 ) At December 31, 2017 3,008 454 61 271 3,794 At January 1, 2016 3,008 454 68 271 3,800 Shares granted - - 13 - 13 Shares vested - - (16 ) - (16 ) At December 31, 2016 3,008 454 65 271 3,797 At January 1, 2015 3,008 454 94 271 3,827 Shares granted / Share options cost incurred - - 26 - 26 Shares vested / Share options forfeited - - (53 ) - (53 ) At December 31, 2015 3,008 454 68 271 3,800 1 Share options and incentive plans include the shares and options granted to personnel which are not yet vested. Junior perpetual capital securities Coupon rate Coupon date, as of Year of 2017 2016 2015 USD 500 million 6.50% Quarterly, December 15 2018 424 424 424 USD 250 million floating LIBOR rate 1) Quarterly, December 15 2018 212 212 212 USD 500 million floating CMS rate 2) Quarterly, July 15 2018 402 402 402 USD 1 billion 6.375% Quarterly, June 15 2018 821 821 821 EUR 950 million floating DSL rate 3) Quarterly, July 15 2018 950 950 950 EUR 200 million 6.0% Annually, July 21 2018 200 200 200 At December 31 3,008 3,008 3,008 1 The coupon of the USD 250 million junior perpetual capital securities is reset each quarter based on the then prevailing three-month LIBOR yield plus a spread of 87.5 basis points, with a minimum of 4%. 2 The coupon of the USD 500 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year US dollar interest rate swap yield plus a spread of ten basis points, with a maximum of 8.5%. 3 The coupon of the EUR 950 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year Dutch government bond yield plus a spread of ten basis points, with a maximum of 8%. The interest rate exposure on some of these securities has been swapped to a three-month LIBOR and/or EURIBOR based yield. The securities have been issued at par. The securities have subordination provisions, rank junior to all other liabilities and senior to shareholders’ equity only. The conditions of the securities contain certain provisions for optional and required coupon payment deferral and mandatory coupon payment events. Although the securities have no stated maturity, Aegon has the right to call the securities for redemption at par for the first time on the coupon date in the years as specified, or on any coupon payment date thereafter. Perpetual cumulative subordinated Coupon rate Coupon date Year of next 2017 2016 2015 EUR 136 million 5.185% 1), 4) Annual, October 14 2018 136 136 136 EUR 203 million 4.260% 2), 4) Annual, March 4 2021 203 203 203 EUR 114 million 1.506% 3), 4) Annual, June 8 2025 114 114 114 At December 31 454 454 454 1 The coupon of the EUR 136 million bonds was originally set at 7.25% until October 14, 2008. Subsequently, the coupon has been reset at 5.185% until October 14, 2018. 2 The coupon of the EUR 203 million bonds was originally set at 7.125% until March 4, 2011. Subsequently, the coupon has been reset at 4.26% until March 4, 2021. 3 The coupon of the EUR 114 million bonds was originally set at 8% until June 8, 2005. Subsequently, the coupon has been reset at 4.156% until 2015 and 1.506% until 2025. 4 If the bonds are not called on the respective call dates and after consecutive period of ten years, the coupons will be reset at the then prevailing effective yield of ten-year Dutch government securities plus a spread of 85 basis points. The bonds have the same subordination provisions as dated subordinated debt. In addition, the conditions of the bonds contain provisions for interest deferral. Although the bonds have no stated maturity, Aegon has the right to call the bonds for redemption at par for the first time on the coupon date in the year of next call. Non-cumulative subordinated notes Coupon rate Coupon date Year of next 2017 2016 2015 USD 525 million 8% Quarterly, February 15 2018 271 271 271 At December 31 271 271 271 On February 7, 2012, Aegon issued USD 525 million in aggregate principal amount of 8.00% non-cumulative subordinated notes, due 2042, in an underwritten public offering in the United States registered with the US Securities and Exchange Commission. The subordinated notes bear interest at a fixed rate of 8.00% and have been priced at 100% of their principal amount. Any cancelled interest payments will not be cumulative. The securities are subordinated and rank senior to the junior perpetual capital securities, equally with the perpetual cumulative subordinated bonds and fixed floating subordinated notes, and junior to all other liabilities. The conditions of the securities contain certain provisions for optional and required cancellation of interest payments. The securities have a stated maturity of 30 years, however, Aegon has the right to call the securities for redemption at par on any coupon payment date. In 2017 Aegon had this right for the first time, but it was not exercised. These notes are recognized as a compound instrument due to the nature of this financial instrument. Compound instruments are separated into an equity component and a liability component. At December 31, 2017, the equity component amounted to EUR 271 million (2016: EUR 271 million), subordinated borrowings amounted to EUR 69 million (2016: EUR 72 million) and a deferred tax liability amounting to EUR 92 million (2016: EUR 106 million). Refer to note 34 Subordinated borrowings for details of the component classified as subordinated borrowings. Coupon rate Coupon date Year of next call 2017 2016 Fixed floating subordinated notes EUR 700 million 4% Annually, April 25 2024 695 695 Non-cumulative subordinated notes USD 525 million 8% Quarterly, February 15 2018 69 72 At December 31 764 767 On April 25, 2014, Aegon issued EUR 700 million of subordinated notes, first callable on April 25, 2024, and maturing on April 25, 2044. The coupon is fixed at 4% until the first call date and floating thereafter. Subordinated borrowings include a liability of EUR 69 million (2016: EUR 72 million) relating to the USD 525 million non-cumulative subordinated notes issued on February 7, 2012. The liability component of the non-cumulative subordinated notes is related to the redemption amount. For further information on the non-cumulative subordinated notes and their subordination refer to note 33 Other equity instruments. These securities are subordinated and rank senior to the junior perpetual capital securities, equally with the perpetual cumulative subordinated bonds and junior to all other liabilities. The conditions of the securities contain certain provisions for optional and required deferral of interest payments. There have been no defaults or breaches of conditions during the period. The fair value of these loans amounted to EUR 953 million (2016: EUR 844 million).
Aegon N.V [member]
Other equity instruments	14 Other equity instruments Junior Perpetual Share options Non-cumula- Total At January 1, 2017 3,008 454 65 271 3,797 Shares granted / Share options cost incurred - - 26 - 26 Shares vested / Share options forfeited - - (30 ) - (30 ) At December 31, 2017 3,008 454 61 271 3,794 At January 1, 2016 3,008 454 68 271 3,801 Shares granted / Share options cost incurred - - 13 - 13 Shares vested / Share options forfeited - - (16 ) - (16 ) At December 31, 2016 3,008 454 65 271 3,797 Junior perpetual capital securities Coupon rate Coupon date, as of Year of next 2017 2016 USD 500 million 6.50% Quarterly, December 15 2018 424 424 USD 250 million floating LIBOR 1) Quarterly, December 15 2018 212 212 USD 500 million floating CMS 2) Quarterly, July 15 2018 402 402 USD 1 billion 6.375% Quarterly, June 15 2018 821 821 EUR 950 million floating DSL 3) Quarterly, July 15 2018 950 950 EUR 200 million 6.0% Annually, July 2018 200 200 At December 31 3,008 3,008 1 The coupon of the USD 250 million junior perpetual capital securities is reset each quarter based on the then prevailing three-month LIBOR yield plus a spread of 87.5 basis points, with a minimum of 4%. 2 The coupon of the USD 500 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year US dollar interest rate swap yield plus a spread of ten basis points, with a maximum of 8.5%. 3 The coupon of the EUR 950 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year Dutch government bond yield plus a spread of ten basis points, with a maximum of 8%. The interest rate exposure on some of these securities has been swapped to a three-month LIBOR and/or EURIBOR based yield. The securities have been issued at par. The securities have subordination provisions, rank junior to all other liabilities and senior to shareholders’ equity only. The conditions of the securities contain certain provisions for optional and required coupon payment deferral and mandatory coupon payment events. Although the securities have no stated maturity, Aegon has the right to call the securities for redemption at par for the first time on the coupon date in the years as specified, or on any coupon payment date thereafter. Perpetual cumulative subordinated bonds Coupon rate Coupon date Year of next 2017 2016 EUR 136 million 5.185% 1), 4) Annual, October 14 2018 136 136 EUR 203 million 4.260% 2), 4) Annual, March 4 2021 203 203 EUR 114 million 1.506% 3), 4) Annual, June 8 2025 114 114 At December 31 454 454 1 The coupon of the EUR 136 million bonds was originally set at 7.25% until October 14, 2008. Subsequently, the coupon has been reset at 5.185% until October 14, 2018. 2 The coupon of the EUR 203 million bonds was originally set at 7.125% until March 4, 2011. Subsequently, the coupon has been reset at 4.26% until March 4, 2021. 3 The coupon of the EUR 114 million bonds was originally set at 8% until June 8, 2005. Subsequently, the coupon has been reset at 4.156% until 2015 and 1.506% until 2025. 4 If the bonds are not called on the respective call dates and after consecutive period of ten years, the coupons will be reset at the then prevailing effective yield of ten-year Dutch government securities plus a spread of 85 basis points. The bonds have the same subordination provisions as dated subordinated debt. In addition, the conditions of the bonds contain provisions for interest deferral. Although the bonds have no stated maturity, Aegon has the right to call the bonds for redemption at par for the first time on the coupon date in the year of next call. Non-cumulative subordinated notes Coupon Coupon date, Year of next 2017 2016 USD 525 million 8 % Quarterly, 2018 271 271 At December 31 271 271 On February 7, 2012, Aegon issued USD 525 million in aggregate principal amount of 8.00% non-cumulative subordinated notes, due 2042, in an underwritten public offering in the United States registered with the US Securities and Exchange Commission. The subordinated notes bear interest at a fixed rate of 8.00% and have been priced at 100% of their principal amount. Any cancelled interest payments will not be cumulative. The securities are subordinated and rank senior to the junior perpetual capital securities, equally with the perpetual cumulative subordinated bonds and fixed floating subordinated notes, and junior to all other liabilities. The conditions of the securities contain certain provisions for optional and required cancellation of interest payments. The securities have a stated maturity of 30 years, however, Aegon has the right to call the securities for redemption at par for the first time on the first coupon date in August 2017, or on any coupon payment date thereafter. These notes are recognized as a compound instrument due to the nature of this financial instrument. Compound instruments are separated into an equity component and a liability component. At December 31, 2017, the equity component amounted to EUR 271 million (2016: EUR 271 million), subordinated borrowings amounted to EUR 69 million (2016: EUR 72 million) and a deferred tax liability amounting to EUR 92 million (2016: EUR 106 million). Refer to note 15 Subordinated borrowings for details of the component classified as subordinated borrowings.

Subordinated borrowings

Subordinated borrowings	12 Months Ended
	Dec. 31, 2017
Subordinated borrowings	34 Subordinated borrowings Coupon rate Coupon date Year of next call 2017 2016 Fixed floating subordinated notes EUR 700 million 4% Annually, April 25 2024 695 695 Non-cumulative subordinated notes USD 525 million 8% Quarterly, February 15 2018 69 72 At December 31 764 767 On April 25, 2014, Aegon issued EUR 700 million of subordinated notes, first callable on April 25, 2024, and maturing on April 25, 2044. The coupon is fixed at 4% until the first call date and floating thereafter. Subordinated borrowings include a liability of EUR 69 million (2016: EUR 72 million) relating to the USD 525 million non-cumulative subordinated notes issued on February 7, 2012. The liability component of the non-cumulative subordinated notes is related to the redemption amount. For further information on the non-cumulative subordinated notes and their subordination refer to note 33 Other equity instruments. These securities are subordinated and rank senior to the junior perpetual capital securities, equally with the perpetual cumulative subordinated bonds and junior to all other liabilities. The conditions of the securities contain certain provisions for optional and required deferral of interest payments. There have been no defaults or breaches of conditions during the period. The fair value of these loans amounted to EUR 953 million (2016: EUR 844 million).
Aegon N.V [member]
Subordinated borrowings	15 Subordinated borrowings Coupon rate Coupon date Year of next call 2017 2016 Fixed floating subordinated notes EUR 700 million 4% Annually, April 25 2024 695 695 Non-cumulative subordinated notes USD 525 million 8% Quarterly, February 15 2018 69 72 At December 31 764 767 On April 25, 2014, Aegon issued EUR 700 million of subordinated notes, first callable on April 25, 2024, and maturing on April 25, 2044. The coupon is fixed at 4% until the first call date and floating thereafter. Subordinated borrowings include a liability of EUR 69 million (2016: EUR 72 million) relating to the USD 525 million non-cumulative subordinated notes issued on February 7, 2012. The liability component of the non-cumulative subordinated notes is related to the redemption amount. For further information on the non-cumulative subordinated notes and their subordination refer to note 14 Other equity instruments. These securities are subordinated and rank senior to the junior perpetual capital securities, equally with the perpetual cumulative subordinated bonds and junior to all other liabilities. The conditions of the securities contain certain provisions for optional and required deferral of interest payments. There have been no defaults or breaches of conditions during the period. The fair value of these loans amounted to EUR 953 million (2016: EUR 844 million).

Trust pass-through securities

Trust pass-through securities	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Trust pass-through securities	35 Trust pass-through securities Coupon rate Coupon date Year of issue Year of maturity Year of next call 2017 2016 USD 225 million 1) 7.65% Semi-annually, December 1 1996 2026 n.a. 91 109 USD 190 million 1) 7.625% Semi-annually, November 15 1997 2037 n.a. 41 47 At December 31 133 156 1 Issued by a subsidiary of, and guaranteed by Aegon N.V. Trust pass-through securities are securities through which the holder participates in a trust. The assets of these trusts consist of junior subordinated deferrable interest debentures issued by Transamerica Corporation. The trust pass-through securities carry provisions with regard to deferral of distributions for extension periods up to a maximum of 10 consecutive semi-annual periods. The trust pass-through securities are subordinated to all other unsubordinated borrowings and liabilities of Transamerica Corporation. There were no defaults or breaches of conditions during the period. The fair value of these loans amounted to EUR 137 million (2016: EUR 141 million).

Insurance contracts

Insurance contracts	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Insurance contracts	36 Insurance contracts 36.1 Underwriting risk Aegon’s earnings depend significantly upon the extent to which actual claims experience differs from the assumptions used in setting the prices for products and establishing the technical liabilities and liabilities for claims. To the extent that actual claims experience is less favorable than the underlying assumptions used in establishing such liabilities, income would be reduced. Furthermore, if these higher claims were part of a permanent trend, Aegon may be required to change best estimate assumptions for future claims which could increase liabilities, which could reduce income. In addition, certain acquisition costs related to the sale of new policies and the purchase of policies already in force have been recorded as assets on the statement of financial position and are being amortized into income over time. If the assumptions relating to the future profitability of these policies (such as future claims, investment income and expenses) are not realized, the amortization of these costs could be accelerated and may even require write offs should there be an expectation of unrecoverability. This could have a materially adverse effect on Aegon’s business, results of operations and financial condition. Sources of underwriting risk include policyholder behavior (such as lapses, surrender of policies or partial withdrawals), policy claims (such as mortality, longevity or morbidity) and expenses. For some product lines, Aegon is at risk if policy lapses increase as sometimes Aegon is unable to fully recover upfront expenses in selling a product despite the presence of commission recoveries or surrender charges and fees. There are also products where Aegon is at risk if lapses decrease, for example where this would result in a higher utilization rate of product guarantees. For mortality and morbidity risk, Aegon sells certain types of policies that are at risk if mortality or morbidity increases, such as term life insurance and accident insurance, and sells certain types of policies that are at risk if mortality decreases (longevity risk) such as annuity products. Aegon is also at risk if expenses are higher than assumed by management. Aegon monitors and manages its underwriting risk by underwriting risk type. Attribution analysis is performed on earnings and reserve movements in order to understand the source of any material variation in actual results from what was expected. Aegon’s units also perform experience studies for underwriting risk assumptions, comparing Aegon’s experience to industry experience as well as combining Aegon’s experience and industry experience based on the depth of the history of each source to Aegon’s underwriting assumptions. Where policy charges are flexible in products, Aegon uses these analyses as the basis for modifying these charges, with a view to maintain a balance between policyholder and shareholder interests. Aegon also has the ability to reduce expense levels over time, thus mitigating unfavorable expense variation. Sensitivity analysis of net income and shareholders’ equity to various underwriting risks is shown in the table that follows. Aegon’s best estimate assumptions already include expected future developments and the sensitivities represent an increase or decrease of lapse rates, mortality rates and morbidity rates, compared to Aegon’s best estimate assumptions. Increases in mortality rates lead to an increase in the level of benefits and claims. These underwriting sensitivities were run using a permanent shock applied to all of Aegon’s products, both products exposed to an increase and products exposed to a decrease in the rates. From the table below we can see that the mortality sensitivity has the largest impact and in aggregate, Aegon is exposed to a decrease in mortality rates. 2017 2016 Sensitivity analysis of net income and shareholders’ equity to changes in various underwriting risks Estimated approximate effect On shareholders’ On net income On shareholders’ On net income 20% increase in lapse rates 69 94 47 36 20% decrease in lapse rates (124 ) (155 ) (104 ) (91 ) 10% increase in mortality rates 514 91 548 153 10% decrease in mortality rates (1,011 ) (577 ) (1,039 ) (582 ) 10% increase in morbidity rates (492 ) (463 ) (521 ) (445 ) 10% decrease in morbidity rates 189 142 184 127 Aegon the Netherlands partially hedges the risk of future longevity increases in the Netherlands related to a part of its insurance liabilities. Over the past years Aegon the Netherlands has initiated a number of transactions to hedge this risk via both longevity index derivatives and reinsurance contracts. 36.2 Insurance contracts for general account 2017 2016 Life insurance 98,422 105,763 Non-life insurance - Unearned premiums and unexpired risks 5,447 5,822 - Outstanding claims 2,206 2,226 - Incurred but not reported claims 830 1,018 Incoming reinsurance 3,913 4,739 At December 31 110,818 119,569 2017 2016 Non-life insurance: - Accident and health insurance 8,225 8,821 - General insurance 259 245 Total non-life insurance 8,484 9,066 Movements during the year in life insurance: 2017 2016 At January 1 105,763 109,884 Acquisitions - 7 Disposals - (99 ) Portfolio transfers and acquisitions 139 97 Gross premium and deposits – existing and new business 6,498 6,356 Unwind of discount / interest credited 4,200 4,050 Insurance liabilities released (9,247 ) (10,033 ) Changes in valuation of expected future benefits (1,145 ) 820 Loss recognized as a result of liability adequacy testing 843 - Shadow accounting adjustments 92 2,053 Net exchange differences (8,598 ) 812 Transfer (to) / from reinsurance assets 23 - Transfer (to) / from insurance contracts for account of policyholders 135 1 Transfers to disposal groups 1) (239 ) (8,190 ) Other (43 ) 5 At December 31 98,422 105,763 1     Movements during the year in non-life insurance: 2017 2016 At January 1 9,066 8,616 Disposals - (334 ) Portfolio transfers and acquisitions 5 - Gross premiums – existing and new business 1,893 2,140 Unwind of discount / interest credited 444 426 Insurance liabilities released (1,065 ) (1,186 ) Changes in valuation of expected future claims 173 44 Change in unearned premiums (1,017 ) (1,093 ) Change in unexpired risks 3 2 Incurred related to current year 750 684 Incurred related to prior years 231 354 Release for claims settled current year (287 ) (253 ) Release for claims settled prior years (717 ) (843 ) Shadow accounting adjustments 76 289 Change in IBNR (79 ) (15 ) Net exchange differences (986 ) 242 Other (5 ) (5 ) At December 31 8,484 9,066 Movements during the year in incoming reinsurance: 2017 2016 At January 1 4,739 4,542 Gross premium and deposits – existing and new business 1,625 1,700 Unwind of discount / interest credited 175 179 Insurance liabilities released (2,005 ) (1,904 ) Change in unearned premiums 1 4 Changes in valuation of expected future benefits (57 ) 59 Shadow accounting adjustments (1 ) - Loss recognized as a result of liability adequacy (1 ) 9 Net exchange differences (558 ) 138 Other (4 ) 13 At December 31 3,913 4,739 36.3 Insurance contracts for account of policyholders Insurance contracts for account of policyholders 2017 2016 At January 1 120,929 112,679 Portfolio transfers and acquisitions (259 ) (353 ) Gross premium and deposits – existing and new business 12,144 12,931 Unwind of discount / interest credited 13,349 7,085 Insurance liabilities released (10,882 ) (8,206 ) Fund charges released (1,746 ) (1,725 ) Changes in valuation of expected future benefits 100 268 Transfer (to) / from insurance contracts (135 ) (1 ) Transfer (to) / from investment contracts for account of policyholders - (808 ) Transfers to disposal groups (1,359 ) (1,002 ) Net exchange differences (10,289 ) 55 Other 317 6 At December 31 122,168 120,929 Included in Transfers to disposal groups for 2017 is the sale of Aegon Ireland plc. business which is classified as held for sale per year-end 2017. As a result, the Insurance contracts for account of policyholders are no longer included in the 2017 ending balance. For 2016 the sale of Aegon UK’s annuity portfolio was included here. Refer to note 22 Assets and liabilities held for sale and note 51 Business combinations. Included in Other is the reclassification of the pension contract relating to the personnel of Unirobe Meeùs Groep (UMG) from defined benefit plans to insurance contracts for account of policy holders following the sale of UMG in November 2017.

Investment contracts

Investment contracts	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Investment contracts	37 Investment contracts 37.1 Investment contracts for general account Without discretionary With discretionary Total At January 1, 2017 19,217 355 19,572 Portfolio transfers and acquisitions 55 - 55 Deposits 8,432 - 8,432 Withdrawals (8,455 ) - (8,455 ) Investment contracts liabilities released - (64 ) (64 ) Interest credited 268 - 268 Net exchange differences (1,102 ) (13 ) (1,114 ) Transfer to/from other headings 21 - 21 Other (1,771 ) - (1,771 ) At December 31, 2017 16,665 278 16,943 At January 1, 2016 17,260 457 17,718 Portfolio transfers and acquisitions 105 - 105 Deposits 7,200 - 7,200 Withdrawals (6,059 ) - (6,059 ) Investment contracts liabilities released - (42 ) (42 ) Interest credited 267 - 267 Net exchange differences 294 (61 ) 233 Other 150 - 150 At December 31, 2016 19,217 355 19,572 The value of investment contracts for general account decreased in 2017 mainly due to a paydown of USD 2 billion to the Federal Home Loan Bank visible under “other” relating to advances on spread products, and due to net exchange differences. Investment contracts consist of the following: 2017 2016 Institutional guaranteed products 1,053 3,223 Fixed annuities 5,714 6,809 Savings accounts 9,568 8,814 Investment contracts with discretionary participation features 278 355 Other 331 371 At December 31 16,943 19,572 37.2 Investment contracts for account of policyholders Without discretionary With discretionary Total At January 1, 2017 42,803 41,971 84,774 Gross premium and deposits – existing and new business 5,393 1,313 6,706 Withdrawals (7,654 ) - (7,654 ) Interest credited 4,589 4,558 9,147 Investment contracts liabilities released - (9,006 ) (9,006 ) Fund charges released (176 ) - (176 ) Net exchange differences (4,272 ) (1,570 ) (5,842 ) Transfers to disposal groups (3,498 ) - (3,498 ) Other (16 ) - (16 ) At December 31, 2017 37,169 37,265 74,434 At January 1, 2016 40,365 49,754 90,119 Gross premium and deposits – existing and new business 6,553 1,724 8,277 Withdrawals (6,393 ) - (6,393 ) Interest credited 2,649 7,280 9,929 Investment contracts liabilities released - (10,841 ) (10,841 ) Fund charges released (209 ) - (209 ) Net exchange differences (12 ) (6,754 ) (6,767 ) Transfer (to) / from insurance contracts for account of policyholders - 808 808 Other (149 ) - (149 ) At December 31, 2016 42,803 41,971 84,774 Transfers to disposal groups relates to the Aegon Ireland plc. business which is classified as held for sale per year-end 2017. As a result, the investment contracts for account of policyholders are no longer included in the 2017 ending balance. Refer to note 22 Assets and liabilities held for sale and note 51 Business combinations.

Guarantees in insurance contrac

Guarantees in insurance contracts	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Guarantees in insurance contracts	38 Guarantees in insurance contracts For financial reporting purposes Aegon distinguishes between the following types of minimum guarantees: a. Financial guarantees: these guarantees are treated as bifurcated embedded derivatives, valued at fair value and presented as derivatives (note 2.9 and note 47 Fair value); b. Total return annuities: these guarantees are not bifurcated from their host contracts because they are presented and valued at fair value together with the underlying insurance contracts (note 2.19); c. Life contingent guarantees in the United States: these guarantees are not bifurcated from their host contracts, presented and valued in accordance with insurance accounting together with the underlying insurance contracts (note 2.19); and d. Minimum investment return guarantees in the Netherlands: these guarantees are not bifurcated from their host contracts, valued at fair value and presented together with the underlying insurance contracts (note 2.19 and note 47 Fair value). In addition to the guarantees mentioned above, Aegon has traditional life insurance contracts that include minimum guarantees that are not valued explicitly; however, the adequacy of all insurance liabilities, net of VOBA and DPAC, and including all guarantees, are assessed periodically (note 2.19). a. Financial guarantees In the United States and in the United Kingdom, a guaranteed minimum withdrawal benefit (GMWB) is offered directly on some variable annuity products Aegon issues and is also assumed from a ceding company. Additionally, Aegon offers guarantees on variable annuities sold through its joint venture in Japan. Variable annuities allow a customer to provide for the future on a tax-deferred basis and to participate in equity or bond market performance. Variable annuities allow a customer to select payout options designed to help meet the customer’s need for income upon maturity, including lump sum payment or income for life or for a period of time. This benefit guarantees that a policyholder can withdraw a certain percentage of the account value, starting at a certain age or duration, for either a fixed period or during the life of the policyholder. In the Netherlands, individual variable unit-linked products have a minimum benefit guarantee if premiums are invested in certain funds. The sum insured at maturity or upon the death of the beneficiary has a minimum guaranteed return (in the range of 3% to 4%) if the premium has been paid for a consecutive period of at least ten years and is invested in a mixed fund and/or fixed-income funds. No guarantees are given for equity investments only. The following table provides information on the liabilities for financial guarantees for minimum benefits, net of present value of the expected future premiums that are received to cover these guarantees: 2017 2016 United 1) The 2) United Total 3) United 1) The 2) United Total 3) At January 1 405 1,555 68 2,028 510 1,432 56 1,998 Incurred guarantee benefits 4) (114 ) (8 ) (37 ) (158 ) (113 ) 123 - 10 Paid guarantee benefits (1 ) - - (1 ) (1 ) - 12 11 Transfers to disposal groups - - (30 ) (30 ) - - - - Net exchange differences (42 ) - (2 ) (44 ) 10 - - 10 At December 31 247 1,547 - 1,794 405 1,555 68 2,028 Account value 5) 33,371 8,805 - 42,175 35,374 8,957 1,350 45,681 Net amount at risk 6) 94 1,737 - 1,831 222 1,972 68 2,262 1 Guaranteed minimum accumulation and withdrawal benefits. 2 Fund plan and unit-linked guarantees. 3 Balances are included in the derivatives liabilities on the face of the statement of financial position; refer to note 25 Derivatives. 4 Incurred guarantee benefits mainly comprise the effect of guarantees from new contracts, releases related to expired out-of-the-money guarantees and fair value movements during the reporting year. 5 Account value reflects the actual fund value for the policyholders. 6 The net amount at risk represents the sum of the positive differences between the discounted maximum amount payable under the guarantees and the account value. The decrease of incurred guarantee benefits mainly relates to equity markets rising, fair value movements due to increasing interest rates and tightening of treasury swaps spreads. Aegon Americas mitigates the exposure from the elective guaranteed minimum withdrawal benefit rider issued with a ceding company’s variable annuity contracts. The rider is essentially a return of premium guarantee, which is payable over a period of at least 14 years from the date that the policyholder elects to start withdrawals. At contract inception, the guaranteed remaining balance is equal to the premium payment. The periodic withdrawal is paid by the ceding company until the account value is insufficient to cover additional withdrawals. Once the account value is exhausted, Aegon pays the periodic withdrawals until the guaranteed remaining balance is exhausted. At December 31, 2017, the reinsured account value was 2.0 billion (2016: EUR 2.4 billion) and the guaranteed remaining balance was EUR 1.2 billion (2016: EUR 1.5 billion). The GMWB rider Aegon assumed from the ceding company is accounted for as a derivative and is carried in Aegon’s statement of financial position at fair value. At December 31, 2017, the contract had a value of EUR 34 million (2016: EUR 50 million). Aegon entered into a derivative program to mitigate the overall exposure to equity market and interest rate risks associated with the reinsurance contract. This program involves selling equity futures contracts and equity total return swap contracts (S&P 500, Midcap, Russell 2000, and the MCSI EAFE index in accordance with Aegon’s exposure) to mitigate the effect of equity market movement on the reinsurance contract and the purchase of interest rate swaps, treasury futures and treasury forwards to mitigate the effect of movements in interest rates on the reinsurance contracts. Aegon the Netherlands provides guarantees to its customers on expiry date for certain insurance contracts. In order to mitigate the risks related to the guarantees Aegon the Netherlands has setup a hedging program. Aegon the Netherlands does not use reinsurance in order to mitigate risks related to insurance contracts with a guarantee component. The net amount at risk represents the sum of the positive differences between the discounted maximum amount payable under the guarantees and the account value, which is the actual fund value of the policyholder. The guarantees in the United Kingdom relate to the Aegon Ireland plc. business which is classified as held for sale per year-end 2017 and as a result the guarantees are no longer included in the 2017 ending balance. b. Total return annuities Total Return Annuity (TRA) is an annuity product in the United States which provides customers with a pass-through of the total return on an underlying portfolio of investment securities (typically a mix of corporate and convertible bonds) subject to a cumulative minimum guarantee. Both the assets and liabilities are carried at fair value, however, due to the minimum guarantee not all of the changes in the market value of the asset will be offset in the valuation of the liability. This product exists for the fixed annuity line of business and represents a closed block. The fixed annuities product balance as of December 31, 2017, amounted to EUR 270 million (2016: EUR 328 million). c. Life contingent guarantees in the United States Certain variable insurance contracts in the United States also provide guaranteed minimum death benefits (GMDB) and guaranteed minimum income benefits (GMIB). Under a GMDB, the beneficiaries receive the greater of the account balance or the guaranteed amount upon the death of the insured. The net amount at risk for GMDB contracts is defined as the current GMDB in excess of the capital account balance at the reporting date. The GMIB feature provides for minimum payments if the contract holder elects to convert to an immediate payout annuity. The guaranteed amount is calculated using the total deposits made by the contract holder, less any withdrawals and sometimes includes a roll-up or step-up feature that increases the value of the guarantee with interest or with increases in the account value. The additional liability for guaranteed minimum benefits that are not bifurcated are determined each period by estimating the expected value of benefits in excess of the projected account balance and recognizing the excess over the accumulation period based on total expected assessments. The estimates are reviewed regularly and any resulting adjustment to the additional liability is recognized in the income statement. The benefits used in calculating the liabilities are based on the average benefits payable over a range of stochastic scenarios. Where applicable, the calculation of the liability incorporates a percentage of the potential annuitizations that may be elected by the contract holder. The following table provides information on the liabilities for guarantees for minimum benefits that are included in the valuation of the host contracts: 2017 2016 GMDB 1) GMIB 2) Total 4) GMDB 1) GMIB 2) Total 4) At January 1 531 849 1,381 544 816 1,359 Incurred guarantee benefits 5) (49 ) (121 ) (171 ) 48 83 130 Paid guarantee benefits (60 ) (26 ) (86 ) (75 ) (74 ) (148 ) Net exchange differences (58 ) (94 ) (153 ) 15 25 40 At December 31 364 608 972 531 849 1,381 GMDB 1) 3) GMIB 2) 3) GMDB 1) 3) GMIB 2) 3) Account value 6) 52,070 5,270 54,821 5,628 Net amount at risk 7) 1,309 474 2,615 684 Average attained age of contract holders 69 70 69 69 1 Guaranteed minimum death benefit in the United States. 2 Guaranteed minimum income benefit in the United States. 3 Note that the variable annuity contracts with guarantees may offer more than one type of guarantee in each contract; therefore, the amounts listed are not mutually exclusive. 4 Balances are included in the insurance liabilities on the face of the statement of financial position; refer to note 36 Insurance contracts. 5 Incurred guarantee benefits mainly comprise the effect of guarantees from new contracts, releases related to expired out-of-the-money guarantees and value changes as a consequence of interest movements during the reporting year. 6 Account value reflects the actual fund value for the policyholders. 7 The net amount at risk is defined as the present value of the minimum guaranteed annuity payments available to the contract holder determined in accordance with the terms of the contract in excess of the current account balance. d. Minimum investment return guarantees in the Netherlands The traditional life and pension products offered by Aegon in the Netherlands include various products that accumulate a cash value. Premiums are paid by customers at inception or over the term of the contract. The accumulation products pay benefits on the policy maturity date, subject to survival of the insured. In addition, most policies also pay death benefits if the insured dies during the term of the contract. The death benefits may be stipulated in the policy or depend on the gross premiums paid to date. Premiums and amounts insured are established at inception of the contract. The amount insured can be increased as a result of profit sharing, if provided for under the terms and conditions of the product. Minimum interest guarantees exist for all generations of traditional accumulation products written. Older generations contain a 4% guarantee; in 1999 the guarantee decreased to 3% and in 2013 the guarantee decreased to 0%. The traditional group pension contracts offered by Aegon in the Netherlands include large group insurance contracts that have an individually determined asset investment strategy underlying the pension contract. The guarantee given is that the profit sharing is the maximum of 0% and the realized return on an asset portfolio specified in the policy conditions, adjusted for technical interest rates ranging from 3% to 4%. If the adjusted return is negative, the 0% minimum is effective, but the loss in any given year is carried forward to be offset against any future surpluses within the contract period. In general, a guarantee is given for the life of the underlying employees so that their pension benefit is guaranteed. Large group contracts also share technical results (mortality risk and disability risk). The contract period is typically five years and the premiums are fixed over this period. These guarantees are valued at fair value and are included as part of insurance liabilities with the underlying host insurance contracts in note 36 Insurance contracts. The following table provides information on the liabilities for guarantees that are included in the valuation of the host contracts, net of the present value of the expected future premiums that are received to cover these guarantees: 2017 2016 GMI 1), 2) GMI 1), 2) At January 1 5,542 4,741 Incurred guarantee benefits 3) (823 ) 801 At December 31 4,719 5,542 Account value 4) 18,754 19,467 Net amount at risk 5) 4,440 5,017 1 Guaranteed minimum investment return in the Netherlands. 2 Balances are included in the insurance liabilities on the face of the statement of financial position; refer to note 36 Insurance contracts. 3 Incurred guarantee benefits mainly comprise the effect of guarantees from new contracts, releases related to expired out-of-the-money guarantees and fair value movements during the reporting year. 4 Account value reflects the liability value of the insurance contracts as a whole. 5 The net amount at risk represents the sum of the differences between the guaranteed and actual amount that is credited to the policyholders. For Individual policies only positive differences are included, for Group pensions contracts carry forwards of negative differences are recognized. Fair value measurement of guarantees in insurance contracts The fair values of guarantees mentioned above (with the exception of life contingent guarantees in the United States) are calculated as the present value of future expected payments to policyholders less the present value of assessed rider fees attributable to the guarantees. For further details refer to note 47 Fair value. For equity volatility, Aegon uses a term structure assumption with market-based implied volatility inputs for the first five years and a long-term forward rate assumption of 25% thereafter. The volume of observable option trading from which volatilities are derived generally declines as the contracts’ term increases, therefore, the volatility curve grades from implied volatilities for five years to the ultimate rate. The resulting volatility assumption in year 20 for the S&P 500 index (expressed as a spot rate) was 23.1% at December 31, 2017, and 24.0% at December 31, 2016. Correlations of market returns across underlying indices are based on historical market returns and their inter-relationships over a number of years preceding the valuation date. Assumptions regarding policyholder behavior, such as lapses, included in the models are derived in the same way as the assumptions used to measure insurance liabilities. These assumptions are reviewed at each valuation date, and updated based on historical experience and observable market data, including market transactions such as acquisitions and reinsurance transactions. Disclosure on interest rate risk, including interest rate risk sensitivity is included in note 4 Financial risks. Aegon utilizes different risk management strategies to mitigate the financial impact of the valuation of these guarantees on the results including asset and liability management and derivative hedging strategies to hedge certain aspects of the market risks embedded in these guarantees. Guarantees valued at fair value contributed a net loss before tax of EUR 75 million (2016: loss of EUR 61 million) to earnings. The main drivers of this loss before tax are a fair value loss on hedges related to the guarantee reserves of EUR 1.417 million (2016: EUR 325 million gain) and a loss of EUR 243 million related to increasing own credit spread (2016: EUR 404 million gain), partly offset by a gain of EUR 1.147 million related to a increase in equity markets (2016: EUR 671 million gain) positive results related to increases in risk free rates of EUR 169 million (2016: EUR 1.159 million loss) and DPAC offset, a gain of EUR 81 million related to decreases in equity volatilities (2016: EUR 7 million gain) and other contributed a gain of EUR 205 million (2016: EUR 279 million loss). Guarantee reserves decreased by EUR 1.121 million in 2017 (2016: increase of EUR 863 million).

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2017
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Borrowings	39 Borrowings 2017 2016 Capital funding 2,280 2,386 Operational funding 11,355 10,766 At December 31 13,635 13,153 Current 1,692 1,902 Non-current 11,943 11,251 Fair value of borrowings 14,035 13,545 Aegon’s borrowings are defined separately as capital funding and operational funding. Capital funding includes debt securities that are issued for general corporate purposes and for capitalizing its business units. Capital funding is part of the Company’s total capitalization that is used for financing its subsidiaries and the cash held at the holding company. Operational funding includes debt securities that are issued for financing of dedicated pools of assets. These assets are either legally segregated or tracked as separate portfolios. Capital funding On July 18, 2017 Aegon redeemed unsecured notes with a coupon of 3%, issued in 2012. The principal amount of EUR 500 million was repaid with accrued interest. On August 30, 2017 Aegon issued senior unsecured notes of EUR 500 million, due August 30, 2018. The notes were issued under Aegon’s USD 6 billion debt issuance program at a price of 100.157%, and will carry a coupon of 0.00%. A detailed composition of capital funding is included in the following table: (sorted at maturity) Coupon rate Coupon date Issue / 2017 2016 EUR 500 million Unsecured Notes 3% July 18 2012 / 17 - 500 EUR 500 million Unsecured Notes 0% August 30 2017 / 18 500 - EUR 75 million Medium-Term Notes 1) 4.625% December 9 2004 / 19 82 84 USD 500 million Senior Notes 1), 2) 5.75% Semi-annually 2005 / 20 455 526 EUR 500 million Senior Unsecured Notes 1.00% December 8 2016 / 23 495 495 GBP 250 million Medium-Term Notes 6.125% December 15 1999 / 31 279 291 GBP 400 million Senior Unsecured Notes 6.625% Semi-annually 2009 / 39 445 462 Other 24 28 At December 31 2,280 2,386 1 Measured at fair value. 2 Issued by subsidiaries of, and guaranteed by, Aegon N.V. These loans are considered senior debt in calculating financial leverage in note 46 Capital management and solvency. Operational funding During 2017, the operational funding increased EUR 0.6 billion due to new FHLB advances of EUR 1.3 billion and two covered bond issuances in the Netherlands of EUR 0.5 billion in June and November 2017. This was partly offset by the redemption of Seacure 12 in the Netherlands of EUR 1.0 billion and the redemption of operational funding of EUR 0.4 billion supporting a captive insurance company, which was dissolved following the divestment of a block of life reinsurance business in the Americas. Next to this there was a decrease of EUR 0.5 billion as result of foreign exchange impacts on the US dollar positions as a result of the strengthening of the euro. During 2016, Aegon redeemed EUR 450 million of ECB LTRO, EUR 225 million of ECB MRO, EUR 737 million of regular borrowings and repurchased the mortgage loans from SAECURE 9 and SAECURE 10 for EUR 1,658 million. In addition, Aegon entered into a USD 3 billion new liquidity program from the Federal Home Loan Bank and issued a EUR 500 million covered bond. Coupon rate Coupon date Issue / 2017 2016 Revolving Loan Facility Warehouse Mortgage Loans 1) Floating Monthly - / 2018-20 729 423 EUR 1,365 million “SAECURE 12” RMBS Note 1), 2) Floating Quarterly 2012 / 17 - 1,030 EUR 1,123 million “SAECURE 13” RMBS Note 1), 3) Floating Quarterly 2013 / 18 750 862 EUR 1,367 million “SAECURE 14” RMBS Note 1), 4) Floating Quarterly 2014 / 19 994 1,126 EUR 1,443 million “SAECURE 15” RMBS Note 1), 5) Floating Quarterly 2014 / 20 1,164 1,284 EUR 750 million Conditional Pass-Through Covered Bond 1), 6) 0.267% Annual 2015 / 20 747 747 EUR 500 million Conditional Pass-Through Covered Bond 1), 7) 0.250% Annual 2016 / 23 496 495 EUR 500 million Conditional Pass-Through Covered Bond 1), 8) 0.750% Annual 2017 / 27 486 - EUR 500 million Conditional Pass-Through Covered Bond 1), 9) 0.375% Annual 2017 / 24 497 - USD 1.54 billion Variable Funding Surplus Note 10), 11) Floating Quarterly 2006 / 36 1,322 1,505 USD 550 million Floating Rate Guaranteed Note 10), 12) Floating Quarterly 2007 / 37 - 450 FHLB Secured borrowings 1) Floating Quarterly 2016 / 46 4,160 2,839 Other 10 3 At December 31 11,355 10,766 1 2 3 4 5 6 7 8 9 10 11   12   Other Included in borrowings is EUR 536 million relating to borrowings measured at fair value (2016: EUR 610 million). For the year 2017, Aegon’s credit spread had a negative impact of EUR 15 million on income before tax (2016: negative impact of EUR 1 million) and a negative impact of EUR 10 million on shareholders’ equity (2016: negative impact of EUR 1 million). The cumulative negative impact of Aegon’s credit spread for borrowings in portfolio at year-end, based on observable market data, on income before tax amounted to EUR 27 million (2016: EUR 12 million). The difference between the contractually required payment at maturity date and the carrying amount of the borrowings amounted to EUR 9 million (2016: EUR 39 million).                            Undrawn committed borrowing facilities: 2017 2016 Floating-rate - Expiring within one year 197 463 - Expiring beyond one year 3,170 3,422 At December 31 3,367 3,885 There were no defaults or breaches of conditions during the period.

Provisions

Provisions	12 Months Ended
	Dec. 31, 2017
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Provisions	40 Provisions 2017 2016 At January 1 173 175 Additional provisions 107 92 Disposals (72 ) (33 ) Unused amounts reversed through the income statement - (3 ) Used during the year 12 (55 ) Net exchange differences (9 ) (3 ) At December 31 210 173 Current 151 88 Non-current 60 85 The remaining provisions mainly consist of litigation provisions of EUR 92 million (2016: EUR 11 million) including EUR 85 million in anticipation of a possible settlement in connection with an investigation by the SEC, refer to Note 48 Commitments and contingencies, restructuring provisions of EUR 27 million (2016: EUR 39 million), provisions regarding fees payable upon purchase and surrender of unit-linked policies in the Polish Life Insurance portfolio of EUR 20 million (2016: EUR 24 million) and other provisions of EUR 71 million (2016: EUR 74 million) including the remaining provision related to the harbor workers’ former pension fund Optas. The provision for unearned commission decreased to EUR 0 million (2016: EUR 25 million) due to the sale of Unirobe Meeùs Groep.

Defined benefit plans

Defined benefit plans	12 Months Ended
	Dec. 31, 2017
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Defined benefit plans	41 Defined benefit plans 2017 2016 Retirement benefit plans 3,657 4,453 Other post-employment benefit plans 293 314 Total defined benefit plans 3,950 4,767 Retirement benefit plans in surplus 55 51 Other post-employment benefit plans in surplus - - Total defined benefit assets 55 51 Retirement benefit plans in deficit 3,712 4,503 Other post-employment benefit plans in deficit 293 314 Total defined benefit liabilities 4,005 4,817 2017 2016 Movements during the year in defined benefit plans Retirement Other post- Total Retirement Other post- Total At January 1 4,453 314 4,767 4,135 296 4,430 Defined benefit expenses 242 19 262 302 22 324 Remeasurements of defined benefit plans (233 ) 10 (224 ) 388 5 392 Acquisition of subsidiary - - - - 3 3 Contributions paid (163 ) - (163 ) (250 ) - (250 ) Benefits paid (108 ) (19 ) (128 ) (106 ) (18 ) (125 ) Net exchange differences (133 ) (31 ) (164 ) (15 ) 7 (8 ) Other (400 ) - (400 ) - - - At December 31 3,657 293 3,950 4,453 314 4,767 Other reflects the reclassification of the pension contract relating to the personnel of Unirobe Meeùs Groep (UMG) from defined benefit plans to insurance contracts for account of policyholders following the sale of UMG in November 2017. The amounts recognized in the statement of financial position are determined as follows: 2017 2016 Retirement Other post- Total Retirement Other post- Total Present value of wholly or partly funded obligations 4,389 - 4,389 4,834 - 4,834 Fair value of plan assets (3,622 ) - (3,622 ) (3,793 ) - (3,793 ) 767 - 767 1,041 - 1,041 Present value of wholly unfunded obligations 1) 2,890 293 3,183 3,412 314 3,726 At December 31 3,657 293 3,950 4,453 314 4,767 1 The fair value of Aegon’s own transferable financial instruments included in plan assets and the fair value of other assets used by Aegon included in plan assets was nil in both 2017 and 2016.   2017 2016 Defined benefit expenses Retirement Other post- Total Retirement Other post- Total Current year service cost 148 11 158 127 13 140 Net interest on the net defined benefit liability (asset) 99 10 109 123 11 134 Past service cost (5 ) (1 ) (6 ) 53 (2 ) 50 Total defined benefit expenses 242 19 262 302 22 324 2015 Retirement Other post- Total Current year service cost 134 10 144 Net interest on the net defined benefit liability (asset) 119 10 129 Past service cost (7 ) 20 13 Total defined benefit expenses 246 40 286 Defined benefit expenses are included in ‘Commissions and expenses’ in the income statement. Movements during the year of the present value of the defined benefit obligations 2017 2016 At January 1 8,560 8,000 Acquisition of subsidiary - 3 Current year service cost 158 140 Interest expense 230 267 Remeasurements of the defined benefit obligations: - Actuarial gains and losses arising from changes in demographic assumptions 30 (211 ) - Actuarial gains and losses arising from changes in financial assumptions 29 894 Past service cost (6 ) 50 Contributions by plan participants 12 11 Benefits paid (523 ) (461 ) Net exchange differences (519 ) (133 ) Other (400 ) - At December 31 7,572 8,560 Movements during the year in plan assets for retirement benefit plans 2017 2016 At January 1 3,793 3,569 Interest income (based on discount rate) 121 134 Remeasurements of the net defined liability (asset) 283 290 Contributions by employer 175 261 Benefits paid (396 ) (336 ) Net exchange differences (355 ) (125 ) At December 31 3,622 3,793 2017 2016 Breakdown of plan assets for retirement benefit plans Quoted Unquoted Total in % of Quoted Unquoted Total in % of Equity instruments 127 4 131 4% 206 14 219 6% Debt instrument 397 411 809 22% 570 713 1,283 34% Derivatives - 254 254 7% - 179 179 5% Investment funds 5 2,027 2,032 56% 4 1,701 1,705 45% Structured securities - - - 0% - 3 3 0% Other 25 372 397 11% 12 392 405 11% At December 31 554 3,068 3,622 100% 792 3,001 3,793 100% Defined benefit plans are mainly operated by Aegon USA, Aegon the Netherlands and Aegon UK. The following sections contain a general description of the plans in each of these subsidiaries and a summary of the principal actuarial assumptions applied in determining the value of defined benefit plans. Aegon USA Aegon USA has defined benefit plans covering substantially all its employees that are qualified under the Internal Revenue Service Code, including all requirements for minimum funding levels. The defined benefit plans are governed by the Board of Managers of Transamerica Corporation. The Board of Managers has the full power and discretion to administer the plan and to apply all of its provisions, including such responsibilities as, but not limited to, developing the investment policy and managing assets for the plan, maintaining required funding levels for the plan, deciding questions related to eligibility and benefit amounts, resolving disputes that may arise from plan participants and for complying with the plan provisions, and legal requirements related to the plan and its operation. The benefits are based on years of service and the employee’s eligible annual compensation. The plans provide benefits based on a traditional final average formula or a cash balance formula (which defines the accrued benefit in terms of a stated account balance), depending on the age and service of the plan participant. The defined benefit plans have a deficit of EUR 629 million at December 31, 2017 (2016: EUR 742 million deficit). Investment strategies are established based on asset and liability studies by actuaries which are updated as they consider appropriate. These studies, along with the investment policy, assist to develop the appropriate investment criteria for the plan, including asset allocation mix, return objectives, investment risk and time horizon, benchmarks and performance standards, and restrictions and prohibitions. The overall goal is to maximize total investment returns to provide sufficient funding for the present and anticipated future benefit obligations within the constraints of a prudent level of portfolio risk and diversification. Aegon believes that the asset allocation is an important factor in determining the long-term performance of the plan. The plan uses multiple asset classes as well as sub-classes to meet the asset allocation and other requirements of the investment policy, which minimizes investment risk. From time to time the actual asset allocation may deviate from the desired asset allocation ranges due to different market performance among the various asset categories. If it is determined that rebalancing is required, future additions and withdrawals will be used to bring the allocation to the desired level. Aegon USA maintains minimum required funding levels as set forth by the Internal Revenue Code. If contributions are required, the funding would be provided from the Company’s general account assets. Pension plan contributions were not required for Aegon USA in 2017 or 2016. However, with the Aegon N.V. Management Board approval of a proposal from Transamerica Corporation, Transamerica Corporation made a pension plan contribution of EUR 89 million in September 2017 (EUR 226 million in September 2016) that was over and above the minimum required funding levels as set forth by the Internal Revenue Code. Aegon USA also sponsors supplemental retirement plans to provide senior management with benefits in excess of normal retirement benefits. The plans are unfunded and are not qualified under the Internal Revenue Code. The supplemental retirement plans are governed by either Transamerica Corporation, or the Compensation Committee of the Board of Directors of Transamerica Corporation. Transamerica Corporation, or the Compensation Committee of the Board of Directors has the full power and discretion to apply all of the plan’s provisions, including such responsibilities as, but not limited to, interpret the plan provisions, to make factual determinations under the plan, to determine plan benefits, and to comply with any statutory reporting and disclosure requirements. The benefits are based on years of service and the employee’s eligible annual compensation. The plans provide benefits based on a traditional final average formula or a cash balance formula (which defines the accrued benefit in terms of a stated account balance), depending on the age and service of the plan participant. The company funds the benefit payments of the supplemental retirement plans from its general account assets. The unfunded amount related to these plans, for which a liability has been recorded, was EUR 257 million (2016: EUR 286 million unfunded). Aegon USA provides health care benefits to retired employees through continuation of coverage in self funded plans, which are classified as unfunded per IAS 19 financial guidance. The postretirement health care benefits under the Plans are administered by Transamerica Corporation, which has delegated the claims administration to third-party administrators. Aegon USA maintains two plans which provide continuation of coverage for retiree medical benefits. For each plan, Aegon USA has the fiduciary responsibility to administer the plan in accordance with its terms, and decides questions related to eligibility and determines plan provisions and benefit amounts. Under the Employee Retirement Income Security Act (ERISA), Aegon USA has the fiduciary responsibility to monitor the quality of services provided by the third-party claims administrator and to replace the third-party administrator if needed. In addition, Aegon USA has the fiduciary obligation to interpret the provisions of the plans, and to comply with any statutory reporting and disclosure requirements. Finally, Aegon USA reviews the terms of the plans and makes changes to the plans if and when appropriate. Aegon USA funds the benefit payments of the post-retirement health care plans from its general account assets. The post-retirement health benefit liability amounted to EUR 227 million (2016: EUR 246 million). The weighted average duration of the defined benefit obligation is 13.2 years (2016: 13.3 years). The principal actuarial assumptions that apply for the year ended December 31 are as follows: Actuarial assumptions used to determine defined benefit obligations at year-end 2017 2016 Demographic actuarial assumptions Mortality US mortality table 1) US mortality table 2) Financial actuarial assumptions Discount rate 3.55% 4.10% Salary increase rate 3.85% 3.87% Health care trend rate 7.40% 7.25% 1 U.S. Society of Actuaries RP2014 mortality table with Scale MP2017. 2 U.S. Society of Actuaries RP2014 mortality table with Scale MP2016. The principal actuarial assumptions have an effect on the amounts reported for the defined benefit obligation. A change as indicated in the table below in the principal actuarial assumptions would have the following effects on the defined benefit obligation per year-end: Estimated approximate effects on the defined benefit obligation 2017 2016 Demographic actuarial assumptions 10% increase in mortality rates (76 ) (77 ) 10% decrease in mortality rates 83 84 Financial actuarial assumptions 100 basis points increase in discount rate (402 ) (440 ) 100 basis points decrease in discount rate 498 546 100 basis points increase in salary increase rate 38 42 100 basis points decrease in salary increase rate (33 ) (37 ) 100 basis points increase in health care trend rate 15 16 100 basis points decrease in health care trend rate (13 ) (14 ) The above sensitivity analysis is based on a change in an assumption while holding all other assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. When calculating the sensitivity of the defined benefit obligation to significant actuarial assumptions the same method (present value of the defined benefit obligation calculated with the projected unit credit method at the end of the reporting period) has been applied as when calculating the pension liability recognized within the statement of financial position. Target allocation of plan assets for retirement benefit plans for the next annual period is: Equity instruments 22-30% Debt instruments 42-53% Other 22-31% Aegon the Netherlands Aegon Nederland has a number of defined benefit plans and a small number of defined contribution plans. The defined benefit plans are subject to Dutch Pension regulations and governed by the Board of Directors of Aegon Nederland. The Board of Directors has the full power and discretion to administer the plan including developing investment policy and managing assets for the plans (although these assets do not qualify as ‘plan assets’ as defined by IFRS), deciding questions related to eligibility and benefit amounts, and any disputes that may arise from plan participants and for complying with the plan provisions, and legal requirements related to the plan and its operation. Aegon Nederland runs, in principle, full actuarial and investment risk regarding the defined benefit plans. This includes the risks of low interest rates, low returns and increased longevity. A part of this risk can be attributed to plan participants by lowering indexation or by increasing employee contributions. Furthermore, the specific statutory requirements governing the administration of group pension schemes have been laid down in the Pension Act (Pensioenwet / Pw). Insurers are subject to prudential supervision pursuant to the Financial Supervision Act (Wet op het financieel toezicht / Wft). Investment strategies are established based on asset and liability studies. The overall goal is to maximize total investment returns to provide sufficient funding for the present and anticipated future benefit obligations within the constraints of a prudent level of portfolio risk. These studies use for example return objectives and various investment instruments. Investment restrictions are updated regularly and they result in asset allocation mix and hedges. The contributions to the retirement benefit plan of Aegon Nederland are paid by both the employees and the employer, with the employer contribution being variable 1 As a consequence of the sale of UMG to Aon Groep Nederland during 2017, the defined benefit obligation (DBO) and the assets backing the DBO related to UMG have been derecognized. This resulted in a decrease of the ‘DBO’ and ‘insurance contracts for general account’ of EUR 478 million. On the other hand, the pension contract between UMG and Aegon Levensverzekering N.V. is no longer 1 Aegon Nederland deducts employee contributions from the total pension expenses. eliminated. This resulted in an increase of the ‘insurance contracts for risk of policy holders’ and ‘investments for account of policy holders’ of EUR 442 million. Aegon Nederland also has a post-retirement medical plan that contributes to the health care coverage of employees and beneficiaries after retirement. For this plan, Aegon Nederland has the responsibility to administer the plan in accordance with its terms, and decides on questions related to eligibility and determines plan provisions and benefit amounts. In addition, Aegon Nederland has the obligation to interpret the provisions of the plans, and to comply with any statutory reporting and disclosure requirements. Finally, Aegon Nederland reviews the terms of the plans and makes changes to the plans if and when appropriate. The liabilities related to these other post-employment benefit plans are fully unfunded and amount to EUR 65 million at December 31, 2017 (2016: EUR 68 million). The weighted average duration of the other post-employment benefit plans is 11.9 years (2016: 10.8 years). Plan amendments The minimum tax-qualified retirement age for occupational retirement plans in the Netherlands is triggered by an increase in average life expectancy as determined by the Central Bureau of Statistics. Effective January 1, 2018, the tax-qualified retirement age in combination with the maximum annual benefit accrual of 1.875% becomes 68. As a result Aegon has changed the retirement age of its pension plan from 67 to 68 years as from January 1, 2018. The principal actuarial assumptions that apply for the year-ended December 31 are as follows: Actuarial assumptions used to determine defined benefit obligations at year-end 2017 2016 Demographic actuarial assumptions Mortality NL mortality table 1) NL mortality table 2) Financial actuarial assumptions Discount rate 2.09% 1.79% Salary increase rate 3) Curve 2017 Curve 2016 Indexation 3) 44.10% of Curve 2017 45.20% of Curve 2016 1 2 3 The principal actuarial assumptions have an effect on the amounts reported for the defined benefit obligation. A change as indicated in the table below in the principal actuarial assumptions of the retirement benefit plan would have the following effects per year-end:       Estimated approximate effects on the defined benefit obligation 2017 2016 Demographic actuarial assumptions 10% increase in mortality rates (69 ) (83 ) 10% decrease in mortality rates 77 94 Financial actuarial assumptions 100 basis points increase in discount rate (447 ) (545 ) 100 basis points decrease in discount rate 605 732 100 basis points increase in salary increase rate 4 19 100 basis points decrease in salary increase rate (4 ) (19 ) 25 basis points increase in indexation 140 170 25 basis points decrease in indexation (128 ) (158 ) The above sensitivity analysis is based on a change in one assumption while holding all other assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. When calculating the sensitivity of the defined benefit obligation to significant actuarial assumptions the same method (present value of the defined benefit obligation calculated with the projected unit credit method at the end of the reporting period) has been applied as when calculating the defined benefit obligation recognized within the statement of financial position. Aegon UK Aegon UK operated a defined benefit pension scheme providing benefits for staff based on final pensionable salary and years of service. The scheme closed to new entrants a number of years ago and closed to future accrual on March 31, 2013. Aegon UK now offers a defined contribution pension scheme to all employees. The pension scheme is administered separately from Aegon UK and is governed by Trustees, who are required to act in the best interests of the pension scheme members. The pension scheme Trustees are required to carry out triennial valuations on the scheme’s funding position, with the latest valuation being as at March 31, 2016. As part of this triennial valuation process, a schedule of contributions is agreed between the Trustees and Aegon UK in accordance with UK pensions legislation and guidance issued by the Pensions Regulator in the UK. The schedule of contributions includes deficit reduction contributions to clear any scheme deficit. Under IAS 19, the defined benefit plan has a deficit of EUR 137 million at December 31, 2017 (2016: EUR 298 million deficit). The investment strategy for the scheme is determined by the trustees in consultation with Aegon UK. Currently 40% of assets are invested in growth assets (i.e. primarily equities) and 60% are liability driven investments where the investments are a portfolio of fixed interest and inflation-linked bonds and related derivatives, selected to broadly match the interest rate and inflation profile of liabilities. Under the scheme rules, pensions in payment increase in line with the UK Retail Price Index, and deferred benefits increase in line with the UK Consumer Price Index. The pension scheme is therefore exposed to UK inflation changes as well as interest rate risks, investment returns and changes in the life expectancy of pensioners. The weighted average duration of the defined benefit obligation is 23.1 years (2016: 23.0 years). The principal actuarial assumptions that apply for the year ended December 31 are as follows: Actuarial assumptions used to determine defined benefit obligations at year-end 2017 2016 Demographic actuarial assumptions Mortality UK mortality table 1) UK mortality table 1) Financial actuarial assumptions Discount rate 2.56% 2.69% Price inflation 3.29% 3.37% 1 The principal actuarial assumptions have an effect on the amounts reported for the defined benefit obligation. A change as indicated in the table below in the principal actuarial assumptions would have the following effects on the defined benefit obligation per year-end:   Estimated approximate effects on the defined benefit obligation 2017 2016 Demographic actuarial assumptions 10% increase in mortality rates (44 ) (51 ) 10% decrease in mortality rates 50 58 Financial actuarial assumptions 100 basis points increase in discount rate (299 ) (371 ) 100 basis points decrease in discount rate 412 513 100 basis points increase in price inflation 169 213 100 basis points decrease in price inflation (248 ) (289 ) The above sensitivity analysis is based on a change in an assumption while holding all other assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. When calculating the sensitivity of the defined benefit obligation to significant actuarial assumptions the same method (present value of the defined benefit obligation calculated with the projected unit credit method at the end of the reporting period) has been applied as when calculating the pension liability recognized within the statement of financial position. Target allocation of plan assets for retirement Equity instruments 29% Debt instruments 71% All other operating segments Businesses included in all other operating segments mostly operate defined contribution plans.

Deferred gains

Deferred gains	12 Months Ended
	Dec. 31, 2017
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Deferred gains	42 Deferred gains 2017 2016 At January 1 64 112 Income deferred 1 4 Disposals - (31 ) Release to income statement (5 ) (6 ) Net exchange differences (2 ) (14 ) Transfers to disposal groups (45 ) - At December 31 13 64 Transfers to disposal groups relates to the Aegon Ireland plc. business which is classified as held for sale per year-end 2017 and as a result the deferred gains are no longer included in the 2017 ending balance.

Deferred tax

Deferred tax	12 Months Ended
	Dec. 31, 2017
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Deferred tax	43 Deferred tax 2017 2016 Deferred tax assets 79 87 Deferred tax liabilities 1,029 2,201 Total net deferred tax liability / (asset) 950 2,113 Deferred tax assets comprise temporary differences on: 2017 2016 Financial assets (20 ) (22 ) Insurance and investment contracts (19 ) (55 ) Deferred expenses, VOBA and other intangible assets (140 ) (148 ) Defined benefit plans 26 54 Losses 176 221 Other 57 37 At December 31 79 87 Deferred tax liabilities comprise temporary differences on: 2017 2016 Real estate 554 541 Financial assets 1,724 3,143 Insurance and investment contracts (1,806 ) (3,042 ) Deferred expenses, VOBA and other intangible assets 1,752 3,150 Defined benefit plans (268 ) (592 ) Losses (120 ) (188 ) Other (807 ) (812 ) At December 31 1,029 2,201 The following table provides a movement schedule of net deferred tax broken-down by those items for which a deferred tax asset or liability has been recognized. LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO At January 1, 2017 541 3,165 (2,988 ) 3,298 (645 ) (407 ) (850 ) 2,113 Acquisitions / Additions - - - 9 - (1 ) (14 ) (6 ) Charged to income statement 37 32 609 (1,016 ) 120 78 (62 ) (202 ) Charged to equity (9 ) (874 ) - - 174 - (5 ) (715 ) Net exchange differences (16 ) (270 ) 241 (322 ) 57 27 111 (172 ) Disposal of a business - - - 2 - - - 2 Transfers to disposal groups - - - - - 8 - 8 Transfer to current income tax - - - - - - (73 ) (73 ) Transfer to/from other headings - (300 ) 351 (79 ) - - 27 - Other - (9 ) - - - - 2 (7 ) At December 31, 2017 554 1,744 (1,787 ) 1,892 (295 ) (296 ) (863 ) 950 At January 1, 2016 434 2,735 (2,500 ) 3,008 (688 ) (500 ) (261 ) 2,227 Charged to income statement 99 596 (380 ) 222 135 57 (543 ) 185 Charged to equity 3 (264 ) (2 ) 2 (85 ) - (2 ) (350 ) Net exchange differences 5 84 (108 ) 69 (6 ) 34 (45 ) 34 Transfer to current income tax - 16 - - - - - 16 Other - (1 ) 2 (3 ) (1 ) 1 3 - At December 31, 2016 541 3,165 (2,988 ) 3,298 (645 ) (409 ) (849 ) 2,113 The decrease of the United States corporate income tax rate from 35% to 21% as from January 1, 2018 with an impact of total EUR 1,034 million, EUR 554 million through profit and loss and EUR 479 million through other comprehensive income (refer to note 18) is the main cause for the total decrease in the deferred tax liability in 2017 of EUR 1,163 million. The transfer to current income tax relates to transfers from deferred to current tax, in relation to own equity instruments. Transfer to/from other headings in 2017 includes transfers between two reporting segments. In 2016, there were considerable movements in the net deferred tax schedule. The major components consisted of: ◆ The increase of deferred tax liability primarily related to an increase of unrealised profits in respect of financial assets mainly driven by tightening credit spread ◆ The movement in Insurance contracts and Intangible assets mainly related to the reclassification through these categories ◆ The increase in Other mainly related to the deferral tax credits in 2016 Deferred corporate income tax assets are recognized for tax losses carried forward to the extent that the realization of the related tax benefit through future taxable profits is probable. For an amount of gross EUR 85 million; tax EUR 15 million (2016: gross EUR 505 million; tax EUR 90 million) the realization of the deferred tax asset is dependent on the projection of future taxable profits from existing business in excess of the profits arising from the reversal of existing taxable temporary differences. For the following amounts, arranged by loss carry forward periods, the deferred corporate income tax asset is not recognized: Gross amounts 1) Not recognized deferred tax assets 2017 2016 2017 2016 < 5 years 89 101 22 26 > 137 130 18 16 > - 1 25 33 > - - - - Indefinitely 499 396 111 94 At December 31 725 628 177 170 1 The gross value of state tax loss carry forward is not summarized in the disclosure, due to the fact that the United States files in different state jurisdictions with various applicable tax rates and apportionment rules Deferred corporate income tax assets in respect of deductible temporary differences are recognized to the extent that the realization of the related tax benefit through future taxable profits is probable. For the following amounts relating to Defined benefit plans and Other items the recognition of the deferred corporate income tax asset is dependent on future taxable profits in excess of the profits arising from the reversal of existing taxable temporary differences: Gross amounts Deferred tax assets 2017 2016 2017 2016 Deferred corporate income tax asset dependent on retaining bonds and similar investments until the earlier of market recovery or maturity 1) - 816 - 286 Deferred corporate income tax asset dependent on future taxable profits 261 362 46 64 At December 31 261 1,179 46 350 1 The amendment of IAS 12, relating to deferred tax assets on unrealized losses, changed the qualification by Aegon of ‘holding bonds and similar investments until the earlier of market recovery or maturity’ from a tax planning opportunity into a source of income with no impact on the figures presented. Aegon did not recognize deferred corporate income tax assets in respect of deductible temporary differences relating to Financial assets and Other items for the amount of gross EUR 43 million; tax EUR 8 million (2016: gross EUR 70 million; tax EUR 13 million). Deferred corporate income tax liabilities have not been recognized for withholding tax and other taxes that would be payable on the unremitted earnings of certain subsidiaries. The unremitted earnings totaled gross EUR 1,771 million; tax EUR 441 million (2016: gross EUR 1,770 million; tax EUR 441 million). All deferred corporate income taxes are non-current by nature.

Other liabilities

Other liabilities	12 Months Ended
	Dec. 31, 2017
Other liabilities	44 Other liabilities 2017 2016 1) Payables due to policyholders 1,184 1,337 Payables due to brokers and agents 385 428 Payables out of reinsurance 3,010 2,443 Social security and taxes payable 125 125 Investment creditors 1,228 1,437 Cash collateral on derivative transactions 2,335 2,841 Cash collateral on securities lended 3,277 3,633 Cash collateral - other 43 50 Repurchase agreements 1,373 1,489 Commercial paper 72 128 Bank overdrafts 2 1 Other creditors 2,174 3,067 At December 31 15,208 16,978 Current 14,992 16,101 Non-current 216 877 1 Certain amounts within Other liabilities in 2016 have been reclassified to conform to the current year presentation as certain accounts were previously not mapped correctly to the line items disclosed in this note. These reclassifications are not considered material as these reclassifications had no effect on net income, shareholders’ equity and earnings per share, nor on the total of other liabilities of EUR 16,978 reported in 2016. Reclassifications affected all items, except for Commercial paper and Bank overdrafts. The carrying amounts disclosed reasonably approximate the fair values at year-end, given the predominantly current nature of the other liabilities.
Aegon N.V [member]
Other liabilities	17 Other liabilities Loans from and payables to group companies have a maturity of less than one year. Other includes derivatives with negative fair values of EUR 97 million (2016: EUR 233 million).

Accruals

Accruals	12 Months Ended
	Dec. 31, 2017
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Accruals	45 Accruals 2017 2016 Accrued interest 183 131 Accrued expenses 147 106 At December 31 329 237 The carrying amounts disclosed reasonably approximate the fair values as at the year-end.

Capital management and solvency

Capital management and solvency	12 Months Ended
	Dec. 31, 2017
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Capital management and solvency	46 Capital management and solvency After receiving a confirmation from the Dutch Central Bank (DNB) Aegon started to apply a revised method in calculating the Solvency II contribution of the Aegon US Insurance entities under Deduction & Aggregation (D&A), affecting Aegon’s tiering of capital in 2017. It includes lowering the conversion factor from 250% to 150% Risk-Based Capital Company Action Level and reducing own funds by a 100% RBC Company Action Level requirement to reflect transferability restrictions. The methodology is subject to annual review. This methodology is consistent with EIOPA’s guidance on group solvency calculation in the context of equivalence, and in line with methods applied by other European peer companies. As a consequence, this adjustment improves the comparability to capital positions of European insurance groups with substantial insurance activities in the US. The impact on Available Own Funds in 2016 is included in the table in the Capital quality section below. Aegon manages its available capital on the new basis. Strategic importance Aegon’s approach towards capital management plays a vital role in supporting the execution of its strategy. Next to ensuring adequate capitalization to cover Aegon’s obligations towards its policyholders, capital management priorities also include the shift of capital to products that offer higher growth and return prospects, the shift from capital intensive spread business to capital light fee business and Aegon’s aim to provide for a sustainable dividend to shareholders, which can grow over time if the Company’s performance so allows. Management of capital Disciplined risk and capital management support Aegon’s decisions in deploying the capital that is generated in the Company’s businesses and that is provided for by investors. Aegon balances the funding of new business growth with the funding required to ensure that its obligations towards policyholders and debtholders are always adequately met, and providing for a sustainable dividend to shareholders. Aegon’s goal for both its operating units and for the Aegon group as a whole is to maintain a strong financial position and to be able to sustain losses from extreme business and market conditions. The company’s overall capital management strategy is based on adequate solvency capital, capital quality, and the use of leverage. Aegon’s ERM framework ensures that the Aegon Group and its operating companies are adequately capitalized and that obligations towards policyholders are always adequately met. Firmly embedded in this larger framework, Aegon’s capital management framework builds on a set of key pillars: the use of internal target capital management zones, an internal target range for the use of gross financial leverage and, supported by robust risk and capital monitoring processes that timely trigger and escalate interventions if needed to ensure that capital is always being managed towards these internal target ranges, and is prevented from falling below the regulatory minimum capital requirements. Capital adequacy The capitalization of the Aegon Group and its operating units is managed in relation to the most stringent of local regulatory requirements, rating agency requirements and/or self-imposed criteria. Aegon manages its Solvency II capital in relation to the required capital. Under Aegon’s capital management framework the own funds are managed such that the Group Solvency II ratio remains within the target range of 150% - 200% even in an adverse event. This target range was updated in the second quarter of 2017 (previous target range: 140% - 170%) in line with a revision of Aegon’s group capital management policy and the methodology change mentioned above. Minimum solvency requirements Insurance laws and regulations in local regulatory jurisdictions often contain minimum regulatory capital requirements. For insurance companies in the European Union, Solvency II formally defines a lower capital requirement, being the Minimum Capital Requirement (MCR). An irreparable breach of the MCR would lead to a withdrawal of the Company’s insurance license. Similarly, for the US insurance entities the withdrawal of the insurance license is triggered by a breach of the 100% Authorized Control Level (ACL), which is set at 50% of the Company Action Level (CAL). With the introduction of Solvency II for EEA countries, Aegon views the higher capital requirement, 100% of the SCR, as the level around which EU supervisors will formally require management to provide regulatory recovery plans. For the US insurance entities this is viewed at 100% Company Action Level (CAL). During 2017, the Aegon Group and all of its regulated entities that are subject to capital requirements on a solo-level continued to comply with the 100% Solvency II ratio. Capital quality Aegon’s capital consists of 3 Tiers as an indication of its quality, with Tier 1 capital ranking highest. It is to be noted that the Group own funds do not include any contingent liability potentially arising from unit-linked products sold, issued or advised on by Aegon in the Netherlands in the past as the potential liability cannot be reliably quantified at this point. Further, the available own funds is an estimate, has not been filed with the regulator and is subject to supervisory review. The below table provides the composition of Aegon’s available own funds across Tiers: Available own funds December 31, 2017 1) December 31, 2016 1) December 31, 2016 2) Unrestricted Tier 1 10,428 10,081 10,656 Restricted Tier 1 3,540 3,817 3,817 Tier 2 1,213 1,291 2,008 Tier 3 448 768 1,638 Total available own funds 15,628 15,957 18,119 1 The tiering information is based on the revised method which was confirmed by the DNB in 2017. 2 The 2016 comparative numbers are the final numbers as disclosed in Aegon’s 2016 Solvency and Financial Condition Report. Under the revised methodology Aegon’s own funds reduced by EUR 2.2 billion at December 31, 2016. This is reflected through eliminating deferred tax balances recorded in Tier 3 for an amount of EUR 0.9 billion and Tier 2 for an amount of EUR 0.7 billion and eliminating unrestricted Tier 1 of EUR 0.6 billion. As at December 31, 2017, Tier 1 capital accounted for 89% of own funds (2016: 87%; number based on revised method), including EUR 3,047 million of junior perpetual capital securities (2016: EUR 3,309 million) and EUR 493 million of perpetual cumulative subordinated bonds (2016: EUR 508 million) which are both classified as grandfathered restricted Tier 1 capital. As at December 31, 2017, Tier 2 capital accounted for 8% of own funds (2016: 8%; number based on revised method), including EUR 441 million of non-cumulative subordinated notes (2016: EUR 503 million) and EUR 772 million of fixed floating subordinated notes (2016: EUR 788 million) which are both classified as grandfathered Tier 2 capital. Changes in Tier 2 capital compared to previous year is mainly related to foreign currency movements. The grandfathered restricted Tier 1 and Tier 2 capital instruments are grandfathered such that they are considered as capital under the Solvency II framework for up to 10 years as from January 1, 2016. For the terms and conditions of these grandfathered instruments refer to note 33 and note 34 to the consolidated financial statements. It is to be noted that the difference between the amounts mentioned above for junior perpetual capital securities and perpetual cumulative subordinated bonds, and those in note 33 and note 34 to the consolidated financial statements, stem from valuation differences between Solvency II (market value) and IFRS rules (refer to note 2.17 and 2.18). Tier 3 capital as of December 31, 2017 is comprised of deferred tax assets balances related to Solvency II entities. IFRS equity compares to Solvency II own funds as follows: December 31, 2017 1) December 31, 2016 1) December 31, 2016 2) Shareholders’ Equity 20,288 20,520 20,520 IFRS adjustments for Other Equity instruments and non controlling interests 3,813 3,821 3,821 Group Equity 24,102 24,341 24,341 Solvency II revaluations (5,416 ) (5,241 ) (5,241 ) Excess of Assets over Liabilities 18,685 19,100 19,100 Availability adjustments (606 ) (361 ) (361 ) Fungibility restrictions 2) (693 ) (619 ) (619 ) Transferability restrictions 3) (1,758 ) (2,162 ) - Available own funds 15,628 15,957 18,119 1 The own funds information is based on the revised method which was confirmed by the DNB in 2017. 2 Amongst others, this contains the exclusion of Aegon Bank. 3 This includes the transferability restriction related to the new RBC CAL conversion methodology. 4 The 2016 comparative numbers are the final numbers as disclosed in Aegon’s 2016 Solvency and Financial Condition Report. The Solvency II revaluations of EUR 5,416 million negative (2016: EUR 5,241 million negative) stem from the difference in valuation between IFRS and Solvency II frameworks, which can be grouped into three categories: ◆ Items that are not recognized under Solvency II. The most relevant examples of this category for Aegon include Goodwill, DPAC and other intangible assets (EUR 2,019 million, 2016: EUR 2,118 million); ◆ Items that have a different valuation treatment between IFRS and Solvency II. Solvency II is a market consistent framework hence all assets and liabilities are to be presented at fair value while IFRS also includes other valuation treatments in addition to fair value. The most relevant examples of this category for Aegon Group include Loans and Mortgages, Reinsurance Recoverables, Deferred tax assets balances and Technical provisions. The revaluation difference stemming from this category amounted to EUR (1,416) million (2016: EUR (1,531) million) compared to the IFRS Statement of Financial Position; ◆ The Net Asset Value of subsidiaries that are included under the Deduction & Aggregation method (on provisional equivalence or Standard Formula basis) in the Group Solvency II results. The revaluation difference stemming from this category amounted to EUR (6,019) million (2016: EUR (5,828) million) compared to the IFRS Statement of Financial Position. The availability adjustments are changes to the availability of own funds of Aegon Group in accordance with Solvency II requirements. Examples include the adjustments for subordinated liabilities, ring-fenced fund, treasury shares and foreseeable dividend (if applicable). Fungibility restrictions limit the availability of own funds on Aegon Group level as prescribed by Supervisory Authorities. These limitations refer to charitable trusts in the Americas for which the local Supervisory Authority could limit the upstream of capital to the Group, to a temporary restriction in relation to the sale of Aegon Ireland (the difference between the sale price and Aegon Ireland’s own funds are considered not available at Group level until completion of the sale, expected in the first half of 2018) and Aegon Bank which is under a different regulatory regime but under the same Supervisory Authority and therefore excluded for Solvency II purposes. Finally, Transferability restrictions reflect the restrictions on US Life Companies DTA and capping of Tier 1 unrestricted own funds as a consequence of the new RBC CAL conversion methodology as described above. Capital leverage Aegon’s total capitalization reflects the capital employed in the business units and consists of shareholders’ capital and total gross financial leverage. Aegon’s gross financial leverage ratio is calculated by dividing total financial leverage by total capitalization. Aegon aims to keep total gross financial leverage within a range of 26% to 30% of total capitalization as measured by the gross financial leverage ratio, and a fixed charge coverage in the range of 6-8x the interest payments on financial leverage. Aegon defines total financial leverage as debt or debt-like funding issued for general corporate purposes and for capitalizing Aegon’s business units. Total financial leverage includes hybrid instruments, in addition to both subordinated and senior debt. Aegon’s total capitalization comprises the following components: ◆ Shareholders’ equity excluding revaluation reserves and the remeasurement of defined benefit plans, based on IFRS as adopted by the EU; ◆ Non-controlling interests and share options not yet exercised; and ◆ Total financial leverage. As at December 31, 2017, Aegon’s total capitalization amounted to EUR 24.4 billion (EUR 24.8 billion on December 31, 2016), its gross financial leverage ratio was 28.6% (29.8% on December 31, 2016) and its fixed charge coverage was 8.0x (7.2x on December 31, 2016). The following table shows the composition of the total capitalization and the calculation of the gross financial leverage ratio: Note 2017 2016 Total shareholders’ equity - based on IFRS as adopted by the EU 2 20,573 20,913 Non-controlling interests, share options and incentive plans not yet exercised 33, SOFP 2) 81 88 Revaluation reserves 32 (4,920 ) (5,381 ) Remeasurement of defined benefit plans 32 1,669 1,820 Shareholders’ capital 17,401 17,440 Junior perpetual capital securities 33 3,008 3,008 Perpetual cumulative subordinated bonds 33 454 454 Non-cumulative subordinated notes (Other equity instruments) 33 271 271 Fixed floating subordinated notes 34 695 695 Non-cumulative subordinated notes (Subordinated borrowings) 34 69 72 Trust pass-through securities 35 133 156 Currency revaluation other equity instruments 1) 40 340 Hybrid leverage 4,669 4,996 Senior debt 3) 39 2,312 2,414 Senior leverage 2,312 2,414 Total gross financial leverage 6,982 7,409 Total capitalization 24,383 24,849 Gross financial leverage ratio 28.6% 29.8% 1 Other equity instruments that are denominated in foreign currencies are, for purpose of calculating hybrid leverage, revalued to the period-end exchange rate. 2 Non-controlling interests are disclosed in the statement of financial position. 3 Senior debt for the gross financial leverage calculation also contains swaps for an amount of EUR 31 million (2016: EUR 28 million). Aegon N.V. is subject to financial covenants as included in a number of its financial agreements (such as issued debentures, credit facilities and ISDA agreements). Under these financial covenants, an event of default may occur if and when any financial indebtedness of any member of the Group is not paid when due, or not paid within any applicable grace period. The financial agreements may also include a cross-default provision which may be triggered if and when any financial indebtedness of any member of the Group is declared to be or otherwise becomes due and payable prior to its specified maturity as a result of an event of default. All financial agreements are periodically monitored to assess the likelihood of a breach of any financial covenant and the likelihood thereof in the near future. No breach of any such covenant occurred during 2017. Aegon N.V. is subject to legal restrictions with regard to the amount of dividends it can pay to its shareholders. Under Dutch law, the amount that is available to pay dividends consists of total shareholders’ equity less the issued and outstanding capital and the reserves required by law. The revaluation account and legal reserves, foreign currency translation reserve (FCTR) and other reserves, cannot be freely distributed. In case of negative balances for individual reserves legally to be retained, no distributions can be made out of retained earnings to the level of these negative amounts. Total distributable items under Dutch law amounted to EUR 13,749 million as at December 31, 2017 (2016: EUR 11,996 million). The following table shows the composition of the total distributable items: Distributable items 1) 2017 2016 Equity attributable to shareholders - based on IFRS as adopted by the EU 20,573 20,913 Not distributable items: Share capital (322 ) (319 ) Statutory reserves 2) (6,502 ) (8,598 ) At December 31 13,749 11,996 1 Distributable items under Dutch law; note that Solvency II ratio also possibly restricts the distribution of dividends. 2 Statutory reserves contains legal reserves FCTR, group companies and revaluation account consists of positive revaluations only. The ability of Aegon’s subsidiaries, principally insurance companies, to pay dividends to the holding company is constrained by the requirement for these subsidiaries to remain adequately capitalized to the levels set by local insurance regulations and governed by local insurance supervisory authorities. Based on the capitalization level of the local subsidiary, local insurance supervisors are able to restrict and/or prohibit the transfer of dividends to the holding company. In addition, the ability of subsidiaries to pay dividends to the holding company can be constrained by the requirement for these subsidiaries to hold sufficient shareholders’ equity as determined by law. The capitalization level and shareholders’ equity of the subsidiaries can be impacted by various factors (e.g. general economic conditions, capital market risks, underwriting risk factors, changes in government regulations, and legal and arbitrational proceedings). To mitigate the impact of such factors on the ability to pay dividends, the subsidiaries hold additional capital in excess of the levels required by local insurance regulations, as reflected in Aegon’s target capitalization ranges.

Fair value

Fair value	12 Months Ended
	Dec. 31, 2017
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Fair value	47 Fair value The estimated fair values of Aegon’s assets and liabilities correspond with the amounts that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When available, Aegon uses quoted market prices in active markets to determine the fair value of investments and derivatives. In the absence of an active market, the fair value of investments in financial assets is estimated by using other market observable data, such as corroborated external quotes and present value or other valuation techniques. An active market is one in which transactions are taking place regularly on an arm’s length basis. Fair value is not determined based upon a forced liquidation or distressed sale. Valuation techniques are used when Aegon determines the market is inactive or quoted market prices are not available for the asset or liability at the measurement date. However, the fair value measurement objective remains the same, that is, to estimate the price at which an orderly transaction to sell the asset or to transfer the liability would take place between market participants at the measurement date under current market conditions (i.e. an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability). Therefore, unobservable inputs reflect Aegon’s own assumptions about the assumptions that market participants would use in pricing the asset or liability (including assumptions about risk). These inputs are developed based on the best information available. Aegon employs an oversight structure over valuation of financial instruments that includes appropriate segregation of duties. Senior management, independent of the investing functions, is responsible for the oversight of control and valuation policies and for reporting the results of these policies. For fair values determined by reference to external quotation or evidenced pricing parameters, independent price determination or validation is utilized to corroborate those inputs. Further details of the validation processes are set out below. Valuation of assets and liabilities is based on a pricing hierarchy, in order to maintain a controlled process that will systematically promote the use of prices from sources in which Aegon has the most confidence, where the least amount of manual intervention exists and to embed consistency in the selection of price sources. Depending on asset type the pricing hierarchy consists of a waterfall that starts with making use of market prices from indices and follows with making use of third-party pricing services or brokers. Fair value hierarchy The table below provides an analysis of assets and liabilities recorded at fair value on a recurring basis by level of the fair value hierarchy: Level I Level II Level III Total 2017 Assets carried at fair value Available-for-sale Shares 51 151 288 490 Debt securities 26,338 52,415 1,447 80,200 Money market and other short-term instruments 1,664 5,026 - 6,690 Other investments at fair value - 208 583 791 28,053 57,800 2,318 88,170 Fair value through profit or loss Shares 226 232 604 1,062 Debt securities 1,964 2,175 4 4,144 Money market and other short-term instruments 17 102 - 119 Other investments at fair value 1 539 1,255 1,795 Investments for account of policyholders 1) 115,323 76,302 1,784 193,409 Derivatives 68 5,787 57 5,912 Investments in real estate - - 2,147 2,147 Investments in real estate for policyholders - - 655 655 117,599 85,137 6,506 209,241 Revalued amounts Real estate held for own use - - 307 307 - - 307 307 Total assets at fair value 145,652 142,937 9,130 297,718 Liabilities carried at fair value Investment contracts for account of policyholders 2) - 36,950 219 37,169 Borrowings 3) - 536 - 536 Derivatives 34 5,251 1,845 7,130 Total liabilities at fair value 34 42,738 2,064 44,835 1 The investments for account of policyholders included in the table above only include investments carried at fair value through profit or loss. 2 The investment contracts for account of policyholders included in the table above represents only those investment contracts carried at fair value. 3 Total borrowings on the statement of financial position contain borrowings carried at amortized cost that are not included in the above schedule. Note that the investment contracts for account of policyholders previously reported as Level I have been reclassified to Level II, as the value of these liabilities is directly derived from the fair value of the linked investments for account of policyholders. The comparative numbers have been adjusted accordingly. These reclassifications had no effect on net income, shareholders’ equity or earnings per share. Level I Level II Level III Total 2016 Assets carried at fair value Available-for-sale Shares 119 312 393 824 Debt securities 29,386 69,702 1,966 101,054 Money market and other short-term instruments - 6,776 - 6,776 Other investments at fair value - 453 754 1,206 29,504 77,243 3,112 109,860 Fair value through profit or loss Shares 288 152 50 490 Debt securities 27 2,082 6 2,115 Money market and other short-term instruments - 317 - 317 Other investments at fair value 1 961 1,257 2,219 Investments for account of policyholders 1) 125,997 75,202 1,726 202,924 Derivatives 41 8,169 108 8,318 Investments in real estate - - 1,999 1,999 Investments in real estate for policyholders - - 686 686 126,355 86,883 5,831 219,069 Revalued amounts Real estate held for own use - - 332 332 - - 332 332 Total assets at fair value 155,860 164,126 9,275 329,261 Liabilities carried at fair value Investment contracts for account of policyholders 2) - 42,627 176 42,803 Borrowings 3) - 610 - 610 Derivatives 64 6,347 2,467 8,878 Total liabilities at fair value 64 49,584 2,643 52,290 1 The investments for account of policyholders included in the table above only include investments carried at fair value through profit or loss. 2 The investment contracts for account of policyholders included in the table above represents only those investment contracts carried at fair value. 3 Total borrowings on the statement of financial position contain borrowings carried at amortized cost that are not included in the above schedule. Significant transfers between Level I, Level II and Level III Aegon’s policy is to record transfers of assets and liabilities between Level I, Level II and Level III at their fair values as of the beginning of each reporting period. The table below shows transfers between Level I and Level II for financial assets and financial liabilities recorded at fair value on a recurring basis. Total 2017 Total 2016 Transfers Level I Transfers Level II Transfers Level I Transfers Level II Assets carried at fair value Available-for-sale Shares 1 1 - - Debt securities 12 - 5 69 Money markets and other short-term instruments - 1,664 - - 13 1,666 5 69 Fair value through profit or loss Shares 124 19 - - Investments for account of policyholders 12 30 3 (1 ) 136 49 3 (1 ) Total assets at fair value 149 1,714 8 68 Investment contracts for account of policyholders 1 - - - Total liabilities carried at fair value 1 - - - Transfers are identified based on transaction volume and frequency, which are indicative of an active market. Movements in Level III financial instruments measured at fair value The following table summarizes the change of all assets and liabilities measured at estimated fair value on a recurring basis using significant unobservable inputs (Level III), including realized and unrealized gains (losses) of all assets and liabilities and unrealized gains (losses) of all assets and liabilities still held at the end of the respective period. Assets carried at fair value LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO Available-for-sale Shares 393 54 (46 ) 68 (112 ) (35 ) (34 ) - - - - 288 - Debt securities 1,966 39 (2 ) 678 (149 ) (890 ) (186 ) - 203 (211 ) - 1,447 - Other investments at fair value 754 (112 ) (109 ) 194 (48 ) (9 ) (87 ) - 1 - - 583 - 3,112 (19 ) (158 ) 939 (309 ) (935 ) (307 ) - 205 (211 ) - 2,318 - Fair value through profit or loss Shares 50 (11 ) - 583 (18 ) - - - - - - 604 (11 ) Debt securities 6 - - - - - (1 ) - - - - 4 1 Other investments at fair value 1,257 23 - 378 (350 ) - (162 ) - 341 (233 ) - 1,255 20 Investments for account of policyholders 1,726 11 - 671 (622 ) - (27 ) - 32 (8 ) - 1,784 30 Derivatives 108 (33 ) - - - - (2 ) (16 ) - - - 57 (21 ) Investments in real estate 1,999 193 - 246 (202 ) - (89 ) - - - - 2,147 77 Investments in real estate for policyholders 686 38 - 10 (53 ) - (26 ) - - - - 655 38 5,831 220 - 1,889 (1,245 ) - (306 ) (16 ) 374 (241 ) - 6,506 134 Revalued amounts Real estate held for own use 332 (2 ) 8 (3 ) (4 ) - (24 ) - - - - 307 (3 ) 332 (2 ) 8 (3 ) (4 ) - (24 ) - - - - 307 (3 ) Total assets at fair value 9,275 199 (150 ) 2,826 (1,558 ) (935 ) (638 ) (16 ) 578 (452 ) - 9,130 131 Liabilities carried at fair value Investment contracts for account of policyholders 176 7 - 60 (21 ) - (12 ) - 10 (2 ) - 219 (2 ) Derivatives 2,467 (828 ) - - 300 - (75 ) 10 - - (30 ) 1,845 (745 ) 2,643 (821 ) - 60 279 - (87 ) 10 10 (2 ) (30 ) 2,064 (747 ) 1 Includes impairments and movements related to fair value hedges. Gains and losses are recorded in the line item Results from financial transactions of the income statement. 2 Total gains and losses are recorded in line items: Gains / (losses) on revaluation of available-for-sale investments, (Gains) / losses transferred to the income statement on disposal and impairment of available-for-sale investments and Changes in revaluation reserve real estate held for own use of the statement of other comprehensive income. 3 Total gains / (losses) for the period during which the financial instrument was in Level III. Assets carried at fair value LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO Available-for-sale Shares 293 27 (7 ) 161 (92 ) (1 ) 11 - - - - 393 - Debt securities 4,144 1 92 443 (262 ) (287 ) 39 - 651 (2,854 ) - 1,966 - Other investments at fair value 928 (177 ) 20 240 (133 ) (141 ) 18 - - (1 ) - 754 - 5,365 (150 ) 105 845 (487 ) (429 ) 68 - 651 (2,856 ) - 3,112 - Fair value through profit or loss Shares - 3 - 48 - - - - - - - 50 3 Debt securities 6 (1 ) - - - - - - - - - 6 - Other investments at fair value 1,265 (44 ) - 178 (277 ) - 35 - 419 (321 ) - 1,257 (42 ) Investments for account of policyholders 1,745 22 - 469 (395 ) - (35 ) - 8 (88 ) - 1,726 23 Derivatives 222 (285 ) - 75 108 - (12 ) - - - - 108 (287 ) Investments in real estate 1,990 70 - 120 (215 ) - 19 15 - - - 1,999 118 Investments in real estate for policyholders 1,022 (26 ) - 81 (260 ) - (131 ) - - - - 686 22 6,250 (261 ) - 971 (1,039 ) - (123 ) 15 427 (409 ) - 5,831 (163 ) Revalued amounts Real estate held for own use 338 (9 ) 8 5 - - 6 (15 ) - - - 332 5 338 (9 ) 8 5 - - 6 (15 ) - - - 332 5 Total assets at fair value 11,954 (420 ) 113 1,821 (1,527 ) (429 ) (49 ) - 1,077 (3,264 ) - 9,275 (159 ) Liabilities carried at fair value Investment contracts for account of policyholders 156 (14 ) - 45 (12 ) - 2 - - (2 ) - 176 1 Derivatives 2,104 542 - - (207 ) - 28 - - - - 2,467 562 2,260 528 - 45 (219 ) - 31 - - (2 ) - 2,643 563 1 Includes impairments and movements related to fair value hedges. Gains and losses are recorded in the line item Results from financial transactions of the income statement. 2 Total gains and losses are recorded in line items: Gains / (losses) on revaluation of available-for-sale investments, (Gains) / losses transferred to the income statement on disposal and impairment of available-for-sale investments and Changes in revaluation reserve real estate held for own use of the statement of other comprehensive income. 3 Total gains / (losses) for the period during which the financial instrument was in Level III. During 2017, Aegon transferred certain financial instruments from Level II to Level III of the fair value hierarchy. The reason for the change in level was that the market liquidity for these securities decreased, which led to a change in market observability of prices. Prior to transfer, the fair value for the Level II securities was determined using observable market transactions or corroborated broker quotes respectively for the same or similar instruments. The amount of assets and liabilities transferred to Level III was EUR 588 million (2016: EUR 1,077 million). Since the transfer, all such assets have been valued using valuation models incorporating significant non market-observable inputs or uncorroborated broker quotes. Similarly, during 2017, Aegon transferred EUR 454 million (full year 2016: EUR 3,266 million) of financial instruments from Level III to other levels of the fair value hierarchy. The change in level was mainly the result of a return of activity in the market for these securities and that for these securities the fair value could be determined using observable market transactions or corroborated broker quotes for the same or similar instruments. Valuation techniques and significant unobservable inputs The table below presents information about the significant unobservable inputs used for recurring fair value measurements for certain Level III financial instruments. Assets carried at fair Valuation technique 1) Significant 2) December 31, Range December 31, Range Available-for-sale Shares Net asset value 3) n.a. 231 n.a. 262 n.a. Other n.a. 57 n.a. 131 n.a. 288 393 Debt securities Broker quote n.a. 1,034 n.a. 1,389 n.a. 1.04% - 2.72% 1.30% - 3.37% Discounted cash flow Credit spread 116 (2.64%) 221 (3.08%) Other n.a. 297 n.a. 355 n.a. 1,447 1,966 Other investments at fair value Tax credit investments Discounted cash flow Discount rate 528 5.8% 676 5.6% Investment funds Net asset value 3) n.a. 31 n.a. 45 n.a. Other Other n.a. 24 n.a. 32 n.a. 583 754 At December 31 2,318 3,112 Fair value through profit or loss Shares Other n.a. 604 n.a. 50 n.a. Debt securities Other n.a. 4 n.a. 6 n.a. 609 56 Other investments at fair value Investment funds Net asset value 3) n.a. 1,246 n.a. 1,252 n.a. Other Other n.a. 9 n.a. 5 n.a. 1,255 1,257 Derivatives Longevity swap Discounted cash flow Mortality 24 n.a. 27 n.a. Longevity swap -/- 0.21% - Discounted cash flow Risk free rate - - 73 1.67% (1.01%) Other Other n.a. 30 n.a. 4 n.a. 54 104 Real estate Investments in real estate Direct capitalization Capitalization 3.0% - 10.0% 4.8% - 10.5% technique rate 496 (5.9%) 568 (6.3%) Appraisal value n.a. 1,495 n.a. 1,237 n.a. Other n.a. 155 n.a. 193 n.a. 2,147 1,999 At December 31 4,065 3,415 Revalued amounts Real estate held for own use Direct capitalization Capitalization 6.0% - 10.0% 6.5% - 9.5% technique rate 157 (7.9%) 178 (7.9%) Appraisal value n.a. 115 n.a. 120 n.a. Other n.a. 35 n.a. 34 n.a. At December 31 307 332 Total assets at fair value 4) 6,689 6,859 Liabilities carried at fair value Derivatives Embedded derivatives in Own credit 0.2% - 0.3% 0.4% - 0.5% insurance contracts Discounted cash flow spread 1,831 (0.22%) 2,083 (0.4%) Longevity swap Discounted cash flow Mortality 10 n.a. - n.a. Other Other n.a. 3 n.a. 384 n.a. Total liabilities at fair value 1,845 2,467 1 Other in the table above (column Valuation technique) includes investments for which the fair value is uncorroborated and no broker quote is received. 2 Not applicable (n.a.) has been included when no significant unobservable assumption has been identified. 3 Net asset value is considered the best approximation to the fair value of these financial instruments. 4 Investments for account of policyholders are excluded from the table above and from the disclosure regarding reasonably possible alternative assumptions. Policyholder assets, and their returns, belong to policyholders and do not impact Aegon’s net income or equity. The effect on total assets is offset by the effect on total liabilities. Derivatives exclude derivatives for account of policyholders amounting to EUR 3 million (2016: EUR 4). For reference purposes, the valuation techniques included in the table above are described in more detail on the following pages. Effect of changes in significant unobservable assumptions to reasonably possible alternatives From all significant unobservable inputs, own credit spread as included in the discount rate for embedded derivatives in insurance contracts is considered significant. It is estimated that changing the other significant unobservable inputs to reflect reasonable possible alternatives in valuation would have no significant impact for the Group. An increase in own credit spread results in lower valuation, while a decrease results in a higher valuation of the embedded derivatives. The table below presents the impact on a fair value measurement of a change in the own credit spread by 20 basis points included in the discount rate. December 31, Effect of reasonably December 31, Effect of reasonably Increase Decrease Increase Decrease Financial liabilities carried at fair value Embedded derivatives in insurance contracts 1,831 125 (120 ) 2,083 205 (194 ) Fair value information about assets and liabilities not measured at fair value The following table presents the carrying values and estimated fair values of assets and liabilities, excluding assets and liabilities which are carried at fair value on a recurring basis. 2017 Carrying amount Estimated fair value hierarchy Total estimated fair Level I Level II Level III Assets Mortgage loans - held at amortized cost 33,562 - - 38,076 38,076 Private loans - held at amortized cost 3,642 - 64 4,117 4,181 Other loans - held at amortized cost 2,164 6 1,991 166 2,164 Liabilities Subordinated borrowings - held at amortized cost 764 791 162 - 953 Trust pass-through securities - held at amortized cost 133 - 137 - 137 Borrowings – held at amortized cost 13,099 2,116 28 11,355 13,499 Investment contracts - held at amortized cost 16,665 - 9,676 7,356 17,031 2016 Carrying amount Estimated fair value hierarchy Total estimated fair Level I Level II Level III Assets Mortgage loans - held at amortized cost 33,696 - - 38,498 38,499 Private loans - held at amortized cost 3,166 - 52 3,516 3,569 Other loans - held at amortized cost 2,441 - 2,292 148 2,441 Liabilities Subordinated borrowings - held at amortized cost 767 703 140 - 844 Trust pass-through securities - held at amortized cost 156 - 141 - 141 Borrowings – held at amortized cost 12,543 2,138 31 10,766 12,935 Investment contracts - held at amortized cost 19,217 - 8,951 10,797 19,748 Certain financial instruments that are not carried at fair value are carried at amounts that approximate fair value, due to their short-term nature and generally negligible credit risk. These instruments include cash and cash equivalents, short-term receivables and accrued interest receivable, short-term liabilities, and accrued liabilities. These instruments are not included in the table above. Fair value measurement The description of Aegon’s methods of determining fair value and the valuation techniques are described on the following pages. Shares When available, Aegon uses quoted market prices in active markets to determine the fair value of its investments in shares. Fair values for unquoted shares are estimated using observations of the price/earnings or price/cash flow ratios of quoted companies considered comparable to the companies being valued. Valuations are adjusted to account for company-specific issues and the lack of liquidity inherent in an unquoted investment. Adjustments for lack of liquidity are generally based on available market evidence. In addition, a variety of other factors are reviewed by management, including, but not limited to, current operating performance, changes in market outlook and the third-party financing environment. Also for unquoted shares the net asset value may be considered the best approximation to the fair value. Net asset value is the value of an entity’s assets minus the value of its liabilities and may be the same as the book value or the equity value of the entity. Available-for-sale shares include shares in a Federal Home Loan Bank (FHLB) for an amount of EUR 204 million (2016: EUR 237 million), which are reported as part of the line-item Net asset value. A FHLB has implicit financial support from the United States government. The redemption value of the shares is fixed at par and they can only be redeemed by the FHLB. Investment funds: Real estate funds, private equity funds and hedge funds The fair values of investments held in non-quoted investment funds are determined by management after taking into consideration information provided by the fund managers. Aegon reviews the valuations each month and performs analytical procedures and trending analyses to ensure the fair values are appropriate. The net asset value is considered the best valuation method that approximates the fair value of the funds. Debt securities The fair values of debt securities are determined by management after taking into consideration several sources of data. When available, Aegon uses quoted market prices in active markets to determine the fair value of its debt securities. As stated previously, Aegon’s valuation policy utilizes a pricing hierarchy which dictates that publicly available prices are initially sought from indices and third-party pricing services. In the event that pricing is not available from these sources, those securities are submitted to brokers to obtain quotes. The majority of brokers’ quotes are non-binding. As part of the pricing process, Aegon assesses the appropriateness of each quote (i.e. as to whether the quote is based on observable market transactions or not) to determine the most appropriate estimate of fair value. Lastly, securities are priced using internal cash flow modeling techniques. These valuation methodologies commonly use the following inputs: reported trades, bids, offers, issuer spreads, benchmark yields, estimated prepayment speeds, and/ or estimated cash flows. To understand the valuation methodologies used by third-party pricing services Aegon reviews and monitors the applicable methodology documents of the third-party pricing services. Any changes to their methodologies are noted and reviewed for reasonableness. In addition, Aegon performs in-depth reviews of prices received from third-party pricing services on a sample basis. The objective for such reviews is to demonstrate that Aegon can corroborate detailed information such as assumptions, inputs and methodologies used in pricing individual securities against documented pricing methodologies. Only third-party pricing services and brokers with a substantial presence in the market and with appropriate experience and expertise are used. Third-party pricing services will often determine prices using recently reported trades for identical or similar securities. The third-party pricing service makes adjustments for the elapsed time from the trade date to the reporting date to take into account available market information. Lacking recently reported trades, third-party pricing services and brokers will use modeling techniques to determine a security price where expected future cash flows are developed based on the performance of the underlying collateral and discounted using an estimated market rate. Periodically, Aegon performs an analysis of the inputs obtained from third-party pricing services and brokers to ensure that the inputs are reasonable and produce a reasonable estimate of fair value. Aegon’s asset specialists and investment valuation specialists consider both qualitative and quantitative factors as part of this analysis. Several examples of analytical procedures performed include, but are not limited to, recent transactional activity for similar debt securities, review of pricing statistics and trends and consideration of recent relevant market events. Other controls and procedures over pricing received from indices, third-party pricing services, or brokers include validation checks such as exception reports which highlight significant price changes, stale prices or unpriced securities. Additionally, Aegon performs back testing on a sample basis. Back testing involves selecting a sample of securities trades and comparing the prices in those transactions to prices used for financial reporting. Significant variances between the price used for financial reporting and the transaction price are investigated to explain the cause of the difference. Credit ratings are also an important consideration in the valuation of securities and are included in the internal process for determining Aegon’s view of the risk associated with each security. However, Aegon does not rely solely on external credit ratings and there is an internal process, based on market observable inputs, for determining Aegon’s view of the risks associated with each security. Aegon’s portfolio of private placement securities (held at fair value under the classification of available-for-sale or fair value through profit or loss) is valued using a matrix pricing methodology. The pricing matrix is obtained from a third-party service provider and indicates current spreads for securities based on weighted average life, credit rating, and industry sector. Each month, Aegon’s asset specialists review the matrix to ensure the spreads are reasonable by comparing them to observed spreads for similar bonds traded in the market. Other inputs to the valuation include coupon rate, the current interest rate curve used for discounting and a liquidity premium to account for the illiquid nature of these securities. The liquidity premiums are determined based upon the pricing of recent transactions in the private placements market; comparing the value of the privately offered security to a similar public security. The impact of the liquidity premium for private placement securities to the overall valuation is insignificant. Aegon’s portfolio of debt securities can be subdivided in Residential mortgage-backed securities (RMBS), Commercial mortgage-backed securities (CMBS), Asset-backed securities (ABS), Corporate bonds and Government debt. Below relevant details in the valuation methodology for these specific types of debt securities are described. Residential mortgage-backed securities, commercial mortgage-backed securities and asset-backed securities Valuations of RMBS, CMBS and ABS are monitored and reviewed on a monthly basis. Valuations per asset type are based on a pricing hierarchy which uses a waterfall approach that starts with market prices from indices and follows with third-party pricing services or brokers. The pricing hierarchy is dependent on the possibilities of corroboration of the market prices. If no market prices are available, Aegon uses internal models to determine fair value. Significant inputs included in the internal models are generally determined based on relative value analyses, which incorporate comparisons to instruments with similar collateral and risk profiles. Market standard models may be used to model the specific collateral composition and cash flow structure of each transaction. The most significant unobservable input is liquidity premium which is embedded in the discount rate. Corporate bonds Valuations of corporate bonds are monitored and reviewed on a monthly basis. The pricing hierarchy is dependent on the possibility of corroboration of market prices when available. If no market prices are available, valuations are determined by a discounted cash flow methodology using an internally calculated yield. The yield is comprised of a credit spread over a given benchmark. In all cases the benchmark is an observable input. The credit spread contains both observable and unobservable inputs. Aegon starts by taking an observable credit spread from a similar bond of the given issuer, and then adjust this spread based on unobservable inputs. These unobservable inputs may include subordination, liquidity and maturity differences. The weighted average credit spread used in valuation of corporate bonds has decreased to 2.6% (December 31, 2016: 3.1%). Government debt When available, Aegon uses quoted market prices in active markets to determine the fair value of its government debt investments. When Aegon cannot make use of quoted market prices, market prices from indices or quotes from third-party pricing services or brokers are used. Tax credit investments The fair value of tax credit investments is determined by using a discounted cash flow valuation technique. This valuation technique takes into consideration projections of future capital contributions and distributions, as well as future tax credits and the tax benefits of future operating losses. The present value of these cash flows is calculated by applying a discount rate. In general, the discount rate is determined based on the cash outflows for the investments and the cash inflows from the tax credits and/or tax benefits (and the timing of these cash flows). These inputs are unobservable in the market place. The discount rate used in valuation of tax credit investments has increased to 5.8% (December 31, 2016: 5.6%). Mortgage loans, policy loans and private loans ( held at amortized cost For private loans, fixed interest mortgage loans and other loans originated by the Group, the fair value used for disclosure purposes is estimated by discounting expected future cash flows using a current market rate applicable to financial instruments with similar yield and maturity characteristics. For fixed interest mortgage loans, the market rate is adjusted for expenses, prepayment rates, lapse assumptions (unobservable inputs), liquidity and credit risk (market observable inputs). An increase in expense spread, prepayment rates and/or prepayment assumptions, would decrease the fair value of the mortgage loan portfolio. The fair value of floating interest rate mortgage loans, policy loans and private placements used for disclosure purposes is assumed to be approximated by their carrying amount, adjusted for changes in credit risk. Credit risk adjustments are based on market observable credit spreads if available, or management’s estimate if not market observable. Money market and other short-term investments and deposits with financial institutions The fair value of assets maturing within a year is assumed to be approximated by their carrying amount adjusted for credit risk where appropriate. Credit risk adjustments are based on market observable credit spreads if available, or management’s estimate if not market observable. Derivatives Where quoted market prices are not available, other valuation techniques, such as option pricing or stochastic modeling, are applied. The valuation techniques incorporate all factors that a typical market participant would consider and are based on observable market data when available. Models are validated before they are used and calibrated to ensure that outputs reflect actual experience and comparable market prices. Fair values for exchange-traded derivatives, principally futures and certain options, are based on quoted market prices in active markets. Fair values for over-the-counter (OTC) derivative financial instruments represent amounts estimated to be received from or paid to a third party in settlement of these instruments. These derivatives are valued using pricing models based on the net present value of estimated future cash flows, directly observed prices from exchange-traded derivatives, other OTC trades, or external pricing services. Most valuations are derived from swap and volatility matrices, which are constructed for applicable indices and currencies using current market data from many industry standard sources. Option pricing is based on industry standard valuation models and current market levels, where applicable. The pricing of complex or illiquid instruments is based on internal models or an independent third party. For long-dated illiquid contracts, extrapolation methods are applied to observed market data in order to estimate inputs and assumptions that are not directly observable. To value OTC derivatives, management uses observed market information, other trades in the market and dealer prices. Some OTC derivatives are so-called longevity derivatives. The payout of longevity derivatives is linked to publicly available mortality tables. The derivatives are measured using the present value of the best estimate of expected payouts of the derivative plus a risk margin. The best estimate of expected payouts is determined using best estimate of mortality developments. Aegon determined the risk margin by stressing the best estimate mort

Commitments and contingencies

Commitments and contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and contingencies	48 Commitments and contingencies Investments contracted In the normal course of business, the Group has committed itself through purchase and sale transactions of investments, mostly to be executed in the course of 2018. The amounts represent the future outflow and inflow, respectively, of cash related to these investment transactions that are not reflected in the consolidated statement of financial position. 2017 2016 Purchase Sale Purchase Sale Real estate 196 39 - 44 Mortgage loans 3,152 69 424 78 Private loans 705 - 44 - Other 2,373 - 1,314 - Commitments increased in 2017 as a result of Aegon’s strategy to generate higher yield on its investments. Aegon has committed itself, through certain subsidiaries, to invest in real estate, private loans, mortgages loans and receivables and investment funds. Mortgage loans commitments represent undrawn mortgage loan facility provided and outstanding proposals on mortgages. The sale of mortgage loans relates to pre-announced redemptions on mortgage loans. Private loans represents deals on Aegon’s portfolio of private placement securities that Aegon has committed to, but have not yet settled and funded. Other commitments include future purchases of interests in investment funds and limited partnerships. Future lease payments 2017 2016 Future lease payments Not later 1-5 years Later than 5 Not later 1-5 years Later than 5 Operating lease obligations 74 143 201 88 189 231 Operating lease rights 41 104 27 53 124 32 The operating lease obligations relate mainly to office space leased from third parties. The operating lease rights relate to non-cancellable commercial property leases. Other commitments and contingencies 2017 2016 Guarantees 483 682 Standby letters of credit 12 29 Share of contingent liabilities incurred in relation to interests in joint ventures 39 40 Other guarantees 16 18 Other commitments and contingent liabilities 32 12 Guarantees include those guarantees associated with the sale of investments in low-income housing tax credit partnerships in the United States. Standby letters of credit amounts reflected above are the liquidity commitment notional amounts. In addition to the guarantees shown in the table, guarantees have been given for fulfillment of contractual obligations such as investment mandates related to investment funds. Contractual obligations An Aegon N.V. indirect US life subsidiary has a net worth maintenance agreement with its subsidiary Transamerica Life (Bermuda) Ltd, pursuant to which Transamerica Life Insurance Company, a US life insurance subsidiary, will provide capital sufficient to maintain a S&P ‘AA’ financial strength rating and capital sufficient to comply with the requirements of the countries in which its branches are located. Transamerica Corporation, a wholly-owned subsidiary of Aegon N.V., has provided a parental guarantee to TLIC Riverwood Reinsurance, Inc. (TRRI), an affiliated captive reinsurer, for the cash payments required fulfilling reinsurance payments to Transamerica Life Insurance Company, to the extent that the assets in the captive (TRRI) are not sufficient to cover reinsurance obligations. As of December 31, 2017, this amounted to EUR 1,793 million (2016 EUR: 2,002 million). Aegon International B.V., a wholly-owned subsidiary of Aegon N.V., has entered into a contingent capital letter for an amount of JPY 6.5 billion (EUR 49 million) to support its joint venture Aegon Sony Life Insurance Company meeting local statutory requirements. Aegon N.V. has guaranteed and is severally liable for the following: ◆ Due and punctual payment of payables due under letter of credit agreements applied for by Aegon N.V. as co-applicant with its captive insurance companies that are subsidiaries of Transamerica Corporation and Commonwealth General Corporation. At December 31, 2017, the letter of credit arrangements utilized by captives to provide collateral to affiliates amounted to EUR 3,025 million (2016: EUR 3,720 million); as of that date no amounts had been drawn, or were due under these facilities. Other letter of credit arrangements for subsidiaries amounted to EUR 55 million (2016: EUR 104 million); as of that date no amounts had been drawn, or were due under these facilities; ◆ Due and punctual payment of payables due under letter of credit agreements or guarantees provided for subsidiaries of Transamerica Corporation at December 31, 2017 amounted to EUR 3,079 million (2016: EUR 3,563 million). As of that date no amounts had been drawn, or were due under letter of credit facilities. The guarantees partly related to debt amounted to EUR 1,322 million (2016: EUR 1,505 million) and is included in the Operational funding table in note 39 Borrowings of the consolidated financial statements of the Group in the line ‘USD 1.54 billion Variable Funding Surplus Note’; ◆ Due and punctual payment of payables by the consolidated group companies Transamerica Corporation, Aegon Funding Company LLC and Commonwealth General Corporation with respect to bonds, capital trust pass-through securities and notes issued under commercial paper programs amounted to EUR 585 million (2016: EUR 633 million); and ◆ Due and punctual payment of any amounts owed to third parties by the consolidated group company Aegon Derivatives N.V. in connection with derivative transactions. Aegon Derivatives N.V. only enters into derivative transactions with counterparties with which ISDA master netting agreements, including collateral support annex agreements, have been agreed. Net (credit) exposure on derivative transactions with these counterparties was therefore limited as of December 31, 2017. Legal and arbitration proceedings, regulatory investigations and actions Aegon faces significant risks of litigation as well as regulatory investigations and actions relating to its and its subsidiaries’ insurance, pensions, securities, investment management, investment advisory and annuities businesses as well as Aegon’s corporate compliance, including compliance with employment, sanctions, anti-corruption and tax regulations. Aegon subsidiaries regularly receive inquiries from local regulators and policyholder advocates in various jurisdictions, including the United States, the Netherlands, and the United Kingdom. In some cases, Aegon subsidiaries have modified business practices in response to inquiries or findings of inquiries. Regulators may seek fines or penalties, or changes to the way Aegon operates. Insurance companies and their affiliated regulated entities are routinely subject to litigation, investigation and governmental review involving issues such as, but not limited to, product fees and costs, including transparency and adequacy of disclosure of initial costs, ongoing costs, and costs due on policy surrender as well as changes to costs over time; employment or distribution relationships; operational and internal controls and processes; environmental matters; competition and antitrust matters; data privacy; information security; intellectual property; and anti-money laundering, anti-bribery and economic sanctions compliance. Many of Aegon’s products are affected by fluctuations in equity markets as well as interest rate movements, which may prove to be volatile or disappointing to customers. Significant investment risks are often borne by the customer. Disputes and investigations initiated by governmental entities and private parties may lead to orders or settlements including payments or changes to business practices even if Aegon believes the underlying claims are without merit. The existence of potential claims may remain unknown for long periods of time after the events giving rise to such claims. Determining the likelihood of exposure to Aegon and the extent of any such exposure may not be possible for long periods of time after Aegon becomes aware of such potential claims. Once litigation is initiated, it may be protracted and subject to multiple levels of appeal. Aegon cannot predict the effect of litigation, investigations or other actions on its businesses or the insurance industry. In some jurisdictions, plaintiffs may seek recovery of very large or indeterminate amounts under claims of bad faith, resulting in punitive or treble damages. Damages alleged may not be quantifiable or supportable, or may have no relationship to economic losses or final awards. Separate from financial loss, litigation, regulatory action, legislative changes or changes in public opinion may require Aegon to change its business practices, which could have a material adverse impact on Aegon’s businesses, results of operations, cash flows and financial position. Aegon has defended and will continue to defend itself vigorously when it believes claims are without merit. Aegon has also settled and will seek to settle certain claims, including through policy modifications, as it believes appropriate. While Aegon intends to resist claims, there can be no assurance that claims brought against Aegon will not have a material adverse impact on its businesses, results of operations, and financial position. Proceedings in which Aegon is involved The SEC is conducting a formal investigation related to certain investment strategies offered through mutual funds, variable products and separately managed accounts. These strategies used quantitative models developed by one of the former portfolio managers of Aegon’s US investment management business units. Among other things, the investigation relates to the operation of and/or the existence of errors in the quantitative models in question and related disclosures. The funds and strategies under review were sub-advised, advised or marketed by Aegon’s US group companies. The models are no longer being used, although some of the funds are still being offered. The quantitative strategies are no longer being offered. Aegon is cooperating fully with the investigation. Aegon believes that the investigation will conclude in 2018, and has taken a provision of EUR 85 million in anticipation of a possible settlement with the SEC. This amount is partly recorded in the Americas (EUR 45 million) and partly in Aegon Asset Management (EUR 40 million). Government investigations, including this one, may result in the institution of administrative, injunctive or other proceedings and/or the imposition of monetary fines, penalties and/or disgorgement, as well as other remedies, sanctions, damages and restitutionary amounts. While Aegon is unable to predict what actions, if any, might be taken and is unable to predict the costs to or other impact on Aegon of any such action, there can be no assurances that this matter or other government investigations will not have a material and adverse effect on Aegon’s reputation, financial position, results of operations or liquidity. Aegon and other US insurers have been sued for charging fees on products offered in 401(k) platforms which allegedly were higher than fees charged on other products available in the market. In February 2018, the US Court of Appeals for the Ninth Circuit reversed the District Court’s order denying Transamerica companies’ motion to dismiss and directed the District Court to grant the motion to dismiss and vacated class certification. Plaintiffs may appeal. US insurers, including Aegon subsidiary Transamerica Life Insurance Company (“TLIC”), have also been named in class actions as well as individual litigation relating to monthly deduction rates increases on universal life products. Plaintiffs generally allege that the rates were increased to recoup past losses rather than to cover the future costs of providing insurance coverage. The class action against TLIC is pending in US federal district court for the Central District of California. In the first phase of one of the individual cases against TLIC to reach trial the jury found that the increase was improper. That case remains ongoing. At this time it is impracticable for Aegon to quantify a range or maximum liability or the timing of the financial impact, if any, of these matters, as the potential financial impacts are dependent both on the outcomes of court proceedings and future developments in financial markets and mortality. If decided adversely to Aegon, these claims could have a material adverse effect on Aegon’s business, results of operations, and financial position. Unclaimed property administrators and state insurance regulators performed examinations and multi-state examinations of the life insurance industry in the United States, including certain of Aegon’s subsidiaries. Aegon subsidiaries, like other major US insurers, entered into resolutions with state treasurers and insurance regulators regarding unclaimed property and claims settlement practices. As of 2017, USD 1.5 million remained in provisions, which is management’s best estimate of the still-outstanding exposure. The final amount may vary based on subsequent regulatory review. Aegon’s US operations also face employment-related lawsuits from time to time. Aegon recently defended a suit filed by self-employed independent insurance agents associated with one of Aegon’s financial marketing units who have claimed that they are, in fact, employees of the organization. The court granted Aegon’s motion to only allow individual claims to move forward and cease collective action proceedings in this case. Management believes that the potential direct financial exposure in this case is not material. This lawsuit was resolved favorably to Aegon. A former subsidiary of Transamerica Corporation was involved in a contractual dispute with a Nigerian travel broker that arose in 1976. That dispute was resolved in Delaware court for USD 235 thousand plus interest in 2010. The plaintiff took the Delaware judgment relating to the 1976 dispute to a Nigerian court and alleged that it was entitled to approximately the same damages for 1977 through 1984 despite the absence of any contract relating to those years. The Nigerian trial court issued a judgment in favor of the plaintiff of the alleged actual damages as well as pre-judgment interest of approximately USD 120 million. On appeal this decision was reversed on procedural grounds and remanded back to the trial court for further consideration. Aegon has no material assets located in Nigeria. In Poland, owners of unit-linked policies continue to file claims in civil court against Aegon over fees payable upon purchase or surrender of the product. Plaintiffs claim that these fees are not contractually supported. Aegon faces a significant number of these cases. For reasons of commercial necessity as well as at the instigation of the regulatory authorities, Aegon decided to modify the fee structure. As of 2017, a provision of EUR 20 million remains, which represents management’s best estimate of the exposure. The final amount may vary based on regulatory developments and the outcome of litigation. In the Netherlands, unit linked products (‘beleggingsverzekeringen’) have been controversial and the target of litigation since at least 2005. Allegations include excessive cost, unfair terms, inadequate disclosure, and failure to perform as illustrated. Consumer groups have formed to address these issues and initiate mass claims against insurers. Regulators as well as the Dutch Parliament have been involved ever since, with the principal goal of achieving an equitable resolution. Developments in similar cases against other Dutch insurers currently before regulators and courts may also affect Aegon. In September 2014, consumer interest group Vereniging Woekerpolis.nl filed a claim against Aegon in court. The claim related to a range of unit-linked products that Aegon sold in the past, including Aegon products involved in earlier litigation. The claim challenges a variety of elements of these products, on multiple legal grounds, including allegations made previously. This claim is being vigorously defended. In June 2017, the court issued a verdict which upheld the principle that disclosures must be evaluated according to the standards at the time when the relevant products were placed in force. Most of the claims of Vereniging Woekerpolis.nl were dismissed under this standard, although the court found that Aegon did not adequately disclose certain charges on a limited set of policies. This court decision has been appealed by both parties. Aegon expects the claims and litigation on unit linked products to continue for the foreseeable future. At this time, Aegon is unable to estimate the range or potential maximum liability. There can be no assurances that these matters, in the aggregate, will not ultimately result in a material adverse effect on Aegon’s business, results of operations and financial position. Securities leasing products (‘aandelenlease producten’) have also been the subject of litigation in the Netherlands. Although sales of securities leasing products ended more than a decade ago, litigation relating to these products has resurfaced. In 2016, the Dutch Supreme Court ruled on a case involving a securities leasing product sold by one of Aegon’s competitors. It decided that the financial institution was liable if a broker (‘remisier’) that advised on the sale of the institution’s products was not properly licensed. In July 2016, consumer interest group Platform Aandelenlease filed a claim against Aegon Bank regarding securities leasing product Sprintplan. Allegations include, among other things, a lack of a proper license of the brokers involved. Aegon defends itself vigorously against these claims. In October 2017, the district court of The Hague found in favor of Aegon that the Sprintplan liability had been conclusively determined in earlier proceedings and there were no grounds to hold further collective proceedings. The plaintiff appealed. The case is now pending at the court of appeal of The Hague. At this time, Aegon is unable to estimate the range or potential maximum liability. There can be no assurances that this matter will not ultimately result in a material adverse effect on Aegon’s business, results of operations and financial position.
Aegon N.V [member]
Commitments and contingencies	18 Commitments and contingencies Aegon N.V. has guaranteed and is severally liable for the following: ◆ Due and punctual payment of payables due under letter of credit agreements applied for by Aegon N.V. as co-applicant with its captive insurance companies that are subsidiaries of Transamerica Corporation and Commonwealth General Corporation. At December 31, 2017, the letter of credit arrangements utilized by captives to provide collateral to affiliates amounted to EUR 3,025 million (2016: EUR 3,720 million); as of that date no amounts had been drawn, or were due under these facilities. Other letter of credit arrangements for subsidiaries amounted to EUR 55 million (2016: EUR 104 million); as of that date no amounts had been drawn, or were due under these facilities; ◆ Due and punctual payment of payables due under letter of credit agreements or guarantees provided for subsidiaries of Transamerica Corporation at December 31, 2017 amounted to EUR 3,079 million (2016: EUR 3,563 million) as of that date no amounts had been drawn, or were due under letter of credit facilities. The guarantees partly related to debt amounted to EUR 1,322 million (2016: EUR 1,505 million) and is included in the Operational funding table in note 39 Borrowings of the consolidated financial statements of the Group in the line ‘USD 1.54 billion Variable Funding Surplus Note’; ◆ Due and punctual payment of payables by the consolidated group companies Transamerica Corporation, Aegon Funding Company LLC and Commonwealth General Corporation with respect to bonds, capital trust pass-through securities and notes issued under commercial paper programs amounted to EUR 585 million (2016: EUR 633 million); and ◆ Due and punctual payment of any amounts owed to third parties by the consolidated group company Aegon Derivatives N.V. in connection with derivative transactions. Aegon Derivatives N.V. only enters into derivative transactions with counterparties with which ISDA master netting agreements including collateral support annex agreements have been agreed; net (credit) exposure on derivative transactions with these counterparties was therefore limited as of December 31, 2017.

Transfers of financial assets

Transfers of financial assets	12 Months Ended
	Dec. 31, 2017
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Transfers of financial assets	49 Transfers of financial assets Transfers of financial assets occur when Aegon transfers contractual rights to receive cash flows of financial assets or when Aegon retains the contractual rights to receive the cash flows of the transferred financial asset, but assumes a contractual obligation to pay the cash flows to one or more recipients in that arrangement. In the normal course of business Aegon is involved in the following transactions: ◆ Transferred financial assets that are not derecognized in their entirety: ◆ Securities lending; whereby Aegon legally (but not economically) transfers assets and receives cash and non-cash collateral. The transferred assets are not derecognized. The obligation to repay the cash collateral is recognized as a liability. The non-cash collateral is not recognized in the statement of financial position; and ◆ Repurchase activities; whereby Aegon receives cash for the transferred assets. The financial assets are legally (but not economically) transferred, but are not derecognized. The obligation to repay the cash received is recognized as a liability. ◆ Transferred financial assets that are derecognized in their entirety and Aegon does not have a continuing involvement (normal sale); ◆ Transferred financial assets that are derecognized in their entirety, but where Aegon has a continuing involvement; ◆ Collateral accepted in the case of securities lending, reverse repurchase agreement and derivative transactions; and ◆ Collateral pledged in the case of (contingent) liabilities, repurchase agreements, securities borrowing and derivative transactions. The following disclosures provide details for transferred financial assets that are not derecognized in their entirety, transferred financial asset that are derecognized in their entirety, but where Aegon has a continuing involvement and assets accepted and pledged as collateral. 49.1 Transferred financial assets that have not been derecognized in their entirety The following table reflects the carrying amount of financial assets that have been transferred to another party in such a way that part or all of the transferred financial assets do not qualify for derecognition. Furthermore, it reflects the carrying amounts of the associated liabilities. 2017 Available-for-sale financial assets Financial assets at fair value through Shares Debt securities Debt securities Investments for Carrying amount of transferred assets 114 5.805 54 384 Carrying amount of associated liabilities 122 5,929 55 93 2016 Available-for-sale financial assets Financial assets at fair value through Shares Debt securities Debt securities Investments for Carrying amount of transferred assets 226 5,298 20 194 Carrying amount of associated liabilities 242 5,400 21 204 Securities lending and repurchase activities The table above includes financial assets that have been transferred to another party under securities lending and repurchase activities. Aegon retains substantially all risks and rewards of those transferred assets, this includes credit risk, settlement risk, country risk and market risk. The assets are transferred in return for cash collateral or other financial assets. Non-cash collateral is not recognized in the statement of financial position. Cash collateral is recorded on the statement of financial position as an asset and an offsetting liability is established for the same amount as Aegon is obligated to return this amount upon termination of the lending arrangement. Cash collateral is usually invested in pre-designated high quality investments. The sum of cash and non-cash collateral is typically greater than the market value of the related securities loaned. Refer to note 49.3 Assets accepted and note 49.4 Assets pledged for an analysis of collateral accepted and pledged in relation to securities lending and repurchase agreements. 49.2 Transferred financial assets that are derecognized in their entirety, but where Aegon has continuing involvement Aegon has no transferred financial assets with continuing involvement that are derecognized in their entirely as per year-end 2017 and 2016. 49.3 Assets accepted Aegon receives collateral related to securities lending, reverse repurchase activities and derivative transactions. Non-cash collateral is not recognized in the statement of financial position. To the extent that cash is paid for reverse repurchase agreements, a receivable is recognized for the corresponding amount. The following tables present the fair value of the assets received in relation to securities lending and reverse repurchase activities: Securities lending 2017 2016 Carrying amount of transferred financial assets 4,987 4,262 Fair value of cash collateral received 3,277 3,633 Fair value of non-cash collateral received 1,847 1,077 Net exposure (138 ) (448 ) Non-cash collateral that can be sold or repledged in the absence of default 1,550 991 Non-cash collateral that has been sold or transferred - - Reverse repurchase agreements 2017 2016 Cash paid for reverse repurchase agreements 4,859 4,075 Fair value of non-cash collateral received 4,885 4,103 Net exposure (25 ) (27 ) Non-cash collateral that can be sold or repledged in the absence of default 4,166 3,288 Non-cash collateral that has been sold or transferred - - The above items are conducted under terms that are usual and customary to standard securities lending activities, as well as requirements determined by exchanges where the bank acts as intermediary. In addition, Aegon can receive collateral related to derivative transactions that it enters into. The credit support agreement will normally dictate the threshold over which collateral needs to be pledged by Aegon or its counterparty. Transactions requiring Aegon or its counterparty to post collateral are typically the result of over-the-counter derivative trades, comprised mostly of interest rate swaps, currency swaps and credit swaps. Refer to the credit risk section in note 4 Financial risks for details on collateral received for derivative transactions. 49.4 Assets pledged Aegon pledges assets that are on its statement of financial position in securities borrowing transactions, in repurchase transactions, in derivative transactions and against long-term borrowings. In addition, in order to trade derivatives on the various exchanges, Aegon posts margin as collateral. These transactions are conducted under terms that are usual and customary to standard long-term borrowing, derivative and securities borrowing activities, as well as requirements determined by exchanges where the bank acts as intermediary. Non-cash financial assets that are borrowed or purchased under agreement to resell are not recognized in the statement of financial position. To the extent that cash collateral is paid, a receivable is recognized for the corresponding amount. If other non-cash financial assets are given as collateral, these are not derecognized. The following tables present the carrying amount of collateral pledged and the corresponding amounts. Assets pledged for general account and contingent liabilities 2017 2016 General account (contingent) liabilities 5,588 6,440 Collateral pledged 6,951 8,115 Net exposure (1,363 ) (1,675 ) Non-cash collateral that can be sold or repledged by the counterparty - - Assets pledged for repurchase agreements 2017 2016 Cash received on repurchase agreements 1,373 1,489 Collateral pledged (transferred financial assets) 1,370 1,477 Net exposure 3 12 As part of Aegon’s mortgage loan funding program in the Netherlands, EUR 6.5 billion (2016: EUR 6.8 billion) has been pledged as security for notes issued (note 39 Borrowings). In addition, in order to trade derivatives on the various exchanges, Aegon posts margin as collateral. The amount of collateral pledged for derivative transactions was EUR 2,234 million (2016: EUR 2,688 million).

Offsetting, enforceable master

Offsetting, enforceable master netting arrangements and similar agreements	12 Months Ended
	Dec. 31, 2017
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Offsetting, enforceable master netting arrangements and similar agreements	50 Offsetting, enforceable master netting arrangements and similar agreements The following table includes financial instruments that are set off in the statement of financial position. In addition, it includes financial instruments that are subject to a legally enforceable master netting arrangement or similar agreements, not set off in the financial statements. The table provides details relating to the effect, or potential effect, of netting arrangements, including rights to set-off, associated with the entity’s recognized financial assets and recognized financial liabilities. Gross amounts Gross amounts Net amounts of Related amounts not set off in position Net amount Financial assets subject to offsetting, enforceable master netting arrangements and similar agreements Financial Cash collateral received 2017 Derivatives 5,823 - 5,823 4,973 821 30 At December 31 5,823 - 5,823 4,973 821 30 2016 Derivatives 8,114 - 8,114 6,427 1,486 201 At December 31 8,114 - 8,114 6,427 1,486 201 Gross amounts Gross amounts Net amounts of Related amounts not set off in position Net amount Financial liabilities subject to offsetting, enforceable master netting arrangements and similar agreements Financial Cash collateral 2017 Derivatives 5,185 - 5,185 5,145 2 38 At December 31 5,185 - 5,185 5,145 2 38 2016 Derivatives 6,689 - 6,689 6,570 20 99 At December 31 6,689 - 6,689 6,570 20 99 Financial assets and liabilities are offset in the statement of financial position when the Group has a legally enforceable right to offset and has the intention to settle the asset and liability on a net basis, or to realize the asset and settle the liability simultaneously. As shown in the second column there are no financial assets and liabilities offset in 2017 and 2016. The line Derivatives includes derivatives for general account and for account of policyholder. Aegon mitigates credit risk in derivative contracts by entering into collateral agreements, where practical, and in ISDA master netting agreements for each of the Aegon’s legal entities to facilitate Aegon’s right to offset credit risk exposure. The credit support agreement will normally dictate the threshold over which collateral needs to be pledged by Aegon or its counterparty. Transactions requiring Aegon or its counterparty to post collateral are typically the result of over-the-counter derivative trades, comprised mostly of interest rate swaps, currency swaps and credit swaps. These transactions are conducted under terms that are usual and customary to standard long-term borrowing, derivative, securities lending and securities borrowing activities, as well as requirements determined by exchanges where the bank acts as intermediary.

Business combinations

Business combinations	12 Months Ended
	Dec. 31, 2017
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Business combinations	51 Business combinations Acquisitions 2017 On January 1, 2017, Aegon completed the acquisition of Cofunds Ltd., following regulatory approval. The purchase of the Cofunds Ltd. business was done through a sale and purchase agreement to acquire all the shares and platform assets. The total consideration of the acquisition amounted to GBP 147 million (EUR 171 million). The fair value of the net assets amounted to GBP 99 million (EUR 116 million), of which GBP 25 million (EUR 29 million) related to “customer intangibles”, resulting in goodwill of GBP 48 million (EUR 56 million). The value of the transferred customer investments under management as per January 1, 2017 amounted to approximately GBP 82 billion (EUR 96 billion) and is not recognized on Aegon’s statement of financial position. On August 2, 2017, Aegon Poland has received approval by the Polish Financial Supervision Authority to take over the management of the Nordea second-pillar pension fund. The value of the transferred net assets of Nordea to Aegon Poland as per June 30, 2017 amounted to approximately PLN 8.1 billion (EUR 1.9 billion). 2016 On May 3, 2016, Aegon announced it has agreed to buy BlackRock’s UK defined contribution (DC) platform and administration business. Under the purchase agreement, Aegon will acquire approximately GBP 12 billion (EUR 15 billion) of assets and 350,000 customers from BlackRock, which serves institutional and retail clients. The transaction is subject to a Part VII transfer of the underlying assets and liabilities to Aegon, which is subject to regulatory and court approval. On August 11, 2016 Aegon announced the acquisition of Cofunds from Legal & General for GBP 140 million (EUR 164 million). The purchase of the Cofunds Ltd business is done through a sale and purchase agreement to acquire all the shares and platform assets. On January 1, 2017 Aegon completed the acquisition of Cofunds, following regulatory approval. 2015 On June 4, 2015 Aegon completed a strategic asset management partnership with La Banque Postale. Under the terms of the agreement, Aegon has acquired a 25% stake in La Banque Postale Asset Management (LBPAM) for a consideration of EUR 117 million. On September 25, 2015, Aegon announced that it has acquired Mercer’s US defined contribution record-keeping business. On December 31, 2015, Aegon completed the acquisition after obtaining regulatory approval. The total purchase price amounted to EUR 70 million (USD 78 million), consisting of EUR 64 million (USD 71 million) cash and EUR 6 million (USD 7 million) contingent consideration. Cash position of Mercer amounts to nil on acquisition date. On December 7, 2015, Aegon announced that it has increased its investment in Aegon Religare Life Insurance Company ARLI from 26 percent to 49 percent. The company has been renamed as Aegon Life Insurance Company Ltd. Divestments/Disposals 2017 On June 28, 2017, Aegon completed its transaction to divest its two largest run-off businesses in the Americas, the payout annuity business and Bank Owned Life Insurance/ Corporate Owned Life Insurance business (BOLI/COLI). Under the terms of the agreement, Aegon’s Transamerica life subsidiaries has reinsured USD 14 billion of liabilities. The transaction resulted in a book gain of USD 250 million (EUR 231 million), reported in the line other income in the condensed consolidated income statement. The book gain consisted of a loss on the reinsurance transaction which is more than offset by the reclassification of gains from Other Comprehensive Income following the disposal of assets to fund the transaction. The loss on the reinsurance transaction amounted to USD 1,813 million (EUR 1,675 million) being the difference of the reinsurance premium paid and the reinsurance asset received related to the insurance liabilities. Upon disposal an amount of USD 979 million (EUR 905 million) and USD 1,018 million (EUR 941 million) respectively related to revaluation reserves and cash flow hedging reserves has been reclassified from Other Comprehensive Income into the income statement. Gains on sale of certain assets carried at amortized cost backing the insurance liabilities amount to USD 94 million (EUR 87 million). Other expenses related to the transaction, including cost of sale, amounted to USD 28 million (EUR 26 million). On June 30, 2017, following court approval on the Part VII transfer, the sale of the annuity portfolio to Rothesay Life has been completed. On September 22, 2017, following court approval on the Part VII transfer, the sale of the annuity portfolio to Legal & General has been completed. On August 9, 2017, Aegon agreed to sell Aegon Ireland plc. The sales price will amount to 81% of the Solvency II Own Funds of Aegon Ireland at the end of 2017. This transaction further optimizes its portfolio of businesses. As the transaction is contingent on certain closing and market conditions until closing of the transaction, the book loss is uncertain. This divestment is expected to have an immaterial impact on income before tax and underlying earnings before tax going forward. The transaction is subject to customary regulatory approvals and is expected to close in the first half of 2018. On November 1, 2017, Aegon completed the sale of Unirobe Meeùs Groep (UMG), an independent financial advisory group, for a total consideration of EUR 295 million. The divestment led to a book gain of EUR 208 million, which was reported in Other income in the fourth quarter. As a consequence of this transaction annual income before tax and underlying earnings before tax will decrease by approximately EUR 20 million going forward from the 2017 level. On December 28, 2017, Aegon agreed to divest a block of life reinsurance business and to dissolve a related captive insurance company. Under the terms of the agreement, Aegon’s Transamerica life subsidiaries reinsured approximately USD 750 million of liabilities. The transaction covers approximately half of the life reinsurance business that Transamerica retained after it divested the vast majority of its life reinsurance business to SCOR in 2011. 2016 On January 18, 2016 Aegon Nederland N.V. sold its commercial non-life insurance business, which includes the proxy and coinsurance run-off portfolios. This business has an annual premium volume of approximately EUR 90 million. The total insurance liabilities from this business are EUR 334 million while the consideration paid in cash was EUR 302 million. The transaction was subsequently approved by the Dutch Central Bank (De Nederlandsche Bank) and the Dutch Authority for Consumers and Markets (Autoriteit Consument & Markt). Aegon completed the sale on July 1, 2016, which resulted in a gain of EUR 11 million. On May 13, 2016, Aegon completed the sale of certain assets of Transamerica Financial Advisors, a full service independent broker-dealer and registered investment adviser, following regulatory approval. The consideration received for the sale consisted of USD 49 million (EUR 44 million) cash and USD 14 million (EUR 13 million) of contingent consideration which is subject to a 12 month earn-out period. The transaction resulted in a pre tax gain of USD 58 million (EUR 52 million) recorded in the second quarter of 2016. In the second quarter of 2016 Aegon sold its UK annuity portfolio in two parts. On April 11, 2016 Aegon announced the sale of around GBP 6 billion of the portfolio to Rothesay Life. On May 23, 2016 Aegon announced the sale of around GBP 3 billion of the portfolio to Legal & General. Aegon incurred a book loss on the transaction before tax of GBP 530 million (EUR 682 million), reported in the line other charges in the consolidated income statement. The transaction resulted in a tax benefit of GBP 41 million (EUR 53 million). Under the terms of the agreements, Aegon reinsured GBP 6.8 billion of liabilities to Rothesay Life and Legal & General, followed by a Part VII transfer 1 On December 16, 2016, Aegon completed the sale of 100% of its shares of Aegon Life Ukraine to TAS Group, and exited the Ukrainian market. This transaction has no material impact on the consolidated numbers of Aegon. 2015 On March 3, 2015, Aegon completed the sale of its 35% share in La Mondiale Participations following the granting of approval by the French Competition Authority (Autorité de la Concurrence). The agreement to sell Aegon’s stake in La Mondiale Participations to La Mondiale for EUR 350 million was announced on November 24, 2014. Proceeds from the sale were added to Aegon’s excess cash buffer, and increased the group’s Insurance Group Directive (IGD) solvency ratio by over 4 percentage points at the time of the sale. On July 31, 2015, Aegon completed the sale of its Canadian life insurance business following regulatory approval. The agreement to sell Aegon’s Canadian life insurance business for an amount of CAD 600 million (EUR 428 million) was announced on October 16, 2014. The transaction resulted in a book loss of CAD 1,054 million (EUR 751 million) recorded and presented as part of ‘other charges’, please refer to Note 17 Other charges. Aegon used the proceeds of this transaction for the redemption of the USD 500 million 4.625% senior bond which was due in December 2015. The results of the Canadian operations reflect amounts previously recorded in Other Comprehensive Income that were reclassified into the income statement including CAD 178 million (EUR 127 million) release of the foreign currency translation reserve, CAD (72) million (EUR (51) million) release of the net foreign investment hedging reserve and CAD 668 million (EUR 476 million) for the release of the available for sale reserve. The net cash proceeds were CAD 543 million (EUR 387 million) consisting of CAD 600 million (EUR 428 million) cash received and the cash and cash equivalents included in the sale of CAD 57 million (EUR 41 million). Expenses related to the transaction, including cost of sale, amounted to CAD 11 million (EUR 8 million). On September 1, 2015, Aegon completed the sale of Clark Consulting following regulatory approval. The agreement to sell Clark Consulting for USD 177.5 million (EUR 160 million) was announced on July 10, 2015 and resulted in a gain of USD 8 million (EUR 7 million). The cash and cash equivalents included at the time of the sales amounted to USD 13 million (EUR 12 million). On September 7, 2015, Aegon completed the sale of its 25.1% share in platform provider and discretionary fund manager Seven Investment Management (7IM) for GBP 19 million (EUR 26 million). This transaction has led to a net gain of GBP 7 million (EUR 10 million). 7IM was recorded as an associate in the books of Aegon. 1 An insurance business transfer scheme under Part VII of the United Kingdom Financial Services and Markets Act 2000 allows an insurer to transfer policies as at a fixed time and date to another insurer, along with related contracts with other parties (including reinsurance).

Group companies

Group companies	12 Months Ended
	Dec. 31, 2017
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Group companies	52 Group companies Subsidiaries The principal subsidiaries of the parent company Aegon N.V. are listed by geographical segment. All are wholly owned, directly or indirectly, unless stated otherwise, and are involved in insurance or reinsurance business, asset management or services related to these activities. The voting power in these subsidiaries held by Aegon is equal to the shareholdings. Americas ◆ Transamerica Advisors Life Insurance Company, Little Rock, Arkansas (United States); ◆ Transamerica Casualty Insurance Company, Columbus, Ohio (United States); ◆ Transamerica Corporation, Wilmington, Delaware (United States); ◆ Transamerica Financial Life Insurance Company, Albany, New York (United States); ◆ Transamerica Life Insurance Company, Cedar Rapids, Iowa (United States); ◆ Transamerica Premier Life Insurance Company, Cedar Rapids, Iowa (United States). The Netherlands ◆ Aegon Bank N.V., The Hague; ◆ Aegon Hypotheken B.V., The Hague; ◆ Aegon Levensverzekering N.V., The Hague; ◆ Aegon Schadeverzekering N.V., The Hague; ◆ Aegon Spaarkas N.V., The Hague; ◆ Optas Pensioenen N.V., Rotterdam; ◆ TKP Pensioen B.V., Groningen; ◆ Unirobe Meeùs Groep B.V., The Hague (until November 1, 2017); ◆ Aegon PPI B.V., The Hague; ◆ CAPPITAL Premiepensioeninstelling B.V., Groningen. United Kingdom ◆ Aegon Investment Solutions Ltd., Edinburgh; ◆ Scottish Equitable plc, Edinburgh; ◆ Cofunds Limited, London. Central & Eastern Europe ◆ Aegon Magyarország Általános Biztosító Zártkőrűen Működő Részvénytársaság, Budapest (Aegon Hungary Composite Insurance Co.); ◆ Aegon Towarzystwo Ubezpieczeń na Życie Spółka Akcyjna, Warsaw (Aegon Poland Life); ◆ Aegon Powszechne Towarzystwo Emerytaine Spólka Akcyjna, Warsaw (Aegon Poland Pension Fund Management Co.); ◆ Aegon Emeklilik ve Hayat A.Ş., Istanbul (Aegon Turkey); ◆ Aegon Pensii Societate de Administrare a Fondurilor de Pensii Private S.A., Cluj (Aegon Romania Pension Administrator Co.); ◆ Aegon Pojištovna, a.s., Prague (Aegon Czech Life); ◆ Aegon Životná poist’ovňa, a.s., Bratislava (Aegon Slovakia Life); ◆ Aegon, d.s.s., a.s., Bratislava (Aegon Slovakia Pension Management Co.). Spain & Portugal ◆ Aegon España S.A.U. de Seguros y Reaseguros, Madrid (Spain); ◆ Aegon Administracion y Servicios A.I.E., Madrid (Spain); ◆ Aegon Activos A.V., S.A., Madrid (Spain); ◆ Aegon Mediacion, S.L.U, Madrid (Spain). Asia ◆ Transamerica Life (Bermuda) Ltd., Hamilton (Bermuda); ◆ Aegon Insights Limited, Hong Kong (Hong Kong). Asset Management ◆ Aegon Asset Management Holding B.V., The Hague (The Netherlands); ◆ Aegon Custody BV, The Hague (The Netherlands); ◆ Aegon Asset Management Pan-Europe B.V., The Hague (The Netherlands); ◆ Kames Capital plc, Edinburgh (United Kingdom); ◆ TKP Investments B.V., Groningen (The Netherlands); ◆ Aegon USA Investment Management, LLC, Cedar Rapids (United States); ◆ Aegon USA Realty Advisors, LLC, Des Moines (United States); ◆ Aegon Magyarország Befektetési Alapkezelő Zártkőrűen Műkődő Részvénytársaság (Aegon Hungary Asset Management Company ZrtA), Budapest (Hungary); ◆ Aegon Investment Management B.V, The Hague (The Netherlands). The legally required list of participations as set forth in articles 379 and 414 of Book 2 of the Dutch Civil Code has been registered with the Trade Register in The Hague. Aegon N.V. has issued a statement of liability as meant in article 403 of Book 2 of the Dutch Civil Code for its subsidiary company Aegon Derivatives N.V. Joint ventures The principal joint ventures are listed by geographical segment. The voting power in these joint ventures is equal to the shareholdings except for Akaan where Aegon has 50% of the voting power. Americas ◆ Akaan-Aegon, S.A.P.I. de C.V., Mexico City (Mexico), (99.99%). The Netherlands ◆ AMVEST Vastgoed B.V., Utrecht (50%), property management and development. Spain & Portugal ◆ Santander Generales Seguros y Reaseguros, S.A., Madrid (Spain), (51%); ◆ Aegon Santander Portugal Vida – Companhia de Seguros de Vida S.A., Lisbon (Portugal), (51%); ◆ Aegon Santander Portugal Não Vida – Companhia de Seguros S.A., Lisbon (Portugal), (51%); ◆ Santander Vida Seguros y Reaseguros, S.A., Madrid (Spain), (51%); ◆ Liberbank Vida y Pensiones, Seguros y Reaseguros, S.A., Oviedo (Spain), (50%). Asia ◆ Aegon Sony Life Insurance Co., Tokyo (Japan), (50%); ◆ Aegon THTF Life Insurance Co., Ltd., Shanghai (China), (50%); ◆ SA Reinsurance Ltd, Hamilton (Bermuda), (50%). Asset Management ◆ Aegon Industrial Fund Management Co., Ltd, Shanghai (China), (49%). Refer to note 26 Investments in joint ventures for further details on these investments. Investments in associates The principal investments in associates are listed by geographical segment. The voting power in these associates is equal to the shareholdings. Americas ◆ Mongeral Aegon, Seguros e Previdencia S.A., Rio de Janeiro (Brazil), (50%). Asset Management ◆ La Banque Postale Asset Management, Paris (France), (25%). Refer to note 27 Investments in associates for further details on these investments.

Related party transactions

Related party transactions	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Related party transactions	53 Related party transactions In the normal course of business, Aegon enters into various transactions with related parties. Parties are considered to be related if one party has the ability to control or exercise significant influence over the other party in making financial or operating decisions. Related parties of Aegon include, amongst others, its associates, joint ventures, key management personnel and the defined benefit and contribution plans. Transactions between related parties have taken place on an arm’s length basis. Transactions between Aegon and its subsidiaries that are deemed related parties have been eliminated in the consolidation and are not disclosed in the notes. Related party transactions include, among others, transactions between Aegon N.V. and Vereniging Aegon. On December 19, 2017 Aegon N.V. repurchased 13,042,592 common shares B from Vereniging Aegon for the amount of EUR 1,725,169.73 based on 1/40th of the Value Weight Average Price of the common shares of the five trading days preceding this transaction. The repurchase of common shares B was executed to align the aggregate shareholding of Vereniging Aegon in Aegon N.V. with its special cause voting rights of 32.6% following the completion of the Share Buy Back Program, initiated by Aegon N.V. in October 2017 to neutralize the dilutive effect of the distribution of final dividend 2016 in stock and interim dividend 2017 in stock. On June 23, 2017, Vereniging Aegon exercised its options rights to purchase in aggregate 13,042,612 common shares B at fair value of a common share B (being 1/40th of the market value of a common share in the capital of the Company at the time of issuance) to mitigate dilution caused by Aegon’s issuance of shares on June 23, 2017, being the final dividend 2016 in the form of stock dividend. On May 19, 2017, Vereniging Aegon exercised its options rights to purchase in aggregate 1,979,260 common shares B at fair value of a common share B (being 1/40th of the market value of a common share in the capital of the Company at the time of issuance) to mitigate dilution caused the issuance of shares on May 19, 2017, in connection with the Long Term Incentive Plans for senior management. On June 6, 2016 Aegon N.V. repurchased 17,324,960 common shares B from Vereniging Aegon for the amount of EUR 1,968,332, based on 1/40th of the Value Weight Average Price of the common shares of the 5 trading days preceding this transaction. The repurchase of common shares B was executed to align the aggregate shareholding of Vereniging Aegon in Aegon N.V. with its special cause voting rights of 32.6%. On May 19, 2016 Aegon N.V. repurchased 13,450,835 common shares from Vereniging Aegon for the amount of EUR 58 million being the Value Weight Average Price of the common shares of the 5 trading days preceding this transaction, as part of the EUR 400 million Share Buy Back program, initiated by Aegon N.V. in January 2016 to neutralize the dilutive effect of the cancellation of Aegon N.V.’s preferred shares in 2013. Also the amount of EUR 58 million is 14.5% of EUR 400 million, which percentage is equal to the percentage of shares held by Vereniging Aegon in the total number of outstanding and voting shares Aegon N.V. at the time of this transaction. On November 13, 2015, Vereniging Aegon exercised its options rights to purchase in aggregate 760 common shares B at fair value of a common share B (being 1/40th of the market value of a common share in the capital of the Company at the time of issuance) to mitigate dilution caused by a correction to Aegon’s issuance of shares on May 21, 2015, in connection with the Long Term Incentive Plans for senior management. On May 21, 2015, Vereniging Aegon exercised its options rights to purchase in aggregate 3,686,000 common shares B at fair value of a common share B (being 1/40th of the market value of a common share in the capital of the Company at the time of issuance) to mitigate dilution caused by issuance of shares on May 21, 2015, in connection with the Long Term Incentive Plans for senior management. On January 1, 2015, Vereniging Aegon exercised its options rights to purchase in aggregate 9,680 common shares B at fair value of a common share B (being 1/40th of the market value of a common share in the capital of the Company at the time of issuance) to mitigate dilution caused by issuance of shares on January 1, 2015, in connection with the Long Term Incentive Plans for senior management. The Management Board, which assists the Executive Board in pursuing Aegon’s strategic goals, is formed by members of the Executive Board, the CEOs of Aegon USA, Aegon Continental Europe, Aegon UK, Aegon Asset Management, Chief Risk Officer, Chief Technology Officer, Global Head HR and General Counsel. In April 2017, the members of the Management Board decreased by one due to the retirement of the CEO of Aegon Central & Eastern Europe. The total remuneration for the members of the Management Board over 2017 was EUR 19.8 million (2016: EUR 18.6 million; 2015: EUR 15.2 million), consisting of EUR 7.4 million (2016: EUR 7.0 million; 2015: EUR 6.3 million) fixed compensation, EUR 7.8 million variable compensation awards (2016: EUR 6.4 million; 2015: EUR 4.9 million), EUR 0.9 million (2016: EUR 1.9 million; 2015: EUR 1.6 million) other benefits and EUR 3.7 million (2016: EUR 3.4 million; 2015: EUR 2.5 million) pension premiums. Amounts are reflective of time spent on the Management Board. Expenses as recognized under IFRS in the income statement for variable compensation and pensions differ from the variable compensation awards and pension premiums paid due to the accounting treatment under respectively IFRS 2 and IAS 19. IFRS expenses related to variable compensation amounted to EUR 6.3 million (2016: EUR 6.0 million; 2015: EUR 5.0 million) and EUR 3.7 million (2016: EUR 3.2 million; 2015: EUR 3.4 million) for pensions. Total IFRS expenses for the members of the Management Board over 2017 were EUR 18.3 million (2016: EUR 18.7 million; 2015: EUR 16.8 million). The amount is reflective of time spent on the Management Board. Additional information on the remuneration and share-based compensation of members of the Executive Board and the remuneration of the Supervisory Board is disclosed in the sections below (all amounts in EUR ‘000, except where indicated otherwise). Remuneration of members of the Executive Board The information below reflects the compensation and various related expenses for members of the Executive Board. Mr. Rider was appointed to the Executive Board for a term of four years by the shareholders on May 19, 2017 as CFO. Amounts and numbers are disclosed for the period Mr. Rider has been part of the Executive Board. Under the current remuneration structure, rewards are paid out over a number of years, or in the case of shares, vest over a number of years. This remuneration structure has made it more relevant to present rewards earned during a certain performance year instead of what was received in a certain year. Fixed compensation In EUR thousand 2017 2016 2015 Alex Wynaendts 1,269 1,269 1,154 Matt Rider 1) 560 - - Darryl Button - 933 991 Total fixed compensation 1,829 2,202 2,145 1 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Fixed compensation is disclosed for the period that Mr. Rider has been part of the Executive Board. The base salary of Mr Rider is EUR 900 thousand on an annualized basis. Conditional variable compensation awards In EUR thousand 2017 2016 2015 Alex Wynaendts 1,147 1,044 923 Matt Rider 1) 499 - - Darryl Button 2) - 747 784 Total conditional variable compensation awards 1,646 1,791 1,707 1 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Conditional variable compensation is disclosed for the period that Mr. Rider has been part of the Executive Board. 2 Mr. Button stepped down as CFO and member of Aegon’s Executive Board on December 1, 2016. Conditional variable compensation is disclosed for the period that Mr. Button has been part of the Executive Board and are reflective of his time with Aegon until December 1, 2016. Amounts are based on USD, converted to EUR, based on annual average exchange rates. Expenses recognized under IFRS accounting treatment in the income statement for Mr. Button for 2016 amount to EUR 1,237 (2015: EUR 995). The amounts in the table represent the conditional variable compensation awards earned during the related performance year. Expenses recognized under IFRS accounting treatment in the income statement for conditionally awarded cash and shares differ from the awards. For the performance year 2017 and previous performance years, expenses under IFRS for Mr. Wynaendts amounted to EUR 1,092 (2016: EUR 956; 2015: EUR 900). For Mr. Rider the expenses under IFRS amounted to EUR 293. 2017 Over the performance year 2017, Mr. Wynaendts was awarded EUR 1,147 in total conditional variable compensation. Mr. Rider was awarded EUR 499. Variable compensation is split 50/50 in a cash payment and an allocation of shares. Of the variable compensation related to performance year 2017, 40% is payable in 2018. Accordingly, Mr. Wynaendts and Mr. Rider will receive a cash payment of EUR 229 and EUR 100 respectively. The number of shares to be made available in 2018 relating to performance year 2017 is 43,732 and 19,017 for Mr. Wynaendts and Mr. Rider respectively. The vested shares, less the number of shares to cover for the payment of any applicable taxes, social security premiums and possible other deductions by the government due for which the Company holds a withholding obligation in connection with the vesting of the shares, are subject to a three year retention (holding) period, before they are at the disposal of the Executive Board members. The remaining part of variable compensation for the performance year 2017 (60%), for Mr. Wynaendts EUR 344 and 65,598 shares and for Mr. Rider EUR 150 and 28,522 shares, is to be paid out in equal portions in 2019, 2020 and 2021, subject to ex-post assessments, which may result in downward adjustments and may be subject to additional conditions being met. Any payout will be split 50/50 in a cash payment and an allocation of shares vesting. The vested shares, less the number of shares to cover for the payment of any applicable taxes, social security premiums and possible other deductions by the government due for which the Company holds a withholding obligation in connection with the vesting of the shares, are subject to a three year retention (holding) period, before they are at the disposal of the Executive Board members. Mr. Button has not been awarded variable compensation. 2016 Over the performance year 2016, Mr. Wynaendts was awarded EUR 1,044 in total conditional variable compensation. Mr. Button was awarded EUR 747. Variable compensation is split 50/50 in a cash payment and an allocation of shares. Of the variable compensation related to performance year 2016, 40% is payable in 2017. Accordingly, Mr. Wynaendts and Mr. Button will receive a cash payment of EUR 209 and EUR 149 respectively. The number of shares to be made available in 2017 relating to performance year 2016 is 40,722 and 29,614 for Mr. Wynaendts and Mr. Button respectively. The vested shares, less the number of shares to cover for the payment of any applicable taxes, social security premiums and possible other deductions by the government due for which the Company holds a withholding obligation in connection with the vesting of the shares, are subject to a three year retention (holding) period, before they are at the disposal of the Executive Board members. The remaining part of variable compensation for the performance year 2016 (60%), for Mr. Wynaendts EUR 313 and 61,083 shares and for Mr. Button EUR 224 and 44,424 shares, is to be paid out in equal portions in 2018, 2019 and 2020, subject to ex-post assessments, which may result in downward adjustments and may be subject to additional conditions being met. Any payout will be split 50/50 in a cash payment and an allocation of shares vesting. The vested shares, less the number of shares to cover for the payment of any applicable taxes, social security premiums and possible other deductions by the government due for which the Company holds a withholding obligation in connection with the vesting of the shares, are subject to a three year retention (holding) period, before they are at the disposal of the Executive Board members. 2015 Over the performance year 2015, Mr. Wynaendts was awarded EUR 923 in total conditional variable compensation. Mr. Button was awarded EUR 784. Variable compensation is split 50/50 in a cash payment and an allocation of shares. Of the variable compensation related to performance year 2015, 40% is payable in 2016. Accordingly, Mr. Wynaendts and Mr. Button will receive a cash payment of EUR 185 and EUR 157 respectively. The number of shares to be made available in 2016 relating to performance year 2015 is 30,219 and 23,621 for Mr. Wynaendts and Mr. Button respectively. The vested shares, less the number of shares to cover for the payment of any applicable taxes, social security premiums and possible other deductions by the government due for which the Company holds a withholding obligation in connection with the vesting of the shares, are subject to a three year retention (holding) period, before they are at the disposal of the Executive Board members. The remaining part of variable compensation for the performance year 2015 (60%), for Mr. Wynaendts EUR 277 and 45,330 shares and for Mr. Button EUR 235 and 35,433 shares, is to be paid out in equal portions in 2017, 2018 and 2019, subject to ex-post assessments, which may result in downward adjustments and may be subject to additional conditions being met. Any payout will be split 50/50 in a cash payment and an allocation of shares vesting. The vested shares, less the number of shares to cover for the payment of any applicable taxes, social security premiums and possible other deductions by the government due for which the Company holds a withholding obligation in connection with the vesting of the shares, are subject to a three year retention (holding) period, before they are at the disposal of the Executive Board members. The table below illustrates all the conditionally awarded cash and shares of the members of the Executive Board, and the years in which each component will be paid out and/or vest, subject to the conditions as mentioned: Conditional granted Timing of vesting, subject to targets and conditions Shares by reference period 2015 2016 2017 2018 2019 2020 2021 Alex Wynaendts 2007 9,253 8) - 9,253 - - - - - 2011 1) 17,304 17,304 - - - - - - 2012 2) 65,110 32,555 32,555 - - - - - 2013 3) 62,943 20,981 20,981 20,981 - - - - 2014 4) 67,761 27,105 13,552 13,552 13,552 - - - 2015 5) 75,549 - 30,219 15,110 15,110 15,110 - - 2016 6) 101,805 - - 40,722 20,361 20,361 20,361 - 2017 7) 109,330 - - - 43,732 21,866 21,866 21,866 Total number of shares 9) 509,055 97,945 106,560 90,365 92,755 57,337 42,227 21,866 Matt Rider 2017 7) 47,539 - - - 19,015 9,508 9,508 9,508 Total number of shares 9) 47,539 - - - 19,015 9,508 9,508 9,508 Darryl Button 2013 3) 28,716 9,572 9,572 9,572 - - - - 2014 4) 43,258 17,302 8,652 8,652 8,652 - - - 2015 5) 59,054 - 23,621 11,811 11,811 11,811 - - 2016 6) 74,038 - - 29,614 14,808 14,808 14,808 - 2017 7) - - - - - - - - Total number of shares 9) 205,066 26,874 41,845 59,649 35,271 26,619 14,808 - Jan J. Nooitgedagt 2011 1) 11,250 11,250 - - - - - - 2012 2) 44,740 22,370 22,370 - - - - - 2013 3) 26,478 8,826 8,826 8,826 - - - - Total number of shares 9) 82,468 42,446 31,196 8,826 - - - - Cash (in EUR) Alex Wynaendts 2011 81,795 81,795 - - - - - - 2012 203,536 101,768 101,768 - - - - - 2013 309,489 103,163 103,163 103,163 - - - - 2014 456,643 182,656 91,329 91,329 91,329 - - - 2015 461,305 - 184,522 92,261 92,261 92,261 - - 2016 522,060 - - 208,824 104,412 104,412 104,412 - 2017 573,550 - - - 229,420 114,710 114,710 114,710 Total cash 2,608,378 469,382 480,782 495,577 517,422 311,383 219,122 114,710 Matt Rider 2017 249,390 - - - 99,756 49,878 49,878 49,878 Total cash 249,390 - - - 99,756 49,878 49,878 49,878 CONTINUED > Conditional granted Timing of vesting, subject to targets and conditions Cash (in EUR) 2015 2016 2017 2018 2019 2020 2021 Darryl Button 2013 140,301 46,767 46,767 46,767 - - - - 2014 300,120 120,048 60,024 60,024 60,024 - - - 2015 392,155 - 156,862 78,431 78,431 78,431 - - 2016 373,369 - - 149,347 74,674 74,674 74,674 - 2017 - - - - - - - - Total cash 1,205,945 166,815 263,653 334,569 213,129 153,105 74,674 - Jan J. Nooitgedagt 2011 53,180 53,180 - - - - - - 2012 139,858 69,929 69,929 - - - - - 2013 130,188 43,396 43,396 43,396 - - - - Total cash 323,226 166,505 113,325 43,396 - - - - 1 The number of shares is based on a volume weighted average price of EUR 4.727. After vesting a 3 year holding period applies to shares vested. 2 The number of shares is based on a volume weighted average price of EUR 3.126. After vesting a 3 year holding period applies to shares vested. 3 The number of shares is based on a volume weighted average price of EUR 4.917. After vesting a 3 year holding period applies to shares vested. 4 The number of shares is based on a volume weighted average price of EUR 6.739. After vesting a 3 year holding period applies to shares vested. 5 The number of shares is based on a volume weighted average price of EUR 6.106. After vesting a 3 year holding period applies to shares vested. 6 The number of shares is based on a volume weighted average price of EUR 5.128 After vesting a 3 year holding period applies to shares vested. 7 The number of shares is based on a volume weighted average price of EUR 5.246 After vesting a 3 year holding period applies to shares vested. 8 During the vesting period, dividend payments on these shares are deposited in blocked savings accounts on behalf of the executive members. For active members of the Executive Board 50% of the shares vested in 2012 and 50% vested in 2016. 9 The shares that were allocated, vested with the acceptance of the Annual Accounts at the AGM in the year of vesting. The vesting price (in EUR) was: 7.2428 on 21 May 2015, 4.5020 on 20 May 2016, and 4.4230 on May 2017. Other benefits In EUR thousand 2017 2016 2015 Alex Wynaendts 165 178 151 Matt Rider 1) 59 - - Darryl Button 2) - 739 528 Total other benefits 224 917 679 1 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Other benefits are disclosed for the period that Mr. Rider has been part of the Executive Board. 2 Mr. Button stepped down as CFO and member of Aegon’s Executive Board on December 1, 2016. Other benefits are disclosed for the period that Mr. Button has been part of the Executive Board and are reflective of his time with Aegon December 1, 2016. These benefits also included expenses related to his expatriation and commuter assignment from the United States to the Netherlands, borne by the Group. Other benefits include non-monetary benefits (e.g. company car), social security contributions by the employer, and tax expenses borne by the Group. Pension contributions Pension contributions reflect the expenses related to the pension accrual over the financial year disclosed in the table, excluding back service charges. In EUR thousand 2017 2016 2015 Alex Wynaendts 1) 1,670 1,631 1,219 Matt Rider 2) 224 - - Darryl Button 3) - 375 215 Total pension contributions 1,894 2,006 1,434 1 The increase to the base pay of Mr. Wynaends, resulted in a backservice liability of EUR 1,361 in 2016 which is expensed over 2016-2019 (2016: EUR 416, 2017: EUR 432). 2 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Pension contributions are disclosed for the period that Mr. Rider has been part of the Executive Board. 3 Mr. Button stepped down as CFO and member of Aegon’s Executive Board on December 1, 2016. Pension contributions are disclosed for the period that Mr. Button has been part of the Executive Board and are reflective of his time with Aegon until December 1, 2016. Expenses recognized under IFRS accounting treatment in the income statement for Mr. Button for 2016 amount to EUR 375 (2015: EUR 215). The amounts as presented in the table are the pension contributions in the related book year. The 2017 and 2016 contributions for Mr. Wynaendts to the Aegon pension funds reflect the increase to his fixed salary in 2016 as well as the current low interest rates. Under IFRS, the service cost as recognized in the income statement related to the defined benefit obligation of Mr. Wynaendts amounted to EUR 1,733 (2016: EUR 1,666; 2015: EUR 1,962). Service cost for Mr. Rider amounted to EUR 175 (2016: nil; 2015: nil). Total The total amount of remuneration, consisting of the fixed compensation, conditional variable compensation awards, other benefits and pension contributions, for Mr. Wynaendts related to 2017 was EUR 4,683 (2016: EUR 4,538; 2015: EUR 3,446) and for Mr. Rider EUR 1,342. The total remuneration for the members of the Executive Board over 2017 was EUR 6.0 million (2016: EUR 7.3 million; 2015: EUR 6.0 million). Total expenses recognized under IFRS accounting treatment in the income statement for Mr. Wynaendts related to 2017 was EUR 4,258 (2016: EUR 4,086; 2015: EUR 4,167) and for Mr. Rider EUR 1,088 (2016: nil; 2015: nil). Total IFRS expenses for the members of the Executive Board over 2017 was EUR 5.3 million (2016: EUR 8.0 million; 2015: 7.1 million). As a result of the termination of the Board membership of Mr. Button in 2016, an additional Dutch employer wage tax was estimated at EUR 1,394 in 2016. In 2017 it turned out that based on the actual situation and the expected value of the deferred compensations no additional Dutch employer wage tax will be due. Interests in Aegon N.V. held by active members of the Executive Board Shares held in Aegon at December 31, 2017 by Mr. Wynaendts amount to 448,601 (2016: 401,948). Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Mr. Rider held no shares on December 31, 2017. The shares held in Aegon mentioned above do not exceed 1% of total outstanding share capital at the reporting date. At the reporting date no loans with Aegon or outstanding balances such as guarantees or advanced payments exist for either Mr. Wynaendts or Mr. Rider. Remuneration of active and retired members of the Supervisory Board In EUR 2017 2016 2015 Robert J. Routs 134,000 140,000 143,000 William L. Connelly (as of May 19, 2017) 60,125 - - Robert W. Dineen 104,000 115,000 121,000 Mark A. Ellman (as of May 19, 2017) 70,125 - - Ben J. Noteboom (as of May 20, 2015) 101,500 109,000 69,250 Ben van der Veer 106,000 109,000 115,000 Dirk P.M. Verbeek 100,000 111,000 112,125 Corien M. Wortmann-Kool 100,750 90,000 96,000 Dona D. Young 115,500 113,000 121,000 Total for active members 892,000 787,000 777,375 Leo M. van Wijk (up to May 20, 2015) - - 38,625 Irving W. Bailey, II (up to May 20, 2016) - 53,625 135,000 Shemaya Levy (up to May 19, 2017) 40,375 95,250 101,000 Total remuneration 932,375 935,875 1,052,000 VAT liable on Supervisory Board remuneration 195,799 196,534 220,920 Total 1,128,174 1,132,409 1,272,920 Aegon’s Supervisory Board members are entitled to the following: ◆ A base fee for membership of the Supervisory Board. No separate attendance fees are paid to members for attendance at the regular Supervisory Board meetings (2017: 7 meetings; 2016: 8 meetings; 2015: 7 meetings); ◆ An attendance fee of EUR 3,000 for each extra Board meeting attended, be it in person or by video and/or telephone conference; ◆ A committee fee for members on each of the Supervisory Board’s Committees; ◆ An attendance fee for each Committee meeting attended, be it in person or through video and/or telephone conference; and ◆ An additional fee for attending meetings that require intercontinental travel between the Supervisory Board member’s home location and the meeting location. Not included in the table above is a premium for state health insurance paid on behalf of Dutch Supervisory Board members. There are no outstanding balances such as loans, guarantees or advanced payments Common shares held by Supervisory Board members Shares held in Aegon at December 31 2017 2016 Robert W. Dineen 10,000 10,000 Ben J. Noteboom 23,500 23,500 Ben van der Veer 1,450 1,450 Dirk P.M. Verbeek 1,011 1,011 Dona D. Young 13,260 13,260 Total 49,221 49,221 Shares held by Supervisory Board members are only disclosed for the period for which they have been part of the Supervisory Board.

Events after the reporting peri

Events after the reporting period	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Events after the reporting period	54 Events after the reporting period On January 11, 2018, Aegon announced that its subsidiary in the Americas, Transamerica, has entered into an agreement with Tata Consultancy Services (TCS) to administer the company’s US insurance and annuity business lines. The agreement is expected to be completed by the second quarter of 2018.

Shares in group companies

Shares in group companies	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Shares in group companies	8 Shares in group companies 2017 2016 At January 1 22,219 23,992 Capital contributions and acquisitions 1,006 210 Divestments and capital repayments (698 ) (895 ) Dividend received (120 ) (181 ) Net income / (loss) for the financial year 2,511 533 Revaluations (1,799 ) (1,440 ) At December 31 23,117 22,219 For a list of names and locations of the most important group companies, refer to note 52 Group companies of the consolidated financial statements of the Group. The legally required list of participations as set forth in article 379 of Book 2 of the Netherlands Civil Code has been registered with the Commercial Register of The Hague.

Loans to group companies

Loans to group companies	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Loans to group companies	9 Loans to group companies 2017 2016 Loans to group companies – long-term At January 1 1,934 3,137 Additions / (repayments) (427 ) (1,248 ) Transfer to short term (829 ) - Other changes (239 ) 45 At December 31 439 1,934 Loans to group companies – short-term At January 1 2,189 1,392 Additions / (repayments) (563 ) 746 Transfer from long term 829 - Other changes (204 ) 51 At December 31 2,251 2,189 Total 2,690 4,123 The other changes in 2017 in Loans to group companies mainly relate to currency exchange rate fluctuations.

Receivables

Receivables	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Receivables	10 Receivables Receivables from group companies and other receivables have a maturity of less than one year. Other receivables include an income tax receivable of EUR 130 million (2016: EUR 219 million). Aegon N.V., together with certain of its subsidiaries, is part of a tax grouping for Dutch corporate income tax purposes. The members of the fiscal entity are jointly and severally liable for any taxes receivable or payable by the Dutch tax grouping.

Other assets

Other assets	12 Months Ended
	Dec. 31, 2017
Aegon N V [member]
Other assets	11 Other assets Other assets include derivatives with positive fair values of EUR 70 million (2016: EUR 135 million).

Share capital

Share capital	12 Months Ended
	Dec. 31, 2017
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Share capital	12 Share capital Issued and outstanding capital 2017 2016 Common shares 251 249 Common shares B 70 70 Total share capital 322 319 Common shares 2017 2016 Authorized share capital 720 720 Number of authorized shares (in million) 6,000 6,000 Par value in cents per share 12 12 Common shares B 2017 2016 Authorized share capital 360 360 Number of authorized shares (in million) 3,000 3,000 Par value in cents per share 12 12 All issued common shares and common shares B each have a nominal value of EUR 0.12 and are fully paid up. Repayment of capital can only be initiated by the Executive Board, is subject to approval of the Supervisory Board and must be resolved by the General Meeting of Shareholders. Moreover, repayment on common shares B needs approval of the related shareholders. Refer to Other information for further information on dividend rights. Vereniging Aegon, based in The Hague, the Netherlands, holds all of the issued and outstanding common shares B. On December 19, 2017, Aegon N.V. repurchased 13,042,592 common shares B from Vereniging Aegon for the amount of EUR 1,725,169.73 based on 1/40th of the Value Weight Average Price of the common shares of the five trading days preceding this transaction. The repurchase of common shares B was executed to align the aggregate shareholding of Vereniging Aegon in Aegon N.V. with its special cause voting rights of 32.6% following the completion of the Share Buy Back Program, initiated by Aegon N.V. in October 2017 to neutralize the dilutive effect of the distribution of final dividend 2016 in stock and interim dividend 2017 in stock. On June 23, 2017, Vereniging Aegon exercised its options rights to purchase in aggregate 13,042,612 common shares B at fair value of a common share B (based on 1/40th of the market value of a common share in the capital of the Company at the time of issuance) to mitigate dilution caused by Aegon’s issuance of shares on June 23, 2017, being the final dividend 2016 in the form of stock dividend. On May 19, 2017, Vereniging Aegon exercised its options rights to purchase in aggregate 1,979,260 common shares B at fair value of a common share B (based on 1/40th of the market value of a common share in the capital of the Company at the time of issuance) to mitigate dilution caused the issuance of shares on May 19, 2017, in connection with the Long Term Incentive Plans for senior management. In 2016, Vereniging Aegon decided not to exercise its option rights to purchase common shares B, since its special cause voting rights at the time of the issuance of shares in connection with the Long Term Incentive Plans for senior management already exceeded 32.6% due to the execution of the EUR 400 million Share Buyback program. As a consequence, such issuance of shares would not result in dilution of Vereniging Aegon’s voting rights. The following table shows the movement during the year in the number of common shares and common shares B: Common shares Common shares B Number of shares Total amount Number of shares Total amount At January 1, 2016 2,147,037 258 585,022 70 Dividend 10,629 1 - - Shares withdrawn (83,117 ) (10 ) - - At December 31, 2016 2,074,549 249 585,022 70 Dividend 21,099 3 - - At December 31, 2017 2,095,648 251 585,022 70 The following table shows the weighted average number of common shares and common shares B: Weighted Weighted 2016 2,129,074 585,022 2017 2,080,792 585,022 The shares repurchased by Aegon N.V. during the share-buy-back programs to undo the dilution caused by the distribution of dividend in stock, although included in the issued and outstanding number of shares, are excluded from the calculation of the weighted average number of shares. Long-term incentive plan, share appreciation rights and share options For detailed information on the Long Term Incentive Plans, share appreciation rights and share options granted to senior executives and other Aegon employees, refer to note 14 Commissions and expenses to the consolidated financial statements of the Group. Board remuneration Detailed information on remuneration of active and retired members of the Executive Board including their share and share option rights, remuneration of active and retired members of the Supervisory Board along with information about shares held in Aegon by the members of the Boards is included in note 53 Related party transactions to the consolidated financial statements of the Group.

Long-term borrowings

Long-term borrowings	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Long-term borrowings	16 Long-term borrowings 2017 2016 Remaining terms less than 1 year 500 500 Remaining terms 1 - 5 years 82 84 Remaining terms 5 - 10 years - - Remaining terms over 10 years 1,219 1,248 At December 31 1,801 1,832 The repayment periods of borrowings vary from within one year up to a maximum of 22 years. The interest rates vary from 0.000% to 6.625% per annum. The market value of the long-term borrowings amounted to EUR 2,198 million (2016: EUR 2,221 million).

Number of employees

Number of employees	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Number of employees	19 Number of employees There were no employees employed by Aegon N.V. in 2017 (2016:nil).

Auditor's remuneration

Auditor's remuneration	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Auditor's remuneration	20 Auditor’s remuneration Of which PricewaterhouseCoopers Total remuneration Accountants N.V. (NL) 2017 2016 2017 2016 Audit fees 42 27 13 9 Audit-related fees 3 3 1 1 Total 46 30 14 10 The total remuneration of the independent auditor has increased compared to last year. This increase is related to a contract renewal and to additional audit work that was provided, related to a model conversion in the US and to the conversion to IFRS 9 in the Netherlands. In addition, the total remuneration for 2016 did not yet include the fees for the audit of the 2016 Solvency II figures, as these fees were invoiced in and booked in 2017.

Events after the reporting pe70

Events after the reporting period	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Events after the reporting period	21 Events after the reporting period There were no events after the reporting period.

Proposal for profit appropriati

Proposal for profit appropriation	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Proposal for profit appropriation	22 Proposal for profit appropriation At the Annual General Meeting of Shareholders on May 18, 2018, the Executive Board will, absent unforeseen circumstances, propose a final dividend for 2017 of EUR 0.14 per common share and EUR 0.0035 per common share B. The final dividend will be paid in cash or stock at the election of the shareholder. The value of the stock dividend will be approximately equal to the cash dividend. If the proposed dividend is approved by shareholders, Aegon shares will be quoted ex-dividend on May 22, 2018, for the shares listed on the New York Stock Exchange and on May 22, 2018, for shares listed on Euronext. The record date for the dividend will be May 23, 2018. Shareholders can elect to receive a dividend in cash or in shares during the dividend election period, which will run from May 29, 2018 up to and including June 15, 2018. The dividend will be payable as of June 22, 2018. In order to reflect the prevailing market price of Aegon N.V. common shares fully within the indication provided, the number of dividend coupons that give entitlement to a new common share of EUR 0.12 (nominal value) will be determined on June 15, 2018 after 5.30 p.m. (CET), based on the average share price on Euronext Amsterdam in the five trading days from June 11, 2018 up to and including June 15, 2018. 2017 2016 Final dividend on common shares 286 265 Earnings to be retained 2,183 172 Net income attributable to owners of Aegon N.V. 2,469 437

Summary of investments other th

Summary of investments other than investments in related parties	12 Months Ended
	Dec. 31, 2017
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Summary of investments other than investments in related parties	Schedule I Summary of investments other than investments in related parties As at December 31, 2017 Amounts in million EUR Cost 1) Fair value Book value Shares: Available-for-sale 436 490 490 Fair value through profit or loss 1,021 1,062 1,062 Bonds: Available-for-sale and held-to-maturity: US government 8,011 8,846 8,846 Dutch government 4,799 5,781 5,781 Other government 11,746 12,568 12,568 Mortgage backed 7,326 7,694 7,694 Asset backed 4,624 4,698 4,698 Corporate 37,168 40,613 40,613 Money market investments 6,690 6,690 6,690 Other 765 791 791 Subtotal 81,130 87,681 87,681 Bonds: Fair value through profit or loss 4,150 4,144 4,144 Other investments at fair value through profit or loss 1,898 1,914 1,914 Mortgages 33,562 38,076 33,562 Private loans 3,642 4,181 3,642 Deposits with financial institutions 139 139 139 Policy loans 1,897 1,897 1,897 Other 127 127 127 Subtotal 39,368 44,422 39,368 Real estate: Investments in real estate 2,147 2,147 Total 141,858 136,804 1 Cost is defined as original cost for available-for-sale shares and amortized cost for available-for-sale and held-to-maturity bonds

Condensed financial information

Condensed financial information of registrant	12 Months Ended
	Dec. 31, 2017
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Condensed financial information of registrant	Schedule II Condensed financial information of registrant Statement of financial position of Aegon N.V. As at December 31 Before profit appropriation, amounts in EUR million Note 2017 2016 Non-current assets Financial fixed assets Shares in group companies 8 23,117 22,219 Loans to group companies 9 2,690 4,123 25,807 26,342 Current assets Receivables Receivables from group companies 10 36 80 Other receivables 10 146 219 Other 11 74 140 Accrued interest and rent 8 15 264 454 Cash and cash equivalents Cash and cash equivalents 1,068 879 Total assets 27,139 27,675 Shareholders’ equity Share capital 12 322 319 Paid-in surplus 13 7,731 7,873 Revaluation account 13 5,017 5,450 Remeasurement of defined benefit plans of group companies 13 (1,669 ) (1,820 ) Legal reserves – foreign currency translation reserve 13 (401 ) 1,316 Legal reserves in respect of group companies 13 1,122 1,169 Retained earnings, including treasury shares 13 5,696 5,776 Net income / (loss) 13 2,469 437 20,288 20,520 Other equity instruments 14 3,794 3,797 Total equity 24,082 24,318 Non-current liabilities Subordinated borrowings 15 764 767 Long-term borrowings 16 1,801 1,832 2,565 2,599 Current liabilities 17 Short term deposits 73 128 Loans from group companies 62 62 Payables to group companies 123 140 Deferred tax liability 89 159 Other 125 242 Accruals and deferred income 22 29 494 760 Total liabilities 3,059 3,359 Total equity and liabilities 27,139 27,675 Income statement of Aegon N.V. For the year ended December 31 Amounts in EUR million 2017 2016 2015 Net income / (loss) group companies 2,511 533 (394 ) Other income / (loss) (42 ) (96 ) (38 ) Net income / (loss) 2,469 437 (432 ) Condensed cash flow statement of Aegon N.V. For the year ended December 31 Amounts in EUR million 2017 2016 2015 Income / (loss) before tax 2,468 411 (454 ) Adjustments (3,676 ) (231 ) 1,920 Net cash flows from operating activities (1,208 ) 180 1,466 Dividends and capital repayments of subsidiaries, associates and joint ventures 700 895 - Other (1 ) (2 ) (5 ) Net cash flows from investing activities 700 893 (5 ) Issuance of treasury shares 2 - - Purchase of treasury shares (266 ) (623 ) (213 ) Dividends paid (294 ) (306 ) (292 ) Issuance, repurchase and coupons of perpetual securities (138 ) (140 ) (148 ) Issuance, repurchase and coupons of non-cumulative subordinated notes (37 ) (38 ) (38 ) Issuance and repurchase of borrowings 1,429 604 (1,115 ) Net cash flows from financing activities 696 (503 ) (1,806 ) Net increase / (decrease) in cash and cash equivalents 188 570 (346 ) Five-year schedule of maturities of debt As at December 31 2017 2016 Amounts in million EUR Subordi- Long-term Subordinated Long-term Remaining terms less than 1 year - 500 - 500 Remaining terms 1 - 2 years - 82 - - Remaining terms 2 - 3 years - - - 84 Remaining terms 3 - 4 years - - - - Remaining terms 4 - 5 years - - - - Remaining terms longer than 5 years 764 1,219 767 1,248 At December 31 764 1,801 767 1,832 Dividends from and capital contributions to business units Aegon received EUR 1.8 billion of dividends from its business units during 2017, mainly from Americas, United Kingdom, Asset Management, Central & Eastern Europe and Spain & Portugal. Capital contributions of EUR 1.1 billion were paid to Aegon’s businesses, mainly to the Netherlands. Aegon received EUR 1.1 billion of dividends from its business units during 2016 from the Americas, asset management, Central & Eastern Europe and Spain & Portugal. Aegon spent EUR 0.2 billion on capital contributions. Aegon received EUR 1.1 billion of dividends from its business units during 2015, almost all of which from the Americas. Aegon spent EUR 0.3 billion on capital contributions and acquisitions.

Supplementary insurance informa

Supplementary insurance information	12 Months Ended
	Dec. 31, 2017
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Supplementary insurance information	Schedule III Supplementary insurance information Column A Column B Column C Column D Column E Column F Segment Amounts in million EUR Deferred Future Unearned Other policy Premium 2017 Americas 8,188 171,122 5,241 1,982 9,383 The Netherlands 76 62,446 61 932 2,208 United Kingdom 903 65,052 14 6 9,635 Central & Eastern Europe 70 1,910 23 86 628 Spain & Portugal 1 796 - 15 155 Asia 490 4,969 100 15 816 Holding and other activities - 16 8 - 1 Total 9,729 306,311 5,447 3,036 22,826 2016 Americas 8,958 185,654 5,625 2,151 9,433 The Netherlands 84 63,526 59 977 2,491 United Kingdom 996 69,505 11 6 9,924 Central & Eastern Europe 71 1,905 18 75 578 Spain & Portugal 1 799 - 12 148 Asia 832 5,558 105 22 882 Holding and other activities - 16 4 - (2) Total 10,942 326,964 5,822 3,244 23,453 2015 Americas 8,330 177,742 4,977 1,991 9,195 The Netherlands 97 59,779 108 1,316 2,947 United Kingdom 1,264 83,417 12 5 8,512 Central & Eastern Europe 84 1,890 15 70 642 Spain & Portugal 1 797 - 10 133 Asia 745 4,127 88 20 1,494 Holding and other activities 9 89 2 1 2 Total 10,530 327,841 5,202 3,414 22,925 The numbers included in Schedule III are based on IFRS and excludes the proportionate share in Aegon’s joint ventures and Aegon’s associates. Deferred policy acquisition costs also include deferred costs of reinsurance. Column G Column H Column I Column J Column K Amounts in million EUR Net Benefits, Amortization Other Premiums 2017 Americas 3,362 8,585 552 2,953 6,387 The Netherlands 2,173 4,430 19 925 2,192 United Kingdom 1,516 11,796 111 646 9,266 Central & Eastern Europe 49 416 54 207 614 Spain & Portugal 31 153 - 93 150 Asia 203 153 33 95 778 Asset Management - - - 159 - Holding and other activities 5 5 - 76 8 Total 7,338 25,537 770 5,155 19,395 2016 Americas 3,711 8,913 576 3,438 6,824 The Netherlands 2,133 3,726 24 967 2,477 United Kingdom 1,661 12,618 148 518 9,331 Central & Eastern Europe 45 395 59 185 568 Spain & Portugal 36 143 - 90 143 Asia 196 130 31 111 927 Asset Management - - - 138 - Holding and other activities 6 3 - 66 7 Total 7,788 25,929 837 5,513 20,277 2015 Americas 3,672 8,240 593 3,357 6,643 The Netherlands 2,274 4,641 30 1,039 2,934 United Kingdom 2,331 11,541 319 588 8,038 Central & Eastern Europe 45 563 80 184 631 Spain & Portugal 34 151 - 74 128 Asia 165 119 30 128 1,564 Asset Management - - - 117 - Holding and other activities 4 2 3 57 7 Total 8,525 25,259 1,055 5,543 19,946

Reinsurance

Reinsurance	12 Months Ended
	Dec. 31, 2017
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Reinsurance	Schedule IV Reinsurance Amounts in million EUR Gross amount Ceded to Assumed Net amount % of amount net For the year ended December 31, 2017 Life insurance in force 863,686 709,326 525,201 679,561 77% Premiums Life insurance 18,324 3,214 1,628 16,738 10% Non-life insurance 2,849 217 25 2,657 1% Total premiums 21,174 3,431 1,653 19,395 9% For the year ended December 31, 2016 Life insurance in force 986,854 851,003 648,147 783,999 83% Premiums Life insurance 18,687 2,932 1,713 17,468 10% Non-life insurance 3,046 244 7 2,808 0% Total premiums 21,734 3,176 1,719 20,277 8% For the year ended December 31, 2015 Life insurance in force 1,008,787 961,485 658,594 705,896 93% Premiums Life insurance 17,971 2,694 1,612 16,889 10% Non-life insurance 3,332 286 11 3,057 0% Total premiums 21,302 2,979 1,623 19,946 8%

Valuation and qualifying accoun

Valuation and qualifying accounts	12 Months Ended
	Dec. 31, 2017
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Valuation and qualifying accounts	Schedule V Valuation and qualifying accounts Amounts in million EUR 2017 2016 2015 Balance at January 1 215 249 363 Addition charged to earnings 40 5 30 Amounts written off and other changes (37 ) (40 ) (152 ) Currency translation (5 ) 1 8 Balance at December 31 213 215 249 The provisions can be analyzed as follows: Mortgages 48 40 56 Other loans 116 97 86 Receivables 48 79 107 Total 213 215 249

Summary of significant accoun77

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2017
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Basis of presentation	2.1 Basis of presentation The consolidated financial statements have been prepared in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board (IFRS) and with Part 9 of Book 2 of the Netherlands Civil Code for purpose of reporting with the U.S. Securities and Exchange Commission (‘SEC’), including financial information contained in this Annual Report on Form 20-F. The consolidated financial statements have been prepared in accordance with the historical cost convention as modified by the revaluation of investment properties and those financial instruments (including derivatives) and financial liabilities that have been measured at fair value. Information on the standards and interpretations that were adopted in 2017 is provided below in note 2.1.1 Adoption of new IFRS accounting standards. The consolidated financial statements are presented in euro and all values are rounded to the nearest million unless otherwise stated. The consequence is that the rounded amounts may not add up to the rounded total in all cases. All ratios and variances are calculated using the underlying amount rather than the rounded amount. Certain amounts in prior years may have been reclassified to conform to the current year presentation. These reclassifications had no effect on net income, shareholders’ equity or earnings per share. The preparation of financial statements in conformity with IFRS requires management to make estimates and assumptions affecting the reported amounts of assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses for the reporting period. Those estimates are inherently subject to change and actual results could differ from those estimates. Included among the material (or potentially material) reported amounts and disclosures that require extensive use of estimates are: fair value of certain invested assets and derivatives, deferred policy acquisition costs, value of business acquired and other purchased intangible assets, goodwill, policyholder claims and benefits, insurance guarantees, pension plans, income taxes and the potential effects of resolving litigation matters. The consolidated financial statements of Aegon N.V. were approved by the Executive Board and by the Supervisory Board on March 22, 2018. The financial statements will be put for adoption to the Annual General Meeting of Shareholders on May 18, 2018. The shareholders’ meeting can decide not to adopt the financial statements but cannot amend them. Other then for SEC reporting, Aegon prepares its Annual Accounts under International Financial Reporting Standards as adopted by the European Union, including the decisions Aegon made with regard to the options available under International Financial Reporting Standards as adopted by the EU (IFRS-EU). IFRS-EU differs from IFRS in respect of certain paragraphs in IAS 39 ‘Financial Instruments: Recognition and Measurement’ regarding hedge accounting for portfolio hedges of interest rate risk (faitr value macro hedges) in accordance with the EU ‘carve out’version of IAS 39. Under IFRS, hedge accounting for fair value macro hedges cannot be applied to mortage loans and ineffectiveness arises whenever the revised estimate of the amount of cash flows in scheduled time buckets is either more or less than the original designated amount of that bucket. A reconciliation between IFRS and IFRS-EU is included in the table below. Shareholders’ equity Net income 2017 2016 2015 2017 2016 2015 In accordance with IFRS 20,288 20,520 22,441 2,469 438 (431 ) Adjustment of EU ‘IAS 39’ carve-out 368 510 315 (142 ) 195 (120 ) Tax effect of the adjustment (83 ) (117 ) (71 ) 34 (47 ) 27 Effect of the adjustment after tax 285 393 244 (108 ) 149 (92 ) In accordance with IFRS-EU 20,573 20,913 22,684 2,361 586 ` (523 ) 2.1.1 Adoption of new IFRS accounting standards New standards and amendments to standards become effective at the date specified by IFRS, but may allow companies to opt for an earlier adoption date. In 2017, the following amendments to existing standards issued by the IASB became mandatory, but are not currently relevant or do not significantly impact the financial position or financial statements: Accounting standard/ amendment/ interpretation IASB effective date Impact for Aegon IAS 7 Amendment Disclosure initiative January 1, 2017 Low IAS 12 Recognition of Deferred Tax Assets for Unrealised Losses January 1, 2017 Low Annual improvements 2014-2016 IFRS 12 Disclosure of interests in other entities January 1, 2017 Low 2.1.2 Future adoption of new IFRS accounting standards The following standards and amendments to existing standards, published prior to January 1, 2018, were not early adopted by the Group, but will be applied in future years: Accounting standard/ amendment/ interpretation IASB effective date Early adopted by Aegon Impact for Aegon IFRS 2 Clarifications of Classification an measurement of Share Based Payments Transactions January 1, 2018 No Low IFRS 9 Financial instruments, including the separate amendment applying IFRS 9 Financial instruments with IFRS 4 Insurance contracts January 1, 2018 (Aegon intends to make No See below for comments Amendment to IFRS 9 Financial instruments on prepayment features with negative compensation January 1, 2019 No See below for comments IFRS 15 Revenue from Contracts with Customers, including Clarifications to IFRS 15 as issued in 2016 January 1, 2018 No See below for comments IFRS 16 leases January 1, 2019 No See below for comments IFRS 17 Insurance contract January 1, 2021 No See below for comments IAS 40 Investment property, amendments regarding the transfer of property January 1, 2018 No Low IFRIC 22 Foreign currency transactions and advance consideration January 1, 2018 No Low IFRIC 23 Uncertainty over Tax Treatments January 1, 2019 No Low Annual improvements 2014-2016 IFRS 1, ‘First time adoption of IFRS’, regarding IFRS 7, IAS 19 and IFRS 10, IAS 28 Investments in associates and joint ventures January 1, 2018 No Low IFRS 9 Financial Instruments The IASB issued the complete version of IFRS 9 Financial Instruments in July 2014. IFRS 9 combines classification and measurement, the expected credit loss impairment model and hedge accounting. The standard will replace IAS 39 and all previous versions of IFRS 9. Under IFRS 9 Classification and Measurement, financial assets are measured at amortized cost, fair value through profit or loss or fair value through other comprehensive income, based on both the entity’s business model for managing the financial assets and the financial asset’s contractual cash flow characteristics. The classification and measurement of financial liabilities is unchanged from existing requirements apart from own credit risk. For financial liabilities that are designated at fair value through profit or loss, the changes which are attributable to the change in an entity’s own credit risk are presented in other comprehensive income, unless doing so would enlarge or create an accounting mismatch. For the impairment component, the IASB included requirements for a credit loss allowance or provision which should be based on expected losses rather than incurred losses. Application of IFRS 9 is required for annual periods beginning on or after January 1, 2018. However, on May 18, 2017, the IASB published the final version of the IFRS 17 Insurance Contracts standard. Prior to its finalization, the IASB issued an amendment to IFRS 4 Insurance Contracts (the predecessor standard to IFRS 17) that provides for a qualifying insurer a temporary exemption that permits, but does not require, the insurer to apply IAS 39 Financial Instruments: Recognition and Measurement rather than IFRS 9 for annual periods beginning before January 1, 2021 (i.e., a temporary exemption of IFRS 9). The objective of the amendment is to address the temporary accounting consequences of the different effective dates of IFRS 9 and IFRS 17. In order for an entity to be eligible for the temporary exemption it must have liabilities connected with insurance activities whose carrying value comprises either greater than 90% of the total carrying value of all liabilities or less than or equal to 90% but greater than 80%, and the insurer does not have significant activities unrelated to insurance. Aegon performed this analysis, and concluded that it meets the requirements for the temporary exception. As a result, Aegon will not implement IFRS 9 until January 1, 2021. As Aegon defers the application of IFRS 9 until 2021, the full impact of the standard is not yet clear, however an initial impact assessment resulted in the expectation that it will have a significant impact on shareholders’ equity, income and/or other comprehensive income and disclosures. An implementation project has started in 2017 and will be combined with the implementation of IFRS17 Insurance Contracts. IFRS 15 Revenue from Contracts with Customers In May 2014, the IASB issued IFRS 15 Revenue from Contracts with Customers. IFRS 15 will replace IAS 18 Revenue, as well as other interpretations issued by the IFRIC (International Financial Reporting Interpretations Committee) and SIC (Standing Interpretations Committee) regarding revenue unless the contracts are within the scope of other standards (for example, financial instruments, insurance contracts or lease contracts). The standard outlines the principles an entity shall apply to measure and recognize revenue and the related cash flows. The core principle is that an entity will recognize revenue at an amount that reflects the consideration to which the entity expects to be entitled in exchange for transferring goods or services to a customer. In April 2016, the IASB issued amendments to IFRS 15 to address several implementation issues discussed by the Transition Resource Group (TRG). The amendments are intended to clarify the requirements in IFRS 15, not to change the standard. IFRS 15 and the amendments is effective for the Group from January 1, 2018, using either of two methods: a full retrospective approach with certain practical expedients or a modified retrospective approach with the cumulative effect of initially applying this standard recognized at the date of initial application with certain additional disclosures. Aegon has evaluated the impact that adoption of this standard is expected to have on the Group’s financial statements and came to the conclusion that this impact will be very limited because insurance revenue is not in scope of IFRS 15 and because the other types of revenue are already materially compliant with this standard. Since IFRS 15 will have very limited impact on the Group’s financial statements, Aegon chose to apply the modified retrospective approach as transition method. IFRS 16 Leases IFRS 16 Leases which replaces IAS 17 has been issued by the IASB In January 2016. It will be mandatorily effective for annual reporting periods beginning on or after January 1, 2019. IFRS 16 introduces a single lessee accounting model and requires a lessee to recognize assets and liabilities for all leases with a term of more than 12 months, unless the underlying asset is of low value. A lessee is required to recognize a right-of-use asset representing its right to use the underlying leased asset and a lease liability representing its obligation to make lease payments. IFRS 16 substantially carries forward the lessor accounting requirements in IAS 17. Accordingly, a lessor continues to classify its leases as operating leases or finance leases, and to account for those two types of leases differently. Aegon is evaluating the impact that adoption of this Standard is expected to have on the Group’s financial statements. IFRS 17 Insurance Contracts The IASB issued IFRS 17 Insurance Contracts in May 2017. The Standard will replace IFRS 4, which was intended as an interim solution and allowed insurers to continue to use accounting principles that they had applied prior to the initial adoption of IFRS. IFRS 17 establishes principles for the recognition, measurement, presentation and disclosure of insurance contracts issued, reinsurance contracts held and investment contracts with discretionary participating features issued. The objective of the Standard is to ensure that entities provide relevant information in a way that faithfully represents those contracts. This information should provide users of financial statements with a basis to assess the effects that the contracts have on the financial position, financial performance and cash flows of the insurer. The Standard also specifies presentation and disclosure requirements to enhance comparability between insurance companies. IFRS 17 is effective for annual periods beginning on or after January 1, 2021. The Standard represents a fundamental change to current financial reporting and the implementation effort is expected to be significant. Early adoption of the standard is therefore not expected. An implementation project was started soon after the publication of the new Standard. Currently no choices have been made as to the accounting policy options provided in IFRS 17, however, it is expected that the impact of the initial application on Aegon’s financial statements is significant.
Basis of consolidation	2.2 Basis of consolidation Subsidiaries The consolidated financial statements include the financial statements of Aegon N.V. and its subsidiaries. Subsidiaries (including consolidated structured entities) are entities over which Aegon has control. Aegon controls an entity when Aegon is exposed, or has rights, to variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. The assessment of control is based on the substance of the relationship between the Group and the entity and, among other things, considers existing and potential voting rights that are substantive. For a right to be substantive, the holder must have the practical ability to exercise that right. The subsidiary’s assets, liabilities and contingent liabilities are measured at fair value on the acquisition date and are subsequently accounted for in accordance with the Group’s accounting policies, which is consistent with IFRS. Intra-group transactions, including Aegon N.V. shares held by subsidiaries, which are recognized as treasury shares in equity, are eliminated. Intra-group losses may indicate an impairment that requires recognition in the consolidated financial statements. Non-controlling interests are initially stated at their share in the fair value of the net assets on the acquisition date and subsequently adjusted for the non-controlling share in changes in the subsidiary’s equity. The excess of the consideration paid to acquire the interest and the fair value of any interest already owned, over the Group’s share in the net fair value of assets, liabilities and contingent liabilities acquired is recognized as goodwill. Negative goodwill is recognized directly in the income statement. If the fair value of the assets, liabilities and contingent liabilities acquired in the business combination has been determined provisionally, adjustments to these values resulting from the emergence of new evidence within 12 months after the acquisition date are made against goodwill. Aegon recognized contingent considerations either as provision or as financial liability depending on the characteristics. Contingent considerations recognized as provisions are discounted and the unwinding is recognized in the income statement as an interest expense. Any changes in the estimated value of contingent consideration given in a business combination are recognized in the income statement. Contingent considerations recognized as financial liabilities are measured at fair value through profit or loss. The identifiable assets, liabilities and contingent liabilities are stated at fair value when control is obtained. Subsidiaries are deconsolidated when control ceases to exist. Any difference between the net proceeds plus the fair value of any retained interest and the carrying amount of the subsidiary including non-controlling interests is recognized in the income statement. Transactions with non-controlling interests Transactions with non-controlling interests are accounted for as transactions with owners. Therefore disposals to non-controlling interests and acquisitions from non-controlling interests, not resulting in losing or gaining control of the subsidiary are recorded in equity. Any difference between consideration paid or received and the proportionate share in net assets is accounted for in equity attributable to shareholders of Aegon N.V. Investment funds Investment funds managed by the Group in which the Group holds an interest are consolidated in the financial statements if the Group has power over that investment fund and it is exposed, or has rights, to variable returns from its involvement with the investee and has the ability to affect those returns through its power over the investee. In assessing control, all interests held by the Group in the fund are considered, regardless of whether the financial risk related to the investment is borne by the Group or by the policyholders (unless a direct link between the policyholder and the fund can be assumed). In determining whether Aegon has power over an investment fund all facts and circumstances are considered, including the following: ◆ Control structure of the asset manager (i.e. whether an Aegon subsidiary); ◆ The investment constraints posed by investment mandate; ◆ Legal rights held by the policyholder to the separate assets in the investment vehicle (e.g. policyholders could have the voting rights related to these investments); ◆ The governance structure, such as an independent board of directors, representing the policyholders, which has substantive rights (e.g. to elect or remove the asset manager); and ◆ Rights held by other parties (e.g. voting rights of policyholders that are substantive or not). Exposure or rights to variability of returns can be the result of, for example: ◆ General account investment of Aegon; ◆ Aegon’s investments held for policyholder; ◆ Guarantees provided by Aegon on return of policyholders in specific investment vehicles; ◆ Fees dependent on fund value (including, but not limited to, asset management fees); and ◆ Fees dependent on performance of the fund (including, but not limited to, performance fees). Investment funds where Aegon acts as an agent are not consolidated due to lack of control of the funds. In particular, for some separate accounts, the independent board of directors has substantive rights and therefore Aegon does not have power over these separate accounts but acts as an agent. For limited partnerships, the assessment takes into account Aegon’s legal position (i.e. limited partner or general partner) and any substantive removal rights held by other parties. Professional judgment is applied concerning the substantiveness of the removal rights and the magnitude of the exposure to variable returns, leading to the conclusion that Aegon controls some, but not all, of the limited partnerships in which it participates. Upon consolidation of an investment fund, a liability is recognized to the extent that the Group is legally obliged to buy back participations held by third parties. The liability is presented in the consolidated financial statements as investment contracts for account of policyholders. Where no repurchase obligation exists, the participations held by third parties are presented as non-controlling interests in equity. The assets allocated to participations held by third parties or by the Group on behalf of policyholders are presented in the consolidated financial statements as investments for account of policyholders. Equity instruments issued by the Group that are held by investment funds are eliminated on consolidation. However, the elimination is reflected in equity and not in the measurement of the related financial liabilities towards policyholders or other third parties. Structured entities A structured entity is defined in IFRS 12 as “An entity that has been designed so that voting rights are not the dominant factor in deciding who controls the entity, such as when any voting rights relate to administrative tasks only and the relevant activities are directed by means of contractual arrangements.” In these instances the tests and indicators to assess control provided by IFRS 10 have more focus on the purpose and design of the investee (with relation to the relevant activities that most significantly affect the structured entity) and the exposure to variable returns, which for structured entities lies in interests through e.g. derivatives, and will not be focused on entities that are controlled by voting rights. Structured entities that are consolidated include certain mortgage backed securitization deals, where Aegon was involved in the design of the structured entities and also has the ability to use its power to affect the amount of the investee’s returns. Other factors that contribute to the conclusion that consolidation of these entities is required includes consideration of whether Aegon fully services the investees and can therefore influence the defaults of the mortgage portfolios and the fact that in these cases the majority of risks are maintained by Aegon. Structured entities that are not consolidated include general account investments in non-affiliated structured entities that are used for investment purposes. Non-current assets held for sale and disposal groups Disposal groups are classified as held for sale if they are available for immediate sale in their present condition, subject only to the customary sales terms of such assets and disposal groups and their sale is considered highly probable. Management must be committed to the sale, which is expected to occur within one year from the date of classification as held for sale. Upon classification as held for sale, the carrying amount of the disposal group (or group of assets) is compared to their fair value less cost to sell. If the fair value less cost to sell is lower than the carrying value, this expected loss is recognized through a reduction of the carrying value of any goodwill related to the disposal group or the carrying value of certain other non-current, non-financial assets to the extent that the carrying value of those assets exceeds their fair value. Any excess of the expected loss over the reduction of the carrying amount of these relevant assets is not recognized upon classification as held for sale, but is recognized as part of the result on disposal if and when a divestment transaction occurs. Classification into or out of held for sale does not result in restating comparative amounts in the statement of financial position.
Foreign exchange translation	2.3 Foreign exchange translation a. Translation of foreign currency transactions The Group’s consolidated financial statements are presented in euros. Items included in the financial statements of individual group companies are recorded in their respective functional currency which is the currency of the primary economic environment in which each entity operates. Transactions in foreign currencies are initially recorded at the exchange rate prevailing at the date of the transaction. At the reporting date, monetary assets and monetary liabilities in foreign currencies are translated to the functional currency at the closing rate of exchange prevailing on that date, except for own equity instruments in foreign currencies which are translated using historical exchange rates. Non-monetary items carried at cost are translated using the exchange rate at the date of the transaction, while assets carried at fair value are translated at the exchange rate when the fair value was determined. Exchange differences on monetary items are recognized in the income statement when they arise, except when they are deferred in other comprehensive income as a result of a qualifying cash flow or net investment hedge. Exchange differences on non-monetary items carried at fair value are recognized in other comprehensive income or the income statement, consistently with other gains and losses on these items. b. Translation of foreign currency operations On consolidation, the financial statements of group entities with a foreign functional currency are translated to euro, the currency in which the consolidated financial statements are presented. Assets and liabilities are translated at the closing rates on the reporting date. Income, expenses and capital transactions (such as dividends) are translated at average exchange rates or at the prevailing rates on the transaction date, if more appropriate. Goodwill and fair value adjustments arising on the acquisition of a foreign entity are translated at the closing rates on the reporting date. The resulting exchange differences are recognized in the ‘foreign currency translation reserve’, which is part of shareholders’ equity. On disposal of a foreign entity the related cumulative exchange differences included in the reserve are recognized in the income statement.
Segment reporting	2.4 Segment reporting Reporting segments and segment measures are explained and disclosed in note 5 Segment information.
Offsetting of assets and liabilities	2.5 Offsetting of assets and liabilities Financial assets and liabilities are offset in the statement of financial position when the Group has a legally enforceable right to offset and has the intention to settle the asset and liability on a net basis or simultaneously. The legally enforceable right must not be contingent on future events and must be enforceable in the normal course of business and in the event of default, insolvency or bankruptcy of the Company or the counterpart.
Intangible assets	2.6 Intangible assets a. Goodwill Goodwill is recognized as an intangible asset for interests in subsidiaries and is measured as the positive difference between the acquisition cost and the Group’s interest in the net fair value of the entity’s identifiable assets, liabilities and contingent liabilities. Subsequently, goodwill is carried at cost less accumulated impairment charges. It is derecognized when the interest in the subsidiary is disposed. b. Value of business acquired When a portfolio of insurance contracts is acquired, whether directly from another insurance company or as part of a business combination, the difference between the fair value and the carrying amount of the insurance liabilities is recognized as value of business acquired (VOBA). The Group also recognizes VOBA when it acquires a portfolio of investment contracts with discretionary participation features. VOBA is amortized over the useful life of the acquired contracts, based on either the expected future premiums, revenues or the expected gross profit margins. The amortization period and pattern are reviewed at each reporting date; any change in estimates is recorded in the income statement. For all products, VOBA, in conjunction with deferred policy acquisition costs (DPAC) where appropriate, is assessed for recoverability using aggregation levels on a geographical jurisdiction basis or at the level of portfolio of contracts that are subject to broadly similar risks and managed together as a single portfolio. The portion determined not to be recoverable is charged to the income statement. VOBA is considered in the liability adequacy test for each reporting period, for more details refer to 2.19.f Liability adequacy testing. When unrealized gains or losses arise on available-for-sale assets backing the insurance liabilities, VOBA is adjusted to equal the effect that the realization of the gains or losses (through a sale or impairment) would have had on VOBA. The adjustment is recognized directly in shareholders’ equity. VOBA is derecognized when the related contracts are settled or disposed. c. Future servicing rights On the acquisition of a portfolio of investment contracts without discretionary participation features under which Aegon will render investment management services, the present value of future servicing rights is recognized as an intangible asset. Future servicing rights can also be recognized on the sale of a loan portfolio or the acquisition of insurance agency activities. The present value of the future servicing rights is amortized over the servicing period and is subject to impairment testing. It is derecognized when the related contracts are settled or disposed. Where applicable, Aegon recognizes other intangibles on the acquisition of a business combination such as those related to customer relationships. This can include customer contracts, distribution agreements and client portfolios. For these intangibles the present value of future cash flows are recognized and amortized in the period when future economic benefits arise from these intangibles. These intangible assets are also presented under future servicing rights. d. Software and other intangible assets Software and other intangible assets are recognized to the extent that the assets can be identified, are controlled by the Group, are expected to provide future economic benefits and can be measured reliably. The Group does not recognize internally generated intangible assets arising from research or internally generated goodwill, brands, customer lists and similar items. Software and other intangible assets are carried at cost less accumulated depreciation and impairment losses. Depreciation of the asset is over its useful life as the future economic benefits emerge and is recognized in the income statement as an expense. The depreciation period and pattern are reviewed at each reporting date, with any changes recognized in the income statement. An intangible asset is derecognized when it is disposed of or when no future economic benefits are expected from its use or disposal.
Investments	2.7 Investments General account investments comprise financial assets, excluding derivatives, as well as investments in real estate. a. Financial assets, excluding derivatives Financial assets are recognized on the trade date when the Group becomes a party to the contractual provisions of the instrument and are classified for accounting purposes depending on the characteristics of the instruments and the purpose for which they were purchased. Classification The following financial assets are measured at fair value through profit or loss: financial assets held for trading, financial assets managed on a fair value basis in accordance with the Group’s investment strategy and financial assets containing an embedded derivative that is not closely related and that cannot be reliably bifurcated. In addition, in certain instances the Group designates financial assets to this category when by doing so a potential accounting mismatch in the financial statements is eliminated or significantly reduced. Financial assets with fixed or determinable payments, that are not quoted in an active market and that the Group does not intend to sell in the near future are classified as loans. Those for which the holder may not recover substantially all of its initial investment, other than because of credit deterioration, are accounted for as available-for-sale. All remaining non-derivative financial assets are classified as available-for-sale. Measurement Financial assets are initially recognized at fair value excluding interest accrued to date plus, in the case of a financial asset not at fair value through profit or loss, any directly attributable incremental transaction costs. Loans and financial assets held-to-maturity are subsequently carried at amortized cost using the effective interest rate method. Financial assets at fair value through profit or loss are measured at fair value with all changes in fair value recognized in the income statement as incurred. Available-for-sale assets are recorded at fair value with unrealized changes in fair value recognized in other comprehensive income. Financial assets that are designated as hedged items are measured in accordance with the requirements for hedge accounting. Amortized cost The amortized cost of a debt instrument is the amount at which it is measured at initial recognition minus principal repayments, plus or minus the cumulative amortization of any difference between the initial amount and the maturity amount, and minus any reduction for impairment. The effective interest rate method is a method of calculating the amortized cost and of allocating the interest income or expense over the relevant period. The effective interest rate is the rate that exactly discounts estimated future cash payments or receipts through the expected life of the debt instrument or, when appropriate, a shorter period to the net carrying amount of the instrument. When calculating the effective interest rate, all contractual terms are considered. Possible future credit losses are not taken into account. Charges and interest paid or received between parties to the contract that are an integral part of the effective interest rate, transaction costs and all other premiums or discounts are included in the calculation. Fair value The consolidated financial statements provide information on the fair value of all financial assets, including those carried at amortized cost where the values are provided in the notes to the financial statements. Fair value is defined as the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date under current market conditions (i.e. an exit price at the measurement date from the perspective of a market participant that holds the asset or owes the liability). For quoted financial assets for which there is an active market, the fair value is the bid price at the reporting date. In the absence of an active market, fair value is estimated by using present value based or other valuation techniques. Where discounting techniques are applied, the discount rate is based on current market rates applicable to financial instruments with similar characteristics. The valuation techniques that include unobservable inputs can result in a different outcome than the actual transaction price at which the asset was acquired. Such differences are not recognized in the income statement immediately but are deferred. They are released over time to the income statement in line with the change in factors (including time) that market participants would consider in setting a price for the asset. Interest accrued to date is not included in the fair value of the financial asset. Derecognition A financial asset is derecognized when the contractual rights to the asset’s cash flows expire and when the Group retains the right to receive cash flows from the asset or has an obligation to pay received cash flows in full without delay to a third party and either: has transferred the asset and substantially all the risks and rewards of ownership, or has neither transferred nor retained all the risks and rewards but has transferred control of the asset. Financial assets of which the Group has neither transferred nor retained significantly all the risk and rewards are recognized to the extent of the Group’s continuing involvement. If significantly all risks are retained, the assets are not derecognized. On derecognition, the difference between the disposal proceeds and the carrying amount is recognized in the income statement as a realized gain or loss. Any cumulative unrealized gain or loss previously recognized in the revaluation reserve in shareholders’ equity is also recognized in the income statement. Security lending and repurchase agreements Financial assets that are lent to a third party or that are transferred subject to a repurchase agreement at a fixed price are not derecognized as the Group retains substantially all the risks and rewards of the asset. A liability is recognized for cash (collateral) received, on which interest is accrued. A security that has been received under a borrowing or reverse repurchase agreement is not recognized as an asset. A receivable is recognized for any related cash (collateral) paid by Aegon. The difference between sale and repurchase price is treated as investment income. If the Group subsequently sells that security, a liability to repurchase the asset is recognized and initially measured at fair value. Collateral With the exception of cash collateral, assets received as collateral are not separately recognized as an asset until the financial asset they secure defaults. When cash collateral is recognized, a liability is recorded for the same amount. b. Real estate Investments in real estate include property held to earn rentals or for capital appreciation, or both. Investments in real estate are presented as ‘Investments’. Property that is occupied by the Group and that is not intended to be sold in the near future is classified as real estate held for own use and is presented in ‘Other assets and receivables’. All property is initially recognized at cost. Such cost includes the cost of replacing part of the real estate and borrowing cost for long-term construction projects if recognition criteria are met. Subsequently, investments in real estate are measured at fair value with the changes in fair value recognized in the income statement. Real estate held for own use is carried at its revalued amount, which is the fair value at the date of revaluation less subsequent accumulated depreciation and impairment losses. Depreciation is calculated on a straight line basis over the useful life of a building. Land is not depreciated. On revaluation the accumulated depreciation is eliminated against the gross carrying amount of the asset and the net amount is restated to the revalued amount. On disposal of an asset, the difference between the net proceeds received and the carrying amount is recognized in the income statement. Any remaining surplus attributable to real estate in own use in the revaluation reserve is transferred to retained earnings. Maintenance costs and other subsequent expenditure Expenditure incurred after initial recognition of the asset is capitalized to the extent that the level of future economic benefits of the asset is increased. Costs that restore or maintain the level of future economic benefits are recognized in the income statement as incurred.
Investments for account of policyholders	2.8 Investments for account of policyholders Investments held for account of policyholders consist of investments in financial assets as well as investments in real estate. Investment return on these assets is passed on to the policyholder. Also included are the assets held by consolidated investment funds that are backing liabilities towards third parties. Investments for account of policyholders are valued at fair value through profit or loss.
Derivatives	2.9 Derivatives a. Definition Derivatives are financial instruments of which the value changes in response to an underlying variable, that require little or no net initial investment and are settled at a future date. Assets and liabilities may include derivative-like terms and conditions. With the exception of features embedded in contracts held at fair value through profit or loss, embedded derivatives that are not considered closely related to the host contract are bifurcated, carried at fair value and presented as derivatives. In assessing whether a derivative-like feature is closely related to the contract in which it is embedded, the Group considers the similarity of the characteristics of the embedded derivative and the host contract. Embedded derivatives that transfer significant insurance risk are accounted for as insurance contracts. Derivatives with positive values are reported as assets and derivatives with negative values are reported as liabilities. Derivatives for which the contractual obligation can only be settled by exchanging a fixed amount of cash for a fixed amount of Aegon N.V. equity instruments are accounted for in shareholders’ equity . b. Measurement All derivatives recognized on the statement of financial position are carried at fair value. The fair value is calculated net of the interest accrued to date and is based on market prices, when available. When market prices are not available, other valuation techniques, such as option pricing or stochastic modeling, are applied. The valuation techniques incorporate all factors that market participants would consider and are based on observable market data, to the extent possible. c. Hedge accounting As part of its asset liability management, the Group enters into economic hedges to limit its risk exposure. These transactions are assessed to determine whether hedge accounting can and should be applied. To qualify for hedge accounting, the hedge relationship is designated and formally documented at inception, detailing the particular risk management objective and strategy for the hedge (which includes the item and risk that is being hedged), the derivative that is being used and how hedge effectiveness is being assessed. A derivative has to be highly effective in accomplishing the objective of offsetting either changes in fair value or cash flows for the risk being hedged. The effectiveness of the hedging relationship is evaluated on a prospective and retrospective basis using qualitative and quantitative measures of correlation. Qualitative methods may include comparison of critical terms of the derivative to the hedged item. Quantitative methods include a comparison of the changes in the fair value or discounted cash flow of the hedging instrument to the hedged item. A hedging relationship is considered highly effective if the results of the hedging instrument are within a ratio of 80% to 125% of the results of the hedged item. For hedge accounting purposes, a distinction is made between fair value hedges, cash flow hedges and hedges of a net investment in a foreign operation. Fair value hedges Changes in the fair value of derivatives that are designated and qualify as fair value hedges are recognized in the profit and loss account, together with fair value adjustments to the hedged item attributable to the hedged risk. If the hedge relationship no longer meets the criteria for hedge accounting, the cumulative adjustment of the hedged item is, in the case of interest bearing instruments, amortized through the profit and loss account over the remaining term of the original hedge or recognized directly when the hedged item is derecognized. Cash flow hedges Cash flow hedges are hedges of the exposure to variability in cash flows that is attributable to a particular risk of a forecasted transaction or a recognized asset or liability and could affect profit or loss. To the extent that the hedge is effective, the change in the fair value of the derivative is recognized in the related revaluation reserve in shareholders’ equity. Any ineffectiveness is recognized directly in the income statement. The amount recorded in shareholders’ equity is released to the income statement to coincide with the hedged transaction, except when the hedged transaction is an acquisition of a non-financial asset or liability. In this case, the amount in shareholders’ equity is included in the initial cost of the asset or liability. Net investment hedges Net investment hedges are hedges of currency exposures on a net investment in a foreign operation. To the extent that the hedge is effective, the change in the fair value of the hedging instrument is recognized in the net foreign investment hedging reserve in shareholders’ equity. Any ineffectiveness is recognized in the income statement. The amount in shareholders’ equity is released to the income statement when the foreign operation is disposed of. Hedge accounting is discontinued prospectively for hedges that are no longer considered effective. When hedge accounting is discontinued for a fair value hedge, the derivative continues to be carried on the statement of financial position with changes in its fair value recognized in the income statement. When hedge accounting is discontinued for a cash flow hedge because the cash flow is no longer expected to occur, the accumulated gain or loss in shareholders’ equity is recognized immediately in the income statement. In other situations where hedge accounting is discontinued for a cash flow hedge, including those where the derivative is sold, terminated or exercised, accumulated gains or losses in shareholders’ equity are amortized into the income statement when the income statement is impacted by the variability of the cash flow from the hedged item.
Investments in joint arrangements	2.10 Investments in joint arrangements In general, joint arrangements are contractual agreements whereby the Group undertakes, with other parties, an economic activity that is subject to joint control. Joint control exists when it is contractually agreed to share control over an economic activity. Joint control exists only when decisions about the relevant activities require the unanimous consent of the parties sharing control. Investments in joint arrangements are classified as either joint operations or joint ventures depending on the contractual rights and obligations each investor has rather than the legal structure of the joint arrangement. Aegon has assessed the nature of its joint arrangements and determined them to be joint ventures. Joint ventures are accounted for using the equity method. Under the equity method of accounting, interests in joint ventures are initially recognized at cost, which includes positive goodwill arising on acquisition. Negative goodwill is recognized in the income statement on the acquisition date. If joint ventures are obtained in successive share purchases, each significant transaction is accounted for separately. The carrying amount is subsequently adjusted to reflect the change in the Group’s share in the net assets of the joint venture and is subject to impairment testing. The net assets are determined based on the Group’s accounting policies. Any gains and losses recorded in other comprehensive income by the joint venture are reflected in other reserves in shareholders’ equity, while the share in the joint ventures net income is recognized as a separate line item in the consolidated income statement. The Group’s share in losses is recognized until the investment in the joint ventures’ equity and any other long-term interest that are part of the net investment are reduced to nil, unless guarantees exist. Gains and losses on transactions between the Group and the joint ventures are eliminated to the extent of the Group’s interest in the entity, with the exception of losses that are evidence of impairment which are recognized immediately. Own equity instruments of Aegon N.V. that are held by the joint venture are not eliminated. On disposal of an interest in a joint venture, the difference between the net proceeds and the carrying amount is recognized in the income statement and gains and losses previously recorded directly in the revaluation reserve are reversed and recorded through the income statement.
Investments in associates	2.11 Investments in associates Entities over which the Group has significant influence through power to participate in financial and operating policy decisions, but which do not meet the definition of a subsidiary, are accounted for using the equity method. Interests held by venture capital entities, mutual funds and investment funds that qualify as an associate are accounted for as an investment held at fair value through profit or loss. Interests held by the Group in venture capital entities, mutual funds and investment funds that are managed on a fair value basis, are also accounted for as investments held at fair value through profit or loss. Interests in associates are initially recognized at cost, which includes positive goodwill arising on acquisition. Negative goodwill is recognized in the income statement on the acquisition date. If associates are obtained in successive share purchases, each significant transaction is accounted for separately. The carrying amount is subsequently adjusted to reflect the change in the Group’s share in the net assets of the associate and is subject to impairment testing. The net assets are determined based on the Group’s accounting policies. Any gains and losses recorded in other comprehensive income by the associate are reflected in other reserves in shareholders’ equity, while the share in the associate’s net income is recognized as a separate line item in the consolidated income statement. The Group’s share in losses is recognized until the investment in the associate’s equity and any other long-term interest that are part of the net investment are reduced to nil, unless guarantees exist. Gains and losses on transactions between the Group and the associate are eliminated to the extent of the Group’s interest in the entity, with the exception of losses that are evidence of impairment which are recognized immediately. Own equity instruments of Aegon N.V. that are held by the associate are not eliminated. On disposal of an interest in an associate, the difference between the net proceeds and the carrying amount is recognized in the income statement and gains and losses previously recorded directly in the revaluation reserve are reversed and recorded through the income statement.
Reinsurance assets	2.12 Reinsurance assets Reinsurance contracts are contracts entered into by the Group in order to receive compensation for claims/benefits incurred on contracts written by the Group (outgoing reinsurance). Reinsurance assets are also held as part of exiting the business. For contracts transferring sufficient insurance risk, a reinsurance asset is recognized for the expected future benefits, less expected future reinsurance premiums. Reinsurance contracts with insufficient insurance risk transfer are accounted for as investment or service contracts, depending on the nature of the agreement. Reinsurance assets are measured consistently with the assumptions associated with the underlying insurance contracts and in accordance with the terms of each reinsurance contract. They are subject to impairment testing and are derecognized when the contractual rights are extinguished or expire or when the contract is transferred to another party. Aegon is not relieved of its legal liabilities when entering into reinsurance transactions, therefore the reserves relating to the underlying insurance contracts will continue to be reported on the consolidated statement of financial position during the contractual term of the underlying contracts. Reinsurance premiums, commissions and claim settlements are accounted for in the same way as the original contracts for which the reinsurance was concluded. The insurance premiums for the original contracts are presented gross of reinsurance premiums paid.
Deferred expenses	2.13 Deferred expenses a. Deferred policy acquisition costs (DPAC) DPAC relates to all insurance contracts as well as investment contracts with discretionary participation features and represents directly attributable costs that are related to the selling, underwriting and initiating of these insurance contracts. DPAC are deferred to the extent that they are recoverable and are subsequently amortized based on factors such as expected gross profit margins. For products sold in the United States with amortization based on expected gross profit margins or revenues, the amortization period and pattern are reviewed at each reporting date and any change in estimates is recognized in the income statement. Estimates include, but are not limited to: an economic perspective in terms of future returns on bond and equity instruments, mortality, morbidity and lapse assumptions, maintenance expenses and expected inflation rates. For all products, DPAC, in conjunction with VOBA where appropriate, is assessed for recoverability at least annually on a country-by-country basis as part of the liability adequacy test for each reporting period. If appropriate, the assumptions included in the determination of estimated gross profits or revenues are adjusted. The portion of DPAC that is determined not to be recoverable is charged to the income statement. For products sold in the United States, when unrealized gains or losses arise on available-for-sale assets backing the insurance liabilities, DPAC is adjusted to equal the effect that the realization of the gains or losses (through sale or impairment) would have had on its measurement. This is recognized directly in the related revaluation reserve in shareholders’ equity. DPAC is derecognized when the related contracts are settled or disposed. b. Deferred cost of reinsurance A deferred cost of reinsurance is established when Aegon enters into a reinsurance transaction, except for reinsurance transactions that are entered into as part of a plan to exit a business. When Aegon enters into a reinsurance contract as part of a plan to exit a business, an immediate loss is recognized in the income statement. Upon reinsurance, Aegon is not relieved of its legal liabilities, so the reserves relating to the underlying reinsured contracts will continue to be reported in the consolidated statement of financial position during the contractual term of the underlying contracts. The difference, if any, between amounts paid in a reinsurance transaction and the amount of the liabilities relating to the underlying reinsured contracts is part of the deferred cost of reinsurance. When losses on buying reinsurance are deferred, the amortization is based on the assumptions of the underlying insurance contracts. The amortization is recognized in the income statement. c. Deferred transaction costs Deferred transaction costs relate to investment contracts without discretionary participation features under which Aegon will render investment management services. Incremental costs that are directly attributable to securing these investment management contracts are recognized as an asset if they can be identified separately and measured reliably and if it is probable that they will be recovered. For contracts involving both the origination of a financial liability and the provision of investment management services, only the transaction costs allocated to the servicing component are deferred. The other transaction costs are included in the carrying amount of the financial liability. The deferred transaction costs are amortized in line with fee income, unless there is evidence that another method better represents the provision of services under the contract. The amortization is recognized in the income statement. Deferred transaction costs are subject to impairment testing at least annually. Deferred transaction costs are derecognized when the related contracts are settled or disposed.
Other assets and receivables	2.14 Other assets and receivables Other assets include trade and other receivables, prepaid expenses, equipment and real estate held for own use. Trade and other receivables are initially recognized at fair value and are subsequently measured at amortized cost. Equipment is initially carried at cost, depreciated on a straight line basis over its useful life to its residual value and is subject to impairment testing. The accounting for real estate held for own use is described in note 2.7 Investments.
Cash and cash equivalents	2.15 Cash and cash equivalents Cash comprises cash at banks and in-hand. Cash equivalents are short-term, highly liquid investments generally with original maturities of three months or less that are readily convertible to known cash amounts, are subject to insignificant risks of changes in value and are held for the purpose of meeting short-term cash requirements. Money market investments that are held for investment purposes (backing insurance liabilities, investment liabilities or equity based on asset liability management considerations) are not included in cash and cash equivalents but are presented as investments or investments for account of policyholders.
Impairment of assets	2.16 Impairment of assets An asset is impaired if the carrying amount exceeds the amount that would be recovered through its use or sale. For tangible and intangible assets, financial assets and reinsurance assets, if not held at fair value through profit or loss, the recoverable amount of the asset is estimated when there are indications that the asset may be impaired. Irrespective of the indications, goodwill and other intangible assets with an indefinite useful life that are not amortized, are tested at least annually. There are a number of significant risks and uncertainties inherent in the process of monitoring investments and determining if impairment exists. These risks and uncertainties include the risk that the Group’s assessment of an issuer’s ability to meet all of its contractual obligations will change based on changes in the credit characteristics of that issuer and the risk that the economic outlook will be worse than expected or have more of an impact on the issuer than anticipated. Any of these situations could result in a charge against the income statement to the extent of the impairment charge recorded. a. Impairment of non-financial assets Assets are tested individually for impairment when there are indications that the asset may be impaired. For goodwill and intangible assets with an undefined life, an impairment test is performed at least once a year or more frequently as a result of an event or change in circumstances that would indicate an impairment charge may be necessary. The impairment loss is calculated as the difference between the carrying and the recoverable amount of the asset, which is the higher of an asset’s value in use and its fair value less cost of disposal. The value in use represents the discounted future net cash flows from the continuing use and ultimate disposal of the asset and reflects its known inherent risks and uncertainties. The valuation utilizes the best available information, including assumptions and projections considered reasonable and supportable by management. The assumptions used in the valuation involve significant judgments and estimates. Refer to note 31 Intangible assets for more details. Impairment losses are charged to shareholders’ equity to the extent that they offset a previously recorded revaluation reserve relating to the same item. Any further losses are recognized directly in the income statement. Impairment of deferred policy acquisition costs is included in note 15 Impairment charges/(reversals). With the exception of goodwill, impairment losses are reversed when there is evidence that there has been a change in the estimates used to determine the asset’s recoverable amount since the recognition of the last impairment loss. The reversal is recognized in the income statement to the extent that it reverses impairment losses previously recognized in the income statement. The carrying amount after reversal cannot exceed the amount that would have been recognized had no impairment taken place. Non-financial assets that only generate cash flows in combination with other assets and liabilities are tested for impairment at the level of the cash-generating unit. The goodwill acquired in a business combination, for the purpose of impairment testing, is allocated to cash-generating units, or groups of cash-generating units, that are expected to benefit from the synergies of the combination. The allocation is based on the level at which goodwill is monitored internally and cannot be larger than an operating segment. When impairing a cash-generating unit, any goodwill allocated to the unit is first written-off and recognized in the income statement. The remaining impairment loss is allocated on a pro rata basis among the other assets, on condition that the resulting carrying amounts do not fall below the individual assets’ recoverable amounts. b. Impairment of debt instruments Debt instruments are impaired if there is objective evidence that a credit event has occurred after the initial recognition of the asset that has a negative impact on the estimated future cash flows. Individually significant loans and other receivables are first assessed separately. All non-impaired assets measured at amortized cost are then grouped by credit risk characteristics and collectively tested for impairment. For debt instruments carried at amortized cost, the carrying amount of impaired financial assets is reduced through an allowance account. The impairment loss is calculated as the difference between the carrying and recoverable amount of the investment. The recoverable amount is determined by discounting the estimated probable future cash flows at the original effective interest rate of the asset. For variable interest debt instruments, the current effective interest rate under the contract is applied. For debt instruments classified as available-for-sale, the asset is impaired to its fair value. Any unrealized loss previously recognized in other comprehensive income is taken to the income statement in the impairment loss. After impairment the interest accretion on debt instruments that are classified as available-for-sale is recognized using the rate of interest used to discount the future cash flows for the purpose of measuring the impairment loss. Impairment losses recognized for debt instruments can be reversed if in subsequent periods the amount of the impairment loss decreases and that decrease can be objectively related to a credit event occurring after the impairment was recognized. For debt instruments carried at amortized cost, the carrying amount after reversal cannot exceed what the amortized cost would have been at the reversal date, had the impairment not been recognized. c. Impairment of equity instruments For equity instruments, objective evidence of impairment of an investment in an equity instrument classified as available-for-sale includes information about significant changes with an adverse effect that have taken place in the technological, market, economic or legal environment in which the issuer operates, and indicates that the cost of the investment in the equity instrument may not be recovered. A significant or prolonged decline in fair value below initial cost is also considered objective evidence of impairment and always results in a loss being recognized in the income statement. Significant or prolonged decline is defined as an unrealized loss position for generally more than six months or a fair value of less than 80% of the cost price of the investment. Equity investments are impaired to the asset’s fair value and any unrealized gain or loss previously recognized in shareholders’ equity is taken to the income statement as an impairment loss. The amount exceeding the balance of previously recognized unrealized gains or losses is recognized in the income statement. If an available-for-sale equity security is impaired based upon Aegon’s qualitative or quantitative impairment criteria, any further declines in the fair value at subsequent reporting dates are recognized as impairments. Therefore, at each reporting period, for an equity security that is determined to be impaired based upon Aegon’s impairment criteria, an impairment is recognized for the difference between the fair value and the original cost basis, less any previously recognized impairments. Impairment losses on equity instruments cannot be reversed. d. Impairment of reinsurance assets Reinsurance assets are impaired if there is objective evidence, as a result of an event that occurred after initial recognition of the reinsurance asset, that not all amounts due under the terms of the contract may be received. In such a case, the value of the reinsurance asset recoverable is determined based on the best estimate of future cash flows, taking into consideration the reinsurer’s current and expected future financial conditions plus any collateral held in trust for Aegon’s benefit. The carrying value is reduced to this calculated recoverable value, and the impairment loss recognized in the income statement.
Equity	2.17 Equity Financial instruments that are issued by the Group are classified as equity if they represent a residual interest in the assets of the Group after deducting all of its liabilities and the Group has an unconditional right to avoid delivering cash or another financial asset to settle its contractual obligation. In addition to common shares, the Group has issued perpetual securities. Perpetual securities have no final maturity date, repayment is at the discretion of Aegon and for junior perpetual capital securities, Aegon has the option to defer coupon payments at its discretion. The perpetual capital securities are classified as equity rather than debt, are measured at par and those that are denominated in US dollars are translated into euro using historical exchange rates. Non-cumulative subordinated notes are identified as a compound instrument due to the nature of this financial instrument. For these non-cumulative subordinated notes, Aegon has an unconditional right to avoid delivering cash or another financial asset to settle the coupon payments. The redemption of the principal is however not at the discretion of Aegon and therefore Aegon has a contractual obligation to settle the redemption in cash or another financial asset or through the exchange of financial assets and liabilities at potentially unfavorable conditions for Aegon. Compound instruments are separated into liability components and equity components. The liability component for the non-cumulative subordinated notes is equal to the present value of the redemption amount and carried at amortized cost using the effective interest rate method. The unwinding of the discount of this component is recognized in the income statement. The liability component is derecognized when the Group’s obligation under the contract expires, is discharged or is cancelled. At initial recognition the equity component is assigned the residual amount after deducting the liability component from the fair value of the instrument as a whole. The equity component in US dollars is translated into euro using historical exchange rates. Incremental external costs that are directly attributable to the issuing or buying back of own equity instruments are recognized in equity, net of tax. For compound instruments incremental external costs that are directly attributable to the issuing or buying back of the compound instruments are recognized proportionate to the equity component and liability component, net of tax. Dividends and other distributions to holders of equity instruments are recognized directly in equity, net of tax. A liability for non-cumulative dividends payable is not recognized until the dividends have been declared and approved. Treasury shares are shares issued by Aegon N.V. that are held by Aegon, one of its subsidiaries or by another entity controlled by Aegon. Treasury shares are deducted from Group equity, regardless of the objective of the transaction. No gain or loss is recognized in the income statement on the purchase, sale, issue or cancellation of the instruments. If sold, the difference between the carrying amount and the proceeds is reflected in retained earnings. The consideration paid or received is recognized directly in shareholders’ equity. All treasury shares are eliminated in the calculation of earnings per share and dividend per common share.
Trust pass-through securities and (subordinated) borrowings	2.18 Trust pass-through securities and (subordinated) borrowings A financial instrument issued by the Group is classified as a liability if the contractual obligation must be settled in cash or another financial asset or through the exchange of financial assets and liabilities at potentially unfavorable conditions for the Group. Trust pass-through securities and (subordinated) borrowings are initially recognized at their fair value including directly attributable transaction costs and are subsequently carried at amortized cost using the effective interest rate method, with the exception of specific borrowings that are designated as at fair value through profit or loss to eliminate, or significantly reduce, an accounting mismatch, or specific borrowings which are carried as at fair value through profit or loss as they are managed and evaluated on a fair value basis. The liability is derecognized when the Group’s obligation under the contract expires, is discharged or is cancelled. Subordinated borrowings include the liability component of non-cumulative subordinated notes. These notes are identified as a compound instrument due to the nature of this financial instrument. Compound instruments are separated into equity components and liability components. The liability component for the non-cumulative subordinated notes is related to the redemption amount. For further information on the accounting policy of the non-cumulative subordinated notes refer to note 2.17 Equity.
Insurance contracts	2.19 Insurance contracts Insurance contracts are accounted for under IFRS 4 Insurance Contracts. In accordance with this standard, Aegon continues to apply the existing accounting policies that were applied prior to the adoption of IFRS with certain modifications allowed by IFRS 4 for standards effective subsequent to adoption. Aegon applies, in general, non-uniform accounting policies for insurance liabilities and insurance related intangible assets to the extent that it was allowed under Dutch Accounting Principles. As a result, specific methodologies applied may differ between Aegon’s operations as they may reflect local regulatory requirements and local practices for specific product features in these local markets. At the time of IFRS adoption, Aegon was applying US GAAP for its United States operations whereas in the Netherlands and the United Kingdom, Aegon was applying Dutch Accounting Principles. Since adoption of IFRS, Aegon has considered new and amended standards in those GAAPs which have become effective subsequent to the date of transition to IFRS. If any changes are made to current accounting policies for insurance contracts, these will be in accordance with IFRS 4. Insurance contracts are contracts under which the Group accepts a significant risk – other than a financial risk – from a policyholder by agreeing to compensate the beneficiary on the occurrence of an uncertain future event by which he or she will be adversely affected. Contracts that do not meet this definition are accounted for as investment contracts. The Group reviews homogeneous books of contracts to assess whether the underlying contracts transfer significant insurance risk on an individual basis. This is considered the case when at least one scenario with commercial substance can be identified in which the Group has to pay significant additional benefits to the policyholder. Contracts that have been classified as insurance are not reclassified subsequently. Insurance liabilities are recognized when the contract is entered into and the premiums are charged. The liability is derecognized when the contract expires, is discharged, disposed or cancelled. Within the United States, the Netherlands and the United Kingdom, substantially modified contracts are accounted for as an extinguishment of the original liability and the recognition of a new liability. Insurance assets and liabilities are valued in accordance with the accounting principles that were applied by the Group prior to the transition to IFRS and with consideration of standards effective subsequent to the date of transition to IFRS, as further described in the following paragraphs. In order to reflect the specific nature of the products written, subsidiaries are allowed to apply local accounting principles to the measurement of insurance contracts. All valuation methods used by the subsidiaries are based on the general principle that the carrying amount of the net liability must be sufficient to meet any reasonably foreseeable obligation resulting from the insurance contracts. a. Life insurance contracts Life insurance contracts are insurance contracts with life-contingent benefits. The measurement of the liability for life insurance contracts varies depending on the nature of the product. Liabilities arising from traditional life insurance products that are offered by Aegon, particularly those with fixed and guaranteed account terms, are typically measured using the net premium method. Under this method the liability is determined as the sum of the discounted value of the expected benefits and future administration expenses directly related to the contract, less the discounted value of the expected theoretical premiums that would be required to meet the future cash outflows based on the valuation assumptions used. The liability is either based on current assumptions or calculated using the assumptions established at the time the contract was issued, in which case a margin for risk and adverse deviation is generally included. Furthermore, the liability for life insurance comprises reserves for unearned premiums and accrued annuity benefits payable. Depending on local accounting principles, the liability may include amounts for future services on contracts where the policy administration charges are higher in the initial years than in subsequent years. Terms and conditions, including participation features, are considered when establishing the insurance liabilities. Where the Group has discretion over the amount or timing of the bonuses distributed resulting from participation features, a liability is recognized equal to the amount that is available at the reporting date for future distribution to policyholders. In establishing the liability, guaranteed minimum benefits issued to the policyholder are measured as described in note 2.19.c Embedded derivatives or, if bifurcated from the host contract, as described in note 2.9 Derivatives. b. Life insurance contracts for account of policyholders Life insurance contracts under which the policyholder bears the risks associated with the underlying investments are classified as insurance contracts for account of policyholders. The liability for the insurance contracts for account of policyholders is measured at the policyholder account balance. Contracts with unit-denominated payments are measured at current unit values, which reflect the fair values of the assets of the fund. If applicable, the liability representing the nominal value of the policyholder unit account is amortized over the term of the contract so that interest on actuarial funding is at an expected rate of return. c. Embedded derivatives Life insurance contracts may include derivative-like terms and conditions. With the exception of policyholder options to surrender the contract at a fixed amount, contractual features that are not closely related to the insurance contract and that do not themselves meet the definition of insurance contracts are accounted for as derivatives. Guaranteed minimum benefits Certain life insurance contracts, issued by the Group, contain guaranteed minimum benefits. Bifurcated guaranteed minimum benefits are classified as derivatives. In the United States, the additional liability for guaranteed minimum benefits that are not bifurcated is determined each period by estimating the expected value of benefits in excess of the projected account balance and recognizing the excess over the accumulation period based on total expected assessments. The estimates are reviewed regularly and any resulting adjustment to the additional liability is recognized in the income statement. The benefits used in calculating the liabilities are commonly based on the average benefits payable over a range of stochastic scenarios. Where applicable, the calculation of the liability incorporates a percentage of the potential annuitizations that may be elected by the contract holder. In the Netherlands, an additional liability is established for guaranteed minimum investment returns on group pension plans with profit sharing and on traditional insurance contracts, with profit sharing based on an external interest index, that are not bifurcated. These guarantees are measured at fair value. d. Shadow accounting Shadow accounting allows that all gains and losses on investments affect the measurement of the insurance assets and liabilities in the same way, regardless of whether they are realized or unrealized and regardless of whether the unrealized gains and losses are recognized in the income statement or directly in shareholders’ equity in the revaluation reserve. In some instances, realized gains or losses on investments have a direct effect on the measurement of the insurance assets and liabilities. For example, some insurance contracts include benefits that are contractually based on the investment returns realized by the insurer. In addition, realization of gains or losses on available-for-sale investments can lead to unlocking of VOBA or DPAC and can also affect the outcome of the liability adequacy test to the extent that it considers actual future investment returns. For similar changes in unrealized gains and losses, shadow accounting is applied. If an unrealized gain or loss triggers a shadow accounting adjustment to VOBA, DPAC or the insurance liabilities, the corresponding adjustment is recognized through other comprehensive income in the revaluation reserve, together with the unrealized gain or loss. Some profit sharing schemes issued by the Group entitle the policyholder to a bonus which is based on the actual total return on specific assets held. To the extent that the bonus relates to gains or losses on available-for-sale investments for which the unrealized gains or losses are recognized in the revaluation reserve in shareholders’ equity, shadow accounting is applied. This means that the increase in the liability is also charged to shareholders’ equity to offset the unrealized gains rather than to the income statement. e. Non-life insurance contracts Non-life insurance contracts are insurance contracts where the insured event is not life-contingent. For non-life products the insurance liability generally includes reserves for unearned premiums, unexpired risk, inadequate premium levels and outstanding claims and benefits. No catastrophe or equalization reserves are included in the measurement of the liability. The reserve for unearned premiums includes premiums received for risks that have not yet expired. Generally, the reserve is released over the coverage period of the premium and is recognized as premium income. The liability for outstanding claims and benefits is established for claims that have not been settled and any related cash flows, such as claims handling costs. It includes claims that have been incurred but have not been reported to the Group. The liability is calculated at the reporting date using statistical methods based on empirical data and current assumptions that may include a margin for adverse deviation. Liabilities for claims subject to periodic payment are calculated using actuarial methods consistent with those applied to life insurance contracts. Discounting is applied if allowed by the local accounting principles used to measure the insurance liabilities. Discounting of liabilities is generally applied when there is a high level of certainty concerning the amount and settlement term of the cash outflows. f. Liability adequacy testing At each reporting date, the adequacy of the life insurance liabilities (including life insurance contracts for account of policyholders), net of VOBA and DPAC, is assessed using a liability adequacy test. All tests performed within the Group are based on current estimates of all contractual future cash flows, including related cash flows from policyholder options and guarantees. A number of valuation methods are applied, including discounted cash flow methods, option pricing models and stochastic modeling. Aggregation levels are set either on geographical jurisdiction or at the level of portfolio of contracts that are subject to broadly similar risks and managed together as a single portfolio. Specifically, in the Netherlands the liability adequacy test is performed on a consolidated basis for all life and non-life business, whereas in the Americas and the UK it is performed at the level of the portfolio of contracts. To the extent that the tests involve discounting of future cash flows, the interest rate applied is based on market rates or is based on management’s expectation of the future return on investments. These future returns on investments take into account management’s best estimate related to the actual investments and, where applicable, reinvestments of these investments at maturity. Aegon the Netherlands, as required locally, adjusts the outcome of the liability adequacy test for the difference between the fair value and the book value of the assets that are measured at amortized cost in the statement of financial position. To the extent that the account balances are insufficient to meet future benefits and expenses, any resulting deficiency is recognized in the income statement, initially by impairing the DPAC and VOBA and subsequently by establishing an insurance liability for the remaining loss, unless shadow loss recognition has taken place. In the Netherlands, in situations where market interest rates for the valuation of debt securities leads to a change in the revaluation reserve, and where the result of using the same assumptions for the liabilities could lead to a deficiency in the liability adequacy test that should be recognized in the income statement, shadow loss recognition is applied. Shadow loss recognition is applied to the extent that the deficiency of the insurance liabilities relates to the revaluation of debt securities as a result of movements in interest rates, the addition to the insurance liabilities is then offset against the revaluation reserve. If in subsequent periods such a deficiency of the insurance liability is no longer applicable, shadow loss recognition is reversed via the revaluation reserve. The adequacy of the non-life insurance liability is tested at each reporting date. Changes in expected claims that have occurred, but that have not been settled, are reflected by adjusting the liability for claims and future benefits. The reserve for unexpired risk is increased to the extent that the future claims and expenses in respect of current insurance contracts exceed the future premiums plus the current unearned premium reserve.
Investment contracts	2.20 Investment contracts Aegon conducts its operations through the following reporting segments: Contracts issued by the Group that do not transfer significant insurance risk, but do transfer financial risk from the policyholder to the Group are accounted for as investment contracts. Depending on whether the Group or the policyholder runs the risks associated with the investments allocated to the contract, the liabilities are classified as investment contracts or as investment contracts for account of policyholders. Investment contract liabilities are recognized when the contract is entered into and are derecognized when the contract expires, is discharged, cancelled or substantially modified. a. Investment contracts with discretionary participation features Some investment contracts have participation features whereby the policyholder has the right to receive potentially significant additional benefits which are based on the performance of a specified pool of investment contracts, specific investments held by the Group or on the issuer’s net income. If the Group has discretion over the amount or timing of the distribution of the returns to policyholders, the investment contract liability is measured based on the accounting principles that apply to insurance contracts with similar features. Some unitized investment contracts provide policyholders with the option to switch between funds with and without discretionary participation features. The entire contract is accounted for as an investment contract with discretionary participation features if there is evidence of actual switching resulting in discretionary participation benefits that are a significant part of the total contractual benefits. b. Investment contracts without discretionary participation features At inception, investment contracts without discretionary features are carried at amortized cost. Investment contracts without discretionary participation features are carried at amortized cost based on the expected cash flows and using the effective interest rate method. The expected future cash flows are re-estimated at each reporting date and the carrying amount of the financial liability is recalculated as the present value of estimated future cash flows using the financial liability’s original effective interest rate. Any adjustment is immediately recognized in the income statement. For these investment contracts deposit accounting is applied, meaning that deposits are not reflected as premium income, but are recognized as part of the financial liability. The consolidated financial statements provide information on the fair value of all financial liabilities, including those carried at amortized cost. As these contracts are not quoted in active markets, their value is determined by using valuation techniques, such as discounted cash flow methods and stochastic modeling. For investment contracts without discretionary participation features that can be cancelled by the policyholder, the fair value cannot be less than the surrender value. c. Investment contracts for account of policyholders Investment contracts for account of policyholders are investment contracts for which the actual return on investments allocated to the contract is passed on to the policyholder. Also included are participations held by third parties in consolidated investment funds that meet the definition of a financial liability. Investment contracts for account of policyholders are designated at fair value through profit or loss. Contracts with unit-denominated payments are measured at current unit values, which reflect the fair values of the assets of the fund. These segments are based on the business as presented in internal reports that are regularly reviewed by the Executive Board which is regarded as the chief operating decision maker. For unit-linked contracts without discretionary participation features and subject to actuarial funding, the Group recognizes a liability at the funded amount of the units. The difference between the gross value of the units and the funded value is treated as an initial fee paid by the policyholder for future asset management services and recognized as a deferred revenue liability, refer to note 2.23 Deferred gains.
Provisions	2.21 Provisions A provision is recognized for present legal or constructive obligations arising from past events, when it is probable that it will result in an outflow of economic benefits and the amount can be reliably estimated. Management exercises judgment in evaluating the probability that a loss will be incurred. The amount recognized as a provision is the best estimate of the expenditure required to settle the present obligation at the reporting date, considering all its inherent risks and uncertainties, as well as the time value of money. The estimate of the amount of a loss requires management judgment in the selection of a proper calculation model and the specific assumptions related to the particular exposure. The unwinding of the effect of discounting is recorded in the income statement as an interest expense. Onerous contracts With the exception of insurance contracts and investment contracts with discretionary participation features for which potential future losses are already considered in establishing the liability, a provision is recognized for onerous contracts in which the unavoidable costs of meeting the resulting obligations exceed the expected future economic benefits. The unavoidable costs under a contract reflect the least net cost of exiting from the contract, which is the lower of the cost of fulfilling it and any compensation or penalties arising from failure to fulfill it.
Assets and liabilities relating to employee benefits	2.22 Assets and liabilities relating to employee benefits a. Short-term employee benefits A liability is recognized for the undiscounted amount of short-term employee benefits expected to be settled within one year after the end of the period in which the service was rendered. Accumulating short-term absences are recognized over the period in which the service is provided. Benefits that are not service-related are recognized when the event that gives rise to the obligation occurs. b. Post-employment benefits The Group has issued defined contribution plans and defined benefit plans. A plan is classified as a defined contribution plan when the Group has no further obligation than the payment of a fixed contribution. All other plans are classified as defined benefit plans. Defined contribution plans The contribution payable to a defined contribution plan for services provided is recognized as an expense in the income statement. An asset is recognized to the extent that the contribution paid exceeds the amount due for services provided. Defined benefit plans Measurement The defined benefit obligation is based on the terms and conditions of the plan applicable on the reporting date. In measuring the defined benefit obligation the Group uses the projected unit credit method and actuarial assumptions that represent the best estimate of future variables. The benefits are discounted using an interest rate based on the market yield for high-quality corporate bonds that are denominated in the currency in which the benefits will be paid and that have terms to maturity that approximate the terms of the related pension liability. Actuarial assumptions used in the measurement of the liability include the discount rate, estimated future salary increases, mortality rates and price inflation. To the extent that actual experience deviates from these assumptions, the valuation of defined benefit plans and the level of pension expenses recognized in the future may be affected. Plan improvements (either vested or unvested) are recognized in the income statement at the date when the plan improvement occurs. Plan assets are qualifying insurance policies and assets held by long-term employee benefit funds that can only be used to pay the employee benefits under the plan and are not available to the Group’s creditors. They are measured at fair value and are deducted from the defined benefit obligation in determining the amount recognized on the statement of financial position. Profit or loss recognition The cost of the defined benefit plans are determined at the beginning of the year and comprise the following components: ◆ Current year service cost which is recognized in profit or loss; and ◆ Net interest on the net defined benefit liability (asset) which is recognized in profit or loss. Remeasurements of the net defined benefit liability (asset) which is recognized in other comprehensive income are revisited quarterly and shall not be reclassified to profit or loss in a subsequent period. Deducted from current year service cost are discretionary employee contributions and employee contributions that are linked to service (those which are independent of the number of years of service). Net interest on the net defined benefit liability (asset) shall be determined by multiplying the net defined benefit liability (asset) by the applicable discount rate. Net interest on the net defined benefit liability (asset) comprises interest income on plan assets and interest cost on the defined benefit obligation. Whereby interest income on plan assets is a component of the return on plan assets and is determined by multiplying the fair value of the plan assets by the applicable discount rate. The difference between the interest income on plan assets and the actual return on plan assets is included in the remeasurement of the net defined benefit liability (asset). Remeasurements of the net defined benefit liability (asset) comprise of: ◆ Actuarial gains and losses; ◆ The return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and ◆ Any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). Past service cost and gains or losses on settlements Past service cost is the change in the present value of the defined benefit obligation for employee service, resulting from a plan amendment or curtailment. Gains or losses on curtailments or settlements of a defined benefit plan comprise of the difference between: ◆ The present value of the defined benefit obligation being settled, as determined on the date of settlement; and ◆ The settlement price, including any plan assets transferred and any payments made directly by Aegon in connection with the settlement. Aegon recognizes (in the income statement) gains or losses on the curtailment or settlement of a defined benefit plan when the curtailment or settlement occurs. c. Share-based payments The Group has issued share-based plans that entitle employees to receive equity instruments issued by the Group or cash payments based on the price of Aegon N.V. common shares. Some plans provide employees of the Group with the choice of settlement. For long-term share-based plans where employees are granted the conditional right to receive Aegon shares if certain performance indicators are met and depending on continued employment of the individual employee, expenses recognized are based on the fair value on the grant date of the shares. The fair value is measured at the market price of the entities shares, adjusted to take into account the terms and conditions upon which the shares were granted. For example, where the employee is not entitled to receive dividends during the vesting period, this factor is taken into account when estimating the fair value of the shares granted. For the determination of factors such as expected dividends, market observable data has been considered. The cost for long term incentive plans are recognized in the income statement, together with a corresponding increase in shareholders’ equity, as the services are rendered. During this period the cumulative expense recognized at the reporting date reflects management’s best estimate of the number of shares expected to vest ultimately. For cash settled components (such as net settled component of long-term share-based plans) a liability will be recognized using the fair value of the equity settled award based on the elapsed portion of the vesting period. For modifications of the terms and conditions of equity-settled plans that result in those plans to be classified as cash-settled plans, the liability is recognized using the fair value measured at the modification date. The liability is remeasured at each reporting date and at the date of settlement, with any changes in fair value recognized in the income statement.
Deferred gains	2.23 Deferred gains Initial fees and front-end loadings paid by policyholders and other clients for future investment management services related to investment contracts without discretionary participation features are deferred and recognized as revenue when the related services are rendered.
Tax assets and liabilities	2.24 Tax assets and liabilities a. Current tax receivables and payables Tax receivables and payables for current and prior periods are measured at the amount that is expected to be received from or paid to the taxation authorities and that reflects uncertainty to income taxes, if any. Measurement is done using the tax rates that have been enacted or substantively enacted by the reporting date. b. Deferred tax assets and liabilities Deferred tax assets and liabilities are recognized for the estimated future tax effects of temporary differences between the carrying value of an item and its tax value, with the exception of differences arising from the initial recognition of goodwill and of assets and liabilities that do not impact taxable or accounting profits. A tax asset is recognized for tax loss carryforwards to the extent that it is probable at the reporting date that future taxable profits will be available against which the unused tax losses and unused tax credits can be utilized. Deferred tax liabilities relating to investments in subsidiaries, associates and joint ventures are not recognized if the Group is able to control the timing of the reversal of the temporary difference and it is probable that the difference will not be reversed in the foreseeable future. Deferred tax assets and liabilities are reviewed at each reporting period and are measured at tax rates that are expected to apply when the asset is realized or the liability is settled. Since there is no absolute assurance that these assets will ultimately be realized, management reviews Aegon’s deferred tax positions at each reporting period to determine if it is probable that the assets will be realized. These reviews include, among other things, the nature and amount of the taxable income and deductible expenses, the expected timing when certain assets will be used or liabilities will be required to be reported and the reliability of historical profitability of businesses expected to provide future earnings. Furthermore, management considers tax-planning opportunities it can utilize to increase the likelihood that the tax assets will be realized. The carrying amount is not discounted and reflects the Group’s expectations concerning the manner of recovery or settlement. Deferred tax assets and liabilities are recognized in relation to the underlying transaction either in profit and loss, other comprehensive income or directly in equity.
Contingent assets and liabilities	2.25 Contingent assets and liabilities Contingent assets are disclosed in the notes if the inflow of economic benefits is probable, but not virtually certain. When the inflow of economic benefits becomes virtually certain, the asset is no longer contingent and its recognition is appropriate. A provision is recognized for present legal or constructive obligations arising from past events, when it is probable that it will result in an outflow of economic benefits and the amount can be reliably estimated. If the outflow of economic benefits is not probable, a contingent liability is disclosed, unless the possibility of an outflow of economic benefits is remote.
Premium income	2.26 Premium income Gross premiums, including recurring and single premiums, from life and non-life insurance and investment contracts with discretionary participation features are recognized as revenue when they become receivable. For products where deposit accounting is required, the deposits are not reflected as premium income, but are recognized as part of the financial liability. For these products the surrender charges and charges assessed have been included in gross premiums. Premium loadings for installment payments and additional payments by the policyholder towards costs borne by the insurer are included in the gross premiums. Rebates that form part of the premium rate, such as no-claim rebates, are deducted from the gross premium, others are recognized as an expense. Depending on the applicable local accounting principles, bonuses that are used to increase the insured benefits may be recognized as gross premiums. The insurance premiums for the original contracts are presented gross of reinsurance premiums paid.
Investment income	2.27 Investment income For interest-bearing assets, interest is recognized as it accrues and is calculated using the effective interest rate method. Fees and commissions that are an integral part of the effective yield of the financial assets or liabilities are recognized as an adjustment to the effective interest rate of the instrument. Investment income includes the interest income and dividend income on financial assets carried at fair value through profit or loss. Investment income also includes rental income due.
Fee and commission income	2.28 Fee and commission income Fees and commissions from investment management services and mutual funds, services where Aegon acts as service provider (including mortgage loan fee business) and from sales activities are recognized as revenue over the period in which the services are performed or for sales activities where services have been rendered.
Policyholder claims and benefits	2.29 Policyholder claims and benefits Policyholder claims and benefits consist of claims and benefits paid to policyholders, including benefits in excess of account value for products for which deposit accounting is applied and the change in the valuation of liabilities for insurance and investment contracts. It includes internal and external claims handling costs that are directly related to the processing and settlement of claims. Amounts receivable in respect of salvage and subrogation are also considered.
Results from financial transactions	2.30 Results from financial transactions Results from financial transactions include: Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives include fair value changes of financial assets carried at fair value through profit or loss. The net gains and losses do not include interest or dividend income. Realized gains and losses on financial investments Gains and losses on financial investments include realized gains and losses on general account financial assets, other than those classified as at fair value through profit or loss. Net fair value change of derivatives All changes in fair value are recognized in the income statement, unless the derivative has been designated as a hedging instrument in a cash flow hedge or a hedge of a net investment in a foreign operation. Fair value movements of fair value hedge instruments are offset by the fair value movements of the hedged item, and the resulting hedge ineffectiveness, if any, is included in this line. In addition, the fair value movements of bifurcated embedded derivatives are included in this line. Net fair value change on for account of policyholder financial assets at fair value through profit or loss Net fair value change on for account of policyholder financial assets at fair value through profit or loss includes fair value movements of investments held for account of policyholders (refer to note 2.8 Investments for account of policyholders). The net fair value change does not include interest or dividend income. Other In addition, results from financial transactions include gains/losses on real estate (general account and account of policyholders), net foreign currency gains/(losses) and net fair value change on borrowings and other financial liabilities and realized gains on repurchased debt.
Impairment charges/(reversals)	2.31 Impairment charges/(reversals) Impairment charges and reversals include impairments and reversals on investments in financial assets, impairments and reversals on the valuation of insurance assets and other non-financial assets and receivables. Impairment of deferred policy acquisition costs is included in note 15 Impairment charges/ (reversals). Refer to note 15 Impairment charges/(reversals).
Interest charges and related fees	2.32 Interest charges and related fees Interest charges and related fees includes interest expense on trust pass-through securities and other borrowings. Interest expense on trust pass-through securities and other borrowings carried at amortized cost is recognized in profit or loss using the effective interest method.
Leases	2.33 Leases Arrangements that do not take the form of a lease but convey a right to use an asset in return for a payment are assessed at inception to determine whether they are, or contain, a lease. This involves an assessment of whether fulfillment of the arrangement is dependent on the use of a specific asset and whether the purchaser (lessee) has the right to control the use of the underlying asset. Leases that do not transfer substantially all the risks and rewards of ownership are classified as operating leases. Payments made under operating leases, where the Group is the lessee, are charged to the income statement on a straight line basis over the period of the lease. Where the Group is the lessor under an operating lease, the assets subject to the operating lease arrangement are presented in the statement of financial position according to the nature of the asset. Income from these leases are recognized in the income statement on a straight line basis over the lease term, unless another systematic basis is more representative of the time pattern in which use benefit derived from the leased asset is diminished.
Events after the reporting period	2.34 Events after the reporting period The financial statements are adjusted to reflect events that occurred between the reporting date and the date when the financial statements are authorized for issue, provided they give evidence of conditions that existed at the reporting date. Events that are indicative of conditions that arose after the reporting date are disclosed, but do not result in an adjustment of the financial statements themselves.

Summary of significant accoun78

Summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Reconciliation Between IFRS and IFRS-EU	A reconciliation between IFRS and IFRS-EU is included in the table below. Shareholders’ equity Net income 2017 2016 2015 2017 2016 2015 In accordance with IFRS 20,288 20,520 22,441 2,469 438 (431 ) Adjustment of EU ‘IAS 39’ carve-out 368 510 315 (142 ) 195 (120 ) Tax effect of the adjustment (83 ) (117 ) (71 ) 34 (47 ) 27 Effect of the adjustment after tax 285 393 244 (108 ) 149 (92 ) In accordance with IFRS-EU 20,573 20,913 22,684 2,361 586 ` (523 )

Financial risks (Tables)

Financial risks (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Information on Three Year Historical Net Income (Loss) and Shareholders' Equity	Information on Aegon’s three year historical net income/(loss) and shareholders’ equity in functional currency are shown in the table below: 2017 2016 2015 Net income Americas (in USD) 1,762 618 (261 ) The Netherlands (in EUR) 818 418 753 United Kingdom (in GBP) 71 (346 ) (674 ) Central & Eastern Europe (in EUR) 57 19 24 Spain & Portugal (in EUR) (2 ) (2 ) 22 Asia (in USD) 6 (14 ) (33 ) Asset Management (in EUR) 48 97 121 Equity in functional currency Americas (in USD) 17,712 17,103 17,609 The Netherlands (in EUR) 6,558 5,101 5,263 United Kingdom (in GBP) 1,905 1,845 2,981 Central & Eastern Europe (in EUR) 402 378 396 Spain & Portugal (in EUR) 433 451 464 Asia (in USD) 1,169 1,281 674 Asset Management (in EUR) 397 422 444
Summary of Exchange Rates of US Dollar and UK Pound per Euro	The exchange rates for US dollar and UK pound per euro for each of the last five year ends are set forth in the table below: Closing rates 2017 2016 2015 2014 2013 USD 1.20 1.05 1.09 1.21 1.38 GBP 0.89 0.85 0.74 0.78 0.83
Schedule of Sensitivity Analysis of Net Income and Shareholders' Equity	Sensitivity analysis of net income and shareholders’ equity to translation risk Movement of currency exchange rates 1) Estimated approximate effects on 2) Estimated approximate effects on 2017 Increase by 15% of USD currencies relative to the euro 260 2,159 Increase by 15% of GBP currencies relative to the euro 21 321 Increase by 15% of non-euro currencies relative to the euro 265 2,598 Decrease by 15% of USD currencies relative to the euro (189 ) (1,566 ) Decrease by 15% of GBP currencies relative to the euro (16 ) (216 ) Decrease by 15% of non-euro currencies relative to the euro (184 ) (1,868 ) 2016 Increase by 15% of USD currencies relative to the euro 87 2,179 Increase by 15% of GBP currencies relative to the euro (3 ) 259 Increase by 15% of non-euro currencies relative to the euro 79 2,537 Decrease by 15% of USD currencies relative to the euro (61 ) (1,558 ) Decrease by 15% of GBP currencies relative to the euro (55 ) (170 ) Decrease by 15% of non-euro currencies relative to the euro (110 ) (1,794 ) 1 The effect of currency exchange movements is reflected as a one-time shift up or down in the value of the non-euro currencies relative to the euro on December 31. 2 For the sensitivity analysis the book loss of the UK annuity portfolio in 2016 has been excluded.
Schedule of Interest Rate	The following table shows interest rates at the end of each of the last five years. 2017 2016 2015 2014 2013 3-month US LIBOR 1.69% 1.00% 0.61% 0.26% 0.25% 3-month EURIBOR (0.33% ) (0.32% ) (0.13% ) 0.08% 0.29% 10-year US Treasury 2.41% 2.43% 2.27% 2.17% 3.03% 10-year Dutch government 0.53% 0.35% 0.79% 0.68% 2.23%
Schedule of Parallel Movement of Yield Curve	Parallel movement of yield curve Estimated approximate effects on Estimated approximate effects on 2017 Shift up 100 basis points (282 ) (2,620 ) Shift down 100 basis points 200 2,160 2016 Shift up 100 basis points 364 (2,257 ) Shift down 100 basis points (300 ) 2,020
Schedule of Maximum Exposure to Credit Risk	The table that follows shows the Group’s maximum exposure to credit risk from investments in general account financial assets, as well as general account derivatives and reinsurance assets, collateral held and net exposure. Please refer to note 49 Transfer of financial assets for further information on collateral given, which may expose the Group to credit risk. 2017 Maximum Cash Secu- Letters of Real Master Other Total Surplus Net Debt securities - carried at fair value 84,344 - - 242 - - - 242 - 84,102 Debt securities - carried at amortized cost - - - 14 - - - 14 - (14 ) Money market and other short-term investments - carried at fair value 6,809 - 719 - - - - 719 25 6,115 Mortgage loans - carried at amortized cost 33,562 2,437 - 379 49,756 - - 52,573 19,271 260 Private loans - carried at amortized cost 3,642 79 - - - - - 79 - 3,563 Other loans - carried at amortized cost 2,164 - - - - - 1,886 1,886 1,195 1,473 Other financial assets - carried at fair value 2,586 - - - - - - - - 2,586 Derivatives 5,563 647 56 29 - 4,867 - 5,599 85 48 Reinsurance assets 19,200 - 4,395 137 - - - 4,532 - 14,667 At December 31 157,869 3,163 5,171 801 49,756 4,867 1,886 65,644 20,576 112,800 2016 Maximum Cash Securi- Letters of Real Master Other Total Surplus Net Debt securities - carried at fair value 103,169 - - 392 - - - 392 - 102,777 Money market and other short-term investments - carried at fair value 7,093 - 815 - - - - 815 27 6,306 Mortgage loans - carried at amortized cost 33,696 2,319 - 760 49,448 - - 52,527 19,198 366 Private loans - carried at amortized cost 3,166 67 - - - - - 67 - 3,099 Other loans - carried at amortized cost 2,441 - - - - - 2,197 2,197 1,326 1,570 Other financial assets - carried at fair value 3,425 - - - - - - - - 3,425 Derivatives 7,916 1,606 407 - - 5,841 - 7,855 47 109 Reinsurance assets 11,206 - 5,064 171 - - - 5,235 - 5,971 At December 31 172,113 3,992 6,287 1,322 49,448 5,841 2,197 69,087 20,598 123,623
Summary of Group Limits Per Credit Rating	Aegon group level long-term counterparty exposure limits are as follows: Group limits per credit rating Amounts in EUR million 2017 2016 AAA 900 900 AA 900 900 A 675 675 BBB 450 450 BB 250 250 B 125 125 CCC or lower 50 50
Schedule of Ratings Distribution of General Account Portfolios	The ratings distribution of general account portfolios of Aegon’s major reporting units, excluding reinsurance assets, are presented in the table that follows, organized by rating category and split by assets that are valued at fair value and assets that are valued at amortized cost. Aegon uses a composite rating based on a combination of the external ratings of S&P, Moody’s, Fitch and National Association of Insurance Commissioners (NAIC which is for US only) and internal ratings. The rating used is the lower of the external rating and the internal rating. Americas The Netherlands United Kingdom Central & Eastern Europe Spain & Portugal Credit rating general account investments, excluding reinsurance assets 2017 Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value AAA 958 18,935 1,658 12,727 - 137 - 1 - 9 AA 2,693 3,353 85 5,449 - 1,139 - 5 - 48 A 2,905 18,684 56 3,186 - 449 8 126 55 167 BBB 330 16,822 941 1,267 - 78 3 495 (3 ) 401 BB 18 1,567 18 22 - 9 72 92 - 20 B - 1,162 - - - - 2 1 - - CCC or lower - 793 - 3 - - - - - - Assets not rated 1,892 2,797 27,133 3,770 - 219 107 55 2 6 Total 8,796 64,114 29,890 26,425 - 2,031 193 775 54 651 Past due and / or impaired assets 35 1,145 299 41 - - 82 1 - - At December 31 8,831 65,259 30,189 26,467 - 2,031 275 777 54 651 Asia Asset Management Total 2017 1) Credit rating general account investments, excluding reinsurance assets 2017 Amortized Fair value Amortized Fair value Amortized Fair value Total AAA - 985 - 144 2,616 32,960 35,575 AA - 340 - - 2,778 10,334 13,111 A - 1,775 - - 3,024 24,399 27,423 BBB - 1,920 - - 1,271 20,983 22,254 BB - 140 - 1 107 1,852 1,959 B - 117 - 4 2 1,284 1,287 CCC or lower - 23 - 4 - 823 823 Assets not rated 6 1 - 4 29,154 7,011 36,165 Total 6 5,300 - 157 38,951 99,645 138,597 Past due and / or impaired assets - 20 - - 416 1,207 1,624 At December 31 6 5,320 - 157 39,368 100,853 140,221 1 Includes investments of Holding and other activities. Americas The Netherlands United Kingdom Central & Eastern Europe Spain & Portugal Credit rating general account investments, excluding reinsurance assets 2016 Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value Amortized Fair value AAA 1,560 21,580 1,628 13,020 - 171 - 2 - 12 AA 3,214 6,102 86 6,011 - 1,158 - 1 - 58 A 3,281 25,147 12 3,397 - 549 8 116 48 157 BBB 481 21,461 850 2,402 - 85 20 433 (6 ) 436 BB 70 1,964 18 107 - 90 56 80 - 18 B - 1,207 - 10 - 2 4 1 - 3 CCC or lower - 1,049 - - - - - - - - Assets not rated 2,196 3,847 25,133 4,792 - 215 111 44 3 3 Total 10,802 82,357 27,727 29,740 - 2,269 201 676 45 687 Past due and / or impaired assets 17 1,397 390 77 - - 102 2 - - At December 31 10,820 83,755 28,117 29,817 - 2,269 303 678 45 687 Asia Asset Management Total 2016 1) Credit rating general account investments, excluding Amortized Fair value Amortized Fair value Amortized Fair value Total carrying AAA - 950 - - 3,189 35,758 38,946 AA - 402 - - 3,300 13,731 17,032 A - 1,823 - - 3,349 31,204 34,553 BBB - 1,904 - - 1,346 26,721 28,067 BB - 132 - - 145 2,391 2,536 B - 57 - - 5 1,279 1,284 CCC or lower - 28 - - - 1,078 1,078 Assets not rated 18 - - 90 27,460 9,267 36,727 Total 18 5,297 - 90 38,793 121,429 160,222 Past due and / or impaired assets - 13 - - 510 1,489 1,999 At December 31 18 5,310 - 90 39,303 122,918 162,221 1 Includes investments of Holding and other activities.
Summary of Credit Quality of Gross Positions of Reinsurance Assets	The following table shows the credit quality of the gross positions in the statement of financial position for general account reinsurance assets specifically: Carrying value 2017 Carrying value 2016 AAA - 7 AA 13,379 7,724 A 5,242 3,120 Below A 24 18 Not rated 555 338 At December 31 19,200 11,206
Schedule of Credit Risk Concentration	The tables that follow present specific credit risk concentration information for general account financial assets. Credit risk concentrations – debt securities and money market investments 2017 Americas The United Central & Spain & Asia Asset Total 2017 1) Of which Residential mortgage-backed securities (RMBSs) 3,025 556 17 - - 57 - 3,655 1,022 Commercial mortgage-backed securities (CMBSs) 3,375 28 146 - - 537 - 4,086 10 Asset-backed securities (ABSs) - CDOs backed by ABS, Corp. bonds, Bank loans 751 1,529 - - - 47 - 2,327 3 ABSs – Other 1,688 270 88 - 1 331 - 2,378 35 Financial - Banking 6,525 1,440 124 102 104 730 - 9,026 3 Financial - Other 9,028 212 58 3 114 498 137 10,069 4 Industrial 21,975 1,726 255 7 129 2,344 - 26,435 62 Utility 3,386 119 65 3 45 309 - 3,927 - Government bonds 11,319 15,531 1,060 603 253 466 17 29,249 14 At December 31 61,073 21,411 1,812 718 646 5,319 153 91,153 1,154 1 Includes investments of Holding and other activities. Credit risk concentrations – Government bonds per country of risk 2017 Americas The United Central & Spain & Asia Asset Total 2017 1 ) United States 10,501 32 - - - 372 - 10,906 Netherlands - 5,777 - - 4 - - 5,781 United Kingdom - - 946 1 - - 17 964 Austria - 1,154 - - 4 - - 1,158 Belgium - 1,065 23 - 6 - - 1,094 Finland - 938 - - - - - 938 France - 1,216 34 - 5 - - 1,255 Germany - 4,233 28 - - - - 4,261 Hungary 3 - - 402 - - - 405 Luxembourg - 785 - - 1 - - 786 Spain - 89 - 2 203 - - 294 Rest of Europe 133 205 - 198 16 17 - 568 Rest of world 652 36 29 - 14 77 - 809 Supranational 30 - - - - - - 30 At December 31 11,319 15,531 1,060 603 253 466 17 29,249 1 Includes investments of Holding and other activities. Credit risk concentrations – Credit rating 2017 2) Government Corporate bonds RMBSs CMBSs Other Total 2017 1) AAA 21,855 792 7,102 3,157 32,906 AA 5,462 2,879 1,700 - 10,040 A 311 20,765 1,443 - 22,520 BBB 1,198 19,045 396 6 20,646 BB 269 1,395 178 - 1,842 B 152 1,011 111 - 1,273 CCC or lower 2 309 1,516 - 1,828 Assets not rated - 3 - 95 98 At December 31 29,249 46,199 12,446 3,258 91,153 1 Includes investments of Holding and other activities. 2 CNLP Ratings are used and are the lower of the Barclay’s Rating and the Internal Rating with the Barclay’s rating being a blended rating of S&P, Fitch, and Moody’s. Credit risk concentrations – debt securities and money market investments 2016 Americas The United Central & Spain & Asia Asset Total 2016 1) Of which Residential mortgage-backed securities (RMBSs) 3,583 649 19 - - 80 - 4,331 1,267 Commercial mortgage-backed securities (CMBSs) 5,340 44 195 - - 576 - 6,155 8 Asset-backed securities (ABSs) - CDOs backed by ABS, Corp. bonds, Bank loans 1,066 2,437 - - - 29 - 3,532 7 ABSs – Other 2,324 276 97 - 1 373 - 3,072 36 Financial - Banking 8,457 1,194 157 67 110 800 - 10,785 4 Financial - Other 10,487 282 118 6 120 465 87 11,588 - Industrial 29,364 2,824 332 7 126 2,367 - 35,020 65 Utility 4,704 392 67 3 43 280 - 5,490 7 Government bonds 12,406 15,642 1,068 553 282 339 - 30,289 4 At December 31 77,730 23,741 2,054 636 683 5,310 87 110,262 1,399 1 Includes investments of Holding and other activities. Credit risk concentrations – Government bonds per country of risk 2016 Americas The Netherlands United Kingdom Central & Eastern Europe Spain & Portugal Asia Asset Manage- ment Total 2016 1) United States 11,738 22 - - - 300 - 12,060 Netherlands - 5,374 - - 4 - - 5,378 United Kingdom - - 948 2 - - - 949 Austria - 1,171 - - 4 - - 1,175 Belgium - 1,119 25 - 7 - - 1,151 Finland - 935 - - - - - 935 France - 1,356 36 - 5 - - 1,397 Germany - 4,138 29 - - - - 4,167 Hungary 4 - - 360 - - - 364 Luxembourg - 872 - - 4 - - 876 Spain - 112 - 2 221 - - 335 Rest of Europe 118 484 - 189 18 - - 808 Rest of world 506 59 30 - 20 39 - 654 Supranational 40 - - - - - - 40 At December 31 12,406 15,642 1,068 553 282 339 - 30,289 1 Includes investments of Holding and other activities. Credit risk concentrations – Credit rating 2016 2) Government bonds Corporate bonds RMBSs CMBSs ABSs Other Total 2016 1) AAA 22,620 912 9,809 2,362 35,704 AA 5,682 4,835 2,645 - 13,161 A 569 26,291 1,740 - 28,599 BBB 1,166 24,662 540 3 26,370 BB 158 1,943 274 - 2,376 B 91 1,023 145 - 1,260 CCC or lower 4 386 1,937 - 2,326 Assets not rated - 4 - 462 466 At December 31 30,289 60,055 17,090 2,827 110,262 1 Includes investments of Holding and other activities. 2 CNLP Ratings are used and are the lower of the Barclay’s Rating and the Internal Rating with the Barclay’s rating being a blended rating of S&P, Fitch, and Moody’s. Credit risk concentrations – mortgage loans 2017 Americas The United Central & Spain & Asia Asset Total 2017 1) Of which Agricultural 77 - - - - - - 77 8 Apartment 3,371 - - - - - - 3,371 - Industrial 631 - - - - - - 631 7 Office 1,226 - - - - - - 1,226 - Retail 1,375 11 - - - - - 1,385 19 Other commercial 256 38 - - - - - 294 2 Residential 16 26,384 - 176 1 - - 26,578 343 At December 31 6,951 26,434 - 176 1 - - 33,562 379 1 Includes investments of Holding and other activities. Credit risk concentrations – mortgage loans 2016 Americas The United Central & Spain & Asia Asset Total 2016 1) Of which Agricultural 101 - - - - - - 101 11 Apartment 3,525 - - - - - - 3,525 - Industrial 838 - - - - - - 838 - Office 1,869 1 - - - - - 1,869 1 Retail 1,889 12 - - - - - 1,901 5 Other commercial 397 41 - - - - - 438 - Residential 23 24,793 - 207 1 - - 25,023 448 At December 31 8,641 24,847 - 207 1 - - 33,696 464 1 Includes investments of Holding and other activities.
Summary of Income Received From Investments in RMBSs, SMBSs and ABSs	Total income 2017 December 31, 2017 2017 Interest income Total gains and Total Investments Residential mortgage-backed securities 174 95 269 3,655 Commercial mortgage-backed securities 159 53 212 4,086 Asset-backed securities 56 26 82 2,327 ABSs - Other 87 71 158 2,378 Total 476 245 721 12,446 Total income 2016 December 31, 2016 2016 Interest income Total gains and Total Investments Residential mortgage-backed securities 215 61 276 4,331 Commercial mortgage-backed securities 191 28 219 6,155 Asset-backed securities 64 12 75 3,532 ABSs - Other 85 7 92 3,072 Total 555 107 662 17,090
Summary of Amortized Cost and Fair Value of Debt Securities	The amortized cost and fair value of debt securities, money market investments and other, included in Aegon’s available-for-sale (AFS) portfolios, are as follows as of December 31, 2017, and December 31, 2016 2017 Amortized Unrealized Unrealized Total fair Fair value of Fair value of Debt securities, money market instruments and other United States government 8,011 936 (101) 8,846 6,805 2,041 Dutch government 4,799 992 (11) 5,781 4,885 896 Other government 11,746 838 (17) 12,568 11,501 1,067 Mortgage-backed securities 7,326 424 (56) 7,694 5,569 2,126 Asset-backed securities 4,624 92 (17) 4,698 3,878 820 Corporate 37,168 3,663 (218) 40,613 34,945 5,668 Money market investments 6,690 - - 6,690 5,642 1,048 Other 765 98 (73) 791 597 193 Total 81,130 7,043 (493) 87,681 73,822 13,858 Of which held by Aegon Americas, NL and UK 74,672 6,665 (464 ) 80,873 68,385 12,488 2016 Amortized Unrealized Unrealized Total fair Fair value of Fair value of Debt securities, money market instruments and United States government 11,452 882 (343) 11,990 7,012 4,979 Dutch government 4,164 1,215 (5) 5,374 5,286 87 Other government 11,788 1,096 (20) 12,865 12,278 586 Mortgage-backed securities 10,099 453 (156) 10,396 6,543 3,853 Asset-backed securities 6,568 88 (64) 6,592 4,192 2,399 Corporate 50,431 4,073 (668) 53,837 42,361 11,476 Money market investments 6,776 - - 6,776 6,758 18 Other 1,019 228 (41) 1,206 1,168 38 Total 102,298 8,035 (1,297) 109,036 85,599 23,436 Of which held by Aegon Americas, NL and UK 95,806 7,739 (1,217 ) 102,329 81,335 20,993
Summary of Composition by Industry Category of Available-for-sale (AFS) Debt Securities, Money Market Investments and Other in an Unrealized Loss Position	The composition by industry category of Aegon’s available-for-sale (AFS) debt securities, money market investments and other in an unrealized loss position at December 31, 2017, and December 31, 2016, is presented in the following table: December 31, 2017 December 31, 2016 Unrealized losses - debt securities, money market investments and other Carrying value of Unrealized Carrying value of Unrealized Residential mortgage-backed securities (RMBSs) 732 (30 ) 1,588 (83 ) Commercial mortgage-backed securities (CMBSs) 1,140 (22 ) 2,027 (67 ) Asset-backed securities (ABSs) - CDOs backed by ABS, Corp.bonds, Bank loans 87 (2 ) 958 (11 ) ABSs - Other 603 (13 ) 1,130 (43 ) Financial Industry - Banking 663 (39 ) 1,679 (135 ) Financial Industry - Insurance 231 (7 ) 554 (34 ) Financial Industry - Other 1,411 (10 ) 618 (28 ) Industrial 3,330 (132 ) 6,216 (369 ) Utility 375 (14 ) 836 (45 ) Government 3,722 (123 ) 5,349 (361 ) Other 193 (73 ) 38 (41 ) Total held by Aegon Americas, NL and UK 12,488 (464 ) 20,993 (1,217 ) Held by other segments 1,371 (29 ) 2,443 (80 ) Total 13,858 (493 ) 23,436 (1,297 )
Summary of Breakdown of RMBS Available-for-sale (AFS) Portfolio	The following table shows the breakdown of Aegon USA’s RMBS available-for-sale (AFS) portfolio. AFS RMBS by quality AAA AA A BBB <BBB Total Total GSE guaranteed 1,025 270 - - - 1,295 1,298 Prime jumbo - - - 5 124 130 136 Alt-A - 33 20 8 277 337 437 Negative amortization floaters - - - - 502 502 584 Other housing - 9 17 30 397 453 530 At December 31, 2017 1,025 312 37 43 1,300 2,717 2,985 Of which insured - - 24 5 146 175 166 AFS RMBS by quality AAA AA A BBB <BBB Total Total GSE guaranteed 771 500 - - - 1,272 1,271 Prime jumbo - 1 1 11 170 182 194 Alt-A - 39 27 11 403 479 572 Negative amortization floaters - - - 1 679 679 712 Other housing - 50 71 43 519 683 745 At December 31, 2016 771 589 98 65 1,771 3,295 3,494 Of which insured - - 43 8 203 254 237
Summary of Credit Quality of Available-For-Sale (AFS) CMBS Portfolio	The tables below summarize the credit quality of Aegon USA’s available-for-sale (AFS) CMBS portfolio. Additionally, Aegon USA has no investments in CMBS (December 31, 2016: EUR nil), which are classified as fair value through profit or loss. CMBS by quality AAA AA A BBB <BBB Total amortized cost Total fair value CMBS 2,626 559 63 3 84 3,335 3,372 CMBS and CRE CDOs - - - - 4 4 3 At December 31, 2017 2,626 559 63 3 88 3,339 3,375 CMBS by quality AAA AA A BBB <BBB Total amortized cost Total fair value CMBS 4,295 688 141 73 105 5,301 5,337 CMBS and CRE CDOs - - - - 5 5 3 At December 31, 2016 4,295 688 141 73 110 5,306 5,340
Summary of Breakdown of Quality of Available-for-sale (AFS) ABS Portfolio	The breakdown by quality of the available-for-sale (AFS) ABS portfolio of Aegon USA, Aegon the Netherlands and Aegon UK is as follows: ABS US, NL and UK AAA AA A BBB <BBB Total amortized cost Total fair value Credit cards 170 19 - 30 - 219 229 Autos 226 - 64 2 - 292 292 Small business loans - - 3 6 62 70 74 CDOs backed by ABS, Corp. bonds, Bank loans 1,467 407 224 120 46 2,265 2,281 Other ABS 494 76 738 81 6 1,395 1,438 At December 31, 2017 2,357 503 1,029 238 114 4,242 4,314 ABS US, NL and UK AAA AA A BBB <BBB Total amortized cost Total fair value Credit cards 482 28 35 30 - 575 589 Autos 277 9 46 42 - 375 374 Small business loans - 1 7 6 104 118 116 CDOs backed by ABS, Corp. bonds, Bank loans 2,108 790 368 134 94 3,493 3,504 Other ABS 627 165 697 85 22 1,596 1,606 At December 31, 2016 3,495 992 1,153 296 220 6,156 6,188
Summary of Composition by Maturity of all Available-for-sale Debt Securities in an Unrealized Loss Position	The table below shows the composition by maturity of all available-for-sale debt securities in an unrealized loss position held by Aegon Americas, Aegon the Netherlands and Aegon UK. December 31, 2017 December 31, 2016 Debt securities Carrying value of securities with gross unrealized losses Gross unrealized losses Carrying value of securities with gross unrealized losses Gross unrealized losses One year or less 466 (6 ) 742 (13 ) Over 1 through 5 years 1,937 (31 ) 2,444 (73 ) Over 5 through 10 years 4,580 (95 ) 6,097 (197 ) Over 10 years 4,263 (258 ) 11,656 (892 ) Total 11,246 (391 ) 20,938 (1,176 )
Summary of Composition by Credit Quality of Debt Securities, Available-for-sale, in an Unrealized Loss Position	The table below shows the composition by credit quality of debt securities, available-for-sale, in an unrealized loss position held by Aegon Americas, Aegon the Netherlands and Aegon UK. December 31, 2017 December 31, 2016 Debt securities Carrying value of securities with unrealized losses Unrealized losses Carrying value of securities with unrealized losses Unrealized losses AAA 4,924 (135 ) 8,536 (422 ) AA 1,037 (17 ) 1,581 (48 ) A 1,775 (45 ) 3,599 (154 ) BBB 2,339 (70 ) 5,249 (288 ) BB 507 (39 ) 920 (128 ) B 323 (32 ) 345 (40 ) Below B 341 (54 ) 706 (96 ) Total 11,246 (391 ) 20,938 (1,176 )
Summary of Available-for-sale Debt Securities With Unrealized Losses by Investment and Length of Time Individual Securities	The table below provides the length of time an available-for-sale security has been below cost and the respective unrealized loss. At December 31, 2017 Debt securities Investment grade carrying value of securities with unrealized losses Below investment grade carrying value of securities with unrealized losses Investment grade unrealized loss Below investment grade unrealized loss 0 – 6 months 4,106 485 (46 ) (15 ) 6 – 12 months 1,479 62 (9 ) (5 ) > 12 months 4,490 624 (211 ) (105 ) Total 10,076 1,171 (266 ) (125 ) At December 31, 2016 Debt securities Investment grade carrying value of securities with unrealized losses Below investment grade carrying value of securities with unrealized losses Investment grade unrealized loss Below investment grade unrealized loss 0 – 6 months 14,848 587 (635 ) (30 ) 6 – 12 months 190 198 (6 ) (20 ) > 12 months 3,929 1,186 (270 ) (213 ) Total 18,966 1,971 (912 ) (263 ) The unrealized loss improved during 2017 due to tightening credit spreads and declining long term interest rates, which was offset slightly by rising short term interest rates. Aging and severity unrealized losses The table below provides the length of time a below investment grade security has been in an unrealized loss and the percentage of carrying value (CV) to amortized cost in Aegon Americas, Aegon the Netherlands and Aegon UK. 2017 2016 Aging and severity unrealized losses debt securities Carrying value Unrealized losses Carrying value Unrealized losses CV 70-100% of amortized cost 482 (13 ) 585 (27 ) CV 40-70% of amortized cost 3 (2 ) 2 (2 ) CV < 40% of amortized cost - - 1 (2 ) 0-6 months 485 (15 ) 587 (30 ) CV 70-100% of amortized cost 62 (5 ) 196 (18 ) CV 40-70% of amortized cost - - 3 (2 ) CV < 40% of amortized cost - - - - 6-12 months 62 (5 ) 198 (20 ) CV 70-100% of amortized cost 67 (10 ) 475 (55 ) CV 40-70% of amortized cost 8 (4 ) 3 (2 ) CV < 40% of amortized cost - - - (3 ) 12-24 months 75 (13 ) 478 (60 ) CV 70-100% of amortized cost 511 (63 ) 582 (71 ) CV 40-70% of amortized cost 30 (16 ) 119 (67 ) CV < 40% of amortized cost 8 (12 ) 7 (15 ) > 24 months 549 (92 ) 708 (153 ) Total 1,171 (125 ) 1,971 (263 )
Summary of Realized Gains and Losses on Debt Securities	The following table provides the realized gains and losses on the debt securities of Aegon Americas, Aegon the Netherlands and Aegon UK for the twelve months ended December 31, 2017, and December 31, 2016. Gross realised gains in 2017 decreased compared to 2016 due to the sale of the UK annuity portfolio in 2016. Gross realized gains and (losses) Gross realized gains Gross realized losses December 31, 2017 Debt securities 1,876 (173 ) December 31, 2016 Debt securities 2,257 (323 )
Summary of Length of Time Security and Respective Realized Loss	The table below provides the length of time the security was below cost prior to the sale and the respective realized loss for assets not considered impaired. Gross realized losses 0 -12 months >12 months Total December 31, 2017 Debt securities (137 ) (36 ) (173 ) December 31, 2016 Debt securities (221 ) (103 ) (323 )
Summary of Composition of Impairment Losses and Recoveries	2017 2016 (Impairment) / recovery (Impairment) / recovery Impairments: Other (none individually greater than EUR 25 million) (16 ) (52 ) Subtotal (16 ) (52 ) Recoveries: Total recoveries 16 42 Sub-total 16 42 Net (impairments) and recoveries - (11 )
Summary of Financial Assets that are Either Past Due or Impaired	2017 2016 Past due but not impaired assets 0-6 months 6-12 months > 1 year Total 0-6 months 6-12 months > 1 year Total Debt securities - carried at fair value 49 14 28 91 58 9 7 73 Mortgage loans 111 2 4 117 80 4 3 87 Other loans 31 1 3 35 29 4 2 36 Accrued interest - 1 1 1 - - 1 1 At December 31 191 18 35 244 167 17 13 197 Impaired financial assets Carrying amount 2017 Carrying amount Shares 48 81 Debt securities - carried at fair value 1,063 1,326 Mortgage loans 262 377 Private Loans - 6 Other loans 3 3 Other financial assets - carried at fair value 6 9 At December 31 1,381 1,803
Summary of Unrealized Gains and Losses on Share Positions	The table below represents the unrealized gains and losses on share positions held by Aegon Americas, Aegon the Netherlands and Aegon UK. Cost basis Carrying value Net unrealized gains / (losses) Carrying value of securities with gross unrealized gains Gross unrealized gains Carrying value of securities with gross unrealized losses Gross unrealized losses December 31, 2017 Shares 386 434 49 401 62 34 (13 ) December 31, 2016 Shares 596 786 190 722 202 64 (13 )
Summary of Composition of Shares by Industry Sector in Unrealized Loss Position	The composition of shares by industry sector in an unrealized loss position held by Aegon Americas, Aegon the Netherlands and Aegon UK at December 31, 2017, and December 31, 2016 is presented in the following table. 2017 2016 Unrealized losses on shares Carrying value of instruments with unrealized losses Unrealized losses Carrying value of instruments with unrealized losses Unrealized losses Financials 19 (12 ) 54 (12 ) Other 14 (2 ) 10 - Total 34 (13 ) 64 (13 )
Summary of Shares Cost Prior to Impairment	The table below provides the length of time the shares held by Aegon Americas, Aegon the Netherlands and Aegon UK were below cost prior to their impairment in 2017 and 2016. In million EUR 0-6 months 2017 Shares - 2016 Shares (1 )
Summary of General Account Equity Real Estate and Other Non-fixed-income Portfolio	The general account equity, real estate and other non-fixed-income portfolio of Aegon is as follows: Equity, real estate and non-fixed income exposure Americas The Netherlands United Kingdom Central & Eastern Europe Spain & Portugal Asia Asset Manage- ment Holding and other activities Total 2017 Equity funds 142 161 - 47 - - - - 351 Common shares 1) 232 - 5 8 4 1 - 40 290 Preferred shares 192 - - - - - - - 192 Investments in real estate 633 1,495 - 4 15 - - - 2,147 Hedge funds 688 1 - - - - 2 - 691 Other alternative investments 1,122 309 - - - - - 18 1,448 Other financial assets 556 410 194 2 2 - 1 - 1,165 At December 31 3,566 2,375 199 62 20 1 4 57 6,284 1  Equity, real estate and non-fixed income exposure Americas The Netherlands United Kingdom Central & Eastern Europe Spain & Portugal Asia Asset Manage- ment Holding and other Total 2016 Equity funds 154 494 27 37 - - - - 711 Common shares 1) 410 - 58 5 4 - - 41 518 Preferred shares 229 - - - - - - - 229 Investments in real estate 743 1,238 - 3 15 - - - 1,999 Hedge funds 1,165 1 - - - - 2 - 1,168 Other alternative investments 1,207 156 - - - - - 21 1,385 Other financial assets 588 41 98 1 - - 1 - 729 At December 31 4,496 1,930 182 45 19 - 4 62 6,739
Summary of Market Risk Concentrations in Shares	Market risk concentrations – shares Americas The United Central & Spain & Asia Asset Total 2017 1) Of which Communication 28 — — — — — — 28 — Consumer 8 — — — — — — 8 — Financials 491 3 1 — 3 1 — 499 1 Funds — 852 4 53 2 — — 968 43 Industries 19 — — — — — — 19 — Other 22 4 — 2 — — 2 30 4 At December 31 567 859 5 54 5 1 2 1,551 48 1 Includes investments of Holding and other activities. Market risk concentrations – shares Americas The United Central & Spain & Asia Asset Total 2016 1) Of which Communication 43 — — — — — — 43 — Consumer 41 — — — — — — 41 — Financials 675 4 1 — 2 — — 682 2 Funds — 326 84 33 2 — — 506 79 Industries 21 — — — — — — 22 — Other 12 4 — 2 — — 2 20 — At December 31 793 334 84 35 4 — 2 1,315 81 1 Includes investments of Holding and other activities.
Summary of Closing Levels of Certain Major Indices	The table that follows sets forth the closing levels of certain major indices at the end of the last five years. 2017 2016 2015 2014 2013 S&P 500 2,674 2,239 2,044 2,059 1,848 Nasdaq 6,903 5,383 5,007 4,736 4,177 FTSE 100 7,688 7,143 6,242 6,566 6,749 AEX 545 483 442 424 402
Summary of Sensitivity Analysis of Net Income and Shareholders' Equity to Equity Markets	ensitivity analysis of net income and shareholders’ equity to equity markets Immediate change of Estimated approximate effects on net income Estimated approximate effects on shareholders’ equity 2017 Equity increase 10% 317 405 Equity decrease 10% (316 ) (405 ) Equity increase 20% 647 820 Equity decrease 20% (660 ) (839 ) 2016 Equity increase 10% 158 291 Equity decrease 10% (227 ) (360 ) Equity increase 20% 324 587 Equity decrease 20% (338 ) (604 )
Summary of Maturity Analysis Gross Undiscounted Contractual Cash Flows	Maturity analysis – gross undiscounted contractual cash flows (for non- derivatives) On demand < 1 yr amount 1 < 5 yrs amount 5 < 10 yrs amount > 10 yrs amount Total amount 2017 Trust pass-through securities - 9 34 110 68 221 Subordinated loans - 28 112 56 1,137 1,333 Borrowings - 1,888 8,396 2,411 2,668 15,362 Investment contracts 1) 12,189 1,381 1,591 577 1,709 17,448 Investment contracts for account of policyholders 1) 33,738 2,605 1 1 133 36,478 Other financial liabilities 6,277 2,002 791 23 32 9,125 2016 Trust pass-through securities - 10 39 131 81 261 Subordinated loans - 28 112 84 1,198 1,422 Borrowings - 2,072 5,146 1,535 6,693 15,446 Investment contracts 1) 12,695 1,110 2,040 1,093 1,985 18,923 Investment contracts for account of policyholders 1) 35,239 2,885 - - 466 38,591 Other financial liabilities 6,743 2,224 839 12 26 9,844 1
Summary of Financial Liabilities Relating to Insurance and Investment Contracts	The cash benefit payments are presented on an undiscounted basis and are before deduction of tax and before reinsurance.   Financial liabilities relating to insurance and investment contracts 1) On demand < 1 yr amount 1 < 5 yrs amount 5 < 10 yrs amount > 10 yrs amount Total amount 2017 Insurance contracts - 3,865 16,348 17,155 122,702 160,070 Insurance contracts for account of policyholders - 8,122 33,916 35,391 123,911 201,339 Investment contracts - 5,961 6,870 2,510 4,620 19,960 Investment contracts for account of policyholders 234 10,117 23,871 21,202 54,930 110,353 2016 Insurance contracts - 4,522 18,361 18,712 135,679 177,275 Insurance contracts for account of policyholders - 7,719 32,577 33,490 114,545 188,331 Investment contracts - 5,278 7,574 2,814 9,635 25,303 Investment contracts for account of policyholders 292 10,328 25,850 22,867 63,798 123,136 1 The liability amount in the consolidated financial statements reflects the discounting for interest as well as adjustments for the timing of other factors as described above. As a result, the sum of the cash benefit payments shown for all years in the table exceeds the corresponding liability amounts included in notes 36 Insurance contracts and 37 Investments contracts.
Summary Of Maturity Analysis For Derivative Financial Instruments	The following table details the Group’s liquidity analysis for its derivative financial instruments, based on the undiscounted contractual net cash inflows and outflows on derivative instruments that settle on a net basis, and the undiscounted gross inflows and outflows on those derivatives that require gross settlement. Maturity analysis relating to derivatives 1) (Contractual cash flows) 2017 On demand < 1 yr 1 < 5 yrs 5 < 10 yrs > 10 yrs Total Gross settled Cash inflows - 14,646 7,024 10,658 18,916 51,245 Cash outflows - (14,766 ) (6,367 ) (9,890 ) (18,447 ) (49,471 ) Net settled Cash inflows - 129 783 1,033 2,428 4,374 Cash outflows - (67 ) (332 ) (543 ) (5,870 ) (6,812 ) 1   Maturity analysis relating to derivatives 1) (Contractual cash flows) 2016 On demand < 1 yr amount 1 < 5 yrs 5 < 10 yrs > 10 yrs Total amount Gross settled Cash inflows - 18,933 6,154 10,862 19,084 55,034 Cash outflows - (19,794 ) (6,435 ) (9,807 ) (18,227 ) (54,263 ) Net settled Cash inflows - 222 1,014 1,635 3,984 6,855 Cash outflows - (123 ) (417 ) (789 ) (7,278 ) (8,607 ) 1 Derivatives includes all financial derivatives regardless whether they have a positive or a negative value. It does not include bifurcated embedded derivatives. These are presented together with the host contract. For interest rate derivatives only, cash flows related to the pay leg are taken into account for determining the gross undiscounted cash flows.
Life insurance general account [member]
Summary of Financial Liabilities Relating to Insurance and Investment Contracts	Movements during the year in reinsurance assets relating to Life insurance Life insurance for Total life insurance At January 1, 2017 9,714 2 9,716 Gross premium and deposits – existing and new business 11,326 6 11,332 Unwind of discount / interest credited 533 - 533 Insurance liabilities released (2,877 ) (3 ) (2,880 ) Fund charges released (49 ) - (49 ) Changes to valuation of expected future benefits 823 - 823 Policy transfers (38 ) - (38 ) Net exchange differences (1,698 ) - (1,697 ) Transfers to disposal groups (239 ) (3 ) (242 ) Transfer to/from insurance contract 23 - 23 Other movements (97 ) - (97 ) At December 31, 2017 17,419 2 17,421 At January 1, 2016 9,677 64 9,741 Gross premium and deposits – existing and new business 13,108 897 14,005 Unwind of discount / interest credited 783 23 806 Insurance liabilities released (5,965 ) 15 (5,950 ) Fund charges released (11 ) - (11 ) Changes to valuation of expected future benefits 38 - 38 Policy transfers (14 ) - (14 ) Net exchange differences 183 (6 ) 177 Transfers to disposal groups (8,085 ) (991 ) (9,076 ) At December 31, 2016 9,714 2 9,716
Non-life insurance [member]
Summary of Financial Liabilities Relating to Insurance and Investment Contracts	Movements during the year in reinsurance assets relating to non-life insurance: 2017 2016 At January 1 1,481 1,503 Gross premium and deposits – existing and new business 99 111 Unwind of discount / interest credited 89 89 Insurance liabilities released (129 ) (148 ) Changes to valuation of expected future benefits 28 (57 ) Changes in unearned premiums (42 ) (37 ) Incurred related to current year 85 66 Incurred related to prior years 37 30 Release for claims settled current year (19 ) (12 ) Release for claims settled prior years (119 ) (117 ) Change in IBNR (8 ) (2 ) Shadow accounting adjustment 6 19 Net exchange differences (180 ) 41 Portfolio transfers and acquisitions 2 - Other movements (4 ) (5 ) At December 31 1,327 1,481

Transfers of financial assets (

Transfers of financial assets (Tables)	12 Months Ended
	Dec. 31, 2017
Schedule of Fair Values of Available-for-sale (AFS) Instruments	Securities lending 2017 2016 Carrying amount of transferred financial assets 4,987 4,262 Fair value of cash collateral received 3,277 3,633 Fair value of non-cash collateral received 1,847 1,077 Net exposure (138 ) (448 ) Non-cash collateral that can be sold or repledged in the absence of default 1,550 991 Non-cash collateral that has been sold or transferred - -
Summary of Carrying Amount of Financial Assets	49.1 Transferred financial assets that have not been derecognized in their entirety The following table reflects the carrying amount of financial assets that have been transferred to another party in such a way that part or all of the transferred financial assets do not qualify for derecognition. Furthermore, it reflects the carrying amounts of the associated liabilities. 2017 Available-for-sale financial assets Financial assets at fair value through Shares Debt securities Debt securities Investments for Carrying amount of transferred assets 114 5.805 54 384 Carrying amount of associated liabilities 122 5,929 55 93 2016 Available-for-sale financial assets Financial assets at fair value through Shares Debt securities Debt securities Investments for Carrying amount of transferred assets 226 5,298 20 194 Carrying amount of associated liabilities 242 5,400 21 204
Summary of Reverse Repurchase Agreements	Reverse repurchase agreements 2017 2016 Cash paid for reverse repurchase agreements 4,859 4,075 Fair value of non-cash collateral received 4,885 4,103 Net exposure (25 ) (27 ) Non-cash collateral that can be sold or repledged in the absence of default 4,166 3,288 Non-cash collateral that has been sold or transferred - -
Summary of Carrying Amount of Collateral Pledged and the Corresponding Amounts	The following tables present the carrying amount of collateral pledged and the corresponding amounts. Assets pledged for general account and contingent liabilities 2017 2016 General account (contingent) liabilities 5,588 6,440 Collateral pledged 6,951 8,115 Net exposure (1,363 ) (1,675 ) Non-cash collateral that can be sold or repledged by the counterparty - - Assets pledged for repurchase agreements 2017 2016 Cash received on repurchase agreements 1,373 1,489 Collateral pledged (transferred financial assets) 1,370 1,477 Net exposure 3 12
Residential mortgage- backed securities [member]
Schedule of Fair Values of Available-for-sale (AFS) Instruments	The following table shows the breakdown of Aegon USA’s RMBS available-for-sale (AFS) portfolio. AFS RMBS by quality AAA AA A BBB <BBB Total Total GSE guaranteed 1,025 270 - - - 1,295 1,298 Prime jumbo - - - 5 124 130 136 Alt-A - 33 20 8 277 337 437 Negative amortization floaters - - - - 502 502 584 Other housing - 9 17 30 397 453 530 At December 31, 2017 1,025 312 37 43 1,300 2,717 2,985 Of which insured - - 24 5 146 175 166 AFS RMBS by quality AAA AA A BBB <BBB Total Total GSE guaranteed 771 500 - - - 1,272 1,271 Prime jumbo - 1 1 11 170 182 194 Alt-A - 39 27 11 403 479 572 Negative amortization floaters - - - 1 679 679 712 Other housing - 50 71 43 519 683 745 At December 31, 2016 771 589 98 65 1,771 3,295 3,494 Of which insured - - 43 8 203 254 237
Commercial mortgage- backed securities (CMBSs) [member]
Schedule of Fair Values of Available-for-sale (AFS) Instruments	The fair values of Aegon USA’s available-for-sale (AFS) CMBS instruments were determined as follows: Level II Level III Total 2017 Level II Level III Total 2016 CMBS 3,372 3 3,375 5,337 3 5,340
Asset backed securities [member]
Schedule of Fair Values of Available-for-sale (AFS) Instruments	The fair values of Aegon USA, Aegon the Netherlands and Aegon UK available-for-sale (AFS) ABS instruments were determined as follows: Level II Level III Total 2017 Level II Level III Total 2016 ABSs 3,411 903 4,314 4,880 1,309 6,188

Segment information (Tables)

Segment information (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Segment Results	The following table presents Aegon’s segment results. Income statement - Underlying earnings LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Underlying earnings before tax 1,381 520 116 67 4 49 136 (170 ) - 2,103 61 2,163 Fair value items 170 30 (82 ) - - - - 24 - 142 (97 ) 45 Realized gains / (losses) on investments 157 184 62 1 - 4 3 - - 413 (5 ) 408 Impairment charges (38 ) (27 ) - (2 ) - (1 ) - (3 ) - (71 ) - (71 ) Impairment reversals 22 10 - - - - - - - 32 - 32 Other income / (charges) (353 ) 296 40 - - (19 ) (49 ) 16 - (68 ) (4 ) (72 ) Run-off businesses 30 - - - - - - - - 30 - 30 Income / (loss) before tax 1,369 1,013 137 66 4 33 90 (134 ) - 2,579 (44 ) 2,534 Income tax (expense) / benefit 198 (196 ) (56 ) (9 ) (6 ) (28 ) (42 ) 29 - (110 ) 44 (65 ) Net income / (loss) 1,567 818 81 57 (2 ) 5 48 (105 ) - 2,469 - 2,469 Inter-segment underlying earnings (78 ) (111 ) (87 ) (11 ) (1 ) (1 ) 214 73 Revenues 2017 Life insurance gross premiums 7,437 1,857 9,603 411 208 983 - 7 (9 ) 20,498 (546 ) 19,952 Accident and health insurance 2,115 203 32 1 83 97 - - - 2,531 (20 ) 2,511 General insurance - 148 - 216 103 - - 1 (1 ) 466 (103 ) 363 Total gross premiums 9,553 2,208 9,635 628 394 1,080 - 8 (10 ) 23,496 (670 ) 22,826 Investment income 3,368 2,172 1,517 49 37 246 4 295 (291 ) 7,396 (58 ) 7,338 Fee and commission income 1,919 326 235 43 17 63 609 - (221 ) 2,991 (189 ) 2,802 Other revenues 5 - - - 3 1 - 4 - 13 (5 ) 7 Total revenues 14,844 4,706 11,387 720 450 1,390 613 308 (522 ) 33,895 (922 ) 32,973 Inter-segment revenues - (1 ) - - - 3 222 298 Income statement - Underlying earnings LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2016 Underlying earnings before tax 1,249 534 59 55 8 21 149 (162 ) - 1,913 48 1,960 Fair value items (521 ) (228 ) (7 ) - (1 ) (9 ) - (74 ) - (840 ) (72 ) (912 ) Realized gains / (losses) on investments (13 ) 189 153 - (1 ) 8 3 - - 340 (6 ) 334 Impairment charges (72 ) (29 ) - 1 - (1 ) (5 ) (7 ) 1 (113 ) - (112 ) Impairment reversals 42 17 - - - - - - (1 ) 58 - 58 Other income / (charges) (100 ) 44 (678 ) (23 ) - (5 ) (2 ) (6 ) - (771 ) - (771 ) Run-off businesses 54 - - - - - - - - 54 - 54 Income / (loss) before tax 638 526 (474 ) 34 6 14 145 (249 ) - 641 (31 ) 610 Income tax (expense) / benefit (80 ) (109 ) 18 (15 ) (8 ) (27 ) (48 ) 65 - (203 ) 31 (172 ) Net income / (loss) 559 418 (456 ) 19 (2 ) (13 ) 97 (183 ) - 438 - 438 Inter-segment underlying earnings (194 ) (95 ) (87 ) (14 ) (1 ) 74 234 84 Revenues 2016 Life insurance gross premiums 7,363 2,015 9,888 399 191 1,121 - 6 (84 ) 20,898 (498 ) 20,400 Accident and health insurance 2,204 210 36 1 73 104 - (4 ) - 2,624 (15 ) 2,609 General insurance - 266 - 179 92 - - 5 (5 ) 536 (92 ) 444 Total gross premiums 9,567 2,491 9,924 578 355 1,225 - 7 (89 ) 24,058 (606 ) 23,453 Investment income 3,717 2,135 1,661 45 45 232 3 406 (403 ) 7,841 (54 ) 7,788 Fee and commission income 1,651 350 95 36 14 61 632 - (242 ) 2,596 (188 ) 2,408 Other revenues 4 - - - 2 - 1 3 - 11 (4 ) 7 Total revenues 14,940 4,976 11,680 659 416 1,517 636 416 (734 ) 34,507 (852 ) 33,655 Inter-segment revenues - 3 - - - 79 243 409 Income statement - Underlying earnings LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2015 Underlying earnings before tax 1,278 537 (27 ) 37 12 20 170 (163 ) 2 1,867 34 1,901 Fair value items (691 ) 126 (25 ) - - 7 - (68 ) - (651 ) (59 ) (710 ) Realized gains / (losses) on investments (74 ) 306 103 2 - 7 3 - - 346 (8 ) 338 Impairment charges (43 ) (25 ) - (2 ) - - - - - (70 ) (21 ) (91 ) Impairment reversals 114 5 - - - - - - - 119 - 119 Other income / (charges) (913 ) 27 (1,247 ) (2 ) 17 (61 ) (1 ) - - (2,180 ) 21 (2,159 ) Run-off businesses 88 - - - - - - - - 88 - 88 Income / (loss) before tax (241 ) 977 (1,196 ) 35 29 (27 ) 172 (230 ) 2 (482 ) (33 ) (514 ) Income tax (expense) / benefit 6 (223 ) 268 (11 ) (7 ) (3 ) (50 ) 71 - 51 33 83 Net income / (loss) (235 ) 753 (928 ) 24 22 (30 ) 121 (159 ) 2 (431 ) - (431 ) Inter-segment underlying earnings (220 ) (55 ) (63 ) (14 ) - 77 264 10 Revenues 2015 Life insurance gross premiums 7,046 2,240 8,465 477 174 1,713 - 4 (106 ) 20,013 (431 ) 19,583 Accident and health insurance 2,266 234 47 1 64 105 - 6 (6 ) 2,717 (14 ) 2,703 General insurance - 473 - 164 80 - - 2 - 720 (80 ) 640 Total gross premiums 9,312 2,947 8,512 642 317 1,819 - 13 (112 ) 23,450 (524 ) 22,925 Investment income 3,680 2,277 2,331 45 41 194 7 392 (391 ) 8,576 (51 ) 8,525 Fee and commission income 1,704 351 98 39 13 62 650 - (284 ) 2,633 (195 ) 2,438 Other revenues 9 - - - 2 - - 7 - 19 (5 ) 14 Total revenues 14,705 5,575 10,941 726 373 2,076 657 412 (787 ) 34,677 (775 ) 33,902 Inter-segment revenues 24 2 - - - 101 261 399
Summary of Reconciliation from Underlying Earnings Before Tax to Income Before Tax	The reconciliation from underlying earnings before tax to income before tax, being the most comparable IFRS measure, is presented in the table below. For those items that cannot be directly reconciled to the respective notes, the explanation is provided below the table. Note 2017 2016 2015 Underlying earnings before tax 2,103 1,913 1,867 Elimination of share in earnings of joint ventures and associates 61 48 34 Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives 10 (437 ) (783 ) (571 ) Realized gains and losses on financial investments 10 431 327 349 Gains and (losses) on investments in real estate 10 193 70 145 Net fair value change of derivatives 10 (134 ) (277 ) (29 ) Net foreign currency gains and (losses) 10 5 30 (5 ) Realized gains and (losses) on repurchased debt 10 1 1 2 Other income 11 540 66 83 Change in valuation of liabilities for insurance contracts 12 (254 ) (144 ) (602 ) Change in valuation of liabilities for investment contracts 12 (19 ) (18 ) - Policyholder claims and benefits - Other 12 34 45 17 Commissions and expenses 14 256 75 130 Impairment (charges) reversals 15 (40 ) (97 ) (1,250 ) Other charges 17 (235 ) (700 ) (774 ) Run-off businesses 5 30 54 88 Income / (loss) before tax 2,534 610 (514 )
Summary of Other Selected Income Statement Items	Other selected income statement items LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Amortization of deferred expenses, VOBA and future servicing rights 336 27 134 55 - 33 - - - 586 Depreciation 44 16 28 8 3 1 3 2 - 105 Impairment charges / (reversals) on financial assets, excluding receivables 19 17 - 2 - - - 3 - 42 Impairment charges / (reversals) on non-financial assets and receivables (2 ) 3 - - - - - - - - 2016 Amortization of deferred expenses, VOBA and future servicing rights 761 32 177 59 - 32 - - 2 1,065 Depreciation 38 17 21 9 3 1 - 2 - 89 Impairment charges / (reversals) on financial assets, excluding receivables 35 12 - (1 ) - 1 5 7 - 59 Impairment charges / (reversals) on non-financial assets and receivables 7 (2 ) 31 (1 ) - - - - - 36 2015 Amortization of deferred expenses, VOBA and future servicing rights 731 39 377 80 - 34 - - - 1,261 Depreciation 31 17 23 9 2 1 - - - 84 Impairment charges / (reversals) on financial assets, excluding receivables (68 ) 20 - 2 21 - - - - (24 ) Impairment charges / (reversals) on non-financial assets and receivables - 2 1,274 - - - - - - 1,275
Summary of Number of Employees	Number of employees LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Number of employees - headcount 10,951 3,089 3,435 2,337 610 6,025 1,500 371 28,318 Of which Aegon’s share of employees in joint ventures and associates 549 - - - 83 5,702 163 - 6,497 2016 Number of employees - headcount 11,943 4,464 2,673 2,317 600 5,579 1,474 330 29,380 Of which Aegon’s share of employees in joint ventures and associates 561 - - - 41 5,186 156 - 5,944 2015 Number of employees - headcount 12,701 4,503 2,478 2,470 534 7,163 1,382 299 31,530 Of which Aegon’s share of employees in joint ventures and associates 545 - - - 33 6,780 141 - 7,499
Summary of Assets and Liabilities Per Segment	Summarized assets and liabilities per segment LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Assets Cash and Cash equivalents 548 8,382 317 67 116 71 141 1,125 - 10,768 Assets held for sale - - 5,249 - - - - - - 5,249 Investments 73,469 53,975 2,011 1,055 720 5,326 157 91 - 136,804 Investments for account of policyholders 102,964 26,697 62,961 1,343 105 - - - (6 ) 194,063 Investments in joint ventures 6 1,008 - - 480 118 99 1 - 1,712 Investments in associates 77 74 7 6 - 14 122 8 - 308 Deferred expenses 8,552 76 945 70 1 490 - - - 10,135 Other assets 26,628 6,763 1,840 245 72 1,786 101 28,427 (28,979 ) 36,883 Total assets 212,245 96,975 73,331 2,787 1,494 7,805 620 29,651 (28,985 ) 395,923 Liabilities Insurance contracts 68,556 34,379 1,451 624 703 6,696 - 24 (1,615 ) 110,818 Insurance contracts for account of policyholders 72,501 25,587 22,862 1,109 108 - - - - 122,168 Investment contracts 6,824 9,787 278 52 - 2 - - - 16,943 Investment contracts for account of policyholders 30,463 3,255 40,482 234 - - - - - 74,434 Liabilities held for sale - - 5,003 - - - - - - 5,003 Other liabilities 19,145 17,400 1,103 365 250 133 218 5,526 (1,684 ) 42,456 Total liabilities 197,490 90,408 71,178 2,385 1,061 6,830 218 5,550 (3,299 ) 371,821 Summarized assets and liabilities per segment LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2016 Assets Cash and Cash equivalents 928 7,410 1,010 47 92 271 183 1,407 - 11,347 Assets held for sale - - 8,705 - - - - - - 8,705 Investments 93,046 53,788 2,236 983 747 5,328 90 85 - 156,303 Investments for account of policyholders 107,341 27,985 66,786 1,418 88 - - - (7 ) 203,610 Investments in joint ventures 7 877 - - 495 134 99 - - 1,614 Investments in associates 95 21 8 2 - 21 125 (1 ) - 270 Deferred expenses 9,351 84 1,084 71 1 832 - - - 11,423 Other assets 20,725 7,766 1,920 174 77 2,018 109 29,308 (29,946 ) 32,152 Total assets 231,493 97,931 81,747 2,696 1,500 8,604 607 30,800 (29,952 ) 425,425 Liabilities Insurance contracts 75,942 34,900 1,747 558 722 7,466 - 20 (1,785 ) 119,569 Insurance contracts for account of policyholders 75,328 26,275 18,112 1,126 89 - - - - 120,929 Investment contracts 10,148 9,043 355 24 - 2 - - - 19,572 Investment contracts for account of policyholders 32,013 3,160 49,309 292 - - - - - 84,774 Liabilities held for sale - - 8,816 - - - - - - 8,816 Other liabilities 21,837 19,445 1,249 318 238 (78 ) 180 6,438 (2,203 ) 47,424 Total liabilities 215,268 92,822 79,586 2,318 1,049 7,390 180 6,458 (3,988 ) 401,084
Summary of Investments	Investments LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2017 Shares 567 859 5 54 5 1 2 57 - 1,551 Debt securities 54,535 21,411 1,779 712 646 5,252 9 - - 84,344 Loans 8,831 30,189 - 275 54 6 - 13 - 39,368 Other financial assets 8,904 21 228 10 - 67 146 20 - 9,395 Investments in real estate 633 1,495 - 4 15 - - - - 2,147 Investments general account 73,469 53,975 2,011 1,055 720 5,326 157 91 - 136,804 Shares - 9,262 15,856 244 14 - - - (6 ) 25,370 Debt securities 3,116 13,370 8,125 216 9 - - - - 24,836 Unconsolidated investment funds 99,426 276 33,476 873 81 - - - - 134,132 Other financial assets 422 3,788 4,850 11 1 - - - - 9,072 Investments in real estate - - 655 - - - - - - 655 Investments for account of policyholders 102,964 26,697 62,961 1,343 105 - - - (6 ) 194,063 Investments on balance sheet 176,434 80,672 64,972 2,398 825 5,326 157 91 (6 ) 330,868 Off-balance sheet investments third parties 212,736 1,759 114,906 5,709 528 2,718 143,923 - (981 ) 481,297 Total revenue-generating investments 389,170 82,431 179,878 8,107 1,353 8,043 144,079 91 (987 ) 812,165 Investments Available-for-sale 59,459 19,841 2,007 756 651 5,299 137 20 - 88,170 Loans 8,831 30,189 - 275 54 6 - 13 - 39,368 Financial assets at fair value through profit or loss 107,511 29,147 62,310 1,363 105 21 20 57 (6 ) 200,528 Investments in real estate 633 1,495 655 4 15 - - - - 2,801 Total investments on balance sheet 176,434 80,672 64,972 2,398 825 5,326 157 91 (6 ) 330,868 Investments in joint ventures 6 1,008 - - 480 118 99 1 - 1,712 Investments in associates 77 74 7 6 - 14 122 8 - 308 Other assets 35,728 15,221 8,352 383 189 2,347 242 29,552 (28,979 ) 63,034 Consolidated total assets 212,245 96,975 73,331 2,787 1,494 7,805 620 29,651 (28,985 ) 395,923 Investments LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO 2016 Shares 793 334 84 35 4 - 2 62 - 1,314 Debt securities 70,766 23,741 2,036 633 683 5,310 - - - 103,169 Loans 10,820 28,117 - 303 45 18 - - - 39,303 Other financial assets 9,924 358 115 10 - - 88 23 - 10,519 Investments in real estate 743 1,238 - 3 15 - - - - 1,999 Investments general account 93,046 53,788 2,236 983 747 5,328 90 85 - 156,303 Shares - 9,689 15,503 295 13 - - - (7 ) 25,492 Debt securities 4,779 15,434 9,847 235 10 - - - - 30,305 Unconsolidated investment funds 102,534 - 36,600 879 64 - - - - 140,077 Other financial assets 27 2,862 4,150 9 1 - - - - 7,049 Investments in real estate - - 686 - - - - - - 686 Investments for account of policyholders 107,341 27,985 66,786 1,418 88 - - - (7 ) 203,610 Investments on balance sheet 200,387 81,774 69,021 2,401 834 5,328 90 85 (7 ) 359,914 Off-balance sheet investments third parties 240,072 952 5,333 3,154 507 2,734 130,889 - (864 ) 382,776 Total revenue-generating investments 440,458 82,725 74,354 5,556 1,342 8,061 130,979 85 (871 ) 742,690 Investments Available-for-sale 77,918 23,044 2,152 660 687 5,289 87 23 - 109,860 Loans 10,820 28,117 - 303 45 18 - - - 39,303 Financial assets at fair value through profit or loss 110,906 29,374 66,183 1,436 88 21 4 62 (7 ) 208,066 Investments in real estate 743 1,238 686 3 15 - - - - 2,685 Total investments on balance sheet 200,387 81,774 69,021 2,401 834 5,328 90 85 (7 ) 359,914 Investments in joint ventures 7 877 - - 495 134 99 - - 1,614 Investments in associates 95 21 8 2 - 21 125 (1 ) - 270 Other assets 31,003 15,260 12,718 293 170 3,122 293 30,715 (29,946 ) 63,627 Consolidated total assets 231,493 97,931 81,747 2,696 1,500 8,604 607 30,800 (29,952 ) 425,425

Premium income and premiums p82

Premium income and premiums paid to reinsurers (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Premium Income	2017 2016 2015 Life insurance 19,952 20,400 19,583 Non-life insurance 2,874 3,053 3,342 Total premium income 22,826 23,453 22,925 - Accident and health insurance 2,511 2,609 2,703 - General insurance 363 444 640 Non-life insurance premium income 2,874 3,053 3,342
Summary of Premiums Paid to Reinsurers	2017 2016 2015 Life insurance 3,214 2,932 2,694 Non-life insurance 217 244 286 Total premiums paid to reinsurers 3,431 3,176 2,979 - Accident and health insurance 205 238 268 - General insurance 13 7 18 Non-life insurance paid to reinsurers 217 244 286

Investment income (Tables)

Investment income (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Investment Income	2017 2016 2015 Interest income 6,052 6,479 7,087 Dividend income 1,164 1,180 1,306 Rental income 121 129 133 Total investment income 7,338 7,788 8,525 Investment income related to general account 5,394 5,737 6,099 Investment income for account of policyholders 1,944 2,051 2,426 Total 7,338 7,788 8,525
Summary of Investment Income	Total investment income from: 2017 2016 2015 Shares 1,164 1,180 1,306 Debt securities and money market instruments 4,248 4,838 5,332 Loans 1,686 1,752 1,760 Real estate 121 129 133 Other 119 (111 ) (6 ) Total 7,338 7,788 8,525 Investment income from financial assets held for general account: 2017 2016 2015 Available-for-sale 3,467 4,007 4,235 Loans 1,686 1,752 1,760 Financial assets designated at fair value through profit or loss 148 80 115 Real estate 71 69 61 Derivatives 31 (139 ) (96 ) Other (10 ) (32 ) 25 Total 5,394 5,737 6,099
Aegon N.V [member]
Summary of Investment Income	2017 2016 Interest income from intercompany loans 65 104 Interest income from derivatives 18 17 Total Investment Income 83 121

Fee and commission income (Tabl

Fee and commission income (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Fee and Commission Income	2017 2016 2015 Fee income from asset management 2,126 1,702 1,648 Commission income 535 562 614 Other 140 144 176 Total fee and commission income 2,802 2,408 2,438

Income from reinsurance ceded (

Income from reinsurance ceded (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Income From Reinsurance Ceded	2017 2016 2015 Recovered claims and benefits 3,669 3,477 2,784 Change in technical provisions 497 (26 ) 309 Commissions 122 236 227 Total 4,288 3,687 3,321

Results from financial transa86

Results from financial transactions (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Financial Transactions Results	Results from financial transactions comprise: 2017 2016 2015 Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives 232 (42 ) (35 ) Realized gains and (losses) on financial investments 431 327 349 Gains and (losses) on investments in real estate 193 70 145 Net fair value change of derivatives (1,159 ) 239 123 Net fair value change on for account of policyholder financial assets at fair value through profit or loss 20,524 15,121 (110 ) Net fair value change on investments in real estate for account of policyholders 38 (26 ) 67 Net foreign currency gains and (losses) (20 ) 41 (29 ) Net fair value change on borrowings and other financial liabilities 10 21 9 Realized gains and (losses) on repurchased debt 1 1 2 Total 20,250 15,753 521
Summary of Net Fair Value Changes of Financial Investments at Fair Value Through Profit or Loss, Other Than Derivatives	Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives comprise: 2017 2016 2015 Shares 25 4 - Debt securities and money market investments 127 8 (24 ) Other 80 (54 ) (12 ) Total 232 (42 ) (35 )
Summary of Realized Gains and Losses on Financial Investments	Realized gains and losses on financial investments comprise: 2017 2016 2015 Shares 165 46 44 Debt securities and money market investments 242 211 346 Loans 20 16 20 Other 3 54 (60 ) Total 431 327 349 Realized gains and losses on financial investments comprise: 2017 2016 2015 Available-for-sale investments 411 311 330 Loans 20 16 20 Total 431 327 349
Summary of Net Fair Value Change of Derivatives	Net fair value change of derivatives comprise: 2017 2016 2015 Net fair value change on economic hedges where no hedge accounting is applied 70 793 (500 ) Net fair value change on bifurcated embedded derivatives (1,231 ) (565 ) 614 Ineffective portion of hedge transactions to which hedge accounting is applied 2 12 8 Total (1,159 ) 239 123
Summary of Ineffective Portion of Hedge Transactions	The ineffective portion of hedge transactions to which hedge accounting is applied comprises: 2017 2016 2015 Fair value change on hedging instruments in a fair value hedge (12 ) (29 ) (49 ) Fair value change on hedged items in a fair value hedge 15 35 54 Ineffectiveness fair value hedge 3 7 5 Ineffectiveness cash flow hedges - 5 4 Total 2 12 8
Summary of Net Fair Value Change on for Account of Policyholder Financial Assets at Fair Value Through Profit or Loss	Net fair value change on for account of policyholder financial assets at fair value through profit or loss comprise: 2017 2016 2015 Shares 2,372 2,462 706 Debt securities and money market investments 166 1,682 (529 ) Unconsolidated investment funds 17,720 10,496 (356 ) Derivatives 94 252 69 Other 171 230 - Total 20,524 15,121 (110 )
Aegon N.V [member]
Summary of Results from Financial Transactions	2017 2016 Results from financial transactions comprise: Net fair value change of derivatives 56 (68 ) Net foreign currency gains and (losses) - (2 ) Net fair value change on borrowings and other financial liabilities - 2 Total 56 (68

Other income (Tables)

Other income (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Other Income	2017 2016 2015 Other income 540 66 83

Policyholder claims and benef88

Policyholder claims and benefits (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Policyholder Claims and Benefits	2017 2016 2015 Benefits and claims paid life 23,634 23,877 23,130 Benefits and claims paid non-life 1,903 2,052 2,128 Change in valuation of liabilities for insurance contracts 22,741 16,193 7,880 Change in valuation of liabilities for investment contracts (2,644 ) (104 ) (6,678 ) Other (34 ) (45 ) (17 ) Total 45,599 41,974 26,443

Profit sharing and rebates (Tab

Profit sharing and rebates (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Profit Sharing and Rebates	2017 2016 2015 Surplus interest bonuses 2 4 2 Profit appropriated to policyholders 21 45 29 Total 23 49 31

Commissions and expenses (Table

Commissions and expenses (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Commissions and Expenses	2017 2016 2015 Commissions 2,661 2,929 3,313 Employee expenses 2,234 2,287 2,280 Administration expenses 1,424 1,273 1,278 Deferred expenses (980 ) (1,203 ) (1,533 ) Amortization of deferred expenses 543 880 1,143 Amortization of VOBA and future servicing rights 43 184 117 Total 5,925 6,351 6,598
Summary of Employee Expenses	Employee expenses 2017 2016 2015 Salaries 1,470 1,471 1,462 Post-employment benefit costs 318 338 335 Social security charges 151 155 145 Other personnel costs 267 294 320 Shares, share appreciation rights, share options 28 28 17 Total 2,234 2,287 2,280
Summary of Shares Provided in Active Plans for Long Term Incentive and Variable Compensation Identified Saff	2007 2011 1) 2012 1) 2013 1) 2014 1) 2015 1) 2016 1) 2017 1) Total Number of shares conditionally granted 2) 18,506 4,075,460 9,195,284 5,735,046 5,306,037 5,178,633 6,809,814 6,722,418 43,041,198 Number of shares allocated 18,506 6,452,535 13,392,200 8,536,076 4,714,569 4,942,275 7,155,420 - 45,211,581 Unvested at January 1, 2016 9,253 - 6,584,783 7,458,390 4,372,405 5,178,633 - - 23,603,464 Number of shares conditionally granted 2) - - - - - - 6,809,814 - 6,809,814 Number of shares allocated 280 - - (45,557 ) 16,937 (330,501 ) - - (358,841 ) Number of shares forfeited - - 76,435 141,013 95,977 15,985 - - 329,410 Number of shares vested 9,533 - 6,508,348 3,167,260 111,521 278,510 - - 10,075,172 Unvested at December 31, 2016 - - - 4,104,560 4,181,844 4,553,637 6,809,814 - 19,649,855 Number of shares conditionally granted 2) - - - - - - - 6,722,418 6,722,418 Number of shares allocated - - - - 49,780 - 345,606 - 395,386 Number of shares forfeited - - - - 42,580 116,505 136,506 - 295,591 Number of shares vested - - - 4,104,560 1,887,728 122,638 427,485 - 6,542,411 Unvested at December 31, 2017 - - - - 2,301,316 4,314,494 6,591,429 6,722,418 19,929,657 Average share price used for grant in EUR 3) 4.727 3.126 4.917 6.739 6.106 5.128 5.246 Fair value of shares at grant date in EUR 3.915 to 2.260 to 3.900 to 5.840 to 5.159 to 3.990 to 4.898 4.040 to 4.933 1 Performance year for both Long-term incentive plans and Variable compensation Identified Staff 2 Number of shares conditionally granted based on the at target number of grants made that could increase or decrease subject to the actual performance attained 3 This value is the volume weighted average price (VWAP) of Aegon on the Euronext Amsterdam stock exchange for the period December 15 to January 15
Aegon N.V [member]
Summary of Commissions and Expenses	2017 2016 Employee expenses 80 80 Administration expenses 78 73 Cost sharing (76 ) (85 ) Total 82 68

Impairment charges _ (reversa91

Impairment charges / (reversals) (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Impairment Charges / (Reversals)	Impairment charges / (reversals) comprise: 2017 2016 2015 Impairment charges on financial assets, excluding receivables 74 117 95 Impairment reversals on financial assets, excluding receivables (32 ) (58 ) (119 ) Impairment charges and reversals on non-financial assets and receivables - 36 1,275 Total 42 95 1,251
Summary of Impairment Charges on Financial Assets, Excluding Receivables	Impairment charges on financial assets, excluding receivables, from: 2017 2016 2015 Shares 2 1 4 Debt securities and money market instruments 17 53 32 Loans 50 23 37 Investments in associates 4 7 - Investments in joint ventures - - 21 Other - 33 - Total 74 117 95
Summary of Impairment Reversals on Financial Assets, Excluding Receivables	Impairment reversals on financial assets, excluding receivables, from: 2017 2016 2015 Debt securities and money market instruments (17 ) (42 ) (109 ) Loans (13 ) (14 ) (9 ) Other (2 ) (2 ) - Total (32 ) (58 ) (119 )

Interest charges and related 92

Interest charges and related fees (Tables)	12 Months Ended
	Dec. 31, 2017
Interest charges and related fees	2017 2016 2015 Subordinated loans 34 34 33 Trust pass-through securities 9 9 9 Borrowings 229 210 240 Other 162 95 129 Total 435 347 412
Aegon N.V [member]
Interest charges and related fees	2017 2016 Subordinated borrowings 34 34 Borrowings 62 68 Other 4 4 Total 100 106

Other charges (Tables)

Other charges (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Other Charges	2017 2016 2015 Other charges 235 700 774

Income tax (Tables)

Income tax (Tables)	12 Months Ended
	Dec. 31, 2017
Components of Income Tax for Period (Income) / Charge	Note 2017 2016 2015 Current tax Current year 220 33 111 Adjustments to prior years 47 (46 ) (70 ) 267 (13 ) 42 Deferred tax 43 Origination / (reversal) of temporary differences 397 102 (169 ) Changes in tax rates / bases (550 ) 93 (22 ) Changes in deferred tax assets as a result of recognition / write off of previously not recognized / recognized tax losses, tax credits and deductible temporary differences (45 ) (54 ) (8 ) Non-recognition of deferred tax assets 41 33 22 Adjustments to prior years (45 ) 12 53 (201 ) 185 (125 ) Income tax for the period (income) / charge 65 172 (83 )
Summary of Reconciliation Between Standard and Effective Income Tax	Adjustments to prior years include shifts between current and deferred tax. Reconciliation between standard and effective income tax: 2017 2016 2015 Income before tax 2,534 610 (514 ) Income tax calculated using weighted average applicable statutory rates 745 239 (57 ) Difference due to the effects of: Non-taxable income (157 ) (126 ) 43 Non-tax deductible expenses 28 21 49 Changes in tax rate/base (550 ) 93 (22 ) Different tax rates on overseas earnings (1 ) 8 6 Tax credits (67 ) (41 ) (100 ) Other taxes 67 38 14 Adjustments to prior years 2 (34 ) (17 ) Origination and change in contingencies 9 8 3 Changes in deferred tax assets as a result of recognition / write off of previously not recognized / recognized tax losses, tax credits and deductible temporary differences (45 ) (54 ) (8 ) Non-recognition of deferred tax assets 41 33 22 Tax effect of (profit) / losses from joint ventures and associates (7 ) (7 ) (8 ) Other (1 ) (6 ) (8 ) (680 ) (67 ) (27 ) Income tax for the period (income) / charge 65 172 (83 )
Summary of Income Tax Related to Components of Other Comprehensive Income and Retained Earning	The following tables present income tax related to components of other comprehensive income and retained earnings. 2017 2016 2015 Items that will not be reclassified to profit and loss: Changes in revaluation reserve real estate held for own use 9 (3 ) (2 ) Remeasurements of defined benefit plans (175 ) 89 (75 ) (166 ) 86 (77 ) Items that may be reclassified subsequently to profit and loss: Gains / losses on revaluation of available-for-sale investments (134 ) (187 ) 810 Gains / losses transferred to the income statement on disposal and impairment of available-for-sale investments 441 427 124 Changes in cash flow hedging reserve 567 24 (98 ) Movement in foreign currency translation and net foreign investment hedging reserve 76 (39 ) (52 ) 951 225 783 Total income tax related to components of other comprehensive income 785 311 706 2017 2016 2015 Income tax related to equity instruments and other Income tax related to equity instruments 33 44 44 46 Other 14 (3 ) - Total income tax recognised directly in retained earnings 58 41 46
Aegon N.V [member]
Components of Income Tax for Period (Income) / Charge	2017 2016 Current Tax - Current Tax 1 25 Income tax for the period (income) / charge 1 25 Reconciliation between standard and effective tax Income before tax (43 ) (121 ) Tax on income 11 30 Differences due to the effect of: Non deductible expenses (11 ) (6 ) Total 1 25

Earnings per share (Tables)

Earnings per share (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Basic Earnings Per Share	2017 2016 2015 Net income / (loss) attributable to owners 2,469 437 (432 ) Coupons on perpetual securities (103 ) (105 ) (111 ) Coupons on non-cumulative subordinated notes (28 ) (28 ) (28 ) Net income / (loss) attributable to owners for basic earnings per share calculation 2,338 304 (571 ) Net income / (loss) attributable to common shareholders 2,321 302 (567 ) Net income / (loss) attributable to common shareholders B 16 2 (4 ) Weighted average number of common shares outstanding (in million) 2,042 2,048 2,101 Weighted average number of common shares B outstanding (in million) 575 575 584 Basic earnings per common share (EUR per share) 1.14 0.15 (0.27 ) Basic earnings per common share B (EUR per share) 0.03 - (0.01 )

Cash and cash equivalents (Tabl

Cash and cash equivalents (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Detailed Information about Cash and Cash Equivalents	2017 2016 2015 Cash at bank and in hand 3,720 3,727 2,199 Short-term deposits 2,544 3,666 3,614 Money market investments 4,496 3,939 3,318 Short-term collateral 7 16 463 At December 31 10,768 11,347 9,594
Disclosure of Cash and Cash Equivalents	For the purposes of the cash flow statement, cash and cash equivalents comprise the following: Note 2017 2016 2015 Cash and cash equivalents 10,768 11,347 9,594 Cash classified as Assets held for sale 22 260 - - Bank overdrafts 44 (2 ) (1 ) - Bank overdrafts classified as Liabilities held for sale (1 ) - - Net cash and cash equivalents 11,026 11,346 9,593
Disclosure of Detailed Information of Cash Flow Statement	Summary cash flow statement 2017 2016 2015 Net cash flows from operating activities 553 3,319 914 Net cash flows from investing activities (1,196 ) (1,078 ) 615 Net cash flows from financing activities 519 (465 ) (2,785 ) Net increase in cash and cash equivalents (125 ) 1,776 (1,257 )
Summary of Reconciliation of Liabilities Arising from Financing Activities	The table below shows the reconciliation between the net cash flows from financing activities and the liabilities as included in the consolidated statement of financial position. Cash flows Non-cash changes Reconciliation of debt from financing activities At Addition Repayment Realized Movements Amorti- Other Net At Subordinated borrowings 767 - - - - 6 - (9 ) 764 Trust pass-through securities 156 - - - (4 ) - - (19 ) 133 Borrowings 13,153 9,170 (7,918 ) (10 ) - (1 ) 1 (760 ) 13,635 Assets held to hedge Trust pass-through securities 22 - - (4 ) - - - (2 ) 15

Assets and liabilities held f97

Assets and liabilities held for sale (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Assets and Liabilities Classified as Held for Sale	The table below presents the major types of assets and liabilities of Aegon Ireland plc. included in assets and liabilities classified as held for sale on the consolidated statement of financial position. Amounts in EUR million 2017 Assets Cash and cash equivalents 260 Investments 139 Investments for account of policyholders 4,775 Derivatives 57 Deferred tax assets 5 Deferred expenses 6 Other assets and receivables 7 Total assets 5,249 Liabilities Insurance contracts for account of policyholders 1,346 Investment contracts for account of policyholders 3,518 Derivatives 74 Deferred gains 43 Other liabilities 18 Accruals 3 Total liabilities 5,003

Fair value (Tables)

Fair value (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Fair Value of Financial Assets and Liabilities Measured at Fair Value	The table below provides an analysis of assets and liabilities recorded at fair value on a recurring basis by level of the fair value hierarchy: Level I Level II Level III Total 2017 Assets carried at fair value Available-for-sale Shares 51 151 288 490 Debt securities 26,338 52,415 1,447 80,200 Money market and other short-term instruments 1,664 5,026 - 6,690 Other investments at fair value - 208 583 791 28,053 57,800 2,318 88,170 Fair value through profit or loss Shares 226 232 604 1,062 Debt securities 1,964 2,175 4 4,144 Money market and other short-term instruments 17 102 - 119 Other investments at fair value 1 539 1,255 1,795 Investments for account of policyholders 1) 115,323 76,302 1,784 193,409 Derivatives 68 5,787 57 5,912 Investments in real estate - - 2,147 2,147 Investments in real estate for policyholders - - 655 655 117,599 85,137 6,506 209,241 Revalued amounts Real estate held for own use - - 307 307 - - 307 307 Total assets at fair value 145,652 142,937 9,130 297,718 Liabilities carried at fair value Investment contracts for account of policyholders 2) - 36,950 219 37,169 Borrowings 3) - 536 - 536 Derivatives 34 5,251 1,845 7,130 Total liabilities at fair value 34 42,738 2,064 44,835 1 The investments for account of policyholders included in the table above only include investments carried at fair value through profit or loss. 2 The investment contracts for account of policyholders included in the table above represents only those investment contracts carried at fair value. 3 Total borrowings on the statement of financial position contain borrowings carried at amortized cost that are not included in the above schedule. Note that the investment contracts for account of policyholders previously reported as Level I have been reclassified to Level II, as the value of these liabilities is directly derived from the fair value of the linked investments for account of policyholders. The comparative numbers have been adjusted accordingly. These reclassifications had no effect on net income, shareholders’ equity or earnings per share. Level I Level II Level III Total 2016 Assets carried at fair value Available-for-sale Shares 119 312 393 824 Debt securities 29,386 69,702 1,966 101,054 Money market and other short-term instruments - 6,776 - 6,776 Other investments at fair value - 453 754 1,206 29,504 77,243 3,112 109,860 Fair value through profit or loss Shares 288 152 50 490 Debt securities 27 2,082 6 2,115 Money market and other short-term instruments - 317 - 317 Other investments at fair value 1 961 1,257 2,219 Investments for account of policyholders 1) 125,997 75,202 1,726 202,924 Derivatives 41 8,169 108 8,318 Investments in real estate - - 1,999 1,999 Investments in real estate for policyholders - - 686 686 126,355 86,883 5,831 219,069 Revalued amounts Real estate held for own use - - 332 332 - - 332 332 Total assets at fair value 155,860 164,126 9,275 329,261 Liabilities carried at fair value Investment contracts for account of policyholders 2) - 42,627 176 42,803 Borrowings 3) - 610 - 610 Derivatives 64 6,347 2,467 8,878 Total liabilities at fair value 64 49,584 2,643 52,290 1 The investments for account of policyholders included in the table above only include investments carried at fair value through profit or loss. 2 The investment contracts for account of policyholders included in the table above represents only those investment contracts carried at fair value. 3 Total borrowings on the statement of financial position contain borrowings carried at amortized cost that are not included in the above schedule.
Schedule of Transfers between Level 1 and Level II for Financial Assets and Liabilities Recorded at Fair Value on Recurring Basis	The table below shows transfers between Level I and Level II for financial assets and financial liabilities recorded at fair value on a recurring basis. Total 2017 Total 2016 Transfers Level I Transfers Level II Transfers Level I Transfers Level II Assets carried at fair value Available-for-sale Shares 1 1 - - Debt securities 12 - 5 69 Money markets and other short-term instruments - 1,664 - - 13 1,666 5 69 Fair value through profit or loss Shares 124 19 - - Investments for account of policyholders 12 30 3 (1 ) 136 49 3 (1 ) Total assets at fair value 149 1,714 8 68 Investment contracts for account of policyholders 1 - - - Total liabilities carried at fair value 1 - - -
Disclosures of Changes in Level 3 Assets	The following table summarizes the change of all assets and liabilities measured at estimated fair value on a recurring basis using significant unobservable inputs (Level III), including realized and unrealized gains (losses) of all assets and liabilities and unrealized gains (losses) of all assets and liabilities still held at the end of the respective period. Assets carried at fair value LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO Available-for-sale Shares 393 54 (46 ) 68 (112 ) (35 ) (34 ) - - - - 288 - Debt securities 1,966 39 (2 ) 678 (149 ) (890 ) (186 ) - 203 (211 ) - 1,447 - Other investments at fair value 754 (112 ) (109 ) 194 (48 ) (9 ) (87 ) - 1 - - 583 - 3,112 (19 ) (158 ) 939 (309 ) (935 ) (307 ) - 205 (211 ) - 2,318 - Fair value through profit or loss Shares 50 (11 ) - 583 (18 ) - - - - - - 604 (11 ) Debt securities 6 - - - - - (1 ) - - - - 4 1 Other investments at fair value 1,257 23 - 378 (350 ) - (162 ) - 341 (233 ) - 1,255 20 Investments for account of policyholders 1,726 11 - 671 (622 ) - (27 ) - 32 (8 ) - 1,784 30 Derivatives 108 (33 ) - - - - (2 ) (16 ) - - - 57 (21 ) Investments in real estate 1,999 193 - 246 (202 ) - (89 ) - - - - 2,147 77 Investments in real estate for policyholders 686 38 - 10 (53 ) - (26 ) - - - - 655 38 5,831 220 - 1,889 (1,245 ) - (306 ) (16 ) 374 (241 ) - 6,506 134 Revalued amounts Real estate held for own use 332 (2 ) 8 (3 ) (4 ) - (24 ) - - - - 307 (3 ) 332 (2 ) 8 (3 ) (4 ) - (24 ) - - - - 307 (3 ) Total assets at fair value 9,275 199 (150 ) 2,826 (1,558 ) (935 ) (638 ) (16 ) 578 (452 ) - 9,130 131 Liabilities carried at fair value Investment contracts for account of policyholders 176 7 - 60 (21 ) - (12 ) - 10 (2 ) - 219 (2 ) Derivatives 2,467 (828 ) - - 300 - (75 ) 10 - - (30 ) 1,845 (745 ) 2,643 (821 ) - 60 279 - (87 ) 10 10 (2 ) (30 ) 2,064 (747 ) 1 Includes impairments and movements related to fair value hedges. Gains and losses are recorded in the line item Results from financial transactions of the income statement. 2 Total gains and losses are recorded in line items: Gains / (losses) on revaluation of available-for-sale investments, (Gains) / losses transferred to the income statement on disposal and impairment of available-for-sale investments and Changes in revaluation reserve real estate held for own use of the statement of other comprehensive income. 3 Total gains / (losses) for the period during which the financial instrument was in Level III. Assets carried at fair value LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO Available-for-sale Shares 293 27 (7 ) 161 (92 ) (1 ) 11 - - - - 393 - Debt securities 4,144 1 92 443 (262 ) (287 ) 39 - 651 (2,854 ) - 1,966 - Other investments at fair value 928 (177 ) 20 240 (133 ) (141 ) 18 - - (1 ) - 754 - 5,365 (150 ) 105 845 (487 ) (429 ) 68 - 651 (2,856 ) - 3,112 - Fair value through profit or loss Shares - 3 - 48 - - - - - - - 50 3 Debt securities 6 (1 ) - - - - - - - - - 6 - Other investments at fair value 1,265 (44 ) - 178 (277 ) - 35 - 419 (321 ) - 1,257 (42 ) Investments for account of policyholders 1,745 22 - 469 (395 ) - (35 ) - 8 (88 ) - 1,726 23 Derivatives 222 (285 ) - 75 108 - (12 ) - - - - 108 (287 ) Investments in real estate 1,990 70 - 120 (215 ) - 19 15 - - - 1,999 118 Investments in real estate for policyholders 1,022 (26 ) - 81 (260 ) - (131 ) - - - - 686 22 6,250 (261 ) - 971 (1,039 ) - (123 ) 15 427 (409 ) - 5,831 (163 ) Revalued amounts Real estate held for own use 338 (9 ) 8 5 - - 6 (15 ) - - - 332 5 338 (9 ) 8 5 - - 6 (15 ) - - - 332 5 Total assets at fair value 11,954 (420 ) 113 1,821 (1,527 ) (429 ) (49 ) - 1,077 (3,264 ) - 9,275 (159 ) Liabilities carried at fair value Investment contracts for account of policyholders 156 (14 ) - 45 (12 ) - 2 - - (2 ) - 176 1 Derivatives 2,104 542 - - (207 ) - 28 - - - - 2,467 562 2,260 528 - 45 (219 ) - 31 - - (2 ) - 2,643 563 1 Includes impairments and movements related to fair value hedges. Gains and losses are recorded in the line item Results from financial transactions of the income statement. 2 Total gains and losses are recorded in line items: Gains / (losses) on revaluation of available-for-sale investments, (Gains) / losses transferred to the income statement on disposal and impairment of available-for-sale investments and Changes in revaluation reserve real estate held for own use of the statement of other comprehensive income. 3 Total gains / (losses) for the period during which the financial instrument was in Level III.
Information about Significant Unobservable Inputs	The table below presents information about the significant unobservable inputs used for recurring fair value measurements for certain Level III financial instruments. Assets carried at fair Valuation technique 1) Significant 2) December 31, Range December 31, Range Available-for-sale Shares Net asset value 3) n.a. 231 n.a. 262 n.a. Other n.a. 57 n.a. 131 n.a. 288 393 Debt securities Broker quote n.a. 1,034 n.a. 1,389 n.a. 1.04% - 2.72% 1.30% - 3.37% Discounted cash flow Credit spread 116 (2.64%) 221 (3.08%) Other n.a. 297 n.a. 355 n.a. 1,447 1,966 Other investments at fair value Tax credit investments Discounted cash flow Discount rate 528 5.8% 676 5.6% Investment funds Net asset value 3) n.a. 31 n.a. 45 n.a. Other Other n.a. 24 n.a. 32 n.a. 583 754 At December 31 2,318 3,112 Fair value through profit or loss Shares Other n.a. 604 n.a. 50 n.a. Debt securities Other n.a. 4 n.a. 6 n.a. 609 56 Other investments at fair value Investment funds Net asset value 3) n.a. 1,246 n.a. 1,252 n.a. Other Other n.a. 9 n.a. 5 n.a. 1,255 1,257 Derivatives Longevity swap Discounted cash flow Mortality 24 n.a. 27 n.a. Longevity swap -/- 0.21% - Discounted cash flow Risk free rate - - 73 1.67% (1.01%) Other Other n.a. 30 n.a. 4 n.a. 54 104 Real estate Investments in real estate Direct capitalization Capitalization 3.0% - 10.0% 4.8% - 10.5% technique rate 496 (5.9%) 568 (6.3%) Appraisal value n.a. 1,495 n.a. 1,237 n.a. Other n.a. 155 n.a. 193 n.a. 2,147 1,999 At December 31 4,065 3,415 Revalued amounts Real estate held for own use Direct capitalization Capitalization 6.0% - 10.0% 6.5% - 9.5% technique rate 157 (7.9%) 178 (7.9%) Appraisal value n.a. 115 n.a. 120 n.a. Other n.a. 35 n.a. 34 n.a. At December 31 307 332 Total assets at fair value 4) 6,689 6,859 Liabilities carried at fair value Derivatives Embedded derivatives in Own credit 0.2% - 0.3% 0.4% - 0.5% insurance contracts Discounted cash flow spread 1,831 (0.22%) 2,083 (0.4%) Longevity swap Discounted cash flow Mortality 10 n.a. - n.a. Other Other n.a. 3 n.a. 384 n.a. Total liabilities at fair value 1,845 2,467 1 Other in the table above (column Valuation technique) includes investments for which the fair value is uncorroborated and no broker quote is received. 2 Not applicable (n.a.) has been included when no significant unobservable assumption has been identified. 3 Net asset value is considered the best approximation to the fair value of these financial instruments. 4 Investments for account of policyholders are excluded from the table above and from the disclosure regarding reasonably possible alternative assumptions. Policyholder assets, and their returns, belong to policyholders and do not impact Aegon’s net income or equity. The effect on total assets is offset by the effect on total liabilities. Derivatives exclude derivatives for account of policyholders amounting to EUR 3 million (2016: EUR 4).
Effect of Changes in Significant Unobservable Assumptions to Reasonably Possible Alternatives	The table below presents the impact on a fair value measurement of a change in the own credit spread by 20 basis points included in the discount rate. December 31, Effect of reasonably December 31, Effect of reasonably Increase Decrease Increase Decrease Financial liabilities carried at fair value Embedded derivatives in insurance contracts 1,831 125 (120 ) 2,083 205 (194 )
Carrying Values and Estimated Fair Values of Assets and Liabilities	The following table presents the carrying values and estimated fair values of assets and liabilities, excluding assets and liabilities which are carried at fair value on a recurring basis. 2017 Carrying amount Estimated fair value hierarchy Total estimated fair Level I Level II Level III Assets Mortgage loans - held at amortized cost 33,562 - - 38,076 38,076 Private loans - held at amortized cost 3,642 - 64 4,117 4,181 Other loans - held at amortized cost 2,164 6 1,991 166 2,164 Liabilities Subordinated borrowings - held at amortized cost 764 791 162 - 953 Trust pass-through securities - held at amortized cost 133 - 137 - 137 Borrowings – held at amortized cost 13,099 2,116 28 11,355 13,499 Investment contracts - held at amortized cost 16,665 - 9,676 7,356 17,031 2016 Carrying amount Estimated fair value hierarchy Total estimated fair Level I Level II Level III Assets Mortgage loans - held at amortized cost 33,696 - - 38,498 38,499 Private loans - held at amortized cost 3,166 - 52 3,516 3,569 Other loans - held at amortized cost 2,441 - 2,292 148 2,441 Liabilities Subordinated borrowings - held at amortized cost 767 703 140 - 844 Trust pass-through securities - held at amortized cost 156 - 141 - 141 Borrowings – held at amortized cost 12,543 2,138 31 10,766 12,935 Investment contracts - held at amortized cost 19,217 - 8,951 10,797 19,748
Carrying Values and Estimated Fair Values of Assets and Liabilities	The table that follows summarizes the carrying amounts of financial assets and financial liabilities that are classified as at fair value through profit or loss, with appropriate distinction between those financial assets and financial liabilities held for trading and those that, upon initial recognition, were designated as at fair value through profit or loss. 2017 2016 Trading Designated Trading Designated Investments for general account 78 7,042 66 5,076 Investments for account of policyholders - 193,409 - 202,924 Derivatives with positive values not designated as hedges 5,430 - 6,935 - Total financial assets at fair value through profit or loss 5,508 200,451 7,001 208,001 Investment contracts for account of policyholders - 37,169 - 42,803 Derivatives with negative values not designated as hedges 6,792 - 8,386 - Borrowings - 536 - 610 Total financial liabilities at fair value through profit or loss 6,792 37,705 8,386 43,413
Summary of Gains and losses recognized in the income statement on financial assets and financial liabilities	Gains and losses recognized in the income statement on financial assets and financial liabilities classified as at fair value through profit or loss can be summarized as follows: 2017 2016 Trading Designated Trading Designated Net gains and (losses) 13,924 5,679 6,509 8,815
Assets and liabilities classified as held for sale [member]
Summary of Fair Value of Financial Assets and Liabilities Measured at Fair Value	Level I Level II Level III Total 2017 Assets carried at fair value Fair value through profit or loss Shares 139 - - 139 Investments for account of policyholders 1,699 3,076 - 4,775 Derivatives - 57 - 57 Total assets at fair value 1,837 3,133 - 4,971 Liabilities carried at fair value Investment contracts for account of policyholders - 3,518 - 3,518 Derivatives - 41 33 74 Total liabilities at fair value - 3,559 33 3,592

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Investments for General Accounts Comprise Financial Assets Excluding Derivatives And Investments in Real Estate	Note 2017 2016 Available-for-sale (AFS) 88,170 109,860 Loans 39,368 39,303 Financial assets at fair value through profit or loss (FVTPL) 7,119 5,142 Total financial assets, excluding derivatives 23.1 134,658 154,304 Investments in real estate 23.2 2,147 1,999 Total investments for general account 136,804 156,303
Summary of Financial Assets Excluding Derivatives	Financial assets, excluding derivatives AFS FVTPL Loans Total Fair value 2017 Shares 490 1,062 - 1,551 1,551 Debt securities 80,200 4,144 - 84,344 84,344 Money market and other short-term investments 6,690 119 - 6,809 6,809 Mortgage loans - - 33,562 33,562 38,076 Private loans - - 3,642 3,642 4,181 Deposits with financial institutions - - 139 139 139 Policy loans - - 1,897 1,897 1,897 Other 791 1,795 127 2,713 2,713 At December 31, 2017 88,170 7,119 39,368 134,658 139,711 2016 Shares 824 490 - 1,314 1,314 Debt securities 101,054 2,115 - 103,169 103,169 Money market and other short-term investments 6,776 317 - 7,093 7,093 Mortgage loans - - 33,696 33,696 38,499 Private loans - - 3,166 3,166 3,569 Deposits with financial institutions - - 129 129 129 Policy loans - - 2,207 2,207 2,207 Other 1,206 2,219 104 3,529 3,529 At December 31, 2016 109,860 5,142 39,303 154,304 159,510
Summary of Movement on Loan Allowance Account	Movement on the loan allowance account during the year were as follows: 2017 2016 At January 1 (137 ) (142 ) Addition charged to income statement (50 ) (23 ) Reversal to income statement 13 14 Amounts written off 10 17 Net exchange differences 3 - Other (4 ) (3 ) At December 31 (165 ) (137 )
Summary of Investments in Real Estate	Investments in real estate 2017 2016 At January 1 1,999 1,990 Additions 239 89 Subsequent expenditure capitalized 10 12 Transfers from other headings 1 34 Disposals (202 ) (215 ) Fair value gains / (losses) 193 70 Net exchange differences (89 ) 19 Other (4 ) (1 ) At December 31 2,147 1,999

Investments for account of p100

Investments for account of policyholders (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Investments for Account of Policyholders	Note 2017 2016 Shares 25,370 25,492 Debt securities 24,836 30,305 Money market and other short-term investments 2,340 1,231 Deposits with financial institutions 2,946 2,951 Unconsolidated investment funds 134,132 140,077 Other 3,786 2,868 Total investments for account of policyholders at fair value through profit or loss, excluding derivatives 193,409 202,924 Investments in real estate 24.1 655 686 Total investments for account of policyholders 194,063 203,610
Summary of Investments in Real Estate for Account of Policyholders	2017 2016 At January 1 686 1,022 Additions 7 74 Subsequent expenditure capitalized 3 7 Disposals (53 ) (260 ) Fair value gains / (losses) 38 (26 ) Net exchange differences (26 ) (131 ) At December 31 655 686

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2017
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Summary of Derivative Asset and Liability	Derivative asset Derivative liability 2017 2016 2017 2016 Derivatives for general account Derivatives not designated in a hedge 5,081 6,533 6,716 8,280 Derivatives designated as fair value hedges 32 45 48 119 Derivatives designated as cash flow hedges 393 1,234 233 250 Derivatives designated as Net foreign investment hedges 57 104 57 123 5,563 7,916 7,053 8,771 Derivatives for account of policyholders Derivatives not designated in a hedge 349 402 76 107 349 402 76 107 Total derivatives 1) 5,912 8,318 7,130 8,878 1 Refer to note 47 Fair value for a summary of all financial assets and financial liabilities at fair value through profit or loss.
Derivatives Not Designated In Hedge - General Account	Derivatives not designated in a hedge - general account Derivative asset Derivative liability Derivatives not designated in a hedge – general account 2017 2016 2017 2016 Derivatives held as an economic hedge 4,933 6,398 4,774 6,122 Bifurcated embedded derivatives 13 12 1,937 2,192 Other 134 124 5 (35 ) Total 5,081 6,533 6,716 8,280
Credit Default Swaps Positions Outstanding at End of Year	Aegon has entered into free-standing credit derivative transactions. The positions outstanding at the end of the year were: 2017 2016 Notional Fair value Notional Fair value CDSs 3,606 92 4,466 51
Credit Derivative Disclosure By Quality	2017 2016 Credit derivative disclosure by quality Notional Fair value Notional Fair value AAA 4 - 1 - AA 83 2 483 2 A 750 15 763 7 BBB 2,392 68 2,849 41 BB 357 8 243 - B or lower 21 - 128 3 Total 3,606 92 4,466 51
Summary of Cash Flows are Expected to Occur	The periods when the cash flows are expected to occur are as follows: < 1 year 1 – 5 years 5 – 10 years > 10 years 2017 Total Cash inflows 78 315 312 5,648 6,352 Cash outflows - 1 4 - 5 Net cash flows 78 314 309 5,648 6,348 < 1 year 1 – 5 years 5 – 10 years > 10 years 2016 Total Cash inflows 319 1,326 888 8,338 10,870 Cash outflows - 1 4 - 5 Net cash flows 318 1,325 883 8,338 10,864

Investments in joint ventures (

Investments in joint ventures (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Schedule of Investments in Joint Ventures	2017 2016 At January 1 1,614 1,561 Additions 81 92 Share in net income 161 137 Share in changes in joint ventures equity (note 32.6) (15 ) 9 Dividend (118 ) (196 ) Net exchange difference (17 ) (4 ) Other 7 15 At December 31 1,712 1,614
Summary of Financial Information of Joint Ventures	The summarized financial information presented in the following table presents the joint ventures on a 100% basis. Aegon considers its investment in AMVEST Vastgoed B.V. (AMVEST) a material joint venture and is therefore presented separately. AMVEST Other Joint ventures 2017 2016 2017 2016 Summarized statement of financial position Cash and cash equivalents 109 135 342 373 Other current assets 166 237 721 737 Total current assets 276 372 1,063 1,110 Non-current assets 3,173 2,519 6,521 6,375 Total assets 3,449 2,891 7,584 7,485 Current financial liabilities excluding trade payables and other provisions - - 30 60 Other current liabilities 133 149 503 403 Total current liabilities 133 149 533 464 Non-current financial liabilities excluding trade payables and other provisions 643 476 220 292 Other non-current liabilities - - 5,871 5,721 Total non-current financial liabilities 643 476 6,091 6,013 Total liabilities 776 625 6,624 6,477 Net assets 2,673 2,266 960 1,009 Summarized statement of comprehensive income Revenue 91 86 1,420 1,248 Results from financial transactions 275 205 (1 ) 1 Depreciation and amortization - - (20 ) (12 ) Interest income - - 186 48 Interest expense (5 ) (7 ) (3 ) (3 ) Profit or loss 357 275 160 122 Income tax (expense) or income (1 ) (10 ) (74 ) (47 ) Post-tax profit or (loss) 357 266 86 75 Other comprehensive income - 7 (32 ) 13 Total comprehensive income 357 273 54 89 Dividends received 49 95 69 101
Summary of Overview of Summarized Financial Information to Carrying Amount of Joint Ventures	An overview of the summarized financial information of the carrying amount of the joint ventures is as follows: AMVEST Other Joint ventures 2017 2016 2017 2016 Net assets of joint venture as presented above 2,673 2,266 960 1,009 Net assets of joint venture excluding goodwill 2,673 2,266 587 626 Group share of net assets of joint venture, excluding goodwill 1,008 877 312 338 Goodwill on acquisition - - 373 383 Carrying amount 1,008 877 685 721
Summary of Reconciliation of Summarized Financial Information to Carrying Amount of Joint Ventures	The following table includes the summarized financial information of the joint ventures based on the Group’s relative holding. AMVEST Other Joint ventures 2017 2016 2017 2016 Post-tax profit or loss 126 106 35 28 Other comprehensive income - 2 (14 ) 7 Total comprehensive income 126 108 20 34

Investments in associates (Tabl

Investments in associates (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Schedule of Investments in Associates	2017 2016 At January 1 270 242 Additions 73 20 Disposals (15 ) (4 ) Share in net income 11 3 Share in changes in associate’s equity (note 32.6) (5 ) 3 Impairment losses (1 ) - Dividend (11 ) (7 ) Net exchange difference (13 ) 13 At December 31 308 270
Schedule of Financial Information of Associates	Summarized financial information of associates 2017 2016 Post-tax profit or loss 9 3 Other comprehensive income (5 ) 3 Total comprehensive income 3 7 Carrying amount 308 270

Reinsurance assets (Tables)

Reinsurance assets (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Assets Arising From Reinsurance Contracts	Assets arising from reinsurance contracts related to: 2017 2016 Life insurance general account 17,419 9,714 Life insurance for account of policyholders 2 2 Non-life insurance 1,327 1,481 Investment contracts 453 11 At December 31 19,202 11,208
Summary of Assets Arising From Reinsurance Contracts	Assets arising from reinsurance contracts related to: 2017 2016 Normal course of business 6,648 7,609 Exit of a business 12,553 3,599 At December 31 19,202 11,208

Deferred expenses (Tables)

Deferred expenses (Tables)	12 Months Ended
	Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract]
Summary of Amounts Arising From Insurance Contracts	2017 2016 DPAC for insurance contracts and investment contracts with discretionary participation features 9,688 10,882 Deferred cost of reinsurance 41 60 Deferred transaction costs for investment management services 406 481 At December 31 10,135 11,423 Current 838 1,080 Non-current 9,297 10,343
Summary of Deferred Costs Arising From Insurance Contracts	DPAC Deferred costs of Deferred At January 1, 2017 10,882 60 481 Costs deferred during the year 938 - 41 Amortization through income statement (770 ) (13 ) (29 ) Shadow accounting adjustments (216 ) - - Impairments - - (36 ) Net exchange differences (1,227 ) (7 ) (52 ) Transfers to disposal groups (6 ) - - Other 88 - - At December 31, 2017 9,688 41 406 DPAC Deferred costs of Deferred At January 1, 2016 10,457 72 467 Costs deferred during the year 1,157 - 46 Disposal of group assets (9 ) - - Amortization through income statement (837 ) (14 ) (28 ) Shadow accounting adjustments 38 - - Impairments (31 ) - - Net exchange differences 119 1 (3 ) Other (12 ) - - At December 31, 2016 10,882 60 481
Summary of Breakdown is Provided of DPAC Balances by Line of Business and Reporting Segment	In the following table a breakdown is provided of DPAC balances by line of business and reporting segment: Americas The United Central & Spain & Asia Total 2017 Life 6,351 20 162 70 1 420 7,025 Individual savings and retirement products 1,743 - - - - - 1,743 Pensions - 55 741 - - - 797 Run-off business 53 - - - - - 53 Non-life - - - - - 71 71 At December 31 8,148 76 903 70 1 490 9,688 2016 Life 6,674 25 156 71 1 740 7,668 Individual savings and retirement products 1,911 - - - - - 1,911 Pensions - 59 839 - - - 899 Run-off business 312 - - - - - 312 Non-life - - - - - 92 92 At December 31 8,898 84 996 71 1 832 10,882

Other assets and receivables (T

Other assets and receivables (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Other Assets and Receivables	Note 2017 2016 Real estate held for own use and equipment 30.1 530 572 Receivables 30.2 8,091 8,530 Accrued income 30.3 1,382 1,565 At December 31 10,002 10,667
Summary of Real Estate Held for Own Use and Equipment	Real estate held for own use and equipment Net book value General account real Equipment Total At January 1, 2016 338 237 575 At December 31, 2016 332 241 572 At December 31, 2017 307 223 530 Cost At January 1, 2017 453 593 1,046 Additions 3 68 71 Acquired through business combinations - 11 11 Capitalized subsequent expenditure 1 - 1 Disposals (34 ) (144 ) (179 ) Unrealized gains/(losses) through equity 8 - 8 Transfer to investments in real estate - - - Transfers to disposal groups - (5 ) (5 ) Net exchange differences (34 ) (40 ) (74 ) Other - 7 7 At December 31, 2017 396 488 885 Accumulated depreciation and impairment losses At January 1, 2017 121 352 474 Depreciation through income statement 8 63 71 Disposals (28 ) (131 ) (159 ) Impairment losses - - - Impairment losses reversed (1 ) - (1 ) Transfers to disposal groups - (5 ) (5 ) Net exchange differences (10 ) (20 ) (30 ) Other - 6 6 At December 31, 2017 90 265 355 Cost At January 1, 2016 442 544 986 Additions 8 58 67 Acquired through business combinations - - - Capitalized subsequent expenditure 2 - 2 Disposals (1 ) (11 ) (12 ) Unrealized gains/(losses) through equity 8 - 8 Transfer to investments in real estate (15 ) - (15 ) Transfers to disposal groups - - - Net exchange differences 8 2 10 Other - - - At December 31, 2016 453 593 1,046 Accumulated depreciation and impairment losses At January 1, 2016 104 307 411 Depreciation through income statement 9 54 63 Disposals - (9 ) (9 ) Impairment losses 7 - 7 Impairment losses reversed - - - Transfers to disposal groups - - - Net exchange differences 2 - 2 Other - - - At December 31, 2016 121 352 474
Summary of Receivables	Receivables 2017 2016 1) Loans to associates 12 2 Loans to joint ventures 13 7 Receivables from policyholders 999 1,187 Receivables from brokers and agents 400 459 Receivables from reinsurers 2,708 1,979 Cash outstanding from assets sold 46 67 Trade receivables 910 1,434 Cash collateral 1,545 1,457 Reverse repurchase agreements 230 77 Income tax receivable 85 477 Other 1,190 1,463 Provision for doubtful debts (48 ) (79 ) At December 31 8,091 8,530 Current 8,061 8,487 Non-current 30 44 1 Certain amounts within Receivables in 2016 have been reclassified to conform to the current year presentation as certain accounts were previously not mapped correctly to the line items disclosed in this note. These reclassifications are not considered material as these reclassifications had no effect on net income, shareholder’s equity and earnings per share, nor on the total of receivables of EUR 8,530 reported in 2016. The reclassifications have been made to the line items Receivables from policyholders, Receivables from brokers and agents, Receivables from reinsurers, Cash outstanding from assets sold, Trade receivables, Cash collateral and Other.
Summary of Movements in Provision for Doubtful Debts	The movements in the provision for doubtful debts during the year were as follows: 2017 2016 At January 1 (79 ) (107 ) Additions charged to earnings (6 ) (5 ) Unused amounts reversed through the income statement 4 7 Used during the year 31 26 Net exchange differences 2 - At December 31 (48 ) (79 )
Summary of Accrued Income	Accrued income 2017 2016 Accrued interest 1,357 1,543 Other 25 22 At December 31 1,382 1,565

Intangible assets (Tables)

Intangible assets (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Intangible Assets	Net book value Goodwill VOBA Future Software Other Total At January 1, 2016 299 1,472 57 61 12 1,901 At December 31, 2016 294 1,399 64 50 12 1,820 At December 31, 2017 293 1,153 99 51 36 1,633 Cost At January 1, 2017 503 7,576 327 362 109 8,876 Additions - 6 - 29 2 37 Acquisitions through business combinations 56 - 47 9 29 140 Capitalized subsequent expenditure - - - 3 - 3 Disposals (55 ) (175 ) - (98 ) - (328 ) Net exchange differences (42 ) (841 ) (15 ) (9 ) (11 ) (919 ) Transfers to disposal groups - - - (2 ) - (2 ) At December 31, 2017 462 6,565 359 294 128 7,808 Accumulated amortization, depreciation and impairment losses At January 1, 2017 209 6,177 263 311 97 7,056 Amortization through income statement - 63 7 28 6 104 Shadow accounting adjustments - 26 - - - 26 Disposals (28 ) (165 ) - (95 ) - (288 ) Impairment losses - - - 8 - 8 Net exchange differences (11 ) (689 ) (9 ) (8 ) (11 ) (728 ) Transfers to disposal groups - - - (2 ) - (2 ) At December 31, 2017 169 5,412 260 243 92 6,176 Cost At January 1, 2016 507 7,462 314 381 105 8,769 Additions - 2 - 16 3 21 Acquisitions through business combinations (8 ) - 12 - - 4 Capitalized subsequent expenditure - - - 3 - 3 Disposals - - - (3 ) - (3 ) Net exchange differences 4 112 1 (35 ) 1 83 At December 31, 2016 503 7,576 327 362 109 8,876 Accumulated amortization, depreciation and impairment losses At January 1, 2016 208 5,990 257 320 93 6,868 Amortization through income statement - 178 6 25 2 211 Shadow accounting adjustments - (89 ) - - - (89 ) Disposals - - - (3 ) - (3 ) Net exchange differences - 98 (1 ) (30 ) 2 69 At December 31, 2016 209 6,177 263 311 97 7,056
Summary of Geographically Cash-generating Units to Goodwill	A geographical summary of the cash-generating units to which the goodwill is allocated is as follows: Goodwill 2017 2016 Americas 174 198 Central & Eastern Europe 34 36 Asset Management 31 36 United Kingdom 54 - The Netherlands - 25 At December 31 293 294
Summary of Movement in VOBA	The movement in VOBA over 2017 can be summarized and compared to 2016 as follows: 2017 2016 At January 1 1,399 1,472 Additions 6 2 Disposals (11 ) - Amortization / depreciation through income statement (63 ) (178 ) Shadow accounting adjustments (26 ) 89 Net exchange differences (153 ) 14 At December 31 1,153 1,399
Summary of Geographically Lines of Business to Voba	A geographical summary of the lines of business to which the VOBA is allocated is as follows: VOBA Americas The Netherlands United Kingdom Asia Total 2017 Life 883 - - 1 884 Individual savings and retirement products 144 - - - 144 Pensions 7 17 98 - 122 Run-off businesses 4 - - - 4 Total VOBA 1,038 17 98 1 1,153 2016 Life 1,028 - - 10 1,038 Individual savings and retirement products 181 - - - 181 Pensions 10 22 118 - 149 Distribution - 8 - - 8 Run-off businesses 23 - - - 23 Total VOBA 1,242 30 118 10 1,399

Shareholders' equity (Tables)

Shareholders' equity (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Issued Share Capital and Reserves Attributable to Shareholders	Note 2017 2016 2015 Share capital – par value 32.1 322 319 328 Share premium 32.2 7,731 7,873 8,059 Total share capital 8,053 8,193 8,387 Retained earnings 9,699 7,609 8,100 Treasury shares 32.3 (325 ) (190 ) (269 ) Total retained earnings 9,374 7,419 7,832 Revaluation reserves 32.4 4,920 5,381 6,471 Remeasurement of defined benefit plans 32.5 (1,669 ) (1,820 ) (1,532 ) Other reserves 32.6 (390 ) 1,347 1,283 Total shareholders’ equity 20,288 20,520 22,441
Summary of Share Capital - Par Value	Share capital – par value 2017 2016 2015 Common shares 251 249 258 Common shares B 70 70 70 At December 31 322 319 328 Common shares 2017 2016 2015 Authorized share capital 720 720 720 Number of authorized shares (in million) 6,000 6,000 6,000 Par value in cents per share 12 12 12 Common shares B 2017 2016 2015 Authorized share capital 360 360 360 Number of authorized shares (in million) 3,000 3,000 3,000 Par value in cents per share 12 12 12 Common shares Common shares B Number of shares Number of shares (thousands) Total amount (thousands) Total amount At January 1, 2015 2,145,948 258 581,326 70 Shares issued - - 3,696 - Dividend 1,089 - - - At December 31, 2015 2,147,037 258 585,022 70 Dividend 10,629 1 - - Shares withdrawn (83,117 ) (10 ) - - At December 31, 2016 2,074,549 249 585,022 70 Dividend 21,099 3 - - At December 31, 2017 2,095,648 251 585,022 70 Weighted average number of Weighted average number of 2015 2,146,261 583,608 2016 2,129,074 585,022 2017 2,080,792 585,022
Summary of Share Premium	2017 2016 2015 At January 1 7,873 8,059 8,270 Share dividend (142 ) (186 ) (211 ) At December 31 7,731 7,873 8,059 Share premium relating to: - Common shares 6,078 6,220 6,406 - Common shares B 1,653 1,653 1,653 Total share premium 7,731 7,873 8,059
Summary of Movement of Number of Treasury Common Shares	Movements in the number of treasury common shares of Aegon N.V. were as follows: 2017 2016 2015 Number of shares Amount Number of shares Amount Number of shares Amount At January 1 47,473 178 42,998 257 49,537 306 Transactions in 2017: Sale: transactions, average price EUR 3.44 (4,085 ) (14 ) Sale: 1 transaction, average price EUR 3.68 (26,916 ) (99 ) Sale: 1 transaction, average price EUR 3.77 (3,849 ) (14 ) Purchase: 1 transaction, average price EUR 5.09 51,865 263 Transactions in 2016: Purchase: transactions, average price EUR 4.81 83,117 400 Sale: transactions, price average EUR 6.49 (6,153 ) (40 ) Sale: 1 transaction, price EUR 6.38 (20,137 ) (129 ) Purchase: transactions, average price EUR 3.51 29,259 103 Sale: 1 transaction, price EUR 5.11 (29,259 ) (150 ) Shares withdrawn: 1 transaction, price EUR 4.60 (83,117 ) (382 ) Purchase: transactions, average price EUR 3.84 30,765 118 Transactions in 2015: Sale: 1 transaction, price EUR 7.24 (7,628 ) (47 ) Sale: 1 transaction, price EUR 6.62 (16,280 ) (93 ) Purchase: transactions, average price EUR 6.63 16,280 108 Sale: 1 transaction, price EUR 5.40 (19,047 ) (123 ) Purchase: transactions, average price EUR 5.28 20,137 106 At December 31 64,488 314 47,473 178 42,998 257 Movements in the number of treasury common shares B of Aegon N.V. were as follows: 2017 2016 2015 Number of shares Amount Number of shares Amount Number of shares (thousands) Amount At January 1 17,325 2 - - - - Transactions in 2017: Sale: 1 transaction, average price EUR 0.11 (1,979 ) - Sale: 1 transaction, average price EUR 0.11 (13,043 ) (1 ) Purchase: 1 transaction, average price EUR 0.13 13,043 2 Transactions in 2016: Purchase: transactions, average price EUR 0.11 17,325 2 Transactions in 2015: - - - - - - - At December 31 15,346 2 17,325 2 - -
Summary of Treasury Shares	2017 2016 2015 Number of shares Total Number of shares Total Number of shares Total Common shares Held by Aegon N.V. 64,488 314 47,473 178 42,998 257 Held by subsidiaries 1,162 9 1,307 10 1,534 12 Common shares B Held by Aegon N.V. 15,346 2 17,325 2 - - At December 31 80,996 325 66,105 190 44,532 269
Summary of Weighted Average Number of Treasury Shares	Weighted average number of treasury shares, including Weighted average number of treasury 2015 45,097 - 2016 81,570 9,893 2017 38,490 9,841
Summary of Revaluation Reserves	Revaluation reserves Available-for-sale Real estate held for Cash flow hedging Total At January 1, 2017 3,418 59 1,904 5,381 Gross revaluation 1,310 8 (115 ) 1,203 Net (gains) / losses transferred to income statement (1,330 ) - (738 ) (2,069 ) Foreign currency translation differences (228 ) (8 ) (216 ) (452 ) Tax effect 308 9 567 883 Other (28 ) - 1 (27 ) At December 31, 2017 3,450 68 1,402 4,920 At January 1, 2016 4,546 52 1,873 6,471 Gross revaluation 857 8 (131 ) 733 Net (gains) / losses transferred to income statement (2,122 ) - 78 (2,044 ) Foreign currency translation differences (101 ) 2 61 (38 ) Tax effect 240 (3 ) 24 262 Other (2 ) - - (2 ) At December 31, 2016 3,418 59 1,904 5,381 At January 1, 2015 6,741 42 1,525 8,308 Gross revaluation (2,479 ) 8 278 (2,193 ) Net (gains) / losses transferred to income statement (485 ) - (13 ) (498 ) Disposal of a business (468 ) - - (468 ) Foreign currency translation differences 307 5 181 492 Tax effect 934 (2 ) (98 ) 833 Other (3 ) - - (3 ) At December 31, 2015 4,546 52 1,873 6,471
Summary of Revaluation Reserve for Available-for-sale Investments	The closing balances of the revaluation reserve for available-for-sale investments relate to the following instruments: 2017 2016 2015 Shares 40 130 139 Debt securities 3,423 3,245 4,354 Other (14 ) 43 53 Revaluation reserve for available-for-sale investments 3,450 3,418 4,546
Summary of Remeasurement of Defined Benefit Plans	Remeasurement of defined benefit plans 2017 2016 2015 At January 1 (1,820 ) (1,532 ) (1,611 ) Remeasurements of defined benefit plans 224 (392 ) 234 Tax effect (175 ) 89 (75 ) Net exchange differences 102 16 (86 ) Disposal of a business - - 6 Total remeasurement of defined benefit plans (1,669 ) (1,820 ) (1,532 )
Summary of Other Reserves	Other reserves Foreign Net foreign Equity Total At January 1, 2017 1,734 (418 ) 31 1,347 Movement in foreign currency translation and net foreign investment hedging reserves (1,929 ) 129 - (1,800 ) Disposal of a business 7 - - 7 Tax effect 108 (32 ) - 76 Equity movements of joint ventures - - (15 ) (15 ) Equity movements of associates - - (5 ) (5 ) At December 31, 2017 (80 ) (321 ) 11 (390 ) At January 1, 2016 1,731 (467 ) 19 1,283 Movement in foreign currency translation and net foreign investment hedging reserves 25 65 - 91 Tax effect (22 ) (17 ) - (39 ) Equity movements of joint ventures - - 9 9 Equity movements of associates - - 3 3 At December 31, 2016 1,734 (418 ) 31 1,347 At January 1, 2015 268 (382 ) 27 (86 ) Movement in foreign currency translation and net foreign investment hedging reserves 1,687 (181 ) - 1,505 Disposal of a business (127 ) 51 - (76 ) Tax effect (98 ) 45 - (52 ) Equity movements of joint ventures - - (8 ) (8 ) Equity movements of associates - - (1 ) (1 ) At December 31, 2015 1,731 (467 ) 19 1,283
Aegon N.V [member]
Summary of Shareholders' Equity	LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO At January 1, 2017 319 7,873 5,450 (1,820 ) 1,316 1,169 5,966 (190 ) 437 20,520 Net income 2016 retained - - - - - - 437 - (437 ) - Net income 2017 - - - - - - - - 2,469 2,469 Total net income / (loss) - - - - - - 437 - 2,032 2,469 Foreign currency translation differences and movement in foreign investment hedging reserves - - - 102 (1,717 ) - - - - (1,615 ) Changes in revaluation subsidiaries - - (461 ) - - - - - - (461 ) Remeasurement of defined benefit plans of group companies - - - 49 - - - - - 49 Transfer to legal reserve - - 28 - - (47 ) (1 ) - - (20 ) Other - - - - - - 12 - - 12 Other comprehensive income / (loss) - - (433 ) 151 (1,717 ) (47 ) 11 - - (2,035 ) Shares issued 3 - - - - - - - - 3 Dividend common shares - (142 ) - - - - (296 ) - - (438 ) Dividend withholding tax reduction - - - - - - 2 - - 2 Treasury shares - - - - - - 30 (136 ) - (106 ) Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax - - - - - - (131 ) - - (131 ) Repurchased and sold own shares - - - - - - 4 - - 4 At December 31, 2017 322 7,731 5,017 (1,669 ) (401 ) 1,122 6,022 (325 ) 2,469 20,288 LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO At January 1, 2016 328 8,059 6,551 (1,532 ) 1,264 1,048 7,423 (269 ) (432 ) 22,440 Net income 2015 retained - - - - - - (432 ) - 432 - Net income 2016 - - - - - - - - 437 437 Total net income / (loss) - - - - - - (432 ) - 869 437 Foreign currency translation differences and movement in foreign investment hedging reserves - - - 16 52 - - - - 68 Changes in revaluation subsidiaries - - (1,090 ) - - - - - - (1,090 ) Remeasurement of defined benefit plans of group companies - - - (304 ) - - - - - (304 ) Transfer to legal reserve - - (11 ) - - 121 (97 ) - - 13 Other - - - - - - (2 ) - - (2 ) Other comprehensive income / (loss) - - (1,101 ) (288 ) 52 121 (99 ) - - (1,316 ) Shares issued 1 - - - - - - - - 1 Shares withdrawn (10 ) - - - - - (372 ) - - (382 ) Dividend common shares - (186 ) - - - - (304 ) - - (490 ) Dividend withholding tax reduction - - - - - - (2 ) - - (2 ) Treasury shares - - - - - - (106 ) 79 - (27 ) Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax - - - - - - (133 ) - - (133 ) Repurchased and sold own shares - - - - - - (9 ) - - (9 ) At December 31, 2016 319 7,873 5,450 (1,820 ) 1,316 1,169 5,966 (190 ) 437 20,520
Summary of Treasury Stock	As part of their insurance and investment operations, subsidiaries within the Group also hold Aegon N.V. common shares, both for their own account and for account of policyholders. These shares have been treated as treasury shares and are included at their consideration paid or received. 2017 2016 Number of shares Total amount Number of shares Total amount Common shares Held by Aegon N.V. 64,488 314 47,473 178 Held by subsidiaries 1,163 9 1,307 10 Common shares B Held by Aegon N.V. 15,346 2 17,325 2 At December 31 80,996 325 66,105 190
Aegon N.V [member] | Common Share [member]
Summary of Movement of Number of Treasury Common Shares	Movements in the number of treasury common shares of Aegon N.V. were as follows: 2017 2016 Number of shares Amount Number of shares Amount At January 1 47,473 178 42,998 257 Transactions in 2017: Sale: transactions, average price EUR 3.44 (4,085 ) (14 ) Sale: 1 transaction, average price EUR 3.68 (26,916 ) (99 ) Sale: 1 transaction, average price EUR 3.77 (3,849 ) (14 ) Purchase: 1 transaction, average price EUR 5.09 51,865 263 Transactions in 2016: Purchase: transactions, average price EUR 4.81 83,117 400 Sale: transactions, price average EUR 6.49 (6,153 ) (40 ) Sale: 1 transaction, price EUR 6.38 (20,137 ) (129 ) Purchase: transactions, average price EUR 3.51 29,259 103 Sale: 1 transaction, price EUR 5.11 (29,259 ) (150 ) Shares withdrawn: 1 transaction, price EUR 4.60 (83,117 ) (382 ) Purchase: transactions, average price EUR 3.84 30,765 118 At December 31 64,488 314 47,473 178
Aegon N.V [member] | Common Share B [member]
Summary of Movement of Number of Treasury Common Shares	Movements in the number of treasury common shares B of Aegon N.V. were as follows: 2017 2016 Number of shares Amount Number of shares (thousands) Amount At January 1 17,325 2 - - Transactions in 2017: Sale: transaction, average price EUR 0.11 (1,979 ) - Sale: transaction, average price EUR 0.11 (13,043 ) (1 ) Purchase: transaction, average price EUR 0.13 13,043 2 Transactions in 2016: Purchase: transactions, average price EUR 0.11 17,325 2 At December 31 15,346 2 17,325 2

Other equity instruments (Table

Other equity instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Schedule of Number and Weighted Average Exercise Prices of Other Equity Instruments	Junior Perpetual Share options 1) Non-cumulative Total At January 1, 2017 3,008 454 65 271 3,797 Shares granted - - 26 - 26 Shares vested - - (30 ) - (30 ) At December 31, 2017 3,008 454 61 271 3,794 At January 1, 2016 3,008 454 68 271 3,800 Shares granted - - 13 - 13 Shares vested - - (16 ) - (16 ) At December 31, 2016 3,008 454 65 271 3,797 At January 1, 2015 3,008 454 94 271 3,827 Shares granted / Share options cost incurred - - 26 - 26 Shares vested / Share options forfeited - - (53 ) - (53 ) At December 31, 2015 3,008 454 68 271 3,800 1 Share options and incentive plans include the shares and options granted to personnel which are not yet vested.
Perpetual cumulative subordinated bonds [member]
Summary of Coupon Details	Coupon rate Coupon date Year of next 2017 2016 2015 EUR 136 million 5.185% 1), 4) Annual, October 14 2018 136 136 136 EUR 203 million 4.260% 2), 4) Annual, March 4 2021 203 203 203 EUR 114 million 1.506% 3), 4) Annual, June 8 2025 114 114 114 At December 31 454 454 454 1 The coupon of the EUR 136 million bonds was originally set at 7.25% until October 14, 2008. Subsequently, the coupon has been reset at 5.185% until October 14, 2018. 2 The coupon of the EUR 203 million bonds was originally set at 7.125% until March 4, 2011. Subsequently, the coupon has been reset at 4.26% until March 4, 2021. 3 The coupon of the EUR 114 million bonds was originally set at 8% until June 8, 2005. Subsequently, the coupon has been reset at 4.156% until 2015 and 1.506% until 2025. 4 If the bonds are not called on the respective call dates and after consecutive period of ten years, the coupons will be reset at the then prevailing effective yield of ten-year Dutch government securities plus a spread of 85 basis points.
Non-cumulative subordinated notes [member]
Summary of Coupon Details	Coupon rate Coupon date Year of next 2017 2016 2015 USD 525 million 8% Quarterly, February 15 2018 271 271 271 At December 31 271 271 271
Junior perpetual capital securities [member]
Summary of Coupon Details	Junior perpetual capital securities Coupon rate Coupon date, as of Year of 2017 2016 2015 USD 500 million 6.50% Quarterly, December 15 2018 424 424 424 USD 250 million floating LIBOR rate 1) Quarterly, December 15 2018 212 212 212 USD 500 million floating CMS rate 2) Quarterly, July 15 2018 402 402 402 USD 1 billion 6.375% Quarterly, June 15 2018 821 821 821 EUR 950 million floating DSL rate 3) Quarterly, July 15 2018 950 950 950 EUR 200 million 6.0% Annually, July 21 2018 200 200 200 At December 31 3,008 3,008 3,008 1 The coupon of the USD 250 million junior perpetual capital securities is reset each quarter based on the then prevailing three-month LIBOR yield plus a spread of 87.5 basis points, with a minimum of 4%. 2 The coupon of the USD 500 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year US dollar interest rate swap yield plus a spread of ten basis points, with a maximum of 8.5%. 3 The coupon of the EUR 950 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year Dutch government bond yield plus a spread of ten basis points, with a maximum of 8%.
Aegon N.V [member]
Schedule of Number and Weighted Average Exercise Prices of Other Equity Instruments	Junior Perpetual Share options Non-cumula- Total At January 1, 2017 3,008 454 65 271 3,797 Shares granted / Share options cost incurred - - 26 - 26 Shares vested / Share options forfeited - - (30 ) - (30 ) At December 31, 2017 3,008 454 61 271 3,794 At January 1, 2016 3,008 454 68 271 3,801 Shares granted / Share options cost incurred - - 13 - 13 Shares vested / Share options forfeited - - (16 ) - (16 ) At December 31, 2016 3,008 454 65 271 3,797
Aegon N.V [member] | Perpetual cumulative subordinated bonds [member]
Summary of Coupon Details	Perpetual cumulative subordinated bonds Coupon rate Coupon date Year of next 2017 2016 EUR 136 million 5.185% 1), 4) Annual, October 14 2018 136 136 EUR 203 million 4.260% 2), 4) Annual, March 4 2021 203 203 EUR 114 million 1.506% 3), 4) Annual, June 8 2025 114 114 At December 31 454 454 1 The coupon of the EUR 136 million bonds was originally set at 7.25% until October 14, 2008. Subsequently, the coupon has been reset at 5.185% until October 14, 2018. 2 The coupon of the EUR 203 million bonds was originally set at 7.125% until March 4, 2011. Subsequently, the coupon has been reset at 4.26% until March 4, 2021. 3 The coupon of the EUR 114 million bonds was originally set at 8% until June 8, 2005. Subsequently, the coupon has been reset at 4.156% until 2015 and 1.506% until 2025. 4 If the bonds are not called on the respective call dates and after consecutive period of ten years, the coupons will be reset at the then prevailing effective yield of ten-year Dutch government securities plus a spread of 85 basis points.
Aegon N.V [member] | Non-cumulative subordinated notes [member]
Summary of Coupon Details	Non-cumulative subordinated notes Coupon Coupon date, Year of next 2017 2016 USD 525 million 8 % Quarterly, 2018 271 271 At December 31 271 271
Aegon N.V [member] | Junior perpetual capital securities [member]
Summary of Coupon Details	Junior perpetual capital securities Coupon rate Coupon date, as of Year of next 2017 2016 USD 500 million 6.50% Quarterly, December 15 2018 424 424 USD 250 million floating LIBOR 1) Quarterly, December 15 2018 212 212 USD 500 million floating CMS 2) Quarterly, July 15 2018 402 402 USD 1 billion 6.375% Quarterly, June 15 2018 821 821 EUR 950 million floating DSL 3) Quarterly, July 15 2018 950 950 EUR 200 million 6.0% Annually, July 2018 200 200 At December 31 3,008 3,008 1 The coupon of the USD 250 million junior perpetual capital securities is reset each quarter based on the then prevailing three-month LIBOR yield plus a spread of 87.5 basis points, with a minimum of 4%. 2 The coupon of the USD 500 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year US dollar interest rate swap yield plus a spread of ten basis points, with a maximum of 8.5%. 3 The coupon of the EUR 950 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year Dutch government bond yield plus a spread of ten basis points, with a maximum of 8%.

Subordinated borrowings (Tables

Subordinated borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Subordinated Borrowings	Coupon rate Coupon date Year of next call 2017 2016 Fixed floating subordinated notes EUR 700 million 4% Annually, April 25 2024 695 695 Non-cumulative subordinated notes USD 525 million 8% Quarterly, February 15 2018 69 72 At December 31 764 767
Aegon N.V [member]
Summary of Subordinated Borrowings	Coupon rate Coupon date Year of next call 2017 2016 Fixed floating subordinated notes EUR 700 million 4% Annually, April 25 2024 695 695 Non-cumulative subordinated notes USD 525 million 8% Quarterly, February 15 2018 69 72 At December 31 764 767

Trust pass-through securities (

Trust pass-through securities (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Trust Pass-through Securities	Coupon rate Coupon date Year of issue Year of maturity Year of next call 2017 2016 USD 225 million 1) 7.65% Semi-annually, December 1 1996 2026 n.a. 91 109 USD 190 million 1) 7.625% Semi-annually, November 15 1997 2037 n.a. 41 47 At December 31 133 156

Insurance contracts (Tables)

Insurance contracts (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Sensitivity Analysis of Net Income and Shareholders' Equity to Changes in Various Underwriting Risks	2017 2016 Sensitivity analysis of net income and shareholders’ equity to changes in various underwriting risks Estimated approximate effect On shareholders’ On net income On shareholders’ On net income 20% increase in lapse rates 69 94 47 36 20% decrease in lapse rates (124 ) (155 ) (104 ) (91 ) 10% increase in mortality rates 514 91 548 153 10% decrease in mortality rates (1,011 ) (577 ) (1,039 ) (582 ) 10% increase in morbidity rates (492 ) (463 ) (521 ) (445 ) 10% decrease in morbidity rates 189 142 184 127
Summary of Insurance Contracts for General Account	Insurance contracts for general account 2017 2016 Life insurance 98,422 105,763 Non-life insurance - Unearned premiums and unexpired risks 5,447 5,822 - Outstanding claims 2,206 2,226 - Incurred but not reported claims 830 1,018 Incoming reinsurance 3,913 4,739 At December 31 110,818 119,569 2017 2016 Non-life insurance: - Accident and health insurance 8,225 8,821 - General insurance 259 245 Total non-life insurance 8,484 9,066 Insurance contracts for account of policyholders 2017 2016 At January 1 120,929 112,679 Portfolio transfers and acquisitions (259 ) (353 ) Gross premium and deposits – existing and new business 12,144 12,931 Unwind of discount / interest credited 13,349 7,085 Insurance liabilities released (10,882 ) (8,206 ) Fund charges released (1,746 ) (1,725 ) Changes in valuation of expected future benefits 100 268 Transfer (to) / from insurance contracts (135 ) (1 ) Transfer (to) / from investment contracts for account of policyholders - (808 ) Transfers to disposal groups (1,359 ) (1,002 ) Net exchange differences (10,289 ) 55 Other 317 6 At December 31 122,168 120,929
Summary of Movements in Insurance	Movements during the year in life insurance: 2017 2016 At January 1 105,763 109,884 Acquisitions - 7 Disposals - (99 ) Portfolio transfers and acquisitions 139 97 Gross premium and deposits – existing and new business 6,498 6,356 Unwind of discount / interest credited 4,200 4,050 Insurance liabilities released (9,247 ) (10,033 ) Changes in valuation of expected future benefits (1,145 ) 820 Loss recognized as a result of liability adequacy testing 843 - Shadow accounting adjustments 92 2,053 Net exchange differences (8,598 ) 812 Transfer (to) / from reinsurance assets 23 - Transfer (to) / from insurance contracts for account of policyholders 135 1 Transfers to disposal groups 1) (239 ) (8,190 ) Other (43 ) 5 At December 31 98,422 105,763 1     Movements during the year in non-life insurance: 2017 2016 At January 1 9,066 8,616 Disposals - (334 ) Portfolio transfers and acquisitions 5 - Gross premiums – existing and new business 1,893 2,140 Unwind of discount / interest credited 444 426 Insurance liabilities released (1,065 ) (1,186 ) Changes in valuation of expected future claims 173 44 Change in unearned premiums (1,017 ) (1,093 ) Change in unexpired risks 3 2 Incurred related to current year 750 684 Incurred related to prior years 231 354 Release for claims settled current year (287 ) (253 ) Release for claims settled prior years (717 ) (843 ) Shadow accounting adjustments 76 289 Change in IBNR (79 ) (15 ) Net exchange differences (986 ) 242 Other (5 ) (5 ) At December 31 8,484 9,066 Movements during the year in incoming reinsurance: 2017 2016 At January 1 4,739 4,542 Gross premium and deposits – existing and new business 1,625 1,700 Unwind of discount / interest credited 175 179 Insurance liabilities released (2,005 ) (1,904 ) Change in unearned premiums 1 4 Changes in valuation of expected future benefits (57 ) 59 Shadow accounting adjustments (1 ) - Loss recognized as a result of liability adequacy (1 ) 9 Net exchange differences (558 ) 138 Other (4 ) 13 At December 31 3,913 4,739

Investment contracts (Tables)

Investment contracts (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Investment Contracts for General Account	Without discretionary With discretionary Total At January 1, 2017 19,217 355 19,572 Portfolio transfers and acquisitions 55 - 55 Deposits 8,432 - 8,432 Withdrawals (8,455 ) - (8,455 ) Investment contracts liabilities released - (64 ) (64 ) Interest credited 268 - 268 Net exchange differences (1,102 ) (13 ) (1,114 ) Transfer to/from other headings 21 - 21 Other (1,771 ) - (1,771 ) At December 31, 2017 16,665 278 16,943 At January 1, 2016 17,260 457 17,718 Portfolio transfers and acquisitions 105 - 105 Deposits 7,200 - 7,200 Withdrawals (6,059 ) - (6,059 ) Investment contracts liabilities released - (42 ) (42 ) Interest credited 267 - 267 Net exchange differences 294 (61 ) 233 Other 150 - 150 At December 31, 2016 19,217 355 19,572 The value of investment contracts for general account decreased in 2017 mainly due to a paydown of USD 2 billion to the Federal Home Loan Bank visible under “other” relating to advances on spread products, and due to net exchange differences. Investment contracts consist of the following: 2017 2016 Institutional guaranteed products 1,053 3,223 Fixed annuities 5,714 6,809 Savings accounts 9,568 8,814 Investment contracts with discretionary participation features 278 355 Other 331 371 At December 31 16,943 19,572
Summary of Investment Contracts for Account of Policy Holders	Without discretionary With discretionary Total At January 1, 2017 42,803 41,971 84,774 Gross premium and deposits – existing and new business 5,393 1,313 6,706 Withdrawals (7,654 ) - (7,654 ) Interest credited 4,589 4,558 9,147 Investment contracts liabilities released - (9,006 ) (9,006 ) Fund charges released (176 ) - (176 ) Net exchange differences (4,272 ) (1,570 ) (5,842 ) Transfers to disposal groups (3,498 ) - (3,498 ) Other (16 ) - (16 ) At December 31, 2017 37,169 37,265 74,434 At January 1, 2016 40,365 49,754 90,119 Gross premium and deposits – existing and new business 6,553 1,724 8,277 Withdrawals (6,393 ) - (6,393 ) Interest credited 2,649 7,280 9,929 Investment contracts liabilities released - (10,841 ) (10,841 ) Fund charges released (209 ) - (209 ) Net exchange differences (12 ) (6,754 ) (6,767 ) Transfer (to) / from insurance contracts for account of policyholders - 808 808 Other (149 ) - (149 ) At December 31, 2016 42,803 41,971 84,774

Guarantees in insurance cont114

Guarantees in insurance contracts (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Liabilities for Financial Guarantees for Minimum Benefits, Net of Present Value of Expected Future Premiums	The following table provides information on the liabilities for financial guarantees for minimum benefits, net of present value of the expected future premiums that are received to cover these guarantees: 2017 2016 United 1) The 2) United Total 3) United 1) The 2) United Total 3) At January 1 405 1,555 68 2,028 510 1,432 56 1,998 Incurred guarantee benefits 4) (114 ) (8 ) (37 ) (158 ) (113 ) 123 - 10 Paid guarantee benefits (1 ) - - (1 ) (1 ) - 12 11 Transfers to disposal groups - - (30 ) (30 ) - - - - Net exchange differences (42 ) - (2 ) (44 ) 10 - - 10 At December 31 247 1,547 - 1,794 405 1,555 68 2,028 Account value 5) 33,371 8,805 - 42,175 35,374 8,957 1,350 45,681 Net amount at risk 6) 94 1,737 - 1,831 222 1,972 68 2,262 1 Guaranteed minimum accumulation and withdrawal benefits. 2 Fund plan and unit-linked guarantees. 3 Balances are included in the derivatives liabilities on the face of the statement of financial position; refer to note 25 Derivatives. 4 Incurred guarantee benefits mainly comprise the effect of guarantees from new contracts, releases related to expired out-of-the-money guarantees and fair value movements during the reporting year. 5 Account value reflects the actual fund value for the policyholders. 6 The net amount at risk represents the sum of the positive differences between the discounted maximum amount payable under the guarantees and the account value.
Summary of Liabilities for Guarantees for Minimum Benefits	The following table provides information on the liabilities for guarantees for minimum benefits that are included in the valuation of the host contracts: 2017 2016 GMDB 1) GMIB 2) Total 4) GMDB 1) GMIB 2) Total 4) At January 1 531 849 1,381 544 816 1,359 Incurred guarantee benefits 5) (49 ) (121 ) (171 ) 48 83 130 Paid guarantee benefits (60 ) (26 ) (86 ) (75 ) (74 ) (148 ) Net exchange differences (58 ) (94 ) (153 ) 15 25 40 At December 31 364 608 972 531 849 1,381 GMDB 1) 3) GMIB 2) 3) GMDB 1) 3) GMIB 2) 3) Account value 6) 52,070 5,270 54,821 5,628 Net amount at risk 7) 1,309 474 2,615 684 Average attained age of contract holders 69 70 69 69 1 Guaranteed minimum death benefit in the United States. 2 Guaranteed minimum income benefit in the United States. 3 Note that the variable annuity contracts with guarantees may offer more than one type of guarantee in each contract; therefore, the amounts listed are not mutually exclusive. 4 Balances are included in the insurance liabilities on the face of the statement of financial position; refer to note 36 Insurance contracts. 5 Incurred guarantee benefits mainly comprise the effect of guarantees from new contracts, releases related to expired out-of-the-money guarantees and value changes as a consequence of interest movements during the reporting year. 6 Account value reflects the actual fund value for the policyholders. 7 The net amount at risk is defined as the present value of the minimum guaranteed annuity payments available to the contract holder determined in accordance with the terms of the contract in excess of the current account balance.
Summary of Liabilities for Guarantees That are Included in Valuation of Host Contracts, Net of Present Value of Expected Future Premiums	The following table provides information on the liabilities for guarantees that are included in the valuation of the host contracts, net of the present value of the expected future premiums that are received to cover these guarantees: 2017 2016 GMI 1), 2) GMI 1), 2) At January 1 5,542 4,741 Incurred guarantee benefits 3) (823 ) 801 At December 31 4,719 5,542 Account value 4) 18,754 19,467 Net amount at risk 5) 4,440 5,017 1 Guaranteed minimum investment return in the Netherlands. 2 Balances are included in the insurance liabilities on the face of the statement of financial position; refer to note 36 Insurance contracts. 3 Incurred guarantee benefits mainly comprise the effect of guarantees from new contracts, releases related to expired out-of-the-money guarantees and fair value movements during the reporting year. 4 Account value reflects the liability value of the insurance contracts as a whole. 5 The net amount at risk represents the sum of the differences between the guaranteed and actual amount that is credited to the policyholders. For Individual policies only positive differences are included, for Group pensions contracts carry forwards of negative differences are recognized.

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Borrowings	2017 2016 Capital funding 2,280 2,386 Operational funding 11,355 10,766 At December 31 13,635 13,153 Current 1,692 1,902 Non-current 11,943 11,251 Fair value of borrowings 14,035 13,545
Summary of Undrawn Committed Borrowings Facilities	2017 2016 Floating-rate - Expiring within one year 197 463 - Expiring beyond one year 3,170 3,422 At December 31 3,367 3,885
Capital funding [member]
Summary of Borrowings	A detailed composition of capital funding is included in the following table: (sorted at maturity) Coupon rate Coupon date Issue / 2017 2016 EUR 500 million Unsecured Notes 3% July 18 2012 / 17 - 500 EUR 500 million Unsecured Notes 0% August 30 2017 / 18 500 - EUR 75 million Medium-Term Notes 1) 4.625% December 9 2004 / 19 82 84 USD 500 million Senior Notes 1), 2) 5.75% Semi-annually 2005 / 20 455 526 EUR 500 million Senior Unsecured Notes 1.00% December 8 2016 / 23 495 495 GBP 250 million Medium-Term Notes 6.125% December 15 1999 / 31 279 291 GBP 400 million Senior Unsecured Notes 6.625% Semi-annually 2009 / 39 445 462 Other 24 28 At December 31 2,280 2,386 1 Measured at fair value. 2 Issued by subsidiaries of, and guaranteed by, Aegon N.V.
Operational funding [member]
Summary of Borrowings	Coupon rate Coupon date Issue / 2017 2016 Revolving Loan Facility Warehouse Mortgage Loans 1) Floating Monthly - / 2018-20 729 423 EUR 1,365 million “SAECURE 12” RMBS Note 1), 2) Floating Quarterly 2012 / 17 - 1,030 EUR 1,123 million “SAECURE 13” RMBS Note 1), 3) Floating Quarterly 2013 / 18 750 862 EUR 1,367 million “SAECURE 14” RMBS Note 1), 4) Floating Quarterly 2014 / 19 994 1,126 EUR 1,443 million “SAECURE 15” RMBS Note 1), 5) Floating Quarterly 2014 / 20 1,164 1,284 EUR 750 million Conditional Pass-Through Covered Bond 1), 6) 0.267% Annual 2015 / 20 747 747 EUR 500 million Conditional Pass-Through Covered Bond 1), 7) 0.250% Annual 2016 / 23 496 495 EUR 500 million Conditional Pass-Through Covered Bond 1), 8) 0.750% Annual 2017 / 27 486 - EUR 500 million Conditional Pass-Through Covered Bond 1), 9) 0.375% Annual 2017 / 24 497 - USD 1.54 billion Variable Funding Surplus Note 10), 11) Floating Quarterly 2006 / 36 1,322 1,505 USD 550 million Floating Rate Guaranteed Note 10), 12) Floating Quarterly 2007 / 37 - 450 FHLB Secured borrowings 1) Floating Quarterly 2016 / 46 4,160 2,839 Other 10 3 At December 31 11,355 10,766 1 2 3 4 5 6 7 8 9 10 11   12

Provisions (Tables)

Provisions (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Provisions	2017 2016 At January 1 173 175 Additional provisions 107 92 Disposals (72 ) (33 ) Unused amounts reversed through the income statement - (3 ) Used during the year 12 (55 ) Net exchange differences (9 ) (3 ) At December 31 210 173 Current 151 88 Non-current 60 85

Defined benefit plans (Tables)

Defined benefit plans (Tables)	12 Months Ended
	Dec. 31, 2017
Summary of Defined Benefit Plans	2017 2016 Retirement benefit plans 3,657 4,453 Other post-employment benefit plans 293 314 Total defined benefit plans 3,950 4,767 Retirement benefit plans in surplus 55 51 Other post-employment benefit plans in surplus - - Total defined benefit assets 55 51 Retirement benefit plans in deficit 3,712 4,503 Other post-employment benefit plans in deficit 293 314 Total defined benefit liabilities 4,005 4,817
Summary of Movements of Defined Benefit Plans	2017 2016 Movements during the year in defined benefit plans Retirement Other post- Total Retirement Other post- Total At January 1 4,453 314 4,767 4,135 296 4,430 Defined benefit expenses 242 19 262 302 22 324 Remeasurements of defined benefit plans (233 ) 10 (224 ) 388 5 392 Acquisition of subsidiary - - - - 3 3 Contributions paid (163 ) - (163 ) (250 ) - (250 ) Benefits paid (108 ) (19 ) (128 ) (106 ) (18 ) (125 ) Net exchange differences (133 ) (31 ) (164 ) (15 ) 7 (8 ) Other (400 ) - (400 ) - - - At December 31 3,657 293 3,950 4,453 314 4,767
Summary of Amounts Recognized in Statement of Financial Positions	The amounts recognized in the statement of financial position are determined as follows: 2017 2016 Retirement Other post- Total Retirement Other post- Total Present value of wholly or partly funded obligations 4,389 - 4,389 4,834 - 4,834 Fair value of plan assets (3,622 ) - (3,622 ) (3,793 ) - (3,793 ) 767 - 767 1,041 - 1,041 Present value of wholly unfunded obligations 1) 2,890 293 3,183 3,412 314 3,726 At December 31 3,657 293 3,950 4,453 314 4,767 1
Summary of Fair Value of Plan Assets	The fair value of Aegon’s own transferable financial instruments included in plan assets and the fair value of other assets used by Aegon included in plan assets was nil in both 2017 and 2016.   2017 2016 Defined benefit expenses Retirement Other post- Total Retirement Other post- Total Current year service cost 148 11 158 127 13 140 Net interest on the net defined benefit liability (asset) 99 10 109 123 11 134 Past service cost (5 ) (1 ) (6 ) 53 (2 ) 50 Total defined benefit expenses 242 19 262 302 22 324 2015 Retirement Other post- Total Current year service cost 134 10 144 Net interest on the net defined benefit liability (asset) 119 10 129 Past service cost (7 ) 20 13 Total defined benefit expenses 246 40 286
Summary of Breakedown of Plan Assets for Retirement of Benefit Plans	Breakdown of plan assets for retirement benefit plans Quoted Unquoted Total in % of Quoted Unquoted Total in % of Equity instruments 127 4 131 4% 206 14 219 6% Debt instrument 397 411 809 22% 570 713 1,283 34% Derivatives - 254 254 7% - 179 179 5% Investment funds 5 2,027 2,032 56% 4 1,701 1,705 45% Structured securities - - - 0% - 3 3 0% Other 25 372 397 11% 12 392 405 11% At December 31 554 3,068 3,622 100% 792 3,001 3,793 100%
Summary of Actuarial Assumptions used to Determine Defined Benefit Obligations	Actuarial assumptions used to determine defined benefit obligations at year-end 2017 2016 Demographic actuarial assumptions Mortality UK mortality table 1) UK mortality table 1) Financial actuarial assumptions Discount rate 2.56% 2.69% Price inflation 3.29% 3.37% 1 The principal actuarial assumptions have an effect on the amounts reported for the defined benefit obligation. A change as indicated in the table below in the principal actuarial assumptions would have the following effects on the defined benefit obligation per year-end:   Estimated approximate effects on the defined benefit obligation 2017 2016 Demographic actuarial assumptions 10% increase in mortality rates (44 ) (51 ) 10% decrease in mortality rates 50 58 Financial actuarial assumptions 100 basis points increase in discount rate (299 ) (371 ) 100 basis points decrease in discount rate 412 513 100 basis points increase in price inflation 169 213 100 basis points decrease in price inflation (248 ) (289 )
Commissions and expenses [member]
Summary of Movements of Defined Benefit Plans	Movements during the year of the present value of the defined benefit obligations 2017 2016 At January 1 8,560 8,000 Acquisition of subsidiary - 3 Current year service cost 158 140 Interest expense 230 267 Remeasurements of the defined benefit obligations: - Actuarial gains and losses arising from changes in demographic assumptions 30 (211 ) - Actuarial gains and losses arising from changes in financial assumptions 29 894 Past service cost (6 ) 50 Contributions by plan participants 12 11 Benefits paid (523 ) (461 ) Net exchange differences (519 ) (133 ) Other (400 ) - At December 31 7,572 8,560 Movements during the year in plan assets for retirement benefit plans 2017 2016 At January 1 3,793 3,569 Interest income (based on discount rate) 121 134 Remeasurements of the net defined liability (asset) 283 290 Contributions by employer 175 261 Benefits paid (396 ) (336 ) Net exchange differences (355 ) (125 ) At December 31 3,622 3,793
Aegon United Kingdom [member]
Summary of Actuarial Assumptions used to Determine Defined Benefit Obligations	The principal actuarial assumptions that apply for the year ended December 31 are as follows: Actuarial assumptions used to determine defined benefit obligations at 2017 2016 Demographic actuarial assumptions Mortality US mortality table 1) US mortality table 2 ) Financial actuarial assumptions Discount rate 3.55 % 4.10 % Salary increase rate 3.85 % 3.87 % Health care trend rate 7.40 % 7.25 % 1 U.S. Society of Actuaries RP2014 mortality table with Scale MP2017. 2 U.S. Society of Actuaries RP2014 mortality table with Scale MP2016. The principal actuarial assumptions have an effect on the amounts reported for the defined benefit obligation. A change as indicated in the table below in the principal actuarial assumptions would have the following effects on the defined benefit obligation per year-end: Estimated approximate 2017 2016 Demographic actuarial assumptions 10% increase in mortality rates (76 ) (77 ) 10% decrease in mortality rates 83 84 Financial actuarial assumptions 100 basis points increase in discount rate (402 ) (440 ) 100 basis points decrease in discount rate 498 546 100 basis points increase in salary increase rate 38 42 100 basis points decrease in salary increase rate (33 ) (37 ) 100 basis points increase in health care trend rate 15 16 100 basis points decrease in health care trend rate (13 ) (14 )
Target Allocation of Plan Assets for Retirement Benefit Plans for the Next Annual Perio	Target allocation of plan assets for retirement Equity instruments 29% Debt instruments 71%
Aegon United States of America [member]
Summary of Actuarial Assumptions used to Determine Defined Benefit Obligations	Target allocation of plan assets for retirement benefit plans for the next annual period is: Equity instruments 22-30% Debt instruments 42-53% Other 22-31%
Aegon Nederland N.V. [member]
Summary of Actuarial Assumptions used to Determine Defined Benefit Obligations	The principal actuarial assumptions that apply for the year-ended December 31 are as follows: Actuarial assumptions used to determine defined benefit obligations at year-end 2017 2016 Demographic actuarial assumptions Mortality NL mortality table 1) NL mortality table 2) Financial actuarial assumptions Discount rate 2.09% 1.79% Salary increase rate 3) Curve 2017 Curve 2016 Indexation 3) 44.10% of Curve 2017 45.20% of Curve 2016 1 2 3

Deferred gains (Tables)

Deferred gains (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Deferred Gains	2017 2016 At January 1 64 112 Income deferred 1 4 Disposals - (31 ) Release to income statement (5 ) (6 ) Net exchange differences (2 ) (14 ) Transfers to disposal groups (45 ) - At December 31 13 64

Deferred tax (Tables)

Deferred tax (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Deferred Tax	2017 2016 Deferred tax assets 79 87 Deferred tax liabilities 1,029 2,201 Total net deferred tax liability / (asset) 950 2,113 Deferred tax assets comprise temporary differences on: 2017 2016 Financial assets (20 ) (22 ) Insurance and investment contracts (19 ) (55 ) Deferred expenses, VOBA and other intangible assets (140 ) (148 ) Defined benefit plans 26 54 Losses 176 221 Other 57 37 At December 31 79 87 Deferred tax liabilities comprise temporary differences on: 2017 2016 Real estate 554 541 Financial assets 1,724 3,143 Insurance and investment contracts (1,806 ) (3,042 ) Deferred expenses, VOBA and other intangible assets 1,752 3,150 Defined benefit plans (268 ) (592 ) Losses (120 ) (188 ) Other (807 ) (812 ) At December 31 1,029 2,201
Schedule of NetDeferred Tax Assets and Liabilities has been Recognized	The following table provides a movement schedule of net deferred tax broken-down by those items for which a deferred tax asset or liability has been recognized. LOGO LOGO LOGO LOGO LOGO LOGO LOGO LOGO At January 1, 2017 541 3,165 (2,988 ) 3,298 (645 ) (407 ) (850 ) 2,113 Acquisitions / Additions - - - 9 - (1 ) (14 ) (6 ) Charged to income statement 37 32 609 (1,016 ) 120 78 (62 ) (202 ) Charged to equity (9 ) (874 ) - - 174 - (5 ) (715 ) Net exchange differences (16 ) (270 ) 241 (322 ) 57 27 111 (172 ) Disposal of a business - - - 2 - - - 2 Transfers to disposal groups - - - - - 8 - 8 Transfer to current income tax - - - - - - (73 ) (73 ) Transfer to/from other headings - (300 ) 351 (79 ) - - 27 - Other - (9 ) - - - - 2 (7 ) At December 31, 2017 554 1,744 (1,787 ) 1,892 (295 ) (296 ) (863 ) 950 At January 1, 2016 434 2,735 (2,500 ) 3,008 (688 ) (500 ) (261 ) 2,227 Charged to income statement 99 596 (380 ) 222 135 57 (543 ) 185 Charged to equity 3 (264 ) (2 ) 2 (85 ) - (2 ) (350 ) Net exchange differences 5 84 (108 ) 69 (6 ) 34 (45 ) 34 Transfer to current income tax - 16 - - - - - 16 Other - (1 ) 2 (3 ) (1 ) 1 3 - At December 31, 2016 541 3,165 (2,988 ) 3,298 (645 ) (409 ) (849 ) 2,113
Schedule of Loss Carryforward period and Deferred Corporate Income Tax Assets Not Recognized	For the following amounts, arranged by loss carry forward periods, the deferred corporate income tax asset is not recognized: Gross amounts 1) Not recognized deferred tax assets 2017 2016 2017 2016 < 5 years 89 101 22 26 > 137 130 18 16 > - 1 25 33 > - - - - Indefinitely 499 396 111 94 At December 31 725 628 177 170 1 The gross value of state tax loss carry forward is not summarized in the disclosure, due to the fact that the United States files in different state jurisdictions with various applicable tax rates and apportionment rules
Schedule ofDeferred Corpoarte Income Tax Deducitible Tempory Difference for which Deferred Tax Assets Recognized	Gross amounts Deferred tax assets 2017 2016 2017 2016 Deferred corporate income tax asset dependent on retaining bonds and similar investments until the earlier of market recovery or maturity 1) - 816 - 286 Deferred corporate income tax asset dependent on future taxable profits 261 362 46 64 At December 31 261 1,179 46 350 1 The amendment of IAS 12, relating to deferred tax assets on unrealized losses, changed the qualification by Aegon of ‘holding bonds and similar investments until the earlier of market recovery or maturity’ from a tax planning opportunity into a source of income with no impact on the figures presented.

Other liabilities (Tables)

Other liabilities (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Other Liabilities	2017 2016 1) Payables due to policyholders 1,184 1,337 Payables due to brokers and agents 385 428 Payables out of reinsurance 3,010 2,443 Social security and taxes payable 125 125 Investment creditors 1,228 1,437 Cash collateral on derivative transactions 2,335 2,841 Cash collateral on securities lended 3,277 3,633 Cash collateral - other 43 50 Repurchase agreements 1,373 1,489 Commercial paper 72 128 Bank overdrafts 2 1 Other creditors 2,174 3,067 At December 31 15,208 16,978 Current 14,992 16,101 Non-current 216 877 1 Certain amounts within Other liabilities in 2016 have been reclassified to conform to the current year presentation as certain accounts were previously not mapped correctly to the line items disclosed in this note. These reclassifications are not considered material as these reclassifications had no effect on net income, shareholders’ equity and earnings per share, nor on the total of other liabilities of EUR 16,978 reported in 2016. Reclassifications affected all items, except for Commercial paper and Bank overdrafts.

Accruals (Tables)

Accruals (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Accruals	2017 2016 Accrued interest 183 131 Accrued expenses 147 106 At December 31 329 237

Capital management and solve122

Capital management and solvency (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Composition of Available Own Funds Across Tiers	The below table provides the composition of Aegon’s available own funds across Tiers: Available own funds December 31, 2017 1) December 31, 2016 1) December 31, 2016 2) Unrestricted Tier 1 10,428 10,081 10,656 Restricted Tier 1 3,540 3,817 3,817 Tier 2 1,213 1,291 2,008 Tier 3 448 768 1,638 Total available own funds 15,628 15,957 18,119 1 The tiering information is based on the revised method which was confirmed by the DNB in 2017. 2 The 2016 comparative numbers are the final numbers as disclosed in Aegon’s 2016 Solvency and Financial Condition Report.
Summary of Equity Compares to Solvency II Own Funds	IFRS equity compares to Solvency II own funds as follows: December 31, 2017 1) December 31, 2016 1) December 31, 2016 2) Shareholders’ Equity 20,288 20,520 20,520 IFRS adjustments for Other Equity instruments and non controlling interests 3,813 3,821 3,821 Group Equity 24,102 24,341 24,341 Solvency II revaluations (5,416 ) (5,241 ) (5,241 ) Excess of Assets over Liabilities 18,685 19,100 19,100 Availability adjustments (606 ) (361 ) (361 ) Fungibility restrictions 2) (693 ) (619 ) (619 ) Transferability restrictions 3) (1,758 ) (2,162 ) - Available own funds 15,628 15,957 18,119 1 The own funds information is based on the revised method which was confirmed by the DNB in 2017. 2 Amongst others, this contains the exclusion of Aegon Bank. 3 This includes the transferability restriction related to the new RBC CAL conversion methodology. 4 The 2016 comparative numbers are the final numbers as disclosed in Aegon’s 2016 Solvency and Financial Condition Report.
Summary of Composition of Total Capitalization and Calculation of Gross Financial Leverage Ratio	The following table shows the composition of the total capitalization and the calculation of the gross financial leverage ratio: Note 2017 2016 Total shareholders’ equity - based on IFRS as adopted by the EU 2 20,573 20,913 Non-controlling interests, share options and incentive plans not yet exercised 33, SOFP 2) 81 88 Revaluation reserves 32 (4,920 ) (5,381 ) Remeasurement of defined benefit plans 32 1,669 1,820 Shareholders’ capital 17,401 17,440 Junior perpetual capital securities 33 3,008 3,008 Perpetual cumulative subordinated bonds 33 454 454 Non-cumulative subordinated notes (Other equity instruments) 33 271 271 Fixed floating subordinated notes 34 695 695 Non-cumulative subordinated notes (Subordinated borrowings) 34 69 72 Trust pass-through securities 35 133 156 Currency revaluation other equity instruments 1) 40 340 Hybrid leverage 4,669 4,996 Senior debt 3) 39 2,312 2,414 Senior leverage 2,312 2,414 Total gross financial leverage 6,982 7,409 Total capitalization 24,383 24,849 Gross financial leverage ratio 28.6% 29.8% 1 Other equity instruments that are denominated in foreign currencies are, for purpose of calculating hybrid leverage, revalued to the period-end exchange rate. 2 Non-controlling interests are disclosed in the statement of financial position. 3 Senior debt for the gross financial leverage calculation also contains swaps for an amount of EUR 31 million (2016: EUR 28 million).
Schedule of Total Distributable Items	The following table shows the composition of the total distributable items: Distributable items 1) 2017 2016 Equity attributable to shareholders - based on IFRS as adopted by the EU 20,573 20,913 Not distributable items: Share capital (322 ) (319 ) Statutory reserves 2) (6,502 ) (8,598 ) At December 31 13,749 11,996 1 Distributable items under Dutch law; note that Solvency II ratio also possibly restricts the distribution of dividends. 2 Statutory reserves contains legal reserves FCTR, group companies and revaluation account consists of positive revaluations only.

Commitments and contingencies (

Commitments and contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Commitments through Purchase and Sale Transactions of Investments	2017 2016 Purchase Sale Purchase Sale Real estate 196 39 - 44 Mortgage loans 3,152 69 424 78 Private loans 705 - 44 - Other 2,373 - 1,314 -
Summary of Future Minimum Lease Payments under Non-cancellable Operating Leases	Future lease payments 2017 2016 Future lease payments Not later 1-5 years Later than 5 Not later 1-5 years Later than 5 Operating lease obligations 74 143 201 88 189 231 Operating lease rights 41 104 27 53 124 32
Summary of Other Commitments and Contingencies	Other commitments and contingencies 2017 2016 Guarantees 483 682 Standby letters of credit 12 29 Share of contingent liabilities incurred in relation to interests in joint ventures 39 40 Other guarantees 16 18 Other commitments and contingent liabilities 32 12

Offsetting, enforceable mast124

Offsetting, enforceable master netting arrangements and similar agreements (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Sumaary of Financial Instruments Set Off in Statement of Financial Position	The following table includes financial instruments that are set off in the statement of financial position. In addition, it includes financial instruments that are subject to a legally enforceable master netting arrangement or similar agreements, not set off in the financial statements. The table provides details relating to the effect, or potential effect, of netting arrangements, including rights to set-off, associated with the entity’s recognized financial assets and recognized financial liabilities. Gross amounts Gross amounts Net amounts of Related amounts not set off in position Net amount Financial assets subject to offsetting, enforceable master netting arrangements and similar agreements Financial Cash collateral received 2017 Derivatives 5,823 - 5,823 4,973 821 30 At December 31 5,823 - 5,823 4,973 821 30 2016 Derivatives 8,114 - 8,114 6,427 1,486 201 At December 31 8,114 - 8,114 6,427 1,486 201 Gross amounts Gross amounts Net amounts of Related amounts not set off in position Net amount Financial liabilities subject to offsetting, enforceable master netting arrangements and similar agreements Financial Cash collateral 2017 Derivatives 5,185 - 5,185 5,145 2 38 At December 31 5,185 - 5,185 5,145 2 38 2016 Derivatives 6,689 - 6,689 6,570 20 99 At December 31 6,689 - 6,689 6,570 20 99

Related party transactions (Tab

Related party transactions (Tables)	12 Months Ended
	Dec. 31, 2017
Text block1 [abstract]
Summary of Compensation and Various Related Expenses for members of Executive Board	Fixed compensation In EUR thousand 2017 2016 2015 Alex Wynaendts 1,269 1,269 1,154 Matt Rider 1) 560 - - Darryl Button - 933 991 Total fixed compensation 1,829 2,202 2,145 1 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Fixed compensation is disclosed for the period that Mr. Rider has been part of the Executive Board. The base salary of Mr Rider is EUR 900 thousand on an annualized basis. Conditional variable compensation awards In EUR thousand 2017 2016 2015 Alex Wynaendts 1,147 1,044 923 Matt Rider 1) 499 - - Darryl Button 2) - 747 784 Total conditional variable compensation awards 1,646 1,791 1,707 1 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Conditional variable compensation is disclosed for the period that Mr. Rider has been part of the Executive Board. 2 Mr. Button stepped down as CFO and member of Aegon’s Executive Board on December 1, 2016. Conditional variable compensation is disclosed for the period that Mr. Button has been part of the Executive Board and are reflective of his time with Aegon until December 1, 2016. Amounts are based on USD, converted to EUR, based on annual average exchange rates. Expenses recognized under IFRS accounting treatment in the income statement for Mr. Button for 2016 amount to EUR 1,237 (2015: EUR 995).
Detailed Information About Conditionally Awarded Cash And Shares of the Members of the Executive Board	The table below illustrates all the conditionally awarded cash and shares of the members of the Executive Board, and the years in which each component will be paid out and/or vest, subject to the conditions as mentioned: Conditional granted Timing of vesting, subject to targets and conditions Shares by reference period 2015 2016 2017 2018 2019 2020 2021 Alex Wynaendts 2007 9,253 8) - 9,253 - - - - - 2011 1) 17,304 17,304 - - - - - - 2012 2) 65,110 32,555 32,555 - - - - - 2013 3) 62,943 20,981 20,981 20,981 - - - - 2014 4) 67,761 27,105 13,552 13,552 13,552 - - - 2015 5) 75,549 - 30,219 15,110 15,110 15,110 - - 2016 6) 101,805 - - 40,722 20,361 20,361 20,361 - 2017 7) 109,330 - - - 43,732 21,866 21,866 21,866 Total number of shares 9) 509,055 97,945 106,560 90,365 92,755 57,337 42,227 21,866 Matt Rider 2017 7) 47,539 - - - 19,015 9,508 9,508 9,508 Total number of shares 9) 47,539 - - - 19,015 9,508 9,508 9,508 Darryl Button 2013 3) 28,716 9,572 9,572 9,572 - - - - 2014 4) 43,258 17,302 8,652 8,652 8,652 - - - 2015 5) 59,054 - 23,621 11,811 11,811 11,811 - - 2016 6) 74,038 - - 29,614 14,808 14,808 14,808 - 2017 7) - - - - - - - - Total number of shares 9) 205,066 26,874 41,845 59,649 35,271 26,619 14,808 - Jan J. Nooitgedagt 2011 1) 11,250 11,250 - - - - - - 2012 2) 44,740 22,370 22,370 - - - - - 2013 3) 26,478 8,826 8,826 8,826 - - - - Total number of shares 9) 82,468 42,446 31,196 8,826 - - - - Cash (in EUR) Alex Wynaendts 2011 81,795 81,795 - - - - - - 2012 203,536 101,768 101,768 - - - - - 2013 309,489 103,163 103,163 103,163 - - - - 2014 456,643 182,656 91,329 91,329 91,329 - - - 2015 461,305 - 184,522 92,261 92,261 92,261 - - 2016 522,060 - - 208,824 104,412 104,412 104,412 - 2017 573,550 - - - 229,420 114,710 114,710 114,710 Total cash 2,608,378 469,382 480,782 495,577 517,422 311,383 219,122 114,710 Matt Rider 2017 249,390 - - - 99,756 49,878 49,878 49,878 Total cash 249,390 - - - 99,756 49,878 49,878 49,878 CONTINUED > Conditional granted Timing of vesting, subject to targets and conditions Cash (in EUR) 2015 2016 2017 2018 2019 2020 2021 Darryl Button 2013 140,301 46,767 46,767 46,767 - - - - 2014 300,120 120,048 60,024 60,024 60,024 - - - 2015 392,155 - 156,862 78,431 78,431 78,431 - - 2016 373,369 - - 149,347 74,674 74,674 74,674 - 2017 - - - - - - - - Total cash 1,205,945 166,815 263,653 334,569 213,129 153,105 74,674 - Jan J. Nooitgedagt 2011 53,180 53,180 - - - - - - 2012 139,858 69,929 69,929 - - - - - 2013 130,188 43,396 43,396 43,396 - - - - Total cash 323,226 166,505 113,325 43,396 - - - - 1 The number of shares is based on a volume weighted average price of EUR 4.727. After vesting a 3 year holding period applies to shares vested. 2 The number of shares is based on a volume weighted average price of EUR 3.126. After vesting a 3 year holding period applies to shares vested. 3 The number of shares is based on a volume weighted average price of EUR 4.917. After vesting a 3 year holding period applies to shares vested. 4 The number of shares is based on a volume weighted average price of EUR 6.739. After vesting a 3 year holding period applies to shares vested. 5 The number of shares is based on a volume weighted average price of EUR 6.106. After vesting a 3 year holding period applies to shares vested. 6 The number of shares is based on a volume weighted average price of EUR 5.128 After vesting a 3 year holding period applies to shares vested. 7 The number of shares is based on a volume weighted average price of EUR 5.246 After vesting a 3 year holding period applies to shares vested. 8 During the vesting period, dividend payments on these shares are deposited in blocked savings accounts on behalf of the executive members. For active members of the Executive Board 50% of the shares vested in 2012 and 50% vested in 2016. 9 The shares that were allocated, vested with the acceptance of the Annual Accounts at the AGM in the year of vesting. The vesting price (in EUR) was: 7.2428 on 21 May 2015, 4.5020 on 20 May 2016, and 4.4230 on May 2017.
Information About Other Benefits	Other benefits In EUR thousand 2017 2016 2015 Alex Wynaendts 165 178 151 Matt Rider 1) 59 - - Darryl Button 2) - 739 528 Total other benefits 224 917 679 1 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Other benefits are disclosed for the period that Mr. Rider has been part of the Executive Board. 2 Mr. Button stepped down as CFO and member of Aegon’s Executive Board on December 1, 2016. Other benefits are disclosed for the period that Mr. Button has been part of the Executive Board and are reflective of his time with Aegon December 1, 2016. These benefits also included expenses related to his expatriation and commuter assignment from the United States to the Netherlands, borne by the Group.
Information About Pension Contributions	Pension contributions Pension contributions reflect the expenses related to the pension accrual over the financial year disclosed in the table, excluding back service charges. In EUR thousand 2017 2016 2015 Alex Wynaendts 1) 1,670 1,631 1,219 Matt Rider 2) 224 - - Darryl Button 3) - 375 215 Total pension contributions 1,894 2,006 1,434 1 The increase to the base pay of Mr. Wynaends, resulted in a backservice liability of EUR 1,361 in 2016 which is expensed over 2016-2019 (2016: EUR 416, 2017: EUR 432). 2 Mr. Rider was appointed as CFO and member of Aegon’s Executive Board per May 19, 2017. Pension contributions are disclosed for the period that Mr. Rider has been part of the Executive Board. 3 Mr. Button stepped down as CFO and member of Aegon’s Executive Board on December 1, 2016. Pension contributions are disclosed for the period that Mr. Button has been part of the Executive Board and are reflective of his time with Aegon until December 1, 2016. Expenses recognized under IFRS accounting treatment in the income statement for Mr. Button for 2016 amount to EUR 375 (2015: EUR 215)
Information About Remuneration retired Members of Supervisory Board	Remuneration of active and retired members of the Supervisory Board In EUR 2017 2016 2015 Robert J. Routs 134,000 140,000 143,000 William L. Connelly (as of May 19, 2017) 60,125 - - Robert W. Dineen 104,000 115,000 121,000 Mark A. Ellman (as of May 19, 2017) 70,125 - - Ben J. Noteboom (as of May 20, 2015) 101,500 109,000 69,250 Ben van der Veer 106,000 109,000 115,000 Dirk P.M. Verbeek 100,000 111,000 112,125 Corien M. Wortmann-Kool 100,750 90,000 96,000 Dona D. Young 115,500 113,000 121,000 Total for active members 892,000 787,000 777,375 Leo M. van Wijk (up to May 20, 2015) - - 38,625 Irving W. Bailey, II (up to May 20, 2016) - 53,625 135,000 Shemaya Levy (up to May 19, 2017) 40,375 95,250 101,000 Total remuneration 932,375 935,875 1,052,000 VAT liable on Supervisory Board remuneration 195,799 196,534 220,920 Total 1,128,174 1,132,409 1,272,920
Common shares held by Supervisory Board members	Common shares held by Supervisory Board members Shares held in Aegon at December 31 2017 2016 Robert W. Dineen 10,000 10,000 Ben J. Noteboom 23,500 23,500 Ben van der Veer 1,450 1,450 Dirk P.M. Verbeek 1,011 1,011 Dona D. Young 13,260 13,260 Total 49,221 49,221

Shares in group companies (Tabl

Shares in group companies (Tables)	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Summary of Shares in Group Companies	2017 2016 At January 1 22,219 23,992 Capital contributions and acquisitions 1,006 210 Divestments and capital repayments (698 ) (895 ) Dividend received (120 ) (181 ) Net income / (loss) for the financial year 2,511 533 Revaluations (1,799 ) (1,440 ) At December 31 23,117 22,219

Loans to group companies (Table

Loans to group companies (Tables)	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Summary of Loans to Group Companies	2017 2016 Loans to group companies – long-term At January 1 1,934 3,137 Additions / (repayments) (427 ) (1,248 ) Transfer to short term (829 ) - Other changes (239 ) 45 At December 31 439 1,934 Loans to group companies – short-term At January 1 2,189 1,392 Additions / (repayments) (563 ) 746 Transfer from long term 829 - Other changes (204 ) 51 At December 31 2,251 2,189 Total 2,690 4,123

Share capital (Tables)

Share capital (Tables) - Aegon N.V [member]	12 Months Ended
	Dec. 31, 2017
Detailed Information of Issued and outstanding Capital	Issued and outstanding capital 2017 2016 Common shares 251 249 Common shares B 70 70 Total share capital 322 319 Common shares 2017 2016 Authorized share capital 720 720 Number of authorized shares (in million) 6,000 6,000 Par value in cents per share 12 12 Common shares B 2017 2016 Authorized share capital 360 360 Number of authorized shares (in million) 3,000 3,000 Par value in cents per share 12 12
Movement of Common Shares	The following table shows the movement during the year in the number of common shares and common shares B: Common shares Common shares B Number of shares Total amount Number of shares Total amount At January 1, 2016 2,147,037 258 585,022 70 Dividend 10,629 1 - - Shares withdrawn (83,117 ) (10 ) - - At December 31, 2016 2,074,549 249 585,022 70 Dividend 21,099 3 - - At December 31, 2017 2,095,648 251 585,022 70 The following table shows the weighted average number of common shares and common shares B: Weighted Weighted 2016 2,129,074 585,022 2017 2,080,792 585,022

Long-term borrowings (Tables)

Long-term borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Summary of Long-term Borrowings	2017 2016 Remaining terms less than 1 year 500 500 Remaining terms 1 - 5 years 82 84 Remaining terms 5 - 10 years - - Remaining terms over 10 years 1,219 1,248 At December 31 1,801 1,832

Auditor's remuneration (Tables)

Auditor's remuneration (Tables)	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Summary of Accountants Remuneration	Total remuneration Accountants N.V. (NL) 2017 2016 2017 2016 Audit fees 42 27 13 9 Audit-related fees 3 3 1 1 Total 46 30 14 10

Proposal for profit appropri131

Proposal for profit appropriation (Tables)	12 Months Ended
	Dec. 31, 2017
Aegon N.V [member]
Summary of Proposal for Profit Appropriation	2017 2016 Final dividend on common shares 286 265 Earnings to be retained 2,183 172 Net income attributable to owners of Aegon N.V. 2,469 437

General Information - Additiona

General Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017EmployeesCountry	Dec. 31, 2016Employees	Dec. 31, 2015Employees
Disclosure of general information [Line Items]
Country of Incorporation	Netherlands
Address of entity	Aegonplein 50, 2591 TV, The Hague, the Netherlands
Description of nature operations and principal activities	Aegon N.V. (or 'the Company') and its subsidiaries ('Aegon' or 'the Group') have life insurance and pensions operations in more than 20 countries in the Americas, Europe and Asia and are also active in savings and asset management operations, accident and health insurance, general insurance and to a limited extent banking operations.
Name of parent entity	Aegon N.V.
Number of employees	28,318	29,380	31,530
Aegon N.V [member]
Disclosure of general information [Line Items]
Country of Incorporation	Netherlands
Address of entity	Aegonplein 50, 2591 TV, The Hague, the Netherlands
Description of nature operations and principal activities	Aegon N.V. (or 'the Company') and its subsidiaries ('Aegon' or 'the Group') have life insurance and pensions operations in more than 20 countries in the Americas, Europe and Asia and are also active in savings and asset management operations.
Name of parent entity	Aegon N.V.
Number of employees	0	0
Domicile of entity	Netherlands
Bottom of range [member]
Disclosure of general information [Line Items]
Number of business operating countries | Country	20
Number of employees	28,000	29,000
Bottom of range [member] | Aegon N.V [member]
Disclosure of general information [Line Items]
Number of business operating countries | Country	20
Number of employees	28,000	29,000

Summary of Significant Accou133

Summary of Significant Accounting Policies - Summary of Reconciliation Between IFRS and IFRS-EU (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure of changes in accounting estimates [line items]
Equity	€ 24,102	€ 24,341	€ 26,250	€ 27,683
Shareholders' equity, adjustment of EU 'IAS 39' carve-out	368	510	315
Shareholders' equity, tax effect of the adjustment	(83)	(117)	(71)
Shareholders' equity, effect of the adjustment after tax	285	393	244
Net income, adjustment of EU 'IAS 39' carve-out	(142)	195	(120)
Net income, tax effect of the adjustment	34	(47)	27
Net income, effect of the adjustment after tax	(108)	149	(92)
In accordance with IFRS [member]
Disclosure of changes in accounting estimates [line items]
Equity	20,288	20,520	22,441
Net income	2,469	438	(431)
In accordance with IFR5-EU [member]
Disclosure of changes in accounting estimates [line items]
Equity	20,573	20,913	22,684
Net income	€ 2,361	€ 586	€ (523)

Summary of Significant Accou134

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017EUR (€)
Disclosure of changes in accounting policies [Abstract]
Temporary exemption eligible liability carrying value over total liabilities carrying value	In order for an entity to be eligible for the temporary exemption it must have liabilities connected with insurance activities whose carrying value comprises either greater than 90% of the total carrying value of all liabilities or less than or equal to 90% but greater than 80%, and the insurer does not have significant activities unrelated to insurance. Aegon performed this analysis, and concluded that it meets the requirements for the temporary exception. As a result, Aegon will not implement IFRS 9 until January 1, 2021.
Description of hedging relationship considered highly effective	A hedging relationship is considered highly effective if the results of the hedging instrument are within a ratio of 80% to 125% of the results of the hedged item.
Impairment of available-for-sale equity instruments, significant or prolonged decline, description	Significant or prolonged decline is defined as an unrealized loss position for generally more than six months or a fair value of less than 80% of the cost price of the investment.
Threshold period for investment in equity securities in a continuous decline in value to be considered	More than six months
Threshold percentage by which investments in equity securities have declined in value to be considered	80.00%
Gain or loss is recognized in on purchase, sale, issue or cancellation of instruments	€ 0

Critical Accounting Estimate135

Critical Accounting Estimates and Judgment in Applying Accounting Policies - Additional Information (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of changes in accounting estimates [line items]
Increase decrease in earning before tax due to actuarial assumption and model updates	€ 276,000,000	€ 118,000,000
Uniform grading period	10 years
Description of voluntary changes	For the years 2015 through 2017, Aegon kept its long-term equity market return assumption for the estimated gross profits on variable life and variable annuity products in the Americas at 8%. During the three year period, the long-term assumption for 10- year US Treasury yields was 4.25% and the uniform grading period was 10 years. The long term credit spread assumption on our most common corporate bonds is 114bps. The 90-day Treasury yield was 1.39%, 0.51% and 0.16% at December 31, 2017, 2016 and 2015, respectively. During 2016 and 2017 the 90-day Treasury yield was assumed to have a uniform grading over 10 years to 2.5%. In 2015, the 90-day Treasury yield was assumed to remain level for six months followed by a 9.5 year grade to 2.5%. On a quarterly basis, the estimated gross profits are updated for the difference between the estimated market return and the actual market return.
Percentage of increase in mortality assumption	10.00%
Decrease in net income due to increase of mortality assumption	€ 265,000,000	223,000,000
Percentage of increase in the lapse rate assumption	20.00%
Increase in net income due to increase in lapse rate assumptions	€ 78,000,000	60,000,000
Aegon N.V [member]
Disclosure of changes in accounting estimates [line items]
Decrease in net income due to possible changes in other assumptions	€ 15,000,000	€ 12,000,000
9.5 year grading [member]
Disclosure of changes in accounting estimates [line items]
Percentage of rate of return			2.50%
10-year US treasury yields [member]
Disclosure of changes in accounting estimates [line items]
Percentage of rate of return	4.25%
Bonds [member]
Disclosure of changes in accounting estimates [line items]
Long term credit spread assumption	1.14%
90-day treasury yield [member]
Disclosure of changes in accounting estimates [line items]
Percentage of rate of return	1.39%	0.51%	0.16%
90-day treasury yield [member] | Grading over 10 years [member]
Disclosure of changes in accounting estimates [line items]
Percentage of rate of return	2.50%	2.50%
Americas [member]
Disclosure of changes in accounting estimates [line items]
Percentage of long-term equity market return assumption	8.00%
United States [member]
Disclosure of changes in accounting estimates [line items]
Percentage of decrease in expected long-term equity growth rate	1.00%
Decrease in DPAC and VOBA balances and reserve	€ 130,000,000	€ 158,000,000
DPAC and VOBA balance	€ 2,700,000,000	€ 3,000,000,000

Financial Risks - Summary of In

Financial Risks - Summary of Information on Three Year Historical Net Income (Loss) and Shareholders' Equity (Detail) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2017GBP (£)	Dec. 31, 2016USD ($)	Dec. 31, 2016EUR (€)	Dec. 31, 2016GBP (£)	Dec. 31, 2015USD ($)	Dec. 31, 2015EUR (€)	Dec. 31, 2015GBP (£)
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss)		€ 2,469			€ 438			€ (431)
Americas [member]
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss) | $	$ 1,762			$ 618			$ (261)
Equity in functional currency | $	17,712			17,103			17,609
The Netherlands [member]
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss)		818			418			753
Equity in functional currency		6,558			5,101			5,263
United Kingdom [member]
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss) | £			£ 71			£ (346)			£ (674)
Equity in functional currency | £			£ 1,905			£ 1,845			£ 2,981
Central & Eastern Europe [member]
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss)		57			19			24
Equity in functional currency		402			378			396
Spain & Portugal [member]
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss)		(2)			(2)			22
Equity in functional currency		433			451			464
Asia [member]
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss) | $	6			(14)			(33)
Equity in functional currency | $	$ 1,169			$ 1,281			$ 674
Asset management [member]
Disclosure of historical net income (loss) and shareholders' equity [line items]
Net income / (loss)		48			97			121
Equity in functional currency		€ 397			€ 422			€ 444

Financial Risks - Summary of Ex

Financial Risks - Summary of Exchange Rates of US Dollar and UK Pound per Euro (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
USD [member]
Disclosure of foreign exchange rates [line items]
Closing rates	1.20	1.05	1.09	1.21	1.38
GBP [member]
Disclosure of foreign exchange rates [line items]
Closing rates	0.89	0.85	0.74	0.78	0.83

Financial Risks - Schedule of S

Financial Risks - Schedule of Sensitivity Analysis of Net Income and Shareholders' Equity (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Increase by fifteen percentage of USD currencies relative to Euro [member]
Disclosure of sensitivity analysis related to translation risk [line items]
Estimated approximate effects on net income	€ 260	€ 87
Estimated approximate effects on shareholders' equity	2,159	2,179
Increase by fifteen percentage of GBP currencies relative to Euro [member]
Disclosure of sensitivity analysis related to translation risk [line items]
Estimated approximate effects on net income	21	(3)
Estimated approximate effects on shareholders' equity	321	259
Increase by Fifteen percentage of non Euro currencies relative to Euro [member]
Disclosure of sensitivity analysis related to translation risk [line items]
Estimated approximate effects on net income	265	79
Estimated approximate effects on shareholders' equity	2,598	2,537
Decrease by fifteen percentage of USD currencies relative to Euro [member]
Disclosure of sensitivity analysis related to translation risk [line items]
Estimated approximate effects on net income	(189)	(61)
Estimated approximate effects on shareholders' equity	(1,566)	(1,558)
Decrease by fifteen percentage of GBP currencies relative to Euro [member]
Disclosure of sensitivity analysis related to translation risk [line items]
Estimated approximate effects on net income	(16)	(55)
Estimated approximate effects on shareholders' equity	(216)	(170)
Decrease by fifteen percentage of non Euro currencies relative to Euro [member]
Disclosure of sensitivity analysis related to translation risk [line items]
Estimated approximate effects on net income	(184)	(110)
Estimated approximate effects on shareholders' equity	€ (1,868)	€ (1,794)

Financial Risks - Schedule of I

Financial Risks - Schedule of Interest Rate Risk (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
3-month US LIBOR [member]
Disclosure of interest rates [line items]
Interest rate	1.69%	1.00%	0.61%	0.26%	0.25%
3-month EURIBOR [member]
Disclosure of interest rates [line items]
Interest rate	(0.33%)	(0.32%)	(0.13%)	0.08%	0.29%
10-year US treasury [member]
Disclosure of interest rates [line items]
Interest rate	2.41%	2.43%	2.27%	2.17%	3.03%
10-year Dutch government [member]
Disclosure of interest rates [line items]
Interest rate	0.53%	0.35%	0.79%	0.68%	2.23%

Financial Risks - Schedule of P

Financial Risks - Schedule of Parallel Movement of Yield Curve (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Shift up 100 basis points [member]
Effect of changes in foreign interest rates [line items]
Estimated approximate effects on net income	€ (282)	€ 364
Estimated approximate effects on shareholders' equity	(2,620)	(2,257)
Shift down 100 basis points [member]
Effect of changes in foreign interest rates [line items]
Estimated approximate effects on net income	200	(300)
Estimated approximate effects on shareholders' equity	€ 2,160	€ 2,020

Financial Risks - Schedule of M

Financial Risks - Schedule of Maximum Exposure to Credit Risk (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of credit risk exposure [line items]
Master netting agreements collateral	€ 30	€ 201
Credit risk [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	157,869	172,113
Cash collateral	3,163	3,992
Securities collateral	5,171	6,287
Letters of credit /guarantees collateral	801	1,322
Real estate property collateral	49,756	49,448
Master netting agreements collateral	4,867	5,841
Other collateral	1,886	2,197
Total collateral	65,644	69,087
Surplus collateral	20,576	20,598
Net exposure	112,800	123,623
Credit risk [member] | Debt securities - carried at fair value [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	84,344	103,169
Letters of credit /guarantees collateral	242	392
Total collateral	242	392
Net exposure	84,102	102,777
Credit risk [member] | Debt securities - carried at amortized cost [Member]
Disclosure of credit risk exposure [line items]
Letters of credit /guarantees collateral	14
Total collateral	14
Net exposure	(14)
Credit risk [member] | Money market and other short-term investments - carried at fair value [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	6,809	7,093
Securities collateral	719	815
Total collateral	719	815
Surplus collateral	25	27
Net exposure	6,115	6,306
Credit risk [member] | Mortgage loans - carried at amortized cost [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	33,562	33,696
Cash collateral	2,437	2,319
Letters of credit /guarantees collateral	379	760
Real estate property collateral	49,756	49,448
Total collateral	52,573	52,527
Surplus collateral	19,271	19,198
Net exposure	260	366
Credit risk [member] | Private loans - held at amortized cost [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	3,642	3,166
Cash collateral	79	67
Total collateral	79	67
Net exposure	3,563	3,099
Credit risk [member] | Other loans - held at amortized cost [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	2,164	2,441
Other collateral	1,886	2,197
Total collateral	1,886	2,197
Surplus collateral	1,195	1,326
Net exposure	1,473	1,570
Credit risk [member] | Other financial assets - carried at fair value [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	2,586	3,425
Net exposure	2,586	3,425
Credit risk [member] | Derivatives [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	5,563	7,916
Cash collateral	647	1,606
Securities collateral	56	407
Letters of credit /guarantees collateral	29
Master netting agreements collateral	4,867	5,841
Total collateral	5,599	7,855
Surplus collateral	85	47
Net exposure	48	109
Credit risk [member] | Reinsurance assets [member]
Disclosure of credit risk exposure [line items]
Maximum exposure to credit risk	19,200	11,206
Securities collateral	4,395	5,064
Letters of credit /guarantees collateral	137	171
Total collateral	4,532	5,235
Net exposure	€ 14,667	€ 5,971

Financial Risks - Additional In

Financial Risks - Additional Information (Detail) Securities in Millions	12 Months Ended
	Dec. 31, 2017EUR (€)IssuerViolationDelinquencySecuritiesCounterparty	Dec. 31, 2016EUR (€)ViolationSecurities
Disclosure of financial risk management [line items]
For NHG backed mortgage loans, lender-incurred haircut applied on realized losses on each defaulted loan	10.00%
Number of defaults with derivativies counterparty for last three years | Counterparty	0
Number of violation of credit name limit policy at group level | Violation	0	2
Fair value of financial assets	€ 139,711,000,000	€ 159,510,000,000
Increased fed funds rate	0.25%
Fed funds rate	0.50%
Maximum value of unrealized loss disclosed separately	€ 25,000,000
Securities available-for-sale	88,170,000,000	109,860,000,000
Financial assets at fair value through profit or loss	7,119,000,000	5,142,000,000
Subordinated securities	764,000,000	767,000,000
Net impairments and (recoveries)	0	11,000,000
Recoveries on previously impaired assets	€ 16,000,000	€ 42,000,000
Number of securities issued by Cobank having unrealised loss above EUR 5 million | Securities	1	1
Amount held in general account investment readily redeemable and saleable	€ 34,393,000,000	€ 35,841,000,000
Undrawn committed borrowing facilities	3,367,000,000	3,885,000,000
Equity portfolio [member]
Disclosure of financial risk management [line items]
Gross unrealized gain (AFS)	62,000,000	202,000,000
Gross unrealized loss	€ 13,000,000	13,000,000
Government [member]
Disclosure of financial risk management [line items]
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million | Issuer	0
Investment grade [member]
Disclosure of financial risk management [line items]
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million	0
Corporate financial banking sub sector [member]
Disclosure of financial risk management [line items]
Subordinated securities	€ 629,000,000	750,000,000
Unrealized loss on subordinated securities	10,000,000	93,000,000
Asset backed securities [member]
Disclosure of financial risk management [line items]
Fair value of financial assets	4,314,000,000	6,188,000,000
Aegon US, NL and UK [member]
Disclosure of financial risk management [line items]
Gross unrealized gain (AFS)	6,665,000,000	7,739,000,000
Gross unrealized losses AFS debt securities	464,000,000	1,217,000,000
Gross unrealized loss	13,000,000	13,000,000
Aegon US, NL and UK [member] | Asset backed securities [member]
Disclosure of financial risk management [line items]
Fair value of financial assets	4,314,000,000	6,188,000,000
Gross unrealized losses ABS	15,000,000	54,000,000
Aegon Americas [member] | Asset backed securities [member]
Disclosure of financial risk management [line items]
Fair value of financial assets	2,429,000,000	3,377,000,000
Financial assets at fair value through profit or loss	10,000,000	13,000,000
Gross unrealized loss	12,000,000	44,000,000
Aegon Netherlands [member] | Asset backed securities [member]
Disclosure of financial risk management [line items]
Fair value of financial assets	1,799,000,000	2,714,000,000
Gross unrealized loss	2,000,000	10,000,000
Aegon United Kingdom [member] | Asset backed securities [member]
Disclosure of financial risk management [line items]
Fair value of financial assets	88,000,000	97,000,000
Aegon US, NL and UK [member]
Disclosure of financial risk management [line items]
Impairment release	€ 2,000,000	1,000,000
Belfius bank SA [member]
Disclosure of financial risk management [line items]
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million | Issuer	0
Residential mortgage- backed securities [member]
Disclosure of financial risk management [line items]
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million	0
Residential mortgage- backed securities [member] | Aegon Americas [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	€ 2,985,000,000	3,494,000,000
Financial assets at fair value through profit or loss	40,000,000	89,000,000
Gross unrealized loss on available-for-sale securities	29,000,000	78,000,000
Net unrealized gains on securities	268,000,000	199,000,000
Residential mortgage- backed securities [member] | Aegon US, NL and UK [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	3,557,000,000	4,162,000,000
Gross unrealized losses RMBS	30,000,000	83,000,000
Net unrealized gains on securities	284,000,000	210,000,000
Residential mortgage- backed securities [member] | Aegon Netherlands [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	556,000,000	649,000,000
Residential mortgage- backed securities [member] | Aegon United Kingdom [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	17,000,000	19,000,000
Commercial mortgage- backed securities (CMBSs) [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	3,549,000,000	5,579,000,000
Net unrealized gains on securities	€ 81,000,000	87,000,000
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million	0
Commercial mortgage- backed securities (CMBSs) [member] | Aegon Americas [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	€ 3,375,000,000	5,340,000,000
Financial assets at fair value through profit or loss	0	0
Net unrealized gains on securities	36,000,000	34,000,000
Gross unrealized losses CMBS	22,000,000	67,000,000
Commercial mortgage- backed securities (CMBSs) [member] | Aegon Netherlands [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	28,000,000	44,000,000
Commercial mortgage- backed securities (CMBSs) [member] | Aegon United Kingdom [member]
Disclosure of financial risk management [line items]
Securities available-for-sale	146,000,000	195,000,000
Net unrealized gains on securities	€ 44,000,000
Asset backed securities [member]
Disclosure of financial risk management [line items]
Individual issuers rated below investment grade which have unrealised position greater than EUR 25 million	0
Available for sale bonds [member] | Aegon US, NL and UK [member] | Corporate financial banking sub sector [member]
Disclosure of financial risk management [line items]
Available for sale bonds issued	€ 6,793,000,000	8,527,000,000
Gross unrealized losses Corporate Financial Banking Sub Sector	39,000,000	135,000,000
Net unrealized gain	323,000,000	188,000,000
Monoline insurers [member] | Aegon Americas [member] | Asia Portfolios [Member]
Disclosure of financial risk management [line items]
Letters of credit /guarantees collateral	€ 264,000,000	€ 413,000,000
Monoline insurers [member] | Municipal Bond Insurance Association, Inc. [member]
Disclosure of financial risk management [line items]
Percentage of Indirect Exposure	31.00%	37.00%
Monoline insurers [member] | Ambac Financial Group, Inc. [member]
Disclosure of financial risk management [line items]
Percentage of Indirect Exposure	13.00%	14.00%
Monoline insurers [member] | Assured Guaranty Corporation [member]
Disclosure of financial risk management [line items]
Percentage of Indirect Exposure	43.00%	39.00%
Americas commercial and agricultural mortgage loan portfolio [member]
Disclosure of financial risk management [line items]
Fair value of financial assets	€ 7,132,000,000	€ 8,789,000,000
Percentage of loan to value	55.00%	54.00%
Assumed defaults rate on delinquent loans	0.06%	0.00%
Delinquency days (defined as 60 days in arrears) | Delinquency	0
Impairment release	€ 19,000,000	€ 0
Recoveries of real estate loan	0	15,000,000
Additional impairment of financial assets net of recoveries	200,000	2,000,000
Netherlands Mortgage Loan Portfolio [member]
Disclosure of financial risk management [line items]
Fair value of financial assets	€ 30,926,000,000	€ 29,479,000,000
Percentage of loan to value	76.00%	83.00%
Assumed defaults rate on delinquent loans	0.20%	0.40%
Delinquency days (defined as 60 days in arrears) | Delinquency	0
Impairment release	€ 8,000,000	€ 5,000,000
Percentage of loan portfolio guaranteed by government	51.00%	57.00%
Percentage of average default of portfolio	0.05%
Bottom of range [member]
Disclosure of financial risk management [line items]
Percentage of total unrealized loss position representing two issuers	4.00%
Purchase program	€ 30,000,000,000
Gross unrealized loss	5,000,000	€ 5,000,000
Net impairments and (recoveries)	€ 25,000,000
Unrealized loss position period	6 months
Bottom of range [member] | Government bonds [member]
Disclosure of financial risk management [line items]
Unrealized loss positions	€ 25,000,000
Bottom of range [member] | Below investment grade [member]
Disclosure of financial risk management [line items]
Unrealized loss	€ 25,000,000
Bottom of range [member] | Aegon Americas [member]
Disclosure of financial risk management [line items]
Assumed defaults rate on delinquent loans	51.00%
Prepayment assumptions	0.00%
Percentage of loss severity assumption	24.00%
Bottom of range [member] | Belfius bank SA [member]
Disclosure of financial risk management [line items]
Gross unrealized loss	€ 25,000,000
Bottom of range [member] | Residential mortgage- backed securities [member]
Disclosure of financial risk management [line items]
Unrealized loss	25,000,000
Bottom of range [member] | Commercial mortgage- backed securities (CMBSs) [member]
Disclosure of financial risk management [line items]
Unrealized loss	25,000,000
Bottom of range [member] | Asset backed securities [member]
Disclosure of financial risk management [line items]
Unrealized loss	25,000,000
Top of range [member]
Disclosure of financial risk management [line items]
Purchase program	€ 60,000,000,000
Rate of fair value of investment	Significant or prolonged decline is generally defined within Aegon as an unrealized loss position for more than six months or a fair value of less than 80% of the cost price of the investment
Top of range [member] | Aegon Americas [member]
Disclosure of financial risk management [line items]
Assumed defaults rate on delinquent loans	88.00%
Prepayment assumptions	29.00%
Percentage of loss severity assumption	75.00%
Weighted average [member] | Aegon Americas [member]
Disclosure of financial risk management [line items]
Assumed defaults rate on delinquent loans	77.60%	79.40%
Prepayment assumptions	5.50%	4.60%
Assumed defaults rate on current loans	58.30%	57.60%

Financial Risks - Summary of Gr

Financial Risks - Summary of Group Limits Per Credit Rating (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
AAA [member]
Disclosure of group limits per credit rating [line items]
Group limits per credit rating	€ 900	€ 900
AA [member]
Disclosure of group limits per credit rating [line items]
Group limits per credit rating	900	900
A [member]
Disclosure of group limits per credit rating [line items]
Group limits per credit rating	675	675
BBB [member]
Disclosure of group limits per credit rating [line items]
Group limits per credit rating	450	450
BB [member]
Disclosure of group limits per credit rating [line items]
Group limits per credit rating	250	250
B [member]
Disclosure of group limits per credit rating [line items]
Group limits per credit rating	125	125
CCC or lower [member]
Disclosure of group limits per credit rating [line items]
Group limits per credit rating	€ 50	€ 50

Financial Risks - Schedule of R

Financial Risks - Schedule of Ratings Distribution of General Account Portfolios (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about credit rating [line items]
Fair value	€ 139,711	€ 159,510
Total carrying value	134,658	154,304
Credit rating general account investments, excluding reinsurance assets [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	39,368	39,303
Fair value	100,853	122,918
Total carrying value	140,221	162,221
Credit rating general account investments, excluding reinsurance assets [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	2,616	3,189
Fair value	32,960	35,758
Total carrying value	35,575	38,946
Credit rating general account investments, excluding reinsurance assets [member] | AA [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	2,778	3,300
Fair value	10,334	13,731
Total carrying value	13,111	17,032
Credit rating general account investments, excluding reinsurance assets [member] | A [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	3,024	3,349
Fair value	24,399	31,204
Total carrying value	27,423	34,553
Credit rating general account investments, excluding reinsurance assets [member] | BBB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	1,271	1,346
Fair value	20,983	26,721
Total carrying value	22,254	28,067
Credit rating general account investments, excluding reinsurance assets [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	107	145
Fair value	1,852	2,391
Total carrying value	1,959	2,536
Credit rating general account investments, excluding reinsurance assets [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	2	5
Fair value	1,284	1,279
Total carrying value	1,287	1,284
Credit rating general account investments, excluding reinsurance assets [member] | CCC or lower [member]
Disclosure of detailed information about credit rating [line items]
Fair value	823	1,078
Total carrying value	823	1,078
Credit rating general account investments, excluding reinsurance assets [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	29,154	27,460
Fair value	7,011	9,267
Total carrying value	36,165	36,727
Credit rating general account investments, excluding reinsurance assets [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	38,951	38,793
Fair value	99,645	121,429
Total carrying value	138,597	160,222
Credit rating general account investments, excluding reinsurance assets [member] | Financial assets past due and or impaired assets [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	416	510
Fair value	1,207	1,489
Total carrying value	1,624	1,999
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	6	18
Fair value	5,320	5,310
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	985	950
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | AA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	340	402
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | A [member]
Disclosure of detailed information about credit rating [line items]
Fair value	1,775	1,823
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | BBB [member]
Disclosure of detailed information about credit rating [line items]
Fair value	1,920	1,904
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Fair value	140	132
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Fair value	117	57
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | CCC or lower [member]
Disclosure of detailed information about credit rating [line items]
Fair value	23	28
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	6	18
Fair value	1
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	6	18
Fair value	5,300	5,297
Credit rating general account investments, excluding reinsurance assets [member] | Asia [member] | Financial assets past due and or impaired assets [member]
Disclosure of detailed information about credit rating [line items]
Fair value	20	13
Credit rating general account investments, excluding reinsurance assets [member] | Asset management [member]
Disclosure of detailed information about credit rating [line items]
Fair value	157	90
Credit rating general account investments, excluding reinsurance assets [member] | Asset management [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	144
Credit rating general account investments, excluding reinsurance assets [member] | Asset management [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Fair value	1
Credit rating general account investments, excluding reinsurance assets [member] | Asset management [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Fair value	4
Credit rating general account investments, excluding reinsurance assets [member] | Asset management [member] | CCC or lower [member]
Disclosure of detailed information about credit rating [line items]
Fair value	4
Credit rating general account investments, excluding reinsurance assets [member] | Asset management [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Fair value	4	90
Credit rating general account investments, excluding reinsurance assets [member] | Asset management [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Fair value	157	90
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	8,831	10,820
Fair value	65,259	83,755
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	958	1,560
Fair value	18,935	21,580
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | AA [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	2,693	3,214
Fair value	3,353	6,102
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | A [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	2,905	3,281
Fair value	18,684	25,147
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | BBB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	330	481
Fair value	16,822	21,461
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	18	70
Fair value	1,567	1,964
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Fair value	1,162	1,207
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | CCC or lower [member]
Disclosure of detailed information about credit rating [line items]
Fair value	793	1,049
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	1,892	2,196
Fair value	2,797	3,847
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	8,796	10,802
Fair value	64,114	82,357
Credit rating general account investments, excluding reinsurance assets [member] | Americas [member] | Financial assets past due and or impaired assets [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	35	17
Fair value	1,145	1,397
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	30,189	28,117
Fair value	26,467	29,817
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	1,658	1,628
Fair value	12,727	13,020
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | AA [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	85	86
Fair value	5,449	6,011
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | A [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	56	12
Fair value	3,186	3,397
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | BBB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	941	850
Fair value	1,267	2,402
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	18	18
Fair value	22	107
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Fair value		10
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | CCC or lower [member]
Disclosure of detailed information about credit rating [line items]
Fair value	3
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	27,133	25,133
Fair value	3,770	4,792
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	29,890	27,727
Fair value	26,425	29,740
Credit rating general account investments, excluding reinsurance assets [member] | The Netherlands [member] | Financial assets past due and or impaired assets [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	299	390
Fair value	41	77
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member]
Disclosure of detailed information about credit rating [line items]
Fair value	2,031	2,269
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	137	171
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | AA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	1,139	1,158
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | A [member]
Disclosure of detailed information about credit rating [line items]
Fair value	449	549
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | BBB [member]
Disclosure of detailed information about credit rating [line items]
Fair value	78	85
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Fair value	9	90
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Fair value		2
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Fair value	219	215
Credit rating general account investments, excluding reinsurance assets [member] | United Kingdom [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Fair value	2,031	2,269
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	275	303
Fair value	777	678
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	1	2
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | AA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	5	1
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | A [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	8	8
Fair value	126	116
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | BBB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	3	20
Fair value	495	433
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	72	56
Fair value	92	80
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	2	4
Fair value	1	1
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	107	111
Fair value	55	44
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	193	201
Fair value	775	676
Credit rating general account investments, excluding reinsurance assets [member] | Central & Eastern Europe [member] | Financial assets past due and or impaired assets [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	82	102
Fair value	1	2
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	54	45
Fair value	651	687
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | AAA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	9	12
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | AA [member]
Disclosure of detailed information about credit rating [line items]
Fair value	48	58
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | A [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	55	48
Fair value	167	157
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | BBB [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	(3)	(6)
Fair value	401	436
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | BB [member]
Disclosure of detailed information about credit rating [line items]
Fair value	20	18
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | B [member]
Disclosure of detailed information about credit rating [line items]
Fair value		3
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | Assets not rated [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	2	3
Fair value	6	3
Credit rating general account investments, excluding reinsurance assets [member] | Spain & Portugal [member] | Credit rating general account investments [member]
Disclosure of detailed information about credit rating [line items]
Amortized cost	54	45
Fair value	€ 651	€ 687

Financial Risks - Disclosure of

Financial Risks - Disclosure of Foreign Exchange Rates (Detail) - Carrying value [member] - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about credit rating [line items]
Rated credit exposures	€ 19,200	€ 11,206
AAA [member]
Disclosure of detailed information about credit rating [line items]
Rated credit exposures		7
AA [member]
Disclosure of detailed information about credit rating [line items]
Rated credit exposures	13,379	7,724
A [member]
Disclosure of detailed information about credit rating [line items]
Rated credit exposures	5,242	3,120
Below A [member]
Disclosure of detailed information about credit rating [line items]
Rated credit exposures	24	18
Not rated [member]
Disclosure of detailed information about credit rating [line items]
Rated credit exposures	€ 555	€ 338

Financial Risks - Schedule of C

Financial Risks - Schedule of Credit Risk Concentration - Debt Securities and Money Market Investments (Detail) - Debt securities and money market investments [member] - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of credit risk exposure [line items]
Credit risk concentrations	€ 91,153	€ 110,262
Residential mortgage- backed securities (RMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3,655	4,331
Commercial mortgage- backed securities (CMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	4,086	6,155
Asset backed securities [member] | Collateralized debt obligations 1 [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	2,327	3,532
Asset backed securities [member] | Credit risk [member] | Other securities [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	2,378	3,072
Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	9,026	10,785
Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	10,069	11,588
Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	26,435	35,020
Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3,927	5,490
Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	29,249	30,289
Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	61,073	77,730
Americas [member] | Residential mortgage- backed securities (RMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3,025	3,583
Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3,375	5,340
Americas [member] | Asset backed securities [member] | Collateralized debt obligations 1 [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	751	1,066
Americas [member] | Asset backed securities [member] | Credit risk [member] | Other securities [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,688	2,324
Americas [member] | Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	6,525	8,457
Americas [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	9,028	10,487
Americas [member] | Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	21,975	29,364
Americas [member] | Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3,386	4,704
Americas [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	11,319	12,406
The Netherlands [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	21,411	23,741
The Netherlands [member] | Residential mortgage- backed securities (RMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	556	649
The Netherlands [member] | Commercial mortgage- backed securities (CMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	28	44
The Netherlands [member] | Asset backed securities [member] | Collateralized debt obligations 1 [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,529	2,437
The Netherlands [member] | Asset backed securities [member] | Credit risk [member] | Other securities [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	270	276
The Netherlands [member] | Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,440	1,194
The Netherlands [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	212	282
The Netherlands [member] | Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,726	2,824
The Netherlands [member] | Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	119	392
The Netherlands [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	15,531	15,642
United Kingdom [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,812	2,054
United Kingdom [member] | Residential mortgage- backed securities (RMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	17	19
United Kingdom [member] | Commercial mortgage- backed securities (CMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	146	195
United Kingdom [member] | Asset backed securities [member] | Credit risk [member] | Other securities [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	88	97
United Kingdom [member] | Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	124	157
United Kingdom [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	58	118
United Kingdom [member] | Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	255	332
United Kingdom [member] | Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	65	67
United Kingdom [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,060	1,068
Central & Eastern Europe [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	718	636
Central & Eastern Europe [member] | Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	102	67
Central & Eastern Europe [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3	6
Central & Eastern Europe [member] | Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	7	7
Central & Eastern Europe [member] | Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3	3
Central & Eastern Europe [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	603	553
Spain & Portugal [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	646	683
Spain & Portugal [member] | Asset backed securities [member] | Credit risk [member] | Other securities [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1	1
Spain & Portugal [member] | Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	104	110
Spain & Portugal [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	114	120
Spain & Portugal [member] | Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	129	126
Spain & Portugal [member] | Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	45	43
Spain & Portugal [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	253	282
Asia [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	5,319	5,310
Asia [member] | Residential mortgage- backed securities (RMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	57	80
Asia [member] | Commercial mortgage- backed securities (CMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	537	576
Asia [member] | Asset backed securities [member] | Collateralized debt obligations 1 [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	47	29
Asia [member] | Asset backed securities [member] | Credit risk [member] | Other securities [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	331	373
Asia [member] | Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	730	800
Asia [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	498	465
Asia [member] | Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	2,344	2,367
Asia [member] | Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	309	280
Asia [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	466	339
Asset management [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	153	87
Asset management [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	137	87
Asset management [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	17
Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,154	1,399
Past due and impaired [member] | Residential mortgage- backed securities (RMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,022	1,267
Past due and impaired [member] | Commercial mortgage- backed securities (CMBSs) [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	10	8
Past due and impaired [member] | Asset backed securities [member] | Collateralized debt obligations 1 [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3	7
Past due and impaired [member] | Asset backed securities [member] | Credit risk [member] | Other securities [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	35	36
Past due and impaired [member] | Financial - Banking [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3	4
Past due and impaired [member] | Financial - other [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	4
Past due and impaired [member] | Industrial [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	62	65
Past due and impaired [member] | Utility [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations		7
Past due and impaired [member] | Government bonds [member] | Credit risk [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	€ 14	€ 4

Financial Risks - Schedule o147

Financial Risks - Schedule of Credit Risk Concentration - Government Bonds (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
United States government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	€ 10,906	€ 12,060
Netherlands government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	5,781	5,378
United Kingdom government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	964	949
Austria government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,158	1,175
Belgium government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,094	1,151
Finland government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	938	935
France government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,255	1,397
Germany government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	4,261	4,167
Hungary government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	405	364
Luxembourg government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	786	876
Spain government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	294	335
Rest of Europe government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	568	808
Rest of world government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	809	654
Supranational government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	30	40
Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	29,249	30,289
Americas [member] | United States government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	10,501	11,738
Americas [member] | Hungary government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3	4
Americas [member] | Rest of Europe government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	133	118
Americas [member] | Rest of world government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	652	506
Americas [member] | Supranational government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	30	40
Americas [member] | Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	11,319	12,406
The Netherlands [member] | United States government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	32	22
The Netherlands [member] | Netherlands government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	5,777	5,374
The Netherlands [member] | Austria government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,154	1,171
The Netherlands [member] | Belgium government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,065	1,119
The Netherlands [member] | Finland government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	938	935
The Netherlands [member] | France government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,216	1,356
The Netherlands [member] | Germany government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	4,233	4,138
The Netherlands [member] | Luxembourg government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	785	872
The Netherlands [member] | Spain government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	89	112
The Netherlands [member] | Rest of Europe government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	205	484
The Netherlands [member] | Rest of world government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	36	59
The Netherlands [member] | Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	15,531	15,642
United Kingdom [member] | United Kingdom government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	946	948
United Kingdom [member] | Belgium government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	23	25
United Kingdom [member] | France government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	34	36
United Kingdom [member] | Germany government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	28	29
United Kingdom [member] | Rest of world government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	29	30
United Kingdom [member] | Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,060	1,068
Central & Eastern Europe [member] | United Kingdom government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1	2
Central & Eastern Europe [member] | Hungary government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	402	360
Central & Eastern Europe [member] | Spain government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	2	2
Central & Eastern Europe [member] | Rest of Europe government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	198	189
Central & Eastern Europe [member] | Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	603	553
Spain & Portugal [member] | Netherlands government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	4	4
Spain & Portugal [member] | Austria government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	4	4
Spain & Portugal [member] | Belgium government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	6	7
Spain & Portugal [member] | France government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	5	5
Spain & Portugal [member] | Luxembourg government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1	4
Spain & Portugal [member] | Spain government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	203	221
Spain & Portugal [member] | Rest of Europe government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	16	18
Spain & Portugal [member] | Rest of world government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	14	20
Spain & Portugal [member] | Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	253	282
Asia [member] | United States government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	372	300
Asia [member] | Rest of Europe government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	17
Asia [member] | Rest of world government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	77	39
Asia [member] | Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	466	€ 339
Asset management [member] | United Kingdom government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	17
Asset management [member] | Government bonds [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	€ 17

Financial Risks - Schedule o148

Financial Risks - Schedule of Credit Risk Concentration - Credit Rating (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
AAA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	€ 32,906	€ 35,704
AA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	10,040	13,161
A [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	22,520	28,599
BBB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	20,646	26,370
BB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,842	2,376
B [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,273	1,260
CCC or lower [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,828	2,326
Assets not rated [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	98	466
A credit rating [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	91,153	110,262
Government bonds [member] | AAA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	21,855	22,620
Government bonds [member] | AA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	5,462	5,682
Government bonds [member] | A [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	311	569
Government bonds [member] | BBB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,198	1,166
Government bonds [member] | BB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	269	158
Government bonds [member] | B [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	152	91
Government bonds [member] | CCC or lower [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	2	4
Government bonds [member] | A credit rating [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	29,249	30,289
Corporate bonds [member] | AAA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	792	912
Corporate bonds [member] | AA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	2,879	4,835
Corporate bonds [member] | A [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	20,765	26,291
Corporate bonds [member] | BBB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	19,045	24,662
Corporate bonds [member] | BB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,395	1,943
Corporate bonds [member] | B [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,011	1,023
Corporate bonds [member] | CCC or lower [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	309	386
Corporate bonds [member] | Assets not rated [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	3	4
Corporate bonds [member] | A credit rating [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	46,199	60,055
RMBs CMBSs ABSs [member] | AAA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	7,102	9,809
RMBs CMBSs ABSs [member] | AA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,700	2,645
RMBs CMBSs ABSs [member] | A [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,443	1,740
RMBs CMBSs ABSs [member] | BBB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	396	540
RMBs CMBSs ABSs [member] | BB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	178	274
RMBs CMBSs ABSs [member] | B [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	111	145
RMBs CMBSs ABSs [member] | CCC or lower [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	1,516	1,937
RMBs CMBSs ABSs [member] | A credit rating [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	12,446	17,090
Other credit grades [member] | AAA [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	3,157	2,362
Other credit grades [member] | BBB [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	6	3
Other credit grades [member] | Assets not rated [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	95	462
Other credit grades [member] | A credit rating [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations credit rating	€ 3,258	€ 2,827

Financial Risks - Schedule o149

Financial Risks - Schedule of Credit Risk Concentration - Mortgage Loans (Detail) - Mortgage loans [member] - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of credit risk exposure [line items]
Credit risk concentrations	€ 33,562	€ 33,696
Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	6,951	8,641
The Netherlands [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	26,434	24,847
Central & Eastern Europe [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	176	207
Spain & Portugal [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1	1
Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	379	464
Agricultural mortgage loans [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	77	101
Agricultural mortgage loans [member] | Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	77	101
Agricultural mortgage loans [member] | Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	8	11
Apartment mortgage loans [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3,371	3,525
Apartment mortgage loans [member] | Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	3,371	3,525
Industrial mortgage loans [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	631	838
Industrial mortgage loans [member] | Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	631	838
Industrial mortgage loans [member] | Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	7
Office mortgage loans [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,226	1,869
Office mortgage loans [member] | Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,226	1,869
Office mortgage loans [member] | The Netherlands [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations		1
Office mortgage loans [member] | Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations		1
Retail mortgage loans [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,385	1,901
Retail mortgage loans [member] | Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1,375	1,889
Retail mortgage loans [member] | The Netherlands [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	11	12
Retail mortgage loans [member] | Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	19	5
Other commercial mortgage loans [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	294	438
Other commercial mortgage loans [member] | Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	256	397
Other commercial mortgage loans [member] | The Netherlands [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	38	41
Other commercial mortgage loans [member] | Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	2
Residential mortgage loans [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	26,578	25,023
Residential mortgage loans [member] | Americas [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	16	23
Residential mortgage loans [member] | The Netherlands [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	26,384	24,793
Residential mortgage loans [member] | Central & Eastern Europe [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	176	207
Residential mortgage loans [member] | Spain & Portugal [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	1	1
Residential mortgage loans [member] | Past due and impaired [member]
Disclosure of credit risk exposure [line items]
Credit risk concentrations	€ 343	€ 448

Financial Risks - Summary of150

Financial Risks - Summary of Income Received From Investments in RMBSs, SMBSs and ABSs (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Gains and losses on total value of investments [line items]
Interest income	€ 476	€ 555
Total gains and losses on sale of assets	245	107
Total	721	662
Investments	12,446	17,090
Residential mortgage- backed securities [member]
Gains and losses on total value of investments [line items]
Interest income	174	215
Total gains and losses on sale of assets	95	61
Total	269	276
Investments	3,655	4,331
Commercial mortgage- backed securities (CMBSs) [member]
Gains and losses on total value of investments [line items]
Interest income	159	191
Total gains and losses on sale of assets	53	28
Total	212	219
Investments	4,086	6,155
Asset backed securities [member]
Gains and losses on total value of investments [line items]
Interest income	56	64
Total gains and losses on sale of assets	26	12
Total	82	75
Investments	2,327	3,532
ABSs - other [member]
Gains and losses on total value of investments [line items]
Interest income	87	85
Total gains and losses on sale of assets	71	7
Total	158	92
Investments	€ 2,378	€ 3,072

Financial Risks - Summary of Am

Financial Risks - Summary of Amortized Cost and Fair Value of Debt Securities (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Unrealized losses	€ 493	€ 1,297
Total fair value	7,119	5,142
Debt securities and money market instruments Americas Netherland and United Kingdom [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	74,672	95,806
Unrealized gains	6,665	7,739
Unrealized losses	(464)	(1,217)
Total fair value	80,873	102,329
Fair value of instruments with unrealized gains	68,385	81,335
Fair value of instruments with unrealized losses	12,488	20,993
Debt securities and money market instruments [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	81,130	102,298
Unrealized gains	7,043	8,035
Unrealized losses	(493)	(1,297)
Total fair value	87,681	109,036
Fair value of instruments with unrealized gains	73,822	85,599
Fair value of instruments with unrealized losses	13,858	23,436
Debt securities and money market instruments [member] | United States government [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	8,011	11,452
Unrealized gains	936	882
Unrealized losses	(101)	(343)
Total fair value	8,846	11,990
Fair value of instruments with unrealized gains	6,805	7,012
Fair value of instruments with unrealized losses	2,041	4,979
Debt securities and money market instruments [member] | Dutch government [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	4,799	4,164
Unrealized gains	992	1,215
Unrealized losses	(11)	(5)
Total fair value	5,781	5,374
Fair value of instruments with unrealized gains	4,885	5,286
Fair value of instruments with unrealized losses	896	87
Debt securities and money market instruments [member] | Other government [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	11,746	11,788
Unrealized gains	838	1,096
Unrealized losses	(17)	(20)
Total fair value	12,568	12,865
Fair value of instruments with unrealized gains	11,501	12,278
Fair value of instruments with unrealized losses	1,067	586
Debt securities and money market instruments [member] | Mortgage backed securities [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	7,326	10,099
Unrealized gains	424	453
Unrealized losses	(56)	(156)
Total fair value	7,694	10,396
Fair value of instruments with unrealized gains	5,569	6,543
Fair value of instruments with unrealized losses	2,126	3,853
Debt securities and money market instruments [member] | Asset backed securities [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	4,624	6,568
Unrealized gains	92	88
Unrealized losses	(17)	(64)
Total fair value	4,698	6,592
Fair value of instruments with unrealized gains	3,878	4,192
Fair value of instruments with unrealized losses	820	2,399
Debt securities and money market instruments [member] | Corporate [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	37,168	50,431
Unrealized gains	3,663	4,073
Unrealized losses	(218)	(668)
Total fair value	40,613	53,837
Fair value of instruments with unrealized gains	34,945	42,361
Fair value of instruments with unrealized losses	5,668	11,476
Debt securities and money market instruments [member] | Money market investments [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	6,690	6,776
Total fair value	6,690	6,776
Fair value of instruments with unrealized gains	5,642	6,758
Fair value of instruments with unrealized losses	1,048	18
Debt securities and money market instruments [member] | Other [member]
Disclosure of additional information on credit risk, unrealized losses and impairments [line items]
Amortized cost	765	1,019
Unrealized gains	98	228
Unrealized losses	(73)	(41)
Total fair value	791	1,206
Fair value of instruments with unrealized gains	597	1,168
Fair value of instruments with unrealized losses	€ 193	€ 38

Financial Risks - Summary of Co

Financial Risks - Summary of Composition by Industry Category of Available-for-sale (AFS) Debt Securities, Money Market Investments and Other in an Unrealized Loss Position (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	€ 13,858	€ 23,436
Unrealized losses	(493)	(1,297)
Residential mortgage- backed securities [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	732	1,588
Unrealized losses	(30)	(83)
Commercial mortgage- backed securities (CMBSs) [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	1,140	2,027
Unrealized losses	(22)	(67)
Asset backed securities [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	87	958
Unrealized losses	(2)	(11)
ABSs - other [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	603	1,130
Unrealized losses	(13)	(43)
Financial Industry - Banking [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	663	1,679
Unrealized losses	(39)	(135)
Financial Industry - Insurance [Member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	231	554
Unrealized losses	(7)	(34)
Financial Industry - Other [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	1,411	618
Unrealized losses	(10)	(28)
Industrial [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	3,330	6,216
Unrealized losses	(132)	(369)
Utility [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	375	836
Unrealized losses	(14)	(45)
Government Securities [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	3,722	5,349
Unrealized losses	(123)	(361)
Other securities [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	193	38
Unrealized losses	(73)	(41)
Held by Aegon Americas, NL and UK [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	12,488	20,993
Unrealized losses	(464)	(1,217)
Held by other segments [member]
Disclosure of unrealized losses - debt securities, money market investments and other [line items]
Carrying value of instruments with unrealized losses	1,371	2,443
Unrealized losses	€ (29)	€ (80)

Financial Risks - Summary of Br

Financial Risks - Summary of Breakdown of RMBS Available-for-sale (AFS) Portfolio (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Total fair value	€ 139,711	€ 159,510
Available for sale - residential mortgage-backed securities by quality [member]
Disclosure of financial assets [line items]
Total fair value	2,985	3,494
Available for sale - residential mortgage-backed securities by quality [member] | GSE guaranteed [member]
Disclosure of financial assets [line items]
Total fair value	1,298	1,271
Available for sale - residential mortgage-backed securities by quality [member] | Prime jumbo [member]
Disclosure of financial assets [line items]
Total fair value	136	194
Available for sale - residential mortgage-backed securities by quality [member] | Alt-A [member]
Disclosure of financial assets [line items]
Total fair value	437	572
Available for sale - residential mortgage-backed securities by quality [member] | Negative amortization floaters [member]
Disclosure of financial assets [line items]
Total fair value	584	712
Available for sale - residential mortgage-backed securities by quality [member] | Other housing [member]
Disclosure of financial assets [line items]
Total fair value	530	745
Available for sale - residential mortgage-backed securities by quality [member] | Insured residential mortgage backed securities [member]
Disclosure of financial assets [line items]
Total fair value	166	237
Available for sale - residential mortgage-backed securities by quality [member] | AAA [member]
Disclosure of financial assets [line items]
Total amortized cost	1,025	771
Available for sale - residential mortgage-backed securities by quality [member] | AAA [member] | GSE guaranteed [member]
Disclosure of financial assets [line items]
Total amortized cost	1,025	771
Available for sale - residential mortgage-backed securities by quality [member] | AA [member]
Disclosure of financial assets [line items]
Total amortized cost	312	589
Available for sale - residential mortgage-backed securities by quality [member] | AA [member] | GSE guaranteed [member]
Disclosure of financial assets [line items]
Total amortized cost	270	500
Available for sale - residential mortgage-backed securities by quality [member] | AA [member] | Prime jumbo [member]
Disclosure of financial assets [line items]
Total amortized cost		1
Available for sale - residential mortgage-backed securities by quality [member] | AA [member] | Alt-A [member]
Disclosure of financial assets [line items]
Total amortized cost	33	39
Available for sale - residential mortgage-backed securities by quality [member] | AA [member] | Other housing [member]
Disclosure of financial assets [line items]
Total amortized cost	9	50
Available for sale - residential mortgage-backed securities by quality [member] | A [member]
Disclosure of financial assets [line items]
Total amortized cost	37	98
Available for sale - residential mortgage-backed securities by quality [member] | A [member] | Prime jumbo [member]
Disclosure of financial assets [line items]
Total amortized cost		1
Available for sale - residential mortgage-backed securities by quality [member] | A [member] | Alt-A [member]
Disclosure of financial assets [line items]
Total amortized cost	20	27
Available for sale - residential mortgage-backed securities by quality [member] | A [member] | Other housing [member]
Disclosure of financial assets [line items]
Total amortized cost	17	71
Available for sale - residential mortgage-backed securities by quality [member] | A [member] | Insured residential mortgage backed securities [member]
Disclosure of financial assets [line items]
Total amortized cost	24	43
Available for sale - residential mortgage-backed securities by quality [member] | BBB [member]
Disclosure of financial assets [line items]
Total amortized cost	43	65
Available for sale - residential mortgage-backed securities by quality [member] | BBB [member] | Prime jumbo [member]
Disclosure of financial assets [line items]
Total amortized cost	5	11
Available for sale - residential mortgage-backed securities by quality [member] | BBB [member] | Alt-A [member]
Disclosure of financial assets [line items]
Total amortized cost	8	11
Available for sale - residential mortgage-backed securities by quality [member] | BBB [member] | Negative amortization floaters [member]
Disclosure of financial assets [line items]
Total amortized cost		1
Available for sale - residential mortgage-backed securities by quality [member] | BBB [member] | Other housing [member]
Disclosure of financial assets [line items]
Total amortized cost	30	43
Available for sale - residential mortgage-backed securities by quality [member] | BBB [member] | Insured residential mortgage backed securities [member]
Disclosure of financial assets [line items]
Total amortized cost	5	8
Available for sale - residential mortgage-backed securities by quality [member] | BB [member]
Disclosure of financial assets [line items]
Total amortized cost	1,300	1,771
Available for sale - residential mortgage-backed securities by quality [member] | BB [member] | Prime jumbo [member]
Disclosure of financial assets [line items]
Total amortized cost	124	170
Available for sale - residential mortgage-backed securities by quality [member] | BB [member] | Alt-A [member]
Disclosure of financial assets [line items]
Total amortized cost	277	403
Available for sale - residential mortgage-backed securities by quality [member] | BB [member] | Negative amortization floaters [member]
Disclosure of financial assets [line items]
Total amortized cost	502	679
Available for sale - residential mortgage-backed securities by quality [member] | BB [member] | Other housing [member]
Disclosure of financial assets [line items]
Total amortized cost	397	519
Available for sale - residential mortgage-backed securities by quality [member] | BB [member] | Insured residential mortgage backed securities [member]
Disclosure of financial assets [line items]
Total amortized cost	146	203
Available for sale - residential mortgage-backed securities by quality [member] | Cost [member]
Disclosure of financial assets [line items]
Total amortized cost	2,717	3,295
Available for sale - residential mortgage-backed securities by quality [member] | Cost [member] | GSE guaranteed [member]
Disclosure of financial assets [line items]
Total amortized cost	1,295	1,272
Available for sale - residential mortgage-backed securities by quality [member] | Cost [member] | Prime jumbo [member]
Disclosure of financial assets [line items]
Total amortized cost	130	182
Available for sale - residential mortgage-backed securities by quality [member] | Cost [member] | Alt-A [member]
Disclosure of financial assets [line items]
Total amortized cost	337	479
Available for sale - residential mortgage-backed securities by quality [member] | Cost [member] | Negative amortization floaters [member]
Disclosure of financial assets [line items]
Total amortized cost	502	679
Available for sale - residential mortgage-backed securities by quality [member] | Cost [member] | Other housing [member]
Disclosure of financial assets [line items]
Total amortized cost	453	683
Available for sale - residential mortgage-backed securities by quality [member] | Cost [member] | Insured residential mortgage backed securities [member]
Disclosure of financial assets [line items]
Total amortized cost	€ 175	€ 254

Financial Risks - Schedule of F

Financial Risks - Schedule of Fair Values of Available-for-sale (AFS) Instruments (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Fair values of available for sale instruments used [line items]
Total fair value	€ 139,711	€ 159,510
Total value of fair value through profit or loss	7,119	5,142
Residential mortgage- backed securities [member] | Americas [member]
Fair values of available for sale instruments used [line items]
Total fair value	2,985	3,494
Residential mortgage- backed securities [member] | Level II [member] | Americas [member]
Fair values of available for sale instruments used [line items]
Total fair value	2,931	3,419
Residential mortgage- backed securities [member] | Level III [member] | Americas [member]
Fair values of available for sale instruments used [line items]
Total fair value	54	75
Asset backed securities [member]
Fair values of available for sale instruments used [line items]
Total fair value	4,314	6,188
Asset backed securities [member] | Level II [member]
Fair values of available for sale instruments used [line items]
Total fair value	3,411	4,880
Asset backed securities [member] | Level III [member]
Fair values of available for sale instruments used [line items]
Total fair value	903	1,309
Commercial mortgage- backed securities (CMBSs) [member] | Americas [member]
Fair values of available for sale instruments used [line items]
Total value of fair value through profit or loss	3,375	5,340
Commercial mortgage- backed securities (CMBSs) [member] | Level II [member] | Americas [member]
Fair values of available for sale instruments used [line items]
Total value of fair value through profit or loss	3,372	5,337
Commercial mortgage- backed securities (CMBSs) [member] | Level III [member] | Americas [member]
Fair values of available for sale instruments used [line items]
Total value of fair value through profit or loss	€ 3	€ 3

Financial Risks - Summary of Cr

Financial Risks - Summary of Credit Quality of USA's Available-For-Sale (AFS) CMBS Portfolio (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Total fair value	€ 7,119	€ 5,142
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member]
Disclosure of financial assets [line items]
Total amortized cost	3,339	5,306
Total fair value	3,375	5,340
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | CMBS [member]
Disclosure of financial assets [line items]
Total amortized cost	3,335	5,301
Total fair value	3,372	5,337
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | CMBS and CRE CDOs [member]
Disclosure of financial assets [line items]
Total amortized cost	4	5
Total fair value	3	3
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | AAA [member]
Disclosure of financial assets [line items]
Total amortized cost	2,626	4,295
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | AAA [member] | CMBS [member]
Disclosure of financial assets [line items]
Total amortized cost	2,626	4,295
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | AA [member]
Disclosure of financial assets [line items]
Total amortized cost	559	688
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | AA [member] | CMBS [member]
Disclosure of financial assets [line items]
Total amortized cost	559	688
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | A [member]
Disclosure of financial assets [line items]
Total amortized cost	63	141
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | A [member] | CMBS [member]
Disclosure of financial assets [line items]
Total amortized cost	63	141
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | BBB [member]
Disclosure of financial assets [line items]
Total amortized cost	3	73
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | BBB [member] | CMBS [member]
Disclosure of financial assets [line items]
Total amortized cost	3	73
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | Less than BBB [member]
Disclosure of financial assets [line items]
Total amortized cost	88	110
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | Less than BBB [member] | CMBS [member]
Disclosure of financial assets [line items]
Total amortized cost	84	105
Aegon Americas [member] | Commercial mortgage- backed securities (CMBSs) [member] | Less than BBB [member] | CMBS and CRE CDOs [member]
Disclosure of financial assets [line items]
Total amortized cost	€ 4	€ 5

Financial Risks - Summary of156

Financial Risks - Summary of Breakdown of Quality of Available-for-sale (AFS) ABS Portfolio (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total fair value	€ 139,711	€ 159,510
Asset backed securities [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total fair value	4,314	6,188
Asset backed securities [member] | Aegon US, NL and UK [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	4,242	6,156
Total fair value	4,314	6,188
Asset backed securities [member] | Aegon US, NL and UK [member] | AAA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	2,357	3,495
Asset backed securities [member] | Aegon US, NL and UK [member] | AA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	503	992
Asset backed securities [member] | Aegon US, NL and UK [member] | A [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	1,029	1,153
Asset backed securities [member] | Aegon US, NL and UK [member] | BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	238	296
Asset backed securities [member] | Aegon US, NL and UK [member] | Less than BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	114	220
Asset backed securities [member] | Aegon US, NL and UK [member] | Credit cards [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	219	575
Total fair value	229	589
Asset backed securities [member] | Aegon US, NL and UK [member] | Credit cards [member] | AAA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	170	482
Asset backed securities [member] | Aegon US, NL and UK [member] | Credit cards [member] | AA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	19	28
Asset backed securities [member] | Aegon US, NL and UK [member] | Credit cards [member] | A [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost		35
Asset backed securities [member] | Aegon US, NL and UK [member] | Credit cards [member] | BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	30	30
Asset backed securities [member] | Aegon US, NL and UK [member] | Autos [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	292	375
Total fair value	292	374
Asset backed securities [member] | Aegon US, NL and UK [member] | Autos [member] | AAA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	226	277
Asset backed securities [member] | Aegon US, NL and UK [member] | Autos [member] | AA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost		9
Asset backed securities [member] | Aegon US, NL and UK [member] | Autos [member] | A [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	64	46
Asset backed securities [member] | Aegon US, NL and UK [member] | Autos [member] | BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	2	42
Asset backed securities [member] | Aegon US, NL and UK [member] | Small business loans [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	70	118
Total fair value	74	116
Asset backed securities [member] | Aegon US, NL and UK [member] | Small business loans [member] | AA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost		1
Asset backed securities [member] | Aegon US, NL and UK [member] | Small business loans [member] | A [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	3	7
Asset backed securities [member] | Aegon US, NL and UK [member] | Small business loans [member] | BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	6	6
Asset backed securities [member] | Aegon US, NL and UK [member] | Small business loans [member] | Less than BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	62	104
Asset backed securities [member] | Aegon US, NL and UK [member] | CDOs backed by ABS, Corp. bonds, Bank loans [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	2,265	3,493
Total fair value	2,281	3,504
Asset backed securities [member] | Aegon US, NL and UK [member] | CDOs backed by ABS, Corp. bonds, Bank loans [member] | AAA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	1,467	2,108
Asset backed securities [member] | Aegon US, NL and UK [member] | CDOs backed by ABS, Corp. bonds, Bank loans [member] | AA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	407	790
Asset backed securities [member] | Aegon US, NL and UK [member] | CDOs backed by ABS, Corp. bonds, Bank loans [member] | A [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	224	368
Asset backed securities [member] | Aegon US, NL and UK [member] | CDOs backed by ABS, Corp. bonds, Bank loans [member] | BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	120	134
Asset backed securities [member] | Aegon US, NL and UK [member] | CDOs backed by ABS, Corp. bonds, Bank loans [member] | Less than BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	46	94
Asset backed securities [member] | Aegon US, NL and UK [member] | ABSs - other [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	1,395	1,596
Total fair value	1,438	1,606
Asset backed securities [member] | Aegon US, NL and UK [member] | ABSs - other [member] | AAA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	494	627
Asset backed securities [member] | Aegon US, NL and UK [member] | ABSs - other [member] | AA [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	76	165
Asset backed securities [member] | Aegon US, NL and UK [member] | ABSs - other [member] | A [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	738	697
Asset backed securities [member] | Aegon US, NL and UK [member] | ABSs - other [member] | BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	81	85
Asset backed securities [member] | Aegon US, NL and UK [member] | ABSs - other [member] | Less than BBB [member]
Breakdown by quality of the available-for-sale (AFS) ABS portfolio [line items]
Total amortized cost	€ 6	€ 22

Financial Risks - Summary of157

Financial Risks - Summary of Composition by Maturity of all Available-for-sale Debt Securities in an Unrealized Loss Position (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of available for sale debt securities [line items]
Carrying value of securities with gross unrealized losses	€ 11,246	€ 20,938
Gross unrealized losses	(391)	(1,176)
Not later than 1 year [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with gross unrealized losses	466	742
Gross unrealized losses	(6)	(13)
1-5 years [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with gross unrealized losses	1,937	2,444
Gross unrealized losses	(31)	(73)
Over 5 through 10 years [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with gross unrealized losses	4,580	6,097
Gross unrealized losses	(95)	(197)
Over 10 years [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with gross unrealized losses	4,263	11,656
Gross unrealized losses	€ (258)	€ (892)

Financial Risks - Summary of158

Financial Risks - Summary of Composition by Credit Quality of Debt Securities, Available-for-sale, in an Unrealized Loss Position (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	€ 11,246	€ 20,938
Unrealized losses	(391)	(1,176)
AAA [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	4,924	8,536
Unrealized losses	(135)	(422)
AA [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	1,037	1,581
Unrealized losses	(17)	(48)
A [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	1,775	3,599
Unrealized losses	(45)	(154)
BBB [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	2,339	5,249
Unrealized losses	(70)	(288)
BB [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	507	920
Unrealized losses	(39)	(128)
B [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	323	345
Unrealized losses	(32)	(40)
Below B [member]
Disclosure of available for sale debt securities [line items]
Carrying value of securities with unrealized losses	341	706
Unrealized losses	€ (54)	€ (96)

Financial Risks - Summary of Le

Financial Risks - Summary of Length of Time an Available-for-sale Security (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	€ (125)	€ (263)
Investment grade [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(266)	(912)
Investment grade [member] | 0 - 6 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(46)	(635)
Investment grade [member] | 6 - 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(9)	(6)
Investment grade [member] | > 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(211)	(270)
Below investment grade [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(125)	(263)
Below investment grade [member] | 0 - 6 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(15)	(30)
Below investment grade [member] | 6 - 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(5)	(20)
Below investment grade [member] | > 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	(105)	(213)
Carrying value [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	1,171	1,971
Carrying value [member] | Investment grade [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	10,076	18,966
Carrying value [member] | Investment grade [member] | 0 - 6 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	4,106	14,848
Carrying value [member] | Investment grade [member] | 6 - 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	1,479	190
Carrying value [member] | Investment grade [member] | > 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	4,490	3,929
Carrying value [member] | Below investment grade [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	1,171	1,971
Carrying value [member] | Below investment grade [member] | 0 - 6 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	485	587
Carrying value [member] | Below investment grade [member] | 6 - 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	62	198
Carrying value [member] | Below investment grade [member] | > 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities investment grade unrealized loss	€ 624	€ 1,186

Financial Risks - Aging and Sev

Financial Risks - Aging and Severity Unrealised Losses Debt Securities (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of available for sale securities [line items]
Carrying value	€ (125)	€ (263)
0 - 6 months [member]
Disclosure of available for sale securities [line items]
Carrying value	(15)	(30)
0 - 6 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(13)	(27)
0 - 6 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(2)	(2)
0 - 6 months [member] | CV below 40% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value		(2)
6 - 12 months [member]
Disclosure of available for sale securities [line items]
Carrying value	(5)	(20)
6 - 12 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(5)	(18)
6 - 12 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value		(2)
12-24 months [member]
Disclosure of available for sale securities [line items]
Carrying value	(13)	(60)
12-24 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(10)	(55)
12-24 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(4)	(2)
12-24 months [member] | CV below 40% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value		(3)
> 24 months [member]
Disclosure of available for sale securities [line items]
Carrying value	(92)	(153)
> 24 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(63)	(71)
> 24 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(16)	(67)
> 24 months [member] | CV below 40% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	(12)	(15)
Carrying value [member]
Disclosure of available for sale securities [line items]
Carrying value	1,171	1,971
Carrying value [member] | 0 - 6 months [member]
Disclosure of available for sale securities [line items]
Carrying value	485	587
Carrying value [member] | 0 - 6 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	482	585
Carrying value [member] | 0 - 6 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	3	2
Carrying value [member] | 0 - 6 months [member] | CV below 40% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value		1
Carrying value [member] | 6 - 12 months [member]
Disclosure of available for sale securities [line items]
Carrying value	62	198
Carrying value [member] | 6 - 12 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	62	196
Carrying value [member] | 6 - 12 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value		3
Carrying value [member] | 12-24 months [member]
Disclosure of available for sale securities [line items]
Carrying value	75	478
Carrying value [member] | 12-24 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	67	475
Carrying value [member] | 12-24 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	8	3
Carrying value [member] | > 24 months [member]
Disclosure of available for sale securities [line items]
Carrying value	549	708
Carrying value [member] | > 24 months [member] | CV 70-100% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	511	582
Carrying value [member] | > 24 months [member] | CV 40-70% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	30	119
Carrying value [member] | > 24 months [member] | CV below 40% of amortized cost [member]
Disclosure of available for sale securities [line items]
Carrying value	€ 8	€ 7

Financial Risks - Summary of Re

Financial Risks - Summary of Realized Gains and Losses on Debt Securities (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Credit Quality Of Debt Securities [Abstract]
Gross realized gains	€ 1,876	€ 2,257
Gross realized losses	€ (173)	€ (323)

Financial Risks - Summary of162

Financial Risks - Summary of Length of Time Security and Respective Realized Loss (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of available for sale securities [line items]
Debt securities	€ (173)	€ (323)
Not later than 1 year [member]
Disclosure of available for sale securities [line items]
Debt securities	(137)	(221)
> 12 months [member]
Disclosure of available for sale securities [line items]
Debt securities	€ (36)	€ (103)

Financial Risks - Summary of163

Financial Risks - Summary of Composition of Impairment Losses and Recoveries (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of impairment loss recognised or reversed [abstract]
Other (none individually greater than EUR 25 million)	€ (16)	€ (52)
Subtotal	(16)	(52)
Total recoveries	16	42
Sub-total	16	42
Net (impairments) and recoveries	€ 0	€ (11)

Financial Risks - Summary of164

Financial Risks - Summary of Composition of Impairment Losses and Recoveries (Parenthetical) (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of impairment loss recognised or reversed [line items]
Net impairments and (recoveries)	€ 0	€ 11,000,000
Bottom of range [member]
Disclosure of impairment loss recognised or reversed [line items]
Net impairments and (recoveries)	€ 25,000,000

Financial Risks - Summary of Fi

Financial Risks - Summary of Financial Assets that are Either Past Due or Impaired (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial assets impaired [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	€ 1,381	€ 1,803
Financial assets impaired [member] | Share [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	48	81
Financial assets impaired [member] | Debt securities [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	1,063	1,326
Financial assets impaired [member] | Mortgage loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	262	377
Financial assets impaired [member] | Private loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets		6
Financial assets impaired [member] | Other loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	3	3
Financial assets impaired [member] | Other financial asset [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	6	9
Past due but not impaired assets [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	244	197
Past due but not impaired assets [member] | Debt securities [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	91	73
Past due but not impaired assets [member] | Mortgage loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	117	87
Past due but not impaired assets [member] | Other loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	35	36
Past due but not impaired assets [member] | Accrued interest [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	1	1
Past due but not impaired assets [member] | 0 - 6 months [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	191	167
Past due but not impaired assets [member] | 0 - 6 months [member] | Debt securities [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	49	58
Past due but not impaired assets [member] | 0 - 6 months [member] | Mortgage loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	111	80
Past due but not impaired assets [member] | 0 - 6 months [member] | Other loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	31	29
Past due but not impaired assets [member] | 6 - 12 months [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	18	17
Past due but not impaired assets [member] | 6 - 12 months [member] | Debt securities [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	14	9
Past due but not impaired assets [member] | 6 - 12 months [member] | Mortgage loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	2	4
Past due but not impaired assets [member] | 6 - 12 months [member] | Other loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	1	4
Past due but not impaired assets [member] | 6 - 12 months [member] | Accrued interest [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	1
Past due but not impaired assets [member] | Not later than 1 year [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	35	13
Past due but not impaired assets [member] | Not later than 1 year [member] | Debt securities [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	28	7
Past due but not impaired assets [member] | Not later than 1 year [member] | Mortgage loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	4	3
Past due but not impaired assets [member] | Not later than 1 year [member] | Other loans - held at amortized cost [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	3	2
Past due but not impaired assets [member] | Not later than 1 year [member] | Accrued interest [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impaired financial assets	€ 1	€ 1

Financial Risks - Summary of Un

Financial Risks - Summary of Unrealized Gains and Losses on Share Positions (Detail) - Share [member] - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of unrealized gains and losses on share positions [line items]
Cost basis	€ 386	€ 596
Carrying value	434	786
Net unrealized gains / (losses)	49	190
Carrying value of securities with gross unrealized gains	401	722
Gross unrealized gains	62	202
Carrying value of securities with gross unrealized losses	34	64
Gross unrealized losses	€ (13)	€ (13)

Financial Risks - Summary of167

Financial Risks - Summary of Composition of Shares by Industry Sector in Unrealized Loss Position (Detail) - Aegon US, NL and UK [member] - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of impairment losses on shares [line items]
Carrying value of instruments with unrealized losses	€ 34	€ 64
Unrealized losses	(13)	(13)
Financial Industry [member]
Disclosure of impairment losses on shares [line items]
Carrying value of instruments with unrealized losses	19	54
Unrealized losses	(12)	(12)
Other industry [member]
Disclosure of impairment losses on shares [line items]
Carrying value of instruments with unrealized losses	14	€ 10
Unrealized losses	€ (2)

Financial Risks - Summary of Sh

Financial Risks - Summary of Shares Cost Prior to Impairment (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)
Disclosure Of Impairment Losses On Shares [Abstract]
Shares	$ (1)

Financial Risks - Summary of Ge

Financial Risks - Summary of General Account Equity Real Estate and Other Non-fixed-income Portfolio (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	€ 6,284	€ 6,739
Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	3,566	4,496
The Netherlands [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	2,375	1,930
United Kingdom [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	199	182
Central & Eastern Europe [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	62	45
Spain & Portugal [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	20	19
Asia [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1
Equity Funds 1 [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	351	711
Equity Funds 1 [member] | Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	142	154
Equity Funds 1 [member] | The Netherlands [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	161	494
Equity Funds 1 [member] | United Kingdom [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets		27
Equity Funds 1 [member] | Central & Eastern Europe [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	47	37
Common shares [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	290	518
Common shares [member] | Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	232	410
Common shares [member] | United Kingdom [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	5	58
Common shares [member] | Central & Eastern Europe [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	8	5
Common shares [member] | Spain & Portugal [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	4	4
Common shares [member] | Asia [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1
Preferred Shares [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	192	229
Preferred Shares [member] | Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	192	229
Investments in real estate [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	2,147	1,999
Investments in real estate [member] | Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	633	743
Investments in real estate [member] | The Netherlands [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1,495	1,238
Investments in real estate [member] | Central & Eastern Europe [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	4	3
Investments in real estate [member] | Spain & Portugal [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	15	15
Hedge funds [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	691	1,168
Hedge funds [member] | Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	688	1,165
Hedge funds [member] | The Netherlands [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1	1
Other Alternative Investments [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1,448	1,385
Other Alternative Investments [member] | Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1,122	1,207
Other Alternative Investments [member] | The Netherlands [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	309	156
Other financial asset [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1,165	729
Other financial asset [member] | Americas [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	556	588
Other financial asset [member] | The Netherlands [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	410	41
Other financial asset [member] | United Kingdom [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	194	98
Other financial asset [member] | Central & Eastern Europe [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	2	1
Other financial asset [member] | Spain & Portugal [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	2
Asset management [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	4	4
Asset management [member] | Hedge funds [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	2	2
Asset management [member] | Other financial asset [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	1	1
Holding and other activities [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	57	62
Holding and other activities [member] | Common shares [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	40	41
Holding and other activities [member] | Other Alternative Investments [member]
General account equity, real estate and other non-fixed-income portfolio [line items]
Maximum exposure to credit risk of financial assets	€ 18	€ 21

Financial Risks - Summary of Ma

Financial Risks - Summary of Market Risk Concentrations in Shares (Detail) - shares	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	80,996,000	66,105,000	44,532,000
Concentration Risk By Type [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	1,551	1,315
Concentration Risk By Type [member] | Financial assets impaired [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	48	81
Concentration Risk By Type [member] | Communication [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	28	43
Concentration Risk By Type [member] | Consumer [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	8	41
Concentration Risk By Type [member] | Financials [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	499	682
Concentration Risk By Type [member] | Financials [member] | Financial assets impaired [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	1	2
Concentration Risk By Type [member] | Funds [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	968	506
Concentration Risk By Type [member] | Funds [member] | Financial assets impaired [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	43	79
Concentration Risk By Type [member] | Industries [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	19	22
Concentration Risk By Type [member] | Other [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	30	20
Concentration Risk By Type [member] | Other [member] | Financial assets impaired [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	4
Concentration Risk By Type [member] | Americas [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	567	793
Concentration Risk By Type [member] | Americas [member] | Communication [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	28	43
Concentration Risk By Type [member] | Americas [member] | Consumer [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	8	41
Concentration Risk By Type [member] | Americas [member] | Financials [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	491	675
Concentration Risk By Type [member] | Americas [member] | Industries [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	19	21
Concentration Risk By Type [member] | Americas [member] | Other [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	22	12
Concentration Risk By Type [member] | The Netherlands [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	859	334
Concentration Risk By Type [member] | The Netherlands [member] | Financials [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	3	4
Concentration Risk By Type [member] | The Netherlands [member] | Funds [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	852	326
Concentration Risk By Type [member] | The Netherlands [member] | Other [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	4	4
Concentration Risk By Type [member] | United Kingdom [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	5	84
Concentration Risk By Type [member] | United Kingdom [member] | Financials [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	1	1
Concentration Risk By Type [member] | United Kingdom [member] | Funds [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	4	84
Concentration Risk By Type [member] | Central & Eastern Europe [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	54	35
Concentration Risk By Type [member] | Central & Eastern Europe [member] | Funds [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	53	33
Concentration Risk By Type [member] | Central & Eastern Europe [member] | Other [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	2	2
Concentration Risk By Type [member] | Spain & Portugal [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	5	4
Concentration Risk By Type [member] | Spain & Portugal [member] | Financials [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	3	2
Concentration Risk By Type [member] | Spain & Portugal [member] | Funds [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	2	2
Concentration Risk By Type [member] | Asia [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	1
Concentration Risk By Type [member] | Asia [member] | Financials [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	1
Concentration Risk By Type [member] | Asset management [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	2	2
Concentration Risk By Type [member] | Asset management [member] | Other [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Shares Outstanding	2	2

Financial Risks - Summary of Cl

Financial Risks - Summary of Closing Levels of Certain Major Indices (Detail) pure in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
S & P 500 [member]
Disclosure of equities prices [line items]
Closing levels of major indices	2,674	2,239	2,044	2,059	1,848
Nasdaq [member]
Disclosure of equities prices [line items]
Closing levels of major indices	6,903	5,383	5,007	4,736	4,177
FTSE 100 [member]
Disclosure of equities prices [line items]
Closing levels of major indices	7,688	7,143	6,242	6,566	6,749
AEX [member]
Disclosure of equities prices [line items]
Closing levels of major indices	545	483	442	424	402

Financial Risks - Disclosure172

Financial Risks - Disclosure of Sensitivity Analysis of Shareholders' Equity to Equity Markets (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Equity prices, ten percentage higher [member]
Disclosure of sensitivity analysis of shareholders' equity to equity markets [line items]
Estimated approximate effects on net income	€ 317	€ 158
Estimated approximate effects on shareholders' equity	405	291
Equity prices, ten percentage lower [member]
Disclosure of sensitivity analysis of shareholders' equity to equity markets [line items]
Estimated approximate effects on net income	(316)	(227)
Estimated approximate effects on shareholders' equity	(405)	(360)
Equity Prices, Twenty Percentage Higher [member]
Disclosure of sensitivity analysis of shareholders' equity to equity markets [line items]
Estimated approximate effects on net income	647	324
Estimated approximate effects on shareholders' equity	820	587
Equity Prices, Twenty Percentage Lower [member]
Disclosure of sensitivity analysis of shareholders' equity to equity markets [line items]
Estimated approximate effects on net income	(660)	(338)
Estimated approximate effects on shareholders' equity	€ (839)	€ (604)

Financial Risks - Summary of173

Financial Risks - Summary of Maturity Analysis Gross Undiscounted Contractual Cash Flows (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Trust pass - through securities	€ 133	€ 156
Subordinated loans	764	767
Borrowings	13,635	13,153
Investment contracts for account of policyholders	16,943	19,572
Contractual maturities of each category of financial liabilities [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Trust pass - through securities	221	261
Subordinated loans	1,333	1,422
Borrowings	15,362	15,446
Investment contracts	17,448	18,923
Investment contracts for account of policyholders	36,478	38,591
Other financial liabilities	9,125	9,844
On demand [member] | Contractual maturities of each category of financial liabilities [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Investment contracts	12,189	12,695
Investment contracts for account of policyholders	33,738	35,239
Other financial liabilities	6,277	6,743
Not later than 1 year [member] | Contractual maturities of each category of financial liabilities [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Trust pass - through securities	9	10
Subordinated loans	28	28
Borrowings	1,888	2,072
Investment contracts	1,381	1,110
Investment contracts for account of policyholders	2,605	2,885
Other financial liabilities	2,002	2,224
1-5 years [member] | Contractual maturities of each category of financial liabilities [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Trust pass - through securities	34	39
Subordinated loans	112	112
Borrowings	8,396	5,146
Investment contracts	1,591	2,040
Investment contracts for account of policyholders	1
Other financial liabilities	791	839
Over 5 through 10 years [member] | Contractual maturities of each category of financial liabilities [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Trust pass - through securities	110	131
Subordinated loans	56	84
Borrowings	2,411	1,535
Investment contracts	577	1,093
Investment contracts for account of policyholders	1
Other financial liabilities	23	12
Over 10 years [member] | Contractual maturities of each category of financial liabilities [member]
Disclosure of maturity analysis for financial assets held for managing liquidity risk [line items]
Trust pass - through securities	68	81
Subordinated loans	1,137	1,198
Borrowings	2,668	6,693
Investment contracts	1,709	1,985
Investment contracts for account of policyholders	133	466
Other financial liabilities	€ 32	€ 26

Financial Risks - Summary of174

Financial Risks - Summary of Financial Liabilities Relating to Insurance and Investment Contracts (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial liabilities relating to insurance and investment contracts [line items]
Insurance contracts	€ 110,818	€ 119,569
Liquidity risk [member]
Financial liabilities relating to insurance and investment contracts [line items]
Insurance contracts	160,070	177,275
Insurance contracts for account of policyholders	201,339	188,331
Investment contracts	19,960	25,303
Investment contracts for account of policyholders	110,353	123,136
Liquidity risk [member] | On demand [member]
Financial liabilities relating to insurance and investment contracts [line items]
Investment contracts for account of policyholders	234	292
Liquidity risk [member] | Not later than 1 year [member]
Financial liabilities relating to insurance and investment contracts [line items]
Insurance contracts	3,865	4,522
Insurance contracts for account of policyholders	8,122	7,719
Investment contracts	5,961	5,278
Investment contracts for account of policyholders	10,117	10,328
Liquidity risk [member] | 1-5 years [member]
Financial liabilities relating to insurance and investment contracts [line items]
Insurance contracts	16,348	18,361
Insurance contracts for account of policyholders	33,916	32,577
Investment contracts	6,870	7,574
Investment contracts for account of policyholders	23,871	25,850
Liquidity risk [member] | Over 5 through 10 years [member]
Financial liabilities relating to insurance and investment contracts [line items]
Insurance contracts	17,155	18,712
Insurance contracts for account of policyholders	35,391	33,490
Investment contracts	2,510	2,814
Investment contracts for account of policyholders	21,202	22,867
Liquidity risk [member] | Over 10 years [member]
Financial liabilities relating to insurance and investment contracts [line items]
Insurance contracts	122,702	135,679
Insurance contracts for account of policyholders	123,911	114,545
Investment contracts	4,620	9,635
Investment contracts for account of policyholders	€ 54,930	€ 63,798

Financial Risks - Summary Of175

Financial Risks - Summary Of Maturity Analysis For Derivative Financial Instruments (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	€ 4,374	€ 6,855
Cash outflows	(6,812)	(8,607)
Carrying value [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	51,245	55,034
Cash outflows	(49,471)	(54,263)
Not later than 1 year [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	129	222
Cash outflows	(67)	(123)
Not later than 1 year [member] | Carrying value [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	14,646	18,933
Cash outflows	(14,766)	(19,794)
1-5 years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	783	1,014
Cash outflows	(332)	(417)
1-5 years [member] | Carrying value [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	7,024	6,154
Cash outflows	(6,367)	(6,435)
Over 5 through 10 years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	1,033	1,635
Cash outflows	(543)	(789)
Over 5 through 10 years [member] | Carrying value [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	10,658	10,862
Cash outflows	(9,890)	(9,807)
Over 10 years [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	2,428	3,984
Cash outflows	(5,870)	(7,278)
Over 10 years [member] | Carrying value [member]
Disclosure of maturity analysis for derivative financial liabilities [line items]
Cash inflows	18,916	19,084
Cash outflows	€ (18,447)	€ (18,227)

Segment Information - Additiona

Segment Information - Additional Information (Detail) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)Segment	Dec. 31, 2017EUR (€)Segment	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of operating segments [line items]
Other income /(charges) expense due to model and assumption updates		€ (276)	€ (118)
Gain (charge) before tax due to actuarial assumption and model updates			118	€ 131
Losses on change in fair value on economic hedges		(1,159)	239	123
Ineffectiveness fair value hedge		2	12	8
Impairment charges and reversals on financial assets, excluding receivables		42	59	(24)
Impairment charges and reversals on non-financial assets and receivables			36	1,275
Commissions and expenses [member]
Disclosure of operating segments [line items]
Restructuring charges		116	54	59
Amortization of deferred expenses		285	137	126
Amortization of VOBA and future servicing rights		(94)	8	(63)
Commissions and expense include a DPAC/VOBA fair value adjustment		135	105	41
Impairment (charges) reversals [member]
Disclosure of operating segments [line items]
Impairment charges and reversals on financial assets, excluding receivables		42	59	24
Impairment charges and reversals on non-financial assets and receivables		€ (1)	38	1,274
Bottom of range [member]
Disclosure of operating segments [line items]
Long-term expected return on assets rate	8.00%	8.00%
Top of range [member]
Disclosure of operating segments [line items]
Long-term expected return on assets rate	10.00%	10.00%
Non-cash changes [member]
Disclosure of operating segments [line items]
Gain (losses) on over- or underperformance of derivatives		€ 9	8	4
Losses on change in fair value on economic hedges		(145)	(297)	(41)
Ineffectiveness fair value hedge		€ (6)	€ 26	€ (17)
Asset management [member]
Disclosure of operating segments [line items]
Number of operating segments | Segment	1	1
Holding and other activities [member]
Disclosure of operating segments [line items]
Number of operating segments | Segment	1	1
Americas [member]
Disclosure of operating segments [line items]
Number of operating segments | Segment	1	1
Other income /(charges) expense due to model and assumption updates		€ (402)
Other income /(charges) expense due to model change in fixed annuities discount rate	$ 50	44
Other income /(charges) expense due to other assumption changes and model updates	61	54
Americas [member] | Universal life business [member]
Disclosure of operating segments [line items]
Other income /(charges) expense due to model and assumption updates	$ (343)	€ (303)
Asia [member]
Disclosure of operating segments [line items]
Number of operating segments | Segment	1	1
The Netherlands [member]
Disclosure of operating segments [line items]
Other income /(charges) expense due to model and assumption updates		€ 101

Segment Information - Summary o

Segment Information - Summary of Segment Results (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	€ 2,163	€ 1,960	€ 1,901
Fair value items	45	(912)	(710)
Realized gains / (losses) on investments	408	334	338
Impairment charges	(71)	(112)	(91)
Impairment reversals	32	58	119
Other income / (charges)	(72)	(771)	(2,159)
Run-off businesses	30	54	88
Income / (loss) before tax	2,534	610	(514)
Income tax (expense) / benefit	(65)	(172)	83
Net income / (loss)	2,469	438	(431)
Revenues
Life insurance gross premiums	19,952	20,400	19,583
Accident and health insurance	2,511	2,609	2,703
General insurance	363	444	640
Total gross premiums	22,826	23,453	22,925
Investment income	7,338	7,788	8,525
Fee and commission income	2,802	2,408	2,438
Other revenues	7	7	14
Total revenues	32,973	33,655	33,902
Asset management [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax		149	170
Realized gains / (losses) on investments		3	3
Impairment charges		(5)
Other income / (charges)		(2)	(1)
Income / (loss) before tax		145	172
Income tax (expense) / benefit		(48)	(50)
Net income / (loss)		97	121
Inter-segment underlying earnings		234	264
Revenues
Investment income		3	7
Fee and commission income		632	650
Other revenues		1
Total revenues		636	657
Inter-segment revenues		243	261
Holding and other activities [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax		(162)	(163)
Fair value items		(74)	(68)
Impairment charges		(7)
Other income / (charges)		(6)
Income / (loss) before tax		(249)	(230)
Income tax (expense) / benefit		65	71
Net income / (loss)		(183)	(159)
Inter-segment underlying earnings		84	10
Revenues
Life insurance gross premiums		6	4
Accident and health insurance		(4)	6
General insurance		5	2
Total gross premiums		7	13
Investment income		406	392
Other revenues		3	7
Total revenues		416	412
Inter-segment revenues		409	399
Segment total [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	2,103	1,913	1,867
Fair value items	142	(840)	(651)
Realized gains / (losses) on investments	413	340	346
Impairment charges	(71)	(113)	(70)
Impairment reversals	32	58	119
Other income / (charges)	(68)	(771)	(2,180)
Run-off businesses	30	54	88
Income / (loss) before tax	2,579	641	(482)
Income tax (expense) / benefit	(110)	(203)	51
Net income / (loss)	2,469	438	(431)
Revenues
Life insurance gross premiums	20,498	20,898	20,013
Accident and health insurance	2,531	2,624	2,717
General insurance	466	536	720
Total gross premiums	23,496	24,058	23,450
Investment income	7,396	7,841	8,576
Fee and commission income	2,991	2,596	2,633
Other revenues	13	11	19
Total revenues	33,895	34,507	34,677
Geographical Consolidation [member] | Americas [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	1,381	1,249	1,278
Fair value items	170	(521)	(691)
Realized gains / (losses) on investments	157	(13)	(74)
Impairment charges	(38)	(72)	(43)
Impairment reversals	22	42	114
Other income / (charges)	(353)	(100)	(913)
Run-off businesses	30	54	88
Income / (loss) before tax	1,369	638	(241)
Income tax (expense) / benefit	198	(80)	6
Net income / (loss)	1,567	559	(235)
Inter-segment underlying earnings	(78)	(194)	(220)
Revenues
Life insurance gross premiums	7,437	7,363	7,046
Accident and health insurance	2,115	2,204	2,266
Total gross premiums	9,553	9,567	9,312
Investment income	3,368	3,717	3,680
Fee and commission income	1,919	1,651	1,704
Other revenues	5	4	9
Total revenues	14,844	14,940	14,705
Inter-segment revenues			24
Geographical Consolidation [member] | The Netherlands [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	520	534	537
Fair value items	30	(228)	126
Realized gains / (losses) on investments	184	189	306
Impairment charges	(27)	(29)	(25)
Impairment reversals	10	17	5
Other income / (charges)	296	44	27
Income / (loss) before tax	1,013	526	977
Income tax (expense) / benefit	(196)	(109)	(223)
Net income / (loss)	818	418	753
Inter-segment underlying earnings	(111)	(95)	(55)
Revenues
Life insurance gross premiums	1,857	2,015	2,240
Accident and health insurance	203	210	234
General insurance	148	266	473
Total gross premiums	2,208	2,491	2,947
Investment income	2,172	2,135	2,277
Fee and commission income	326	350	351
Total revenues	4,706	4,976	5,575
Inter-segment revenues	(1)	3	2
Geographical Consolidation [member] | United Kingdom [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	116	59	(27)
Fair value items	(82)	(7)	(25)
Realized gains / (losses) on investments	62	153	103
Other income / (charges)	40	(678)	(1,247)
Income / (loss) before tax	137	(474)	(1,196)
Income tax (expense) / benefit	(56)	18	268
Net income / (loss)	81	(456)	(928)
Inter-segment underlying earnings	(87)	(87)	(63)
Revenues
Life insurance gross premiums	9,603	9,888	8,465
Accident and health insurance	32	36	47
Total gross premiums	9,635	9,924	8,512
Investment income	1,517	1,661	2,331
Fee and commission income	235	95	98
Total revenues	11,387	11,680	10,941
Geographical Consolidation [member] | Central & Eastern Europe [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	67	55	37
Realized gains / (losses) on investments	1		2
Impairment charges	(2)	1	(2)
Other income / (charges)		(23)	(2)
Income / (loss) before tax	66	34	35
Income tax (expense) / benefit	(9)	(15)	(11)
Net income / (loss)	57	19	24
Inter-segment underlying earnings	(11)	(14)	(14)
Revenues
Life insurance gross premiums	411	399	477
Accident and health insurance	1	1	1
General insurance	216	179	164
Total gross premiums	628	578	642
Investment income	49	45	45
Fee and commission income	43	36	39
Total revenues	720	659	726
Geographical Consolidation [member] | Spain & Portugal [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	4	8	12
Fair value items		(1)
Realized gains / (losses) on investments		(1)
Other income / (charges)			17
Income / (loss) before tax	4	6	29
Income tax (expense) / benefit	(6)	(8)	(7)
Net income / (loss)	(2)	(2)	22
Inter-segment underlying earnings	(1)	(1)
Revenues
Life insurance gross premiums	208	191	174
Accident and health insurance	83	73	64
General insurance	103	92	80
Total gross premiums	394	355	317
Investment income	37	45	41
Fee and commission income	17	14	13
Other revenues	3	2	2
Total revenues	450	416	373
Geographical Consolidation [member] | Asia [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	49	21	20
Fair value items		(9)	7
Realized gains / (losses) on investments	4	8	7
Impairment charges	(1)	(1)
Other income / (charges)	(19)	(5)	(61)
Income / (loss) before tax	33	14	(27)
Income tax (expense) / benefit	(28)	(27)	(3)
Net income / (loss)	5	(13)	(30)
Inter-segment underlying earnings	(1)	74	77
Revenues
Life insurance gross premiums	983	1,121	1,713
Accident and health insurance	97	104	105
Total gross premiums	1,080	1,225	1,819
Investment income	246	232	194
Fee and commission income	63	61	62
Other revenues	1
Total revenues	1,390	1,517	2,076
Inter-segment revenues	3	79	101
Geographical Consolidation [member] | Asset management [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	136
Realized gains / (losses) on investments	3
Other income / (charges)	(49)
Income / (loss) before tax	90
Income tax (expense) / benefit	(42)
Net income / (loss)	48
Inter-segment underlying earnings	214
Revenues
Investment income	4
Fee and commission income	609
Total revenues	613
Inter-segment revenues	222
Eliminations [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax			2
Impairment charges		1
Impairment reversals		(1)
Income / (loss) before tax			2
Net income / (loss)			2
Revenues
Life insurance gross premiums	(9)	(84)	(106)
Accident and health insurance			(6)
General insurance	(1)	(5)
Total gross premiums	(10)	(89)	(112)
Investment income	(291)	(403)	(391)
Fee and commission income	(221)	(242)	(284)
Total revenues	(522)	(734)	(787)
Eliminations [member] | Holding and other activities [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	(170)
Fair value items	24
Impairment charges	(3)
Other income / (charges)	16
Income / (loss) before tax	(134)
Income tax (expense) / benefit	29
Net income / (loss)	(105)
Inter-segment underlying earnings	73
Revenues
Life insurance gross premiums	7
General insurance	1
Total gross premiums	8
Investment income	295
Other revenues	4
Total revenues	308
Inter-segment revenues	298
Joint ventures and associates eliminations [member]
Summary of underlying earnings per segment [line items]
Underlying earnings before tax	61	48	34
Fair value items	(97)	(72)	(59)
Realized gains / (losses) on investments	(5)	(6)	(8)
Impairment charges			(21)
Other income / (charges)	(4)		21
Income / (loss) before tax	(44)	(31)	(33)
Income tax (expense) / benefit	44	31	33
Revenues
Life insurance gross premiums	(546)	(498)	(431)
Accident and health insurance	(20)	(15)	(14)
General insurance	(103)	(92)	(80)
Total gross premiums	(670)	(606)	(524)
Investment income	(58)	(54)	(51)
Fee and commission income	(189)	(188)	(195)
Other revenues	(5)	(4)	(5)
Total revenues	€ (922)	€ (852)	€ (775)

Segment Information - Summar178

Segment Information - Summary of Reconciliation from Underlying Earnings Before Tax to Income Before Tax (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of reconciliation from underlying earnings before tax to income before tax [Line Items]
Underlying earnings before tax	€ 2,163	€ 1,960	€ 1,901
Elimination of share in earnings of joint ventures and associates	61	48	34
Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives	(437)	(783)	(571)
Realized gains and losses on financial investments	431	327	349
Gains and (losses) on investments in real estate	193	70	145
Net fair value change of derivatives	(134)	(277)	(29)
Net foreign currency gains and (losses)	5	30	(5)
Realized gains and (losses) on repurchased debt	1	1	2
Other income	540	66	83
Change in valuation of liabilities for insurance contracts	(254)	(144)	(602)
Change in valuation of liabilities for investment contracts	(19)	(18)
Policyholder claims and benefits-Other	34	45	17
Commissions and expenses	256	75	130
Impairment (charges) reversals	(40)	(97)	(1,250)
Other charges	(235)	(700)	(774)
Run-off businesses	30	54	88
Income / (loss) before tax	2,534	610	(514)
Segment total [member]
Disclosure of reconciliation from underlying earnings before tax to income before tax [Line Items]
Underlying earnings before tax	2,103	1,913	1,867
Income / (loss) before tax	€ 2,579	€ 641	€ (482)

Segment Information - Summar179

Segment Information - Summary of Other Selected Income Statement Items (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of other selected income statement [line items]
Amortization of deferred expenses, VOBA and future servicing rights	€ 586	€ 1,065	€ 1,261
Depreciation	105	89	84
Impairment charges / (reversals) on financial assets, excluding receivables	42	59	(24)
Impairment charges / (reversals) on non- financial assets and receivables		36	1,275
Operating segments [member] | Americas [member]
Disclosure of other selected income statement [line items]
Amortization of deferred expenses, VOBA and future servicing rights	336	761	731
Depreciation	44	38	31
Impairment charges / (reversals) on financial assets, excluding receivables	19	35	(68)
Impairment charges / (reversals) on non- financial assets and receivables	(2)	7
Operating segments [member] | The Netherlands [member]
Disclosure of other selected income statement [line items]
Amortization of deferred expenses, VOBA and future servicing rights	27	32	39
Depreciation	16	17	17
Impairment charges / (reversals) on financial assets, excluding receivables	17	12	20
Impairment charges / (reversals) on non- financial assets and receivables	3	(2)	2
Operating segments [member] | United Kingdom [member]
Disclosure of other selected income statement [line items]
Amortization of deferred expenses, VOBA and future servicing rights	134	177	377
Depreciation	28	21	23
Impairment charges / (reversals) on non- financial assets and receivables		31	1,274
Operating segments [member] | Central & Eastern Europe [member]
Disclosure of other selected income statement [line items]
Amortization of deferred expenses, VOBA and future servicing rights	55	59	80
Depreciation	8	9	9
Impairment charges / (reversals) on financial assets, excluding receivables	2	(1)	2
Impairment charges / (reversals) on non- financial assets and receivables		(1)
Operating segments [member] | Spain & Portugal [member]
Disclosure of other selected income statement [line items]
Depreciation	3	3	2
Impairment charges / (reversals) on financial assets, excluding receivables			21
Operating segments [member] | Asia [member]
Disclosure of other selected income statement [line items]
Amortization of deferred expenses, VOBA and future servicing rights	33	32	34
Depreciation	1	1	€ 1
Impairment charges / (reversals) on financial assets, excluding receivables		1
Operating segments [member] | Holding and other activities [member]
Disclosure of other selected income statement [line items]
Depreciation	2	2
Impairment charges / (reversals) on financial assets, excluding receivables	3	7
Operating segments [member] | Asset management [member]
Disclosure of other selected income statement [line items]
Depreciation	€ 3
Impairment charges / (reversals) on financial assets, excluding receivables		5
Eliminations [member]
Disclosure of other selected income statement [line items]
Amortization of deferred expenses, VOBA and future servicing rights		€ 2

Segment Information - Summar180

Segment Information - Summary of Number of Employees (Detail) - Employees	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of number of employees [line items]
Number of employees	28,318	29,380	31,530
Americas [member]
Disclosure of number of employees [line items]
Number of employees	10,951	11,943	12,701
The Netherlands [member]
Disclosure of number of employees [line items]
Number of employees	3,089	4,464	4,503
United Kingdom [member]
Disclosure of number of employees [line items]
Number of employees	3,435	2,673	2,478
Central & Eastern Europe [member]
Disclosure of number of employees [line items]
Number of employees	2,337	2,317	2,470
Spain & Portugal [member]
Disclosure of number of employees [line items]
Number of employees	610	600	534
Asia [member]
Disclosure of number of employees [line items]
Number of employees	6,025	5,579	7,163
Joint ventures and associates [member]
Disclosure of number of employees [line items]
Number of employees	6,497	5,944	7,499
Joint ventures and associates [member] | Americas [member]
Disclosure of number of employees [line items]
Number of employees	549	561	545
Joint ventures and associates [member] | Spain & Portugal [member]
Disclosure of number of employees [line items]
Number of employees	83	41	33
Joint ventures and associates [member] | Asia [member]
Disclosure of number of employees [line items]
Number of employees	5,702	5,186	6,780
Asset management [member]
Disclosure of number of employees [line items]
Number of employees	1,500	1,474	1,382
Asset management [member] | Joint ventures and associates [member]
Disclosure of number of employees [line items]
Number of employees	163	156	141
Holding and other activities [member]
Disclosure of number of employees [line items]
Number of employees	371	330	299

Segment Information - Summar181

Segment Information - Summary of Assets and Liabilities Per Segment (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	€ 10,768	€ 11,347	€ 9,594
Assets held for sale	5,249	8,705
Investments	136,804	156,303
Investments for account of policyholders	194,063	203,610
Investments in joint ventures	1,712	1,614	1,561
Investments in associates	308	270
Deferred expenses	10,135	11,423
Other assets	36,883	32,152
Assets	395,923	425,425
Liabilities
Insurance contracts	110,818	119,569
Insurance contracts for account of policyholders	122,168	120,929
Investment contracts	16,943	19,572
Investment contracts for account of policyholders	74,434	84,774	€ 90,119
Liabilities held for sale	5,003	8,816
Other liabilities	42,456	47,424
Total liabilities	371,821	401,084
Americas [member]
Assets
Cash and cash equivalents	548	928
Investments	73,469	93,046
Investments for account of policyholders	102,964	107,341
Investments in joint ventures	6	7
Investments in associates	77	95
Deferred expenses	8,552	9,351
Other assets	26,628	20,725
Assets	212,245	231,493
Liabilities
Insurance contracts	68,556	75,942
Insurance contracts for account of policyholders	72,501	75,328
Investment contracts	6,824	10,148
Investment contracts for account of policyholders	30,463	32,013
Other liabilities	19,145	21,837
Total liabilities	197,490	215,268
The Netherlands [member]
Assets
Cash and cash equivalents	8,382	7,410
Investments	53,975	53,788
Investments for account of policyholders	26,697	27,985
Investments in joint ventures	1,008	877
Investments in associates	74	21
Deferred expenses	76	84
Other assets	6,763	7,766
Assets	96,975	97,931
Liabilities
Insurance contracts	34,379	34,900
Insurance contracts for account of policyholders	25,587	26,275
Investment contracts	9,787	9,043
Investment contracts for account of policyholders	3,255	3,160
Other liabilities	17,400	19,445
Total liabilities	90,408	92,822
United Kingdom [member]
Assets
Cash and cash equivalents	317	1,010
Assets held for sale	5,249	8,705
Investments	2,011	2,236
Investments for account of policyholders	62,961	66,786
Investments in associates	7	8
Deferred expenses	945	1,084
Other assets	1,840	1,920
Assets	73,331	81,747
Liabilities
Insurance contracts	1,451	1,747
Insurance contracts for account of policyholders	22,862	18,112
Investment contracts	278	355
Investment contracts for account of policyholders	40,482	49,309
Liabilities held for sale	5,003	8,816
Other liabilities	1,103	1,249
Total liabilities	71,178	79,586
Central & Eastern Europe [member]
Assets
Cash and cash equivalents	67	47
Investments	1,055	983
Investments for account of policyholders	1,343	1,418
Investments in associates	6	2
Deferred expenses	70	71
Other assets	245	174
Assets	2,787	2,696
Liabilities
Insurance contracts	624	558
Insurance contracts for account of policyholders	1,109	1,126
Investment contracts	52	24
Investment contracts for account of policyholders	234	292
Other liabilities	365	318
Total liabilities	2,385	2,318
Spain & Portugal [member]
Assets
Cash and cash equivalents	116	92
Investments	720	747
Investments for account of policyholders	105	88
Investments in joint ventures	480	495
Deferred expenses	1	1
Other assets	72	77
Assets	1,494	1,500
Liabilities
Insurance contracts	703	722
Insurance contracts for account of policyholders	108	89
Other liabilities	250	238
Total liabilities	1,061	1,049
Asia [member]
Assets
Cash and cash equivalents	71	271
Investments	5,326	5,328
Investments in joint ventures	118	134
Investments in associates	14	21
Deferred expenses	490	832
Other assets	1,786	2,018
Assets	7,805	8,604
Liabilities
Insurance contracts	6,696	7,466
Investment contracts	2	2
Other liabilities	133	(78)
Total liabilities	6,830	7,390
Asset management [member]
Assets
Cash and cash equivalents	141	183
Investments	157	90
Investments in joint ventures	99	99
Investments in associates	122	125
Other assets	101	109
Assets	620	607
Liabilities
Other liabilities	218	180
Total liabilities	218	180
Holding and other activities [member]
Assets
Cash and cash equivalents	1,125	1,407
Investments	91	85
Investments in joint ventures	1
Investments in associates	8	(1)
Other assets	28,427	29,308
Assets	29,651	30,800
Liabilities
Insurance contracts	24	20
Other liabilities	5,526	6,438
Total liabilities	5,550	6,458
Eliminations [member]
Assets
Investments for account of policyholders	(6)	(7)
Other assets	(28,979)	(29,946)
Assets	(28,985)	(29,952)
Liabilities
Insurance contracts	(1,615)	(1,785)
Other liabilities	(1,684)	(2,203)
Total liabilities	€ (3,299)	€ (3,988)

Segment Information - Summar182

Segment Information - Summary of Investments (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of summarized investment per segment [line items]
Investments for general account	€ 136,804	€ 156,303
Investments for account of policyholders	194,063	203,610
Investments on balance sheet	330,868	359,914
Off-balance sheet investments third parties	481,297	382,776
Total revenue- generating investments	812,165	742,690
Financial assets	134,658	154,304
Investments in real estate	2,147	1,999	€ 1,990
Total investments on balance sheet	330,868	359,914
Investments in joint ventures	1,712	1,614	€ 1,561
Investments in associates	308	270
Other assets	63,034	63,627
Assets	395,923	425,425
Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	88,170	109,860
Loans [member]
Disclosure of summarized investment per segment [line items]
Financial assets	39,368	39,303
Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	200,528	208,066
Investments in real estate [member]
Disclosure of summarized investment per segment [line items]
Investments in real estate	2,801	2,685
Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	1,551	1,314
Investments for account of policyholders	25,370	25,492
Financial assets	1,551	1,314
Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	84,344	103,169
Investments for account of policyholders	24,836	30,305
Financial assets	84,344	103,169
Loans [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	39,368	39,303
Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	9,395	10,519
Investments for account of policyholders	9,072	7,049
Real estate [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	2,147	1,999
Investments for account of policyholders	655	686
Unconsolidated investment funds [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	134,132	140,077
Americas [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	73,469	93,046
Investments for account of policyholders	102,964	107,341
Investments on balance sheet	176,434	200,387
Off-balance sheet investments third parties	212,736	240,072
Total revenue- generating investments	389,170	440,458
Total investments on balance sheet	176,434	200,387
Investments in joint ventures	6	7
Investments in associates	77	95
Other assets	35,728	31,003
Assets	212,245	231,493
Americas [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	59,459	77,918
Americas [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Financial assets	8,831	10,820
Americas [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	107,511	110,906
Americas [member] | Investments in real estate [member]
Disclosure of summarized investment per segment [line items]
Investments in real estate	633	743
Americas [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	567	793
Americas [member] | Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	54,535	70,766
Investments for account of policyholders	3,116	4,779
Americas [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	8,831	10,820
Americas [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	8,904	9,924
Investments for account of policyholders	422	27
Americas [member] | Real estate [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	633	743
Americas [member] | Unconsolidated investment funds [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	99,426	102,534
The Netherlands [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	53,975	53,788
Investments for account of policyholders	26,697	27,985
Investments on balance sheet	80,672	81,774
Off-balance sheet investments third parties	1,759	952
Total revenue- generating investments	82,431	82,725
Total investments on balance sheet	80,672	81,774
Investments in joint ventures	1,008	877
Investments in associates	74	21
Other assets	15,221	15,260
Assets	96,975	97,931
The Netherlands [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	19,841	23,044
The Netherlands [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Financial assets	30,189	28,117
The Netherlands [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	29,147	29,374
The Netherlands [member] | Investments in real estate [member]
Disclosure of summarized investment per segment [line items]
Investments in real estate	1,495	1,238
The Netherlands [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	859	334
Investments for account of policyholders	9,262	9,689
The Netherlands [member] | Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	21,411	23,741
Investments for account of policyholders	13,370	15,434
The Netherlands [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	30,189	28,117
The Netherlands [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	21	358
Investments for account of policyholders	3,788	2,862
The Netherlands [member] | Real estate [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	1,495	1,238
The Netherlands [member] | Unconsolidated investment funds [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	276
United Kingdom [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	2,011	2,236
Investments for account of policyholders	62,961	66,786
Investments on balance sheet	64,972	69,021
Off-balance sheet investments third parties	114,906	5,333
Total revenue- generating investments	179,878	74,354
Total investments on balance sheet	64,972	69,021
Investments in associates	7	8
Other assets	8,352	12,718
Assets	73,331	81,747
United Kingdom [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	2,007	2,152
United Kingdom [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	62,310	66,183
United Kingdom [member] | Investments in real estate [member]
Disclosure of summarized investment per segment [line items]
Investments in real estate	655	686
United Kingdom [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	5	84
Investments for account of policyholders	15,856	15,503
United Kingdom [member] | Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	1,779	2,036
Investments for account of policyholders	8,125	9,847
United Kingdom [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	228	115
Investments for account of policyholders	4,850	4,150
United Kingdom [member] | Real estate [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	655	686
United Kingdom [member] | Unconsolidated investment funds [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	33,476	36,600
Central & Eastern Europe [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	1,055	983
Investments for account of policyholders	1,343	1,418
Investments on balance sheet	2,398	2,401
Off-balance sheet investments third parties	5,709	3,154
Total revenue- generating investments	8,107	5,556
Total investments on balance sheet	2,398	2,401
Investments in associates	6	2
Other assets	383	293
Assets	2,787	2,696
Central & Eastern Europe [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	756	660
Central & Eastern Europe [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Financial assets	275	303
Central & Eastern Europe [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	1,363	1,436
Central & Eastern Europe [member] | Investments in real estate [member]
Disclosure of summarized investment per segment [line items]
Investments in real estate	4	3
Central & Eastern Europe [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	54	35
Investments for account of policyholders	244	295
Central & Eastern Europe [member] | Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	712	633
Investments for account of policyholders	216	235
Central & Eastern Europe [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	275	303
Central & Eastern Europe [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	10	10
Investments for account of policyholders	11	9
Central & Eastern Europe [member] | Real estate [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	4	3
Central & Eastern Europe [member] | Unconsolidated investment funds [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	873	879
Spain & Portugal [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	720	747
Investments for account of policyholders	105	88
Investments on balance sheet	825	834
Off-balance sheet investments third parties	528	507
Total revenue- generating investments	1,353	1,342
Total investments on balance sheet	825	834
Investments in joint ventures	480	495
Other assets	189	170
Assets	1,494	1,500
Spain & Portugal [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	651	687
Spain & Portugal [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Financial assets	54	45
Spain & Portugal [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	105	88
Spain & Portugal [member] | Investments in real estate [member]
Disclosure of summarized investment per segment [line items]
Investments in real estate	15	15
Spain & Portugal [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	5	4
Investments for account of policyholders	14	13
Spain & Portugal [member] | Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	646	683
Investments for account of policyholders	9	10
Spain & Portugal [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	54	45
Spain & Portugal [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	1	1
Spain & Portugal [member] | Real estate [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	15	15
Spain & Portugal [member] | Unconsolidated investment funds [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	81	64
Asia [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	5,326	5,328
Investments on balance sheet	5,326	5,328
Off-balance sheet investments third parties	2,718	2,734
Total revenue- generating investments	8,043	8,061
Total investments on balance sheet	5,326	5,328
Investments in joint ventures	118	134
Investments in associates	14	21
Other assets	2,347	3,122
Assets	7,805	8,604
Asia [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	5,299	5,289
Asia [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Financial assets	6	18
Asia [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	21	21
Asia [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	1
Asia [member] | Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	5,252	5,310
Asia [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	6	18
Asia [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	67
Asset management [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	157	90
Investments on balance sheet	157	90
Off-balance sheet investments third parties	143,923	130,889
Total revenue- generating investments	144,079	130,979
Total investments on balance sheet	157	90
Investments in joint ventures	99	99
Investments in associates	122	125
Other assets	242	293
Assets	620	607
Asset management [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	137	87
Asset management [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	20	4
Asset management [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	2	2
Asset management [member] | Debt securities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	9
Asset management [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	146	88
Holding and other activities [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	91	85
Investments on balance sheet	91	85
Total revenue- generating investments	91	85
Total investments on balance sheet	91	85
Investments in joint ventures	1
Investments in associates	8	(1)
Other assets	29,552	30,715
Assets	29,651	30,800
Holding and other activities [member] | Available-for-sale financial assets [member]
Disclosure of summarized investment per segment [line items]
Financial assets	20	23
Holding and other activities [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Financial assets	13
Holding and other activities [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	57	62
Holding and other activities [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	57	62
Holding and other activities [member] | Loans [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	13
Holding and other activities [member] | Other financial asset [member]
Disclosure of summarized investment per segment [line items]
Investments for general account	20	23
Eliminations [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	(6)	(7)
Investments on balance sheet	(6)	(7)
Off-balance sheet investments third parties	(981)	(864)
Total revenue- generating investments	(987)	(871)
Total investments on balance sheet	(6)	(7)
Other assets	(28,979)	(29,946)
Assets	(28,985)	(29,952)
Eliminations [member] | Financial assets at fair value through profit or loss [member]
Disclosure of summarized investment per segment [line items]
Financial assets	(6)	(7)
Eliminations [member] | Shares [member]
Disclosure of summarized investment per segment [line items]
Investments for account of policyholders	€ (6)	€ (7)

Premium Income and Premiums 183

Premium Income and Premiums Paid to Reinsurers - Summary of Premium Income (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	€ 22,826	€ 23,453	€ 22,925
Life insurance general account [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	19,952	20,400	19,583
Non-life insurance [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	2,874	3,053	3,342
accident and health insurance [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	2,511	2,609	2,703
General insurance [member]
Disclosure of insurance premium revenue [line items]
Income arising from insurance contracts	€ 363	€ 444	€ 640

Premium Income and Premiums 184

Premium Income and Premiums Paid to Reinsurers - Summary of Premiums Paid to Reinsurers- Premium Income and Premiums Paid to Reinsurers - Summary of Premium Income (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Expenses arising from reinsurance held	€ 3,431	€ 3,176	€ 2,979
Life insurance general account [member]
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Expenses arising from reinsurance held	3,214	2,932	2,694
Non-life insurance [member]
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Expenses arising from reinsurance held	217	244	286
accident and health insurance [member]
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Expenses arising from reinsurance held	205	238	268
General insurance [member]
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Expenses arising from reinsurance held	€ 13	€ 7	€ 18

Premium Income and Premiums 185

Premium Income and Premiums Paid to Reinsurers - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of insurance premium revenue [line items]
Premium income related to retirement platform	€ 22,826	€ 23,453	€ 22,925
Life insurance general account [member]
Disclosure of insurance premium revenue [line items]
Premium income related to retirement platform	19,952	20,400	€ 19,583
United Kingdom [member] | Life insurance general account [member]
Disclosure of insurance premium revenue [line items]
Premium income related to retirement platform	€ 5,139	€ 5,255

Investment Income - Summary of

Investment Income - Summary of Investment Income (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of investment income [line items]
Interest income	€ 6,052	€ 6,479	€ 7,087
Dividend income	1,164	1,180	1,306
Rental income	121	129	133
Investment income	7,338	7,788	8,525
Aegon N.V [member]
Disclosure of investment income [line items]
Interest income from intercompany loans	65	104
Interest income from derivatives	18	17
Investment income	83	121
Investment income related to general account [member]
Disclosure of investment income [line items]
Investment income	5,394	5,737	6,099
Investment contracts for account of policyholders [member]
Disclosure of investment income [line items]
Investment income	€ 1,944	€ 2,051	€ 2,426

Investment Income - Additional

Investment Income - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of investment income [line items]
Interest income	€ 6,052	€ 6,479	€ 7,087
Fair value interest income	5,056	5,642	5,951
Financial assets impaired [member]
Disclosure of investment income [line items]
Interest income	€ 190	€ 230	€ 223

Investment Income - Summary 188

Investment Income - Summary of Investment Income From Financial Assets (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about investment income [line items]
Investment income	€ 7,338	€ 7,788	€ 8,525
Investment income related to general account [member]
Disclosure of detailed information about investment income [line items]
Investment income	5,394	5,737	6,099
Investment income related to general account [member] | Derivatives [member]
Disclosure of detailed information about investment income [line items]
Investment income	31	(139)	(96)
Investment income related to general account [member] | Available-for-sale financial assets [member]
Disclosure of detailed information about investment income [line items]
Investment income	3,467	4,007	4,235
Investment income related to general account [member] | Loans [member]
Disclosure of detailed information about investment income [line items]
Investment income	1,686	1,752	1,760
Investment income related to general account [member] | Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about investment income [line items]
Investment income	148	80	115
Shares [member]
Disclosure of detailed information about investment income [line items]
Investment income	1,164	1,180	1,306
Debt securities [member]
Disclosure of detailed information about investment income [line items]
Investment income	4,248	4,838	5,332
Loans [member]
Disclosure of detailed information about investment income [line items]
Investment income	1,686	1,752	1,760
Real estate [member]
Disclosure of detailed information about investment income [line items]
Investment income	121	129	133
Real estate [member] | Investment income related to general account [member]
Disclosure of detailed information about investment income [line items]
Investment income	71	69	61
Other [member]
Disclosure of detailed information about investment income [line items]
Investment income	119	(111)	(6)
Other [member] | Investment income related to general account [member]
Disclosure of detailed information about investment income [line items]
Investment income	€ (10)	€ (32)	€ 25

Fee and Commission Income - Sum

Fee and Commission Income - Summary of Fee and Commission Income (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fee and commission income (expense) [abstract]
Fee income from asset management	€ 2,126	€ 1,702	€ 1,648
Commission income	535	562	614
Other	140	144	176
Total fee and commission income	€ 2,802	€ 2,408	€ 2,438

Fee and Commission Income - Add

Fee and Commission Income - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fee and commission income (expense) [abstract]
Fee and commission income on trust and fiduciary activities	€ 190	€ 55	€ 56
Increase in fee and commission income on trust and fiduciary activities due to acquisition of Cofunds in UK	€ 134

Income From Reinsurance Ceded -

Income From Reinsurance Ceded - Summary of Income From Reinsurance Ceded (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Income From Reinsurance Ceded [Abstract]
Recovered claims and benefits	€ 3,669	€ 3,477	€ 2,784
Change in technical provisions	497	(26)	309
Commissions	122	236	227
Total	€ 4,288	€ 3,687	€ 3,321

Results From Financial Trans192

Results From Financial Transactions - Summary of Financial Transactions Results (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of results from financial transactions [Abstract]
Net fair value change of general account financial investments at fair value through profit or loss, other than derivatives	€ 232	€ (42)	€ (35)
Realized gains and (losses) on financial investments	431	327	349
Gains and (losses) on investments in real estate	193	70	145
Net fair value change of derivatives	(1,159)	239	123
Net fair value change on for account of policyholder financial assets at fair value through profit or loss	20,524	15,121	(110)
Net fair value change on investments in real estate for account of policyholders	38	(26)	67
Net foreign currency gains and (losses)	(20)	41	(29)
Net fair value change on borrowings and other financial liabilities	10	21	9
Realized gains and (losses) on repurchased debt	1	1	2
Total	€ 20,250	€ 15,753	€ 521

Results From Financial Trans193

Results From Financial Transactions - Summary of Net Fair Value Changes of Financial Investments at Fair Value Through Profit or Loss, Other Than Derivatives (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of financial instruments at fair value through profit or loss [line items]
Net Fair Value Change of Financial Investments at fair value through profit or loss	€ 232	€ (42)	€ (35)
Shares [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net Fair Value Change of Financial Investments at fair value through profit or loss	25	4
Debt securities and money market investments [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net Fair Value Change of Financial Investments at fair value through profit or loss	127	8	(24)
Other [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net Fair Value Change of Financial Investments at fair value through profit or loss	€ 80	€ (54)	€ (12)

Results From Financial Trans194

Results From Financial Transactions - Summary of Realized Gains and Losses on Financial Investments (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	€ 431	€ 327	€ 349
Shares [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	165	46	44
Debt securities and money market investments [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	242	211	346
Loans [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	20	16	20
Other [member]
Realized gains and losses on financial investments [line items]
Realized gains and losses on financial investments	€ 3	€ 54	€ (60)

Results From Financial Trans195

Results From Financial Transactions - Summary of Net Fair Value Change of Derivatives (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net fair value change of derivatives [Abstract]
Net fair value change on economic hedges where no hedge accounting is applied	€ 70	€ 793	€ (500)
Net fair value change on bifurcated embedded derivatives	(1,231)	(565)	614
Ineffective portion of hedge transactions to which hedge accounting is applied	2	12	8
Total	€ (1,159)	€ 239	€ 123

Results From Financial Trans196

Results From Financial Transactions - Summary of Ineffective Portion of Hedge Transactions (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about hedged items [line items]
Ineffectiveness cash flow hedges	€ (13)	€ (37)	€ (13)
Total	2	12	8
Non-cash changes [member]
Disclosure of detailed information about hedged items [line items]
Ineffectiveness cash flow hedges	3	7	5
Total	(6)	26	(17)
Cash flow hedges [member]
Disclosure of detailed information about hedged items [line items]
Ineffectiveness cash flow hedges		5	4
Hedged item [member]
Disclosure of detailed information about hedged items [line items]
Fair value change on hedged items in a fair value hedge	15	35	54
Hedging instrument [member]
Disclosure of detailed information about hedged items [line items]
Fair value change on hedged items in a fair value hedge	€ (12)	€ (29)	€ (49)

Results From Financial Trans197

Results From Financial Transactions - Summary of Net Fair Value Change on for Account of Policyholder Financial Assets at Fair Value Through Profit or Loss (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of financial instruments at fair value through profit or loss [line items]
Net fair value changes of financial assets at fair value through profit or loss	€ 20,524	€ 15,121	€ (110)
Shares [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net fair value changes of financial assets at fair value through profit or loss	2,372	2,462	706
Debt securities and money market investments [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net fair value changes of financial assets at fair value through profit or loss	166	1,682	(529)
Unconsolidated investment funds [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net fair value changes of financial assets at fair value through profit or loss	17,720	10,496	(356)
Derivatives [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net fair value changes of financial assets at fair value through profit or loss	94	252	€ 69
Other financial asset [member]
Disclosure of financial instruments at fair value through profit or loss [line items]
Net fair value changes of financial assets at fair value through profit or loss	€ 171	€ 230

Other Income - Summary of Other

Other Income - Summary of Other Income (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Other Operating Income [Abstract]
Other income	€ 540	€ 66	€ 83

Other Income - Additional Infor

Other Income - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2017GBP (£)	Dec. 31, 2016USD ($)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of other operating income [line items]
Other income		€ 540			€ 66	€ 83
Release of expense reserves		82	£ 71
Other income earn out provision						€ 38
Payout annuity business and Bank Owned Life Insurance / Corporate Owned Life Insurance business [member]
Disclosure of other operating income [line items]
Other income	$ 250	231
Unirobe Meeus Groep B.V. [member]
Disclosure of other operating income [line items]
Other income		208
Legal & General [Member]
Disclosure of other operating income [line items]
Other income		17	14
Transamerica financial advisors [member]
Disclosure of other operating income [line items]
Other income					66
Gain from sale of business				$ 58	€ 52
Seven investment management (7IM) [member]
Disclosure of other operating income [line items]
Gain from sale of business		€ 10	£ 7
Other income from sale percentage of share	25.10%	25.10%	25.10%
Clark consulting [member]
Disclosure of other operating income [line items]
Gain from sale of business	$ 8	€ 7

Policyholder Claims and Bene200

Policyholder Claims and Benefits - Summary of Policyholder Claims and Benefits (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detail information about policyholder claims and benefits paid [line items]
Change in valuation of liabilities for insurance contracts	€ 22,741	€ 16,193	€ 7,880
Change in valuation of liabilities for investment contracts	19	18
Other	(34)	(45)	(17)
Total	45,599	41,974	26,443
Life insurance general account [member]
Disclosure of detail information about policyholder claims and benefits paid [line items]
Benefits and claims paid life	23,634	23,877	23,130
Non-life insurance [member]
Disclosure of detail information about policyholder claims and benefits paid [line items]
Benefits and claims paid life	1,903	2,052	2,128
Investment contracts 1 [member]
Disclosure of detail information about policyholder claims and benefits paid [line items]
Change in valuation of liabilities for investment contracts	€ (2,644)	€ (104)	€ (6,678)

Policyholder Claims and Bene201

Policyholder Claims and Benefits - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Claims And Benefits Paid [Abstract]
Fair value changes on for account of policyholder financial assets	€ 20,524	€ 15,121	€ (110)
Increase of technical provisions for life insurance contracts	€ 601	€ 2,349	€ 3,410

Profit Sharing and Rebates - Su

Profit Sharing and Rebates - Summary of Profit Sharing and Rebates (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Profit Sharing And Rebates [abstract]
Surplus interest bonuses	€ 2	€ 4	€ 2
Profit appropriated to policyholders	21	45	29
Total	€ 23	€ 49	€ 31

Commissions and Expenses - Summ

Commissions and Expenses - Summary of Commissions and Expenses (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of commissions and expenses [line items]
Commissions	€ 2,661	€ 2,929	€ 3,313
Employee expenses	2,234	2,287	2,280
Administration expenses	1,424	1,273	1,278
Deferred expenses	(980)	(1,203)	(1,533)
Amortization of deferred expenses	543	880	1,143
Amortization of VOBA and future servicing rights	43	184	117
Total	5,925	6,351	€ 6,598
Aegon N.V [member]
Disclosure of commissions and expenses [line items]
Employee expenses	80	80
Administration expenses	78	73
Cost sharing	(76)	(85)
Total	€ 82	€ 68

Commissions and Expenses - Addi

Commissions and Expenses - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Commissions And Expenses [Abstract]
Depreciation expense included in administration expenses	€ 105	€ 89	€ 84
Minimum lease payments recognized as expense	18	17	19
Amount included in employee expenses relating to defined contributions	€ 46	€ 46	€ 51
Performance period	1 year
Vesting period	2 years
Performance period	The performance indicators apply over a performance period of one year
Performance period	For members of the Executive Board and the Management Board all variable compensation has vested after three years following the performance period. At vesting, the variable compensation is transferred to the individual employees.

Commissions and Expenses - S205

Commissions and Expenses - Summary of Employee Expenses (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Classes of employee benefits expense [abstract]
Salaries	€ 1,470	€ 1,471	€ 1,462
Post-employment benefit costs	318	338	335
Social security charges	151	155	145
Other personnel costs	267	294	320
Shares, share appreciation rights, share options	28	28	17
Total	€ 2,234	€ 2,287	€ 2,280

Commissions and Expenses - S206

Commissions and Expenses - Summary of Shares Provided in Active Plans for Long Term Incentive and Variable Compensation Identified Staff (Detail)	12 Months Ended
	Dec. 31, 2017shares€ / shares	Dec. 31, 2016shares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		45,211,581
Beginning balance	19,649,855	23,603,464
Number of shares conditionally granted	6,722,418	6,809,814
Number of shares allocated	395,386	(358,841)
Number of shares forfeited	295,591	329,410
Number of shares vested	6,542,411	10,075,172
Ending balance	19,929,657	19,649,855
2007 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		18,506
Beginning balance		9,253
Number of shares allocated		280
Number of shares vested		9,533
2011 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		6,452,535
Average share price used for grant in EUR | € / shares	€ 4.727
2011 [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	3.915
2011 [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	4.581
2012 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		13,392,200
Beginning balance		6,584,783
Number of shares forfeited		76,435
Number of shares vested		6,508,348
Average share price used for grant in EUR | € / shares	3.126
2012 [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	2.260
2012 [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	€ 2.886
2013 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		8,536,076
Beginning balance	4,104,560	7,458,390
Number of shares allocated		(45,557)
Number of shares forfeited		141,013
Number of shares vested	4,104,560	3,167,260
Ending balance		4,104,560
Average share price used for grant in EUR | € / shares	€ 4.917
2013 [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	3.900
2013 [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	€ 4.684
2014 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		4,714,569
Beginning balance	4,181,844	4,372,405
Number of shares allocated	49,780	16,937
Number of shares forfeited	42,580	95,977
Number of shares vested	1,887,728	111,521
Ending balance	2,301,316	4,181,844
Average share price used for grant in EUR | € / shares	€ 6.739
2014 [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	5.840
2014 [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	€ 6.658
2015 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		4,942,275
Beginning balance	4,553,637	5,178,633
Number of shares allocated		(330,501)
Number of shares forfeited	116,505	15,985
Number of shares vested	122,638	278,510
Ending balance	4,314,494	4,553,637
Average share price used for grant in EUR | € / shares	€ 6.106
2015 [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	5.159
2015 [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	€ 6.018
2016 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares allocated		7,155,420
Beginning balance	6,809,814
Number of shares conditionally granted		6,809,814
Number of shares allocated	345,606
Number of shares forfeited	136,506
Number of shares vested	427,485
Ending balance	6,591,429	6,809,814
Average share price used for grant in EUR | € / shares	€ 5.128
2016 [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	3.990
2016 [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	€ 4.898
2017 [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of shares conditionally granted	6,722,418
Ending balance	6,722,418
Average share price used for grant in EUR | € / shares	€ 5.246
2017 [member] | Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	4.040
2017 [member] | Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value of shares at grant date in EUR | € / shares	€ 4.933

Impairment Charges _ (Revers207

Impairment Charges / (Reversals) - Summary of Impairment Charges / (Reversals) (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of impairment loss and reversal of impairment loss [abstract]
Impairment charges on financial assets, excluding receivables	€ 74	€ 117	€ 95
Impairment reversals on financial assets, excluding receivables	(32)	(58)	(119)
Impairment charges and reversals on non-financial assets and receivables		36	1,275
Total	€ 42	€ 95	€ 1,251

Impairment Charges _ (Revers208

Impairment Charges / (Reversals) - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	€ 42	€ 95	€ 1,251
United Kingdom [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment loss (reversal of impairment loss) recognised in profit or loss			€ 1,274

Impairment Charges _ (Revers209

Impairment Charges / (Reversals) - Summary of Impairment Reversals on Financial Assets, Excluding Receivables (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets, excludes receivables	€ 74	€ 117	€ 95
Shares [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets, excludes receivables	2	1	4
Debt securities and money market instruments [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets, excludes receivables	17	53	32
Corporate [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets, excludes receivables	50	23	37
Investments in associates [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets, excludes receivables	€ 4	7
Investments in joint ventures [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets, excludes receivables			€ 21
Other [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment charges on financial assets, excludes receivables		€ 33

Impairment Charges _ (Revers210

Impairment Charges / (Reversals) - Summary of Impairment Charges on Financial Assets, Excluding Receivables (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment reversals on financial assets, excludes receivables	€ (32)	€ (58)	€ (119)
Debt securities and money market instruments [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment reversals on financial assets, excludes receivables	(17)	(42)	(109)
Corporate [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment reversals on financial assets, excludes receivables	(13)	(14)	€ (9)
Other [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment reversals on financial assets, excludes receivables	€ (2)	€ (2)

Interest Charges and Related211

Interest Charges and Related Fees - Summary of Interest Charges and Related Fees (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of interest charges and related fees [line items]
Subordinated loans	€ 34	€ 34	€ 33
Trust pass-through securities	9	9	9
Borrowings	229	210	240
Other	162	95	129
Total	435	347	€ 412
Aegon N.V [member]
Disclosure of interest charges and related fees [line items]
Subordinated borrowings	34	34
Borrowings	62	68
Other	4	4
Total	€ 100	€ 106

Interest Charges and Related212

Interest Charges and Related Fees - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fee income and expense [abstract]
Interest charges accrued on financial assets and liabilities	€ 162	€ 176	€ 269

Other Charges - Summary of Othe

Other Charges - Summary of Other Charges (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of other charges [abstract]
Other charges	€ 235	€ 700	€ 774

Other Charges - Additional Info

Other Charges - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2017GBP (£)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of other charges [line items]
Provision charges		€ 107		€ 92
Other charges		235		700	€ 774
Aegon Ireland Plc [member]
Disclosure of other charges [line items]
Impairment of deferred transaction costs		36	£ 32
United Kingdom [member]
Disclosure of other charges [line items]
Loss on sale of the UK annuity portfolio				682
Poland [member]
Disclosure of other charges [line items]
Fees payable upon purchase or surrender of unit-linked policies				€ 19
Canada [member]
Disclosure of other charges [line items]
Loss on sale of Canadian life insurance					€ 774
Americas [member]
Disclosure of other charges [line items]
Loss on divestment of a block of life reinsurance business in the Americas	$ 119	105
Americas [member] | Litigation provision [member]
Disclosure of other charges [line items]
Provision charges	$ 100	€ 85

Income Taxes - Summary of the C

Income Taxes - Summary of the Components of Income Tax for Period (Income) / Charge (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current tax
Current year	€ 220	€ 33	€ 111
Adjustments to prior years	47	(46)	(70)
Current tax	267	(13)	42
Deferred tax
Origination / (reversal) of temporary differences	397	102	(169)
Changes in tax rates / bases	(550)	93	(22)
Changes in deferred tax assets as a result of recognition / write off of previously not recognized / recognized tax losses, tax credits and deductible temporary differences	(45)	(54)	(8)
Non-recognition of deferred tax assets	41	33	22
Adjustments to prior years	(45)	12	53
Deferred tax	(201)	185	(125)
Income tax (expense) / benefit	€ 65	€ 172	€ (83)

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation Between Standard and Effective Income Tax (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation between standard and effective income tax:
Income before tax	€ 2,534	€ 610	€ (514)
Income tax calculated using weighted average applicable statutory rates	745	239	(57)
Difference due to the effects of:
Non-taxable income	(157)	(126)	43
Non-tax deductible expenses	28	21	49
Changes in tax rate/base	(550)	93	(22)
Different tax rates on overseas earnings	(1)	8	6
Tax credits	(67)	(41)	(100)
Other taxes	67	38	14
Adjustments to prior years	2	(34)	(17)
Origination and change in contingencies	9	8	3
Changes in deferred tax assets as a result of recognition / write off of previously not recognized / recognized tax losses, tax credits and deductible temporary differences	(45)	(54)	(8)
Non-recognition of deferred tax assets	41	33	22
Tax effect of (profit) / losses from joint ventures and associates	(7)	(7)	(8)
Other	(1)	(6)	(8)
Difference due to effects of income tax	(680)	(67)	(27)
Income tax (expense) / benefit	€ 65	€ 172	€ (83)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - EUR (€) € in Millions	Apr. 01, 2020	Apr. 01, 2017	Jan. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income tax expense benefits [line items]
Weighted average applicable statutory tax rate					29.40%	39.20%	11.00%
Deferred tax benefit caused by decrease of the United States corporate income tax rate					€ 479
Hungary [member]
Income tax expense benefits [line items]
Corporate income tax rate						19.00%
United States [member]
Income tax expense benefits [line items]
Corporate income tax rate					35.00%
Changes in tax rates or tax laws enacted or announced [member] | United Kingdom [member]
Income tax expense benefits [line items]
Corporate income tax rate	17.00%	19.00%
Changes in tax rates or tax laws enacted or announced [member] | Hungary [member]
Income tax expense benefits [line items]
Corporate income tax rate			9.00%
Scenario, Forecast [Member] | United States [member]
Income tax expense benefits [line items]
Corporate income tax rate				21.00%

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Tax Related to Components of Other Comprehensive Income and Retained Earnings (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Items that will not be reclassified to profit and loss:
Changes in revaluation reserve real estate held for own use	€ 9	€ (3)	€ (2)
Remeasurements of defined benefit plans	(175)	89	(75)
Income tax will not be reclassified to profit or loss	(166)	86	(77)
Items that may be reclassified subsequently to profit and loss:
Gains / losses on revaluation of available-for-sale investments	(134)	(187)	810
Gains / losses transferred to the income statement on disposal and impairment of available- for-sale investments	441	427	124
Changes in cash flow hedging reserve	567	24	(98)
Movement in foreign currency translation and net foreign investment hedging reserve	76	(39)	(52)
Income tax will be reclassified to profit or loss	951	225	783
Total income tax related to components of other comprehensive income	785	311	706
Income tax related to equity instruments and other
Income tax related to equity instruments	44	44	46
Other	14	(3)
Total income tax recognised directly in retained earnings	€ 58	€ 41	€ 46

Earnings Per Share - Summary of

Earnings Per Share - Summary of Basic Earnings Per Share (Detail) - EUR (€) € / shares in Units, € in Millions, shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings per share [line items]
Owners of Aegon N.V.	€ 2,469	€ 437	€ (432)
Coupons on perpetual securities	(103)	(105)	(111)
Coupons on non-cumulative subordinated notes	(28)	(28)	(28)
Net income / (loss) attributable to owners for basic earnings per share calculation	2,338	304	(571)
Net income / (loss) attributable to common shareholders	€ 2,321	€ 302	€ (567)
Weighted average number of common shares B outstanding (in million)	2,042	2,048	2,101
Basic earnings per common share (EUR per share)	€ 1.14	€ 0.15	€ (0.27)
Common share B [member]
Earnings per share [line items]
Net income / (loss) attributable to common shareholders	€ 16	€ 2	€ (4)
Weighted average number of common shares B outstanding (in million)	575	575	584
Basic earnings per common share (EUR per share)	€ 0.03		€ (0.01)

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017shares
Basic earnings per share [abstract]
Diluted outstanding share options	0

Dividend Per Common Share - Add

Dividend Per Common Share - Additional Information (Detail) - € / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information of dividends [line items]
Dividend per common share	€ 0.27
Common shares B [member]
Disclosure of detailed information of dividends [line items]
Proposed dividend	0.00675
Dividends paid on common shares	0	€ 0
Final dividend 2017 [member]
Disclosure of detailed information of dividends [line items]
Dividend per common share	0.14
Final dividend 2017 [member] | Common shares B [member]
Disclosure of detailed information of dividends [line items]
Dividend per common share	0.0035
Interim dividend 2017 [member]
Disclosure of detailed information of dividends [line items]
Dividend per common share	€ 0.13
Percentage of shareholders receive cash dividend	57.00%
Percentage of shareholders receive stock dividend	43.00%
Cash dividend payable per common share	€ 0.13
Stock dividend payable description	The stock dividend amounted to one new Aegon common share for every 36 common shares held.
Dividend payable, date to be paid	Sep. 15, 2017
Stock repurchase program to repurchase common shares	51,864,626
Period of repurchase	Between October 2, 2017, and December 15, 2017
Common shares repurchased average price per share	€ 5.0950
Interim dividend 2017 [member] | Common shares B [member]
Disclosure of detailed information of dividends [line items]
Proposed dividend	0.00325
Dividends paid on common shares	€ 0
Final dividend 2016 [member]
Disclosure of detailed information of dividends [line items]
Percentage of shareholders receive cash dividend	54.00%
Percentage of shareholders receive stock dividend	46.00%
Stock dividend payable description	One new Aegon common share for every 35 common shares held.
Dividend payable, date to be paid	Jun. 23, 2017
Dividend per common share	€ 0.13
Interim dividend 2016 [member]
Disclosure of detailed information of dividends [line items]
Percentage of shareholders receive cash dividend		58.00%
Percentage of shareholders receive stock dividend		42.00%
Cash dividend payable per common share		€ 0.13
Stock dividend payable description		The stock dividend amounted to one new Aegon common share for every 28 common shares held.
Dividend payable, date to be paid		Sep. 16, 2016
Stock repurchase program to repurchase common shares		30,765,224
Period of repurchase		Between October 3, 2016, and November 11, 2016
Common shares repurchased average price per share		€ 3.8406
Interim dividend 2016 [member] | Common shares B [member]
Disclosure of detailed information of dividends [line items]
Dividends paid on common shares		0
Final dividend 2015 [member]
Disclosure of detailed information of dividends [line items]
Dividend per common share		€ 0.13
Percentage of shareholders receive cash dividend		57.00%
Percentage of shareholders receive stock dividend		43.00%
Stock dividend payable description		One new Aegon common share for every 30 common shares held.
Dividend payable, date to be paid		Jun. 24, 2016
Interim dividend 2015 [member]
Disclosure of detailed information of dividends [line items]
Dividends paid on common shares			€ 0
Percentage of shareholders receive cash dividend			57.00%
Percentage of shareholders receive stock dividend			43.00%
Cash dividend payable per common share			€ 0.12
Stock dividend payable description			45 common shares held
Dividend payable, date to be paid			Sep. 18, 2015
Stock repurchase program to repurchase common shares			20,136,673
Period of repurchase			Between September 16, 2015, and October 13, 2015
Common shares repurchased average price per share			€ 5.2777
Final dividend 2015 [member]
Disclosure of detailed information of dividends [line items]
Stock repurchase program to repurchase common shares		29,258,662
Period of repurchase		Between July 4, 2016, and August 12, 2016
Common shares repurchased average price per share		€ 3.5054

Cash and Cash Equivalents - Sum

Cash and Cash Equivalents - Summary of Detailed Information about Cash and Cash Equivalents (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash and cash equivalents [abstract]
Cash at bank and in hand	€ 3,720	€ 3,727	€ 2,199
Short-term deposits	2,544	3,666	3,614
Money market investments	4,496	3,939	3,318
Short-term collateral	7	16	463
At December 31	€ 10,768	€ 11,347	€ 9,594

Cash and Cash Equivalents - Add

Cash and Cash Equivalents - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Detailed information about cash and cash equivalents [line items]
Cash received on repurchase agreements	€ 1,373	€ 1,489
Cash collateral on securities lended	€ (3,277)	€ (3,633)
Weighted effective interest rate on short-term deposits	(0.32%)	(0.17%)
Short-term deposits maturity days	31 days	23 days
Percentage of deposit with agreed maturity	1.00%
Description of cash flow based on valuation of assets	This deposit is renewed every 42-49 days, based on an updated valuation of total assets. The interest received on this deposit is equal to the ECB deposit rate (which was -40bp throughout 2017).
Minimum balance on deposit with Dutch Central Bank	€ 67	€ 63
Effects of changes in exchange rate	(196)	(23)	€ 200
Increase (decrease) in net cash flows from operating activities	2,766	2,405
Net cash flows from (used in) operating activities	553	3,319	914
Increase (decrease) in net cash flows from investing activities	118	1,693
Net cash flows from (used in) investing activities	(1,196)	(1,078)	615
Business combination consideration transferred	52
Transferred cash and cash equivalents amounted to outflow as result of reinsurance transactions and disposal of entities over which control is lost	10,768	11,347	9,594
Increase (decrease) in net cash flows from financing activities	984	2,320
Net cash flows from (used in) financing activities	519	(465)	(2,785)
Disposals [member]
Detailed information about cash and cash equivalents [line items]
Consideration received	299	69
Consideration received in cash and cash equivalents	306	56
Earn-out	7	13
Reinsurance transactions and disposal of entities [member]
Detailed information about cash and cash equivalents [line items]
Transferred cash and cash equivalents amounted to outflow as result of reinsurance transactions and disposal of entities over which control is lost	1,361	1,130
Securities lending [member]
Detailed information about cash and cash equivalents [line items]
Cash received on repurchase agreements	7,000	8,000
Cash collateral on securities lended	7	16
Income from securities lending programs	€ 11	€ 13	€ 8

Cash and Cash Equivalents - Dis

Cash and Cash Equivalents - Disclosure of Cash and Cash Equivalents (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash and cash equivalents [abstract]
Cash and cash equivalents	€ 10,768	€ 11,347	€ 9,594
Cash classified as Assets held for sale	260
Bank overdrafts	(2)	(1)
Bank overdrafts classified as Liabilities held for sale	(1)
Net cash and cash equivalents	€ 11,026	€ 11,346	€ 9,593	€ 10,649

Cash and Cash Equivalents - 225

Cash and Cash Equivalents - Disclosure of Detailed Information of Cash Flow Statement (Detail) - EUR (€) € in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of cash flows [abstract]
Net cash flows from operating activities		€ 553	€ 3,319	€ 914
Net cash flows from investing activities		(1,196)	(1,078)	615
Net cash flows from financing activities		519	(465)	(2,785)
Net increase in cash and cash equivalents	[1]	€ (125)	€ 1,776	€ (1,257)
[1]	Included in net increase / (decrease) in cash and cash equivalents are interest received (2017: EUR 6,215 million, 2016: EUR 6,691 million and 2015: EUR 7,118 million) dividends received (2017: EUR 1,292 million, 2016: EUR 1,387 million and 2015: EUR 1,384 million) and interest paid (2017: EUR 311 million, 2016: EUR 300 million and 2015: EUR 350 million). All included in operating activities except for dividend received from joint ventures and associates (2017: EUR 129 million, 2016: EUR 203 million and 2015: EUR 76 million).

Cash and Cash Equivalents - 226

Cash and Cash Equivalents - Summary of Reconciliation of Liabilities Arising from Financing Activities (Detail) € in Millions	12 Months Ended
	Dec. 31, 2017EUR (€)
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	€ 13,153
Ending balance	13,635
Cash flow hedges [member] | Subordinated borrowings - held at amortized cost [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	767
Amortization	6
Cash flow hedges [member] | Trust pass-through securities - held at amortized cost [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	156
Movements related to fair value hedges	(4)
Cash flow hedges [member] | Borrowings [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	13,153
Addition	9,170
Repayment	(7,918)
Realized gains /losses in income statement	(10)
Amortization	(1)
Other	1
Cash flow hedges [member] | Assets held to hedge Trust pass through securities [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning balance	22
Realized gains /losses in income statement	(4)
Non-cash changes [member] | Subordinated borrowings - held at amortized cost [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Net exchange difference	(9)
Ending balance	764
Non-cash changes [member] | Trust pass-through securities - held at amortized cost [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Net exchange difference	(19)
Ending balance	133
Non-cash changes [member] | Borrowings [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Net exchange difference	(760)
Ending balance	13,635
Non-cash changes [member] | Assets held to hedge Trust pass through securities [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Net exchange difference	(2)
Ending balance	€ 15

Assets and liabilities held 227

Assets and liabilities held for sale - Summary of Assets and Liabilities Classified as Held for Sale (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	€ 10,768	€ 11,347	€ 9,594
Investments	136,804	156,303
Investments for account of policyholders	194,063	203,610
Derivatives	5,912	8,318
Deferred tax assets	79	87
Deferred expenses	10,135	11,423
Other assets and receivables	10,002	10,667
Assets	395,923	425,425
Liabilities
Insurance contracts for account of policyholders	122,168	120,929
Investment contracts for account of policyholders	74,434	84,774
Derivatives	7,130	8,878
Deferred gains	13	64	€ 112
Other liabilities	15,208	16,978
Accruals	329	237
Total liabilities	371,821	€ 401,084
Assets and liabilities classified as held for sale [member]
Assets
Cash and cash equivalents	260
Investments	139
Investments for account of policyholders	4,775
Derivatives	57
Deferred tax assets	5
Deferred expenses	6
Other assets and receivables	7
Assets	5,249
Liabilities
Insurance contracts for account of policyholders	1,346
Investment contracts for account of policyholders	3,518
Derivatives	74
Deferred gains	43
Other liabilities	18
Accruals	3
Total liabilities	€ 5,003

Assets and Liabilities Held 228

Assets and Liabilities Held for Sale - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017EUR (€)
Disclosure of fair value measurement of assets and liabilities [abstract]
Unrealized gains relating to non-current assets and disposal groups classified as held for sale	€ 0

Assets and Liabilities Held 229

Assets and Liabilities Held for Sale - Summary of Fair Value of Financial Assets and Liabilities Measured at Fair Value (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Financial assets	€ 134,658	€ 154,304
Shares [member]
Disclosure of financial assets [line items]
Financial assets	1,551	1,314
Financial assets at fair value through profit or loss [member]
Disclosure of financial assets [line items]
Financial assets	200,528	€ 208,066
Fair value [member]
Disclosure of financial assets [line items]
Financial assets	141,858
Financial liabilities	3,592
Fair value [member] | Investment contracts for account of policyholders [member]
Disclosure of financial assets [line items]
Financial liabilities	3,518
Fair value [member] | Derivative [member]
Disclosure of financial assets [line items]
Financial liabilities	74
Fair value [member] | Financial assets at fair value through profit or loss [member]
Disclosure of financial assets [line items]
Financial assets	4,971
Fair value [member] | Financial assets at fair value through profit or loss [member] | Shares [member]
Disclosure of financial assets [line items]
Financial assets	139
Fair value [member] | Financial assets at fair value through profit or loss [member] | Investment contracts for account of policyholders [member]
Disclosure of financial assets [line items]
Financial assets	4,775
Fair value [member] | Financial assets at fair value through profit or loss [member] | Derivatives [member]
Disclosure of financial assets [line items]
Financial assets	57
Fair value [member] | Level I [member] | Financial assets at fair value through profit or loss [member]
Disclosure of financial assets [line items]
Financial assets	1,837
Fair value [member] | Level I [member] | Financial assets at fair value through profit or loss [member] | Shares [member]
Disclosure of financial assets [line items]
Financial assets	139
Fair value [member] | Level I [member] | Financial assets at fair value through profit or loss [member] | Investment contracts for account of policyholders [member]
Disclosure of financial assets [line items]
Financial assets	1,699
Fair value [member] | Level II [member]
Disclosure of financial assets [line items]
Financial liabilities	3,559
Fair value [member] | Level II [member] | Investment contracts for account of policyholders [member]
Disclosure of financial assets [line items]
Financial liabilities	3,518
Fair value [member] | Level II [member] | Derivative [member]
Disclosure of financial assets [line items]
Financial liabilities	41
Fair value [member] | Level II [member] | Financial assets at fair value through profit or loss [member]
Disclosure of financial assets [line items]
Financial assets	3,133
Fair value [member] | Level II [member] | Financial assets at fair value through profit or loss [member] | Investment contracts for account of policyholders [member]
Disclosure of financial assets [line items]
Financial assets	3,076
Fair value [member] | Level II [member] | Financial assets at fair value through profit or loss [member] | Derivatives [member]
Disclosure of financial assets [line items]
Financial assets	57
Fair value [member] | Level III [member]
Disclosure of financial assets [line items]
Financial liabilities	33
Fair value [member] | Level III [member] | Derivative [member]
Disclosure of financial assets [line items]
Financial liabilities	€ 33

Investments - Summary of Invest

Investments - Summary of Investments for General Accounts Comprise Financial Assets Excluding Derivatives And Investments in Real Estate (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of investments in financial assets and real estate [Abstract]
Available-for-sale (AFS)	€ 88,170	€ 109,860
Loans	39,368	39,303
Financial assets at fair value through profit or loss (FVTPL)	7,119	5,142
Total financial assets, excluding derivatives	134,658	154,304
Investments in real estate	2,147	1,999	€ 1,990
Total investments for general account	€ 136,804	€ 156,303

Investments - Additional Inform

Investments - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of investments in financial assets and real estate [Line Items]
Decrease in financial assets, for general account, excluding derivatives	€ 19,600
Current financial assets	€ 13,749	€ 15,729
Percentage of properties appraised	95.00%	78.00%
Percentage of properties appraised performed by independent external appraisers	99.00%	98.00%
Investments in real estate	€ 2,147	€ 1,999	€ 1,990
Rental income	71	69	61
Direct operating expense from investment property generating rental income	21	79	97
Direct operating expense from investment property not generating rental income	1	1	€ 1
Aegon Americas [member]
Disclosure of investments in financial assets and real estate [Line Items]
Investments in real estate	€ 633	743
Remaining lease terms of non-cancellable leases	20 years
Aegon Netherlands [member]
Disclosure of investments in financial assets and real estate [Line Items]
Investments in real estate	€ 1,494	€ 1,238

Investments - Summary of Financ

Investments - Summary of Financial Assets Excluding Derivatives (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
AFS	€ 88,170	€ 109,860
Fair value through profit or loss	7,119	5,142
Loans	39,368	39,303
Total	134,658	154,304
Fair value	139,711	159,510
Shares [member]
Disclosure of financial assets [line items]
AFS	490	824
Fair value through profit or loss	1,062	490
Total	1,551	1,314
Fair value	1,551	1,314
Debt securities [member]
Disclosure of financial assets [line items]
AFS	80,200	101,054
Fair value through profit or loss	4,144	2,115
Total	84,344	103,169
Fair value	84,344	103,169
Money market and other short-term instruments [member]
Disclosure of financial assets [line items]
AFS	6,690	6,776
Fair value through profit or loss	119	317
Total	6,809	7,093
Fair value	6,809	7,093
Mortgage loans - held at amortized cost [member]
Disclosure of financial assets [line items]
Loans	33,562	33,696
Total	33,562	33,696
Fair value	38,076	38,499
Private loans - held at amortized cost [member]
Disclosure of financial assets [line items]
Loans	3,642	3,166
Total	3,642	3,166
Fair value	4,181	3,569
Deposits with financial institutions [member]
Disclosure of financial assets [line items]
Loans	139	129
Total	139	129
Fair value	139	129
Policy loans [member]
Disclosure of financial assets [line items]
Loans	1,897	2,207
Total	1,897	2,207
Fair value	1,897	2,207
Other [member]
Disclosure of financial assets [line items]
AFS	791	1,206
Fair value through profit or loss	1,795	2,219
Loans	127	104
Total	2,713	3,529
Fair value	€ 2,713	€ 3,529

Investments - Summary of Moveme

Investments - Summary of Movement on Loan Allowance Account (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Changes In Allowance For Loan Losses [Abstract]
Beginning balance	€ (137)	€ (142)
Addition charged to income statement	(50)	(23)
Reversal to income statement	13	14
Amounts written off	10	17
Net exchange differences	3
Other	(4)	(3)
Ending balance	€ (165)	€ (137)

Investments - Summary of Inv234

Investments - Summary of Investments in Real Estate (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about investment property [abstract]
Beginning balance	€ 1,999	€ 1,990
Additions	239	89
Subsequent expenditure capitalized	10	12
Transfers from other headings	1	34
Disposals	(202)	(215)
Fair value gains / (losses)	193	70
Net exchange differences	(89)	19
Other	(4)	(1)
Ending balance	€ 2,147	€ 1,999

Investments for account of p235

Investments for account of policyholders - Summary of Investments for Account of Policyholders (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of investments for account of policyholders [Line Items]
Total investments for account of policyholders at fair value through profit or loss, excluding derivatives	€ 193,409	€ 202,924
Investments in real estate	655	686
Total investments for account of policyholders	194,063	203,610
Investment in shares [member]
Disclosure of investments for account of policyholders [Line Items]
Total investments for account of policyholders at fair value through profit or loss, excluding derivatives	25,370	25,492
Investment in debt securities [member]
Disclosure of investments for account of policyholders [Line Items]
Total investments for account of policyholders at fair value through profit or loss, excluding derivatives	24,836	30,305
Money market and other short-term investments - carried at fair value [member]
Disclosure of investments for account of policyholders [Line Items]
Total investments for account of policyholders at fair value through profit or loss, excluding derivatives	2,340	1,231
Deposits with financial institutions [member]
Disclosure of investments for account of policyholders [Line Items]
Total investments for account of policyholders at fair value through profit or loss, excluding derivatives	2,946	2,951
Investment in unconsolidated investment funds [member]
Disclosure of investments for account of policyholders [Line Items]
Total investments for account of policyholders at fair value through profit or loss, excluding derivatives	134,132	140,077
Other investments [member]
Disclosure of investments for account of policyholders [Line Items]
Total investments for account of policyholders at fair value through profit or loss, excluding derivatives	€ 3,786	€ 2,868

Investments for account of p236

Investments for account of policyholders - Summary of Investments in Real Estate for Account of Policyholders (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of investments for account of policyholders [Line Items]
Beginning balance	€ 203,610
Ending balance	194,063	€ 203,610
Investments in real estate [member]
Disclosure of investments for account of policyholders [Line Items]
Beginning balance	686	1,022
Additions	7	74
Subsequent expenditure capitalized	3	7
Disposals	(53)	(260)
Fair value gains / (losses)	38	(26)
Net exchange differences	(26)	(131)
Ending balance	€ 655	€ 686

Investments for Account of P237

Investments for Account of Policyholders - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of investments for account of policyholders [Line Items]
Rental income	€ 121	€ 129	€ 133
Investments in real estate [member]
Disclosure of investments for account of policyholders [Line Items]
Rental income	50	60	72
Direct operating expenses	€ 4	€ 5	€ 7

Derivatives - Summary of Deriva

Derivatives - Summary of Derivative Asset and Liability (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	€ 5,912	€ 8,318
Total derivative liabilities	7,130	8,878
Derivatives for general account [member]
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	5,563	7,916
Total derivative liabilities	7,053	8,771
Derivatives for general account [member] | Derivatives with negative values not designated as hedges [member]
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	5,081	6,533
Total derivative liabilities	6,716	8,280
Derivatives for general account [member] | Non-cash changes [member]
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	32	45
Total derivative liabilities	48	119
Derivatives for general account [member] | Cash flow hedges [member]
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	393	1,234
Total derivative liabilities	233	250
Derivatives for general account [member] | Derivatives designated as Net foreign investment hedges [member]
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	57	104
Total derivative liabilities	57	123
Derivatives for account of policyholders [member]
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	349	402
Total derivative liabilities	76	107
Derivatives for account of policyholders [member] | Derivatives with negative values not designated as hedges [member]
Disclosure of derivative financial instruments [Line Items]
Total derivative assets	349	402
Total derivative liabilities	€ 76	€ 107

Derivatives - Additional Inform

Derivatives - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of derivative financial instruments [Line Items]
Decrease in derivative assets	€ 259
Current derivative assets	495	€ 1,030
Current derivative liabilities	949	2,537
Derivatives designated as cash flow hedges	€ 2	12	€ 8
Description of periods when cash flows affect profit or loss	Aegon hedges its exposure to the variability of future cash flows from the interest rate movements for terms up to 28 years for hedges converting existing floating-rate assets and liabilities to fixed- rate assets.
Deferred gain recognized directly to equity	€ 598	407
Description of periods when cash flows affect profit or loss	The cash flows from these hedging instruments are expected to affect the profit and loss for approximately the next 35 years.
Cash flow hedge discontinued due to divestment	€ 248
Reclassification of loss from equity to investment income	(13)	(37)	(13)
Expected deferred gains or losses to be reclassified from equity into net income during the next 12 months	63
Non-cash changes [member]
Disclosure of derivative financial instruments [Line Items]
Derivatives designated as cash flow hedges	(6)	26	(17)
Reclassification of loss from equity to investment income	3	7	5
Cash flow hedges [member]
Disclosure of derivative financial instruments [Line Items]
Gain on hedge ineffectiveness	€ 0	5	4
Reclassification of loss from equity to investment income		€ 5	€ 4
Interest rate movements [member]
Disclosure of derivative financial instruments [Line Items]
Description of periods when cash flows affect profit or loss	Aegon hedges its exposure to the variability of future cash flows from interest rate movements for terms up to 26 years.
Currency swap contract [member]
Disclosure of derivative financial instruments [Line Items]
Description of periods when cash flows affect profit or loss	Aegon also makes use of cross currency swaps to convert variable or fixed foreign currency cash flows into fixed cash flows in local currencies. The cash flows from these hedging instruments are expected to occur over the next 19 years

Derivatives - Derivatives Not D

Derivatives - Derivatives Not Designated In Hedge - General Account (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of derivative financial instruments [Line Items]
Derivative assets, general account	€ 5,912	€ 8,318
Derivative liability, general account	7,130	8,878
Derivatives for general account [member]
Disclosure of derivative financial instruments [Line Items]
Derivative assets, general account	5,563	7,916
Derivative liability, general account	7,053	8,771
Derivatives with negative values not designated as hedges [member] | Derivatives for general account [member]
Disclosure of derivative financial instruments [Line Items]
Derivative assets, general account	5,081	6,533
Derivative liability, general account	6,716	8,280
Derivatives with negative values not designated as hedges [member] | Derivatives for general account [member] | Derivatives held as an economic hedge [member]
Disclosure of derivative financial instruments [Line Items]
Derivative assets, general account	4,933	6,398
Derivative liability, general account	4,774	6,122
Derivatives with negative values not designated as hedges [member] | Derivatives for general account [member] | Bifurcated embedded derivatives [member]
Disclosure of derivative financial instruments [Line Items]
Derivative assets, general account	13	12
Derivative liability, general account	1,937	2,192
Derivatives with negative values not designated as hedges [member] | Derivatives for general account [member] | Other [member]
Disclosure of derivative financial instruments [Line Items]
Derivative assets, general account	134	124
Derivative liability, general account	€ 5	€ (35)

Derivatives - Credit Default Sw

Derivatives - Credit Default Swaps Positions Outstanding at End of Year (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of information about credit exposures designated as measured at fair value through profit or loss [Line Items]
Notional	€ 3,606	€ 4,466
Fair value	92	51
CDSs [member]
Disclosure of information about credit exposures designated as measured at fair value through profit or loss [Line Items]
Notional	3,606	4,466
Fair value	€ 92	€ 51

Derivatives - Credit Derivative

Derivatives - Credit Derivative Disclosure By Quality (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of internal credit grades [Line Items]
Notional	€ 3,606	€ 4,466
Fair value	92	51
AAA [member]
Disclosure of internal credit grades [Line Items]
Notional	4	1
AA [member]
Disclosure of internal credit grades [Line Items]
Notional	83	483
Fair value	2	2
A [member]
Disclosure of internal credit grades [Line Items]
Notional	750	763
Fair value	15	7
BBB [member]
Disclosure of internal credit grades [Line Items]
Notional	2,392	2,849
Fair value	68	41
BB [member]
Disclosure of internal credit grades [Line Items]
Notional	357	243
Fair value	8
B or lower [member]
Disclosure of internal credit grades [Line Items]
Notional	€ 21	128
Fair value		€ 3

Derivatives - Summary of Cash F

Derivatives - Summary of Cash Flows are Expected to Occur (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of future net cash flow [Line Items]
Cash inflows	€ 6,352	€ 10,870
Cash outflows	5	5
Net cash flows	6,348	10,864
Not later than 1 year [member]
Disclosure of future net cash flow [Line Items]
Cash inflows	78	319
Net cash flows	78	318
1-5 years [member]
Disclosure of future net cash flow [Line Items]
Cash inflows	315	1,326
Cash outflows	1	1
Net cash flows	314	1,325
Over 5 through 10 years [member]
Disclosure of future net cash flow [Line Items]
Cash inflows	312	888
Cash outflows	4	4
Net cash flows	309	883
Over 10 years [member]
Disclosure of future net cash flow [Line Items]
Cash inflows	5,648	8,338
Net cash flows	€ 5,648	€ 8,338

Investments in Joint Ventures -

Investments in Joint Ventures - Schedule of Investments in Joint Ventures (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of joint ventures [abstract]
Beginning balance	€ 1,614	€ 1,561
Additions	81	92
Share in net income	161	137	€ 142
Share in changes in joint ventures equity (note 32.6)	(15)	9
Dividend	(118)	(196)
Net exchange difference	(17)	(4)
Other	7	15
Ending balance	€ 1,712	€ 1,614	€ 1,561

Investments in Joint Venture245

Investments in Joint Ventures - Summarized Financial Information of Joint Ventures (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summarized statement of financial position
Cash and cash equivalents	€ 10,768	€ 11,347	€ 9,594
Assets	395,923	425,425
Other current liabilities	14,992	16,101
Other non-current liabilities	216	877
Total liabilities	371,821	401,084
Revenue	32,973	33,655	33,902
Results from financial transactions	20,250	15,753	521
Interest income	6,052	6,479	7,087
Profit or loss	2,534	610	(514)
Income tax (expense) or income	65	172	(83)
Net income / (loss)	2,469	438	(431)
Other comprehensive income	(2,038)	(1,301)	(380)
Total comprehensive income / (loss)	431	(863)	€ (811)
Dividends received	(118)	(196)
Amvest [member]
Summarized statement of financial position
Cash and cash equivalents	109	135
Other current assets	166	237
Total current assets	276	372
Non-current assets	3,173	2,519
Assets	3,449	2,891
Other current liabilities	133	149
Current liabilities	133	149
Non-current financial liabilities excluding trade payables and other provisions	643	476
Total non-current financial liabilities	643	476
Total liabilities	776	625
Net assets	2,673	2,266
Revenue	91	86
Results from financial transactions	275	205
Interest expense	(5)	(7)
Profit or loss	357	275
Income tax (expense) or income	(1)	(10)
Net income / (loss)	357	266
Other comprehensive income		7
Total comprehensive income / (loss)	357	273
Dividends received	49	95
Other Joint ventures [member]
Summarized statement of financial position
Cash and cash equivalents	342	373
Other current assets	721	737
Total current assets	1,063	1,110
Non-current assets	6,521	6,375
Assets	7,584	7,485
Current financial liabilities excluding trade payables and other provisions	30	60
Other current liabilities	503	403
Current liabilities	533	464
Non-current financial liabilities excluding trade payables and other provisions	220	292
Other non-current liabilities	5,871	5,721
Total non-current financial liabilities	6,091	6,013
Total liabilities	6,624	6,477
Net assets	960	1,009
Revenue	1,420	1,248
Results from financial transactions	(1)	1
Depreciation and amortization	(20)	(12)
Interest income	186	48
Interest expense	(3)	(3)
Profit or loss	160	122
Income tax (expense) or income	(74)	(47)
Net income / (loss)	86	75
Other comprehensive income	(32)	13
Total comprehensive income / (loss)	54	89
Dividends received	€ 69	€ 101

Investments in Joint Venture246

Investments in Joint Ventures - Summary of Overview of Summarized Financial Information to Carrying Amount of Joint Ventures (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of joint ventures [Line Items]
Carrying amount	€ 1,712	€ 1,614	€ 1,561
Amvest [member]
Disclosure of joint ventures [Line Items]
Net assets of joint venture as presented above	2,673	2,266
Net assets of joint venture excluding goodwill	2,673	2,266
Carrying amount	1,008	877
Amvest [member] | Aegon [member]
Disclosure of joint ventures [Line Items]
Net assets of joint venture excluding goodwill	1,008	877
Other Joint ventures [member]
Disclosure of joint ventures [Line Items]
Net assets of joint venture as presented above	960	1,009
Net assets of joint venture excluding goodwill	587	626
Goodwill on acquisition	373	383
Carrying amount	685	721
Other Joint ventures [member] | Aegon [member]
Disclosure of joint ventures [Line Items]
Net assets of joint venture excluding goodwill	€ 312	€ 338

Investments in Joint Venture247

Investments in Joint Ventures - Additional information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of joint ventures [abstract]
Investments in joint ventures	€ 1,712	€ 1,614	€ 1,561
Carrying value of joint ventures investment net of provision	1,693	1,598
Negative carrying value of joint ventures investment reclassified to Provisions	€ 18	€ 16
Legal stake in joint ventures	50.00%

Investments in Joint Venture248

Investments in Joint Ventures - Summary of Financial Information of Joint Ventures (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of joint ventures [Line Items]
Net income / (loss)	€ 2,469	€ 438	€ (431)
Other comprehensive income	(2,038)	(1,301)	(380)
Total comprehensive income / (loss)	431	(863)	€ (811)
Amvest [member]
Disclosure of joint ventures [Line Items]
Net income / (loss)	357	266
Other comprehensive income		7
Total comprehensive income / (loss)	357	273
Amvest [member] | Aegon legal stake in the joint ventures [member]
Disclosure of joint ventures [Line Items]
Net income / (loss)	126	106
Other comprehensive income		2
Total comprehensive income / (loss)	126	108
Other Joint ventures [member]
Disclosure of joint ventures [Line Items]
Net income / (loss)	86	75
Other comprehensive income	(32)	13
Total comprehensive income / (loss)	54	89
Other Joint ventures [member] | Aegon legal stake in the joint ventures [member]
Disclosure of joint ventures [Line Items]
Net income / (loss)	35	28
Other comprehensive income	(14)	7
Total comprehensive income / (loss)	€ 20	€ 34

Investments in Associates - Sch

Investments in Associates - Schedule of Investment in Associates (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of associates [Line Items]
Beginning balance	€ 270
Share in net income	11	€ 3	€ 5
Net exchange difference	(20)	41	(29)
Ending balance	308	270
Associates [member]
Disclosure of associates [Line Items]
Beginning balance	270	242
Additions	73	20
Disposals	(15)	(4)
Share in net income	11	3
Share in changes in associate's equity	(5)	3
Impairment losses	(1)
Dividend	(11)	(7)
Net exchange difference	(13)	13
Ending balance	€ 308	€ 270	€ 242

Investments in Associates - Add

Investments in Associates - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017EUR (€)
Disclosure of associates [abstract]
Unrecognized share of losses of associates	€ 0

Investments in Associates - 251

Investments in Associates - Schedule of Financial Information of Associates (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of associates [Line Items]
Net income / (loss)	€ 2,469	€ 438	€ (431)
Other comprehensive income	(2,038)	(1,301)	(380)
Total comprehensive income	431	(863)	€ (811)
Carrying amount	308	270
Aegon [member]
Disclosure of associates [Line Items]
Net income / (loss)	9	3
Other comprehensive income	(5)	3
Total comprehensive income	3	7
Carrying amount	€ 308	€ 270

Reinsurance Assets - Summary of

Reinsurance Assets - Summary of Assets Arising From Reinsurance Contracts (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of types of insurance contracts [Line Items]
Investment contracts	€ 19,202	€ 11,208
Life insurance general account [member]
Disclosure of types of insurance contracts [Line Items]
Investment contracts	17,419	9,714	€ 9,677
Life insurance for account of policyholders [member]
Disclosure of types of insurance contracts [Line Items]
Investment contracts	2	2	64
Non-life insurance [member]
Disclosure of types of insurance contracts [Line Items]
Investment contracts	1,327	1,481	€ 1,503
Investment contracts 1 [member]
Disclosure of types of insurance contracts [Line Items]
Investment contracts	€ 453	€ 11

Reinsurance Assets - Additional

Reinsurance Assets - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Amounts Arising From Re Insurance Contracts [Abstract]
Reinsurance assets, current	€ 13	€ 15
Increase in reinsurance assets	€ 8,000

Reinsurance Assets - Summary254

Reinsurance Assets - Summary of Reinsurance Assets Relating to Life Insurance (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of types of insurance contracts [Line Items]
Beginning balance	€ 11,208
Ending balance	19,202	€ 11,208
Life insurance general account [member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	9,714	9,677
Gross premium and deposits - existing and new business	11,326	13,108
Unwind of discount / interest credited	533	783
Insurance liabilities released	(2,877)	(5,965)
Fund charges released	(49)	(11)
Changes to valuation of expected future benefits	823	38
Policy transfers	(38)	(14)
Net exchange differences	(1,698)	183
Transfers to disposal groups	(239)	(8,085)
Transfer to/from insurance contract	23
Other movements	(97)
Ending balance	17,419	9,714
Life insurance for account of policyholders [member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	2	64
Gross premium and deposits - existing and new business	6	897
Unwind of discount / interest credited		23
Insurance liabilities released	(3)	15
Net exchange differences		(6)
Transfers to disposal groups	(3)	(991)
Ending balance	2	2
Insurance [member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	9,716	9,741
Gross premium and deposits - existing and new business	11,332	14,005
Unwind of discount / interest credited	533	806
Insurance liabilities released	(2,880)	(5,950)
Fund charges released	(49)	(11)
Changes to valuation of expected future benefits	823	38
Policy transfers	(38)	(14)
Net exchange differences	(1,697)	177
Transfers to disposal groups	(242)	(9,076)
Transfer to/from insurance contract	23
Other movements	(97)
Ending balance	€ 17,421	€ 9,716

Reinsurance Assets - Summary255

Reinsurance Assets - Summary of Reinsurance Assets Relating to Non-life Insurance (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of types of insurance contracts [Line Items]
Beginning balance	€ 11,208
Ending balance	19,202	€ 11,208
Non-life insurance [member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	1,481	1,503
Gross premium and deposits - existing and new business	99	111
Unwind of discount / interest credited	89	89
Insurance liabilities released	(129)	(148)
Changes to valuation of expected future benefits	28	(57)
Changes in unearned premiums	(42)	(37)
Incurred related to current year	85	66
Incurred related to prior years	37	30
Release for claims settled current year	(19)	(12)
Release for claims settled prior years	(119)	(117)
Change in IBNR	(8)	(2)
Shadow accounting adjustment	6	19
Net exchange differences	(180)	41
Portfolio transfers and acquisitions	2
Other movements	(4)	(5)
Ending balance	€ 1,327	€ 1,481

Assets arising from reinsurance

Assets arising from reinsurance contracts (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of types of insurance contracts [Line Items]
Reinsurance assets	€ 19,202	€ 11,208
Normal course of business [member]
Disclosure of types of insurance contracts [Line Items]
Reinsurance assets	6,648	7,609
Exit of a business [member]
Disclosure of types of insurance contracts [Line Items]
Reinsurance assets	€ 12,553	€ 3,599

Deferred Expenses - Summary of

Deferred Expenses - Summary of Amounts Arising From Insurance Contracts (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of amounts arising from insurance contracts [Abstract]
DPAC for insurance contracts and investment contracts with discretionary participation features	€ 9,688	€ 10,882
Deferred cost of reinsurance	41	60
Deferred transaction costs for investment management services	406	481
Deferred expenses	10,135	11,423
Current	838	1,080
Non-current	€ 9,297	€ 10,343

Deferred Expenses - Additional

Deferred Expenses - Additional Information (Detail) € in Millions	Dec. 31, 2017EUR (€)
Disclosure Of Deferred Acquisition Costs Arising From Insurance Contracts [Abstract]
Deferred policy acquisition costs	€ 205

Deferred Expenses - Summary 259

Deferred Expenses - Summary of Deferred Costs Arising From Insurance Contracts (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Beginning balance	€ 119,569
Ending balance	110,818	€ 119,569
DPAC [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Beginning balance	10,882	10,457
Costs deferred during the year	938	1,157
Disposal of group assets		(9)
Amortization through income statement	(770)	(837)
Shadow accounting adjustments	(216)	38
Impairments		(31)
Net exchange differences	(1,227)	119
Transfers to disposal groups	(6)
Other	88	(12)
Ending balance	9,688	10,882
Deferred costs of reinsurance [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Beginning balance	60	72
Amortization through income statement	(13)	(14)
Net exchange differences	(7)	1
Ending balance	41	60
Deferred transaction costs [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Beginning balance	481	467
Costs deferred during the year	41	46
Amortization through income statement	(29)	(28)
Impairments	(36)
Net exchange differences	(52)	(3)
Ending balance	€ 406	€ 481

Deferred Expenses - Summary 260

Deferred Expenses - Summary of Breakdown is Provided of DPAC Balances by Line of Business and Reporting Segment (Detail) - Operating segments [member] - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	€ 9,688	€ 10,882
The Netherlands [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	76	84
United Kingdom [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	903	996
Central & Eastern Europe [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	70	71
Spain & Portugal [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	1	1
Americas [member] | Americas [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	8,148	8,898
Asia [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	490	832
Life insurance general account [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	7,025	7,668
Life insurance general account [member] | The Netherlands [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	20	25
Life insurance general account [member] | United Kingdom [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	162	156
Life insurance general account [member] | Central & Eastern Europe [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	70	71
Life insurance general account [member] | Spain & Portugal [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	1	1
Life insurance general account [member] | Americas [member] | Americas [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	6,351	6,674
Life insurance general account [member] | Asia [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	420	740
Individual savings and retirement products [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	1,743	1,911
Individual savings and retirement products [member] | Americas [member] | Americas [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	1,743	1,911
Pensions [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	797	899
Pensions [member] | The Netherlands [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	55	59
Pensions [member] | United Kingdom [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	741	839
Run-off business [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	53	312
Run-off business [member] | Americas [member] | Americas [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	53	312
Non-life insurance [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	71	92
Non-life insurance [member] | Asia [member]
Disclosure of deferred acquisition costs arising from insurance contracts [Line Items]
Deferred acquisition costs arising from insurance contracts	€ 71	€ 92

Other Assets and Receivables -

Other Assets and Receivables - Summary of Other Assets and Receivables (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Assets And Receivables [Abstract]
Real estate held for own use and equipment	€ 530	€ 572
Receivables	8,091	8,530
Accrued income	1,382	1,565
Other assets and receivables	€ 10,002	€ 10,667

Other Assets and Receivables262

Other Assets and Receivables - Summary of Real Estate Held for Own Use and Equipment (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other assets and receivables [Line Items]
Beginning balance	€ 572	€ 575
Ending balance	530	572
Carrying value [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	1,046	986
Additions	71	67
Acquired through business combinations	11
Capitalized subsequent expenditure	1	2
Disposals	(179)	(12)
Unrealized gains/(losses) through equity	8	8
Transfer to investments in real estate		(15)
Transfers to disposal groups	(5)
Net exchange differences	(74)	10
Other	7
Ending balance	885	1,046
Accumulated amortization, depreciation and impairment losses [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	474	411
Depreciation through income statement	71	63
Disposals	(159)	(9)
Impairment losses		7
Impairment losses reversed	(1)
Transfers to disposal groups	(5)
Net exchange differences	(30)	2
Other	6
Ending balance	355	474
General account real estate held for own use [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	332	338
Ending balance	307	332
General account real estate held for own use [member] | Carrying value [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	453	442
Additions	3	8
Capitalized subsequent expenditure	1	2
Disposals	(34)	(1)
Unrealized gains/(losses) through equity	8	8
Transfer to investments in real estate		(15)
Net exchange differences	(34)	8
Ending balance	396	453
General account real estate held for own use [member] | Accumulated amortization, depreciation and impairment losses [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	121	104
Depreciation through income statement	8	9
Disposals	(28)
Impairment losses		7
Impairment losses reversed	(1)
Net exchange differences	(10)	2
Ending balance	90	121
Equipment 1 [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	241	237
Ending balance	223	241
Equipment 1 [member] | Carrying value [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	593	544
Additions	68	58
Acquired through business combinations	11
Disposals	(144)	(11)
Transfers to disposal groups	(5)
Net exchange differences	(40)	2
Other	7
Ending balance	488	593
Equipment 1 [member] | Accumulated amortization, depreciation and impairment losses [member]
Disclosure of other assets and receivables [Line Items]
Beginning balance	352	307
Depreciation through income statement	63	54
Disposals	(131)	(9)
Transfers to disposal groups	(5)
Net exchange differences	(20)
Other	6
Ending balance	€ 265	€ 352

Other Assets and Receivables263

Other Assets and Receivables - Additional Information (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of other assets and receivables [Line Items]
Carrying value under historical cost model	€ 530,000,000	€ 572,000,000	€ 575,000,000
Percentage of general account real estate held for own use	30.00%	35.00%
Property, plant and equipment, pledged as security	€ 0
Property, plant and equipment, restrictions on title	0
Accrued income	1,364,000,000	€ 1,547,000,000
Historical cost model [member]
Disclosure of other assets and receivables [Line Items]
Carrying value under historical cost model	€ 319,000,000	€ 350,000,000
Independent external appraisers [member]
Disclosure of other assets and receivables [Line Items]
Percentage of appraisals for real estate held for own use	95.00%	97.00%
Equipment 1 [member]
Disclosure of other assets and receivables [Line Items]
Carrying value under historical cost model	€ 223,000,000	€ 241,000,000	€ 237,000,000
Held for lease	€ 0	€ 0
Bottom of range [member] | Buildings [member]
Disclosure of other assets and receivables [Line Items]
Useful lives and depreciated period	P40Y
Bottom of range [member] | Equipment 1 [member]
Disclosure of other assets and receivables [Line Items]
Property, plant and equipment, pledged as security	€ 0
Property, plant and equipment, restrictions on title	€ 0
Useful lives and depreciated period	P3Y
Top of range [member] | Buildings [member]
Disclosure of other assets and receivables [Line Items]
Useful lives and depreciated period	P50Y
Top of range [member] | Equipment 1 [member]
Disclosure of other assets and receivables [Line Items]
Property, plant and equipment, pledged as security	€ 0
Property, plant and equipment, restrictions on title	€ 0
Useful lives and depreciated period	P5Y

Other Assets and Receivables264

Other Assets and Receivables - Summary of Receivables (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Assets And Receivables [Abstract]
Loans to associates	€ 12	€ 2
Loans to joint ventures	13	7
Receivables from policyholders	999	1,187
Receivables from brokers and agents	400	459
Receivables from reinsurers	2,708	1,979
Cash outstanding from assets sold	46	67
Trade receivables	910	1,434
Cash collateral	1,545	1,457
Reverse repurchase agreements	230	77
Income tax receivable	85	477
Other	1,190	1,463
Provision for doubtful debts	(48)	(79)
Receivables	8,091	8,530
Current	8,061	8,487
Non-current	€ 30	€ 44

Other Assets and Receivables265

Other Assets and Receivables - Summary of Receivables (Parenthetical) (Detail) € in Millions	12 Months Ended
	Dec. 31, 2016EUR (€)
Disclosure Of Other Assets And Receivables [Abstract]
Certain amounts reclassified to conform to current year presentation	€ 8,530

Other Assets and Receivables266

Other Assets and Receivables - Summary of Movements in Provision for Doubtful Debts (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Assets And Receivables [Abstract]
Beginning balance	€ (79)	€ (107)
Additions charged to earnings	(6)	(5)
Unused amounts reversed through the income statement	4	7
Used during the year	31	26
Net exchange differences	2
Ending balance	€ (48)	€ (79)

Other Assets and Receivables267

Other Assets and Receivables - Summary of Accrued Income (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Assets And Receivables [Abstract]
Accrued interest	€ 1,357	€ 1,543
Other	25	22
Accrued income	€ 1,382	€ 1,565

Intangible Assets - Summary of

Intangible Assets - Summary of Intangible Assets (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	€ 1,820	€ 1,901
Ending balance	1,633	1,820
Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	8,876	8,769
Additions	37	21
Acquisitions through business combinations	140	4
Capitalized subsequent expenditure	3	3
Disposals	(328)	(3)
Net exchange differences	(919)	83
Transfers to disposal groups	(2)
Ending balance	7,808	8,876
Accumulated amortization, depreciation and impairment losses [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	7,056	6,868
Amortization through income statement	104	211
Shadow accounting adjustments	26	(89)
Disposals	(288)	(3)
Impairment losses	8
Net exchange differences	(728)	69
Transfers to disposal groups	(2)
Ending balance	6,176	7,056
Goodwill [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	294	299
Ending balance	293	294
Goodwill [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	503	507
Acquisitions through business combinations	56	(8)
Disposals	(55)
Net exchange differences	(42)	4
Ending balance	462	503
Goodwill [member] | Accumulated amortization, depreciation and impairment losses [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	209	208
Disposals	(28)
Net exchange differences	(11)
Ending balance	169	209
VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	1,399	1,472
Ending balance	1,153	1,399
VOBA [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	7,576	7,462
Additions	6	2
Disposals	(175)
Net exchange differences	(841)	112
Ending balance	6,565	7,576
VOBA [member] | Accumulated amortization, depreciation and impairment losses [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	6,177	5,990
Amortization through income statement	63	178
Shadow accounting adjustments	26	(89)
Disposals	(165)
Net exchange differences	(689)	98
Ending balance	5,412	6,177
Future servicing rights [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	64	57
Ending balance	99	64
Future servicing rights [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	327	314
Acquisitions through business combinations	47	12
Net exchange differences	(15)	1
Ending balance	359	327
Future servicing rights [member] | Accumulated amortization, depreciation and impairment losses [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	263	257
Amortization through income statement	7	6
Net exchange differences	(9)	(1)
Ending balance	260	263
Software [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	50	61
Ending balance	51	50
Software [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	362	381
Additions	29	16
Acquisitions through business combinations	9
Capitalized subsequent expenditure	3	3
Disposals	(98)	(3)
Net exchange differences	(9)	(35)
Transfers to disposal groups	(2)
Ending balance	294	362
Software [member] | Accumulated amortization, depreciation and impairment losses [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	311	320
Amortization through income statement	28	25
Disposals	(95)	(3)
Impairment losses	8
Net exchange differences	(8)	(30)
Transfers to disposal groups	(2)
Ending balance	243	311
Other [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	12	12
Ending balance	36	12
Other [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	109	105
Additions	2	3
Acquisitions through business combinations	29
Net exchange differences	(11)	1
Ending balance	128	109
Other [member] | Accumulated amortization, depreciation and impairment losses [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	97	93
Amortization through income statement	6	2
Net exchange differences	(11)	2
Ending balance	€ 92	€ 97

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) £ in Millions	Jan. 01, 2017EUR (€)	Jan. 01, 2017GBP (£)	Aug. 31, 2017EUR (€)	Jan. 31, 2017EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Disclosure of detailed information about intangible assets [Line Items]
Intangible assets pledged as security for liabilities					€ 0
Description on key assumptions used					Other key assumptions used for the calculation were pre-tax risk adjusted discount rate of 8.3%-14.6% (2016: 7.4%-15.9%), new business contribution, renewals, asset fees, investment return, persistency and expenses. Operating assumptions are best estimate assumptions and based on historical data where available. Economic assumptions are based on observable market data and projections of future trends.
Goodwill					€ 293,000,000	€ 294,000,000
Existing business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Description of period for projected cash flows					Value in use has been determined based on a business plan covering a period of typically 3 years, that, in certain instances was further extrapolated to 20 years
New business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Description of period for projected cash flows					The new business levels for years 4-20 assumed a growth rate based on the business plan of the third year
Assumed growth rate extrapolated based on business plan					20.00%	20.00%
Cofunds Ltd [member]
Disclosure of detailed information about intangible assets [Line Items]
Acquisitions through business combinations	€ 56,000,000	£ 48
Nordea Second-Pillar Pension Fund [member]
Disclosure of detailed information about intangible assets [Line Items]
Acquisitions through business combinations			€ 36,000,000
Top of range [member]
Disclosure of detailed information about intangible assets [Line Items]
Pre-tax adjusted discount rate						15.90%
Top of range [member] | Existing business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Period for cash flows projection					20 years
Top of range [member] | New business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Assumed growth rate extrapolated based on business plan					14.60%
Bottom of range [member]
Disclosure of detailed information about intangible assets [Line Items]
Pre-tax adjusted discount rate						7.40%
Bottom of range [member] | Existing business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Period for cash flows projection					3 years
Bottom of range [member] | New business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Assumed growth rate extrapolated based on business plan					8.30%
United States [member] | Annuities cash generating units [member]
Disclosure of detailed information about intangible assets [Line Items]
Recoverable amount of assets - cash generating unit					€ 121,000,000	€ 131,000,000
Pre-tax adjusted discount rate					17.00%
United States [member] | Retirement plans cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Recoverable amount of assets - cash generating unit					€ 52,000,000	€ 57,000,000
Pre-tax adjusted discount rate					18.00%
United States [member] | Existing business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Description of period for projected cash flows					Assume business plans covering a period of three years further extrapolated to ten years
United States [member] | New business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Description of period for projected cash flows					New business levels for years 4-10
Assumed growth rate extrapolated based on business plan					0.00%	0.00%
United States [member] | Top of range [member] | Existing business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Period for cash flows projection						10 years
United States [member] | Top of range [member] | New business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Period for cash flows projection						10 years
United States [member] | Bottom of range [member] | Existing business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Period for cash flows projection					3 years
United States [member] | Bottom of range [member] | New business cash generating unit [member]
Disclosure of detailed information about intangible assets [Line Items]
Period for cash flows projection					4 years
VOBA [member]
Disclosure of detailed information about intangible assets [Line Items]
Average amortization period					24
Remaining average amortization period					P7Y	P8Y
VOBA [member] | Divestments in Americas and the Netherlands [member]
Disclosure of detailed information about intangible assets [Line Items]
Disposals					€ 11,000,000
Future servicing rights [member]
Disclosure of detailed information about intangible assets [Line Items]
Remaining average amortization period					P14Y	P9Y
Future servicing rights [member] | Top of range [member]
Disclosure of detailed information about intangible assets [Line Items]
Average amortization period					P30Y
Software [member]
Disclosure of detailed information about intangible assets [Line Items]
Average amortization period					P5Y
Remaining average amortization period					P4Y	P3Y
Software [member] | Divestments in Americas and the Netherlands [member]
Disclosure of detailed information about intangible assets [Line Items]
Disposals					€ 3,000,000
Goodwill [member] | Cofunds Ltd [member]
Disclosure of detailed information about intangible assets [Line Items]
Acquisitions through business combinations				€ 56,000,000
Goodwill [member] | Cofunds Ltd [member] | Aegon United Kingdom [member]
Disclosure of detailed information about intangible assets [Line Items]
Description of period for projected cash flows					3 years
Pre-tax adjusted discount rate					11.80%
Assumed growth rate extrapolated based on business plan					3.00%
Goodwill					€ 263,000,000
Post-tax adjusted discount rate					10.80%
Goodwill [member] | Divestments in Americas and the Netherlands [member]
Disclosure of detailed information about intangible assets [Line Items]
Disposals					€ 27,000,000
Customer-related intangible assets [member] | Cofunds Ltd [member]
Disclosure of detailed information about intangible assets [Line Items]
Acquisitions through business combinations				€ 29,000,000

Intangible Assets - Summary 270

Intangible Assets - Summary of Geographically Cash-generating Units to Goodwill (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about intangible assets [Line Items]
Goodwill	€ 293	€ 294
Americas [member]
Disclosure of detailed information about intangible assets [Line Items]
Goodwill	174	198
Central & Eastern Europe [member]
Disclosure of detailed information about intangible assets [Line Items]
Goodwill	34	36
Asia [member]
Disclosure of detailed information about intangible assets [Line Items]
Goodwill	31	36
United Kingdom [member]
Disclosure of detailed information about intangible assets [Line Items]
Goodwill	€ 54
The Netherlands [member]
Disclosure of detailed information about intangible assets [Line Items]
Goodwill		€ 25

Intangible Assets - Summary 271

Intangible Assets - Summary of Movement in VOBA (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	€ 1,820	€ 1,901
Ending balance	1,633	1,820
VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Beginning balance	1,399	1,472
Additions	6	2
Disposals	(11)
Amortization / depreciation through income statement	(63)	(178)
Shadow accounting adjustments	(26)	89
Net exchange differences	(153)	14
Ending balance	€ 1,153	€ 1,399

Intangible Assets - Summary 272

Intangible Assets - Summary of Geographically Lines of Business to Voba (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	€ 1,633	€ 1,820	€ 1,901
VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	1,153	1,399	€ 1,472
Life insurance [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	884	1,038
Individual savings and retirement products [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	144	181
Pensions [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	122	149
Distribution [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill		8
Americas [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	1,038	1,242
Americas [member] | Life insurance [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	883	1,028
Americas [member] | Individual savings and retirement products [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	144	181
Americas [member] | Pensions [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	7	10
The Netherlands [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	17	30
The Netherlands [member] | Pensions [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	17	22
The Netherlands [member] | Distribution [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill		8
United Kingdom [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	98	118
United Kingdom [member] | Pensions [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	98	118
Asia [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	1	10
Asia [member] | Life insurance [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	1	10
Run-off business [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	4	23
Run-off business [member] | Americas [member] | VOBA [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Intangible assets and goodwill	€ 4	€ 23

Shareholders' Equity - Summary

Shareholders' Equity - Summary of Issued Share Capital and Reserves Attributable to Shareholders (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Share capital - par value	€ (322)	€ (319)
Share premium	7,731	7,873	€ 8,059	€ 8,270
Total share capital	322	319	328
Treasury shares	(325)	(190)	(269)
Revaluation reserves	4,920	5,381
Remeasurement of defined benefit plans	(1,669)	(1,820)
Other reserves	(390)	1,347	1,283	(86)
Group equity	24,102	24,341	26,250	€ 27,683
Shareholders of Aegon NV [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Share capital - par value	322	319	328
Share premium	7,731	7,873	8,059
Total share capital	8,053	8,193	8,387
Retained earnings	9,699	7,609	8,100
Treasury shares	(325)	(190)	(269)
Total retained earnings	9,374	7,419	7,832
Revaluation reserves	4,920	5,381	6,471
Remeasurement of defined benefit plans	(1,669)	(1,820)	(1,532)
Other reserves	(390)	1,347	1,283
Group equity	€ 20,288	€ 20,520	€ 22,441

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - EUR (€) € / shares in Units, € in Millions	Dec. 19, 2017	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Jun. 30, 2017	May 31, 2017	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Number of common shares				80,996,000	66,105,000	44,532,000
Share buyback program, number of common shares repurchased				13,042,592
Revaluation				€ 4,920	€ 5,381
Vereniging Aegon [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Percentage of shareholding stake in acquired company	32.60%
Revaluation account [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Revaluation				5,380	6,113
Revaluation deficit [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Revaluation				€ 363	€ 663
Aegon [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Share buyback program, number of common shares repurchased					83,116,535
Share buyback program, value of common shares repurchased					€ 400
Share buyback program, number of repurchased common shares were cancelled		83,116,535
Aegon [member] | Interim dividend [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Number treasury shares										19,047,358
Aegon [member] | Final dividend and interim dividend [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Share buyback program, number of common shares repurchased				51,864,626	60,023,886	36,416,606
Vereniging Aegon [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Share buyback program, value of common shares repurchased					€ 400
Percentage of shareholding stake in acquired company				32.60%
Aegon N. V. and subsidiaries [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance, par value				€ 0.12	€ 0.12
Number treasury shares				64,488,000	47,473,000	42,998,000						49,537,000
Common shares [member] | Aegon [member] | Interim dividend [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance		1,506,562					21,099,402			1,089,315
Common shares issuance, par value		€ 0.12					€ 0.12			€ 0.12
Number of common shares		30,765,224					24,948,255			20,136,673
Common shares [member] | Aegon [member] | Final dividend [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance, par value			€ 0.12
Number of common shares			29,258,662								16,279,933
Number treasury shares			9,121,989
Common shares [member] | Aegon N. V. and subsidiaries [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Number of common shares				65,650,650	48,780,045
Common shares B [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Number of common shares				15,346,000	17,325,000
Number treasury shares				15,346,000	17,325,000
Common shares B [member] | Aegon [member] | Vereniging Aegon [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance						3,696,440
Common shares issuance, par value						€ 0.12
Share buyback program, number of common shares repurchased	13,042,592		17,324,960
Common shares B [member] | Aegon N V [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Number of common shares				15,345,680	17,324,960
Common shares [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance, par value				€ 0.12
Number of common shares				2,095,648,000	2,074,549,000	2,147,037,000
Common shares [member] | Aegon N V [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Number of common shares				64,488,000	47,473,000	42,998,000
Common share B [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance, par value				€ 0.12
Number of common shares				585,022,000	585,022,000	585,022,000
Common share B [member] | Aegon N. V. and subsidiaries [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance, par value				€ 0.12	€ 0.12
Number of common shares				15,345,680	17,324,960
Ordinary share [member] | Aegon N. V. and subsidiaries [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance, par value				€ 0.12	€ 0.12
Number of common shares				65,650,650	48,780,045
Common Share B [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance									1,979,260
Common shares issuance, par value				€ 0.12	€ 0.12				€ 0.12
Number treasury shares				15,346,000	17,325,000
Common Share [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance								26,916,371
Common shares issuance, par value				€ 0.12	€ 0.12
Common Share [member] | Vereniging Aegon [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Common shares issuance								13,042,612
Common shares issuance, par value								€ 0.12
Common Share [member] | Aegon N. V. and subsidiaries [member]
Summary of issued share capital and reserves attributable to shareholders [Line Items]
Number treasury shares				64,488,000	47,473,000	42,998,000

Shareholders' Equity - Summa275

Shareholders' Equity - Summary of Share Capital - Par Value (Detail) - EUR (€) € / shares in Units, € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of classes of share capital [Line Items]
Issued capital	€ 322	€ 319	€ 328
Beginning balance	(319)
Ending balance	€ (322)	€ (319)
Weighted average shares	2,042,000,000	2,048,000,000	2,101,000,000
Common shares [member]
Disclosure of classes of share capital [Line Items]
Issued capital	€ 251	€ 249	€ 258
Authorized share capital	€ 720	€ 720	€ 720
Number of authorized shares (in million)	6,000	6,000	6,000
Par value in cents per share	€ 12	€ 12	€ 12
Beginning balance	2,074,549	2,147,037	2,145,948
Dividend	21,099	10,629	1,089
Shares withdrawn		(83,117)
Ending balance	2,095,648	2,074,549	2,147,037
Beginning balance	€ 249	€ 258	€ 258
Shares issued			0
Dividend	3	1
Shares withdrawn		(10)
Ending balance	€ 251	€ 249	€ 258
Weighted average shares	2,080,792	2,129,074	2,146,261
Common share B [member]
Disclosure of classes of share capital [Line Items]
Issued capital	€ 70	€ 70	€ 70
Authorized share capital	€ 360	€ 360	€ 360
Number of authorized shares (in million)	3,000	3,000	3,000
Par value in cents per share	€ 12	€ 12	€ 12
Beginning balance	585,022	585,022	581,326
Shares issued			3,696
Ending balance	585,022	585,022	585,022
Beginning balance	€ 70	€ 70	€ 70
Shares issued			0
Ending balance	€ 70	€ 70	€ 70
Weighted average shares	585,022	585,022	583,608

Shareholders' Equity - Summa276

Shareholders' Equity - Summary of Share Premium (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of share premium [Line Items]
Beginning balance	€ 7,873	€ 8,059	€ 8,270
Share dividend	(142)	(186)	(211)
Ending balance	7,731	7,873	8,059
Common shares [member]
Disclosure of share premium [Line Items]
Beginning balance	6,220	6,406
Ending balance	6,078	6,220	6,406
Common share B [member]
Disclosure of share premium [Line Items]
Beginning balance	1,653	1,653
Ending balance	€ 1,653	€ 1,653	€ 1,653

Shareholders' equity - Summa277

Shareholders' equity - Summary of Movements in the Number of Treasury Common Shares (Detail) - EUR (€) shares in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of treasury shares [Line Items]
At January 1	€ 190	€ 269
At December 31	€ 325	€ 190	€ 269
Common shares B [member]
Disclosure of treasury shares [Line Items]
At January 1	17,325
At December 31	15,346	17,325
At January 1	€ 2
At December 31	€ 2	€ 2
Sale transactions price average 0.11 [member] | Common shares B [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(1,979)
Sale transactions average price 0.11 [member] | Common shares B [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(13,043)
Sale: transactions, price average, Amount	€ (1)
Purchase transactions average price 0.13 [member] | Common shares B [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	13,043
Purchase: transactions, average price, Amount	€ 2
Purchase transactions average price 0.11 [member] | Common shares B [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		17,325
Purchase: transactions, average price, Amount		€ 2
Aegon N. V. and subsidiaries [member]
Disclosure of treasury shares [Line Items]
At January 1	47,473	42,998	49,537
At December 31	64,488	47,473	42,998
At January 1	€ 178	€ 257	€ 306
At December 31	€ 314	€ 178	€ 257
Aegon N. V. and subsidiaries [member] | Sale transactions price average 3.44 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(4,085)
Sale: transactions, price average, Amount	€ (14)
Aegon N. V. and subsidiaries [member] | Sale transactions price average 3.68 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(26,916)
Sale: transactions, price average, Amount	€ (99)
Aegon N. V. and subsidiaries [member] | Sale transactions price average 3.77 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(3,849)
Sale: transactions, price average, Amount	€ (14)
Aegon N. V. and subsidiaries [member] | Purchase transactions average price 5.09 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	51,865
Purchase: transactions, average price, Amount	€ 263
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 4.81 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		83,117
Purchase: transactions, average price, Amount		€ 400
Aegon N. V. and subsidiaries [member] | Sale: transactions, price average EUR 6.49 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(6,153)
Sale: transactions, price average, Amount		€ (40)
Aegon N. V. and subsidiaries [member] | Sale: 1 transaction, price EUR 6.38 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(20,137)
Sale: transactions, price average, Amount		€ (129)
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 3.51 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		29,259
Purchase: transactions, average price, Amount		€ 103
Aegon N. V. and subsidiaries [member] | Sale: 1 transaction, price EUR 5.11 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(29,259)
Sale: transactions, price average, Amount		€ (150)
Aegon N. V. and subsidiaries [member] | Shares withdrawn: 1 transaction, price EUR 4.60 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(83,117)
Shares withdrawn: 1 transaction, price EUR 4.60		€ (382)
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 3.84 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		30,765
Purchase: transactions, average price, Amount		€ 118
Aegon N. V. and subsidiaries [member] | Sale: 1 transaction, price EUR 7.24 [Member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares			(7,628)
Sale: transactions, price average, Amount			€ (47)
Aegon N. V. and subsidiaries [member] | Sale: 1 transaction, Price EUR 6.62 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares			(16,280)
Sale: transactions, price average, Amount			€ (93)
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 6.63 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares			16,280
Purchase: transactions, average price, Amount			€ 108
Aegon N. V. and subsidiaries [member] | Sale: 1 transaction, price EUR 5.40 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares			(19,047)
Sale: transactions, price average, Amount			€ (123)
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 5.28 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares			20,137
Purchase: transactions, average price, Amount			€ 106

Shareholders' Equity - Summa278

Shareholders' Equity - Summary of Treasury Shares (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of revaluation reserve [Line Items]
Number of shares	80,996,000	66,105,000	44,532,000
Total amount	€ 325	€ 190	€ 269
Common shares [member]
Disclosure of revaluation reserve [Line Items]
Number of shares	2,095,648,000	2,074,549,000	2,147,037,000
Common shares [member] | Aegon N V [member]
Disclosure of revaluation reserve [Line Items]
Number of shares	64,488,000	47,473,000	42,998,000
Total amount	€ 314	€ 178	€ 257
Common shares [member] | Subsidiaries [member]
Disclosure of revaluation reserve [Line Items]
Number of shares	1,162,000	1,307,000	1,534,000
Total amount	€ 9	€ 10	€ 12
Common shares B [member]
Disclosure of revaluation reserve [Line Items]
Number of shares	15,346,000	17,325,000
Total amount	€ 2	€ 2
Common shares B [member] | Aegon N V [member]
Disclosure of revaluation reserve [Line Items]
Number of shares	15,345,680	17,324,960

Shareholders' equity - Disclosu

Shareholders' equity - Disclosure of Share Capital (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class B treasury shares [member]
Disclosure of treasury shares [Line Items]
Weighted average number of treasury shares B	9,841	9,893
Subsidiaries [member]
Disclosure of treasury shares [Line Items]
Weighted average number of treasury shares B	38,490	81,570	45,097

Shareholders' equity - Summa280

Shareholders' equity - Summary of Revaluation Reserves (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure of revaluation reserve [Line Items]
Disposal of a business	€ 7
Tax effect	76	€ (39)	€ (52)
Other	(390)	1,347	1,283	€ (86)
Reserve of gains and losses on remeasuring available-for-sale financial assets [member]
Disclosure of revaluation reserve [Line Items]
Beginning balance	3,418	4,546	6,741
Gross revaluation	1,310	857	(2,479)
Net (gains) / losses transferred to income statement	(1,330)	(2,122)	(485)
Disposal of a business			(468)
Foreign currency translation differences	(228)	(101)	307
Tax effect	308	240	934
Other			(3)
Other	(28)	(2)
Ending balance	3,450	3,418	4,546
Reserve of cash flow hedges [member]
Disclosure of revaluation reserve [Line Items]
Beginning balance	1,904	1,873	1,525
Gross revaluation	(115)	(131)	278
Net (gains) / losses transferred to income statement	(738)	78	(13)
Foreign currency translation differences	(216)	61	181
Tax effect	567	24	(98)
Other	1
Ending balance	1,402	1,904	1,873
Revaluation account [member]
Disclosure of revaluation reserve [Line Items]
Beginning balance	5,381	6,471	8,308
Gross revaluation	1,203	733	(2,193)
Net (gains) / losses transferred to income statement	(2,069)	(2,044)	(498)
Disposal of a business			(468)
Foreign currency translation differences	(452)	(38)	492
Tax effect	883	262	833
Other			(3)
Other	(27)	(2)
Ending balance	4,920	5,381	6,471
Real estate held for own use [member]
Disclosure of revaluation reserve [Line Items]
Beginning balance	59	52	42
Gross revaluation	8	8	8
Foreign currency translation differences	(8)	2	5
Tax effect	9	(3)	(2)
Ending balance	€ 68	€ 59	€ 52

Shareholders' equity - Summa281

Shareholders' equity - Summary of Revaluation Reserve for Available-for-sale Investments (Detail) - shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of revaluation reserve [Line Items]
Revaluation reserve for available-for-sale investments	3,450	3,418	4,546
Equity securities [member]
Disclosure of revaluation reserve [Line Items]
Revaluation reserve for available-for-sale investments	40	130	139
Debt securities [member]
Disclosure of revaluation reserve [Line Items]
Revaluation reserve for available-for-sale investments	3,423	3,245	4,354
Other securities [member]
Disclosure of revaluation reserve [Line Items]
Revaluation reserve for available-for-sale investments	(14)	43	53

Shareholders' equity - Summa282

Shareholders' equity - Summary of Remeasurement of Defined Benefit Plans (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of revaluation reserve [Line Items]
At January 1	€ (1,820)
Total remeasurement of defined benefit plans	(1,669)	€ (1,820)
Remeasurement of defined benefit Plans of group companies [member]
Disclosure of revaluation reserve [Line Items]
At January 1	(1,820)	(1,532)	€ (1,611)
Remeasurements of defined benefit plans	224	(392)	234
Tax effect	(175)	89	(75)
Net exchange differences	102	16	(86)
Disposal of a business			6
Total remeasurement of defined benefit plans	€ (1,669)	€ (1,820)	€ (1,532)

Shareholders' equity - Summa283

Shareholders' equity - Summary of Other Reserves (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of revaluation reserve [Line Items]
Beginning balance	€ 1,347	€ 1,283	€ (86)
Movement in foreign currency translation and net foreign investment hedging reserves	(1,800)	91	1,505
Disposal of a business	7
Disposal of a business			(76)
Tax effect	76	(39)	(52)
Equity movements of joint ventures	(15)	9	(8)
Equity movements of associates	(5)	3	(1)
Ending balance	(390)	1,347	1,283
Foreign currency translation reserve [member]
Disclosure of revaluation reserve [Line Items]
Beginning balance	1,734	1,731	268
Movement in foreign currency translation and net foreign investment hedging reserves	(1,929)	25	1,687
Disposal of a business	7
Disposal of a business			(127)
Tax effect	108	(22)	(98)
Ending balance	(80)	1,734	1,731
Net foreign investment hedging reserve [member]
Disclosure of revaluation reserve [Line Items]
Beginning balance	(418)	(467)	(382)
Movement in foreign currency translation and net foreign investment hedging reserves	129	65	(181)
Disposal of a business			51
Tax effect	(32)	(17)	45
Ending balance	(321)	(418)	(467)
Equity movements of joint ventures and associates [member]
Disclosure of revaluation reserve [Line Items]
Beginning balance	31	19	27
Equity movements of joint ventures	(15)	9	(8)
Equity movements of associates	(5)	3	(1)
Ending balance	€ 11	€ 31	€ 19

Other Equity Instruments - Summ

Other Equity Instruments - Summary of Other Equity Instruments (Detail) pure in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	3,797	3,800	3,827
Shares granted / Share options cost incurred	26	13	26
Shares vested / Share options forfeited	(30)	(16)	(53)
Ending balance	3,794	3,797	3,800
Junior perpetual capital securities [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	3,008	3,008	3,008
Ending balance	3,008	3,008	3,008
Perpetual cumulative subordinated bonds [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	454	454	454
Ending balance	454	454	454
Share options and incentive plans [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	65	68	94
Shares granted / Share options cost incurred	26	13	26
Shares vested / Share options forfeited	(30)	(16)	(53)
Ending balance	61	65	68
Non-cumulative subordinated notes [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	271	271	271
Ending balance	271	271	271

Other Equity Instruments - S285

Other Equity Instruments - Summary of Coupon Details (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of other equity instruments [Line Items]
Borrowings	€ 13,635	€ 13,153
USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	6.50%	6.50%
Borrowings currency	USD	USD
Coupon date, as of	Quarterly, December 15	Quarterly, December 15
Year of next call	2,018	2,018
USD 250 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings currency	USD	USD
Coupon rate	floating LIBOR rate	floating LIBOR rate
Coupon date, as of	Quarterly, December 15	Quarterly, December 15
Year of next call	2,018	2,018
USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings currency	USD	USD
Coupon rate	floating CMS rate	floating CMS rate
Coupon date, as of	Quarterly, July 15	Quarterly, July 15
Year of next call	2,018	2,018
USD 1 billion [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	6.375%	6.375%
Borrowings currency	USD	USD
Coupon date, as of	Quarterly, June 15	Quarterly, July 15
Year of next call	2,018	2,018
EUR 950 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings currency	EUR	EUR
Coupon rate	floating DSL rate	floating DSL rate
Coupon date, as of	Quarterly, July 15	Quarterly, July 15
Year of next call	2,018	2,018
EUR 200 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	6.00%	6.00%
Borrowings currency	EUR	EUR
Coupon date, as of	Annually, July 21	Annually, July 21
Year of next call	2,018	2,018
USD 525 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	8.00%
Borrowings currency	USD
Coupon date, as of	Quarterly, February 15
Year of next call	2,018
Borrowings	€ 271	€ 271	€ 271
Non-cumulative subordinated notes [member]
Disclosure of other equity instruments [Line Items]
Borrowings	3,008	3,008	3,008
Non-cumulative subordinated notes [member] | USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings	424	424	424
Non-cumulative subordinated notes [member] | USD 250 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings	212	212	212
Non-cumulative subordinated notes [member] | USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings	402	402	402
Non-cumulative subordinated notes [member] | USD 1 billion [member]
Disclosure of other equity instruments [Line Items]
Borrowings	821	821	821
Non-cumulative subordinated notes [member] | EUR 950 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings	950	950	950
Non-cumulative subordinated notes [member] | EUR 200 million [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 200	€ 200	€ 200

Other Equity Instruments - S286

Other Equity Instruments - Summary of Coupon Details (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)
USD 500 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 424,000,000
USD 250 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 250,000,000	€ 250,000,000
Basis point	0.875%	0.875%
Basis point interest rate	4.00%	4.00%
Basis point description	The coupon of the USD 250 million junior perpetual capital securities is reset each quarter based on the then prevailing three-month LIBOR yield plus a spread of 87.5 basis points, with a minimum of 4%.
USD 250 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 212,000,000
USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 500,000,000	€ 500,000,000
Basis point	0.10%	0.10%
Basis point description	The coupon of the USD 500 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year US dollar interest rate swap yield plus a spread of ten basis points, with a maximum of 8.5%.
USD 500 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 402,000,000
USD 500 million [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Basis point interest rate	8.50%	8.50%
USD 1 billion [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 821,000,000,000
EUR 950 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 950,000,000	€ 950,000,000
Basis point	0.10%	0.10%
Basis point description	The coupon of the EUR 950 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year Dutch government bond yield plus a spread of ten basis points, with a maximum of 8%.
EUR 950 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 950,000,000	€ 950,000,000
EUR 950 million [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Basis point interest rate	8.00%	8.00%
EUR 200 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 200,000,000	€ 200,000,000
USD 525 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 525,000,000

Other Equity Instruments - S287

Other Equity Instruments - Summary of Coupon Details - Perpetual Cumulative Subordinated Bonds (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of other equity instruments [Line Items]
Borrowings	€ 13,635	€ 13,153
EUR 136 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	5.185%
Borrowings original currency	EUR
Coupon date	Annual, October 14
EUR 203 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	4.26%
Borrowings original currency	EUR
Coupon date	Annual, March 4
EUR 114 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	1.506%
Borrowings original currency	EUR
Coupon date	Annual, June 8
Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 454	454	€ 454
Perpetual cumulative subordinated bonds [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 454	454
Perpetual cumulative subordinated bonds [member] | EUR 136 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	5.185%
Borrowings original currency	EUR
Coupon date	Annual, October 14
Year of next call	2,018
Borrowings	€ 136	136	136
Perpetual cumulative subordinated bonds [member] | EUR 136 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Year of next call	2,018
Borrowings	€ 136	136
Perpetual cumulative subordinated bonds [member] | EUR 203 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	4.26%
Borrowings original currency	EUR
Coupon date	Annual, March 4
Year of next call	2,021
Borrowings	€ 203	203	203
Perpetual cumulative subordinated bonds [member] | EUR 203 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Year of next call	2,021
Borrowings	€ 203	203
Perpetual cumulative subordinated bonds [member] | EUR 114 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	1.506%
Borrowings original currency	EUR
Coupon date	Annual, June 8
Year of next call	2,025
Borrowings	€ 114	114	€ 114
Perpetual cumulative subordinated bonds [member] | EUR 114 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Year of next call	2,025
Borrowings	€ 114	€ 114

Other Equity Instruments - S288

Other Equity Instruments - Summary of Coupon Details - Perpetual Cumulative Subordinated Bonds (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)
Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Basis point description	If the bonds are not called on the respective call dates and after consecutive period of ten years, the coupons will be reset at the then prevailing effective yield of ten-year Dutch government securities plus a spread of 85 basis points.
Basis point	0.85%	0.85%
EUR 136 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount		€ 136,000,000
Interest rate	7.25%	7.25%
Orginal borrowing maturity	October 14, 2008
EUR 136 million [member] | Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Principal amount		€ 136,000,000
Interest rate	7.25%	7.25%
Orginal borrowing maturity	October 14, 2008
Borrowing maturity	2,018
EUR 136 million [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Interest rate	5.185%	5.185%
Borrowing maturity	October 14, 2008
EUR 136 million [member] | Top of range [member] | Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Interest rate	5.185%	5.185%
Borrowing maturity	October 14, 2018
EUR 203 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 203,000,000	€ 203,000,000
Interest rate	7.125%	7.125%
Orginal borrowing maturity	March 4, 2011
EUR 203 million [member] | Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Borrowing maturity	2,021
EUR 203 million [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Interest rate	4.26%	4.26%
Borrowing maturity	March 4, 2021
EUR 114 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount		€ 114,000,000
Interest rate	8.00%	8.00%
Orginal borrowing maturity	June 8, 2005
EUR 114 million [member] | Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Principal amount		€ 114,000,000
Interest rate	8.00%	8.00%
Orginal borrowing maturity	June 8, 2005
Borrowing maturity	2,025
EUR 114 million [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Interest rate	1.506%	1.506%
Borrowing maturity	2,025
EUR 114 million [member] | Top of range [member] | Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Interest rate	1.506%	1.506%
Borrowing maturity	2,025
EUR 114 million [member] | Bottom of range [member]
Disclosure of other equity instruments [Line Items]
Interest rate	4.156%	4.156%
Borrowing maturity	2,015
EUR 114 million [member] | Bottom of range [member] | Perpetual cumulative subordinated bonds [member]
Disclosure of other equity instruments [Line Items]
Interest rate	4.156%	4.156%
Borrowing maturity	2,015

Other Equity Instruments - Addi

Other Equity Instruments - Additional Information (Detail) $ in Millions	Feb. 07, 2012USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Non-cumulative subordinated notes, due 2042 [member]
Disclosure of other equity instruments [Line Items]
Principal amount | $	$ 525
Non-cumulative subordinated notes [member]
Disclosure of other equity instruments [Line Items]
Interest rate	8.00%
Borrowing maturity	2,042	30 years
Coupon date		August 2,017
Non-cumulative subordinated notes [member] | Fixed interest rate [member]
Disclosure of other equity instruments [Line Items]
Interest rate	8.00%
Non-cumulative subordinated notes [member] | Fixed interest rate [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Interest rate	100.00%
Equity component [member]
Disclosure of other equity instruments [Line Items]
Principal amount		€ 271,000,000	€ 271,000,000
Subordinated borrowings - held at amortized cost [member]
Disclosure of other equity instruments [Line Items]
Principal amount		69,000,000	72,000,000
Deferred tax liability [member]
Disclosure of other equity instruments [Line Items]
Principal amount		€ 92,000,000	€ 106,000,000

Subordinated Borrowings - Summa

Subordinated Borrowings - Summary of Subordinated Borrowings (Detail) - EUR (€) € in Millions	Apr. 25, 2014	Dec. 31, 2017	Dec. 31, 2016
Disclosure of subordinated liabilities [Line Items]
Subordinated borrowings		€ 764	€ 767
Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated borrowings		€ 764	767
USD 525 million non-cumulative subordinated notes [member]
Disclosure of subordinated liabilities [Line Items]
Coupon rate		8.00%
Coupon date		Quarterly, February 15
Year of next call		2,018
Subordinated borrowings		€ 69	72
USD 525 million non-cumulative subordinated notes [member] | Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Coupon rate		8.00%
Coupon date		Quarterly, February 15
Year of next call		2,018
Subordinated borrowings		€ 69	72
EUR 700 million fixed floating subordinated notes [member]
Disclosure of subordinated liabilities [Line Items]
Coupon rate	4.00%	4.00%
Coupon date		Annually, April 25
Year of next call		2,024
Subordinated borrowings		€ 695	695
EUR 700 million fixed floating subordinated notes [member] | Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Coupon rate	4.00%	4.00%
Coupon date		Annually, April 25
Year of next call		2,024
Subordinated borrowings		€ 695	€ 695

Subordinated Borrowings - Su291

Subordinated Borrowings - Summary of Subordinated Borrowings (Parenthetical) (Detail) € in Millions, $ in Millions	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Apr. 25, 2014EUR (€)	Feb. 07, 2012USD ($)
USD 525 million non-cumulative subordinated notes [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued | $	$ 525			$ 525
USD 525 million non-cumulative subordinated notes [member] | Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued | $	$ 525			$ 525
EUR 700 million fixed floating subordinated notes [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued | €		€ 700	€ 700
EUR 700 million fixed floating subordinated notes [member] | Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued | €		€ 700	€ 700

Subordinated Borrowings - Addit

Subordinated Borrowings - Additional Information (Detail) € in Millions, $ in Millions	Apr. 25, 2014EUR (€)	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Feb. 07, 2012USD ($)
Disclosure of subordinated liabilities [Line Items]
Subordinated liabilities			€ 764	€ 767
Subordinated borrowings - held at amortized cost [member]
Disclosure of subordinated liabilities [Line Items]
Fair value of loans			953	844
Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated liabilities			764	767
Aegon N.V [member] | Subordinated borrowings - held at amortized cost [member]
Disclosure of subordinated liabilities [Line Items]
Fair value of loans			953	844
EUR 700 million fixed floating subordinated notes [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued	€ 700		700
Borrowing maturity	Apr. 25, 2044
Subordinated notes, coupon rate	4.00%	4.00%
Subordinated liabilities			695	695
EUR 700 million fixed floating subordinated notes [member] | Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued	€ 700		700
Borrowing maturity	Apr. 25, 2044
Subordinated notes, coupon rate	4.00%	4.00%
Subordinated liabilities			695	695
USD 525 million non-cumulative subordinated notes [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued | $		$ 525			$ 525
Subordinated notes, coupon rate		8.00%
Subordinated liabilities			69	72
USD 525 million non-cumulative subordinated notes [member] | Aegon N.V [member]
Disclosure of subordinated liabilities [Line Items]
Subordinated notes issued | $		$ 525			$ 525
Subordinated notes, coupon rate		8.00%
Subordinated liabilities			€ 69	€ 72

Trust Pass-Through Securities -

Trust Pass-Through Securities - Summary of Trust Pass-through Securities (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of trust pass-through securities [Line Items]
Trust pass-through securities	€ 133	€ 156
USD 225 million [member]
Disclosure of trust pass-through securities [Line Items]
Coupon rate	7.65%
Coupon date	Semi-annually, December 1
Year of issue	1,996
Year of maturity	2,026
Trust pass-through securities	€ 91	109
USD 190 million [member]
Disclosure of trust pass-through securities [Line Items]
Coupon rate	7.625%
Coupon date	Semi-annually, November 15
Year of issue	1,997
Year of maturity	2,037
Trust pass-through securities	€ 41	€ 47

Trust Pass-Through Securitie294

Trust Pass-Through Securities - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of trust pass-through securities [Abstract]
Trust pass-through securities, extension period description	The trust pass-through securities carry provisions with regard to deferral of distributions for extension periods up to a maximum of 10 consecutive semi-annual periods.
Fair value of Trust pass-through securities loans	€ 137	€ 141

Insurance Contracts - Summary o

Insurance Contracts - Summary of Sensitivity Analysis of Net Income and Shareholders' Equity to Changes in Various Underwriting Risks (Detail) - EUR (€)	Dec. 31, 2017	Dec. 31, 2016
On Share Holders Equity Insurance Contracts [member] | Twenty Percentage Increase In Lapse Rates [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of shareholders' equity	€ 69	€ 47
On Share Holders Equity Insurance Contracts [member] | Twenty Percentage Decrease In Lapse Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of shareholders' equity	(124)	(104)
On Share Holders Equity Insurance Contracts [member] | Ten Percentage Increase In Mortality Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of shareholders' equity	514	548
On Share Holders Equity Insurance Contracts [member] | Ten Percentage Decrease In Mortality Rates [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of shareholders' equity	(1,011)	(1,039)
On Share Holders Equity Insurance Contracts [member] | Ten Percentage Increase In Morbidity Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of shareholders' equity	(492)	(521)
On Share Holders Equity Insurance Contracts [member] | Ten Percentage Decrease In Morbidity Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of shareholders' equity	189	184
Insurance [member] | Twenty Percentage Increase In Lapse Rates [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of net income	94	36
Insurance [member] | Twenty Percentage Decrease In Lapse Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of net income	(155)	(91)
Insurance [member] | Ten Percentage Increase In Mortality Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of net income	91	153
Insurance [member] | Ten Percentage Decrease In Mortality Rates [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of net income	(577)	(582)
Insurance [member] | Ten Percentage Increase In Morbidity Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of net income	(463)	(445)
Insurance [member] | Ten Percentage Decrease In Morbidity Rates [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Sensitivity analysis of net income	€ 142	€ 127

Insurance Contracts - Summar296

Insurance Contracts - Summary of Insurance Contracts for General Account (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of insurance contracts for general account [Line Items]
- Unearned premiums and unexpired risks	€ 5,447	€ 5,822
- Outstanding claims	2,206	2,226
- Incurred but not reported claims	830	1,018
Incoming reinsurance	3,913	4,739
- Accident and health insurance	110,818	119,569
Non-life insurance [member]
Disclosure of insurance contracts for general account [Line Items]
- Accident and health insurance	8,484	9,066	€ 8,616
Non-life insurance [member] | accident and health insurance [member]
Disclosure of insurance contracts for general account [Line Items]
- Accident and health insurance	8,225	8,821
Non-life insurance [member] | General insurance [member]
Disclosure of insurance contracts for general account [Line Items]
- Accident and health insurance	259	245
Life insurance general account [member]
Disclosure of insurance contracts for general account [Line Items]
- Accident and health insurance	€ 98,422	€ 105,763	€ 109,884

Insurance Contracts - Summar297

Insurance Contracts - Summary of Movements in Insurance (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of types of insurance contracts [Line Items]
Beginning balance	€ 119,569
Beginning balance	11,208
Ending balance	19,202	€ 11,208
Ending balance	110,818	119,569
Life insurance general account [member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	105,763	109,884
Beginning balance	9,714	9,677
Acquisitions		7
Disposals		99
Unwind of discount / interest credited	533	783
Portfolio transfers and acquisitions	139	97
Gross premium and deposits - existing and new business	6,498	6,356
Unwind of discount / interest credited	4,200	4,050
Changes in valuation of expected future benefits	823	38
Insurance liabilities released	9,247	10,033
Changes in valuation of expected future benefits	(1,145)	820
Loss recognized as a result of liability adequacy testing	843
Shadow accounting adjustments	(92)	(2,053)
Net exchange differences	(8,598)	812
Net exchange differences	(1,698)	183
Transfer (to) / from insurance contracts	23
Transfer (to) / from insurance contracts for account of policyholders	135	1
Ending balance	17,419	9,714
Transfers to disposal groups	(239)	(8,190)
Other	(43)	5
Ending balance	98,422	105,763
Insurance contracts for general account [member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	4,739	4,542
Gross premium and deposits - existing and new business	1,625	1,700
Unwind of discount / interest credited	175	179
Insurance liabilities released	(2,005)	(1,904)
Change in unearned premiums	1	4
Changes in valuation of expected future benefits	(57)	59
Shadow accounting adjustments	(1)
Loss recognized as a result of liability adequacy	(1)	9
Net exchange differences	(558)	138
Other	(4)	13
Ending balance	3,913	4,739
Non-life insurance [member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	9,066	8,616
Beginning balance	1,481	1,503
Disposals		(334)
Unwind of discount / interest credited	89	89
Portfolio transfers and acquisitions	5
Gross premium and deposits - existing and new business	1,893	2,140
Unwind of discount / interest credited	444	426
Changes in valuation of expected future benefits	28	(57)
Insurance liabilities released	(1,065)	(1,186)
Changes in valuation of expected future benefits	173	44
Change in unearned premiums	(1,017)	(1,093)
Change in unexpired risks	3	2
Incurred related to current year	750	684
Incurred related to prior years	231	354
Release for claims settled current year	(287)	(253)
Release for claims settled prior years	(717)	(843)
Shadow accounting adjustments	76	289
Change in IBNR	(79)	(15)
Net exchange differences	(986)	242
Net exchange differences	(180)	41
Ending balance	1,327	1,481
Other	(5)	(5)
Ending balance	8,484	9,066
Insurance Contracts for Account of Policyholders [Member]
Disclosure of types of insurance contracts [Line Items]
Beginning balance	120,929	112,679
Portfolio transfers and acquisitions	(259)	(353)
Gross premium and deposits - existing and new business	12,144	12,931
Unwind of discount / interest credited	13,349	7,085
Insurance liabilities released	(10,882)	(8,206)
Fund charges released	(1,746)	(1,725)
Changes in valuation of expected future benefits	100	268
Net exchange differences	(10,289)	55
Transfer (to) / from insurance contracts	(135)	(1)
Transfer (to) / from insurance contracts for account of policyholders		(808)
Transfers to disposal groups	(1,359)	(1,002)
Other	317	6
Ending balance	€ 122,168	€ 120,929

Investment Contracts - Summary

Investment Contracts - Summary of Investment Contracts for General Account (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of investment contracts general account [Line Items]
Beginning balance	€ 19,572	€ 17,718
Portfolio transfers and acquisitions	55	105
Deposits	8,432	7,200
Withdrawals	(8,455)	(6,059)
Investment contracts liabilities released	(64)	(42)
Interest credited	268	267
Net exchange differences	(1,114)	233
Transfer to/from other headings	21
Other	(1,771)	150
Ending balance	16,943	19,572
Institutional guaranteed products	1,053	3,223
Fixed annuities	5,714	6,809
Savings accounts	9,568	8,814
Investment contracts with discretionary participation features	278	355
Other	331	371
Investment contracts liabilities	16,943	19,572
Beginning balance	84,774	90,119
Gross premium and deposits - existing and new business	6,706	8,277
Withdrawals	(7,654)	(6,393)
Interest credited	9,147	9,929
Investment contracts liabilities released	(9,006)	(10,841)
Fund charges released	(176)	(209)
Net exchange differences	(5,842)	(6,767)
Transfers to disposal groups	(3,498)
Transfer (to) / from insurance contracts for account of policyholders		808
Other	(16)	(149)
Ending balance	74,434	84,774
Without Discretionary Participation Features [member]
Disclosure of investment contracts general account [Line Items]
Beginning balance	19,217	17,260
Portfolio transfers and acquisitions	55	105
Deposits	8,432	7,200
Withdrawals	(8,455)	(6,059)
Interest credited	268	267
Net exchange differences	(1,102)	294
Transfer to/from other headings	21
Other	(1,771)	150
Ending balance	16,665	19,217
Beginning balance	42,803	40,365
Gross premium and deposits - existing and new business	5,393	6,553
Withdrawals	(7,654)	(6,393)
Interest credited	4,589	2,649
Fund charges released	(176)	(209)
Net exchange differences	(4,272)	(12)
Transfers to disposal groups	(3,498)
Other	(16)	(149)
Ending balance	37,169	42,803
With Discretionary Participation Features [member]
Disclosure of investment contracts general account [Line Items]
Beginning balance	355	457
Investment contracts liabilities released	(64)	(42)
Net exchange differences	(13)	(61)
Ending balance	278	355
Beginning balance	41,971	49,754
Gross premium and deposits - existing and new business	1,313	1,724
Interest credited	4,558	7,280
Investment contracts liabilities released	(9,006)	(10,841)
Net exchange differences	(1,570)	(6,754)
Transfer (to) / from insurance contracts for account of policyholders		808
Ending balance	€ 37,265	€ 41,971

Guarantees in Insurance Cont299

Guarantees in Insurance Contracts - Additional Information (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 1999
Disclosure of insurance contracts contractual obligations [Line Items]
Period of which return of premium guarantee payable	14 years
Re insured account value	€ 3,431,000	€ 3,176,000	€ 2,979,000
Guaranteed remaining balance	1,200,000	1,500,000
Fixed annuity product balance	270,000	328,000
Loss related to increasing own credit spreads	5,000	30,000	€ (5,000)
Increase (decrease) in guarantee reserves	(1,121)	863,000
GMWB [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Derivative contract value	€ 34,000	50,000
Derivative insurance contract description	Aegon entered into a derivative program to mitigate the overall exposure to equity market and interest rate risks associated with the reinsurance contract. This program involves selling equity futures contracts and equity total return swap contracts (S&P 500, Midcap, Russell 2000, and the MCSI EAFE index in accordance with Aegon’s exposure) to mitigate the effect of equity market movement on the reinsurance contract and the purchase of interest rate swaps, treasury futures and treasury forwards to mitigate the effect of movements in interest rates on the reinsurance contracts.
Reinsurance assets [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Re insured account value	€ 2,000,000	€ 2,400,000
First five years [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Long-term forward interest rate assumption	25.00%
Maturity year 2020 [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Volatility assumption of S&P 500 index	23.10%	24.00%
The Netherlands [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Older generation guarantee, percentage	4.00%
Percentage of guarantee decreased				0.00%	3.00%
The Netherlands [member] | Minimum investment return guaranteed [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Guarantees profit sharing maximum, percentage	0.00%
Contract period	5 years
Guarantees fair value contributes net loss before tax earnings	€ (75,000)	€ (61,000)
Guarantee reserve contributed before tax	1,417	(325,000)
Loss related to increasing own credit spreads	(243,000)	404,000
Gain related to increase in equity market	1,147	671,000
Gain related to decreases in equity volatilities	81,000	7,000
Increase in risk free rates	169,000	(1,159)
Other contributed gain (loss)	€ 205,000	€ (279,000)
The Netherlands [member] | Bottom of range [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Percentage of minimum guaranteed return on premium invested	3.00%
Period of premium paid for guaranteed minimum return on investment	10 years
The Netherlands [member] | Bottom of range [member] | Minimum investment return guaranteed [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Adjusted technical interest rates	3.00%
Effective interest rate percentage	0.00%
The Netherlands [member] | Top of range [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Percentage of minimum guaranteed return on premium invested	4.00%
The Netherlands [member] | Top of range [member] | Minimum investment return guaranteed [member]
Disclosure of insurance contracts contractual obligations [Line Items]
Adjusted technical interest rates	4.00%

Guarantees in Insurance Cont300

Guarantees in Insurance Contracts - Summary of Liabilities for Financial Guarantees for Minimum Benefits, Net of Present Value of Expected Future Premiums (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	€ 119,569
Ending balance	110,818	€ 119,569
Account value	122,168	120,929
Net amount at risk	194,063	203,610
The Netherlands [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	34,900
Ending balance	34,379	34,900
Net amount at risk	26,697	27,985
United Kingdom [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	1,747
Ending balance	1,451	1,747
Net amount at risk	62,961	66,786
Financial Guarantee Contracts [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	2,028	1,998
Incurred guarantee benefits	(158)	10
Paid guarantee benefits	(1)	11
Transfers to disposal groups	(30)
Net exchange differences	(44)	10
Ending balance	1,794	2,028
Account value	42,175	45,681
Net amount at risk	1,831	2,262
Financial Guarantee Contracts [member] | United States [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	405	510
Incurred guarantee benefits	(114)	(113)
Paid guarantee benefits	(1)	(1)
Net exchange differences	(42)	10
Ending balance	247	405
Account value	33,371	35,374
Net amount at risk	94	222
Financial Guarantee Contracts [member] | The Netherlands [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	1,555	1,432
Incurred guarantee benefits	(8)	123
Ending balance	1,547	1,555
Account value	8,805	8,957
Net amount at risk	1,737	1,972
Financial Guarantee Contracts [member] | United Kingdom [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	68	56
Incurred guarantee benefits	(37)
Paid guarantee benefits		12
Transfers to disposal groups	(30)
Net exchange differences	€ (2)
Ending balance		68
Account value		1,350
Net amount at risk		€ 68

Guarantees in Insurance Cont301

Guarantees in Insurance Contracts - Summary of Liabilities for Guarantees for Minimum Benefits (Detail)	12 Months Ended
	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	€ 119,569,000,000
Ending balance	110,818,000,000	€ 119,569,000,000
Account value	122,168,000,000	120,929,000,000
Net amount at risk	194,063,000,000	203,610,000,000
United States [member] | Life contingent guarantees [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	1,381	1,359
Incurred guarantee benefits	(171)	130
Paid guarantee benefits	(86)	(148)
Net exchange differences	(153)	40
Ending balance	972	1,381
United States [member] | Life contingent guarantees [member] | Guaranteed Minimum Death Benefit 1 [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	531	544
Incurred guarantee benefits	(49)	48
Paid guarantee benefits	(60)	(75)
Net exchange differences	(58)	15
Ending balance	364	531
Account value	52,070	54,821
Net amount at risk	€ 1,309	€ 2,615
Average attained age of contract holders	69	69
United States [member] | Life contingent guarantees [member] | Guaranteed Minimum Income Benefit [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	€ 849	€ 816
Incurred guarantee benefits	(121)	83
Paid guarantee benefits	(26)	(74)
Net exchange differences	(94)	25
Ending balance	608	849
Account value	5,270	5,628
Net amount at risk	€ 474	€ 684
Average attained age of contract holders	70	69

Guarantees in Insurance Cont302

Guarantees in Insurance Contracts - Summary of Liabilities for Guarantees That are Included in Valuation of Host Contracts, Net of Present Value of Expected Future Premiums (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	€ 119,569
Ending balance	110,818	€ 119,569
Net amount at risk	194,063	203,610
The Netherlands [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	34,900
Ending balance	34,379	34,900
Net amount at risk	26,697	27,985
The Netherlands [member] | Guaranteed Minimum Investment [member]
Liabilities under insurance contracts and reinsurance contracts issued [Line Items]
Beginning balance	5,542	4,741
Incurred guarantee benefits	(823)	801
Ending balance	4,719	5,542
Account value	18,754	19,467
Net amount at risk	€ 4,440	€ 5,017

Borrowings - Summary of Borrowi

Borrowings - Summary of Borrowings (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 13,635	€ 13,153
Current	1,692	1,902
Non-current	11,943	11,251
Fair value of borrowings	14,035	13,545
Capital funding [member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings	2,280	2,386
Operational funding [member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 11,355	€ 10,766

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) € in Millions, $ in Billions	Jul. 18, 2017EUR (€)	Nov. 30, 2017EUR (€)	Jun. 30, 2017EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Aug. 30, 2017USD ($)
Disclosure of detailed information about borrowings [Line Items]
Borrowings at fair value					€ 13,545		€ 14,035
Difference between the contractually required payment at maturity date and the carrying amount					39		9
Operational funding [member]
Disclosure of detailed information about borrowings [Line Items]
Foreign exchange impacts				€ 500
EUR 450 million of ECB LTRO [member]
Disclosure of detailed information about borrowings [Line Items]
Redemption of debt					450
EUR 225 million of ECB MRO [member]
Disclosure of detailed information about borrowings [Line Items]
Redemption of debt					225
EUR 737 million of regular borrowings [member]
Disclosure of detailed information about borrowings [Line Items]
Redemption of debt					737
SAECURE 9 and SAECURE 10 [member]
Disclosure of detailed information about borrowings [Line Items]
Repurchase of mortgage loans					€ 1,658
FHLB advances [member]
Disclosure of detailed information about borrowings [Line Items]
Corporate loans							€ 500
FHLB advances [member] | Covered bonds [member]
Disclosure of detailed information about borrowings [Line Items]
Issued bond | $						$ 3
FHLB advances [member] | Operational funding [member]
Disclosure of detailed information about borrowings [Line Items]
Increase in borrowing capacity		€ 1,300		€ 600
EUR 500 million unsecured notes [member] | Capital funding [member]
Disclosure of detailed information about borrowings [Line Items]
Redemption of coupon rate	3.00%
Repayment of loan with accrued interest	€ 500
Debt instrument face value	€ 500							$ 6
Borrowings issued year				2,012	2,017
Borrowings maturity year				2,017	2,018
Debt instrument issued price percentage	100.157%
Coupon rate	0.00%					3.00%	3.00%
Other [member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings at fair value					€ 610		€ 536
Negative credit spread on income before tax				€ (15)	(1)
Negative credit spread on stockholder equity				(10)	(1)
Cumulative negative credit spread on cumulative income before tax					€ 12		€ 27
Covered bonds [member] | Operational funding [member]
Disclosure of detailed information about borrowings [Line Items]
Increase in borrowing capacity		€ 500	€ 500
Seacure 12 [member] | Operational funding [member]
Disclosure of detailed information about borrowings [Line Items]
Redemption of debt				1,000
Captive Insurance [Member] | Operational funding [member]
Disclosure of detailed information about borrowings [Line Items]
Redemption of debt				€ 400

Borrowings - Summary of Detaile

Borrowings - Summary of Detailed Composition of Capital Funding (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Jul. 18, 2017
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 13,635	€ 13,153
Capital funding [member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 2,280	€ 2,386
Capital funding [member] | EUR 500 million unsecured notes [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	3.00%		0.00%
Coupon date	July 18
Borrowings issued year	2,012	2,017
Borrowings maturity year	2,017	2,018
Borrowings		€ 500
Capital funding [member] | EUR 500 million unsecured notes one [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	0.00%
Coupon date	August 30
Borrowings issued year	2,017
Borrowings maturity year	2,018
Borrowings	€ 500
Capital funding [member] | EUR 75 Million Medium-Term Notes [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	4.625%
Coupon date	December 9
Borrowings issued year	2,004
Borrowings maturity year	2,019
Borrowings	€ 82	84
Capital funding [member] | USD 500 Million Senior Notes [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	5.75%
Coupon date	Semi-annually
Borrowings issued year	2,005
Borrowings maturity year	2,020
Borrowings	€ 455	526
Capital funding [member] | EUR 500 Million Senior Unsecured Notes [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	1.00%
Coupon date	December 8
Borrowings issued year	2,016
Borrowings maturity year	2,023
Borrowings	€ 495	495
Capital funding [member] | GBP 250 Million Medium-Term Notes [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	6.125%
Coupon date	December 15
Borrowings issued year	1,999
Borrowings maturity year	2,031
Borrowings	€ 279	291
Capital funding [member] | GBP 400 Million Senior Unsecured Notes [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	6.625%
Coupon date	Semi-annually
Borrowings issued year	2,009
Borrowings maturity year	2,039
Borrowings	€ 445	462
Capital funding [member] | Other [member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 24	€ 28

Borrowings - Summary of Deta306

Borrowings - Summary of Detailed Composition of Operational Funding (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 13,635	€ 13,153
Operational funding [member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 11,355	10,766
Operational funding [member] | Revolving Loan Facility Warehouse Mortgage Loans [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Monthly
Borrowing maturity	- / 2018-20
Borrowings	€ 729	423
Operational funding [member] | SAECURE 12" RMBS Note [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Quarterly
Borrowing maturity	2012 / 17
Borrowings		1,030
Operational funding [member] | SAECURE 13" RMBS Note [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Quarterly
Borrowing maturity	2013 / 18
Borrowings	€ 750	862
Operational funding [member] | SAECURE 14" RMBS Note [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Quarterly
Borrowing maturity	2014 / 19
Borrowings	€ 994	1,126
Operational funding [member] | SAECURE 15" RMBS Note [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Quarterly
Borrowing maturity	2014 / 20
Borrowings	€ 1,164	1,284
Operational funding [member] | Conditional Pass-Through Covered Bond One [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	0.267%
Coupon date	Annual
Borrowing maturity	2015 / 20
Borrowings	€ 747	747
Operational funding [member] | Conditional Pass-Through Covered Bond Two [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	0.25%
Coupon date	Annual
Borrowing maturity	2016 / 23
Borrowings	€ 496	495
Operational funding [member] | Conditional pass-through covered bond three [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	0.75%
Coupon date	Annual
Borrowing maturity	2017 / 27
Borrowings	€ 486
Operational funding [member] | Conditional pass-through covered bond four [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	0.375%
Coupon date	Annual
Borrowing maturity	2017 / 24
Borrowings	€ 497
Operational funding [member] | Variable Funding Surplus Note [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Quarterly
Borrowing maturity	2006 / 36
Borrowings	€ 1,322	1,505
Operational funding [member] | Floating Rate Guaranteed Note [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Quarterly
Borrowing maturity	2007 / 37
Borrowings		450
Operational funding [member] | FHLB Secured Borrowings [member]
Disclosure of detailed information about borrowings [Line Items]
Coupon rate	Floating
Coupon date	Quarterly
Borrowing maturity	2016 / 46
Borrowings	€ 4,160	2,839
Operational funding [member] | Other [member]
Disclosure of detailed information about borrowings [Line Items]
Borrowings	€ 10	€ 3

Borrowings - Summary of Undrawn

Borrowings - Summary of Undrawn Committed Borrowings Facilities (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about borrowings [Line Items]
Undrawn Borrowing Facilities	€ 3,367	€ 3,885
Floating Interest Rate [member]
Disclosure of detailed information about borrowings [Line Items]
Undrawn Borrowing Facilities	3,367	3,885
Not later than 1 year [member] | Floating Interest Rate [member]
Disclosure of detailed information about borrowings [Line Items]
Undrawn Borrowing Facilities	197	463
> 12 months [member] | Floating Interest Rate [member]
Disclosure of detailed information about borrowings [Line Items]
Undrawn Borrowing Facilities	€ 3,170	€ 3,422

Provisions - Summary of Provisi

Provisions - Summary of Provisions (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other provisions [abstract]
Beginning balance	€ 173	€ 175
Additional provisions	107	92
Disposals	(72)	(33)
Unused amounts reversed through the income statement		(3)
Used during the year	12	(55)
Net exchange differences	(9)	(3)
Ending balance	210	173
Current	151	88
Non-current	€ 60	€ 85

Provisions - Additional Informa

Provisions - Additional Information (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other provisions [Line Items]
Litigation provisions	€ 92	€ 11
Provisions	210	173
Litigation provision [member]
Disclosure of other provisions [Line Items]
Provisions	85
Fees payable upon purchase and surrender of unit-linked policies [member]
Disclosure of other provisions [Line Items]
Provisions	20	24
Restructuring provisions [member]
Disclosure of other provisions [Line Items]
Provisions	27	39
Other provisions [member]
Disclosure of other provisions [Line Items]
Provisions	71	74
Provisions for unearned commission [member]
Disclosure of other provisions [Line Items]
Provisions	€ 0	€ 25

Defined Benefit Plans - Summary

Defined Benefit Plans - Summary of Defined Benefit Plans (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of defined benefit plans [Line Items]
Defined benefit plans	€ 3,950	€ 4,767	€ 4,430
Defined benefit assets	55	51
Defined benefit liabilities	4,005	4,817
Retirement Benefit Plans [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit plans	3,657	4,453	4,135
Other Post Employment Benefit Plans [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit plans	293	314	€ 296
Retirement benefit plans in surplus [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit assets	55	51
Retirement benefit plans in deficit [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit liabilities	3,712	4,503
Other post-employment benefit plans in deficit [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit liabilities	€ 293	€ 314

Defined Benefit Plans - Summ311

Defined Benefit Plans - Summary of Movements of Defined Benefit Plans (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	€ 4,767	€ 4,430
Defined benefit expenses	262	324
Interest expense	109	134	€ 129
Acquisition of subsidiary		3
Current year service cost	158	140	144
Remeasurements of defined benefit plans	(224)	392
Remeasurements of the defined benefit obligations:
Contributions paid	(163)	(250)
Past service cost	(6)	50	13
Benefits paid	(128)	(125)
Net exchange differences	(164)	(8)
Other	(400)
Ending Balance	3,950	4,767	4,430
Commissions and expenses [member] | Present value of defined benefit obligation [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	8,560	8,000
Interest expense	230	267
Acquisition of subsidiary		3
Current year service cost	158	140
Remeasurements of the defined benefit obligations:
- Actuarial gains and losses arising from changes in demographic assumptions	30	(211)
- Actuarial gains and losses arising from changes in financial assumptions	29	894
Past service cost	(6)	50
Contributions by plan participants	12	11
Benefits paid	(523)	(461)
Net exchange differences	(519)	(133)
Other	(400)
Ending Balance	7,572	8,560	8,000
Commissions and expenses [member] | Defined benefit plans [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	3,793	3,569
Interest expense	121	134
Remeasurements of defined benefit plans	283	290
Remeasurements of the defined benefit obligations:
Contributions by employer	175	261
Benefits paid	(396)	(336)
Net exchange differences	(355)	(125)
Ending Balance	3,622	3,793	3,569
Retirement Benefit Plans [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	4,453	4,135
Defined benefit expenses	242	302
Interest expense	99	123	119
Current year service cost	148	127	134
Remeasurements of defined benefit plans	(233)	388
Remeasurements of the defined benefit obligations:
Contributions paid	(163)	(250)
Past service cost	(5)	53	(7)
Benefits paid	(108)	(106)
Net exchange differences	(133)	(15)
Other	(400)
Ending Balance	3,657	4,453	4,135
Other Post Employment Benefit Plans [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning Balance	314	296
Defined benefit expenses	19	22
Interest expense	10	11	10
Acquisition of subsidiary		3
Current year service cost	11	13	10
Remeasurements of defined benefit plans	10	5
Remeasurements of the defined benefit obligations:
Past service cost	(1)	(2)	20
Benefits paid	(19)	(18)
Net exchange differences	(31)	7
Ending Balance	€ 293	€ 314	€ 296

Defined Benefit Plans - Summ312

Defined Benefit Plans - Summary of Amounts Recognized in Statement of Financial Positions (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of net defined benefit liability (asset) [Line Items]
Present value of wholly or partly funded obligations	€ 4,389	€ 4,834
Fair value of plan assets	(3,622)	(3,793)
Surplus Deficit In Plan	767	1,041
Present value of wholly unfunded obligations 1)	3,183	3,726
Ending Balance	3,950	4,767	€ 4,430
Retirement Benefit Plans [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Present value of wholly or partly funded obligations	4,389	4,834
Fair value of plan assets	(3,622)	(3,793)
Surplus Deficit In Plan	767	1,041
Present value of wholly unfunded obligations 1)	2,890	3,412
Ending Balance	3,657	4,453	4,135
Other Post Employment Benefit Plans [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Present value of wholly unfunded obligations 1)	293	314
Ending Balance	€ 293	€ 314	€ 296

Defined Benefit Plans - Summ313

Defined Benefit Plans - Summary of Amounts Recognized in Statement of Financial Positions (Parenthetical) (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of net defined benefit liability (asset) [abstract]
Assets held	€ 2,457	€ 2,796

Defined Benefit Plans - Summ314

Defined Benefit Plans - Summary of Fair Value of Plan Assets (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of net defined benefit liability (asset) [Line Items]
Current year service cost	€ 158	€ 140	€ 144
Net interest on the net defined benefit liability (asset)	109	134	129
Past service cost	(6)	50	13
Total defined benefit expenses	262	324	286
Retirement Benefit Plans [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Current year service cost	148	127	134
Net interest on the net defined benefit liability (asset)	99	123	119
Past service cost	(5)	53	(7)
Total defined benefit expenses	242	302	246
Other Post Employment Benefit Plans [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Current year service cost	11	13	10
Net interest on the net defined benefit liability (asset)	10	11	10
Past service cost	(1)	(2)	20
Total defined benefit expenses	€ 19	€ 22	€ 40

Defined Benefit Plans - Summ315

Defined Benefit Plans - Summary of Breakdown of Plan Assets for Retirement of Benefit Plans (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of fair value of plan assets [Line Items]
Equity instruments	€ 131	€ 219
Debt instrument	809	1,283
Derivatives	254	179
Investment funds	2,032	1,705
Structured securities		3
Other	397	405
At December 31	€ 3,622	€ 3,793
Equity instruments	4.00%	6.00%
Debt instrument	22.00%	34.00%
Derivatives	7.00%	5.00%
Investment funds	56.00%	45.00%
Structured securities	0.00%	0.00%
Other	11.00%	11.00%
At December 31	100.00%	100.00%
Quoted Plan Assets [member]
Disclosure of fair value of plan assets [Line Items]
Equity instruments	€ 127	€ 206
Debt instrument	397	570
Investment funds	5	4
Other	25	12
At December 31	554	792
Unquoted plan assets [member]
Disclosure of fair value of plan assets [Line Items]
Equity instruments	4	14
Debt instrument	411	713
Derivatives	254	179
Investment funds	2,027	1,701
Structured securities		3
Other	372	392
At December 31	€ 3,068	€ 3,001

Defined Benefit Plans - Additio

Defined Benefit Plans - Additional Information (Detail) € in Millions	12 Months Ended
	Dec. 31, 2017EUR (€)yrPlans	Dec. 31, 2016EUR (€)yr	Jan. 01, 2018yr	Dec. 31, 2015EUR (€)
Disclosure of defined benefit plans [Line Items]
Defined benefit plans deficit	€ (629)	€ (742)
Plan benefit liability	3,950	4,767		€ 4,430
Unfunded amount of defined benefit plans	2,032	1,705
Unfunded amount of other post employment defined benefit plans	€ 397	405
Maximum annual benefit accrual percentage	1.875%
Retirement age | yr	67
Defined benefit plan deficit	€ (767)	(1,041)
Aegon United Kingdom [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit plan deficit	(137)	(298)
Plan Amendment Average Life Expectancy [member]
Disclosure of defined benefit plans [Line Items]
Retirement age | yr			68
Effects of disposal of a business [member]
Disclosure of defined benefit plans [Line Items]
Decrease in defined benefit obligation	478
Decrease in insurance contracts for general account	478
Increase in insurance contracts for risk of policy holders	442
Increase in investments for account of policy holders	442
United States [member] | Supplemental pension and retirement plan [member]
Disclosure of defined benefit plans [Line Items]
Defined benefit plans unfunded	257	286
United States [member] | Post employment healthcare benefits [member]
Disclosure of defined benefit plans [Line Items]
Plan benefit liability	€ 227	€ 246
Aegon United Kingdom [member]
Disclosure of defined benefit plans [Line Items]
Remaining average duration of defined benefits obligation | yr	23.1	23
Percentage of investment assets allocation in primary equities	40.00%
Percentage of investment liability allocation in fixed interest and inflation-linked bonds and related derivatives	60.00%
Transamerica Corporation [member]
Disclosure of defined benefit plans [Line Items]
Employer contribution to pension plan	€ 89	€ 226
Aegon United States of America [member]
Disclosure of defined benefit plans [Line Items]
Number of benefit plans | Plans	2
Remaining average duration of defined benefits obligation | yr	13.2	13.3
Aegon Nederland N.V. [member]
Disclosure of defined benefit plans [Line Items]
Remaining average duration of defined benefits obligation | yr	11.9	10.8
Unfunded amount of other post employment defined benefit plans	€ 65	€ 68
Aegon Nederland N.V. [member] | Unfunded [member] | Life insurance general account [member]
Disclosure of defined benefit plans [Line Items]
Remaining average duration of defined benefits obligation | yr	19.6	19.7
Unfunded amount of defined benefit plans	€ 2,628	€ 3,121

Defined Benefit Plans - Summ317

Defined Benefit Plans - Summary of Actuarial Assumptions Used to Determine Defined Benefit Obligations (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Top of range [member]
Financial actuarial assumptions
Club Vita tables Scheme membership CMI	0.0150
Bottom of range [member]
Financial actuarial assumptions
Club Vita tables Scheme membership CMI	0.0125
Aegon Nederland N.V. [member]
Financial actuarial assumptions
Discount rate	2.09%	1.79%
Salary increase rate	Curve 2,017	Curve 2,016
Indexation	44.10% of Curve 2017	45.20% of Curve 2016
Aegon United Kingdom [member]
Demographic actuarial assumptions
Mortality	UK mortality table 1)	UK mortality table 1)
Financial actuarial assumptions
Discount rate	2.56%	2.69%
Price inflation	3.29%	3.37%
United States [member]
Demographic actuarial assumptions
Mortality	US mortality table 1)	US mortality table 2)
Financial actuarial assumptions
Discount rate	3.55%	4.10%
Salary increase rate	3.85%	3.87%
Health care trend rate	7.40%	7.25%

Defined Benefit Plans - Summ318

Defined Benefit Plans - Summary of Estimated Approximate Effects on Defined Benefit Obligation (Detail) - United States [member] - EUR (€)	Dec. 31, 2017	Dec. 31, 2016
Demographic actuarial assumption on mortality rates by 10% Variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	€ (76)	€ (77)
Decrease in actuarial assumptions	83	84
Financial actuarial assumptions of discount rates by 100 basis points variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	(402)	(440)
Decrease in actuarial assumptions	498	546
Finance actuarial assumption on salary increase rate by 100 basis points variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	38	42
Decrease in actuarial assumptions	(33)	(37)
Financial actuarial assumptions of health care trend rates by 100 bps variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	15	16
Decrease in actuarial assumptions	€ (13)	€ (14)

Defined Benefit Plans - Target

Defined Benefit Plans - Target Allocation of Plan Assets for Retirement Benefit Plans for the Next Annual Period (Detail)	Dec. 31, 2017	Dec. 31, 2016
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Equity instruments	4.00%	6.00%
Debt instruments	22.00%	34.00%
Other	11.00%	11.00%
Defined benefit plans [member] | Actuarial assumption of expected rates of pension increases [member] | Aegon United States of America [member] | Bottom of range [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Equity instruments	22.00%
Debt instruments	42.00%
Other	22.00%
Defined benefit plans [member] | Actuarial assumption of expected rates of pension increases [member] | Aegon United States of America [member] | Top of range [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Equity instruments	30.00%
Debt instruments	53.00%
Other	31.00%

Defined Benefit Plans - Summ320

Defined Benefit Plans - Summary of Estimated Approximate Effects on the Defined Benefit Obligation (Detail) - Aegon Nederland N.V. [member] - EUR (€)	Dec. 31, 2017	Dec. 31, 2016
Demographic actuarial assumption on mortality rates by 10% Variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	€ (69)	€ (83)
Decrease in actuarial assumptions	77	94
Financial actuarial assumptions of discount rates by 100 basis points variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	(447)	(545)
Decrease in actuarial assumptions	605	732
Finance actuarial assumption on salary increase rate by 100 basis points variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	4	19
Decrease in actuarial assumptions	(4)	(19)
Finance actuarial assumption on indexation rate by 100 basis points variation [Member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	140	170
Decrease in actuarial assumptions	€ (128)	€ (158)

Defined Benefit Plans - Estimat

Defined Benefit Plans - Estimated Approximate Effects on the Defined Benefit Obligation (Detail) - Aegon United Kingdom [member] - EUR (€)	Dec. 31, 2017	Dec. 31, 2016
Demographic actuarial assumption on mortality rates by 10% Variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	€ (44)	€ (51)
Decrease in actuarial assumptions	50	58
Financial actuarial assumptions of discount rates by 100 basis points variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	(299)	(371)
Decrease in actuarial assumptions	412	513
Finance actuarial assumption on price inflation by 100 basis points variation [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Increase in actuarial assumptions	169	213
Decrease in actuarial assumptions	€ (248)	€ (289)

Defined Benefit Plans - Summ322

Defined Benefit Plans - Summary of Target Allocation of Plan Assets for Retirement Benefit Plans for the Next Annual Period (Detail)	Dec. 31, 2017	Dec. 31, 2016
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Equity instruments	4.00%	6.00%
Debt instruments	22.00%	34.00%
Aegon United Kingdom [member] | Actuarial assumption of expected rates of pension increases [member] | Defined benefit plans [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line Items]
Equity instruments	29.00%
Debt instruments	71.00%

Deferred Gains - Summary of Def

Deferred Gains - Summary of Deferred Gains (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accruals and deferred income [abstract]
At January 1	€ 64	€ 112
Income deferred	1	4
Disposals		(31)
Release to income statement	(5)	(6)
Net exchange differences	(2)	(14)
Transfers to disposal groups	(45)
At December 31	€ 13	€ 64

Deferred tax - Summary of Defer

Deferred tax - Summary of Deferred Tax (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets and liabilities [Line Items]
Deferred tax assets	€ 79	€ 87
Deferred tax liabilities	1,029	2,201
Total net deferred tax liability / (asset)	950	2,113	€ 2,227
Financial assets [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax assets, temporary differences	(20)	(22)
Deferred tax liabilities, temporary differences	1,724	3,143
Total net deferred tax liability / (asset)	1,744	3,165	2,735
Insurance and investment contracts [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax assets, temporary differences	(19)	(55)
Deferred tax liabilities, temporary differences	(1,806)	(3,042)
Total net deferred tax liability / (asset)	(1,787)	(2,988)	(2,500)
Deferred expenses, VOBA and other intangible assets [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax assets, temporary differences	(140)	(148)
Deferred tax liabilities, temporary differences	1,752	3,150
Total net deferred tax liability / (asset)	1,892	3,298	3,008
Defined benefit plans [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax assets, temporary differences	26	54
Deferred tax liabilities, temporary differences	(268)	(592)
Total net deferred tax liability / (asset)	(295)	(645)	(688)
Losses [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax assets, temporary differences	176	221
Deferred tax liabilities, temporary differences	(120)	(188)
Total net deferred tax liability / (asset)	(296)	(409)	(500)
Other [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax assets, temporary differences	57	37
Deferred tax liabilities, temporary differences	(807)	(812)
Total net deferred tax liability / (asset)	(863)	(849)	(261)
Real estate [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax liabilities, temporary differences	554	541
Total net deferred tax liability / (asset)	€ 554	€ 541	€ 434

Deferred tax - Schedule of NetD

Deferred tax - Schedule of NetDeferred Tax Assets and Liabilities has been Recognized (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets and liabilities [Line Items]
Beginning balance	€ 2,113	€ 2,227
Acquisitions / Additions	(6)
Charged to income statement	(201)	185	€ (125)
Charged to equity	(715)	(350)
Net exchange differences	(172)	34
Disposal of a business	2
Transfers to disposal groups	8
Transfer to current income tax	(73)	16
Other	(7)
Ending balance	950	2,113	2,227
Real estate [member]
Deferred tax assets and liabilities [Line Items]
Beginning balance	541	434
Charged to income statement	37	99
Charged to equity	(9)	3
Net exchange differences	(16)	5
Ending balance	554	541	434
Financial assets [member]
Deferred tax assets and liabilities [Line Items]
Beginning balance	3,165	2,735
Charged to income statement	32	596
Charged to equity	(874)	(264)
Net exchange differences	(270)	84
Transfer to current income tax		16
Transfer to/from other headings	(300)
Other	(9)	(1)
Ending balance	1,744	3,165	2,735
Insurance and investment contracts [member]
Deferred tax assets and liabilities [Line Items]
Beginning balance	(2,988)	(2,500)
Charged to income statement	609	(380)
Charged to equity		(2)
Net exchange differences	241	(108)
Transfer to/from other headings	351
Other		2
Ending balance	(1,787)	(2,988)	(2,500)
Deferred expenses, VOBA and other intangible assets [member]
Deferred tax assets and liabilities [Line Items]
Beginning balance	3,298	3,008
Acquisitions / Additions	9
Charged to income statement	(1,016)	222
Charged to equity		2
Net exchange differences	(322)	69
Disposal of a business	2
Transfer to/from other headings	(79)
Other		(3)
Ending balance	1,892	3,298	3,008
Defined benefit plans [member]
Deferred tax assets and liabilities [Line Items]
Beginning balance	(645)	(688)
Charged to income statement	120	135
Charged to equity	174	(85)
Net exchange differences	57	(6)
Other		(1)
Ending balance	(295)	(645)	(688)
Losses [member]
Deferred tax assets and liabilities [Line Items]
Beginning balance	(409)	(500)
Acquisitions / Additions	(1)
Charged to income statement	78	57
Net exchange differences	27	34
Transfers to disposal groups	8
Other		1
Ending balance	(296)	(409)	(500)
Other [member]
Deferred tax assets and liabilities [Line Items]
Beginning balance	(849)	(261)
Acquisitions / Additions	(14)
Charged to income statement	(62)	(543)
Charged to equity	(5)	(2)
Net exchange differences	111	(45)
Transfer to current income tax	(73)
Transfer to/from other headings	27
Other	2	3
Ending balance	€ (863)	€ (849)	€ (261)

Deferred Tax - Additional Infor

Deferred Tax - Additional Information (Detail) - EUR (€) € in Millions	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets and liabilities [Line Items]
United States corporate income tax rate		35.00%
Total impact of tax rate changes		€ 1,034
Tax effect through profit and loss		554
Tax effect through other comprehensive income		479
Increase (decrease) in deferred tax liability		(1,163)
Deferred tax assets recognized for tax losses, gross		79	€ 87
Deferred corporate income tax assets not recognized in respect of deductible temporary differences relating to financial assets, gross		43	70
Deferred corporate income tax assets not recognized in respect of deductible temporary differences relating to financial assets tax amount		8	13
Changes in tax rates or tax laws enacted or announced [member]
Deferred tax assets and liabilities [Line Items]
United States corporate income tax rate	21.00%
Unused tax credits [member]
Deferred tax assets and liabilities [Line Items]
Deferred tax assets recognized for tax losses, gross		85	505
Deferred tax assets recognized for tax losses, tax		15	90
Unremitted earnings [member]
Deferred tax assets and liabilities [Line Items]
Deferred corporate income tax assets not recognized in respect of deductible temporary differences relating to financial assets, gross		1,771	1,770
Deferred corporate income tax assets not recognized in respect of deductible temporary differences relating to financial assets tax amount		€ 441	€ 441

Deferred tax - Schedule of Loss

Deferred tax - Schedule of Loss Carryforward period and Deferred Corporate Income Tax Assets Not Recognized (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets and liabilities [Line Items]
Gross amounts	€ 725	€ 628
Not recognized deferred tax asset	177	170
Less than 5 years [member]
Deferred tax assets and liabilities [Line Items]
Gross amounts	89	101
Not recognized deferred tax asset	22	26
Over 5 through 10 years [member]
Deferred tax assets and liabilities [Line Items]
Gross amounts	137	130
Not recognized deferred tax asset	18	16
Over 10 through 15 years [member]
Deferred tax assets and liabilities [Line Items]
Gross amounts		1
Not recognized deferred tax asset	25	33
Indefinitely [member]
Deferred tax assets and liabilities [Line Items]
Gross amounts	499	396
Not recognized deferred tax asset	€ 111	€ 94

Deferred tax - Schedule ofDefer

Deferred tax - Schedule ofDeferred Corpoarte Income Tax Deducitible Tempory Difference for which Deferred Tax Assets Recognized (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets and liabilities [Line Items]
Deferred tax assets	€ 79	€ 87
Taxable temporary differences [member]
Deferred tax assets and liabilities [Line Items]
Gross amounts	261	1,179
Deferred tax assets	46	350
Deferred corporate income tax asset dependent on retaining bonds and similar investments until the earlier of market recovery or maturity [member] | Taxable temporary differences [member]
Deferred tax assets and liabilities [Line Items]
Gross amounts		816
Deferred tax assets		286
Deferred corporate income tax asset dependent on future taxable profits [member] | Taxable temporary differences [member]
Deferred tax assets and liabilities [Line Items]
Gross amounts	261	362
Deferred tax assets	€ 46	€ 64

Other liabilities - Summary of

Other liabilities - Summary of Other Liabilities (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Liabilities [abstract]
Payables due to policyholders	€ 1,184	€ 1,337
Payables due to brokers and agents	385	428
Payables out of reinsurance	3,010	2,443
Social security and taxes payable	125	125
Investment creditors	1,228	1,437
Cash collateral on derivative transactions	2,335	2,841
Cash collateral on securities lended	3,277	3,633
Cash collateral - other	43	50
Repurchase agreements	1,373	1,489
Commercial paper	72	128
Bank overdrafts	2	1
Other creditors	2,174	3,067
At December 31	15,208	16,978
Current	14,992	16,101
Non-current	216	877
At December 31	€ 15,208	€ 16,978

Other liabilities - Summary 330

Other liabilities - Summary of Other Liabilities (Parenthetical) (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Liabilities [abstract]
Total other liabilities	€ 15,208	€ 16,978

Accruals - Summary of Accruals

Accruals - Summary of Accruals (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Subclassifications of assets, liabilities and equities [abstract]
Accrued interest	€ 183	€ 131
Accrued expenses	147	106
At December 31	€ 329	€ 237

Capital Management and Solve332

Capital Management and Solvency - Additional Information (Detail) € in Millions	12 Months Ended		24 Months Ended
	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2017EUR (€)
Disclosure of capital management and solvency [line items]
Percentage of reduction in own funds due to lowering conversion factor	100.00%
Withdrawal of insurance license triggered by breach of Authorized Control Level (ACL), percentage	100.00%
Withdrawal of insurance license triggered by breach of Company Action Level (CAL), percentage	50.00%
Percentage of higher capital requirement in SCR	100.00%
Insurance entities viewed at Company Action Level (CAL), percentage	100.00%
Capital requirements on a solo-level, Solvency II ratio	100.00%		100.00%
Percentage of tier 1 capital accounted for own funds	89.00%	87.00%
Solvency II revaluations related to items that are not recognized under Solvency	€ 2,019	€ 2,118	€ 2,019
Solvency II revaluation related to the Net Asset Value of subsidiaries that are included under the Deduction & Aggregation method	€ (6,019)	€ (5,828)	€ (6,019)
Total gross financial leverage	28.60%	29.80%	28.60%
Fixed charge coverage	8	7.2	8
Total capitalization	€ 24,383	€ 24,849	€ 24,383
Total distributable reserves	13,749	11,996	13,749
Aegons insurance group [member]
Disclosure of capital management and solvency [line items]
Solvency II revaluation related to items that have a different valuation treatment between IFRS and Solvency II	(1,416)	(1,531)	(1,416)
IFRS and Solvency II frameworks [member]
Disclosure of capital management and solvency [line items]
Solvency II revaluations, total	5,416	5,241
Non-cumulative subordinated notes [member]
Disclosure of capital management and solvency [line items]
Restricted of tier 2 capital	441	503	441
Fixed floating subordinated notes [member]
Disclosure of capital management and solvency [line items]
Restricted of tier 2 capital	772	788	772
Junior perpetual capital securities [member]
Disclosure of capital management and solvency [line items]
Restricted of tier one capital	3,047	3,309	3,047
Perpetual cumulative subordinated bonds [member]
Disclosure of capital management and solvency [line items]
Restricted of tier one capital	€ 493	508	€ 493
New method [member]
Disclosure of capital management and solvency [line items]
Reduction in own funds		€ 2,200
Percentage of tier 2 capital accounted for own funds	8.00%	8.00%
New method [member] | Tier 3 capital [member]
Disclosure of capital management and solvency [line items]
Reduction in own funds		€ 900
New method [member] | Tier 2 capital [member]
Disclosure of capital management and solvency [line items]
Reduction in own funds		700
New method [member] | Unrestricted tier 1 [member]
Disclosure of capital management and solvency [line items]
Reduction in own funds		€ 600
Top of range [member]
Disclosure of capital management and solvency [line items]
Risk-based capital action level conversion percentage	250.00%
Group solvency II ratio	200.00%	170.00%
Capital instruments under solvency period			10 years
Total gross financial leverage	30.00%		30.00%
Fixed charge coverage	8		8
Bottom of range [member]
Disclosure of capital management and solvency [line items]
Risk-based capital action level conversion percentage	150.00%
Group solvency II ratio	150.00%	140.00%
Total gross financial leverage	26.00%		26.00%
Fixed charge coverage	6		6

Capital Management and Solve333

Capital Management and Solvency - Summary of Composition of Available Own Funds Across Tiers (Detail) - Solvency one capital ratio [member] - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
New method [member]
Disclosure of capital management and solvency [line items]
Total available own funds	€ 15,628	€ 15,957
New method [member] | Unrestricted tier 1 [member]
Disclosure of capital management and solvency [line items]
Total available own funds	10,428	10,081
New method [member] | Restricted tier 1 [member]
Disclosure of capital management and solvency [line items]
Total available own funds	3,540	3,817
New method [member] | Tier 2 capital [member]
Disclosure of capital management and solvency [line items]
Total available own funds	1,213	1,291
New method [member] | Tier 3 capital [member]
Disclosure of capital management and solvency [line items]
Total available own funds	€ 448	768
Old method [member]
Disclosure of capital management and solvency [line items]
Total available own funds		18,119
Old method [member] | Unrestricted tier 1 [member]
Disclosure of capital management and solvency [line items]
Total available own funds		10,656
Old method [member] | Restricted tier 1 [member]
Disclosure of capital management and solvency [line items]
Total available own funds		3,817
Old method [member] | Tier 2 capital [member]
Disclosure of capital management and solvency [line items]
Total available own funds		2,008
Old method [member] | Tier 3 capital [member]
Disclosure of capital management and solvency [line items]
Total available own funds		€ 1,638

Capital Management and Solve334

Capital Management and Solvency - Summary of Equity Compares to Solvency II Own Funds (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure of capital management and solvency [line items]
Shareholders' Equity	€ 20,288	€ 20,520
Group Equity	24,102	24,341	€ 26,250	€ 27,683
Previously stated [member]
Disclosure of capital management and solvency [line items]
Shareholders' Equity		20,520
IFRS adjustments for Other Equity instruments and non controlling interests		3,821
Group Equity		24,341
Solvency II revaluations		(5,241)
Excess of Assets over Liabilities		19,100
Availability adjustments		(361)
Fungibility restrictions		(619)
Available own funds		18,119
DNB Bank ASA [Member]
Disclosure of capital management and solvency [line items]
Shareholders' Equity	20,288	20,520
IFRS adjustments for Other Equity instruments and non controlling interests	3,813	3,821
Group Equity	24,102	24,341
Solvency II revaluations	(5,416)	(5,241)
Excess of Assets over Liabilities	18,685	19,100
Availability adjustments	(606)	(361)
Fungibility restrictions	(693)	(619)
Transferability restrictions	(1,758)	(2,162)
Available own funds	€ 15,628	€ 15,957

Capital Management and Solve335

Capital Management and Solvency - Composition of Total Capitalization and Calculation of Gross Financial Leverage Ratio (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of capital management and solvency [line items]
Total shareholders' equity - based on IFRS as adopted by the EU	€ 20,573	€ 20,913
Non-controlling interests, share options and incentive plans not yet exercised	81	88
Revaluation reserves	(4,920)	(5,381)
Remeasurement of defined benefit plans	1,669	1,820
Shareholders' capital	17,401	17,440
Subordinated borrowings	764	767
Trust pass-through securities	133	156
Currency revaluation other equity instruments1)	40	340
Hybrid leverage	4,669	4,996
Senior debt	2,312	2,414
Senior debt for the gross financial leverage	2,312	2,414
Total gross financial leverage	6,982	7,409
Total capitalization	€ 24,383	€ 24,849
Gross financial leverage ratio	28.60%	29.80%
Currency swap contract [member]
Disclosure of capital management and solvency [line items]
Senior debt for the gross financial leverage	€ 31	€ 28
Fixed floating subordinated notes [member]
Disclosure of capital management and solvency [line items]
Subordinated borrowings	695	695
Non-cumulative subordinated notes [member]
Disclosure of capital management and solvency [line items]
Subordinated borrowings	69	72
Junior perpetual capital securities [member]
Disclosure of capital management and solvency [line items]
Junior perpetual capital securities	3,008	3,008
Perpetual cumulative subordinated bonds [member]
Disclosure of capital management and solvency [line items]
Junior perpetual capital securities	454	454
Non-cumulative subordinated notes [member]
Disclosure of capital management and solvency [line items]
Junior perpetual capital securities	€ 271	€ 271

Capital Management and Solve336

Capital Management and Solvency - Schedule of Total Distributable Items (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Distributable items
Equity attributable to shareholders - based on IFRS as adopted by the EU	€ 20,573	€ 20,913
Not distributable items:
Share capital	(322)	(319)
Statutory reserves	(6,502)	(8,598)
At December 31	13,749	11,996
In accordance with IFR5-EU [member]
Distributable items
Equity attributable to shareholders - based on IFRS as adopted by the EU	€ 20,573	€ 20,913

Fair Value - Analysis of Assets

Fair Value - Analysis of Assets and Liabilities Recorded at Fair Value on Recurring Basis by Level of Fair Value Hierarchy (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	€ 395,923	€ 425,425
Liabilities carried at fair value	371,821	401,084
Level III [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	2,064	2,643	€ 2,260
Level III [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	9,130	9,275	11,954
Level III [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	2,318	3,112	5,365
Level III [member] | Debt securities [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,447	1,966	4,144
Level III [member] | Other investments [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	583	754	928
Level III [member] | Real estate held for own use [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	307	332	338
Level III [member] | Investment contracts for account of policyholders [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	219	176	156
Level III [member] | Derivative [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	1,845	2,467	€ 2,104
Investment funds [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	297,718	329,261
Liabilities carried at fair value	44,835	52,290
Investment funds [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	88,170	109,860
Investment funds [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	209,241	219,069
Investment funds [member] | Financial assets revalued amount [Member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	307	332
Investment funds [member] | Shares [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	490	824
Investment funds [member] | Shares [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,062	490
Investment funds [member] | Debt securities [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	80,200	101,054
Investment funds [member] | Debt securities [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	4,144	2,115
Investment funds [member] | Money market and other short-term instruments [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	6,690	6,776
Investment funds [member] | Money market and other short-term instruments [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	119	317
Investment funds [member] | Other investments [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	791	1,206
Investment funds [member] | Other investments [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,795	2,219
Investment funds [member] | Investment contracts for account of policyholders [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	193,409	202,924
Investment funds [member] | Derivatives [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	5,912	8,318
Investment funds [member] | Real estate [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	2,147	1,999
Investment funds [member] | Investments in real estate for policyholders [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	655	686
Investment funds [member] | Real estate held for own use [member] | Financial assets revalued amount [Member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	307	332
Investment funds [member] | Investment contracts for account of policyholders [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	37,169	42,803
Investment funds [member] | Borrowings [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	536	610
Investment funds [member] | Derivative [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	7,130	8,878
Investment funds [member] | Level I [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	145,652	155,860
Liabilities carried at fair value	34	64
Investment funds [member] | Level I [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	28,053	29,504
Investment funds [member] | Level I [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	117,599	126,355
Investment funds [member] | Level I [member] | Shares [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	51	119
Investment funds [member] | Level I [member] | Shares [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	226	288
Investment funds [member] | Level I [member] | Debt securities [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	26,338	29,386
Investment funds [member] | Level I [member] | Debt securities [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,964	27
Investment funds [member] | Level I [member] | Money market and other short-term instruments [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,664
Investment funds [member] | Level I [member] | Money market and other short-term instruments [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	17
Investment funds [member] | Level I [member] | Other investments [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1	1
Investment funds [member] | Level I [member] | Investment contracts for account of policyholders [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	115,323	125,997
Investment funds [member] | Level I [member] | Derivatives [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	68	41
Investment funds [member] | Level I [member] | Derivative [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	34	64
Investment funds [member] | Level II [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	142,937	164,126
Liabilities carried at fair value	42,738	49,584
Investment funds [member] | Level II [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	57,800	77,243
Investment funds [member] | Level II [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	85,137	86,883
Investment funds [member] | Level II [member] | Shares [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	151	312
Investment funds [member] | Level II [member] | Shares [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	232	152
Investment funds [member] | Level II [member] | Debt securities [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	52,415	69,702
Investment funds [member] | Level II [member] | Debt securities [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	2,175	2,082
Investment funds [member] | Level II [member] | Money market and other short-term instruments [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	5,026	6,776
Investment funds [member] | Level II [member] | Money market and other short-term instruments [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	102	317
Investment funds [member] | Level II [member] | Other investments [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	208	453
Investment funds [member] | Level II [member] | Other investments [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	539	961
Investment funds [member] | Level II [member] | Investment contracts for account of policyholders [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	76,302	75,202
Investment funds [member] | Level II [member] | Derivatives [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	5,787	8,169
Investment funds [member] | Level II [member] | Investment contracts for account of policyholders [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	36,950	42,627
Investment funds [member] | Level II [member] | Borrowings [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	536	610
Investment funds [member] | Level II [member] | Derivative [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	5,251	6,347
Investment funds [member] | Level III [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	9,130	9,275
Liabilities carried at fair value	2,064	2,643
Investment funds [member] | Level III [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	2,318	3,112
Investment funds [member] | Level III [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	6,506	5,831
Investment funds [member] | Level III [member] | Financial assets revalued amount [Member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	307	332
Investment funds [member] | Level III [member] | Shares [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	288	393
Investment funds [member] | Level III [member] | Shares [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	604	50
Investment funds [member] | Level III [member] | Debt securities [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,447	1,966
Investment funds [member] | Level III [member] | Debt securities [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	4	6
Investment funds [member] | Level III [member] | Other investments [member] | Available-for-sale financial assets [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	583	754
Investment funds [member] | Level III [member] | Other investments [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,255	1,257
Investment funds [member] | Level III [member] | Investment contracts for account of policyholders [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	1,784	1,726
Investment funds [member] | Level III [member] | Derivatives [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	57	108
Investment funds [member] | Level III [member] | Real estate [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	2,147	1,999
Investment funds [member] | Level III [member] | Investments in real estate for policyholders [member] | Financial assets at fair value through profit or loss [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	655	686
Investment funds [member] | Level III [member] | Real estate held for own use [member] | Financial assets revalued amount [Member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Assets carried at fair value	307	332
Investment funds [member] | Level III [member] | Investment contracts for account of policyholders [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	219	176
Investment funds [member] | Level III [member] | Derivative [member] | Recurring fair value measurement [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Liabilities carried at fair value	€ 1,845	€ 2,467

Fair Value - Schedule of Transf

Fair Value - Schedule of Transfers between Level 1 and Level II for Financial Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	€ 13	€ 5
Total 2016 Transfers Level II to Level I	1,666	69
Recurring fair value measurement [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	149	8
Total 2016 Transfers Level II to Level I	1,714	68
Recurring fair value measurement [member] | Financial liabilities at fair value through profit or loss, category [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	1
Recurring fair value measurement [member] | Investment contracts for account of policyholders [member] | Financial liabilities at fair value through profit or loss, category [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	1
Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Shares [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	1
Total 2016 Transfers Level II to Level I	1
Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Debt securities [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	12	5
Total 2016 Transfers Level II to Level I		69
Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Money markets and other short term instruments [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Total 2016 Transfers Level II to Level I	1,664
Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	136	3
Total 2016 Transfers Level II to Level I	49	(1)
Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Shares [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	124
Total 2016 Transfers Level II to Level I	19
Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investment contracts for account of policyholders [member]
Disclosure of transfers between level 1 and level 2 for financial assets and liabilities recorded at fair value [Line Items]
Transfers Level I to Level II	12	3
Total 2016 Transfers Level II to Level I	€ 30	€ (1)

Fair Value - Disclosures of Cha

Fair Value - Disclosures of Changes in Level 3 Assets (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	€ 401,084
Beginning balance	425,425
Ending balance	371,821	€ 401,084
Ending balance	395,923	425,425
Level III [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	2,643	2,260
Total gains /losses in income statement	(821)	528
Total gains /losses in OCI	0	0
Purchases	60	45
Sales	279	219
Settlements	0	0
Net exchange difference	(87)	(31)
Reclassification	10
Transfers from levels I and II	10
Transfers to levels I and II	(2)	2
Transfers to disposal groups	(30)
Ending balance	2,064	2,643
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	(747)	563
Level III [member] | Investment contracts for account of policyholders [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	176	156
Total gains /losses in income statement	7	(14)
Total gains /losses in OCI	0	0
Purchases	60	45
Sales	(21)	12
Settlements	0	0
Net exchange difference	(12)	(2)
Transfers from levels I and II	10
Transfers to levels I and II	(2)	2
Ending balance	219	176
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	(2)	1
Level III [member] | Derivative [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	2,467	2,104
Total gains /losses in income statement	(828)	542
Total gains /losses in OCI	0	0
Sales	300	207
Settlements	0	0
Net exchange difference	(75)	(28)
Reclassification	10
Transfers to disposal groups	(30)
Ending balance	1,845	2,467
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	(745)	562
Level III [member] | Recurring fair value measurement [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	9,275	11,954
Total gains /losses in income statement	199	(420)
Total gains /losses in OCI	(150)	113
Purchases	2,826	1,821
Sales	(1,558)	(1,527)
Settlements	(935)	(429)
Net exchange difference	(638)	(49)
Reclassification	(16)
Transfers from levels I and II	578	1,077
Transfers to levels I and II	(452)	(3,264)
Transfers to disposal groups	0	0
Ending balance	9,130	9,275
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	131	(159)
Level III [member] | Recurring fair value measurement [member] | Real estate held for own use [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	332	338
Total gains /losses in income statement	(2)	(9)
Total gains /losses in OCI	8	8
Purchases	(3)	5
Sales	(4)
Net exchange difference	(24)	6
Reclassification		(15)
Transfers to disposal groups	0	0
Ending balance	307	332
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	(3)	5
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	3,112	5,365
Total gains /losses in income statement	(19)	(150)
Total gains /losses in OCI	(158)	105
Purchases	939	845
Sales	(309)	(487)
Settlements	(935)	(429)
Net exchange difference	(307)	68
Transfers from levels I and II	205	651
Transfers to levels I and II	(211)	(2,856)
Transfers to disposal groups	0	0
Ending balance	2,318	3,112
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Shares [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	393	293
Total gains /losses in income statement	54	27
Total gains /losses in OCI	(46)	(7)
Purchases	68	161
Sales	(112)	(92)
Settlements	(35)	(1)
Net exchange difference	(34)	11
Transfers to disposal groups	0	0
Ending balance	288	393
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Debt securities [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	1,966	4,144
Total gains /losses in income statement	39	1
Total gains /losses in OCI	(2)	92
Purchases	678	443
Sales	(149)	(262)
Settlements	(890)	(287)
Net exchange difference	(186)	39
Transfers from levels I and II	203	651
Transfers to levels I and II	(211)	(2,854)
Transfers to disposal groups	0	0
Ending balance	1,447	1,966
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Other investments [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	754	928
Total gains /losses in income statement	(112)	(177)
Total gains /losses in OCI	(109)	20
Purchases	194	240
Sales	(48)	(133)
Settlements	(9)	(141)
Net exchange difference	(87)	18
Transfers from levels I and II	1
Transfers to levels I and II		(1)
Transfers to disposal groups	0	0
Ending balance	583	754
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	5,831	6,250
Total gains /losses in income statement	220	(261)
Purchases	1,889	971
Sales	(1,245)	(1,039)
Net exchange difference	(306)	(123)
Reclassification	(16)	15
Transfers from levels I and II	374	427
Transfers to levels I and II	(241)	(409)
Transfers to disposal groups	0	0
Ending balance	6,506	5,831
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	134	(163)
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Shares [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	50
Total gains /losses in income statement	(11)	3
Purchases	583	48
Sales	(18)
Transfers to disposal groups	0	0
Ending balance	604	50
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	(11)	3
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Debt securities [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	6	6
Total gains /losses in income statement		(1)
Net exchange difference	(1)
Transfers to disposal groups	0	0
Ending balance	4	6
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	1
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other investments [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	1,257	1,265
Total gains /losses in income statement	23	(44)
Purchases	378	178
Sales	(350)	(277)
Net exchange difference	(162)	35
Transfers from levels I and II	341	419
Transfers to levels I and II	(233)	(321)
Transfers to disposal groups	0	0
Ending balance	1,255	1,257
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	20	(42)
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investment contracts for account of policyholders [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	1,726	1,745
Total gains /losses in income statement	11	22
Purchases	671	469
Sales	(622)	(395)
Net exchange difference	(27)	(35)
Transfers from levels I and II	32	8
Transfers to levels I and II	(8)	(88)
Transfers to disposal groups	0	0
Ending balance	1,784	1,726
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	30	23
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Derivatives [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	108	222
Total gains /losses in income statement	(33)	(285)
Purchases		75
Sales		108
Net exchange difference	(2)	(12)
Reclassification	(16)
Transfers to disposal groups	0	0
Ending balance	57	108
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	(21)	(287)
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	1,999	1,990
Total gains /losses in income statement	193	70
Purchases	246	120
Sales	(202)	(215)
Net exchange difference	(89)	19
Reclassification		15
Transfers to disposal groups	0	0
Ending balance	2,147	1,999
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	77	118
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate for policyholders [member]
Changes in fair value measurement assets and liabilities [Line Items]
Beginning balance	686	1,022
Total gains /losses in income statement	38	(26)
Purchases	10	81
Sales	(53)	(260)
Net exchange difference	(26)	(131)
Transfers to disposal groups	0	0
Ending balance	655	686
Total unrealized gains and (losses) for the period recorded in the P&L for instruments held	€ 38	€ 22

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of fair value measurement of assets and liabilities [Line Items]
Amount of assets and liabilities transferred to Level III	€ 588,000,000	€ 1,077,000,000
Transferred of financial instruments from Level III to other levels of the fair value hierarchy	454,000,000	3,266,000,000
Available-for-sale (AFS)	€ 88,170,000,000	€ 109,860,000,000
Weighted average own credit spread used in the valuations of embedded derivatives in insurance contracts	0.20%	0.40%
Discount rates converge linearly	P10Y
Ultimate forward rate	4.25%
Uniform last liquid point for all Aegon's major currencies (EUR, USD and GBP)	P30Y
Credit spread [member] | Weighted average [member] | Corporate bonds [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Interest rate	2.60%	3.10%
Tax credit investments [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Discount rate used in valuation of tax credit investments	5.80%	5.60%
Net asset value [member] | Recurring fair value measurement [member] | Federal Home Loan Bank shares [Member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Available-for-sale (AFS)	€ 204,000,000	€ 237,000,000
Loans [member]
Disclosure of fair value measurement of assets and liabilities [Line Items]
Financial assets designated at fair value through profit or loss	€ 0

Fair Value - Information about

Fair Value - Information about Significant Unobservable Inputs (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	€ 139,711	€ 159,510
Debt securities [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	€ 84,344	€ 103,169
Level III [member] | Real estate held for own use [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Direct capitalization technique
Significant unobservable input	Capitalization rate
Level III [member] | Real estate held for own use [member] | Appraisal value [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Appraisal value
Significant unobservable input	n.a.
Level III [member] | Real estate held for own use [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Available-for-sale financial assets [member] | Shares [member] | Net asset value [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Net asset value
Significant unobservable input	n.a.
Level III [member] | Available-for-sale financial assets [member] | Shares [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Available-for-sale financial assets [member] | Debt securities [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Available-for-sale financial assets [member] | Debt securities [member] | Broker quote [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Broker quote
Significant unobservable input	n.a.
Level III [member] | Available-for-sale financial assets [member] | Debt securities [member] | Credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Discounted cash flow
Significant unobservable input	Credit spread
Level III [member] | Available-for-sale financial assets [member] | Other investments [member] | Net asset value [member] | Investment funds [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Net asset value
Significant unobservable input	n.a.
Level III [member] | Available-for-sale financial assets [member] | Other investments [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Available-for-sale financial assets [member] | Other investments [member] | Discounted cash flow [member] | Tax credit investments [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Discounted cash flow
Significant unobservable input	Discount rate
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Shares [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Debt securities [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other investments [member] | Net asset value [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Net asset value
Significant unobservable input	n.a.
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other investments [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Longevity swap [member] | Mortality rates [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Discounted cash flow
Significant unobservable input	Mortality
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Longevity swap [member] | Risk free rate [Member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Discounted cash flow
Significant unobservable input	Risk free rate
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Direct capitalization technique
Significant unobservable input	Capitalization rate
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member] | Appraisal value [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Appraisal value
Significant unobservable input	n.a.
Level III [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member] | Capitalization rates [member] | Direct capitalization technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Significant unobservable input	Capitalization rate
Level III [member] | Embedded derivatives [member] | Own credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Discounted cash flow
Significant unobservable input	Own credit spread
Level III [member] | Longevity swap liability [member] | Mortality rates [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Discounted cash flow
Significant unobservable input	Mortality
Level III [member] | Other [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Valuation technique	Other
Significant unobservable input	n.a.
Level III [member] | Bottom of range [member] | Real estate held for own use [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)		6.50%
Level III [member] | Bottom of range [member] | Available-for-sale financial assets [member] | Debt securities [member] | Credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	1.30%
Level III [member] | Bottom of range [member] | Available-for-sale financial assets [member] | Other investments [member] | Discounted cash flow [member] | Tax credit investments [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)		5.60%
Level III [member] | Bottom of range [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Longevity swap [member] | Risk free rate [Member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	0.21%
Level III [member] | Bottom of range [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	4.80%
Level III [member] | Bottom of range [member] | Embedded derivatives [member] | Own credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	0.40%
Level III [member] | Top of range [member] | Real estate held for own use [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)		9.50%
Level III [member] | Top of range [member] | Available-for-sale financial assets [member] | Debt securities [member] | Credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	3.37%
Level III [member] | Top of range [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Longevity swap [member] | Risk free rate [Member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	1.67%
Level III [member] | Top of range [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	10.50%
Level III [member] | Top of range [member] | Embedded derivatives [member] | Own credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	0.50%
Level III [member] | Weighted average [member] | Real estate held for own use [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)		7.90%
Level III [member] | Weighted average [member] | Available-for-sale financial assets [member] | Debt securities [member] | Credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	3.08%
Level III [member] | Weighted average [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Longevity swap [member] | Risk free rate [Member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	1.01%
Level III [member] | Weighted average [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	6.30%
Level III [member] | Weighted average [member] | Embedded derivatives [member] | Own credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Range (weighted average)	0.00%	0.40%
Level III [member] | Recurring fair value measurement [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	€ 6,689	€ 6,859
Level III [member] | Recurring fair value measurement [member] | Investments in real estate [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	4,065	3,415
Level III [member] | Recurring fair value measurement [member] | Real estate held for own use [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	307	332
Level III [member] | Recurring fair value measurement [member] | Real estate held for own use [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	35	34
Level III [member] | Recurring fair value measurement [member] | Real estate held for own use [member] | Direct capitalization technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	157	178
Level III [member] | Recurring fair value measurement [member] | Real estate held for own use [member] | Appraisal value [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	115	120
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	2,318	3,112
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Shares [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	288	393
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Shares [member] | Net asset value [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	231	262
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Shares [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	57	131
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Debt securities [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	1,447	1,966
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Debt securities [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	297	355
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Debt securities [member] | Broker quote [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	1,034	1,389
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Debt securities [member] | Credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	116	221
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Other investments [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	583	754
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Other investments [member] | Net asset value [member] | Investment funds [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	31	45
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Other investments [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	24	32
Level III [member] | Recurring fair value measurement [member] | Available-for-sale financial assets [member] | Other investments [member] | Discounted cash flow [member] | Tax credit investments [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	528	676
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	609	56
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Shares [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	604	50
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Debt securities [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	4	6
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other investments [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	1,255	1,257
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other investments [member] | Net asset value [member] | Investment funds [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	1,246	1,252
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other investments [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	9	5
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Longevity swap [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value		73
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Longevity swap [member] | Mortality rates [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	24	27
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Other [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	30	4
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Derivatives [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	54	104
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	2,147	1,999
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	155	193
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member] | Appraisal value [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	1,495	1,237
Level III [member] | Recurring fair value measurement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Investments in real estate [member] | Capitalization rates [member] | Direct capitalization technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	496	568
Level III [member] | Recurring fair value measurement [member] | Embedded derivatives [member] | Own credit spread [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	1,831	2,083
Level III [member] | Recurring fair value measurement [member] | Longevity swap liability [member] | Mortality rates [member] | Discounted cash flow [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	10
Level III [member] | Recurring fair value measurement [member] | Other [member] | Other valuation technique [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	3	384
Level III [member] | Recurring fair value measurement [member] | Derivatives [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Fair value	€ 1,845	€ 2,467

Fair Value - Information abo342

Fair Value - Information about Significant Unobservable Inputs (Parenthetical) (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Derivatives [member] | Level III [member]
Disclosure of significant unobservable inputs used in fair value measurement of assets and liabilities [line items]
Investments for account of policyholders	€ 3	€ 4

Fair Value - Effect of Changes

Fair Value - Effect of Changes in Significant Unobservable Assumptions to Reasonably Possible Alternatives (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Fair Value Financial Assets And Liabilities [Abstract]
Increase (decrease) in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, liabilities	€ 1,831	€ 2,083
Increase in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, liabilities	125	205
Decrease in fair value measurement due to change in one or more unobservable inputs to reflect reasonably possible alternative assumptions, liabilities	€ (120)	€ (194)

Fair Value - Carrying Values an

Fair Value - Carrying Values and Estimated Fair Values of Assets and Liabilities (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of fair value financial assets and liabilities [line items]
Financial assets	€ 134,658	€ 154,304
Total estimated fair value	139,711	159,510
Subordinated borrowings - held at amortized cost [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	953	844
Subordinated borrowings - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Financial liabilities	764	767
Total estimated fair value	953	844
Trust pass-through securities - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Financial liabilities	133	156
Total estimated fair value	137	141
Borrowings [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Financial liabilities	13,099	12,543
Total estimated fair value	13,499	12,935
Investment contracts - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Financial liabilities	16,665	19,217
Total estimated fair value	17,031	19,748
Mortgage loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Financial assets	33,562	33,696
Total estimated fair value	38,076	38,499
Private loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Financial assets	3,642	3,166
Total estimated fair value	4,181	3,569
Other loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Financial assets	2,164	2,441
Total estimated fair value	2,164	2,441
Level I [member] | Subordinated borrowings - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	791	703
Level I [member] | Borrowings [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	2,116	2,138
Level I [member] | Other loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	6
Level II [member] | Subordinated borrowings - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	162	140
Level II [member] | Trust pass-through securities - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	137	141
Level II [member] | Borrowings [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	28	31
Level II [member] | Investment contracts - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	9,676	8,951
Level II [member] | Private loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	64	52
Level II [member] | Other loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	1,991	2,292
Level III [member] | Borrowings [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	11,355	10,766
Level III [member] | Investment contracts - held at amortized cost [member] | Financial liabilities at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	7,356	10,797
Level III [member] | Mortgage loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	38,076	38,498
Level III [member] | Private loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	4,117	3,516
Level III [member] | Other loans - held at amortized cost [member] | Financial assets at amortised cost, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Total estimated fair value	€ 166	€ 148

Fair Value - Summary of carryin

Fair Value - Summary of carrying amounts of financial assets and financial liabilities that are classified as at fair value through profit or loss (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial assets at fair value through profit or loss [member]
Disclosure of fair value financial assets and liabilities [line items]
Trading	€ 5,508	€ 7,001
Designated	200,451	208,001
Financial liabilities at fair value through profit or loss, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Trading	6,792	8,386
Designated	37,705	43,413
Investment contracts for account of policyholders [member] | Financial assets at fair value through profit or loss [member]
Disclosure of fair value financial assets and liabilities [line items]
Designated	193,409	202,924
Investment contracts for account of policyholders [member] | Financial liabilities at fair value through profit or loss, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Designated	37,169	42,803
Derivatives with negative values not designated as hedges [member] | Financial assets at fair value through profit or loss [member]
Disclosure of fair value financial assets and liabilities [line items]
Trading	5,430	6,935
Derivatives with negative values not designated as hedges [member] | Financial liabilities at fair value through profit or loss, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Trading	6,792	8,386
Borrowings [member] | Financial liabilities at fair value through profit or loss, category [member]
Disclosure of fair value financial assets and liabilities [line items]
Designated	536	610
Investment income related to general account [member] | Financial assets at fair value through profit or loss [member]
Disclosure of fair value financial assets and liabilities [line items]
Trading	78	66
Designated	€ 7,042	€ 5,076

Fair Value - Gains and losses r

Fair Value - Gains and losses recognized in the income statement on financial assets and financial liabilities (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Fair Value Financial Assets And Liabilities [Abstract]
Trading	€ 13,924	€ 6,509
Designated	€ 5,679	€ 8,815

Commitments and Contingencies -

Commitments and Contingencies - Summary of Commitments through Purchase and Sale Transactions of Investments (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Real estate [member]
Disclosure of purchase and sale transactions of investments [line items]
Purchase	€ 196
Sale	39	€ 44
Mortgage loans [member]
Disclosure of purchase and sale transactions of investments [line items]
Purchase	3,152	424
Sale	69	78
Private loans [member]
Disclosure of purchase and sale transactions of investments [line items]
Purchase	705	44
Other [member]
Disclosure of purchase and sale transactions of investments [line items]
Purchase	€ 2,373	€ 1,314

Commitments and Contingencie348

Commitments and Contingencies - Summary of Future Minimum Lease Payments under Non-cancellable Operating Leases (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Not later than 1 year [member] | Operating lease obligations [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Operating leases	€ 74	€ 88
Not later than 1 year [member] | Operating lease rights [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Operating leases	41	53
1-5 years [member] | Operating lease obligations [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Operating leases	143	189
1-5 years [member] | Operating lease rights [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Operating leases	104	124
Later than 5 years [member] | Operating lease obligations [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Operating leases	201	231
Later than 5 years [member] | Operating lease rights [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Operating leases	€ 27	€ 32

Commitments and Contingencie349

Commitments and Contingencies - Summary of Other Commitments and Contingencies (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Other Commitments And Contingencies [Abstract]
Guarantees	€ 483	€ 682
Standby letters of credit	12	29
Share of contingent liabilities incurred in relation to interests in joint ventures	39	40
Other guarantees	16	18
Other commitments and contingent liabilities	€ 32	€ 12

Commitments and Contingencie350

Commitments and Contingencies - Additional Information (Detail) $ in Thousands, € in Millions, ¥ in Billions	12 Months Ended
	Dec. 31, 2017USD ($)FinancialCenters	Dec. 31, 2017EUR (€)FinancialCenters	Dec. 31, 2017JPY (¥)	Dec. 31, 2016USD ($)	Dec. 31, 2016EUR (€)
Disclosure of commitments and contingencies [Line Items]
Investigation provision		€ 85
Legal proceedings provisions		92			€ 11
Variable Funding Surplus Note [member]
Disclosure of commitments and contingencies [Line Items]
Variable funding surplus | $				$ 1,540,000
Guarantees [member]
Disclosure of commitments and contingencies [Line Items]
Other letter of credit agreements		1,322			1,505
Debt outstanding amount		1,322			1,505
Asset management [member]
Disclosure of commitments and contingencies [Line Items]
Investigation provision		40
Americas [member]
Disclosure of commitments and contingencies [Line Items]
Investigation provision		45
Aegon Sony Life Insurance Company [member]
Disclosure of commitments and contingencies [Line Items]
Contingent capital letter amount			¥ 6.5		49
Aegon N.V [member] | United States [member]
Disclosure of commitments and contingencies [Line Items]
Legal proceedings provisions		€ 1.5
Number of financial marketing units | FinancialCenters	1	1
Transamerica Corporation [member]
Disclosure of commitments and contingencies [Line Items]
Alleged actual damages andpre-judgment interest | $	$ 120,000
Amount of damages and interest | $	$ 235
Contractual dispute period, description	A former subsidiary of Transamerica Corporation was involved in a contractual dispute with a Nigerian travel broker that arose in 1976. That dispute was resolved in Delaware court for USD 235 thousand plus interest in 2010. The plaintiff took the Delaware judgment relating to the 1976 dispute to a Nigerian court and alleged that it was entitled to approximately the same damages for 1977 through 1984 despite the absence of any contract relating to those years. The Nigerian trial court issued a judgment in favor of the plaintiff of the alleged actual damages as well as pre-judgment interest of approximately USD 120 million. On appeal this decision was reversed on procedural grounds and remanded back to the trial court for further consideration. Aegon has no material assets located in Nigeria.	A former subsidiary of Transamerica Corporation was involved in a contractual dispute with a Nigerian travel broker that arose in 1976. That dispute was resolved in Delaware court for USD 235 thousand plus interest in 2010. The plaintiff took the Delaware judgment relating to the 1976 dispute to a Nigerian court and alleged that it was entitled to approximately the same damages for 1977 through 1984 despite the absence of any contract relating to those years. The Nigerian trial court issued a judgment in favor of the plaintiff of the alleged actual damages as well as pre-judgment interest of approximately USD 120 million. On appeal this decision was reversed on procedural grounds and remanded back to the trial court for further consideration. Aegon has no material assets located in Nigeria.
Transamerica Corporation [member] | Guarantees [member]
Disclosure of commitments and contingencies [Line Items]
Due and punctual payment of payables due under letter of credit agreements		€ 3,079			3,563
Transamerica Corporation [member] | Poland [member]
Disclosure of commitments and contingencies [Line Items]
Legal proceedings provisions					20
Transamerica Corporation [member] | TLIC Riverwood Reinsurance Inc [member]
Disclosure of commitments and contingencies [Line Items]
Cash payments of reinsurance obligations from subsidiary to third party		1,793			2,002
Transamerica Corporation and Commonwealth General Corporation [member] | Guarantees [member]
Disclosure of commitments and contingencies [Line Items]
Due and punctual payment of payables due under letter of credit agreements		3,025			3,720
Subsidiaries [member]
Disclosure of commitments and contingencies [Line Items]
Securities and notes issued under commercial paper program		585			633
Subsidiaries [member] | Guarantees [member]
Disclosure of commitments and contingencies [Line Items]
Other letter of credit agreements		€ 55			€ 104

Transfers of Financial Assets -

Transfers of Financial Assets - Summary of Carrying Amount of Financial Assets (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale financial assets [member] | Shares [member]
Disclosure of financial assets [line items]
Carrying amount of transferred assets	€ 114	€ 226
Carrying amount of associated liabilities	122	242
Available-for-sale financial assets [member] | Debt securities [member]
Disclosure of financial assets [line items]
Carrying amount of transferred assets	5,805	5,298
Carrying amount of associated liabilities	5,929	5,400
Financial assets at fair value through profit or loss [member] | Debt securities [member]
Disclosure of financial assets [line items]
Carrying amount of transferred assets	54	20
Carrying amount of associated liabilities	55	21
Financial assets at fair value through profit or loss [member] | Investment contracts for account of policyholders [member]
Disclosure of financial assets [line items]
Carrying amount of transferred assets	384	194
Carrying amount of associated liabilities	€ 93	€ 204

Transfers of Financial Asset352

Transfers of Financial Assets - Additional Information (Detail) - EUR (€)	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Transferred financial assets with continuing involvement that are derecognized in their entirely	€ 0	€ 0
Amount of collateral pledged for derivative transactions	2,234,000,000	2,688,000,000
The Netherlands [member]
Disclosure of financial assets [line items]
Mortgage loan pledged as security for notes issued	€ 6,500,000,000	€ 6,800,000,000

Transfers of Financial Asset353

Transfers of Financial Assets - Summary of Securities Lending (Detail) - Securities lending [member] - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Carrying amount of transferred financial assets	€ 4,987	€ 4,262
Fair value of cash collateral received	3,277	3,633
Fair value of non-cashcollateral received	1,847	1,077
Net exposure	(138)	(448)
Non-cash collateral that can be sold or repledged in the absence of default	1,550	991
Non-cash collateral that has been sold or transferred	€ 0	€ 0

Transfers of Financial Asset354

Transfers of Financial Assets - Summary of Reverse Repurchase Agreements (Detail) - Reverse repurchase agreements [member] - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Cash paid for reverse repurchase agreements	€ 4,859	€ 4,075
Fair value of non-cashcollateral received	4,885	4,103
Net exposure	(25)	(27)
Non-cash collateral that can be sold or repledged in the absence of default	4,166	3,288
Non-cash collateral that has been sold or transferred	€ 0	€ 0

Transfers of Financial Asset355

Transfers of Financial Assets - Summary of Carrying Amount of Collateral Pledged and the Corresponding Amounts (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets pledged for general account and contingent liabilities [member]
Disclosure of financial assets [line items]
General account (contingent) liabilities	€ 5,588	€ 6,440
Collateral pledged	6,951	8,115
Net exposure	(1,363)	(1,675)
Non-cash collateral that can be sold or repledged by the counterparty	0	0
Assets pledged for repurchase agreements [member]
Disclosure of financial assets [line items]
Cash received on repurchase agreements	1,373	1,489
Collateral pledged (transferred financial assets)	1,370	1,477
Net exposure	€ 3	€ 12

Offsetting, Enforceable Mast356

Offsetting, Enforceable Master Netting Arrangements and Similar Agreements - Summary of Financial Instruments Set Off in Statement of Financial Position (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of offsetting of financial assets and financial liabilities [line items]
Gross amounts of recognized financial assets	€ 5,823	€ 8,114
Gross amounts of recognized financial liabilities set off in the statement of financial position	0	0
Net amounts of financial assets presented in the statement of financial position	5,823	8,114
Related amounts not set off in the statements of financial position, Financial instruments	4,973	6,427
Related amounts not set off in the statements of financial position, Cash collateral received (excluding surplus collateral)	821	1,486
Net amount	30	201
Financial liabilities subject to offsetting, enforceable master netting arrangements and similar agreements
Gross amounts of recognized financial liabilities	5,185	6,689
Gross amounts of recognized financial assets set off in the statement of financial position	0	0
Net amounts of financial liabilities presented in the statement of financial position	5,185	6,689
Related amounts not set off in the statements of financial position, Financial instruments	5,145	6,570
Related amounts not set off in the statements of financial position, Cash collateral pledged (excluding surplus collateral)	2	20
Net amount	38	99
Derivatives [member]
Disclosure of offsetting of financial assets and financial liabilities [line items]
Gross amounts of recognized financial assets	5,823	8,114
Gross amounts of recognized financial liabilities set off in the statement of financial position	0	0
Net amounts of financial assets presented in the statement of financial position	5,823	8,114
Related amounts not set off in the statements of financial position, Financial instruments	4,973	6,427
Related amounts not set off in the statements of financial position, Cash collateral received (excluding surplus collateral)	821	1,486
Net amount	30	201
Financial liabilities subject to offsetting, enforceable master netting arrangements and similar agreements
Gross amounts of recognized financial liabilities	5,185	6,689
Gross amounts of recognized financial assets set off in the statement of financial position	0	0
Net amounts of financial liabilities presented in the statement of financial position	5,185	6,689
Related amounts not set off in the statements of financial position, Financial instruments	5,145	6,570
Related amounts not set off in the statements of financial position, Cash collateral pledged (excluding surplus collateral)	2	20
Net amount	€ 38	€ 99

Business Combinations - Additio

Business Combinations - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions, $ in Millions, zł in Billions	Dec. 28, 2017USD ($)	Nov. 01, 2017EUR (€)	Aug. 09, 2017	Jun. 28, 2017USD ($)	Jun. 28, 2017EUR (€)	Jan. 01, 2017EUR (€)	Jan. 01, 2017GBP (£)	Dec. 16, 2016	Aug. 11, 2016EUR (€)	Jul. 01, 2016EUR (€)	May 23, 2016EUR (€)	May 23, 2016GBP (£)	May 13, 2016USD ($)	May 13, 2016EUR (€)	May 03, 2016EUR (€)Customers	Apr. 11, 2016GBP (£)	Jan. 18, 2016EUR (€)	Dec. 07, 2015	Dec. 06, 2015	Sep. 25, 2015USD ($)	Sep. 07, 2015EUR (€)	Sep. 07, 2015GBP (£)	Sep. 01, 2015USD ($)	Sep. 01, 2015EUR (€)	Jun. 04, 2015EUR (€)	Mar. 03, 2015	Nov. 24, 2014EUR (€)	Jul. 31, 2015USD ($)	Jul. 31, 2015CAD ($)	Jul. 31, 2015EUR (€)	Jun. 30, 2017USD ($)	Jun. 30, 2017EUR (€)	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)	Jun. 30, 2017PLN (zł)	Jan. 01, 2017GBP (£)	Aug. 11, 2016GBP (£)	May 23, 2016GBP (£)	May 03, 2016GBP (£)	Sep. 25, 2015EUR (€)	Sep. 07, 2015GBP (£)	Sep. 01, 2015EUR (€)	Jul. 31, 2015EUR (€)
Disclosure of detailed information about business combination [Line Items]
Business combination consideration transferred																																		€ (52)
Fair value of net assets																																		139,711	€ 159,510
Cash included in the statement of financial position																																		3,720	3,727	€ 2,199
Net assets transferred																																€ 1,900					zł 8.1
Gain loss on disposal of Investment																																		431	327	349
Loss on reinsurance																																		34	45	€ 17
Revaluation reserve																																		4,920	€ 5,381
Americas [member]
Disclosure of detailed information about business combination [Line Items]
Reinsured liabilities | $				$ 14,000
Business disposal gain (loss)				$ 250	€ 231																												$ 979	905
Loss on the reinsurance transaction																																	1,813	1,675
Revaluation reserves and cash flow hedging reserve																																	1,018	941
Gains on sale of certain assets carried at amortized cost backing the insurance liabilities																																	94	87
Other expenses related to the transaction																																	$ 28	€ 26
Senior Bond [member]
Disclosure of detailed information about business combination [Line Items]
Redemption of bond | $																												$ 500
Bond interest rate																												4.625%	4.625%	4.625%
Bond maturity date																												December 2,015	December 2,015	December 2,015
BlackRock [member]
Disclosure of detailed information about business combination [Line Items]
Business combination consideration transferred															€ 15,000																										£ 12,000
Number of customer acquired | Customers															350,000
Cofunds Ltd [member]
Disclosure of detailed information about business combination [Line Items]
Business combination consideration transferred						€ 171			€ 164																													£ 147	£ 140
Fair value of net assets						116																																99
Customer intangibles recoginsed						29																																25
Goodwill recognised						56	£ 48
Investments not recognised						96,000	£ 82,000
Net cash impact						51																																44
Acquisition date									Jan. 1, 2017
Cofunds Ltd [member] | Cofunds [member]
Disclosure of detailed information about business combination [Line Items]
Cash included in the statement of financial position						€ 121																																£ 104
Mercer [member]
Disclosure of detailed information about business combination [Line Items]
Business combination consideration transferred																				$ 78																						€ 70
Acquisition date																				Dec. 31, 2015
Cash transferred																				$ 71																						64
Business combination contingent consideration																				$ 7																						€ 6
Aegon Life Insurance Company Ltd [member]
Disclosure of detailed information about business combination [Line Items]
Percentage of ownership in investment																		49.00%	26.00%
Aegon Nederland N.V. [member]
Disclosure of detailed information about business combination [Line Items]
Business disposal gain (loss)										€ 11
Annual premium volume																	€ 90
Insurance related liabilities																	334
Consideration received																	€ 302
UK annuity portfolio [member]
Disclosure of detailed information about business combination [Line Items]
Reinsured liabilities | £												£ 6,800
Business disposal gain (loss)											€ 682	530
Consideration received | £												3,000				£ 6,000
Business disposal tax benefit											53	41
Loss on reinsurance											2,400	1,900
Revaluation reserve											1,800																													£ 1,400
Sale of business disposal related bonds | £																																								£ 530
Cash outflow from sale of bonds											831	647
Business disposal expenses											€ 16	£ 13
Aegon Life Ukraine [member]
Disclosure of detailed information about business combination [Line Items]
Sale of interest percentage								100.00%
Aegons Canadian life insurance business [member]
Disclosure of detailed information about business combination [Line Items]
Business disposal gain (loss)																													$ 1,054	€ 751
Consideration received																													600	428
Business disposal expenses																													11	8
Business disposal consideration																													600																€ 428
Release of the foreign currency translation reserve																													178																127
Release of net foreign investment hedging reserve																													(72)																€ (51)
Release of available for sale reserve																													668	476
Net cash proceeds from disposal of business																													543	387
Business disposal consideration received in cash and cash equivalent																													$ 57	€ 41
Clark consulting [member]
Disclosure of detailed information about business combination [Line Items]
Business disposal gain (loss)																							$ 8	€ 7
Business disposal consideration																							177.5																					€ 160
Business disposal consideration received in cash and cash equivalent																							$ 13	€ 12
Seven investment management (7IM) [member]
Disclosure of detailed information about business combination [Line Items]
Business disposal gain (loss)																					€ 10	£ 7
Sale of interest percentage																					25.10%	25.10%
Business disposal consideration																					€ 26																						£ 19
La Banque Postale Asset Management (LBPAM) [member]
Disclosure of detailed information about business combination [Line Items]
Business combination consideration transferred																									€ 117
Percentage of interest acquired consideration Transferred																									25.00%
Transamerica financial advisors [member]
Disclosure of detailed information about business combination [Line Items]
Business disposal gain (loss)																															$ 58	€ 52
Consideration received													$ 49	€ 44
Contingent consideration received													$ 14	€ 13
Aegon Ireland Plc [member]
Disclosure of detailed information about business combination [Line Items]
Percentage of sale price			81.00%
Unirobe Mees Groep (UMG) [member]
Disclosure of detailed information about business combination [Line Items]
Total consideration received from sale of business		€ 295
Gain loss on disposal of Investment		208
Estimated decrease on future underlying earnings before tax as compared to 2017 levels		€ 20
Transamerica Corporation [member]
Disclosure of detailed information about business combination [Line Items]
Reinsured liabilities | $	$ 750,000
La Mondiale [member]
Disclosure of detailed information about business combination [Line Items]
Business disposal gain (loss)																											€ 350
Sale of interest percentage																										35.00%
Solvency ratio increase percentage point																											4.00%

Group Companies - Additional In

Group Companies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	50.00%
Asset Management [member] | Aegon Industrial Fund Management Co Ltd [Member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in associate	49.00%
Name of associate	Aegon Industrial Fund Management Co., Ltd
Country of incorporation of associate	China
Aegon Asset Management Holding B.V. [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Asset Management Holding B.V.
Country of incorporation or residence of subsidiary	The Netherlands
Aegon Custody BV [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Custody BV
Country of incorporation or residence of subsidiary	The Netherlands
Aegon Asset Management Pan Europe BV [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Asset Management Pan-Europe B.V
Country of incorporation or residence of subsidiary	The Netherlands
Kames Capital Holdings Ltd [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Kames Capital plc
Country of incorporation or residence of subsidiary	United Kingdom
TKP Investments B.V. [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	TKP Investments B.V.
Country of incorporation or residence of subsidiary	The Netherlands
Aegon USA Investment Management, LLC [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon USA Investment Management, LLC
Country of incorporation or residence of subsidiary	United States
Aegon USA Realty Advisors, LLC [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon USA Realty Advisors, LLC
Country of incorporation or residence of subsidiary	United States
Aegon Hungary Asset Management Company ZrtA [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Magyarország Befektetési Alapkezel Zártkören Mköd Részvénytársaság
Country of incorporation or residence of subsidiary	Hungary
Aegon Investment Management B. V [member] | Asset Management [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Investment Management B.V
Country of incorporation or residence of subsidiary	The Netherlands
Akaan-Aegon, S.A.P.I. de C.V. [member]
Disclosure of subsidiaries [Line Items]
Proportion of voting power held in joint venture	50.00%
Americas [member] | Transamerica Advisors Life Insurance Company [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Transamerica Advisors Life Insurance Company
Country of incorporation or residence of subsidiary	United States
Americas [member] | Transamerica Casualty Insurance Company [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Transamerica Casualty Insurance Company
Country of incorporation or residence of subsidiary	United States
Americas [member] | Transamerica Corporation [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Transamerica Corporation
Country of incorporation or residence of subsidiary	United States
Americas [member] | Transamerica Financial Life Insurance Company [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Transamerica Financial Life Insurance Company
Country of incorporation or residence of subsidiary	United States
Americas [member] | Transamerica Life Insurance Company [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Transamerica Life Insurance Company
Country of incorporation or residence of subsidiary	United States
Americas [member] | Transamerica Premier Life Insurance Company [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Transamerica Premier Life Insurance Company
Country of incorporation or residence of subsidiary	United States
Americas [member] | Akaan-Aegon, S.A.P.I. de C.V. [member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	99.99%
Name of joint venture	Akaan-Aegon, S.A.P.I. de C.V
Country of incorporation of joint venture	Mexico
The Netherlands [member] | Aegon Bank N.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Bank N.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Aegon Hypotheken B.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Hypotheken B.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Aegon Levensverzekering N.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Levensverzekering N.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Aegon Schadeverzekering N.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Schadeverzekering N.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Aegon Spaarkas N.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Spaarkas N.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Optas Pensioenen N.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Optas Pensioenen N.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | TKP Pensioen B.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	TKP Pensioen B.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Unirobe Meeus Groep B.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Unirobe Meeùs Groep B.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Aegon PPI B.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon PPI B.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | Cappital Premiepensioeninstelling B.V. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	CAPPITAL Premiepensioeninstelling B.V.
Country of incorporation or residence of subsidiary	Netherlands
The Netherlands [member] | AMVEST Vastgoed B.V. [Member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	50.00%
Name of joint venture	AMVEST Vastgoed B.V.
United Kingdom [member] | Aegon Investment Solutions Ltd. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Investment Solutions Ltd.
Country of incorporation or residence of subsidiary	United Kingdom
United Kingdom [member] | Scottish Equitable plc [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Scottish Equitable plc
Country of incorporation or residence of subsidiary	United Kingdom
United Kingdom [member] | Cofunds Ltd [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Cofunds Limited
Country of incorporation or residence of subsidiary	United Kingdom
Central & Eastern Europe [member] | Aegon Magyarorszag Altalanos Biztosito Zartkoruen Mukodo Reszvenytarsasag [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Magyarország Általános Biztosító Zártkören Mköd Részvénytársaság
Country of incorporation or residence of subsidiary	Hungary
Central & Eastern Europe [member] | Aegon Towarzystwo Ubezpieczenna Zycie Spolka Akcyjna [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Towarzystwo Ubezpiecze na ycie Spóka Akcyjna
Country of incorporation or residence of subsidiary	Poland
Central & Eastern Europe [member] | Aegon Powszechne Towarzystwo Emerytaine Spolka Akcyjna [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Powszechne Towarzystwo Emerytaine Spólka Akcyjna
Country of incorporation or residence of subsidiary	Poland
Central & Eastern Europe [member] | Aegon Emeklilikve Hayat A.S. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Emeklilik ve Hayat A.S.
Country of incorporation or residence of subsidiary	Turkey
Central & Eastern Europe [member] | Aegon Pensii Societatede Administrarea Fondurilorde Pensii Private A.S. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Pensii Societate de Administrare a Fondurilor de Pensii Private S.A.
Country of incorporation or residence of subsidiary	Romania
Central & Eastern Europe [member] | Aegon Pojistovna A.S. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Pojištovna, a.s.
Country of incorporation or residence of subsidiary	Czech Republic
Central & Eastern Europe [member] | Aegon Zivotnapoist Ovna A.S. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Životná poist’ovňa, a.s.
Country of incorporation or residence of subsidiary	Slovakia
Central & Eastern Europe [member] | Aegon, d.s.s., a.s. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon, d.s.s., a.s.
Country of incorporation or residence of subsidiary	Slovakia
Spain & Portugal [member] | Aegon Espana S.A.U [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon España S.A.U. de Seguros y Reaseguros
Country of incorporation or residence of subsidiary	Spain
Spain & Portugal [member] | Aegon Administracion y Servicios A.I.E. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Administracion y Servicios A.I.E.
Country of incorporation or residence of subsidiary	Spain
Spain & Portugal [member] | Aegon Activos A.V., S.A. [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Activos A.V., S.A.
Country of incorporation or residence of subsidiary	Spain
Spain & Portugal [member] | Aegon Mediacion, SLU [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Mediacion, S.L.U
Country of incorporation or residence of subsidiary	Spain
Spain & Portugal [member] | Aegon Santander Generales Seguros y Reaseguros, S.A. [member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	51.00%
Name of joint venture	Santander Generales Seguros y Reaseguros, S.A.
Country of incorporation of joint venture	Spain
Spain & Portugal [member] | Aegon Santander Portugal Vida Companhia de Seguros de Vida SA Lisbon [member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	51.00%
Name of joint venture	Aegon Santander Portugal Vida – Companhia de Seguros de Vida S.A.
Country of incorporation of joint venture	Portugal
Spain & Portugal [member] | Aegon Santander Portugal Nao Vida Companhiade Seguros S. A. [member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	51.00%
Name of joint venture	Aegon Santander Portugal Nao Vida - Companhia de Seguros S.A.
Country of incorporation of joint venture	Portugal
Spain & Portugal [member] | Aegon Santander Vida Segurosy Reaseguros S. A. [m ember]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	51.00%
Name of joint venture	Aegon Santander Vida Seguros y Reaseguros, S.A.
Country of incorporation of joint venture	Spain
Spain & Portugal [member] | Liberbank Viday Pensiones Segurosy Reaseguros S. A. [member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	50.00%
Name of joint venture	Liberbank Vida y Pensiones, Seguros y Reaseguros, S.A.
Country of incorporation of joint venture	Spain
Asia [member] | Transamerica Life (Bermuda) Ltd [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Transamerica Life (Bermuda) Ltd.
Country of incorporation or residence of subsidiary	Bermuda
Asia [member] | Aegon Insights Limited [member]
Disclosure of subsidiaries [Line Items]
Name of subsidiary	Aegon Insights Limited
Country of incorporation or residence of subsidiary	Hong Kong
Asia [member] | Aegon Sony Life Insurance Co [Member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	50.00%
Name of joint venture	Aegon Sony Life Insurance Co.
Country of incorporation of joint venture	Japan
Asia [member] | Aegon THTF Life Insurance Company Ltd [member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	50.00%
Name of joint venture	Aegon THTF Life Insurance Co., Ltd.
Country of incorporation of joint venture	China
Asia [member] | SA Reinsurance Ltd [member]
Disclosure of subsidiaries [Line Items]
Proportion of ownership interest in joint venture	50.00%
Name of joint venture	SA Reinsurance Ltd
Country of incorporation of joint venture	Bermuda

Group Companies - Additional359

Group Companies - Additional Information - Associates (Detail)	12 Months Ended
	Dec. 31, 2017
La Banque Postale Asset Management (LBPAM) [member] | Asset Management [member]
Disclosure of associates [Line Items]
Proportion of ownership interest in associate	25.00%
Name of associate	La Banque Postale Asset Management
Country of incorporation of associate	France
Americas [member] | Aegon Life Insurance Company [member]
Disclosure of associates [Line Items]
Proportion of ownership interest in associate	50.00%
Name of associate	Mongeral Aegon, Seguros e Previdencia S.A.
Country of incorporation of associate	Brazil

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - EUR (€)	Dec. 19, 2017	Jun. 23, 2017	May 19, 2017	Jun. 06, 2016	May 19, 2016	Nov. 13, 2015	May 21, 2015	Jan. 01, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of transactions between related parties [Line Items]
Total remuneration									€ 932,375	€ 935,875	€ 1,052,000
Employee expenses									€ 2,234,000,000	€ 2,287,000,000	€ 2,280,000,000
Proportion of variable compensation payable in next fiscal year									40.00%	40.00%	40.00%
Proportion of variable compensation equally payable in second third and fourth year									60.00%	60.00%	60.00%
Defined benefit pension contributions									€ 318,000,000	€ 338,000,000	€ 335,000,000
Defined benefit obligation service cost									158,000,000	140,000,000	144,000,000
VAT liable amount									(195,799)	(196,534)	(220,920)
Total expenses for the members of the Executive Board									5,300,000	8,000,000	7,100,000
Additional employer wage tax, estimated									€ 0	1,394,000
Shares held in the entity that do not exceed the total of outstanding share capital, percentage									1.00%
Members of Management Board [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									€ 19,800,000	18,600,000	15,200,000
Other benefits for members of Management Board									900,000	1,900,000	1,600,000
Pension premiums for members of Management Board									3,700,000	3,400,000	2,500,000
Employee expenses									18,300,000	18,700,000	16,800,000
Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									€ 1,646,000	1,791,000	1,707,000
Variable compensation [member]
Disclosure of transactions between related parties [Line Items]
Variable compensation, description									Variable compensation is split 50/50 in a cash payment and an allocation of shares.
Variable compensation [member] | Members of Management Board [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									€ 7,800,000	6,400,000	4,900,000
Employee expenses									6,300,000	6,000,000	5,000,000
Fixed Compensation [member] | Members of Management Board [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									7,400,000	7,000,000	6,300,000
Fixed Compensation [member] | Executive Board Management [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									6,000,000	7,300,000	6,000,000
Pensions [member] | Members of Management Board [member]
Disclosure of transactions between related parties [Line Items]
Employee expenses									3,700,000	3,200,000	3,400,000
Vereniging Aegon [member] | Common shares [member]
Disclosure of transactions between related parties [Line Items]
Number of shares repurchased					13,450,835
Number of shares repurchased, value					€ 58,000,000
Number of trading days					5 days
Amount authorized under share repurchase program					€ 400,000,000
Percentage of shares repurchased					14.50%
Vereniging Aegon [member] | Common shares B [member]
Disclosure of transactions between related parties [Line Items]
Number of shares repurchased	13,042,592	13,042,612	1,979,260	17,324,960
Number of shares repurchased, value	€ 1,725,169.73			€ 1,968,332
Proportion of value weight average price of common shares of 5 trading days	0.025%	0.025%	0.025%	0.025%
Number of trading days	5 days			5 days
Proportion of voting rights held by related party	32.60%			32.60%
Number of shares purchased on exercising options rights						760	3,686,000	9,680
Proportion of market value of common shares in capital						0.025%	0.025%	0.025%
Number of shares purchased on exercising options rights						760	3,686,000	9,680
Alex Wynaendts [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									4,683,000	4,538,000	3,446,000
Defined benefit pension contributions									1,733,000	1,666,000	1,962,000
Expense on IFRS accounting treatment in income statement									€ 4,258,000	€ 4,086,000	4,167,000
Shares held in the entity									448,601	401,948
Alex Wynaendts [member] | Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									€ 1,147,000	€ 1,044,000	923,000
Employee expenses									1,092,000	956,000	900,000
Alex Wynaendts [member] | Variable compensation [member]
Disclosure of transactions between related parties [Line Items]
Cash compensation									€ 229,000	€ 209,000	€ 185,000
Compensation, number of shares									43,732	40,722	30,219
Cash compensation									€ 344,000	€ 313,000	€ 277,000
Compensation, number of shares									65,598	61,083	45,330
Darryl Button [member]
Disclosure of transactions between related parties [Line Items]
Employee expenses										€ 1,237,000,000	€ 995,000,000
Darryl Button [member] | Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									€ 0	747,000	784,000
Darryl Button [member] | Variable compensation [member]
Disclosure of transactions between related parties [Line Items]
Cash compensation										€ 149,000	€ 157,000
Compensation, number of shares										29,614	23,621
Cash compensation										€ 224,000	€ 235,000
Compensation, number of shares										44,424	35,433
Matt Rider [member]
Disclosure of transactions between related parties [Line Items]
Defined benefit obligation service cost									175,000	€ 0	€ 0
VAT liable amount									1,342,000
Expense on IFRS accounting treatment in income statement									€ 1,088,000	0	0
Shares held in the entity									0
Matt Rider [member] | Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration									€ 499,000	€ 0	€ 0
Employee expenses									293,000,000
Matt Rider [member] | Variable compensation [member]
Disclosure of transactions between related parties [Line Items]
Cash compensation									€ 100,000
Compensation, number of shares									19,017
Cash compensation									€ 150,000
Compensation, number of shares									28,522

Related Party Transactions - Su

Related Party Transactions - Summary of Compensation and Various Related Expenses for members of Executive Board (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of transactions between related parties [Line Items]
Total remuneration	€ 932,375	€ 935,875	€ 1,052,000
Fixed Compensation [member] | Members of Executive Board [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	1,829,000	2,202,000	2,145,000
Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	1,646,000	1,791,000	1,707,000
Alex Wynaendts [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	4,683,000	4,538,000	3,446,000
Alex Wynaendts [member] | Fixed Compensation [member] | Members of Executive Board [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	1,269,000	1,269,000	1,154,000
Alex Wynaendts [member] | Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	1,147,000	1,044,000	923,000
Matt Rider [member] | Fixed Compensation [member] | Members of Executive Board [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	560,000	0	0
Matt Rider [member] | Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	499,000	0	0
Darryl Button [member] | Fixed Compensation [member] | Members of Executive Board [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	0	933,000	991,000
Darryl Button [member] | Conditional Variable Compensation Awards [member]
Disclosure of transactions between related parties [Line Items]
Total remuneration	€ 0	€ 747,000	€ 784,000

Related Party Transactions -362

Related Party Transactions - Summary of Compensation and Various Related Expenses for members of Executive Board (Parenthetical) (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of transactions between related parties [Line Items]
Employee expenses	€ 2,234,000	€ 2,287,000	€ 2,280,000
Matt Rider [member]
Disclosure of transactions between related parties [Line Items]
Annual base salary	€ 900
Darryl Button [member]
Disclosure of transactions between related parties [Line Items]
Employee expenses		€ 1,237,000	€ 995,000

Related Party Transactions - De

Related Party Transactions - Detailed Information About Conditionally Awarded Cash And Shares of the Members of the Executive Board (Detail)	Dec. 31, 2017EUR (€)shares
Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	509,055
Total number of shares | €	€ 2,608,378
Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	47,539
Total number of shares | €	€ 249,390
Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	205,066
Total number of shares | €	€ 1,205,945
Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	82,468
Total number of shares | €	€ 323,226
2007 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,253
2011 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	17,304
Total number of shares | €	€ 81,795
2011 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	11,250
Total number of shares | €	€ 53,180
2012 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	65,110
Total number of shares | €	€ 203,536
2012 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	44,740
Total number of shares | €	€ 139,858
2013 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	62,943
Total number of shares | €	€ 309,489
2013 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	28,716
Total number of shares | €	€ 140,301
2013 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	26,478
Total number of shares | €	€ 130,188
2014 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	67,761
Total number of shares | €	€ 456,643
2014 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	43,258
Total number of shares | €	€ 300,120
2015 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	75,549
Total number of shares | €	€ 461,305
2015 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	59,054
Total number of shares | €	€ 392,155
2016 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	101,805
Total number of shares | €	€ 522,060
2016 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	74,038
Total number of shares | €	€ 373,369
2017 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	109,330
Total number of shares | €	€ 573,550
2017 [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	47,539
Total number of shares | €	€ 249,390
> 12 months [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	97,945
Total number of shares | €	€ 469,382
> 12 months [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	26,874
Total number of shares | €	€ 166,815
> 12 months [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	42,446
Total number of shares | €	€ 166,505
> 12 months [member] | 2011 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	17,304
Total number of shares | €	€ 81,795
> 12 months [member] | 2011 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	11,250
Total number of shares | €	€ 53,180
> 12 months [member] | 2012 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	32,555
Total number of shares | €	€ 101,768
> 12 months [member] | 2012 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	22,370
Total number of shares | €	€ 69,929
> 12 months [member] | 2013 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	20,981
Total number of shares | €	€ 103,163
> 12 months [member] | 2013 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,572
Total number of shares | €	€ 46,767
> 12 months [member] | 2013 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	8,826
Total number of shares | €	€ 43,396
> 12 months [member] | 2014 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	27,105
Total number of shares | €	€ 182,656
> 12 months [member] | 2014 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	17,302
Total number of shares | €	€ 120,048
12-24 months [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	106,560
Total number of shares | €	€ 480,782
12-24 months [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	41,845
Total number of shares | €	€ 263,653
12-24 months [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	31,196
Total number of shares | €	€ 113,325
12-24 months [member] | 2007 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,253
12-24 months [member] | 2012 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	32,555
Total number of shares | €	€ 101,768
12-24 months [member] | 2012 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	22,370
Total number of shares | €	€ 69,929
12-24 months [member] | 2013 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	20,981
Total number of shares | €	€ 103,163
12-24 months [member] | 2013 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,572
Total number of shares | €	€ 46,767
12-24 months [member] | 2013 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	8,826
Total number of shares | €	€ 43,396
12-24 months [member] | 2014 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	13,552
Total number of shares | €	€ 91,329
12-24 months [member] | 2014 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	8,652
Total number of shares | €	€ 60,024
12-24 months [member] | 2015 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	30,219
Total number of shares | €	€ 184,522
12-24 months [member] | 2015 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	23,621
Total number of shares | €	€ 156,862
Later than two years and not later than three years [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	90,365
Total number of shares | €	€ 495,577
Later than two years and not later than three years [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	59,649
Total number of shares | €	€ 334,569
Later than two years and not later than three years [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	8,826
Total number of shares | €	€ 43,396
Later than two years and not later than three years [member] | 2013 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	20,981
Total number of shares | €	€ 103,163
Later than two years and not later than three years [member] | 2013 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,572
Total number of shares | €	€ 46,767
Later than two years and not later than three years [member] | 2013 [member] | Jan J Nooitgedagt [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	8,826
Total number of shares | €	€ 43,396
Later than two years and not later than three years [member] | 2014 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	13,552
Total number of shares | €	€ 91,329
Later than two years and not later than three years [member] | 2014 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	8,652
Total number of shares | €	€ 60,024
Later than two years and not later than three years [member] | 2015 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	15,110
Total number of shares | €	€ 92,261
Later than two years and not later than three years [member] | 2015 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	11,811
Total number of shares | €	€ 78,431
Later than two years and not later than three years [member] | 2016 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	40,722
Total number of shares | €	€ 208,824
Later than two years and not later than three years [member] | 2016 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	29,614
Total number of shares | €	€ 149,347
Later than three years and not later than four years [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	92,755
Total number of shares | €	€ 517,422
Later than three years and not later than four years [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	19,015
Total number of shares | €	€ 99,756
Later than three years and not later than four years [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	35,271
Total number of shares | €	€ 213,129
Later than three years and not later than four years [member] | 2014 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	13,552
Total number of shares | €	€ 91,329
Later than three years and not later than four years [member] | 2014 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	8,652
Total number of shares | €	€ 60,024
Later than three years and not later than four years [member] | 2015 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	15,110
Total number of shares | €	€ 92,261
Later than three years and not later than four years [member] | 2015 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	11,811
Total number of shares | €	€ 78,431
Later than three years and not later than four years [member] | 2016 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	20,361
Total number of shares | €	€ 104,412
Later than three years and not later than four years [member] | 2016 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	14,808
Total number of shares | €	€ 74,674
Later than three years and not later than four years [member] | 2017 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	43,732
Total number of shares | €	€ 229,420
Later than three years and not later than four years [member] | 2017 [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	19,015
Total number of shares | €	€ 99,756
Later than four years and not later than five years [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	57,337
Total number of shares | €	€ 311,383
Later than four years and not later than five years [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,508
Total number of shares | €	€ 49,878
Later than four years and not later than five years [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	26,619
Total number of shares | €	€ 153,105
Later than four years and not later than five years [member] | 2015 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	15,110
Total number of shares | €	€ 92,261
Later than four years and not later than five years [member] | 2015 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	11,811
Total number of shares | €	€ 78,431
Later than four years and not later than five years [member] | 2016 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	20,361
Total number of shares | €	€ 104,412
Later than four years and not later than five years [member] | 2016 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	14,808
Total number of shares | €	€ 74,674
Later than four years and not later than five years [member] | 2017 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	21,866
Total number of shares | €	€ 114,710
Later than four years and not later than five years [member] | 2017 [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,508
Total number of shares | €	€ 49,878
Later than five years and not later than six years [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	42,227
Total number of shares | €	€ 219,122
Later than five years and not later than six years [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,508
Total number of shares | €	€ 49,878
Later than five years and not later than six years [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	14,808
Total number of shares | €	€ 74,674
Later than five years and not later than six years [member] | 2016 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	20,361
Total number of shares | €	€ 104,412
Later than five years and not later than six years [member] | 2016 [member] | Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	14,808
Total number of shares | €	€ 74,674
Later than five years and not later than six years [member] | 2017 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	21,866
Total number of shares | €	€ 114,710
Later than five years and not later than six years [member] | 2017 [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,508
Total number of shares | €	€ 49,878
Later than six years and not later than seven years [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	21,866
Total number of shares | €	€ 114,710
Later than six years and not later than seven years [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,508
Total number of shares | €	€ 49,878
Later than six years and not later than seven years [member] | 2017 [member] | Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	21,866
Total number of shares | €	€ 114,710
Later than six years and not later than seven years [member] | 2017 [member] | Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total number of shares	9,508
Total number of shares | €	€ 49,878

Related Party Transactions -364

Related Party Transactions - Detailed Information About Conditionally Awarded Cash And Shares of the Members of the Executive Board (Parenthetical) (Detail) - EUR (€)	May 20, 2016	May 21, 2015	May 31, 2017	Dec. 31, 2017
Disclosure of key management personnel compensation [Line Items]
Vesting price	€ 4.5020	€ 7.2428	€ 4.4230
2007 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average share vesting percentage				50.00%
2011 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average price per share				€ 4.727
Vesting period				3 years
2012 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average price per share				€ 3.126
Vesting period				3 years
2013 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average price per share				€ 4.917
Vesting period				3 years
2014 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average price per share				€ 6.739
Vesting period				3 years
2015 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average price per share				€ 6.106
Vesting period				3 years
2016 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average price per share				€ 5.128
Vesting period				3 years
2017 [member]
Disclosure of key management personnel compensation [Line Items]
Weighted average price per share				€ 5.246
Vesting period				3 years

Related Party Transactions Info

Related Party Transactions Information About Other Benefits (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of key management personnel compensation [Line Items]
Other benefits	€ 224	€ 917	€ 679
Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Other benefits	165	178	151
Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Other benefits	59	0	0
Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Other benefits	€ 0	€ 739	€ 528

Related Party Transactions - In

Related Party Transactions - Information About Pension Contributions (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of key management personnel compensation [Line Items]
Total pension contributions	€ 1,894	€ 2,006	€ 1,434
Alex Wynaendts [member]
Disclosure of key management personnel compensation [Line Items]
Total pension contributions	1,670	1,631	1,219
Matt Rider [member]
Disclosure of key management personnel compensation [Line Items]
Total pension contributions	224	0	0
Darryl Button [member]
Disclosure of key management personnel compensation [Line Items]
Total pension contributions	€ 0	€ 375	€ 215

Related Party Transactions -367

Related Party Transactions - Information About Remuneration retired Members of Supervisory Board (Detail)	12 Months Ended
	Dec. 31, 2017EUR (€)Meeting	Dec. 31, 2016EUR (€)Meeting	Dec. 31, 2015EUR (€)Meeting
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	€ 932,375	€ 935,875	€ 1,052,000
VAT liable on Supervisory Board remuneration	195,799	196,534	220,920
Total	1,128,174	1,132,409	1,272,920
Leo M. van Wijk (up to May 20, 2015) [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board			38,625
Irving W. Bailey, II (up to May 20, 2016) [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board		53,625	135,000
Shemaya Levy [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	40,375	95,250	101,000
Active [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	892,000	787,000	777,375
Active [member] | Robert J Routs [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	134,000	140,000	143,000
Active [member] | William L. Connelly [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	60,125
Active [member] | Robert W Dineen [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	104,000	115,000	121,000
Active [member] | Mark A. Ellman [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	70,125
Active [member] | Ben J. Noteboom (as of May 20, 2015) [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	101,500	109,000	69,250
Active [member] | Ben Van Der Veer [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	106,000	109,000	115,000
Active [member] | Dirk P M Verbeek [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	100,000	111,000	112,125
Active [member] | Corien M Wortmann Kool [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	100,750	90,000	96,000
Active [member] | Dona D Young [member]
Disclosure of key management personnel compensation [Line Items]
Remuneration of active and retired members of the supervisory board	115,500	€ 113,000	€ 121,000
Extra Board meetings [member]
Disclosure of key management personnel compensation [Line Items]
Attendance fee	€ 3,000
Regular Supervisory Board meetings [member]
Disclosure of key management personnel compensation [Line Items]
Number of board meeting | Meeting	7	8	7
Attendance fee	€ 0	€ 0	€ 0

Related Party Transactions - Co

Related Party Transactions - Common shares held by Supervisory Board members (Detail) - Supervisory Board [Member] - shares	Dec. 31, 2017	Dec. 31, 2016
Disclosure of key management personnel compensation [Line Items]
Common shares held by Supervisory Board members	49,221	49,221
Robert W Dineen [member]
Disclosure of key management personnel compensation [Line Items]
Common shares held by Supervisory Board members	10,000	10,000
Ben J. Noteboom (as of May 20, 2015) [member]
Disclosure of key management personnel compensation [Line Items]
Common shares held by Supervisory Board members	23,500	23,500
Ben Van Der Veer [member]
Disclosure of key management personnel compensation [Line Items]
Common shares held by Supervisory Board members	1,450	1,450
Dirk P M Verbeek [member]
Disclosure of key management personnel compensation [Line Items]
Common shares held by Supervisory Board members	1,011	1,011
Dona D Young [member]
Disclosure of key management personnel compensation [Line Items]
Common shares held by Supervisory Board members	13,260	13,260

Results from financial trans369

Results from financial transactions - Summary of Results from Financial Transactions (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of result from financial transaction [Line Items]
Net fair value change of derivatives	€ (1,159)	€ 239	€ 123
Net foreign currency gains and (losses)	(20)	41	€ (29)
Aegon N.V [member]
Disclosure of result from financial transaction [Line Items]
Net fair value change of derivatives	56	(68)
Net foreign currency gains and (losses)		(2)
Net fair value change on borrowings and other financial liabilities		2
Total	€ 56	€ (68)

Income tax - Components of Inco

Income tax - Components of Income Tax for Period (Income) / Charge (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income tax expense benefits [line items]
Current Tax - Current Tax	€ 220	€ 33	€ 111
Current Tax - Adjustment to prior years	47	(46)	(70)
Income tax for the period (income) / charge	267	(13)	42
Reconciliation between standard and effective tax
Income before tax	2,534	610	(514)
Differences due to the effect of:
Non deductible expenses	(28)	(21)	(49)
Adjustment to prior years	(2)	34	17
Income tax (expense) / benefit	(65)	(172)	€ 83
Aegon N.V [member]
Income tax expense benefits [line items]
Current Tax - Current Tax	1	25
Current Tax - Adjustment to prior years	0	0
Income tax for the period (income) / charge	1	25
Reconciliation between standard and effective tax
Income before tax	(43)	(121)
Tax on income	11	30
Differences due to the effect of:
Non deductible expenses	(11)	(6)
Adjustment to prior years	0	0
Income tax (expense) / benefit	€ 1	€ 25

Shares in Group Companies - Sum

Shares in Group Companies - Summary of Shares in Group Companies (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of interests in other entities [Line Items]
Dividend received	€ (118)	€ (196)
Aegon N.V [member]
Disclosure of interests in other entities [Line Items]
At January 1	22,219	23,992
Capital contributions and acquisitions	1,006	210
Divestments and capital repayments	(698)	(895)
Dividend received	(120)	(181)
Net income / (loss) for the financial year	2,511	533	€ (394)
Revaluations	(1,799)	(1,440)
Ending balance	€ 23,117	€ 22,219	€ 23,992

Loans to Group Companies - Summ

Loans to Group Companies - Summary of Loans to Group Companies (Detail) - Aegon N.V [member] - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans to group companies - long-term
Beginning balance	€ 1,934	€ 3,137
Additions / (repayments)	(427)	(1,248)
Transfer to short term	(829)
Other changes	(239)	45
Ending balance	439	1,934
Loans to group companies - short-term
Beginning balance	2,189	1,392
Additions / (repayments)	(563)	746
Transfer from long term	829
Other changes	(204)	51
Ending balance	2,251	2,189
Total	€ 2,690	€ 4,123

Receivables - Additional Inform

Receivables - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of receivables [Line Items]
Income tax receivable	€ 85	€ 477
Aegon N.V [member]
Disclosure of receivables [Line Items]
Income tax receivable	€ 130	€ 219
Aegon N.V [member] | Top of range [member]
Disclosure of receivables [Line Items]
Receivables from group companies and other receivables, maturity	1 year

Other Assets - Additional Infor

Other Assets - Additional Information (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other assets [Line Items]
Other assets include derivatives	€ 36,883	€ 32,152
Aegon N V [member] | Fair value [member]
Disclosure of other assets [Line Items]
Other assets include derivatives	€ 70	€ 135

Share Capital - Detailed Inform

Share Capital - Detailed Information of Issued and outstanding Capital (Detail) - EUR (€) € / shares in Units, € in Millions, shares in Millions	Dec. 31, 2017	May 31, 2017	Dec. 31, 2016
Disclosure of classes of share capital [Line Items]
Common shares	€ 322		€ 319
Common Share [member]
Disclosure of classes of share capital [Line Items]
Common shares	251		249
Authorized share capital	€ 720		€ 720
Number of authorized shares (in million)	6,000		6,000
Par value in cents per share	€ 0.12		€ 0.12
Common Share B [member]
Disclosure of classes of share capital [Line Items]
Common shares	€ 70		€ 70
Authorized share capital	€ 360		€ 360
Number of authorized shares (in million)	3,000		3,000
Par value in cents per share	€ 0.12	€ 0.12	€ 0.12

Share Capital - Additional Info

Share Capital - Additional Information (Detail) - EUR (€)	Dec. 19, 2017	Jun. 23, 2017	May 19, 2017	Jun. 06, 2016	Nov. 13, 2015	May 21, 2015	Jan. 01, 2015	Jun. 30, 2016	Dec. 31, 2017	Dec. 31, 2016
Disclosure of changes in share capital [Line Items]
Share buyback program, number of common shares repurchased									13,042,592
Vereniging Aegon [member]
Disclosure of changes in share capital [Line Items]
Percentage of shareholding stake in acquired company	32.60%
Vereniging Aegon [member]
Disclosure of changes in share capital [Line Items]
Percentage of shareholding stake in acquired company									32.60%
Exceeded percentage of voting right due to the execution of Share Buyback program										32.60%
Shares brought back due to Buyback program										€ 400,000,000
Aegon [member]
Disclosure of changes in share capital [Line Items]
Share buyback program, number of common shares repurchased										83,116,535
Shares brought back due to Buyback program										€ 400,000,000
Common Share [member]
Disclosure of changes in share capital [Line Items]
Nominal value of issued shares									€ 0.12
Common Share B [member]
Disclosure of changes in share capital [Line Items]
Nominal value of issued shares									€ 0.12
Common shares B [member] | Vereniging Aegon [member]
Disclosure of changes in share capital [Line Items]
Proportion of market value of common shares in capital	2.50%	2.50%	2.50%
Number of shares purchased on exercising options rights		13,042,612	1,979,260
Common shares B [member] | Vereniging Aegon [member]
Disclosure of changes in share capital [Line Items]
Shares repurchased value	€ 1,725,169.73			€ 1,968,332
Proportion of market value of common shares in capital					0.025%	0.025%	0.025%
Number of shares purchased on exercising options rights					760	3,686,000	9,680
Common shares B [member] | Aegon [member] | Vereniging Aegon [member]
Disclosure of changes in share capital [Line Items]
Share buyback program, number of common shares repurchased	13,042,592							17,324,960
Shares repurchased value	€ 1,725,169.73

Share Capital - Movement of Com

Share Capital - Movement of Common Shares (Detail) shares in Thousands, pure in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2017EUR (€)shares	Dec. 31, 2016EUR (€)shares
Disclosure of changes in share capital [Line Items]
Beginning balance | shares	66,105	44,532
Ending balance | shares	80,996	66,105
Beginning balance	€ (319)
Ending balance	€ (322)	€ (319)
Common shares [member]
Disclosure of changes in share capital [Line Items]
Beginning balance | shares	2,074,549	2,147,037
Dividend	21,099	10,629
Shares withdrawn | shares		(83,117)
Ending balance | shares	2,095,648	2,074,549
Beginning balance	€ 249	€ 258
Dividend	3	1
Shares withdrawn		(10)
Ending balance	€ 251	€ 249
Common share B [member]
Disclosure of changes in share capital [Line Items]
Beginning balance | shares	585,022	585,022
Ending balance | shares	585,022	585,022
Beginning balance	€ 70	€ 70
Ending balance	€ 70	€ 70

Share Capital - Disclosure of w

Share Capital - Disclosure of weighted average number of common shares and common shares B (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Common shares [member]
Disclosure of classes of share capital [Line Items]
Weighted average number of common shares	2,080,792	2,129,074
Common share B [member]
Disclosure of classes of share capital [Line Items]
Weighted average number of common shares	585,022	585,022

Shareholders' equity - Summa379

Shareholders' equity - Summary of Shareholders' Equity (Detail) - EUR (€) € in Millions, shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of shareholders equity [Line Items]
Beginning balance	€ 24,341	€ 26,250	€ 27,683
Owners of Aegon N.V.	2,469	437	(432)
Other comprehensive income / (loss)	(2,038)	(1,301)	(380)
Shares issued	3	1	1
Dividend withholding tax reduction	2	(2)	1
Ending balance	24,102	24,341	26,250
Share capital [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	8,193	8,387	8,597
Shares issued	3	1	1
Ending balance	8,053	8,193	8,387
Revaluation account [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	5,381	6,471	8,308
Other comprehensive income / (loss)	(461)	(1,090)	(1,837)
Ending balance	4,920	5,381	6,471
Remeasurement of defined benefit Plans of group companies [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	(1,820)	(1,532)	(1,611)
Other comprehensive income / (loss)	151	(288)	79
Ending balance	(1,669)	(1,820)	(1,532)
Retained earnings [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	7,419	7,832	8,639
Other comprehensive income / (loss)	13	(2)	10
Dividend withholding tax reduction	2	(2)	1
Ending balance	9,374	7,419	7,832
Aegon N.V [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	20,520
Net income 2016	2,469
Owners of Aegon N.V.	2,469	437	(432)
Foreign currency translation differences and movement in foreign investment hedging reserves	(1,615)
Changes in revaluation subsidiaries	(461)
Remeasurement of defined benefit plans of group companies	49
Transfer to legal reserve	(20)
Other	12
Other comprehensive income / (loss)	(2,035)
Shares issued	3
Dividend common shares	(438)
Dividend withholding tax reduction	2
Treasury shares	(106)
Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax	(131)
Repurchased and sold own shares	4
Ending balance	20,288	20,520
Aegon N.V [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	20,520	22,440
Net income 2016		437
Owners of Aegon N.V.		437
Foreign currency translation differences and movement in foreign investment hedging reserves		68
Changes in revaluation subsidiaries		(1,090)
Remeasurement of defined benefit plans of group companies		(304)
Transfer to legal reserve		13
Other		(2)
Other comprehensive income / (loss)		(1,316)
Shares issued		€ 1
Shares withdrawn		(382)
Dividend common shares		€ (490)
Dividend withholding tax reduction		(2)
Treasury shares		(27)
Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax		(133)
Repurchased and sold own shares		(9)
Ending balance		20,520	22,440
Aegon N.V [member] | Share capital [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	319
Shares issued	3
Ending balance	322	319
Aegon N.V [member] | Share capital [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	319	328
Shares issued		€ 1
Shares withdrawn		(10)
Ending balance		€ 319	328
Aegon N.V [member] | Paid-in surplus [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	7,873
Dividend common shares	(142)
Ending balance	7,731	7,873
Aegon N.V [member] | Paid-in surplus [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	7,873	8,059
Dividend common shares		(186)
Ending balance		7,873	8,059
Aegon N.V [member] | Revaluation account [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	5,450
Changes in revaluation subsidiaries	(461)
Transfer to legal reserve	28
Other comprehensive income / (loss)	(433)
Ending balance	5,017	5,450
Aegon N.V [member] | Revaluation account [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	5,450	6,551
Changes in revaluation subsidiaries		(1,090)
Transfer to legal reserve		(11)
Other comprehensive income / (loss)		(1,101)
Ending balance		5,450	6,551
Aegon N.V [member] | Remeasurement of defined benefit Plans of group companies [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	(1,820)
Foreign currency translation differences and movement in foreign investment hedging reserves	102
Remeasurement of defined benefit plans of group companies	49
Other comprehensive income / (loss)	151
Ending balance	(1,669)	(1,820)
Aegon N.V [member] | Remeasurement of defined benefit Plans of group companies [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	(1,820)	(1,532)
Foreign currency translation differences and movement in foreign investment hedging reserves		16
Remeasurement of defined benefit plans of group companies		(304)
Other comprehensive income / (loss)		(288)
Ending balance		(1,820)	(1,532)
Aegon N.V [member] | Legal reserve FCTR [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	1,316
Foreign currency translation differences and movement in foreign investment hedging reserves	(1,717)
Other comprehensive income / (loss)	(1,717)
Ending balance	(401)	1,316
Aegon N.V [member] | Legal reserve FCTR [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	1,316	1,264
Foreign currency translation differences and movement in foreign investment hedging reserves		52
Other comprehensive income / (loss)		52
Ending balance		1,316	1,264
Aegon N.V [member] | Legal reserve group companies [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	1,169
Transfer to legal reserve	(47)
Other comprehensive income / (loss)	(47)
Ending balance	1,122	1,169
Aegon N.V [member] | Legal reserve group companies [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	1,169	1,048
Transfer to legal reserve		121
Other comprehensive income / (loss)		121
Ending balance		1,169	1,048
Aegon N.V [member] | Retained earnings [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	5,966
Net income 2016 retained	437
Owners of Aegon N.V.	437
Transfer to legal reserve	(1)
Other	12
Other comprehensive income / (loss)	11
Dividend common shares	(296)
Dividend withholding tax reduction	2
Treasury shares	30
Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax	(131)
Repurchased and sold own shares	4
Ending balance	6,022	5,966
Aegon N.V [member] | Retained earnings [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	5,966	7,423
Net income 2015 retained		(432)
Owners of Aegon N.V.		(432)
Transfer to legal reserve		(97)
Other		(2)
Other comprehensive income / (loss)		€ (99)
Shares withdrawn		(372)
Dividend common shares		€ (304)
Dividend withholding tax reduction		(2)
Treasury shares		(106)
Coupons and premium on convertible core capital securities and coupon on perpetual securities, net of tax		(133)
Repurchased and sold own shares		(9)
Ending balance		5,966	7,423
Aegon N.V [member] | Treasury shares [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	(190)
Treasury shares	(136)
Ending balance	(325)	(190)
Aegon N.V [member] | Treasury shares [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	(190)	(269)
Treasury shares		79
Ending balance		(190)	(269)
Aegon N.V [member] | Net income /(loss) [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	437
Net income 2016 retained	(437)
Net income 2016	2,469
Owners of Aegon N.V.	2,032
Ending balance	2,469	437
Aegon N.V [member] | Net income /(loss) [member] | Common Share B [member]
Disclosure of shareholders equity [Line Items]
Beginning balance	€ 437	(432)
Net income 2015 retained		432
Net income 2016		437
Owners of Aegon N.V.		869
Ending balance		€ 437	€ (432)

Shareholders' equity - Summa380

Shareholders' equity - Summary of Movement of Number of Treasury Common Shares (Detail) - EUR (€) shares in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of treasury shares [Line Items]
At January 1	€ 190	€ 269
At December 31	€ 325	€ 190	€ 269
Common Share B [member]
Disclosure of treasury shares [Line Items]
At January 1	17,325
At December 31	15,346	17,325
Common Share B [member] | Purchase transactions average price 0.11 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		17,325
Common Share B [member] | Sale transactions price average 0.11 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(1,979)
Common Share B [member] | Sale transactions price average zero point one one one [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(13,043)
Common Share B [member] | Purchase transactions average price 0.13 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	13,043
Aegon N. V. and subsidiaries [member]
Disclosure of treasury shares [Line Items]
At January 1	47,473	42,998	49,537
At December 31	64,488	47,473	42,998
At January 1	€ 178	€ 257	€ 306
At December 31	€ 314	€ 178	€ 257
Aegon N. V. and subsidiaries [member] | Sale transactions price average 3.44 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(4,085)
Sale: transactions, price average, Amount	€ 14
Aegon N. V. and subsidiaries [member] | Sale transactions price average 3.68 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(26,916)
Sale: transactions, price average, Amount	€ 99
Aegon N. V. and subsidiaries [member] | Sale transactions price average 3.77 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(3,849)
Sale: transactions, price average, Amount	€ 14
Aegon N. V. and subsidiaries [member] | Sale: transactions, price average EUR 6.49 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(6,153)
Sale: transactions, price average, Amount		€ 40
Aegon N. V. and subsidiaries [member] | Sale: 1 transaction, price EUR 6.38 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(20,137)
Sale: transactions, price average, Amount		€ 129
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 3.51 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		29,259
Purchase: transactions, average price, Amount		€ 103
Aegon N. V. and subsidiaries [member] | Sale: 1 transaction, price EUR 5.11 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(29,259)
Sale: transactions, price average, Amount		€ 150
Aegon N. V. and subsidiaries [member] | Shares withdrawn: 1 transaction, price EUR 4.60 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(83,117)
Shares withdrawn: 1 transaction, price EUR 4.60		€ 382
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 3.84 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		30,765
Purchase: transactions, average price, Amount		€ 118
Aegon N. V. and subsidiaries [member] | Purchase transactions average price 5.09 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	51,865
Purchase: transactions, average price, Amount	€ 263
Aegon N. V. and subsidiaries [member] | Purchase: transactions, average price EUR 4.81 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		83,117
Purchase: transactions, average price, Amount		€ 400
Aegon N. V. and subsidiaries [member] | Common Share [member]
Disclosure of treasury shares [Line Items]
At January 1	47,473	42,998
At December 31	64,488	47,473	42,998
At January 1	€ 178	€ 257
At December 31	€ 314	178	€ 257
Aegon N. V. and subsidiaries [member] | Common Share [member] | Sale transactions price average 3.44 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(4,085)
Sale: transactions, price average, Amount	€ (14)
Aegon N. V. and subsidiaries [member] | Common Share [member] | Sale transactions price average 3.68 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(26,916)
Sale: transactions, price average, Amount	€ (99)
Aegon N. V. and subsidiaries [member] | Common Share [member] | Sale transactions price average 3.77 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	(3,849)
Sale: transactions, price average, Amount	€ (14)
Aegon N. V. and subsidiaries [member] | Common Share [member] | Purchase transactions average price three five point zero nine [member]
Disclosure of treasury shares [Line Items]
Purchase: transactions, average price, Amount	€ 263
Aegon N. V. and subsidiaries [member] | Common Share [member] | Purchase transactions average price 0.11 [member]
Disclosure of treasury shares [Line Items]
Purchase: transactions, average price, Amount		€ 400
Aegon N. V. and subsidiaries [member] | Common Share [member] | Sale: transactions, price average EUR 6.49 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(6,153)
Sale: transactions, price average, Amount		€ (40)
Aegon N. V. and subsidiaries [member] | Common Share [member] | Sale: 1 transaction, price EUR 6.38 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(20,137)
Sale: transactions, price average, Amount		€ (129)
Aegon N. V. and subsidiaries [member] | Common Share [member] | Purchase: transactions, average price EUR 3.51 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		29,259
Purchase: transactions, average price, Amount		€ 103
Aegon N. V. and subsidiaries [member] | Common Share [member] | Sale: 1 transaction, price EUR 5.11 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(29,259)
Sale: transactions, price average, Amount		€ (150)
Aegon N. V. and subsidiaries [member] | Common Share [member] | Shares withdrawn: 1 transaction, price EUR 4.60 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		(83,117)
Shares withdrawn: 1 transaction, price EUR 4.60		€ (382)
Aegon N. V. and subsidiaries [member] | Common Share [member] | Purchase: transactions, average price EUR 3.84 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		30,765
Purchase: transactions, average price, Amount		€ 118
Aegon N. V. and subsidiaries [member] | Common Share [member] | Purchase transactions average price 5.09 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares	51,865
Aegon N. V. and subsidiaries [member] | Common Share [member] | Purchase: transactions, average price EUR 4.81 [member]
Disclosure of treasury shares [Line Items]
Purchase/ sale: transactions, average price, Number of shares		83,117
Aegon N. V. and subsidiaries [member] | Common Share B [member]
Disclosure of treasury shares [Line Items]
At January 1	€ 2
At December 31	2	€ 2
Aegon N. V. and subsidiaries [member] | Common Share B [member] | Purchase transactions average price 0.11 [member]
Disclosure of treasury shares [Line Items]
Purchase: transactions, average price, Amount		€ 2
Aegon N. V. and subsidiaries [member] | Common Share B [member] | Sale transactions price average zero point one one one [member]
Disclosure of treasury shares [Line Items]
Sale: transactions, price average, Amount	(1)
Aegon N. V. and subsidiaries [member] | Common Share B [member] | Purchase transactions average price 0.13 [member]
Disclosure of treasury shares [Line Items]
Purchase: transactions, average price, Amount	€ 2

Shareholder's equity - Summary

Shareholder's equity - Summary of Treasury Stock (Detail) - EUR (€) shares in Thousands, € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of treasury shares [Line Items]
Total amount	€ 325	€ 190	€ 269
Common shares B [member]
Disclosure of treasury shares [Line Items]
Number of shares	15,346	17,325
Total amount	€ 2	€ 2
Aegon N.V [member]
Disclosure of treasury shares [Line Items]
Number of shares	80,996,000	66,105,000
Total amount	€ 325	€ 190
Aegon N.V [member] | Common shares [member] | Aegon N V [member]
Disclosure of treasury shares [Line Items]
Number of shares	64,488,000	47,473,000
Total amount	€ 314	€ 178
Aegon N.V [member] | Common shares [member] | Subsidiaries [member]
Disclosure of treasury shares [Line Items]
Number of shares	1,163,000	1,307,000
Total amount	€ 9	€ 10
Aegon N.V [member] | Common shares B [member] | Aegon N V [member]
Disclosure of treasury shares [Line Items]
Number of shares	15,346,000	17,325,000
Total amount	€ 2	€ 2

Other Equity Instruments - Sche

Other Equity Instruments - Schedule of Number and Weighted Average Exercise Prices of Other Equity Instruments (Detail) pure in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	3,797	3,800	3,827
Shares granted / Share options cost incurred	26	13	26
Shares vested / Share options forfeited	(30)	(16)	(53)
Ending balance	3,794	3,797	3,800
Junior perpetual capital securities [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	3,008	3,008	3,008
Ending balance	3,008	3,008	3,008
Perpetual cumulative subordinated bonds [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	454	454	454
Ending balance	454	454	454
Share options and incentive plans [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	65	68	94
Shares granted / Share options cost incurred	26	13	26
Shares vested / Share options forfeited	(30)	(16)	(53)
Ending balance	61	65	68
Non-cumulative subordinated notes [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Beginning balance	271	271	271
Ending balance	271	271	271

Other Equity Instruments - S383

Other Equity Instruments - Summary of Coupon Details - Junior Perpetual Capital Securities (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other equity instruments [Line Items]
Borrowings	€ 13,635	€ 13,153
Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 3,008	€ 3,008
USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	6.50%	6.50%
Borrowings currency	USD	USD
Coupon date, as of	Quarterly, December 15	Quarterly, December 15
Year of next call	2,018	2,018
USD 500 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 424	€ 424
USD 250 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	floating LIBOR rate	floating LIBOR rate
Borrowings currency	USD	USD
Coupon date, as of	Quarterly, December 15	Quarterly, December 15
Year of next call	2,018	2,018
USD 250 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 212	€ 212
USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	floating CMS rate	floating CMS rate
Borrowings currency	USD	USD
Coupon date, as of	Quarterly, July 15	Quarterly, July 15
Year of next call	2,018	2,018
USD 500 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 402	€ 402
USD 1 billion [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	6.375%	6.375%
Borrowings currency	USD	USD
Coupon date, as of	Quarterly, June 15	Quarterly, July 15
Year of next call	2,018	2,018
USD 1 billion [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 821	€ 821
EUR 950 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	floating DSL rate	floating DSL rate
Borrowings currency	EUR	EUR
Coupon date, as of	Quarterly, July 15	Quarterly, July 15
Year of next call	2,018	2,018
EUR 950 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 950	€ 950
EUR 200 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	6.00%	6.00%
Borrowings currency	EUR	EUR
Coupon date, as of	Annually, July 21	Annually, July 21
Year of next call	2,018	2,018
EUR 200 million [member] | Junior perpetual capital securities [member]
Disclosure of other equity instruments [Line Items]
Borrowings	€ 200	€ 200

Other Equity Instruments - S384

Other Equity Instruments - Summary of Coupon Details - Junior Perpetual Capital Securities (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)
Aegon N.V [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Basis point interest rate	6.625%	6.625%
USD 500 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 500,000,000
USD 250 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 250,000,000	€ 250,000,000
Basis point	0.875%	0.875%
Basis point interest rate	4.00%	4.00%
Basis point description	The coupon of the USD 250 million junior perpetual capital securities is reset each quarter based on the then prevailing three-month LIBOR yield plus a spread of 87.5 basis points, with a minimum of 4%.
USD 250 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 250,000,000
USD 500 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 500,000,000	€ 500,000,000
Basis point	0.10%	0.10%
Basis point description	The coupon of the USD 500 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year US dollar interest rate swap yield plus a spread of ten basis points, with a maximum of 8.5%.
USD 500 million [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Basis point interest rate	8.50%	8.50%
USD 500 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 500,000,000
USD 1 billion [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Principal amount	1,000,000
EUR 950 million [member]
Disclosure of other equity instruments [Line Items]
Principal amount	$ 950,000,000	€ 950,000,000
Basis point	0.10%	0.10%
Basis point description	The coupon of the EUR 950 million junior perpetual capital securities is reset each quarter based on the then prevailing ten-year Dutch government bond yield plus a spread of ten basis points, with a maximum of 8%.
EUR 950 million [member] | Top of range [member]
Disclosure of other equity instruments [Line Items]
Basis point interest rate	8.00%	8.00%
EUR 950 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Principal amount | €		€ 950,000,000
EUR 200 million [member] | Aegon N.V [member]
Disclosure of other equity instruments [Line Items]
Principal amount | €		€ 200,000,000

Other Equity Instruments - S385

Other Equity Instruments - Summary of Coupon Details - Non-cumulative Subordinated Notes (Detail) € in Millions	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of other equity instruments [Line Items]
Borrowings		€ 13,635	€ 13,153
USD 525 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	8.00%	8.00%
Coupon date, as of	Quarterly, February 15
Year of next call	2,018
Borrowings		€ 271	271	€ 271
Principal amount | $	$ 525,000,000
Non-cumulative subordinated notes [member]
Disclosure of other equity instruments [Line Items]
Borrowings		€ 3,008	3,008	€ 3,008
Non-cumulative subordinated notes [member] | Aegon N.V [member] | USD 525 million [member]
Disclosure of other equity instruments [Line Items]
Coupon rate	8.00%	8.00%
Coupon date, as of	Quarterly, February 15
Year of next call	2,018
Borrowings		€ 271	€ 271
Principal amount | $	$ 525,000,000

Long-term Borrowings - Summary

Long-term Borrowings - Summary of Long-term Borrowings (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of long-term borrowings [Line Items]
Long-term borrowings	€ 11,943	€ 11,251
Aegon N.V [member]
Disclosure of long-term borrowings [Line Items]
Long-term borrowings	1,801	1,832
Aegon N.V [member] | Not later than 1 year [member]
Disclosure of long-term borrowings [Line Items]
Long-term borrowings	500	500
Aegon N.V [member] | 1-5 years [member]
Disclosure of long-term borrowings [Line Items]
Long-term borrowings	82	84
Aegon N.V [member] | Over 10 years [member]
Disclosure of long-term borrowings [Line Items]
Long-term borrowings	€ 1,219	€ 1,248

Long-term Borrowings - Addition

Long-term Borrowings - Additional Information (Detail) - Aegon N.V [member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of long-term borrowings [Line Items]
Long-term borrowing, market value	$ 2,198	$ 2,221
Bottom of range [member]
Disclosure of long-term borrowings [Line Items]
Borrowing maturity	Within one year
Long-term borrowing, interest rate	0.00%
Top of range [member]
Disclosure of long-term borrowings [Line Items]
Borrowing maturity	22 years
Long-term borrowing, interest rate	6.625%

Other Liabilities - Additional

Other Liabilities - Additional Information (Detail) - Aegon N.V [member] - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of other liabilities [Line Items]
Loans and payable maturity description	Loans from and payables to group companies have a maturity of less than one year.
Derivatives fair value	€ 97	€ 233

Number of Employees - Additiona

Number of Employees - Additional Information (Detail)	Dec. 31, 2017Employees	Dec. 31, 2016Employees	Dec. 31, 2015Employees
Disclosure of number of employees [line items]
Number of employees employed	28,318	29,380	31,530
Aegon N.V [member]
Disclosure of number of employees [line items]
Number of employees employed	0	0

Auditor's Remuneration - Summar

Auditor's Remuneration - Summary of Accountants Remuneration (Detail) - Aegon N.V [member] - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Auditors remuneration [Line Items]
Audit fees	€ 42	€ 27
Audit-related fees	3	3
Total	46	30
Pricewater-houseCoopers Accountants N.V. (NL) [Member]
Auditors remuneration [Line Items]
Audit fees	13	9
Audit-related fees	1	1
Total	€ 14	€ 10

Proposal for Profit Appropri391

Proposal for Profit Appropriation - Additional Information (Detail) - € / shares	May 18, 2018	Dec. 31, 2017
Common shares [member]
Disclosure of proposal profit appropriation [Line Items]
Par value per share		€ 0.12
Common share B [member]
Disclosure of proposal profit appropriation [Line Items]
Par value per share		0.12
Aegon N.V [member] | Common shares [member]
Disclosure of proposal profit appropriation [Line Items]
Par value per share		€ 0.12
Dividend Distributed [Member] | Aegon N.V [member] | Common shares [member]
Disclosure of proposal profit appropriation [Line Items]
Dividends proposed as distributions to owners per share	€ 0.14
Dividend Distributed [Member] | Aegon N.V [member] | Common share B [member]
Disclosure of proposal profit appropriation [Line Items]
Dividends proposed as distributions to owners per share	€ 0.0035

Proposal for Profit Appropri392

Proposal for Profit Appropriation - Summary of Proposal for Profit Appropriation (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of proposal profit appropriation [Line Items]
Owners of Aegon N.V.	€ 2,469	€ 437	€ (432)
Aegon N.V [member]
Disclosure of proposal profit appropriation [Line Items]
Final dividend on common shares	286	265
Earnings to be retained	2,183	172
Owners of Aegon N.V.	€ 2,469	€ 437	€ (432)

Summary of Investments Other393

Summary of Investments Other than Investments in Related Parties (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of investments [Line Items]
Available-for-sale	€ 88,170	€ 109,860
Fair value through profit or loss	7,119	5,142
Financial assets	134,658	154,304
Investments in real estate	2,147	€ 1,999	€ 1,990
Cost [member] | Shares [member]
Disclosure of investments [Line Items]
Available-for-sale	436
Fair value through profit or loss	1,021
Cost [member] | Bonds [member]
Disclosure of investments [Line Items]
Fair value through profit or loss	4,150
Financial assets	39,368
Other investments at fair value through profit or loss	1,898
Cost [member] | Bonds [member] | Financial assets available-for-sale and held-to-maturity investments, category [member]
Disclosure of investments [Line Items]
Financial assets	81,130
Cost [member] | Bonds [member] | Asset backed [member]
Disclosure of investments [Line Items]
Financial assets	4,624
Cost [member] | Bonds [member] | US government [member]
Disclosure of investments [Line Items]
Financial assets	8,011
Cost [member] | Bonds [member] | Dutch government [member]
Disclosure of investments [Line Items]
Financial assets	4,799
Cost [member] | Bonds [member] | Other government [member]
Disclosure of investments [Line Items]
Financial assets	11,746
Cost [member] | Bonds [member] | Mortgage backed [member]
Disclosure of investments [Line Items]
Financial assets	7,326
Cost [member] | Bonds [member] | Corporate bonds [member]
Disclosure of investments [Line Items]
Financial assets	37,168
Cost [member] | Bonds [member] | Money market investments [member]
Disclosure of investments [Line Items]
Financial assets	6,690
Cost [member] | Bonds [member] | Other [member]
Disclosure of investments [Line Items]
Financial assets	765
Cost [member] | Bonds [member] | Mortgage loans - held at amortized cost [member]
Disclosure of investments [Line Items]
Financial assets	33,562
Cost [member] | Bonds [member] | Private loans - held at amortized cost [member]
Disclosure of investments [Line Items]
Financial assets	3,642
Cost [member] | Bonds [member] | Deposits with financial institutions [member]
Disclosure of investments [Line Items]
Financial assets	139
Cost [member] | Bonds [member] | Policy loans [member]
Disclosure of investments [Line Items]
Financial assets	1,897
Cost [member] | Bonds [member] | Other [member]
Disclosure of investments [Line Items]
Financial assets	127
Fair value [member]
Disclosure of investments [Line Items]
Financial assets	141,858
Fair value [member] | Shares [member]
Disclosure of investments [Line Items]
Available-for-sale	490
Fair value through profit or loss	1,062
Fair value [member] | Bonds [member]
Disclosure of investments [Line Items]
Fair value through profit or loss	4,144
Financial assets	44,422
Other investments at fair value through profit or loss	1,914
Fair value [member] | Bonds [member] | Financial assets available-for-sale and held-to-maturity investments, category [member]
Disclosure of investments [Line Items]
Financial assets	87,681
Fair value [member] | Bonds [member] | Asset backed [member]
Disclosure of investments [Line Items]
Financial assets	4,698
Fair value [member] | Bonds [member] | US government [member]
Disclosure of investments [Line Items]
Financial assets	8,846
Fair value [member] | Bonds [member] | Dutch government [member]
Disclosure of investments [Line Items]
Financial assets	5,781
Fair value [member] | Bonds [member] | Other government [member]
Disclosure of investments [Line Items]
Financial assets	12,568
Fair value [member] | Bonds [member] | Mortgage backed [member]
Disclosure of investments [Line Items]
Financial assets	7,694
Fair value [member] | Bonds [member] | Corporate bonds [member]
Disclosure of investments [Line Items]
Financial assets	40,613
Fair value [member] | Bonds [member] | Money market investments [member]
Disclosure of investments [Line Items]
Financial assets	6,690
Fair value [member] | Bonds [member] | Other [member]
Disclosure of investments [Line Items]
Financial assets	791
Fair value [member] | Bonds [member] | Mortgage loans - held at amortized cost [member]
Disclosure of investments [Line Items]
Financial assets	38,076
Fair value [member] | Bonds [member] | Private loans - held at amortized cost [member]
Disclosure of investments [Line Items]
Financial assets	4,181
Fair value [member] | Bonds [member] | Deposits with financial institutions [member]
Disclosure of investments [Line Items]
Financial assets	139
Fair value [member] | Bonds [member] | Policy loans [member]
Disclosure of investments [Line Items]
Financial assets	1,897
Fair value [member] | Bonds [member] | Other [member]
Disclosure of investments [Line Items]
Financial assets	127
Fair value [member] | Real estate [member]
Disclosure of investments [Line Items]
Investments in real estate	2,147
Book value [member]
Disclosure of investments [Line Items]
Financial assets	136,804
Book value [member] | Shares [member]
Disclosure of investments [Line Items]
Available-for-sale	490
Fair value through profit or loss	1,062
Book value [member] | Bonds [member]
Disclosure of investments [Line Items]
Fair value through profit or loss	4,144
Financial assets	39,368
Other investments at fair value through profit or loss	1,914
Book value [member] | Bonds [member] | Financial assets available-for-sale and held-to-maturity investments, category [member]
Disclosure of investments [Line Items]
Financial assets	87,681
Book value [member] | Bonds [member] | Asset backed [member]
Disclosure of investments [Line Items]
Financial assets	4,698
Book value [member] | Bonds [member] | US government [member]
Disclosure of investments [Line Items]
Financial assets	8,846
Book value [member] | Bonds [member] | Dutch government [member]
Disclosure of investments [Line Items]
Financial assets	5,781
Book value [member] | Bonds [member] | Other government [member]
Disclosure of investments [Line Items]
Financial assets	12,568
Book value [member] | Bonds [member] | Mortgage backed [member]
Disclosure of investments [Line Items]
Financial assets	7,694
Book value [member] | Bonds [member] | Corporate bonds [member]
Disclosure of investments [Line Items]
Financial assets	40,613
Book value [member] | Bonds [member] | Money market investments [member]
Disclosure of investments [Line Items]
Financial assets	6,690
Book value [member] | Bonds [member] | Other [member]
Disclosure of investments [Line Items]
Financial assets	791
Book value [member] | Bonds [member] | Mortgage loans - held at amortized cost [member]
Disclosure of investments [Line Items]
Financial assets	33,562
Book value [member] | Bonds [member] | Private loans - held at amortized cost [member]
Disclosure of investments [Line Items]
Financial assets	3,642
Book value [member] | Bonds [member] | Deposits with financial institutions [member]
Disclosure of investments [Line Items]
Financial assets	139
Book value [member] | Bonds [member] | Policy loans [member]
Disclosure of investments [Line Items]
Financial assets	1,897
Book value [member] | Bonds [member] | Other [member]
Disclosure of investments [Line Items]
Financial assets	127
Book value [member] | Real estate [member]
Disclosure of investments [Line Items]
Investments in real estate	€ 2,147

Statement of Financial Position

Statement of Financial Position of Aegon N.V. (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivables
Cash and cash equivalents	€ 10,768	€ 11,347	€ 9,594
Assets	395,923	425,425
Shareholders' equity
Share capital	322	319	328
Revaluation account	4,920	5,381
Remeasurement of defined benefit plans of group companies	(1,669)	(1,820)
Group equity	24,102	24,341	26,250	€ 27,683
Long-term borrowings	11,943	11,251
Deferred tax liability	1,029	2,201
Other	15,208	16,978
Total liabilities	371,821	401,084
Total equity and liabilities	395,923	425,425
Aegon N.V [member]
Non-current assets
Shares in group companies	23,117	22,219	€ 23,992
Loans to group companies	2,690	4,123
Financial fixed assets	25,807	26,342
Receivables
Receivables from group companies	36	80
Other receivables	146	219
Other	74	140
Accrued interest and rent	8	15
Receivables	264	454
Cash and cash equivalents	1,068	879
Assets	27,139	27,675
Shareholders' equity
Share capital	322	319
Paid-in surplus	7,731	7,873
Revaluation account	5,017	5,450
Remeasurement of defined benefit plans of group companies	(1,669)	(1,820)
Legal reserves - foreign currency translation reserve	(401)	1,316
Legal reserves in respect of group companies	1,122	1,169
Retained earnings, including treasury shares	5,696	5,776
Net income / (loss)	2,469	437
Group equity	20,288	20,520
Other equity instruments	3,794	3,797
Total equity	24,082	24,318
Subordinated borrowings	764	767
Long-term borrowings	1,801	1,832
Non-current liabilities	2,565	2,599
Short term deposits	73	128
Loans from group companies	62	62
Payables to group companies	123	140
Deferred tax liability	89	159
Other	125	242
Accruals and deferred income	22	29
Other liabilities	494	760
Total liabilities	3,059	3,359
Total equity and liabilities	€ 27,139	€ 27,675

Income Statement of Aegon N.V.

Income Statement of Aegon N.V. (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of income statement [Line Items]
Net income / (loss)	€ 2,469	€ 438	€ (431)
Owners of Aegon N.V.	2,469	437	(432)
Aegon N.V [member]
Disclosure of income statement [Line Items]
Net income / (loss) group companies	2,511	533	(394)
Net income / (loss)	(42)	(96)	(38)
Owners of Aegon N.V.	€ 2,469	€ 437	€ (432)

Condensed cash flow statement o

Condensed cash flow statement of Aegon N.V. (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of cash flow statement [Line Items]
Income / (loss) before tax	€ (2,534)	€ (610)	€ 514
Net cash flows from operating activities	553	3,319	914
Net cash flows from investing activities	(1,196)	(1,078)	615
Issuance of treasury shares	2
Dividends paid	(294)	(306)	(292)
Net cash flows from financing activities	519	(465)	(2,785)
Aegon N V [member]
Disclosure of cash flow statement [Line Items]
Income / (loss) before tax	2,468	411	(454)
Adjustments	(3,676)	(231)	1,920
Net cash flows from operating activities	(1,208)	180	1,466
Dividends and capital repayments of subsidiaries, associates and joint ventures	700	895
Other	(1)	(2)	(5)
Net cash flows from investing activities	700	893	(5)
Issuance of treasury shares	2
Purchase of treasury shares	(266)	(623)	(213)
Dividends paid	(294)	(306)	(292)
Issuance, repurchase and coupons of perpetual securities	(138)	(140)	(148)
Issuance, repurchase and coupons of non-cumulative subordinated notes	(37)	(38)	(38)
Issuance and repurchase of borrowings	1,429	604	(1,115)
Net cash flows from financing activities	696	(503)	(1,806)
Net increase / (decrease) in cash and cash equivalents	€ 188	€ 570	€ (346)

Five-year Schedule of Maturitie

Five-year Schedule of Maturities of Debt (Detail) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of long-term borrowings [Line Items]
Subordinated borrowings	€ 764	€ 767
Long-term borrowings	11,943	11,251
Aegon N.V [member]
Disclosure of long-term borrowings [Line Items]
Subordinated borrowings	764	767
Long-term borrowings	1,801	1,832
Not later than 1 year [member] | Aegon N.V [member]
Disclosure of long-term borrowings [Line Items]
Long-term borrowings	500	500
12-24 months [member] | Aegon N.V [member]
Disclosure of long-term borrowings [Line Items]
Long-term borrowings	82
Later than two years and not later than three years [member] | Aegon N.V [member]
Disclosure of long-term borrowings [Line Items]
Long-term borrowings		84
Later than 5 years [member] | Aegon N.V [member]
Disclosure of long-term borrowings [Line Items]
Subordinated borrowings	764	767
Long-term borrowings	€ 1,219	€ 1,248

Condensed Financial Informat398

Condensed Financial Information of Registrant - Additional Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed financial information of registrant [Line Items]
Dividends	€ (118)	€ (196)
Aegon N.V [member]
Condensed financial information of registrant [Line Items]
Dividends	(120)	(181)
Business combinations [member] | Aegon N.V [member]
Condensed financial information of registrant [Line Items]
Dividends	1,800	1,100	€ 1,100
Capital contributions	€ 1,100	€ 200	€ 300

Disclosure of Supplementary Ins

Disclosure of Supplementary Insurance Information (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs	€ 9,729	€ 10,942	€ 10,530
Future policy benefits	306,311	326,964	327,841
Unearned premiums	5,447	5,822	5,202
Other policy claims and benefits	3,036	3,244	3,414
Premium revenue	22,826	23,453	22,925
Net investment income	7,338	7,788	8,525
Benefits, claims and losses	25,537	25,929	25,259
Amortization of deferred policy acquisition costs	770	837	1,055
Other operating expenses	5,155	5,513	5,543
Premiums written	19,395	20,277	19,946
Americas [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs	8,188	8,958	8,330
Future policy benefits	171,122	185,654	177,742
Unearned premiums	5,241	5,625	4,977
Other policy claims and benefits	1,982	2,151	1,991
Premium revenue	9,383	9,433	9,195
Net investment income	3,362	3,711	3,672
Benefits, claims and losses	8,585	8,913	8,240
Amortization of deferred policy acquisition costs	552	576	593
Other operating expenses	2,953	3,438	3,357
Premiums written	6,387	6,824	6,643
The Netherlands [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs	76	84	97
Future policy benefits	62,446	63,526	59,779
Unearned premiums	61	59	108
Other policy claims and benefits	932	977	1,316
Premium revenue	2,208	2,491	2,947
Net investment income	2,173	2,133	2,274
Benefits, claims and losses	4,430	3,726	4,641
Amortization of deferred policy acquisition costs	19	24	30
Other operating expenses	925	967	1,039
Premiums written	2,192	2,477	2,934
United Kingdom [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs	903	996	1,264
Future policy benefits	65,052	69,505	83,417
Unearned premiums	14	11	12
Other policy claims and benefits	6	6	5
Premium revenue	9,635	9,924	8,512
Net investment income	1,516	1,661	2,331
Benefits, claims and losses	11,796	12,618	11,541
Amortization of deferred policy acquisition costs	111	148	319
Other operating expenses	646	518	588
Premiums written	9,266	9,331	8,038
Central & Eastern Europe [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs	70	71	84
Future policy benefits	1,910	1,905	1,890
Unearned premiums	23	18	15
Other policy claims and benefits	86	75	70
Premium revenue	628	578	642
Net investment income	49	45	45
Benefits, claims and losses	416	395	563
Amortization of deferred policy acquisition costs	54	59	80
Other operating expenses	207	185	184
Premiums written	614	568	631
Spain & Portugal [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs	1	1	1
Future policy benefits	796	799	797
Other policy claims and benefits	15	12	10
Premium revenue	155	148	133
Net investment income	31	36	34
Benefits, claims and losses	153	143	151
Other operating expenses	93	90	74
Premiums written	150	143	128
Asia [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs	490	832	745
Future policy benefits	4,969	5,558	4,127
Unearned premiums	100	105	88
Other policy claims and benefits	15	22	20
Premium revenue	816	882	1,494
Net investment income	203	196	165
Benefits, claims and losses	153	130	119
Amortization of deferred policy acquisition costs	33	31	30
Other operating expenses	95	111	128
Premiums written	778	927	1,564
Holding and other activities [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Deferred policy acquisition costs			9
Future policy benefits	16	16	89
Unearned premiums	8	4	2
Other policy claims and benefits			1
Premium revenue	1	(2)	2
Net investment income	5	6	4
Benefits, claims and losses	5	3	2
Amortization of deferred policy acquisition costs			3
Other operating expenses	76	66	57
Premiums written	8	7	7
Asset management [member]
Disclosure of supplementary insurance information and deferred policy acquisition costs [Line Items]
Other operating expenses	€ 159	€ 138	€ 117

Summary of Reinsurance (Detail)

Summary of Reinsurance (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of reinsurance transactions [Line Items]
Gross amount	€ 21,174	€ 21,734	€ 21,302
Ceded to other companies	3,431	3,176	2,979
Assumed from other companies	1,653	1,719	1,623
Net amount	€ 19,395	€ 20,277	€ 19,946
% of amount assumed to net	9.00%	8.00%	8.00%
Life insurance in force [member]
Disclosure of reinsurance transactions [Line Items]
Gross amount	€ 863,686	€ 986,854	€ 1,008,787
Ceded to other companies	709,326	851,003	961,485
Assumed from other companies	525,201	648,147	658,594
Net amount	€ 679,561	€ 783,999	€ 705,896
% of amount assumed to net	77.00%	83.00%	93.00%
Life insurance [member]
Disclosure of reinsurance transactions [Line Items]
Gross amount	€ 18,324	€ 18,687	€ 17,971
Ceded to other companies	3,214	2,932	2,694
Assumed from other companies	1,628	1,713	1,612
Net amount	€ 16,738	€ 17,468	€ 16,889
% of amount assumed to net	10.00%	10.00%	10.00%
Non-life insurance [member]
Disclosure of reinsurance transactions [Line Items]
Gross amount	€ 2,849	€ 3,046	€ 3,332
Ceded to other companies	217	244	286
Assumed from other companies	25	7	11
Net amount	€ 2,657	€ 2,808	€ 3,057
% of amount assumed to net	1.00%	0.00%	0.00%

Valuation and Qualifying Acc401

Valuation and Qualifying Accounts (Detail) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of details of valuation and qualifying accounts [line items]
Beginning balance	€ 215	€ 249	€ 363
Addition charged to earnings	40	5	30
Amounts written off and other changes	(37)	(40)	(152)
Currency translation	(5)	1	8
Ending balance	213	215	249
Mortgages [member]
Disclosure of details of valuation and qualifying accounts [line items]
Beginning balance	40	56
Ending balance	48	40	56
Other loans [member]
Disclosure of details of valuation and qualifying accounts [line items]
Beginning balance	97	86
Ending balance	116	97	86
Receivables [member]
Disclosure of details of valuation and qualifying accounts [line items]
Beginning balance	79	107
Ending balance	€ 48	€ 79	€ 107