The Hartford Financial Services Group, Inc. (HIG) 10-Q 4 Nov 19 2019 Q3 Quarterly report Financial data

Cover page Document Information

Cover page Document Information	9 Months Ended
	Sep. 30, 2019
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity Shell Company	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false

Cover page Entity Addresses

Cover page Entity Addresses	9 Months Ended
	Sep. 30, 2019
Entity Addresses [Line Items]
Entity Address, Address Line One	One Hartford Plaza
Entity Address, City or Town	Hartford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06155
City Area Code	(860)
Local Phone Number	547-5000

Cover page Entities

Cover page Entities	9 Months Ended
	Sep. 30, 2019
Entity Information [Line Items]
Entity File Number	001-13958
Entity Registrant Name	THE HARTFORD FINANCIAL SERVICES GROUP, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3317783
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0000874766
Current Fiscal Year End Date	--12-31

Cover page Entity Listings

Cover page Entity Listings - $ / shares	9 Months Ended
	Sep. 30, 2019	Nov. 01, 2019
Entity Listings [Line Items]
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		360,421,232
Entity Listing, Par Value Per Share	$ 0.01
HIG [Member]
Entity Listings [Line Items]
Trading Symbol	HIG
HIG 41 [Member]
Entity Listings [Line Items]
Trading Symbol	HIG 41
HGH [Member]
Entity Listings [Line Items]
Trading Symbol	HGH
HIG PR G [Member]
Entity Listings [Line Items]
Trading Symbol	HIG PR G
Common Stock, par value $0.01 per share [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
6.10% Notes due October 1, 2041 [Member]
Entity Listings [Line Items]
Title of 12(b) Security	6.10% Notes due October 1, 2041
7.875% Fixed-to-Floating Rate Junior Subordinated Debentures due 2042 [Member]
Entity Listings [Line Items]
Title of 12(b) Security	7.875% Fixed-to-Floating Rate Junior Subordinated Debentures due 2042
Depositary Shares, Each Representing a 1/1,000th Interest in a Share of 6.000% Non-Cumulative Preferred Stock, Series G, par value $0.01 per share [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Depositary Shares, Each Representing a 1/1,000th Interest in a Share of 6.000% Non-Cumulative Preferred Stock, Series G, par value $0.01 per share

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Premiums Earned, Net	$ 4,394,000,000	$ 3,987,000,000	$ 12,500,000,000	$ 11,872,000,000
Fee income	330,000,000	344,000,000	970,000,000	994,000,000
Net investment income	490,000,000	444,000,000	1,448,000,000	1,323,000,000
Net realized capital gains (losses):
Total other-than-temporary impairment (OTTI) losses	(1,000,000)	(4,000,000)	(5,000,000)	(6,000,000)
OTTI losses recognized in other comprehensive income (“OCI”)	0	(3,000,000)	(2,000,000)	(5,000,000)
Net OTTI losses recognized in earnings	(1,000,000)	(1,000,000)	(3,000,000)	(1,000,000)
Other net realized capital gains	90,000,000	39,000,000	335,000,000	61,000,000
Total net realized capital gains	89,000,000	38,000,000	332,000,000	60,000,000
Other revenues	44,000,000	29,000,000	129,000,000	73,000,000
Total revenues	5,347,000,000	4,842,000,000	15,379,000,000	14,322,000,000
Benefits, losses and expenses
Benefits, losses and loss adjustment expenses	2,914,000,000	2,786,000,000	8,533,000,000	8,219,000,000
Amortization of deferred policy acquisition costs (DAC)	437,000,000	348,000,000	1,184,000,000	1,034,000,000
Insurance operating costs and other expenses	1,167,000,000	1,091,000,000	3,356,000,000	3,195,000,000
Loss on extinguishment of debt	(90,000,000)	0	(90,000,000)	(6,000,000)
Loss on reinsurance transaction	0	0	91,000,000	0
Interest expense	67,000,000	69,000,000	194,000,000	228,000,000
Amortization of other intangible assets	19,000,000	18,000,000	47,000,000	54,000,000
Total benefits, losses and expenses	4,694,000,000	4,312,000,000	13,495,000,000	12,736,000,000
Income from continuing operations, before tax	653,000,000	530,000,000	1,884,000,000	1,586,000,000
Income tax expense	118,000,000	103,000,000	347,000,000	297,000,000
Income from continuing operations, net of tax	535,000,000	427,000,000	1,537,000,000	1,289,000,000
Income from discontinued operations, net of tax	0	5,000,000	0	322,000,000
Net income	535,000,000	432,000,000	1,537,000,000	1,611,000,000
Preferred stock dividends	11,000,000	0	16,000,000	0
Net income available to common stockholders	$ 524,000,000	$ 432,000,000	$ 1,521,000,000	$ 1,611,000,000
EPS
Basic - Income from continuing ops, net of tax, available to common stockholders per common share	$ 1.45	$ 1.19	$ 4.21	$ 3.60
Diluted - Income from continuing ops, net of tax, available to common stockholders per common share	1.43	1.17	4.17	3.54
Basic - Net income available to common stockholders per common share	1.45	1.20	4.21	4.50
Diluted - Net income available to common stockholders per common share	$ 1.43	$ 1.19	$ 4.17	$ 4.42

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 535	$ 432	$ 1,537	$ 1,611
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in net unrealized gain on securities	401	(171)	1,744	(2,164)
Changes in OTTI losses recognized in other comprehensive income	0	1	(1)	1
Changes in net gain on cash flow hedging instruments	6	(5)	22	(37)
Changes in foreign currency translation adjustments	(4)	1	0	(4)
Changes in pension and other postretirement plan adjustments	9	10	26	29
OCI, net of tax	412	(166)	1,793	(2,177)
Comprehensive income (loss)	$ 947	$ 266	$ 3,330	$ (566)

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Investments:
Fixed maturities, available-for-sale, at fair value (amortized cost of $40,174 and $35,603)	$ 42,389	$ 35,652
Fixed maturities, at fair value using the fair value option	39	22
Equity securities, at fair value	1,414	1,214
Mortgage loans (net of allowances for loan losses of $0 and $1)	3,736	3,704
Limited partnerships and other alternative investments	1,770	1,723
Other investments	302	192
Short-term investments	2,927	4,283
Total investments	52,577	46,790
Cash	207	112
Restricted cash	83	9
Premiums receivable and agents’ balances, net	4,580	3,995
Reinsurance recoverables, net	5,333	4,357
Deferred policy acquisition costs	772	670
Deferred income taxes, net	376	1,248
Goodwill	1,913	1,290
Property and equipment, net	1,194	1,006
Other intangible assets, net	1,126	657
Other assets	2,095	2,173
Total assets	70,256	62,307
Liabilities
Unpaid losses and loss adjustment expenses	36,188	33,029
Reserve for future policy benefits	645	642
Other policyholder funds and benefits payable	764	767
Unearned premiums	6,820	5,282
Short-term debt	500	413
Long-term debt	4,346	4,265
Other liabilities	4,915	4,808
Total liabilities	54,178	49,206
Stockholders' Equity
Preferred stock, $0.01 par value — 50,000,000 shares authorized, 13,800 shares issued at September 30, 2019 and December 31, 2018, aggregate liquidation preference of $345	334	334
Common stock, $0.01 par value — 1,500,000,000 shares authorized, 384,923,222 shares issued at September 30, 2019 and December 31, 2018	4	4
Additional paid-in capital	4,302	4,378
Retained earnings	12,251	11,055
Treasury stock, at cost — 23,940,696 and 25,772,238 shares	(1,027)	(1,091)
Accumulated other comprehensive income (loss), net of tax	214	(1,579)
Total stockholders’ equity	16,078	13,101
Total liabilities and stockholders’ equity	$ 70,256	$ 62,307

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Fixed maturities, available-for-sale, at fair value (amortized cost of $40,174 and $35,603)	$ 40,174	$ 35,603
Mortgage loans (net of allowances for loan losses of $0 and $1)	$ 0	$ 1
Preferred stock, 13,800 shares issued	13,800,000	13,800,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock aggregate liquidation preference	$ 345	$ 345
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,500,000,000	1,500,000,000
Common stock 384,923,222 shares issued at March 31, 2019 and December 31, 2018	384,923,222	384,923,222
Treasury stock, at cost — 23,940,696 and 25,772,238 shares	23,940,696	25,772,238

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Millions	Total	Preferred Stock [Member]	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes, net of tax					$ 5		$ (5)
Adjusted balance, beginning of period					9,647		658
Beginning balance at Dec. 31, 2017				$ 4,379	9,642	$ (1,194)	663
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under incentive and stock compensation plans				(92)
Stock-based compensation plans expense				105
Issuance of shares for warrant exercise				(7)
Net income	$ 1,611				1,611
Dividends declared on preferred stock	0				0
Dividends declared on common stock					(285)
Treasury stock acquired						0
Issuance of shares under incentive and stock compensation plans						109
Net shares acquired related to employee incentive and stock compensation plans						(36)
Issuance of shares for warrant exercise						7
Total other comprehensive income (loss)							(2,177)
Ending balance at Sep. 30, 2018	$ 12,729	$ 0	$ 4	4,385	10,973	(1,114)	(1,519)
Preferred Shares Outstanding, beginning of period at Dec. 31, 2017		0
Preferred Shares Outstanding
Stock Issued During Period, Shares, New Issues		0
Preferred Shares Outstanding, end of period at Sep. 30, 2018		0
Common Shares Outstanding, beginning of period (in thousands) at Dec. 31, 2017			356,835
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Treasury stock acquired			0
Issuance of shares under incentive and stock compensation plans			2,373
Return of shares under incentive and stock compensation plans to treasury stock			(694)
Issuance of shares for warrant exercise			162
Common Shares Outstanding, at end of period at Sep. 30, 2018			358,676
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Cash dividends declared per common share	$ 0.80
Cash dividends declared per preferred share	$ 0
Cumulative effect of accounting changes, net of tax					0		0
Adjusted balance, beginning of period					10,649		(1,353)
Beginning balance at Jun. 30, 2018				4,374	10,649	(1,128)	(1,353)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under incentive and stock compensation plans				(9)
Stock-based compensation plans expense				22
Issuance of shares for warrant exercise				(2)
Net income	$ 432				432
Dividends declared on preferred stock	0				0
Dividends declared on common stock					(108)
Treasury stock acquired						0
Issuance of shares under incentive and stock compensation plans						14
Net shares acquired related to employee incentive and stock compensation plans						(2)
Issuance of shares for warrant exercise						2
Total other comprehensive income (loss)							(166)
Ending balance at Sep. 30, 2018	$ 12,729	$ 0	$ 4	4,385	10,973	(1,114)	(1,519)
Preferred Shares Outstanding, beginning of period at Jun. 30, 2018		0
Preferred Shares Outstanding
Stock Issued During Period, Shares, New Issues		0
Preferred Shares Outstanding, end of period at Sep. 30, 2018		0
Common Shares Outstanding, beginning of period (in thousands) at Jun. 30, 2018			358,359
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Treasury stock acquired			0
Issuance of shares under incentive and stock compensation plans			331
Return of shares under incentive and stock compensation plans to treasury stock			(57)
Issuance of shares for warrant exercise			43
Common Shares Outstanding, at end of period at Sep. 30, 2018			358,676
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Cash dividends declared per common share	$ 0.30
Cash dividends declared per preferred share	$ 0
Cumulative effect of accounting changes, net of tax					0		0
Adjusted balance, beginning of period					11,055		(1,579)
Beginning balance at Dec. 31, 2018	$ 13,101			4,378	11,055	(1,091)	(1,579)
Ending balance at Jun. 30, 2019				4,300	11,836	(984)	(198)
Preferred Shares Outstanding, beginning of period at Dec. 31, 2018		13,800
Preferred Shares Outstanding, end of period at Jun. 30, 2019		13,800
Common Shares Outstanding, beginning of period (in thousands) at Dec. 31, 2018			359,151
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Treasury stock acquired	(1,600)
Common Shares Outstanding, at end of period at Jun. 30, 2019			361,605
Beginning balance at Dec. 31, 2018	$ 13,101			4,378	11,055	(1,091)	(1,579)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under incentive and stock compensation plans				(91)
Stock-based compensation plans expense				95
Issuance of shares for warrant exercise				(80)
Net income	1,537				1,537
Dividends declared on preferred stock	(16)				(16)
Dividends declared on common stock					(325)
Treasury stock acquired						(90)
Issuance of shares under incentive and stock compensation plans						112
Net shares acquired related to employee incentive and stock compensation plans						(38)
Issuance of shares for warrant exercise						80
Total other comprehensive income (loss)							1,793
Ending balance at Sep. 30, 2019	$ 16,078	$ 334	$ 4	4,302	12,251	(1,027)	214
Preferred Shares Outstanding, beginning of period at Dec. 31, 2018		13,800
Preferred Shares Outstanding
Stock Issued During Period, Shares, New Issues		0
Preferred Shares Outstanding, end of period at Sep. 30, 2019		13,800
Common Shares Outstanding, beginning of period (in thousands) at Dec. 31, 2018			359,151
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Treasury stock acquired			(1,581)
Issuance of shares under incentive and stock compensation plans			2,447
Return of shares under incentive and stock compensation plans to treasury stock			(755)
Issuance of shares for warrant exercise			1,721
Common Shares Outstanding, at end of period at Sep. 30, 2019			360,983
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Cash dividends declared per common share	$ 0.90
Cash dividends declared per preferred share	$ 1,125,000,000
Cumulative effect of accounting changes, net of tax					0		0
Adjusted balance, beginning of period					11,836		(198)
Beginning balance at Jun. 30, 2019				4,300	11,836	(984)	(198)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under incentive and stock compensation plans				(17)
Stock-based compensation plans expense				19
Issuance of shares for warrant exercise				0
Net income	$ 535				535
Dividends declared on preferred stock	(11)				(11)
Dividends declared on common stock					(109)
Treasury stock acquired						(63)
Issuance of shares under incentive and stock compensation plans						27
Net shares acquired related to employee incentive and stock compensation plans						(7)
Issuance of shares for warrant exercise						0
Total other comprehensive income (loss)							412
Ending balance at Sep. 30, 2019	$ 16,078	$ 334	$ 4	$ 4,302	$ 12,251	$ (1,027)	$ 214
Preferred Shares Outstanding, beginning of period at Jun. 30, 2019		13,800
Preferred Shares Outstanding
Stock Issued During Period, Shares, New Issues		0
Preferred Shares Outstanding, end of period at Sep. 30, 2019		13,800
Common Shares Outstanding, beginning of period (in thousands) at Jun. 30, 2019			361,605
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Treasury stock acquired	(1,100)		(1,076)
Issuance of shares under incentive and stock compensation plans			588
Return of shares under incentive and stock compensation plans to treasury stock			(134)
Issuance of shares for warrant exercise			0
Common Shares Outstanding, at end of period at Sep. 30, 2019			360,983
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Cash dividends declared per common share	$ 0.30
Cash dividends declared per preferred share	$ 750

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net income	$ 1,537,000,000	$ 1,611,000,000
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Net realized capital gains	(332,000,000)	(7,000,000)
Amortization of deferred policy acquisition costs	1,184,000,000	1,092,000,000
Additions to deferred policy acquisition costs	(1,222,000,000)	(1,057,000,000)
Depreciation and amortization	333,000,000	359,000,000
Loss on extinguishment of debt	(90,000,000)	(6,000,000)
Gain on sale	0	(202,000,000)
Other operating activities, net	75,000,000	346,000,000
Change in assets and liabilities:
Decrease in reinsurance recoverables	115,000,000	111,000,000
Decrease (increase) in accrued and deferred income taxes	784,000,000	(74,000,000)
Increase (decrease) in insurance liabilities	630,000,000	(119,000,000)
Net change in other assets and other liabilities	(748,000,000)	(224,000,000)
Net cash provided by operating activities	2,446,000,000	1,842,000,000
Proceeds from the sale/maturity/prepayment of:
Fixed maturities, available-for-sale	14,335,000,000	20,069,000,000
Fixed maturities, fair value option	7,000,000	21,000,000
Equity securities, at fair value	1,260,000,000	1,171,000,000
Mortgage loans	491,000,000	314,000,000
Partnerships	201,000,000	377,000,000
Payments for the purchase of:
Fixed maturities, available-for-sale	(15,592,000,000)	(18,679,000,000)
Equity securities, at fair value	(847,000,000)	(1,084,000,000)
Mortgage loans	(515,000,000)	(667,000,000)
Partnerships	(218,000,000)	(408,000,000)
Net proceeds from (payments for) derivatives	60,000,000	(228,000,000)
Net additions of property and equipment	(75,000,000)	(70,000,000)
Net proceeds from (payments for) short-term investments	1,480,000,000	(2,689,000,000)
Other investing activities, net	(6,000,000)	(4,000,000)
Proceeds from business sold, net of cash transferred	0	1,115,000,000
Amount paid for business acquired, net of cash acquired	(1,901,000,000)	0
Net cash used for investing activities	(1,320,000,000)	(762,000,000)
Financing Activities
Deposits and other additions to investment and universal life-type contracts	107,000,000	1,814,000,000
Withdrawals and other deductions from investment and universal life-type contracts	(101,000,000)	(9,210,000,000)
Net transfers from separate accounts related to investment and universal life-type contracts	0	6,949,000,000
Repayments at maturity or settlement of consumer notes	0	(2,000,000)
Net decrease in securities loaned or sold under agreements to repurchase	(291,000,000)	(646,000,000)
Repayment of debt	(1,583,000,000)	(826,000,000)
Proceeds from the issuance of debt	1,376,000,000	490,000,000
Net issuance (return) of shares under incentive and stock compensation plans	(18,000,000)	10,000,000
Treasury stock acquired	(90,000,000)	0
Dividends paid on preferred stock	(16,000,000)	0
Dividends paid on common stock	(327,000,000)	(270,000,000)
Net cash used for financing activities	(943,000,000)	(1,691,000,000)
Foreign exchange rate effect on cash	(14,000,000)	(4,000,000)
Net increase (decrease) in cash, including cash classified as assets held for sale	169,000,000	(615,000,000)
Less: Net increase (decrease) in cash classified as assets held for sale	0	(537,000,000)
Net increase (decrease) in cash and restricted cash	169,000,000	(78,000,000)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	290,000,000	102,000,000
Supplemental Disclosure of Cash Flow Information
Income tax received (paid)	420,000,000	(1,000,000)
Interest paid	$ 210,000,000	$ 197,000,000

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies	1 . BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The Hartford Financial Services Group, Inc. is a holding company for insurance and financial services subsidiaries that provide property and casualty insurance, group life and disability products and mutual funds and exchange-traded products to individual and business customers (collectively, “The Hartford”, the “Company”, “we” or “our”). On May 23, 2019, the Company completed the previously announced acquisition of The Navigators Group, Inc. ("Navigators Group"), a global specialty underwriter, for $70 a share, or $2.137 billion in cash, including transaction expenses. For further discussion of this transaction, see Note 2 - Business Acquisition of Notes to Condensed Consolidated Financial Statements. On May 31, 2018, Hartford Holdings, Inc., a wholly owned subsidiary of the Company, completed the sale of the issued and outstanding equity of Hartford Life, Inc. (“HLI”), a holding company, for its life and annuity operating subsidiaries. For further discussion of this transaction, see Note 17 - Business Disposition and Discontinued Operations of Notes to Condensed Consolidated Financial Statements. The Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, which differ materially from the accounting practices prescribed by various insurance regulatory authorities. These Condensed Consolidated Financial Statements and Notes should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company's 2018 Form 10-K Annual Report. The results of operations for interim periods are not necessarily indicative of the results that may be expected for the full year. The accompanying Condensed Consolidated Financial Statements and Notes are unaudited. These financial statements reflect all adjustments (generally consisting only of normal accruals) which are, in the opinion of management, necessary for the fair presentation of the financial position, results of operations and cash flows for the interim periods. The Company's significant accounting policies are summarized in Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to Consolidated Financial Statements included in the Company's 2018 Form 10-K Annual Report. Consolidation The Condensed Consolidated Financial Statements include the accounts of The Hartford Financial Services Group, Inc., and entities in which the Company directly or indirectly has a controlling financial interest. Entities in which the Company has significant influence over the operating and financing decisions but does not control are reported using the equity method. All intercompany transactions and balances between The Hartford and its subsidiaries and affiliates that are not held for sale have been eliminated. Discontinued Operations The results of operations of a component of the Company are reported in discontinued operations when certain criteria are met as of the date of disposal, or earlier if classified as held-for-sale. When a component is identified for discontinued operations reporting, amounts for prior periods are retrospectively reclassified as discontinued operations. Components are identified as discontinued operations if they are a major part of an entity's operations and financial results such as a separate major line of business or a separate major geographical area of operations. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The most significant estimates include those used in determining property and casualty and group long-term disability insurance product reserves, net of reinsurance; evaluation of goodwill for impairment; valuation of investments and derivative instruments; valuation allowance on deferred tax assets; and contingencies relating to corporate litigation and regulatory matters. Reclassifications Certain reclassifications have been made to prior year financial information to conform to the current year presentation. In particular, restricted cash has been reclassified out of cash to a separate line on the Condensed Consolidated Balance Sheets. Restrictions on cash primarily relate to funds that are held to support regulatory and contractual obligations. Adoption of New Accounting Standards Hedging Activities On January 1, 2019, the Company adopted the Financial Accounting Standards Board's ("FASB") updated guidance for hedge accounting through a cumulative effect adjustment of less than $1 to reclassify cumulative ineffectiveness on cash flow hedges from retained earnings to accumulated other comprehensive income ("AOCI"). The updates allow hedge accounting for new types of interest rate hedges of financial instruments and simplify documentation requirements to qualify for hedge accounting. In addition, any gain or loss from hedge ineffectiveness is reported in the same income statement line with the effective hedge results and the hedged transaction. For cash flow hedges, the ineffectiveness is recognized in earnings only when the hedged transaction affects earnings; otherwise, the ineffectiveness gains or losses remain in AOCI. Under previous accounting, total hedge ineffectiveness was reported separately in realized capital gains and losses apart from the hedged transaction. The adoption did not affect the Company’s financial position or cash flows or have a material effect on net income. Leases On January 1, 2019 , the Company adopted the FASB’s updated lease guidance. Under the updated guidance, lessees with operating leases are required to recognize a liability for the present value of future minimum lease payments with a corresponding asset for the right of use of the property. Prior to the new guidance, future minimum lease payments on operating leases were commitments that were not recognized as liabilities on the balance sheet. Leases are classified as financing or operating leases. Where the lease is economically similar to a purchase because The Hartford obtains control of the underlying asset, the lease is classified as a financing lease and the Company recognizes amortization of the right of use asset and interest expense on the liability. Where the lease provides The Hartford with only the right to control the use of the underlying asset over the lease term and the lease term is greater than one year, the lease is an operating lease and the lease cost is recognized as rental expense over the lease term on a straight-line basis. Leases with a term of one year or less are also expensed over the lease term but not recognized on the balance sheet. On adoption, The Hartford recorded a lease payment obligation of $160 for outstanding leases and a right of use asset of $150 , which is net of $10 in lease incentives received, with no change to comparative periods. As permitted by the new guidance, as of the implementation date, the Company did not reassess whether expired or existing contracts are leases or contain leases, did not change the classification of expired or existing operating leases, and did not reassess initial direct costs for existing leases to determine if deferred costs should be written-off or recorded on adoption. The adoption did not impact net income or cash flows. Future Adoption of New Accounting Standards Financial Instruments - Credit Losses The FASB issued updated guidance for recognition and measurement of credit losses on financial instruments. See Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to Consolidated Financial Statements included in the Company's 2018 Form 10-K Annual Report for more information on the future adoption of the new financial instruments credit losses accounting standard. The Company will adopt the updated guidance January 1, 2020, as required, although earlier adoption is permitted. While the ultimate impact of the adoption will depend on the size and composition of the financial instruments and market conditions at the adoption date, the adoption is not expected to have a material effect on the Company’s financial position, cash flows or net income. The Company’s implementation activities are ongoing and include review and validation of methodologies, data and assumptions used to estimate expected credit losses on financial instruments carried at other than fair value as well as testing updates to our investment accounting system to establish and adjust valuation allowances for fixed maturities, available for sale (“AFS”), subject to a fair value floor.

Business Acquisitions (Notes)

Business Acquisitions (Notes)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	2 . BUSINESS ACQUISITION Navigators Group On May 23, 2019 , The Hartford acquired 100% of the outstanding shares of Navigators Group for $70 a share, or $2.121 billion in cash, comprised of cash of $2.098 billion and a liability for cash awards to replace share-based awards of $23 . The acquisition of the specialty underwriter expands product offerings and geographic reach, and adds underwriting and industry talent to strengthen the Company’s value proposition to agents and customers. Fair Value of Assets Acquired and Liabilities Assumed at the Acquisition Date As of May 23, 2019 Assets Cash and invested assets $ 3,848 Premiums receivable 492 Reinsurance recoverables 1,100 Prepaid reinsurance premiums 238 Other intangible assets 580 Property and equipment 83 Other assets 99 Total Assets Acquired 6,440 Liabilities Unpaid losses and loss adjustment expenses 2,823 Unearned premiums 1,219 Long-term debt 284 Deferred income taxes, net 48 Other liabilities 568 Total Liabilities Assumed 4,942 Net identifiable assets acquired 1,498 Goodwill [1] 623 Net Assets Acquired $ 2,121 [1] Non-deductible for income tax purposes. Intangible Assets Recorded in Connection with the Acquisition Asset Amount Weighted Average Expected Life Value of in-force contracts - Property and Casualty ("P&C") $ 180 1 Distribution relationships 302 15 Trade name 17 10 Total finite life intangibles 499 10 Capacity of Lloyd's Syndicate 66 Licenses 15 Total indefinite life intangibles 81 Total other intangible assets $ 580 The value of in-force contracts represents the estimated profits relating to the unexpired contracts in force net of related prepaid reinsurance at the acquisition date through expiry of the contracts. The value of distribution relationships was estimated using net cash flows expected to come from the renewals of in-force contracts and new business sold through existing distribution partners less costs to service the related policies. The value of the trade name was estimated using an assumed cost of a market-based royalty fee applied to net cash flows expected to come from business marketed as Navigators, a brand of The Hartford. Lloyd's of London is an insurance market-place operating worldwide ("Lloyd's"). Lloyd's does not underwrite risks. Corporate members accept underwriting risks through the syndicates that they form. The Company accepts risks as the sole corporate member of Lloyd's Syndicate 1221 ("Lloyd's Syndicate"). The value of the capacity of Lloyd’s Syndicate was estimated using net cash flows attributable to Navigators Group's right to underwrite business up to an approved level of premium in the Lloyd’s market. The values for in-force contracts, the distribution relationships, trade name and the capacity of the Lloyd's Syndicate were estimated using a discounted cash flow method. Significant inputs to the valuation models include estimates of expected new business, premium retention rates, investment returns, claim costs, expenses and discount rates based on a weighted average cost of capital. The value of licenses to write insurance in over 50 U.S. jurisdictions was estimated based on recent transactions for shell companies. Expected Pre-tax Amortization Expense [1] for Acquired Intangibles as of September 30, 2019 Value of In-force Contracts Other Intangible Assets 2019 (three months) $ 38 $ 5 2020 $ 47 $ 22 2021 $ 21 $ 22 2022 $ 9 $ 22 2023 $ — $ 22 [1] In the Condensed Consolidated Statements of Operations, the amortization of value of in-force contracts is reported in amortization of deferred policy acquisition costs and the amortization of other intangible assets is reported in amortization of other intangible assets. Property and equipment includes real estate owned and right of use assets under leases that were valued based on current values and market rental rates, software that was valued based on estimated replacement cost and furniture and equipment. These will be amortized over periods consistent with the Company’s policy. The fair value of unpaid losses and loss adjustment expenses net of related reinsurance recoverables was estimated based on the present value of expected future net unpaid loss and loss adjustment expense payments discounted using a risk-free interest rate as of the acquisition date plus a risk margin. The discount and risk margin amounts substantially offset. Debt assumed in the transaction was valued based on the principal and interest payments discounted at the current market yield. This debt was paid off in August 2019. For further discussion of this transaction, see Note 10 - Debt of Notes to Condensed Consolidated Financial Statements. The $623 of goodwill recognized is largely attributable to the acquired employee workforce and underwriting talent, leverageable operating platform, improved investment yield and economies of scale. Goodwill is allocated to the Company's Commercial Lines reporting segment. Immediately after closing on the acquisition of Navigators Group, effective May 23, 2019, the Company purchased an aggregate excess of loss reinsurance agreement covering adverse reserve development (“Navigators ADC”) from National Indemnity Company ("NICO") on behalf of Navigators Insurance Company and certain of its affiliates (collectively, the “Navigators Insurers”). Under the Navigators ADC, the Navigators Insurers paid NICO a reinsurance premium of $91 in exchange for reinsurance coverage of $300 of adverse net loss reserve development that attaches $100 above the Navigators Insurers' existing net loss and allocated loss adjustment reserves as of December 31, 2018 subject to the treaty of $1.816 billion for accidents and losses prior to December 31, 2018. In addition to recognizing a $91 before tax charge to earnings in the second quarter of 2019 for the Navigators ADC reinsurance premium, the Company recognized a charge against earnings of $97 before tax in the second quarter of 2019 as a result of a review of Navigators Insurers’ net acquired reserves upon acquisition of the business. Navigators Insurers had previously recognized $52 before tax of adverse reserve development in the first quarter of 2019, including $32 of adverse development subject to the Navigators ADC. As such, reserve development of $97 before tax in the second quarter of 2019 included $68 remaining of the $100 Navigators ADC retention for 2018 and prior accident years and $29 of adverse reserve development related to the 2019 accident year which is not covered by the ADC. The $68 of reserve development for the 2018 and prior accident years recorded in the second quarter of 2019 was net of a $91 reinsurance recoverable recognized under the Navigators ADC with the Company having ceded $91 of the $300 available limit, leaving $209 of remaining limit. There was no additional net adverse development subject to the Navigators ADC in the third quarter as reserve increases in commercial auto were offset by decreases in general liability, marine, commercial property and professional liability. The Navigators ADC will be accounted for as retroactive reinsurance and future adverse reserve development, if any, would result in recognizing a deferred gain. Since the acquisition date of May 23, 2019, the revenues and net losses of the business acquired have been included in the Company's Consolidated Statements of Operations in the Commercial Lines reporting segment and were $616 and $140 , respectively, during the period from the acquisition date to September 30, 2019, including the $91 before tax ( $72 net of tax) of premium paid for the Navigators ADC and the charge of $97 before tax ( $77 net of tax) for the increase in acquired reserves following the acquisition. The Company recognized $16 of acquisition related costs for the nine months ended September 30, 2019. These costs are included in insurance operating costs and other expenses in the Condensed Consolidated Statement of Operations. The acquisition date fair values of assets and liabilities, including insurance reserves and intangible assets, as well as the related estimated useful lives of intangibles, are provisional and are subject to revision within one year of the acquisition date. The following table presents supplemental unaudited pro forma amounts of revenue and net income for the nine months ended September 30, 2019 and 2018 for the Company as though the business was acquired on January 1, 2018. Pro forma adjustments include the revenue and earnings of Navigators Group for each period as well as amortization of identifiable intangible assets acquired. Pro Forma Results for the Nine Months Ended September 30 Revenue Earnings 2019 Supplemental (unaudited) combined pro forma $ 16,055 $ 1,532 2018 Supplemental (unaudited) combined pro forma $ 15,404 $ 1,669

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Common Share	3 . EARNINGS PER COMMON SHARE Computation of Basic and Diluted Earnings per Common Share Three Months Ended September 30, Nine Months Ended September 30, (In millions, except for per share data) 2019 2018 2019 2018 Earnings Income from continuing operations, net of tax $ 535 $ 427 $ 1,537 $ 1,289 Less: Preferred stock dividends 11 — 16 — Income from continuing operations, net of tax, available to common stockholders 524 427 $ 1,521 $ 1,289 Income from discontinued operations, net of tax, available to common stockholders — 5 — 322 Net income available to common stockholders $ 524 $ 432 $ 1,521 $ 1,611 Shares Weighted average common shares outstanding, basic 361.4 358.6 361.0 358.1 Dilutive effect of stock-based awards under compensation plans 4.0 3.6 3.4 4.0 Dilutive effect of warrants [1] — 1.9 0.7 2.0 Weighted average common shares outstanding and dilutive potential common shares 365.4 364.1 365.1 364.1 Earnings per common share Basic Income from continuing operations, net of tax, available to common stockholders $ 1.45 $ 1.19 $ 4.21 $ 3.60 Income from discontinued operations, net of tax, available to common stockholders — 0.01 — 0.90 Net income available to common stockholders $ 1.45 $ 1.20 $ 4.21 $ 4.50 Diluted Income from continuing operations, net of tax, available to common stockholders $ 1.43 $ 1.17 $ 4.17 $ 3.54 Income from discontinued operations, net of tax, available to common stockholders — 0.02 — 0.88 Net income available to common stockholders $ 1.43 $ 1.19 $ 4.17 $ 4.42 [1] On June 26, 2019, the Capital Purchase Program warrants issued in 2009 expired.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segment Information	4 . SEGMENT INFORMATION The Company currently conducts business principally in five reporting segments including Commercial Lines, Personal Lines, Property & Casualty Other Operations, Group Benefits and Hartford Funds, as well as a Corporate category. The Company includes in the Corporate category discontinued operations related to the life and annuity business sold in May 2018, reserves for run-off structured settlement and terminal funding agreement liabilities, capital raising activities (including debt financing and related interest expense), transaction expenses incurred in connection with an acquisition, certain purchase accounting adjustments related to goodwill and other expenses not allocated to the reporting segments. Corporate also includes investment management fees and expenses related to managing third party business, including management of the invested assets of Talcott Resolution Life, Inc. and its subsidiaries ("Talcott Resolution"). Talcott Resolution is the new holding company of the life and annuity business the Company sold in May 2018. In addition, Corporate includes a 9.7 % ownership interest in the legal entity that acquired the sold life and annuity business. For further discussion of continued involvement in the life and annuity business sold in May 2018, see Note 17 - Business Disposition and Discontinued Operations of Notes to Condensed Consolidated Financial Statements. The Company's revenues are generated primarily in the United States ("U.S.") as well as in the United Kingdom, continental Europe and other international locations. Net Income Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Commercial Lines $ 336 $ 289 $ 890 $ 959 Personal Lines 94 51 252 146 Property & Casualty Other Operations 18 9 52 31 Group Benefits 146 77 377 227 Hartford Funds 40 41 108 112 Corporate (99 ) (35 ) (142 ) 136 Net income 535 432 1,537 1,611 Preferred stock dividends 11 — 16 — Net income available to common stockholders $ 524 $ 432 $ 1,521 $ 1,611 Revenues Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Earned premiums and fee income: Commercial Lines Workers’ compensation $ 825 $ 845 $ 2,480 $ 2,495 Liability 330 170 731 480 Marine 59 — 86 — Package business 376 343 1,092 1,013 Property 198 154 529 456 Professional liability 137 65 304 190 Bond 67 60 192 179 Assumed reinsurance 75 — 104 — Automobile 191 157 522 454 Total Commercial Lines 2,258 1,794 6,040 5,267 Personal Lines Automobile 564 598 1,690 1,809 Homeowners 248 261 741 785 Total Personal Lines [1] 812 859 2,431 2,594 Group Benefits Group disability 697 684 2,124 2,051 Group life 621 652 1,902 1,968 Other 64 60 187 179 Total Group Benefits 1,382 1,396 4,213 4,198 Hartford Funds Mutual fund and Exchange-Traded Products ("ETP") 231 242 674 710 Talcott Resolution life and annuity separate accounts [2] 23 25 69 76 Total Hartford Funds 254 267 743 786 Corporate 18 15 43 21 Total earned premiums and fee income 4,724 4,331 13,470 12,866 Net investment income 490 444 1,448 1,323 Net realized capital gains 89 38 332 60 Other revenues 44 29 129 73 Total revenues $ 5,347 $ 4,842 $ 15,379 $ 14,322 [1] For the three months ended September 30, 2019 and 2018 , AARP members accounted for earned premiums of $729 and $758 , respectively. For the nine months ended September 30, 2019 and 2018 , AARP members accounted for earned premiums of $2.2 billion and $2.3 billion , respectively. [2] Represents revenues earned for investment advisory services on the life and annuity separate account AUM sold in May 2018 that is still managed by the Company's Hartford Funds segment. Revenue from Non-Insurance Contracts with Customers Three months ended September 30, Nine months ended September 30, Revenue Line Item 2019 2018 2019 2018 Commercial Lines Installment billing fees Fee income $ 8 $ 9 $ 26 $ 26 Personal Lines Installment billing fees Fee income 9 10 28 30 Insurance servicing revenues Other revenues 23 24 65 66 Group Benefits Administrative services Fee income 45 43 135 131 Hartford Funds Advisor, distribution and other management fees Fee income 232 245 677 722 Other fees Fee income 22 21 65 63 Corporate Investment management and other fees Fee income 14 15 38 21 Transition service revenues Other revenues 6 6 18 8 Total non-insurance revenues with customers $ 359 $ 373 $ 1,052 $ 1,067

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	5 . FAIR VALUE MEASUREMENTS The Company carries certain financial assets and liabilities at estimated fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants. Our fair value framework includes a hierarchy that gives the highest priority to the use of quoted prices in active markets, followed by the use of market observable inputs, followed by the use of unobservable inputs. The fair value hierarchy levels are as follows: Level 1 Fair values based primarily on unadjusted quoted prices for identical assets or liabilities, in active markets that the Company has the ability to access at the measurement date. Level 2 Fair values primarily based on observable inputs, other than quoted prices included in Level 1, or based on prices for similar assets and liabilities. Level 3 Fair values derived when one or more of the significant inputs are unobservable (including assumptions about risk). With little or no observable market, the determination of fair values uses considerable judgment and represents the Company’s best estimate of an amount that could be realized in a market exchange for the asset or liability. Also included are securities that are traded within illiquid markets and/or priced by independent brokers. The Company will classify the financial asset or liability by level based upon the lowest level input that is significant to the determination of the fair value. In most cases, both observable inputs (e.g., changes in interest rates) and unobservable inputs (e.g., changes in risk assumptions) are used to determine fair values that the Company has classified within Level 3. Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of September 30, 2019 Total Quoted Prices in Significant Significant Assets accounted for at fair value on a recurring basis Fixed maturities, AFS Asset-backed-securities ("ABS") $ 1,337 $ — $ 1,337 $ — Collateralized loan obligations ("CLOs") 2,158 — 1,862 296 Commercial mortgage-backed securities ("CMBS") 4,254 — 4,234 20 Corporate 17,801 — 17,078 723 Foreign government/government agencies 1,117 — 1,114 3 Municipal 9,895 — 9,895 — Residential mortgage-backed securities ("RMBS") 4,732 — 4,118 614 U.S. Treasuries 1,095 7 1,088 — Total fixed maturities 42,389 7 40,726 1,656 Fixed maturities, FVO 39 — 39 — Equity securities, at fair value 1,414 1,196 148 70 Derivative assets Credit derivatives 9 — 9 — Foreign exchange derivatives 4 — 4 — Interest rate derivatives (1 ) — (1 ) — Total derivative assets [1] 12 — 12 — Short-term investments 2,927 1,211 1,716 — Total assets accounted for at fair value on a recurring basis $ 46,781 $ 2,414 $ 42,641 $ 1,726 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives (1 ) — (1 ) — Equity derivatives (5 ) — — (5 ) Foreign exchange derivatives 4 — 4 — Interest rate derivatives (69 ) — (69 ) — Total derivative liabilities [2] (71 ) — (66 ) (5 ) Contingent consideration [3] (21 ) — — (21 ) Total liabilities accounted for at fair value on a recurring basis $ (92 ) $ — $ (66 ) $ (26 ) Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2018 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS Asset-backed-securities ("ABS") $ 1,276 $ — $ 1,266 $ 10 Collateralized loan obligations ("CLOs") 1,437 — 1,337 100 Commercial mortgage-backed securities ("CMBS") 3,552 — 3,540 12 Corporate 13,398 — 12,878 520 Foreign government/government agencies 847 — 844 3 Municipal 10,346 — 10,346 — Residential mortgage-backed securities ("RMBS") 3,279 — 2,359 920 U.S. Treasuries 1,517 330 1,187 — Total fixed maturities 35,652 330 33,757 1,565 Fixed maturities, FVO 22 — 22 — Equity securities, at fair value 1,214 1,093 44 77 Derivative assets Credit derivatives 5 — 5 — Equity derivatives 3 — — 3 Foreign exchange derivatives (2 ) — (2 ) — Interest rate derivatives 1 — 1 — Total derivative assets [1] 7 — 4 3 Short-term investments 4,283 1,039 3,244 — Total assets accounted for at fair value on a recurring basis $ 41,178 $ 2,462 $ 37,071 $ 1,645 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives (2 ) — (2 ) — Equity derivatives 1 — 1 — Foreign exchange derivatives (5 ) — (5 ) — Interest rate derivatives (62 ) — (63 ) 1 Total derivative liabilities [2] (68 ) — (69 ) 1 Contingent consideration [3] (35 ) — — (35 ) Total liabilities accounted for at fair value on a recurring basis $ (103 ) $ — $ (69 ) $ (34 ) [1] Includes derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. See footnote 2 to this table for derivative liabilities. [2] Includes derivative instruments in a net negative fair value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. [3] For additional information see the Contingent Consideration section below. In connection with the acquisition of Navigators Group , the Company has overseas deposits in Other Invested Assets of $55 as of September 30, 2019 , which are measured at fair value using the net asset value as a practical expedient. There were no overseas deposits held as of December 31, 2018 . Fixed Maturities, Equity Securities, Short-term Investments, and Derivatives Valuation Techniques The Company generally determines fair values using valuation techniques that use prices, rates, and other relevant information evident from market transactions involving identical or similar instruments. Valuation techniques also include, where appropriate, estimates of future cash flows that are converted into a single discounted amount using current market expectations. The Company uses a "waterfall" approach comprised of the following pricing sources and techniques, which are listed in priority order: • Quoted prices, unadjusted, for identical assets or liabilities in active markets, which are classified as Level 1. • Prices from third-party pricing services, which primarily utilize a combination of techniques. These services utilize recently reported trades of identical, similar, or benchmark securities making adjustments for market observable inputs available through the reporting date. If there are no recently reported trades, they may use a discounted cash flow technique to develop a price using expected cash flows based upon the anticipated future performance of the underlying collateral discounted at an estimated market rate. Both techniques develop prices that consider the time value of future cash flows and provide a margin for risk, including liquidity and credit risk. Most prices provided by third-party pricing services are classified as Level 2 because the inputs used in pricing the securities are observable. However, some securities that are less liquid or trade less actively are classified as Level 3. Additionally, certain long-dated securities, such as municipal securities and bank loans, include benchmark interest rate or credit spread assumptions that are not observable in the marketplace and are thus classified as Level 3. • Internal matrix pricing, which is a valuation process internally developed for private placement securities for which the Company is unable to obtain a price from a third-party pricing service. Internal pricing matrices determine credit spreads that, when combined with risk-free rates, are applied to contractual cash flows to develop a price. The Company develops credit spreads using market based data for public securities adjusted for credit spread differentials between public and private securities, which are obtained from a survey of multiple private placement brokers. The market-based reference credit spread considers the issuer’s financial strength and term to maturity, using an independent public security index and trade information, while the credit spread differential considers the non-public nature of the security. Securities priced using internal matrix pricing are classified as Level 2 because the inputs are observable or can be corroborated with observable data. • Independent broker quotes, which are typically non-binding, use inputs that can be difficult to corroborate with observable market based data. Brokers may use present value techniques using assumptions specific to the security types, or they may use recent transactions of similar securities. Due to the lack of transparency in the process that brokers use to develop prices, valuations that are based on independent broker quotes are classified as Level 3. The fair value of derivative instruments is determined primarily using a discounted cash flow model or option model technique and incorporates counterparty credit risk. In some cases, quoted market prices for exchange-traded and over-the-counter ("OTC") cleared derivatives may be used and in other cases independent broker quotes may be used. The pricing valuation models primarily use inputs that are observable in the market or can be corroborated by observable market data. The valuation of certain derivatives may include significant inputs that are unobservable, such as volatility levels, and reflect the Company’s view of what other market participants would use when pricing such instruments. Valuation Controls The fair value process for investments is monitored by the Valuation Committee, which is a cross-functional group of senior management within the Company that meets at least quarterly. The purpose of the committee is to oversee the pricing policy and procedures, as well as to approve changes to valuation methodologies and pricing sources. Controls and procedures used to assess third-party pricing services are reviewed by the Valuation Committee, including the results of annual due-diligence reviews. There are also two working groups under the Valuation Committee: a Securities Fair Value Working Group (“Securities Working Group”) and a Derivatives Fair Value Working Group ("Derivatives Working Group"). The working groups, which include various investment, operations, accounting and risk management professionals, meet monthly to review market data trends, pricing and trading statistics and results, and any proposed pricing methodology changes. The Securities Working Group reviews prices received from third parties to ensure that the prices represent a reasonable estimate of the fair value. The group considers trading volume, new issuance activity, market trends, new regulatory rulings and other factors to determine whether the market activity is significantly different than normal activity in an active market. A dedicated pricing unit follows up with trading and investment sector professionals and challenges prices of third-party pricing services when the estimated assumptions used differ from what the unit believes a market participant would use. If the available evidence indicates that pricing from third-party pricing services or broker quotes is based upon transactions that are stale or not from trades made in an orderly market, the Company places little, if any, weight on the third party service’s transaction price and will estimate fair value using an internal process, such as a pricing matrix. The Derivatives Working Group reviews the inputs, assumptions and methodologies used to ensure that the prices represent a reasonable estimate of the fair value. A dedicated pricing team works directly with investment sector professionals to investigate the impacts of changes in the market environment on prices or valuations of derivatives. New models and any changes to current models are required to have detailed documentation and are validated to a second source. The model validation documentation and results of validation are presented to the Valuation Committee for approval. The Company conducts other monitoring controls around securities and derivatives pricing including, but not limited to, the following: • Review of daily price changes over specific thresholds and new trade comparison to third-party pricing services. • Daily comparison of OTC derivative market valuations to counterparty valuations. • Review of weekly price changes compared to published bond prices of a corporate bond index. • Monthly reviews of price changes over thresholds, stale prices, missing prices, and zero prices. • Monthly validation of prices to a second source for securities in most sectors and for certain derivatives. In addition, the Company’s enterprise-wide Operational Risk Management function, led by the Chief Risk Officer, is responsible for model risk management and provides an independent review of the suitability and reliability of model inputs, as well as an analysis of significant changes to current models. Valuation Inputs Quoted prices for identical assets in active markets are considered Level 1 and consist of on-the-run U.S. Treasuries, money market funds, exchange-traded equity securities, open-ended mutual funds, certain short-term investments, and exchange traded futures and option contracts. Valuation Inputs Used in Levels 2 and 3 Measurements for Securities and Derivatives Level 2 Primary Observable Inputs Level 3 Primary Unobservable Inputs Fixed Maturity Investments Structured securities (includes ABS, CLOs, CMBS and RMBS) • Benchmark yields and spreads • Monthly payment information • Collateral performance, which varies by vintage year and includes delinquency rates, loss severity rates and refinancing assumptions • Credit default swap indices Other inputs for ABS and RMBS: • Estimate of future principal prepayments, derived from the characteristics of the underlying structure • Prepayment speeds previously experienced at the interest rate levels projected for the collateral • Independent broker quotes • Credit spreads beyond observable curve • Interest rates beyond observable curve Other inputs for less liquid securities or those that trade less actively, including subprime RMBS: • Estimated cash flows • Credit spreads, which include illiquidity premium • Constant prepayment rates • Constant default rates • Loss severity Corporates • Benchmark yields and spreads • Reported trades, bids, offers of the same or similar securities • Issuer spreads and credit default swap curves Other inputs for investment grade privately placed securities that utilize internal matrix pricing: • Credit spreads for public securities of similar quality, maturity, and sector, adjusted for non-public nature • Independent broker quotes • Credit spreads beyond observable curve • Interest rates beyond observable curve Other inputs for below investment grade privately placed securities: • Independent broker quotes • Credit spreads for public securities of similar quality, maturity, and sector, adjusted for non-public nature U.S. Treasuries, Municipals, and Foreign government/government agencies • Benchmark yields and spreads • Issuer credit default swap curves • Political events in emerging market economies • Municipal Securities Rulemaking Board reported trades and material event notices • Issuer financial statements • Credit spreads beyond observable curve • Interest rates beyond observable curve Equity Securities • Quoted prices in markets that are not active • For privately traded equity securities, internal discounted cash flow models utilizing earnings multiples or other cash flow assumptions that are not observable Short-term Investments • Benchmark yields and spreads • Reported trades, bids, offers • Issuer spreads and credit default swap curves • Material event notices and new issue money market rates Not applicable Derivatives Credit derivatives • Swap yield curve • Credit default swap curves Not applicable Equity derivatives • Equity index levels • Swap yield curve • Independent broker quotes • Equity volatility Foreign exchange derivatives • Swap yield curve • Currency spot and forward rates • Cross currency basis curves Not applicable Interest rate derivatives • Swap yield curve • Independent broker quotes • Interest rate volatility Significant Unobservable Inputs for Level 3 - Securities Assets accounted for at fair value on a recurring basis Fair Predominant Significant Unobservable Input Minimum Maximum Weighted Average [1] Impact of As of September 30, 2019 CLOs [3] $ 225 Discounted cash flows Spread 235 bps 244 bps 240 bps Decrease CMBS [3] $ 11 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 9 bps 1,832 bps 197 bps Decrease Corporate [4] $ 508 Discounted cash flows Spread 126 bps 668 bps 223 bps Decrease RMBS [3] $ 614 Discounted cash flows Spread [6] 15 bps 231 bps 73 bps Decrease Constant prepayment rate [6] 1% 11% 6% Decrease [5] Constant default rate [6] 1% 5% 3% Decrease Loss severity [6] —% 100% 72% Decrease As of December 31, 2018 CMBS [3] $ 2 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 9 bps 1,040 bps 182 bps Decrease Corporate [4] $ 274 Discounted cash flows Spread 145 bps 1,175 bps 263 bps Decrease RMBS [3] $ 815 Discounted cash flows Spread [6] 12 bps 215 bps 86 bps Decrease Constant prepayment rate [6] 1% 15% 6% Decrease [5] Constant default rate [6] 1% 8% 3% Decrease Loss severity [6] —% 100% 61% Decrease [1] The weighted average is determined based on the fair value of the securities. [2] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. [3] Excludes securities for which the Company bases fair value on broker quotations. [4] Excludes securities for which the Company bases fair value on broker quotations; however, included are broker priced lower-rated private placement securities for which the Company receives spread and yield information to corroborate the fair value. [5] Decrease for above market rate coupons and increase for below market rate coupons. [6] Generally, a change in the assumption used for the constant default rate would have been accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for constant prepayment rate and would have resulted in wider spreads. Significant Unobservable Inputs for Level 3 - Derivatives Fair Predominant Significant Unobservable Input Minimum Maximum Weighted Average [1] Impact of As of September 30, 2019 Equity options $ (5 ) Option model Equity volatility 11 % 25 % 15 % Increase As of December 31, 2018 Interest rate swaptions [3] $ 1 Option model Interest rate volatility 3 % 3 % 3 % Increase Equity options $ 3 Option model Equity volatility 19 % 21 % 20 % Increase [1] The weighted average is determined based on the fair value of the derivatives. [2] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. Changes are based on long positions, unless otherwise noted. Changes in fair value will be inversely impacted for short positions. [3] The swaptions presented are purchased options that have the right to enter into a pay-fixed swap. The tables above exclude certain securities for which fair values are predominately based on independent broker quotes. While the Company does not have access to the significant unobservable inputs that independent brokers may use in their pricing process, the Company believes brokers likely use inputs similar to those used by the Company and third-party pricing services to price similar instruments. As such, in their pricing models, brokers likely use estimated loss severity rates, prepayment rates, constant default rates and credit spreads. Therefore, similar to non-broker priced securities, increases in these inputs would generally cause fair values to decrease. As of September 30, 2019 , no significant adjustments were made by the Company to broker prices received. Contingent Consideration The acquisition of Lattice Strategies LLC ("Lattice") on July 29, 2016 requires the Company to make payments to former owners of Lattice of up to $60 contingent upon growth in exchange-traded products ("ETP") assets under management ("AUM") over a period of four years beginning on the date of acquisition. The contingent consideration is measured at fair value on a quarterly basis by projecting future eligible ETP AUM over the contingency period to estimate the amount of expected payout. The future expected payout is discounted back to the valuation date using a risk-adjusted discount rate of 11.4% . The risk-adjusted discount rate is an internally generated and significant unobservable input to fair value. The contingency period for ETP AUM growth ends July 29, 2020 and management adjusts the fair value of the contingent consideration when it revises its projection of ETP AUM for the acquired business. Before discounting to fair value, the Company estimates a total contingent consideration payout of $ 43 , of which $20 was paid in the first nine months of 2019 with ETP AUM of $2.6 billion as of September 30, 2019. Accordingly, as of September 30, 2019, the fair value of $21 reflects remaining consideration payable of $23 , assuming ETP AUM for the acquired business grows to approximately $4.1 billion over the contingency period. Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs The Company uses derivative instruments to manage the risk associated with certain assets and liabilities. However, the derivative instrument may not be classified with the same fair value hierarchy level as the associated asset or liability. Therefore, the realized and unrealized gains and losses on derivatives reported in the Level 3 rollforward may be offset by realized and unrealized gains and losses of the associated assets and liabilities in other line items of the financial statements. Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Three Months Ended September 30, 2019 Total realized/unrealized gains (losses) Fair value as of June 30, 2019 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2019 Assets Fixed Maturities, AFS ABS $ 5 $ — $ — $ — $ — $ — $ — $ (5 ) $ — CLOs 286 — — 92 (8 ) — — (74 ) 296 CMBS 35 — — 10 (1 ) — — (24 ) 20 Corporate 568 (3 ) — 166 (7 ) (4 ) 15 (12 ) 723 Foreign Govt./Govt. Agencies 3 — — — — — — — 3 RMBS 758 — (3 ) — (51 ) — — (90 ) 614 Total Fixed Maturities, AFS 1,655 (3 ) (3 ) 268 (67 ) (4 ) 15 (205 ) 1,656 Equity Securities, at fair value 72 (2 ) — — — — — — 70 Total Assets $ 1,727 $ (5 ) $ (3 ) $ 268 $ (67 ) $ (4 ) $ 15 $ (205 ) $ 1,726 Liabilities Contingent Consideration (21 ) — — — — — — — (21 ) Derivatives, net [4] Equity (3 ) (2 ) — — — — — — (5 ) Total Derivatives, net [4] (3 ) (2 ) — — — — — — (5 ) Total Liabilities $ (24 ) $ (2 ) $ — $ — $ — $ — $ — $ — $ (26 ) Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Nine Months Ended September 30, 2019 Total realized/unrealized gains (losses) Fair value as of January 1, 2019 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2019 Assets Fixed Maturities, AFS ABS $ 10 $ — $ — $ 5 $ (1 ) $ — $ — $ (14 ) $ — CLOs 100 — — 329 (18 ) (6 ) — (109 ) 296 CMBS 12 — 1 34 (3 ) — — (24 ) 20 Corporate 520 (4 ) 9 261 (13 ) (68 ) 61 (43 ) 723 Foreign Govt./Govt. Agencies 3 — — — — — — — 3 RMBS 920 1 (5 ) 134 (163 ) (35 ) — (238 ) 614 Total Fixed Maturities, AFS 1,565 (3 ) 5 763 (198 ) (109 ) 61 (428 ) 1,656 Equity Securities, at fair value 77 (3 ) — 9 — (13 ) — — 70 Derivatives, net [4] Interest rate 1 (1 ) — — — — — — — Total Derivatives, net [4] 1 (1 ) — — — — — — — Total Assets $ 1,643 $ (7 ) $ 5 $ 772 $ (198 ) $ (122 ) $ 61 $ (428 ) $ 1,726 Liabilities Contingent Consideration (35 ) (6 ) — — 20 — — — (21 ) Derivatives, net [4] Equity 3 (8 ) — — — — — — (5 ) Total Derivatives, net [4] 3 (8 ) — — — — — — (5 ) Total Liabilities $ (32 ) $ (14 ) $ — $ — $ 20 $ — $ — $ — $ (26 ) Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Three Months Ended September 30, 2018 Total realized/unrealized gains (losses) Fair value as of June 30, 2018 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2018 Assets Fixed Maturities, AFS ABS $ 57 $ — $ — $ 39 $ (2 ) $ — $ 9 $ (49 ) $ 54 CLOs 159 — — 211 — — — (74 ) 296 CMBS 28 (1 ) 1 — (1 ) — — (5 ) 22 Corporate 559 — (2 ) 12 (2 ) (12 ) — (4 ) 551 Foreign Govt./Govt. Agencies 3 — — — — — — — 3 Municipal 9 — — — — — — — 9 RMBS 1,137 — (3 ) — (77 ) (26 ) — (97 ) 934 Total Fixed Maturities, AFS 1,952 (1 ) (4 ) 262 (82 ) (38 ) 9 (229 ) 1,869 Equity Securities, at fair value 66 — — 12 — — — — 78 Derivatives, net [4] Equity 1 — — — — — — — 1 Interest rate 2 — — — — — — — 2 Total Derivatives, net [4] 3 — — — — — — — 3 Total Assets $ 2,021 $ (1 ) $ (4 ) $ 274 $ (82 ) $ (38 ) $ 9 $ (229 ) $ 1,950 Liabilities Contingent Consideration (31 ) (1 ) — — — — — — (32 ) Total Liabilities $ (31 ) $ (1 ) $ — $ — $ — $ — $ — $ — $ (32 ) Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Nine Months Ended September 30, 2018 Total realized/unrealized gains (losses) Fair value as of January 1, 2018 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2018 Assets Fixed Maturities, AFS ABS $ 19 $ — $ — $ 89 $ (5 ) $ — $ 12 $ (61 ) $ 54 CLOs 95 — — 309 — (4 ) — (104 ) 296 CMBS 69 (1 ) — 25 (4 ) (8 ) — (59 ) 22 Corporate 520 1 (10 ) 143 (34 ) (43 ) 15 (41 ) 551 Foreign Govt./Govt. Agencies 2 — — 1 — — — — 3 Municipal 17 — (1 ) — — — — (7 ) 9 RMBS 1,230 — (10 ) 170 (251 ) (27 ) — (178 ) 934 Total Fixed Maturities, AFS 1,952 — (21 ) 737 (294 ) (82 ) 27 (450 ) 1,869 Equity Securities, at fair value 76 28 1 13 — (40 ) — — 78 Derivatives, net [4] Equity 1 1 — 1 — (2 ) — — 1 Interest rate 1 1 — — — — — — 2 Total Derivatives, net [4] 2 2 — 1 — (2 ) — — 3 Total Assets $ 2,030 $ 30 $ (20 ) $ 751 $ (294 ) $ (124 ) $ 27 $ (450 ) $ 1,950 Liabilities Contingent Consideration (29 ) (3 ) — — — — — — (32 ) Total Liabilities $ (29 ) $ (3 ) $ — $ — $ — $ — $ — $ — $ (32 ) [1] Amounts in these columns are generally reported in net realized capital gains (losses). All amounts are before income taxes. [2] All amounts are before income taxes. [3] Transfers in and/or (out) of Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing inputs. [4] Derivative instruments are reported in this table on a net basis for asset (liability) positions and reported in the Condensed Consolidated Balance Sheets in other investments and other liabilities. Changes in Unrealized Gains (Losses) for Financial Instruments Classified as Level 3 Still Held at End of Period Three months ended September 30, Nine months ended September 30, 2019 2018 2019 2018 2019 2018 2019 2018 Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Assets Fixed Maturities, AFS CLOs $ — $ — $ — $ — $ — $ — $ 1 $ — CMBS — — — 1 — — — 1 Corporate (2 ) — — (2 ) (3 ) — 8 (11 ) Foreign Govt./Govt. Agencies — — — — — — 1 — RMBS — — (3 ) (3 ) — — (4 ) (10 ) Total Fixed Maturities, AFS (2 ) — (3 ) (4 ) (3 ) — 6 (20 ) Equity Securities, at fair value (2 ) — — — (2 ) — — — Derivatives, net Equity — (1 ) — — — (1 ) — — Interest rate — — — — (1 ) — — — Total Derivatives, net — (1 ) — — (1 ) (1 ) — — Total Assets $ (4 ) $ (1 ) $ (3 ) $ (4 ) $ (6 ) $ (1 ) $ 6 $ (20 ) Liabilities Contingent Consideration — (1 ) — — (6 ) (3 ) — — Derivatives, net Equity (2 ) — — — (8 ) — — — Total Derivatives, net (2 ) — — — (8 ) — — — Total Liabilities $ (2 ) $ (1 ) $ — $ — $ (14 ) $ (3 ) $ — $ — [1] All amounts in these rows are reported in net realized capital gains (losses). All amounts are before income taxes. [2] Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein. [3] Changes in unrealized gain (loss) on fixed maturities, AFS are reported in changes in net unrealized gain on securities in the Condensed Consolidated Statements of Comprehensive Income. Changes in interest rate derivatives are reported in changes in net gain on cash flow hedging instruments in the Condensed Consolidated Statements of Comprehensive Income. Fair Value Option The Company has elected the fair value option for certain RMBS that contain embedded credit derivatives with underlying credit risk. These securities are included within Fixed Maturities, FVO on the Condensed Consolidated Balance Sheets and changes in the fair value of these securities are reported in net realized capital gains and losses. As of September 30, 2019 and December 31, 2018 , the fair value of assets and liabilities using the fair value option was $39 and $22 , respectively, within the residential real estate sector. For the three and nine months ended September 30, 2019 and 2018 there were no realized capital gains (losses) related to the fair value of assets using the fair value option. Financial Instruments Not Carried at Fair Value Financial Assets and Liabilities Not Carried at Fair Value September 30, 2019 December 31, 2018 Fair Value Hierarchy Level Carrying Amount Fair Value Fair Value Hierarchy Level Carrying Amount Fair Value Assets Mortgage loans Level 3 $ 3,736 $ 3,900 Level 3 $ 3,704 $ 3,746 Liabilities Other policyholder funds and benefits payable Level 3 $ 772 $ 774 Level 3 $ 774 $ 775 Senior notes [1] Level 2 $ 3,757 $ 4,416 Level 2 $ 3,589 $ 3,887 Junior subordinated debentures [1] Level 2 $ 1,089 $ 1,122 Level 2 $ 1,089 $ 1,052 [1] Included in long-term debt in the Condensed Consolidated Balance Sheets, except for current maturities, which are included in short-term debt.

Investments

Investments	9 Months Ended
	Sep. 30, 2019
Investments [Abstract]
Investments	6 . INVESTMENTS Net Realized Capital Gains Three Months Ended September 30, Nine Months Ended September 30, (Before tax) 2019 2018 2019 2018 Gross gains on sales $ 77 $ 26 $ 190 $ 91 Gross losses on sales (4 ) (41 ) (44 ) (129 ) Equity securities [1] 19 46 181 88 Net OTTI losses recognized in earnings (1 ) (1 ) (3 ) (1 ) Valuation allowances on mortgage loans — — 1 — Transactional foreign currency revaluation — — — 1 Non-qualifying foreign currency derivatives 2 1 2 2 Other, net [2] (4 ) 7 5 8 Net realized capital gains $ 89 $ 38 $ 332 $ 60 [1] Includes all changes in fair value and trading gains and losses for equity securities. The net unrealized gain (loss) on equity securities included in net realized capital gains (losses) related to equity securities still held as of September 30, 2019 , were $17 and $100 for the three and nine months ended September 30, 2019 , respectively. The net unrealized gain (loss) on equity securities included in net realized capital gains (losses) related to equity securities still held as of September 30, 2018 , were $41 and $50 for the three and nine months ended September 30, 2018 , respectively. [2] Includes gains (losses) on non-qualifying derivatives, excluding foreign currency derivatives, of $(7) and $8 , respectively, for the three months ended September 30, 2019 and 2018 . For the nine months ended September 30, 2019 and 2018 , the non-qualifying derivatives, excluding foreign currency derivatives, were $1 and $6 respectively. Net realized capital gains (losses) from investment sales are reported as a component of revenues and are determined on a specific identification basis. Before tax, net gains (losses) on sales and impairments previously reported as unrealized gains (losses) in AOCI were $72 and $143 for the three and nine months ended September 30, 2019, respectively, and $(15) and $(59) for the three and nine months ended September 30, 2018, respectively. Proceeds from the sales of AFS securities totaled $2.6 billion and $11.5 billion for the three and nine months ended September 30, 2019 , respectively, and $4.6 billion and $13.1 billion , for the three and nine months ended September 30, 2018, respectively. Recognition and Presentation of Other-Than-Temporary Impairments The Company will record an other-than-temporary impairment (“OTTI”) for fixed maturities if the Company intends to sell or it is more likely than not that the Company will be required to sell the security before a recovery in value. A corresponding charge is recorded in net realized capital losses equal to the difference between the fair value and amortized cost basis of the security. The Company will also record an OTTI for those fixed maturities for which the Company does not expect to recover the entire amortized cost basis. For these securities, the excess of the amortized cost basis over its fair value is separated into the portion representing a credit OTTI, which is recorded in net realized capital losses, and the remaining non-credit amount, which is recorded in OCI. The credit OTTI amount is the excess of its amortized cost basis over the Company’s best estimate of discounted expected future cash flows. The non-credit amount is the excess of the best estimate of the discounted expected future cash flows over the fair value. The Company’s best estimate of discounted expected future cash flows becomes the new cost basis and accretes prospectively into net investment income over the estimated remaining life of the security. Developing the Company’s best estimate of expected future cash flows is a quantitative and qualitative process that incorporates information received from third-party sources along with certain internal assumptions regarding the future performance. The Company's considerations include, but are not limited to, (a) changes in the financial condition of the issuer and the underlying collateral, (b) whether the issuer is current on contractually obligated interest and principal payments, (c) credit ratings, (d) payment structure of the security and (e) the extent to which the fair value has been less than the amortized cost of the security. For non-structured securities, assumptions include, but are not limited to, economic and industry-specific trends and fundamentals, security-specific developments, industry earnings multiples and the issuer’s ability to restructure and execute asset sales. For structured securities, assumptions include, but are not limited to, various performance indicators such as historical and projected default and recovery rates, credit ratings, current and projected delinquency rates, loan-to-value ("LTV") ratios, average cumulative collateral loss rates that vary by vintage year, prepayment speeds, and property value declines. These assumptions require the use of significant management judgment and include the probability of issuer default and estimates regarding timing and amount of expected recoveries which may include estimating the underlying collateral value. Impairments in Earnings by Type Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Credit impairments $ 1 $ 1 $ 3 $ 1 Total impairments $ 1 $ 1 $ 3 $ 1 Cumulative Credit Impairments Three Months Ended September 30, Nine Months Ended September 30, (Before tax) 2019 2018 2019 2018 Balance as of beginning of period $ (18 ) $ (20 ) $ (19 ) $ (25 ) Additions for credit impairments recognized on [1]: Securities not previously impaired (1 ) — (3 ) — Securities previously impaired — (1 ) — (1 ) Reductions for credit impairments previously recognized on: Securities that matured or were sold during the period — 1 3 6 Balance as of end of period $ (19 ) $ (20 ) $ (19 ) $ (20 ) [1] These additions are included in the net OTTI losses recognized in earnings in the Condensed Consolidated Statements of Operations. Available-for-Sale Securities AFS Securities by Type September 30, 2019 December 31, 2018 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Non-Credit OTTI [1] Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Non-Credit OTTI [1] ABS $ 1,315 $ 23 $ (1 ) $ 1,337 $ — $ 1,272 $ 5 $ (1 ) $ 1,276 $ — CLOs 2,162 4 (8 ) 2,158 — 1,455 2 (20 ) 1,437 — CMBS 4,067 193 (6 ) 4,254 (4 ) 3,581 35 (64 ) 3,552 (5 ) Corporate 16,867 970 (36 ) 17,801 — 13,696 148 (446 ) 13,398 — Foreign govt./govt. agencies 1,053 65 (1 ) 1,117 — 866 7 (26 ) 847 — Municipal 9,095 801 (1 ) 9,895 — 9,972 421 (47 ) 10,346 — RMBS 4,626 107 (1 ) 4,732 — 3,270 44 (35 ) 3,279 — U.S. Treasuries 989 106 — 1,095 — 1,491 41 (15 ) 1,517 — Total fixed maturities, AFS $ 40,174 $ 2,269 $ (54 ) $ 42,389 $ (4 ) $ 35,603 $ 703 $ (654 ) $ 35,652 $ (5 ) [1] Represents the amount of cumulative non-credit OTTI losses recognized in OCI on securities that also had credit impairments. These losses are included in gross unrealized losses as of September 30, 2019 and December 31, 2018 . Fixed maturities, AFS, by Contractual Maturity Year September 30, 2019 December 31, 2018 Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 1,226 $ 1,233 $ 999 $ 1,002 Over one year through five years 7,144 7,333 5,786 5,791 Over five years through ten years 7,405 7,812 6,611 6,495 Over ten years 12,229 13,530 12,629 12,820 Subtotal 28,004 29,908 26,025 26,108 Mortgage-backed and asset-backed securities 12,170 12,481 9,578 9,544 Total fixed maturities, AFS $ 40,174 $ 42,389 $ 35,603 $ 35,652 Estimated maturities may differ from contractual maturities due to security call or prepayment provisions. Due to the potential for variability in payment speeds (i.e. prepayments or extensions), mortgage-backed and asset-backed securities are not categorized by contractual maturity. Concentration of Credit Risk The Company aims to maintain a diversified investment portfolio including issuer, sector and geographic stratification, where applicable, and has established certain exposure limits, diversification standards and review procedures to mitigate credit risk. The Company had no investment exposure to any credit concentration risk of a single issuer greater than 10% of the Company's stockholders' equity as of September 30, 2019 or December 31, 2018 other than U.S. government securities and certain U.S. government agencies. Unrealized Losses on AFS Securities Unrealized Loss Aging for AFS Securities by Type and Length of Time as of September 30, 2019 Less Than 12 Months 12 Months or More Total Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses ABS $ 144 $ 143 $ (1 ) $ 11 $ 11 $ — $ 155 $ 154 $ (1 ) CLOs 1,109 1,105 (4 ) 429 425 (4 ) 1,538 1,530 (8 ) CMBS 88 87 (1 ) 31 26 (5 ) 119 113 (6 ) Corporate 930 918 (12 ) 497 473 (24 ) 1,427 1,391 (36 ) Foreign govt./govt. agencies 58 58 — 39 38 (1 ) 97 96 (1 ) Municipal 128 127 (1 ) — — — 128 127 (1 ) RMBS 166 165 (1 ) 69 69 — 235 234 (1 ) U.S. Treasuries 37 37 — 119 119 — 156 156 — Total fixed maturities, AFS in an unrealized loss position $ 2,660 $ 2,640 $ (20 ) $ 1,195 $ 1,161 $ (34 ) $ 3,855 $ 3,801 $ (54 ) Unrealized Loss Aging for AFS Securities by Type and Length of Time as of December 31, 2018 Less Than 12 Months 12 Months or More Total Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses ABS $ 566 $ 566 $ — $ 113 $ 112 $ (1 ) $ 679 $ 678 $ (1 ) CLOs 1,358 1,338 (20 ) 7 7 — 1,365 1,345 (20 ) CMBS 896 882 (14 ) 1,129 1,079 (50 ) 2,025 1,961 (64 ) Corporate 7,174 6,903 (271 ) 2,541 2,366 (175 ) 9,715 9,269 (446 ) Foreign govt./govt. agencies 407 391 (16 ) 203 193 (10 ) 610 584 (26 ) Municipal 1,643 1,613 (30 ) 292 275 (17 ) 1,935 1,888 (47 ) RMBS 1,344 1,329 (15 ) 648 628 (20 ) 1,992 1,957 (35 ) U.S. Treasuries 497 492 (5 ) 339 329 (10 ) 836 821 (15 ) Total fixed maturities, AFS in an unrealized loss position $ 13,885 $ 13,514 $ (371 ) $ 5,272 $ 4,989 $ (283 ) $ 19,157 $ 18,503 $ (654 ) As of September 30, 2019 , AFS securities in an unrealized loss position consisted of 781 securities, primarily in the corporate sector, which were depressed primarily due to widening of credit spreads since the securities were purchased. As of September 30, 2019 , 95% of these securities were depressed less than 20% of cost or amortized cost. The decrease in unrealized losses during the nine months ended September 30, 2019 was primarily attributable to lower interest rates and tighter credit spreads. Most of the securities depressed for twelve months or more relate to corporate securities which were primarily depressed because current market spreads are wider than at the securities' respective purchase dates. The Company neither has an intention to sell nor does it expect to be required to sell the securities outlined in the preceding discussion. Mortgage Loans Mortgage Loan Valuation Allowances Mortgage loans are considered to be impaired when management estimates that, based upon current information and events, it is probable that the Company will be unable to collect amounts due according to the contractual terms of the loan agreement. The Company reviews mortgage loans on a quarterly basis to identify potential credit losses. Among other factors, management reviews current and projected macroeconomic trends, such as unemployment rates and property-specific factors such as rental rates, occupancy levels, LTV ratios and debt service coverage ratios (“DSCR”). In addition, the Company considers historical, current and projected delinquency rates and property values. Estimates of collectibility require the use of significant management judgment and include the probability and timing of borrower default and loss severity estimates. In addition, cash flow projections may change based upon new information about the borrower's ability to pay and/or the value of underlying collateral such as changes in projected property value estimates. For mortgage loans that are deemed impaired, a valuation allowance is established for the difference between the carrying amount and estimated fair value. The mortgage loan's estimated fair value is most frequently the Company's share of the fair value of the collateral but may also be the Company’s share of either (a) the present value of the expected future cash flows discounted at the loan’s effective interest rate or (b) the loan’s observable market price. A valuation allowance may be recorded for an individual loan or for a group of loans that have an LTV ratio of 90% or greater, a low DSCR or have other lower credit quality characteristics. Changes in valuation allowances are recorded in net realized capital gains and losses. Interest income on impaired loans is accrued to the extent it is deemed collectible and the borrowers continue to make payments under the original or restructured loan terms. The Company stops accruing interest income on loans when it is probable that the Company will not receive interest and principal payments according to the contractual terms of the loan agreement. The Company resumes accruing interest income when it determines that sufficient collateral exists to satisfy the full amount of the loan principal and interest payments and when it is probable cash will be received in the foreseeable future. Interest income on defaulted loans is recognized when received. As of September 30, 2019 , mortgage loans had an amortized cost of $3.7 billion and carrying value of $3.7 billion , with no valuation allowance. As of December 31, 2018 , mortgage loans had an amortized cost of $3.7 billion and carrying value of $3.7 billion, with a valuation allowance of $1 . As of September 30, 2019 , there were no mortgage loans that had a valuation allowance. As of December 31, 2018 , the carrying value of mortgage loans that had a valuation allowance was $23 . There were no mortgage loans held-for-sale as of September 30, 2019 or December 31, 2018 . As of September 30, 2019 , the Company had no mortgage loans that have had extensions or restructurings other than what is allowable under the original terms of the contract. The following table presents the activity within the Company’s valuation allowance for mortgage loans. These loans have been evaluated both individually and collectively for impairment. Loans evaluated collectively for impairment are immaterial. Valuation Allowance Activity 2019 2018 Balance, as of January 1 $ (1 ) $ (1 ) Reversals 1 — Deductions — — Balance, as of September 30 $ — $ (1 ) The weighted-average LTV ratio of the Company’s mortgage loan portfolio was 52% as of September 30, 2019 , while the weighted-average LTV ratio at origination of these loans was 61% . LTV ratios compare the loan amount to the value of the underlying property collateralizing the loan. The loan collateral values are updated no less than annually through reviews of the underlying properties. Factors considered in estimating property values include, among other things, actual and expected property cash flows, geographic market data and the ratio of the property's net operating income to its value. DSCR compares a property’s net operating income to the borrower’s principal and interest payments. As of September 30, 2019 and December 31, 2018 , the Company held no delinquent commercial mortgage loans past due by 90 days or more. Mortgage Loans Credit Quality September 30, 2019 December 31, 2018 Loan-to-value Carrying Value Avg. Debt-Service Coverage Ratio Carrying Value Avg. Debt-Service Coverage Ratio 65% - 80% 481 1.53x 386 1.60x Less than 65% 3,255 2.52x 3,318 2.59x Total mortgage loans $ 3,736 2.39x $ 3,704 2.49x Mortgage Loans by Region September 30, 2019 December 31, 2018 Carrying Value Percent of Total Carrying Value Percent of Total East North Central $ 274 7.3 % $ 250 6.8 % Middle Atlantic 306 8.2 % 270 7.3 % Mountain 63 1.7 % 30 0.8 % New England 345 9.2 % 330 8.9 % Pacific 835 22.4 % 917 24.8 % South Atlantic 743 19.9 % 712 19.2 % West North Central 121 3.2 % 148 4.0 % West South Central 406 10.9 % 420 11.3 % Other [1] 643 17.2 % 627 16.9 % Total mortgage loans $ 3,736 100.0 % $ 3,704 100.0 % [1] Primarily represents loans collateralized by multiple properties in various regions. Mortgage Loans by Property Type September 30, 2019 December 31, 2018 Carrying Value Percent of Total Carrying Percent of Total Commercial Industrial $ 1,156 30.9 % $ 1,108 29.9 % Multifamily 1,156 30.9 % 1,138 30.7 % Office 719 19.3 % 708 19.1 % Retail 430 11.5 % 392 10.6 % Single Family 135 3.6 % 82 2.2 % Other 140 3.8 % 276 7.5 % Total mortgage loans $ 3,736 100.0 % $ 3,704 100.0 % Mortgage Servicing The Company originates, sells and services commercial mortgage loans on behalf of third parties and recognizes servicing fee income over the period that services are performed. As of September 30, 2019 , under this program, the Company serviced mortgage loans with a total outstanding principal of $6.6 billion , of which $4.1 billion was serviced on behalf of third parties and $2.5 billion was retained and reported in total investments on the Company's Condensed Consolidated Balance Sheets . As of December 31, 2018 , the Company serviced mortgage loans with a total outstanding principal balance of $6.0 billion , of which $3.6 billion was serviced on behalf of third parties and $2.4 billion was retained and reported in total investments on the Company's Condensed Consolidated Balance Sheets. Servicing rights are carried at the lower of cost or fair value and were zero as of September 30, 2019 and December 31, 2018 , because servicing fees were market-level fees at origination and remain adequate to compensate the Company for servicing the loans. Variable Interest Entities The Company is engaged with various special purpose entities and other entities that are deemed to be VIEs primarily as an investor through normal investment activities but also as an investment manager. A VIE is an entity that either has investors that lack certain essential characteristics of a controlling financial interest, such as simple majority kick-out rights, or lacks sufficient funds to finance its own activities without financial support provided by other entities. The Company performs ongoing qualitative assessments of its VIEs to determine whether the Company has a controlling financial interest in the VIE and therefore is the primary beneficiary. The Company is deemed to have a controlling financial interest when it has both the ability to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE. Based on the Company’s assessment, if it determines it is the primary beneficiary, the Company consolidates the VIE in the Company’s Condensed Consolidated Financial Statements. Consolidated VIEs As of September 30, 2019 and December 31, 2018 , the Company did not hold any securities for which it is the primary beneficiary. Non-consolidated VIEs The Company, through normal investment activities, makes passive investments in limited partnerships and other alternative investments. For these non-consolidated VIEs, the Company has determined it is not the primary beneficiary as it has no ability to direct activities that could significantly affect the economic performance of the investments. The Company’s maximum exposure to loss as of September 30, 2019 and December 31, 2018 was limited to the total carrying value of $1.1 billion and $1.0 billion , respectively, which are included in limited partnerships and other alternative investments in the Company's Condensed Consolidated Balance Sheets. As of September 30, 2019 and December 31, 2018 , the Company has outstanding commitments totaling $808 and $718 , respectively, whereby the Company is committed to fund these investments and may be called by the partnership during the commitment period to fund the purchase of new investments and partnership expenses. These investments are generally of a passive nature in that the Company does not take an active role in management. For further discussion of these investments, see Equity Method Investments within Note 6 - Investments of Notes to Consolidated Financial Statements included in the Company’s 2018 Form 10-K Annual Report. In addition, the Company also makes passive investments in structured securities issued by VIEs for which the Company is not the manager. These investments include ABS, CLOs, CMBS and RMBS and are reported in fixed maturities, available-for-sale, and fixed maturities, FVO, in the Company’s Condensed Consolidated Balance Sheets. The Company has not provided financial or other support with respect to these investments other than its original investment. For these investments, the Company determined it is not the primary beneficiary due to the relative size of the Company’s investment in comparison to the principal amount of the structured securities issued by the VIEs, the level of credit subordination which reduces the Company’s obligation to absorb losses or right to receive benefits and the Company’s inability to direct the activities that most significantly impact the economic performance of the VIEs. The Company’s maximum exposure to loss on these investments is limited to the amount of the Company’s investment. Securities Lending, Repurchase Agreements, and Other Collateral Transactions and Restricted Investments The Company enters into securities financing transactions as a way to earn additional income or manage liquidity, primarily through securities lending and repurchase agreements. Payables for Collateral on Investments September 30, 2019 December 31, 2018 Fair Value Fair Value Securities Lending Transactions: Gross amount of securities on loan $ 603 $ 820 Gross amount of associated liability for collateral received [1] $ 618 $ 840 Repurchase agreements: Gross amount of recognized liabilities for repurchase agreements $ — $ 72 Gross amount of collateral pledged related to repurchase agreements [2] $ — $ 73 Gross amount of recognized receivables for reverse repurchase agreements $ 52 $ 64 [1] Cash collateral received is reinvested in fixed maturities, AFS and short-term investments which are included in the Condensed Consolidated Balance Sheets. Amount includes additional securities collateral received of $0 and $3 which are excluded from the Company's Condensed Consolidated Balance Sheets as of September 30, 2019 and December 31, 2018 , respectively. [2] Collateral pledged is included within fixed maturities, AFS and short-term investments in the Company's Condensed Consolidated Balance Sheets. Securities Lending Under a securities lending program, the Company lends certain fixed maturities within the corporate, foreign government/government agencies, and municipal sectors as well as equity securities to qualifying third-party borrowers in return for collateral in the form of cash or securities. For domestic and non-domestic loaned securities, respectively, borrowers provide collateral of 102% and 105% of the fair value of the securities lent at the time of the loan. Borrowers will return the securities to the Company for cash or securities collateral at maturity dates generally of 90 days or less. Security collateral on deposit from counterparties in connection with securities lending transactions may not be sold or re-pledged, except in the event of default by the counterparty, and is not reflected on the Company’s Condensed Consolidated Balance Sheets. Additional collateral is obtained if the fair value of the collateral falls below 100% of the fair value of the loaned securities. The agreements are continuous and do not have stated maturity dates and provide the counterparty the right to sell or re-pledge the securities loaned. If cash, rather than securities, is received as collateral, the cash is typically invested in short-term investments or fixed maturities and is reported as an asset on the Company's Condensed Consolidated Balance Sheets. Income associated with securities lending transactions is reported as a component of net investment income in the Company’s Condensed Consolidated Statements of Operations. Repurchase Agreements From time to time, the Company enters into repurchase agreements to manage liquidity or to earn incremental income. A repurchase agreement is a transaction in which one party (transferor) agrees to sell securities to another party (transferee) in return for cash (or securities), with a simultaneous agreement to repurchase the same securities at a specified price at a later date. The maturity of these transactions is generally ninety days or less. Repurchase agreements include master netting provisions that provide both counterparties the right to offset claims and apply securities held by them with respect to their obligations in the event of a default. Although the Company has the contractual right to offset claims, the Company's current positions do not meet the specific conditions for net presentation. Under repurchase agreements, the Company transfers collateral of U.S. government and government agency securities and receives cash. For repurchase agreements, the Company obtains cash in an amount equal to at least 95% of the fair value of the securities transferred. The agreements require additional collateral to be transferred when necessary and provide the counterparty the right to sell or re-pledge the securities transferred. The cash received from the repurchase program is typically invested in short-term investments or fixed maturities and is reported as an asset on the Company's Condensed Consolidated Balance Sheets. The Company accounts for the repurchase agreements as collateralized borrowings. The securities transferred under repurchase agreements are included in fixed maturities, AFS with the obligation to repurchase those securities recorded in other liabilities on the Company's Condensed Consolidated Balance Sheets. From time to time, the Company enters into reverse repurchase agreements where the Company purchases securities and simultaneously agrees to resell the same or substantially the same securities. The maturity of these transactions is generally within one year. The agreements require additional collateral to be transferred to the Company when necessary and the Company has the right to sell or re-pledge the securities received. The Company accounts for reverse repurchase agreements as collateralized financing. The receivable for reverse repurchase agreements is included within short-term investments in the Company's Condensed Consolidated Balance Sheets. Other Collateral Transactions As of September 30, 2019 and December 31, 2018 , the Company pledged collateral of $37 and $47 , respectively, of U.S. government securities and municipal securities or cash primarily related to certain bank loan participations committed to through a limited partnership agreement. These amounts also include collateral related to letters of credit. For disclosure of collateral in support of derivative transactions, refer to the Derivative Collateral Arrangements section in Note 7 - Derivatives of Notes to Condensed Consolidated Financial Statements. For disclosure of collateral in support of credit facilities, refer to Note 10 - Debt of Notes to Condensed Consolidated Financial Statements. Other Restricted Investments The Company is required by law to deposit securities with government agencies in certain states in which it conducts business. As of September 30, 2019 and December 31, 2018 , the fair value of securities on deposit was $ 2.4 billion and $2.2 billion , respectively. In addition, as of September 30, 2019 , the Company held fixed maturities and short-term investments of $548 and $0 , respectively in trust for the benefit of syndicate policyholders and other investments of $55 primarily consisting of overseas deposits in various countries with Lloyd's to support underwriting activities in those countries.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives Instruments	7 . DERIVATIVES The Company utilizes a variety of OTC, OTC-cleared and exchange traded derivative instruments as a part of its overall risk management strategy as well as to enter into replication transactions. Derivative instruments are used to manage risk associated with interest rate, equity market, credit spread, issuer default, price, and currency exchange rate risk or volatility. Replication transactions are used as an economical means to synthetically replicate the characteristics and performance of assets that are permissible investments under the Company’s investment policies. Strategies that Qualify for Hedge Accounting Some of the Company's derivatives satisfy hedge accounting requirements as outlined in Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to Consolidated Financial Statements, included in The Hartford’s 2018 Form 10-K Annual Report. Typically, these hedging instruments include interest rate swaps and, to a lesser extent, foreign currency swaps where the terms or expected cash flows of the hedged item closely match the terms of the swap. The interest rate swaps are typically used to manage interest rate duration of certain fixed maturity securities. The hedge strategies by hedge accounting designation include: Cash Flow Hedges Interest rate swaps are predominantly used to manage portfolio duration and better match cash receipts from assets with cash disbursements required to fund liabilities. These derivatives primarily convert interest receipts on floating-rate fixed maturity securities to fixed rates. The Company has also entered into interest rate swaps to convert the variable interest payments on the 3 month Libor + 2.125% junior subordinated debt to fixed interest payments. For further information, see the Junior Subordinated Debentures section within Note 13 - Debt of Notes to the Consolidated Financial Statements, included in The Hartford's 2018 Form 10-K Annual Report. Foreign currency swaps are used to convert non-U.S. denominated cash flows related to certain investment receipts to U.S. dollars in order to reduce cash flow fluctuations due to changes in currency rates. The Company also previously entered into forward starting swap agreements to hedge the interest rate exposure related to the future purchase of fixed-rate securities, primarily to hedge interest rate risk inherent in the assumptions used to price certain group benefits liabilities. Non-qualifying Strategies Derivative relationships that do not qualify for hedge accounting (“non-qualifying strategies”) primarily include hedging and replication strategies that utilize credit default swaps. In addition, hedges of interest rate, foreign currency and equity risk of certain fixed maturities and equities do not qualify for hedge accounting. The non-qualifying strategies include: Credit Contracts Credit default swaps are used to purchase credit protection on an individual entity or referenced index to economically hedge against default risk and credit-related changes in the value of fixed maturity securities. Credit default swaps are also used to assume credit risk related to an individual entity or referenced index as a part of replication transactions. These contracts require the Company to pay or receive a periodic fee in exchange for compensation from the counterparty should the referenced security issuers experience a credit event, as defined in the contract. The Company also enters into credit default swaps to terminate existing credit default swaps, thereby offsetting the changes in value of the original swap going forward. Interest Rate Swaps, Swaptions and Futures The Company uses interest rate swaps, swaptions and futures to manage interest rate duration between assets and liabilities. In addition, the Company enters into interest rate swaps to terminate existing swaps, thereby offsetting the changes in value of the original swap going forward. As of September 30, 2019 and December 31, 2018 , the notional amount of interest rate swaps in offsetting relationships was $7.6 billion and $7.1 billion , respectively. Foreign Currency Swaps and Forwards The Company enters into foreign currency swaps to convert the foreign currency exposures of certain non-U.S. dollar denominated fixed maturity investments to U.S. dollars. The Company may at times enter into foreign currency forwards to hedge non-U.S. dollar denominated cash or equity securities. Equity Index Options The Company enters into equity index options to hedge the impact of a decline in the equity markets on the investment portfolio. The Company also enters into call options on equity securities to generate additional return. Derivative Balance Sheet Classification For reporting purposes, the Company has elected to offset within assets or liabilities based upon the net of the fair value amounts, income accruals, and related cash collateral receivables and payables of OTC derivative instruments executed in a legal entity and with the same counterparty under a master netting agreement, which provides the Company with the legal right of offset. The following fair value amounts do not include income accruals or related cash collateral receivables and payables, which are netted with derivative fair value amounts to determine balance sheet presentation. The Company’s derivative instruments are held for risk management purposes, unless otherwise noted in the following table. The notional amount of derivative contracts represents the basis upon which pay or receive amounts are calculated and is presented in the table to quantify the volume of the Company’s derivative activity. Notional amounts are not necessarily reflective of credit risk. Derivative Balance Sheet Presentation Net Derivatives Asset Derivatives Liability Derivatives Notional Amount Fair Value Fair Value Fair Value Hedge Designation/ Derivative Type Sep. 30, 2019 Dec. 31, 2018 Sep. 30, 2019 Dec. 31, 2018 Sep. 30, 2019 Dec. 31, 2018 Sep. 30, 2019 Dec. 31, 2018 Cash flow hedges Interest rate swaps $ 2,040 $ 2,040 $ — $ 1 $ — $ 2 $ — $ (1 ) Foreign currency swaps 242 153 7 (6 ) 9 2 (2 ) (8 ) Total cash flow hedges 2,282 2,193 7 (5 ) 9 4 (2 ) (9 ) Non-qualifying strategies Interest rate contracts Interest rate swaps and futures 8,844 8,451 (70 ) (62 ) 2 8 (72 ) (70 ) Foreign exchange contracts Foreign currency swaps and forwards 454 287 1 (1 ) 1 — — (1 ) Credit contracts Credit derivatives that purchase credit protection 353 6 (2 ) — — — (2 ) — Credit derivatives that assume credit risk [1] 521 1,102 10 3 10 8 — (5 ) Credit derivatives in offsetting positions 32 41 — — 5 6 (5 ) (6 ) Equity contracts Equity index swaps and options 715 211 (5 ) 4 8 5 (13 ) (1 ) Total non-qualifying strategies 10,919 10,098 (66 ) (56 ) 26 27 (92 ) (83 ) Total cash flow hedges and non-qualifying strategies $ 13,201 $ 12,291 $ (59 ) $ (61 ) $ 35 $ 31 $ (94 ) $ (92 ) Balance Sheet Location Fixed maturities, available-for-sale $ 225 $ 153 $ — $ — $ — $ — $ — $ — Other investments 1,305 9,864 12 7 15 23 (3 ) (16 ) Other liabilities 11,671 2,274 (71 ) (68 ) 20 8 (91 ) (76 ) Total derivatives $ 13,201 $ 12,291 $ (59 ) $ (61 ) $ 35 $ 31 $ (94 ) $ (92 ) [1] The derivative instruments related to this strategy are held for other investment purposes. Offsetting of Derivative Assets/Liabilities The following tables present the gross fair value amounts, the amounts offset, and net position of derivative instruments eligible for offset in the Company's Condensed Consolidated Balance Sheets. Amounts offset include fair value amounts, income accruals and related cash collateral receivables and payables associated with derivative instruments that are traded under a common master netting agreement, as described in the preceding discussion. Also included in the tables are financial collateral receivables and payables, which are contractually permitted to be offset upon an event of default, although are disallowed for offsetting under U.S. GAAP. Offsetting Derivative Assets and Liabilities (i) (ii) (iii) = (i) - (ii) (iv) (v) = (iii) - (iv) Net Amounts Presented in the Statement of Financial Position Collateral Disallowed for Offset in the Statement of Financial Position Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Statement of Financial Position Derivative Assets [1] (Liabilities) [2] Accrued Interest and Cash Collateral (Received) [3] Pledged [2] Financial Collateral (Received) Pledged [4] Net Amount As of September 30, 2019 Other investments $ 35 $ 32 $ 12 $ (9 ) $ 1 $ 2 Other liabilities $ (94 ) $ (12 ) $ (71 ) $ (11 ) $ (73 ) $ (9 ) As of December 31, 2018 Other investments $ 31 $ 26 $ 7 $ (2 ) $ 2 $ 3 Other liabilities $ (92 ) $ (20 ) $ (68 ) $ (4 ) $ (65 ) $ (7 ) [1] Included in other investments in the Company's Condensed Consolidated Balance Sheets. [2] Included in other liabilities in the Company's Condensed Consolidated Balance Sheets and is limited to the net derivative payable associated with each counterparty. [3] Included in other investments in the Company's Condensed Consolidated Balance Sheets and is limited to the net derivative receivable associated with each counterparty. [4] Excludes collateral associated with exchange-traded derivative instruments. Cash Flow Hedges For derivative instruments that are designated and qualify as cash flow hedges, the gain or loss on the derivative is reported as a component of OCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. All components of each derivative’s gain or loss were included in the assessment of hedge effectiveness. Gain (Loss) Recognized in OCI Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Interest rate swaps $ — $ — $ 20 $ (16 ) Foreign currency swaps 10 — 14 1 Total $ 10 $ — $ 34 $ (15 ) Gain (Loss) Reclassified from AOCI into Income Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Interest rate swaps $ — $ 1 $ — $ — $ 7 $ — $ 2 $ 1 $ 1 $ 1 $ 24 $ — Foreign currency swaps — 1 — — — — — 2 — — — — Total $ — $ 2 $ — $ — $ 7 $ — $ 2 $ 3 $ 1 $ 1 $ 24 $ — Total amounts presented on the Condensed Consolidated Statement of Operations $ 89 $ 490 $ 67 $ 38 $ 444 $ 69 $ 332 $ 1,448 $ 194 $ 60 $ 1,323 $ 228 As of September 30, 2019 , the Company had $20 of before tax deferred net gains on derivative instruments recorded in AOCI that are expected to be reclassified to earnings during the next twelve months. This expectation is based on the anticipated interest payments on hedged investments in fixed maturity securities that will occur over the next twelve months, at which time the Company will recognize the deferred net gains (losses) as an adjustment to net investment income over the term of the investment cash flows. During the three and nine months ended September 30, 2019 and 2018 , the Company had no net reclassifications from AOCI to earnings resulting from the discontinuance of cash-flow hedges due to forecasted transactions that were no longer probable of occurring. Non-qualifying Strategies For non-qualifying strategies, including embedded derivatives that are required to be bifurcated from their host contracts and accounted for as derivatives, the gain or loss on the derivative is recognized currently in earnings within net realized capital gains (losses). Non-qualifying Strategies Recognized within Net Realized Capital Gains (Losses) Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Foreign exchange contracts Foreign currency swaps and forwards $ 2 $ 1 $ 2 $ 2 Other non-qualifying derivatives Interest rate contracts Interest rate swaps, swaptions, and futures (5 ) 1 (20 ) 7 Credit contracts Credit derivatives that purchase credit protection (1 ) — (1 ) — Credit derivatives that assume credit risk — 8 27 — Equity contracts Equity index swaps and options (1 ) (1 ) (5 ) (1 ) Total other non-qualifying derivatives (7 ) 8 1 6 Total [1] $ (5 ) $ 9 $ 3 $ 8 [1] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 5 - Fair Value Measurements of Notes to Condensed Consolidated Financial Statements. Credit Risk Assumed through Credit Derivatives The Company enters into credit default swaps that assume credit risk of a single entity or referenced index in order to synthetically replicate investment transactions that are permissible under the Company's investment policies. The Company will receive periodic payments based on an agreed upon rate and notional amount and will only make a payment if there is a credit event. A credit event payment will typically be equal to the notional value of the swap contract less the value of the referenced security issuer’s debt obligation after the occurrence of the credit event. A credit event is generally defined as a default on contractually obligated interest or principal payments or bankruptcy of the referenced entity. The credit default swaps in which the Company assumes credit risk primarily reference investment grade single corporate issuers and baskets, which include standard diversified portfolios of corporate and CMBS issuers. The diversified portfolios of corporate issuers are established within sector concentration limits and may be divided into tranches that possess different credit ratings. Credit Risk Assumed Derivatives by Type Underlying Referenced Credit Obligation(s) [1] Notional Amount [2] Fair Value Weighted Average Years to Maturity Type Average Credit Rating Offsetting Notional Amount [3] Offsetting Fair Value [3] As of September 30, 2019 Single name credit default swaps Investment grade risk exposure $ 121 $ 2 5 years Corporate Credit A- $ — $ — Basket credit default swaps [4] Investment grade risk exposure 400 8 5 years Corporate Credit BBB+ — — Investment grade risk exposure 1 — Less than 1 year CMBS Credit A- 1 — Below investment grade risk exposure 15 (5 ) Less than 1 year CMBS Credit CCC- 15 5 Total [5] $ 537 $ 5 $ 16 $ 5 As of December 31, 2018 Single name credit default swaps Investment grade risk exposure $ 169 $ 2 4 years Corporate Credit/ A $ — $ — Basket credit default swaps [4] Investment grade risk exposure 799 (1 ) 6 years Corporate Credit BBB+ — — Below investment grade risk exposure 125 2 5 years Corporate Credit B+ — — Investment grade risk exposure 11 — 5 years CMBS Credit A- 2 — Below investment grade risk exposure 19 (6 ) Less than 1 year CMBS Credit CCC 19 6 Total [5] $ 1,123 $ (3 ) $ 21 $ 6 [1] The average credit ratings are based on availability and are generally the midpoint of the available ratings among Moody’s, S&P and Fitch. If no rating is available from a rating agency, then an internally developed rating is used. [2] Notional amount is equal to the maximum potential future loss amount. These derivatives are governed by agreements and applicable law, which include collateral posting requirements. There is no additional specific collateral related to these contracts or recourse provisions included in the contracts to offset losses. [3] The Company has entered into offsetting credit default swaps to terminate certain existing credit default swaps, thereby offsetting the future changes in value of, or losses paid related to, the original swap. [4] Comprised of swaps of standard market indices of diversified portfolios of corporate and CMBS issuers referenced through credit default swaps. These swaps are subsequently valued based upon the observable standard market index. [5] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 5 - Fair Value Measurements of Notes to Condensed Consolidated Financial Statements. Derivative Collateral Arrangements The Company enters into various collateral arrangements in connection with its derivative instruments, which require both the pledging and accepting of collateral. As of September 30, 2019 and December 31, 2018 , the Company pledged cash collateral with a fair value of less than $1 and $4 , respectively, associated with derivative instruments. The collateral receivable has been recorded in other assets or other liabilities on the Company's Condensed Consolidated Balance Sheets as determined by the Company's election to offset on the balance sheet. As of September 30, 2019 and December 31, 2018 , the Company also pledged securities collateral associated with derivative instruments with a fair value of $81 and $67 , respectively, which have been included in fixed maturities on the Company's Condensed Consolidated Balance Sheets. The counterparties generally have the right to sell or re-pledge these securities. In addition, as of September 30, 2019 and December 31, 2018 , the Company has pledged initial margin of securities related to OTC-cleared and exchange traded derivatives with a fair value of $83 and $89 , respectively, which are included within fixed maturities on the Company's Condensed Consolidated Balance Sheets. As of September 30, 2019 and December 31, 2018 , the Company accepted cash collateral associated with derivative instruments of $17 and $9 , respectively, which was invested and recorded in the Company's Condensed Consolidated Balance Sheets in fixed maturities and short-term investments with corresponding amounts recorded in other investments or other liabilities as determined by the Company's election to offset on the balance sheet. The Company also accepted securities collateral as of September 30, 2019 and December 31, 2018 , with a fair value of $2 and $5 , respectively, which the Company has the right to sell or repledge. As of September 30, 2019 and December 31, 2018 , the Company had no repledged securities and no securities held as collateral have been sold. As of September 30, 2019 and December 31, 2018 , non-cash collateral accepted was held in separate custodial accounts and was not included in the Company’s Consolidated Balance Sheets .

Reserve for Unpaid Losses and L

Reserve for Unpaid Losses and Loss Adjustment Expenses	9 Months Ended
	Sep. 30, 2019
Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract]
Reserve for Unpaid Losses and Loss Adjustment Expenses	Property and Casualty Insurance Products Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the nine months ended September 30, 2019 2018 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 24,584 $ 23,775 Reinsurance and other recoverables 4,232 3,957 Beginning liabilities for unpaid losses and loss adjustment expenses, net 20,352 19,818 Navigators Group acquisition 2,001 — Provision for unpaid losses and loss adjustment expenses Current accident year 5,448 5,151 Prior accident year development (23 ) (139 ) Total provision for unpaid losses and loss adjustment expenses 5,425 5,012 Payments Current accident year (1,549 ) (1,647 ) Prior accident years (3,403 ) (3,166 ) Total payments (4,952 ) (4,813 ) Foreign currency adjustment (12 ) — Ending liabilities for unpaid losses and loss adjustment expenses, net 22,814 20,017 Reinsurance and other recoverables 5,083 3,780 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 27,897 $ 23,797 Unfavorable (Favorable) Prior Accident Year Development For the nine months ended September 30, 2019 2018 Workers’ compensation $ (90 ) $ (97 ) Workers’ compensation discount accretion 25 30 General liability 62 32 Marine 8 — Package business (32 ) (16 ) Commercial property (16 ) (10 ) Professional liability 32 (12 ) Bond (2 ) — Assumed Reinsurance 3 — Automobile liability - Commercial Lines 27 (15 ) Automobile liability - Personal Lines (28 ) (10 ) Homeowners — (20 ) Net asbestos reserves — — Net environmental reserves — — Catastrophes (27 ) (47 ) Uncollectible reinsurance — 22 Other reserve re-estimates, net 15 4 Total prior accident year development [1] $ (23 ) $ (139 ) [1] Included a prior accident year reserve increase of $68 related to the Navigators Group acquisition for the nine months ended September 30, 2019 consisting of $34 for general liability, $25 for professional liability, $10 for marine, $3 for assumed reinsurance and $2 for commercial auto liability, partially offset by a reserve decrease of $6 for commercial property. Re-estimates of prior accident year reserves for the nine months ended September 30, 2019 Workers’ compensation reserves were reduced, principally in small commercial driven by lower than previously estimated claim severity for the 2014 through 2017 accident years and, to a lesser extent, in national accounts due to lower estimated claim severity, primarily for accident years 2013 and prior. General liability reserves were increased, primarily due to reserve increases in small commercial for accident years 2017 and 2018 due to higher frequency of high-severity bodily injury claims, reserve increases in middle and large commercial for accident years 2015 to 2018 due to higher estimated severity, as well as increased estimated severity on the acquired Navigators book of business related to U.S. construction, premises liability, products liability and excess casualty, mostly related to accident years 2014 to 2018. In addition, an increase in reserves for mass torts was offset by a decrease in reserves for extra contractual liability claims. Marine reserves were increased, principally related to pollution exposure from the 1980s and 1990s related to the Navigators Group book of business. Package business reserves were decreased, primarily due to favorable emergence on property claims related to accident years 2016 through 2018 and due to favorable development of allocated loss adjustment expenses on general liability claims for 2017 and prior accident years. Commercial property reserves were decreased, principally due to favorable emergence of reported losses, including on the acquired Navigators Group book of business related to offshore energy in accident years 2017 to 2018 and construction engineering across accident years 2015 to 2018. Professional liability reserves were increased, primarily due to large loss activity, including wrongful termination and discrimination claims, in accident years 2017 and 2018 and increased estimated frequency and severity of directors’ and officers’ reserves on the Navigators Group book of business, principally for the 2014 to 2018 accident years. Automobile liability reserves were decreased in Personal Lines due to the emergence of lower estimated severity in automobile liability for accident year 2017 and were increased in Commercial Lines due to higher estimated severity on national accounts, principally in accident years 2017 and 2018. Catastrophe reserves were reduced, primarily as a result of lower estimated net losses from 2017 hurricanes Harvey and Irma. In September, 2019, PG&E Corporation and Pacific Gas and Electric Company (together, “PG&E”) agreed in principle to an $11 billion settlement with insurers representing approximately 85 percent of insurance subrogation claims to resolve all such claims arising from the 2017 Northern California wildfires and 2018 Camp wildfire. The settlement is subject to approval of the bankruptcy court overseeing PG&E's Chapter 11 bankruptcy filing. The settlement is also subject to the confirmation by the bankruptcy court of a chapter 11 plan of reorganization (a "Plan") which implements the terms of the settlement. If a Plan is approved, certain of the Company’s insurance subsidiaries would be entitled to settlement payments. Based on reserve estimates submitted with the subrogation request, the amount our subsidiaries could collect from PG&E, if any, would be approximately $325 but could be more or less than that amount depending on how the Company’s ultimate paid claims subject to subrogation compare to other insurers’ ultimate paid claims subject to subrogation. Approval of the Plan and amount of the Company’s ultimate subrogation recoveries from PG&E are subject to uncertainty. This includes, among other things, uncertainty regarding liabilities for current or future wildfires caused or allegedly caused by PG&E, the value of recoveries by other creditors and PG&E’s ability to secure funds to pay its creditors. Given the uncertainty, the Company has not recognized a benefit from potential subrogation from PG&E and will evaluate in future periods when more information becomes known. The first $116 of subrogation recoveries would be offset by a $116 reduction in reinsurance recoverables resulting in no net benefit to income. No changes have been made in 2019 to estimated incurred losses from the 2017 or 2018 wildfires. Re-estimates of prior accident year reserves for the nine months ended September 30, 2018 Workers’ compensation reserves were reduced in small commercial and middle market, primarily for accident years 2012 to 2015, as both claim frequency and medical claim severity have emerged favorably compared to previous reserve estimates. General liability reserves were increased, primarily due to an increase in reserves for higher hazard general liability exposures in middle market for accident years 2009 to 2017, partially offset by a decrease in reserves for other lines within middle market, including premises and operations, umbrella and products liability, principally for accident years 2015 and prior. Contributing to the increase in reserves for higher hazard general liability exposures was an increase in large losses and, in more recent accident years, an increase in claim frequency. Contributing to the reduction in reserves for other middle market lines were more favorable outcomes due to initiatives to reduce legal expenses. In addition, reserve increases for claims with lead paint exposure were offset by reserve decreases for other mass torts and extra-contractual liability claims. Package business reserves were reduced, primarily due to lower reserve estimates for both liability and property for accident years 2010 and prior, including a recovery of loss adjustment expenses for the 2005 accident year. Commercial property reserves were r educed, driven by an increase in estimated reinsurance recoverables on middle market property losses from the 2017 accident year. Professional liability reserves were reduced, principally for accident years 2014 and prior, for directors and officers liability claims principally due to a number of older claims closing with limited or no payment. Automobile liability reserves were reduced, primarily driven by reduced estimates of loss adjustment expenses in small commercial for recent accident years and favorable development in personal automobile liability for accident years 2014 to 2017, principally due to lower severity, including with uninsured and underinsured motorist claims. Homeowners reserves were reduced, primarily in accident years 2013 to 2017, driven by lower than expected severity across multiple perils. Catastrophe reserves were r educed, primarily as a result of lower estimated net losses from 2017 catastrophes, principally related to hurricanes Harvey and Irma. Before reinsurance, estimated losses for 2017 catastrophe events decreased by $133 in the nine months ended September 30, 2018, resulting in a decrease in reinsurance recoverables of $90 as the Company no longer expects to recover under the 2017 Property Aggregate reinsurance treaty as aggregate ultimate losses for 2017 catastrophe events are now projected to be less than $850 . Uncollectible reinsurance reserves were increased due to lower anticipated recoveries related to older accident years. Group Life, Disability and Accident Products Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the nine months ended September 30, 2019 2018 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 8,445 $ 8,512 Reinsurance recoverables 239 209 Beginning liabilities for unpaid losses and loss adjustment expenses, net 8,206 8,303 Aetna U.S. group life and disability business acquisition — 42 Provision for unpaid losses and loss adjustment expenses Current incurral year 3,351 3,423 Prior year's discount accretion 169 175 Prior incurral year development [1] (321 ) (284 ) Total provision for unpaid losses and loss adjustment expenses [2] 3,199 3,314 Payments Current incurral year (1,603 ) (1,659 ) Prior incurral years (1,743 ) (1,741 ) Total payments (3,346 ) (3,400 ) Ending liabilities for unpaid losses and loss adjustment expenses, net 8,059 8,259 Reinsurance recoverables 231 241 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 8,290 $ 8,500 [1] Prior incurral year development represents the change in estimated ultimate incurred losses and loss adjustment expenses for prior incurral years on a discounted basis. [2] Includes unallocated loss adjustment expenses of $130 and $131 for the nine months ended September 30, 2019 and 2018 , respectively, that are recorded in insurance operating costs and other expenses in the Condensed Consolidated Statements of Operations. Re-estimates of prior incurral years reserves for the nine months ended September 30, 2019 Group disability- Prior period reserve estimates decreased by approximately $ 265 largely driven by group long-term disability claim recoveries higher than prior reserve assumptions and claim incidence lower than prior assumptions. Long-term disability ("LTD") reserve assumptions were also updated based partially on these more recent favorable trends. New York Paid Family Leave also experienced favorable claim emergence and refund compared to year-end estimates. Group life and accident (including group life premium waiver)- Prior period reserve estimates decreased by approximately $ 45 largely driven by lower-than-previously expected claim incidence in group life Premium Waiver. Re-estimates of prior incurral years reserves for the nine months ended September 30, 2018 Group disability- Prior period reserve estimates decreased by approximately $195 l argely driven by group long-term disability claim recoveries higher than prior reserve assumptions and claim incidence lower than prior assumptions. Short-term disability has also experienced favorable claim recoveries. Group life and accident (including group life premium waiver)- Prior period reserve estimates decreased by approximately $85 largely driven by lower-than-previously expected claim incidence inclusive of group life, group life premium waiver, and group accidental death & dismemberment. 9 . RESERVE FOR FUTURE POLICY BENEFITS Changes in Reserves for Future Policy Benefits [1] Liability balance, as of January 1, 2019 $ 642 Incurred 63 Paid (77 ) Change in unrealized investment gains and losses 17 Liability balance, as of September 30, 2019 $ 645 Reinsurance recoverable asset, as of January 1, 2019 $ 27 Incurred 2 Paid — Reinsurance recoverable asset, as of September 30, 2019 $ 29 Liability balance, as of January 1, 2018 $ 713 Incurred 10 Paid (25 ) Change in unrealized investment gains and losses (42 ) Liability balance, as of September 30, 2018 $ 656 Reinsurance recoverable asset, as of January 1, 2018 $ 26 Incurred 10 Paid (1 ) Reinsurance recoverable asset, as of September 30, 2018 $ 35 [1]Reserves for future policy benefits includes paid-up life insurance and whole-life policies resulting from conversion from group life policies included within the Group Benefits segment and reserves for run-off structured settlement and terminal funding agreement liabilities which are in the Corporate category.

Reserve for Future Policy Benef

Reserve for Future Policy Benefits	9 Months Ended
	Sep. 30, 2019
Insurance Loss Reserves [Abstract]
Reserve for Future Policy Benefits	Property and Casualty Insurance Products Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the nine months ended September 30, 2019 2018 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 24,584 $ 23,775 Reinsurance and other recoverables 4,232 3,957 Beginning liabilities for unpaid losses and loss adjustment expenses, net 20,352 19,818 Navigators Group acquisition 2,001 — Provision for unpaid losses and loss adjustment expenses Current accident year 5,448 5,151 Prior accident year development (23 ) (139 ) Total provision for unpaid losses and loss adjustment expenses 5,425 5,012 Payments Current accident year (1,549 ) (1,647 ) Prior accident years (3,403 ) (3,166 ) Total payments (4,952 ) (4,813 ) Foreign currency adjustment (12 ) — Ending liabilities for unpaid losses and loss adjustment expenses, net 22,814 20,017 Reinsurance and other recoverables 5,083 3,780 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 27,897 $ 23,797 Unfavorable (Favorable) Prior Accident Year Development For the nine months ended September 30, 2019 2018 Workers’ compensation $ (90 ) $ (97 ) Workers’ compensation discount accretion 25 30 General liability 62 32 Marine 8 — Package business (32 ) (16 ) Commercial property (16 ) (10 ) Professional liability 32 (12 ) Bond (2 ) — Assumed Reinsurance 3 — Automobile liability - Commercial Lines 27 (15 ) Automobile liability - Personal Lines (28 ) (10 ) Homeowners — (20 ) Net asbestos reserves — — Net environmental reserves — — Catastrophes (27 ) (47 ) Uncollectible reinsurance — 22 Other reserve re-estimates, net 15 4 Total prior accident year development [1] $ (23 ) $ (139 ) [1] Included a prior accident year reserve increase of $68 related to the Navigators Group acquisition for the nine months ended September 30, 2019 consisting of $34 for general liability, $25 for professional liability, $10 for marine, $3 for assumed reinsurance and $2 for commercial auto liability, partially offset by a reserve decrease of $6 for commercial property. Re-estimates of prior accident year reserves for the nine months ended September 30, 2019 Workers’ compensation reserves were reduced, principally in small commercial driven by lower than previously estimated claim severity for the 2014 through 2017 accident years and, to a lesser extent, in national accounts due to lower estimated claim severity, primarily for accident years 2013 and prior. General liability reserves were increased, primarily due to reserve increases in small commercial for accident years 2017 and 2018 due to higher frequency of high-severity bodily injury claims, reserve increases in middle and large commercial for accident years 2015 to 2018 due to higher estimated severity, as well as increased estimated severity on the acquired Navigators book of business related to U.S. construction, premises liability, products liability and excess casualty, mostly related to accident years 2014 to 2018. In addition, an increase in reserves for mass torts was offset by a decrease in reserves for extra contractual liability claims. Marine reserves were increased, principally related to pollution exposure from the 1980s and 1990s related to the Navigators Group book of business. Package business reserves were decreased, primarily due to favorable emergence on property claims related to accident years 2016 through 2018 and due to favorable development of allocated loss adjustment expenses on general liability claims for 2017 and prior accident years. Commercial property reserves were decreased, principally due to favorable emergence of reported losses, including on the acquired Navigators Group book of business related to offshore energy in accident years 2017 to 2018 and construction engineering across accident years 2015 to 2018. Professional liability reserves were increased, primarily due to large loss activity, including wrongful termination and discrimination claims, in accident years 2017 and 2018 and increased estimated frequency and severity of directors’ and officers’ reserves on the Navigators Group book of business, principally for the 2014 to 2018 accident years. Automobile liability reserves were decreased in Personal Lines due to the emergence of lower estimated severity in automobile liability for accident year 2017 and were increased in Commercial Lines due to higher estimated severity on national accounts, principally in accident years 2017 and 2018. Catastrophe reserves were reduced, primarily as a result of lower estimated net losses from 2017 hurricanes Harvey and Irma. In September, 2019, PG&E Corporation and Pacific Gas and Electric Company (together, “PG&E”) agreed in principle to an $11 billion settlement with insurers representing approximately 85 percent of insurance subrogation claims to resolve all such claims arising from the 2017 Northern California wildfires and 2018 Camp wildfire. The settlement is subject to approval of the bankruptcy court overseeing PG&E's Chapter 11 bankruptcy filing. The settlement is also subject to the confirmation by the bankruptcy court of a chapter 11 plan of reorganization (a "Plan") which implements the terms of the settlement. If a Plan is approved, certain of the Company’s insurance subsidiaries would be entitled to settlement payments. Based on reserve estimates submitted with the subrogation request, the amount our subsidiaries could collect from PG&E, if any, would be approximately $325 but could be more or less than that amount depending on how the Company’s ultimate paid claims subject to subrogation compare to other insurers’ ultimate paid claims subject to subrogation. Approval of the Plan and amount of the Company’s ultimate subrogation recoveries from PG&E are subject to uncertainty. This includes, among other things, uncertainty regarding liabilities for current or future wildfires caused or allegedly caused by PG&E, the value of recoveries by other creditors and PG&E’s ability to secure funds to pay its creditors. Given the uncertainty, the Company has not recognized a benefit from potential subrogation from PG&E and will evaluate in future periods when more information becomes known. The first $116 of subrogation recoveries would be offset by a $116 reduction in reinsurance recoverables resulting in no net benefit to income. No changes have been made in 2019 to estimated incurred losses from the 2017 or 2018 wildfires. Re-estimates of prior accident year reserves for the nine months ended September 30, 2018 Workers’ compensation reserves were reduced in small commercial and middle market, primarily for accident years 2012 to 2015, as both claim frequency and medical claim severity have emerged favorably compared to previous reserve estimates. General liability reserves were increased, primarily due to an increase in reserves for higher hazard general liability exposures in middle market for accident years 2009 to 2017, partially offset by a decrease in reserves for other lines within middle market, including premises and operations, umbrella and products liability, principally for accident years 2015 and prior. Contributing to the increase in reserves for higher hazard general liability exposures was an increase in large losses and, in more recent accident years, an increase in claim frequency. Contributing to the reduction in reserves for other middle market lines were more favorable outcomes due to initiatives to reduce legal expenses. In addition, reserve increases for claims with lead paint exposure were offset by reserve decreases for other mass torts and extra-contractual liability claims. Package business reserves were reduced, primarily due to lower reserve estimates for both liability and property for accident years 2010 and prior, including a recovery of loss adjustment expenses for the 2005 accident year. Commercial property reserves were r educed, driven by an increase in estimated reinsurance recoverables on middle market property losses from the 2017 accident year. Professional liability reserves were reduced, principally for accident years 2014 and prior, for directors and officers liability claims principally due to a number of older claims closing with limited or no payment. Automobile liability reserves were reduced, primarily driven by reduced estimates of loss adjustment expenses in small commercial for recent accident years and favorable development in personal automobile liability for accident years 2014 to 2017, principally due to lower severity, including with uninsured and underinsured motorist claims. Homeowners reserves were reduced, primarily in accident years 2013 to 2017, driven by lower than expected severity across multiple perils. Catastrophe reserves were r educed, primarily as a result of lower estimated net losses from 2017 catastrophes, principally related to hurricanes Harvey and Irma. Before reinsurance, estimated losses for 2017 catastrophe events decreased by $133 in the nine months ended September 30, 2018, resulting in a decrease in reinsurance recoverables of $90 as the Company no longer expects to recover under the 2017 Property Aggregate reinsurance treaty as aggregate ultimate losses for 2017 catastrophe events are now projected to be less than $850 . Uncollectible reinsurance reserves were increased due to lower anticipated recoveries related to older accident years. Group Life, Disability and Accident Products Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the nine months ended September 30, 2019 2018 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 8,445 $ 8,512 Reinsurance recoverables 239 209 Beginning liabilities for unpaid losses and loss adjustment expenses, net 8,206 8,303 Aetna U.S. group life and disability business acquisition — 42 Provision for unpaid losses and loss adjustment expenses Current incurral year 3,351 3,423 Prior year's discount accretion 169 175 Prior incurral year development [1] (321 ) (284 ) Total provision for unpaid losses and loss adjustment expenses [2] 3,199 3,314 Payments Current incurral year (1,603 ) (1,659 ) Prior incurral years (1,743 ) (1,741 ) Total payments (3,346 ) (3,400 ) Ending liabilities for unpaid losses and loss adjustment expenses, net 8,059 8,259 Reinsurance recoverables 231 241 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 8,290 $ 8,500 [1] Prior incurral year development represents the change in estimated ultimate incurred losses and loss adjustment expenses for prior incurral years on a discounted basis. [2] Includes unallocated loss adjustment expenses of $130 and $131 for the nine months ended September 30, 2019 and 2018 , respectively, that are recorded in insurance operating costs and other expenses in the Condensed Consolidated Statements of Operations. Re-estimates of prior incurral years reserves for the nine months ended September 30, 2019 Group disability- Prior period reserve estimates decreased by approximately $ 265 largely driven by group long-term disability claim recoveries higher than prior reserve assumptions and claim incidence lower than prior assumptions. Long-term disability ("LTD") reserve assumptions were also updated based partially on these more recent favorable trends. New York Paid Family Leave also experienced favorable claim emergence and refund compared to year-end estimates. Group life and accident (including group life premium waiver)- Prior period reserve estimates decreased by approximately $ 45 largely driven by lower-than-previously expected claim incidence in group life Premium Waiver. Re-estimates of prior incurral years reserves for the nine months ended September 30, 2018 Group disability- Prior period reserve estimates decreased by approximately $195 l argely driven by group long-term disability claim recoveries higher than prior reserve assumptions and claim incidence lower than prior assumptions. Short-term disability has also experienced favorable claim recoveries. Group life and accident (including group life premium waiver)- Prior period reserve estimates decreased by approximately $85 largely driven by lower-than-previously expected claim incidence inclusive of group life, group life premium waiver, and group accidental death & dismemberment. 9 . RESERVE FOR FUTURE POLICY BENEFITS Changes in Reserves for Future Policy Benefits [1] Liability balance, as of January 1, 2019 $ 642 Incurred 63 Paid (77 ) Change in unrealized investment gains and losses 17 Liability balance, as of September 30, 2019 $ 645 Reinsurance recoverable asset, as of January 1, 2019 $ 27 Incurred 2 Paid — Reinsurance recoverable asset, as of September 30, 2019 $ 29 Liability balance, as of January 1, 2018 $ 713 Incurred 10 Paid (25 ) Change in unrealized investment gains and losses (42 ) Liability balance, as of September 30, 2018 $ 656 Reinsurance recoverable asset, as of January 1, 2018 $ 26 Incurred 10 Paid (1 ) Reinsurance recoverable asset, as of September 30, 2018 $ 35 [1]Reserves for future policy benefits includes paid-up life insurance and whole-life policies resulting from conversion from group life policies included within the Group Benefits segment and reserves for run-off structured settlement and terminal funding agreement liabilities which are in the Corporate category.

Debt

Debt	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Debt	10 . DEBT Shelf Registrations On May 17, 2019, the Company filed with the Securities and Exchange Commission (the “SEC”) an automatic shelf registration statement (Registration No. 333-231592) for the potential offering and sale of debt and equity securities. The registration statement allows for the following types of securities to be offered: debt securities, junior subordinated debt securities, guarantees, preferred stock, common stock, depositary shares, warrants, stock purchase contracts, and stock purchase units. In that The Hartford is a well-known seasoned issuer, as defined in Rule 405 under the Securities Act of 1933, the registration statement went effective immediately upon filing and The Hartford may offer and sell an unlimited amount of securities under the registration statement during the three -year life of the registration statement. Senior Notes On January 15, 2019, The Hartford repaid at maturity the $413 principal amount of its 6.0% senior notes. In the Navigators Group acquisition, the Company assumed $265 par value 5.75% Senior notes due on October 15, 2023 with a fair value of $284 as of the acquisition date. On August 19, 2019, The Hartford issued $600 of 2.8% senior notes (“2.8% Notes”) due August 19, 2029 and $800 of 3.6% senior notes (“3.6% Notes”) due August 19, 2049 for net proceeds of approximately $1.38 billion, after deducting underwriting discounts and expenses. Under both senior note issuances interest is payable semi-annually in arrears on August 19 and February 19, commencing February 19, 2020. The Hartford, at its option, can redeem the 2.8% Notes and the 3.6% Notes at any time, in whole or part, at a redemption price equal to the greater of 100% of the principal amount being redeemed or a make-whole amount based on a comparable maturity US Treasury plus a basis point spread, plus any accrued and unpaid interest, except the make-whole amount is not applicable within the final three months of maturity for the 2.8% Notes and the final six months of maturity for the 3.6% Notes. The spread over the comparable maturity US Treasury for determining the make-whole amount is 20 and 25 basis points for the 2.8% Notes and 3.6% Notes, respectively. After receiving proceeds from the issuance of the 2.8% Notes and 3.6% Notes, in third quarter 2019, The Hartford repaid $265 of 5.75% senior notes due 2023 that had been assumed in the Navigators Group acquisition, and its $800 of 5.125% senior notes due 2022 of the Hartford Financial Services Group, Inc., and recognized a loss on extinguishment of debt of $90 . Lloyd's Letter of Credit Facilities As a result of the acquisition of Navigators Group, The Hartford assumed three existing letter of credit facility agreements: the Club Facility, the Bilateral Facility, and the Australian Dollar Facility. Letters of credit under the Club and Bilateral Facilities are used to provide a portion of the capital requirements at Lloyd's. As of September 30, 2019, uncollateralized letters of credit with an aggregate face amount of $165 and £60 million were outstanding under the Club Facility and $8 was outstanding under the Bilateral Facility. The Bilateral Facility has unused capacity of $17 for issuance of additional letters of credit. Among other covenants, the Club Facility and Bilateral Facility contain financial covenants regarding tangible net worth and Funds at Lloyd's ("FAL"). As of September 30, 2019, Navigators Group was in compliance with all financial covenants. As of September 30, 2019, letters of credit in the amount of 24 million Australian Dollars were outstanding with 26

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	11 . INCOME TAXES Income Tax Expense Income Tax Rate Reconciliation Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Tax provision at U.S. federal statutory rate $ 138 $ 112 $ 396 $ 333 Tax-exempt interest (14 ) (16 ) (43 ) (50 ) Dividends received deduction ("DRD") (3 ) — (5 ) — Executive compensation — 1 5 8 Stock-based compensation (3 ) (3 ) (7 ) (5 ) Tax Reform — 11 — 13 Other — (2 ) 1 (2 ) Provision for income taxes $ 118 $ 103 $ 347 $ 297 Uncertain Tax Positions Rollforward of Unrecognized Tax Benefits Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Balance, beginning of period $ 14 $ 9 $ 14 $ 9 Gross increases - tax positions in prior period — 5 — 5 Gross decreases - tax positions in prior period — — — — Balance, end of period $ 14 $ 14 $ 14 $ 14 The entire amount of unrecognized tax benefits, if recognized, would affect the effective tax rate in the period of the release. Other Tax Matters In July 2019, the Company received a $421 refund of alternative minimum tax (AMT) credits. As of September 30, 2019 the Company had remaining AMT credit carryovers of $ 413 which are reflected as a current income tax receivable within other assets in the accompanying Condensed Consolidated Balance Sheets. AMT credits may be used to offset a regular tax liability for any taxable year beginning after December 31, 2017, and are refundable at an amount equal to 50 percent of the excess of the minimum tax credit for the taxable year over the amount of credit allowable for the year against regular tax liability. Any remaining credits not used against regular tax liability are refundable in the 2021 tax year to be realized in 2022. For the three and nine months ended September 30, 2019, the Company offset $2 and $8 of regular tax liability with AMT credits. The Company had net operating loss (NOL) carryforwards in the United States and the United Kingdom for which future tax benefits of $225 and $1 have been recognized and are included in the Condensed Consolidated Balance Sheet as a component of the net deferred tax asset. The Company also has NOLs in other foreign jurisdictions for which a full valuation allowance has been established. Although the Company projects there will be sufficient future taxable income to fully recover the remainder of the NOL carryover for which benefits have been recognized, the Company's estimate of the likely realization may change over time. The U.S. NOL carryovers, if unused, would expire between 2026 and 2036. The foreign NOLs do not expire. The federal audits for the Company have been completed through 2013, and the Company is not currently under federal examination for any open years. Navigators Group is currently under federal audit for the 2016 year and has completed examinations through 2015. Management believes that adequate provision has been made in the Company's Condensed Consolidated Financial Statements for any potential adjustments that may result from tax examinations and other tax-related matters for all open tax years. The Company classifies interest and penalties (if applicable) as income tax expense or benefit in the condensed consolidated financial statements. The Company recognized net interest income of $1 for the three and nine months ended September 30, 2019 related to the AMT refund and $0 for the three and nine months ended September 30, 2018 . The Company had no interest payable as of September 30, 2019 and 2018 . The Company does not believe it would be subject to any penalties in any open tax years and, therefore, has not recorded any accrual for penalties.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	12 . COMMITMENTS AND CONTINGENCIES Management evaluates each contingent matter separately. A loss is recorded if probable and reasonably estimable. Management establishes liabilities for these contingencies at its “best estimate,” or, if no one number within the range of possible losses is more probable than any other, the Company records an estimated liability at the low end of the range of losses. Litigation The Hartford is involved in claims litigation arising in the ordinary course of business, both as a liability insurer defending or providing indemnity for third-party claims brought against insureds and as an insurer defending coverage claims brought against it, including claims alleging bad faith in the handling of insurance claims or other allegedly unfair or improper claims practices. The Hartford accounts for such activity through the establishment of unpaid loss and loss adjustment expense reserves. Subject to the uncertainties in the following discussion under the caption “Run-off Asbestos and Environmental Claims,” management expects that the ultimate liability, if any, with respect to such ordinary-course claims litigation, after consideration of provisions made for potential losses and costs of defense, will not be material to the consolidated financial condition, results of operations or cash flows of The Hartford. The Hartford is also involved in other kinds of legal actions, some of which assert claims for substantial amounts. These actions include lawsuits seeking certification of a state or national class alleging improper business practices, including, for example, underpayment of claims or improper underwriting practices, as well as individual lawsuits in which punitive damages may be sought. Management expects that the ultimate liability, if any, with respect to such lawsuits, after consideration of provisions made for estimated losses, will not be material to the consolidated financial condition of The Hartford. Nonetheless, given the large or indeterminate amounts sought in certain of these actions, and the inherent unpredictability of litigation, the outcome in certain matters could, from time to time, have a material adverse effect on the Company's results of operations or cash flows in particular quarterly or annual periods. Run-off Asbestos and Environmental Claims –The Company continues to receive asbestos and environmental ("A&E") claims. Asbestos claims relate primarily to bodily injuries asserted by people who came in contact with asbestos or products containing asbestos. Environmental claims relate primarily to pollution and related clean-up costs. The vast majority of the Company's exposure to A&E relates to policy coverages provided prior to 1986, reported within the P&C Other Operations segment (“Runoff A&E”). In addition, since 1986, the Company has written asbestos and environmental exposures under general liability policies and pollution liability under homeowners policies, which are reported in the Commercial Lines and Personal Lines segments. Prior to 1986, the Company wrote several different categories of insurance contracts that may cover A&E claims. First, the Company wrote primary policies providing the first layer of coverage in an insured’s liability program. Second, the Company wrote excess and umbrella policies providing higher layers of coverage for losses that exhaust the limits of underlying coverage. Third, the Company acted as a reinsurer assuming a portion of those risks assumed by other insurers writing primary, excess, umbrella and reinsurance coverages. Significant uncertainty limits the ability of insurers and reinsurers to estimate the ultimate reserves necessary for unpaid gross losses and expenses related to environmental and particularly asbestos claims. The degree of variability of gross reserve estimates for these exposures is significantly greater than for other more traditional exposures. In the case of the reserves for asbestos exposures, factors contributing to the high degree of uncertainty include inadequate loss development patterns, plaintiffs’ expanding theories of liability, the risks inherent in major litigation, and inconsistent emerging legal doctrines. Furthermore, over time, insurers, including the Company, have experienced significant changes in the rate at which asbestos claims are brought, the claims experience of particular insureds, and the value of claims, making predictions of future exposure from past experience uncertain. Plaintiffs and insureds also have sought to use bankruptcy proceedings, including “pre-packaged” bankruptcies, to accelerate and increase loss payments by insurers. In addition, some policyholders have asserted new classes of claims for coverages to which an aggregate limit of liability may not apply. Further uncertainties include insolvencies of other carriers and unanticipated developments pertaining to the Company’s ability to recover reinsurance for A&E claims. Management believes these issues are not likely to be resolved in the near future. In the case of the reserves for environmental exposures, factors contributing to the high degree of uncertainty include expanding theories of liability and damages, the risks inherent in major litigation, inconsistent decisions concerning the existence and scope of coverage for environmental claims, and uncertainty as to the monetary amount being sought by the claimant from the insured. The reporting pattern for assumed reinsurance claims, including those related to A&E claims, is much longer than for direct claims. In many instances, it takes months or years to determine that the policyholder’s own obligations have been met and how the reinsurance in question may apply to such claims. The delay in reporting reinsurance claims and exposures adds to the uncertainty of estimating the related reserves. It is also not possible to predict changes in the legal and legislative environment and their effect on the future development of A&E claims. Given the factors described above, the Company believes the actuarial tools and other techniques it employs to estimate the ultimate cost of claims for more traditional kinds of insurance exposure are less precise in estimating reserves for A&E exposures. For this reason, the Company principally relies on exposure-based analysis to estimate the ultimate costs of these claims, both gross and net of reinsurance, and regularly evaluates new account information in assessing its potential A&E exposures. The Company supplements this exposure-based analysis with evaluations of the Company’s historical direct net loss and expense paid and reported experience, and net loss and expense paid and reported experience by calendar and/or report year, to assess any emerging trends, fluctuations or characteristics suggested by the aggregate paid and reported activity. While the Company believes that its current A&E reserves are appropriate, significant uncertainties limit the ability of insurers and reinsurers to estimate the ultimate reserves necessary for unpaid losses and related expenses. The ultimate liabilities, thus, could exceed the currently recorded reserves, and any such additional liability, while not estimable now, could be material to The Hartford’s consolidated operating results and liquidity. For its Run-off A&E, as of September 30, 2019 , the Company reported $910 of net asbestos reserves and $133 of net environmental reserves . While the Company believes that its current Run-off A&E reserves are appropriate, significant uncertainties limit our ability to estimate the ultimate reserves necessary for unpaid losses and related expenses. The ultimate liabilities, thus, could exceed the currently recorded reserves, and any such additional liability, while not reasonably estimable now, could be material to The Hartford's consolidated operating results and liquidity. Effective December 31, 2016, the Company entered into an A&E adverse development cover ("ADC") reinsurance agreement with NICO to reduce uncertainty about potential adverse development of A&E reserves. Under the ADC, the Company paid a reinsurance premium of $650 for NICO to assume adverse net loss and allocated loss adjustment expense reserve development up to $1.5 billion above the Company’s existing net A&E reserves as of December 31, 2016 of approximately $1.7 billion . The $650 reinsurance premium was placed in a collateral trust account as security for NICO’s claim payment obligations to the Company. Under retroactive reinsurance accounting, net adverse A&E reserve development after December 31, 2016 will result in an offsetting reinsurance recoverable up to the $1.5 billion limit. Cumulative ceded losses up to the $650 reinsurance premium paid are recognized as a dollar-for-dollar offset to gross losses incurred. Cumulative ceded losses exceeding the $650 reinsurance premium paid would result in a deferred gain. The deferred gain would be recognized over the claim settlement period in the proportion of the amount of cumulative ceded losses collected from the reinsurer to the estimated ultimate reinsurance recoveries. Consequently, until periods when the deferred gain is recognized as a benefit to earnings, cumulative adverse development of A&E claims after December 31, 2016 in excess of $650 may result in significant charges against earnings. Furthermore, cumulative adverse development of A&E claims could ultimately exceed the $1.5 billion treaty limit in which case any adverse development in excess of the treaty limit would be absorbed as a charge to earnings by the Company. In these scenarios, the effect of these charges could be material to the Company’s consolidated operating results and liquidity. As of September 30, 2019 , the Company has incurred $523 in cumulative adverse development on A&E reserves that have been ceded under the ADC treaty with NICO, leaving approximately $ 977 of coverage available for future adverse net reserve development, if any. Derivative Commitments Certain of the Company’s derivative agreements contain provisions that are tied to the financial strength ratings, as set by nationally recognized statistical agencies, of the individual legal entity that entered into the derivative agreement. If the legal entity’s financial strength were to fall below certain ratings, the counterparties to the derivative agreements could demand immediate and ongoing full collateralization and in certain instances enable the counterparties to terminate the agreements and demand immediate settlement of all outstanding derivative positions traded under each impacted bilateral agreement. The settlement amount is determined by netting the derivative positions transacted under each agreement. If the termination rights were to be exercised by the counterparties, it could impact the legal entity’s ability to conduct hedging activities by increasing the associated costs and decreasing the willingness of counterparties to transact with the legal entity. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a net liability position as of September 30, 2019 was $81 . For this $81 , the legal entities have posted collateral of $80 in the normal course of business. Based on derivative market values as of September 30, 2019 , a downgrade of one level below the current financial strength ratings by either Moody's or S&P would not require additional assets to be posted as collateral. Based on derivative market values as of September 30, 2019 , a downgrade of two levels below the current financial strength ratings by either Moody's or S&P would require an additional $8 of assets to be posted as collateral. These collateral amounts could change as derivative market values change, as a result of changes in our hedging activities or to the extent changes in contractual terms are negotiated. The nature of the additional collateral that we would post, if required, would be primarily in the form of U.S. Treasury bills, U.S. Treasury notes and government agency securities.

Equity

Equity	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Equity	13 . EQUITY Capital Purchase Program ("CPP") Warrants CPP warrants were issued in 2009 as part of a program established by the U.S. Department of the Treasury under the Emergency Economic Stabilization Act of 2008. The CPP warrants expired on June 26, 2019. CPP warrant exercises were 0.1 million for the three months ended September 30, 2018 . CPP warrant exercises were 1.9 million and 0.2 million for the nine months ended September 30, 2019 and 2018, respectively. As of December 31, 2018 , the Company had 1.9 million of CPP warrants outstanding and exercisable. Equity Repurchase Program In February, 2019, the Company announced a $1.0 billion share repurchase authorization by the Board of Directors which is effective through December 31, 2020. Based on projected holding company resources, the Company has begun share repurchases in 2019 but anticipates using the majority of the program in 2020. Any repurchase of shares under the equity repurchase program is dependent on market conditions and other factors. During the period October 1, 2019 to November 1, 2019, the Company repurchased approximately 0.6 million common shares for $36 . Equity Repurchase Activity and Remaining Repurchase Capacity Three months ended Common Shares Repurchased Cost of Shares Repurchased Average Price Paid per Share Remaining Capacity Under Share Repurchase Authorization (In millions, except for per share data) June 30, 2019 0.5 $ 27 $ 53.84 $ 973 September 30, 2019 1.1 $ 63 $ 58.50 $ 910 Total 1.6 $ 90

Changes in and Reclassification

Changes in and Reclassifications from Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in and Reclassifications from Accumulated Other Comprehensive Income (Loss)	14 . CHANGES IN AND RECLASSIFICATIONS FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Changes in AOCI, Net of Tax for the Three Months Ended September 30, 2019 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 1,367 $ (3 ) $ 11 $ 34 $ (1,607 ) $ (198 ) OCI before reclassifications 458 — 8 (4 ) 1 463 Amounts reclassified from AOCI (57 ) — (2 ) — 8 (51 ) OCI, net of tax 401 — 6 (4 ) 9 412 Ending balance $ 1,768 $ (3 ) $ 17 $ 30 $ (1,598 ) $ 214 Changes in AOCI, Net of Tax for the Nine Months Ended September 30, 2019 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 24 $ (4 ) $ (5 ) $ 30 $ (1,624 ) $ (1,579 ) OCI before reclassifications 1,857 1 27 — 1 1,886 Amounts reclassified from AOCI (113 ) — (5 ) — 25 (93 ) OCI, net of tax 1,744 1 22 — 26 1,793 Ending balance $ 1,768 $ (3 ) $ 17 $ 30 $ (1,598 ) $ 214 Reclassifications from AOCI Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Affected Line Item in the Condensed Consolidated Statement of Operations Net Unrealized Gain on Securities Available-for-sale securities $ 72 $ 143 Net realized capital gains 72 143 Total before tax 15 30 Income tax expense $ 57 $ 113 Net income Net Gains on Cash Flow Hedging Instruments Interest rate swaps $ — $ 2 Net realized capital gains Interest rate swaps 1 1 Net investment income Interest rate swaps — 1 Interest expense Foreign currency swaps 1 2 Net investment income 2 6 Total before tax — 1 Income tax expense $ 2 $ 5 Net income Pension and Other Postretirement Plan Adjustments Amortization of prior service credit $ 2 $ 5 Insurance operating costs and other expenses Amortization of actuarial loss (12 ) (37 ) Insurance operating costs and other expenses (10 ) (32 ) Total before tax (2 ) (7 ) Income tax expense $ (8 ) $ (25 ) Net income Total amounts reclassified from AOCI $ 51 $ 93 Net income Changes in AOCI, Net of Tax for the Three Months Ended September 30, 2018 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 211 $ (3 ) $ (12 ) $ 33 $ (1,582 ) $ (1,353 ) OCI before reclassifications (183 ) (1 ) 1 1 1 (181 ) Amounts reclassified from AOCI 12 — (6 ) — 9 15 OCI, net of tax (171 ) (1 ) (5 ) 1 10 (166 ) Ending balance $ 40 $ (4 ) $ (17 ) $ 34 $ (1,572 ) $ (1,519 ) Changes in AOCI, Net of Tax for the Nine Months Ended September 30, 2018 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 1,931 $ (3 ) $ 18 $ 34 $ (1,317 ) $ 663 Cumulative effect of accounting changes, net of tax [1] 273 — 2 4 (284 ) (5 ) Adjusted balance, beginning of period 2,204 (3 ) 20 38 (1,601 ) 658 OCI before reclassifications [2] (2,213 ) — (12 ) (4 ) — (2,229 ) Amounts reclassified from AOCI 49 (1 ) (25 ) — 29 52 OCI, net of tax (2,164 ) (1 ) (37 ) (4 ) 29 (2,177 ) Ending balance $ 40 $ (4 ) $ (17 ) $ 34 $ (1,572 ) $ (1,519 ) [1] Includes reclassification to retained earnings of $88 of stranded tax effects and $93 of net unrealized gains, net of tax, related to equity securities. For further discussion of these reclassifications, see Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to the Consolidated Financial Statements included in The Hartford's 2018 Form 10-K Annual Report. [2]The reduction in AOCI included the effect of removing $758 of Talcott Resolution AOCI from the balance sheet when the business was sold effective May 31, 2018. Reclassifications from AOCI Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Affected Line Item in the Condensed Consolidated Statement of Operations Net Unrealized Loss on Securities Available-for-sale securities $ (15 ) $ (59 ) Net realized capital gains (15 ) (59 ) Total before tax (3 ) (12 ) Income tax expense — (2 ) Income from discontinued operations, net of tax $ (12 ) $ (49 ) Net income OTTI Losses in OCI Other than temporary impairments $ — $ — Net realized capital gains — — Income before taxes — — Income tax expense (benefit) $ — $ 1 Income from discontinued operations, net of tax $ — $ 1 Net Income (loss) Net Gains on Cash Flow Hedging Instruments Interest rate swaps $ — $ 1 Net realized capital gains Interest rate swaps 7 24 Net investment income 7 25 Total before tax 1 5 Income tax expense (benefit) — 5 Income from discontinued operations, net of tax $ 6 $ 25 Net income Pension and Other Postretirement Plan Adjustments Amortization of prior service credit $ 2 $ 5 Insurance operating costs and other expenses Amortization of actuarial loss (14 ) (42 ) Insurance operating costs and other expenses (12 ) (37 ) Total before tax (3 ) (8 ) Income tax expense $ (9 ) $ (29 ) Net income Total amounts reclassified from AOCI $ (15 ) $ (52 ) Net income

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2019
Retirement Benefits [Abstract]
Employee Benefit Plans	15 . EMPLOYEE BENEFIT PLANS The Company’s employee benefit plans are described in Note 18 - Employee Benefit Plans of Notes to Consolidated Financial Statements included in The Hartford’s 2018 Annual Report on Form 10-K. The Company, at its discretion, made a contribution of $70 in September 2019 to the U.S. qualified defined benefit pension plan. Net Periodic Cost (Benefit) Pension Benefits Other Postretirement Benefits Three Months Ended September 30, Nine months ended September 30, Three Months Ended September 30, Nine months ended September 30, 2019 2018 2019 2018 2019 2018 2019 2018 Service cost $ 1 $ 1 $ 3 $ 3 $ — $ — $ — $ — Interest cost 40 36 119 107 2 1 6 4 Expected return on plan assets (57 ) (57 ) (170 ) (172 ) (1 ) (2 ) (3 ) (5 ) Amortization of prior service credit — — — — (2 ) (2 ) (5 ) (5 ) Amortization of actuarial loss 11 12 33 37 1 2 4 5 Net periodic cost (benefit) $ (5 ) $ (8 ) $ (15 ) $ (25 ) $ — $ (1 ) $ 2 $ (1 )

Business Dispositions and Disco

Business Dispositions and Discontinued Operations	9 Months Ended
	Sep. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Business Dispositions and Discontinued Operations	17 . BUSINESS DISPOSITION AND DISCONTINUED OPERATIONS Sale of life and annuity business On May 31, 2018, the Company’s wholly-owned subsidiary, Hartford Holdings, Inc., completed the sale of its life and annuity business to a group of investors led by Cornell Capital LLC, Atlas Merchant Capital LLC, TRB Advisors LP, Global Atlantic Financial Group, Pine Brook and J. Safra Group. Under the terms of the sale agreement signed December 3, 2017, the investor group formed a limited partnership, Hopmeadow Holdings LP, that acquired HLI, and its life and annuity operating subsidiaries. The Hartford received a 9.7% ownership interest in the limited partnership. The life and annuity operations met the criteria for reporting as discontinued operations and are reported in the Corporate category through the date of sale. The Hartford reported its 9.7% ownership interest in Hopmeadow Holdings LP, which is accounted for under the equity method, in other assets in the Condensed Consolidated Balance Sheet. The Hartford recognizes its share of income in other revenues in the Condensed Consolidated Statement of Operations on a three month delay, when financial information from the investee becomes available. The Company recognized $ 14 and $45 , before tax, of income for the three and nine months ended September 30, 2019, respectively. Cash inflows for dividends received from Hopmeadow Holdings LP were $67 for the three and nine months ended September 30, 2019. Other cash inflows and outflows from and to the life and annuity business after closing were immaterial to the overall inflows and outflows of the Company. For further information on the sale, including ongoing transactions with the life and annuity business sold, see Note 20 - Business Dispositions and Discontinued Operations of Notes to Consolidated Financial Statements, included in The Hartford's 2018 Form 10-K Annual Report. Reconciliation of the Major Line Items Constituting Pretax Profit (Loss) of Discontinued Operations Three Months Ended September 30, Nine Months Ended September 30, 2018 2018 Revenues Earned premiums $ — $ 39 Fee income and other — 382 Net investment income — 519 Net realized capital gains (losses) 4 (68 ) Total revenues 4 872 Benefits, losses and expenses Benefits, losses and loss adjustment expenses — 535 Amortization of DAC — 58 Insurance operating costs and other expenses [1] (5 ) 157 Total benefits, losses and expenses (5 ) 750 Income before income taxes 9 122 Income tax expense (benefit) (7 ) 2 Income from operations of discontinued operations, net of tax 16 120 Net realized capital gain (loss) on disposal, net of tax (11 ) 202 Income from discontinued operations, net of tax $ 5 $ 322 [1]Corporate allocated overhead has been included in continuing operations. Cash Flows from Discontinued Operations Nine Months Ended September 30, 2018 Net cash provided by operating activities from discontinued operations $ 603 Net cash provided by investing activities from discontinued operations $ 463 Net cash used in financing activities from discontinued operations [1] $ (737 ) Cash paid for interest $ — [1] Excludes return of capital to parent of $619 for the nine months ended September 30, 2018. Cash flows from discontinued operations are included in the Condensed Consolidated Statement of Cash Flows.

Leases Leases

Leases Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	16 . LEASES The Hartford has operating leases for real estate and equipment. The right-of-use asset as of September 30, 2019 was $ 200 and is included in property and equipment, net, in the Condensed Consolidated Balance Sheet. The lease liability as of September 30, 2019 was $ 209 and is included in other liabilities in the Condensed Consolidated Balance Sheet. Variable lease costs include changes in interest rates on variable rate leases primarily for automobiles. Components of Lease Expense Three Months Ended September 30, Nine Months Ended September 30, 2019 2019 Operating lease cost $ 13 $ 36 Short-term lease cost — 1 Variable lease cost — 1 Sublease income (1 ) (4 ) Total lease costs included in insurance operating costs and other expenses $ 12 $ 34 Supplemental Operating Lease Information September 30, 2019 Operating cash flows for operating leases (for the nine months ended) $ 36 Weighted-average remaining lease term in years for operating leases 6 years Weighted-average discount rate for operating leases 3.6 % Maturities of Operating Lease Liabilities As of September 30, 2019 2019 $ 13 2020 51 2021 39 2022 33 2023 30 Thereafter 66 Total lease payments 232 Less: Discount on lease payments to present value 23 Total lease liability $ 209 In July 2019, The Hartford entered into a 12 year operating lease for office space, which will result in an additional right-of-use asset and lease liability of approximately $ 34 upon lease commencement in July 2020.

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Hartford Financial Services Group, Inc. is a holding company for insurance and financial services subsidiaries that provide property and casualty insurance, group life and disability products and mutual funds and exchange-traded products to individual and business customers (collectively, “The Hartford”, the “Company”, “we” or “our”). On May 23, 2019, the Company completed the previously announced acquisition of The Navigators Group, Inc. ("Navigators Group"), a global specialty underwriter, for $70 a share, or $2.137 billion in cash, including transaction expenses. For further discussion of this transaction, see Note 2 - Business Acquisition of Notes to Condensed Consolidated Financial Statements. On May 31, 2018, Hartford Holdings, Inc., a wholly owned subsidiary of the Company, completed the sale of the issued and outstanding equity of Hartford Life, Inc. (“HLI”), a holding company, for its life and annuity operating subsidiaries. For further discussion of this transaction, see Note 17 - Business Disposition and Discontinued Operations of Notes to Condensed Consolidated Financial Statements. The Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information, which differ materially from the accounting practices prescribed by various insurance regulatory authorities. These Condensed Consolidated Financial Statements and Notes should be read in conjunction with the Consolidated Financial Statements and Notes thereto included in the Company's 2018 Form 10-K Annual Report. The results of operations for interim periods are not necessarily indicative of the results that may be expected for the full year. The accompanying Condensed Consolidated Financial Statements and Notes are unaudited. These financial statements reflect all adjustments (generally consisting only of normal accruals) which are, in the opinion of management, necessary for the fair presentation of the financial position, results of operations and cash flows for the interim periods. The Company's significant accounting policies are summarized in Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to Consolidated Financial Statements included in the Company's 2018 Form 10-K Annual Report.
Consolidation	Consolidation The Condensed Consolidated Financial Statements include the accounts of The Hartford Financial Services Group, Inc., and entities in which the Company directly or indirectly has a controlling financial interest. Entities in which the Company has significant influence over the operating and financing decisions but does not control are reported using the equity method. All intercompany transactions and balances between The Hartford and its subsidiaries and affiliates that are not held for sale have been eliminated.
Discontinued Operations, Policy [Policy Text Block]	Discontinued Operations The results of operations of a component of the Company are reported in discontinued operations when certain criteria are met as of the date of disposal, or earlier if classified as held-for-sale. When a component is identified for discontinued operations reporting, amounts for prior periods are retrospectively reclassified as discontinued operations. Components are identified as discontinued operations if they are a major part of an entity's operations and financial results such as a separate major line of business or a separate major geographical area of operations.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The most significant estimates include those used in determining property and casualty and group long-term disability insurance product reserves, net of reinsurance; evaluation of goodwill for impairment; valuation of investments and derivative instruments; valuation allowance on deferred tax assets; and contingencies relating to corporate litigation and regulatory matters.
Reclassification, Policy [Policy Text Block]	Reclassifications Certain reclassifications have been made to prior year financial information to conform to the current year presentation. In particular, restricted cash has been reclassified out of cash to a separate line on the Condensed Consolidated Balance Sheets. Restrictions on cash primarily relate to funds that are held to support regulatory and contractual obligations.
Adoption of New Accounting Standards	Adoption of New Accounting Standards Hedging Activities On January 1, 2019, the Company adopted the Financial Accounting Standards Board's ("FASB") updated guidance for hedge accounting through a cumulative effect adjustment of less than $1 to reclassify cumulative ineffectiveness on cash flow hedges from retained earnings to accumulated other comprehensive income ("AOCI"). The updates allow hedge accounting for new types of interest rate hedges of financial instruments and simplify documentation requirements to qualify for hedge accounting. In addition, any gain or loss from hedge ineffectiveness is reported in the same income statement line with the effective hedge results and the hedged transaction. For cash flow hedges, the ineffectiveness is recognized in earnings only when the hedged transaction affects earnings; otherwise, the ineffectiveness gains or losses remain in AOCI. Under previous accounting, total hedge ineffectiveness was reported separately in realized capital gains and losses apart from the hedged transaction. The adoption did not affect the Company’s financial position or cash flows or have a material effect on net income. Leases On January 1, 2019 , the Company adopted the FASB’s updated lease guidance. Under the updated guidance, lessees with operating leases are required to recognize a liability for the present value of future minimum lease payments with a corresponding asset for the right of use of the property. Prior to the new guidance, future minimum lease payments on operating leases were commitments that were not recognized as liabilities on the balance sheet. Leases are classified as financing or operating leases. Where the lease is economically similar to a purchase because The Hartford obtains control of the underlying asset, the lease is classified as a financing lease and the Company recognizes amortization of the right of use asset and interest expense on the liability. Where the lease provides The Hartford with only the right to control the use of the underlying asset over the lease term and the lease term is greater than one year, the lease is an operating lease and the lease cost is recognized as rental expense over the lease term on a straight-line basis. Leases with a term of one year or less are also expensed over the lease term but not recognized on the balance sheet. On adoption, The Hartford recorded a lease payment obligation of $160 for outstanding leases and a right of use asset of $150 , which is net of $10 in lease incentives received, with no change to comparative periods. As permitted by the new guidance, as of the implementation date, the Company did not reassess whether expired or existing contracts are leases or contain leases, did not change the classification of expired or existing operating leases, and did not reassess initial direct costs for existing leases to determine if deferred costs should be written-off or recorded on adoption. The adoption did not impact net income or cash flows. Future Adoption of New Accounting Standards Financial Instruments - Credit Losses The FASB issued updated guidance for recognition and measurement of credit losses on financial instruments. See Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to Consolidated Financial Statements included in the Company's 2018 Form 10-K Annual Report for more information on the future adoption of the new financial instruments credit losses accounting standard. The Company will adopt the updated guidance January 1, 2020, as required, although earlier adoption is permitted. While the ultimate impact of the adoption will depend on the size and composition of the financial instruments and market conditions at the adoption date, the adoption is not expected to have a material effect on the Company’s financial position, cash flows or net income. The Company’s implementation activities are ongoing and include review and validation of methodologies, data and assumptions used to estimate expected credit losses on financial instruments carried at other than fair value as well as testing updates to our investment accounting system to establish and adjust valuation allowances for fixed maturities, available for sale (“AFS”), subject to a fair value floor.
Commitments and Contingencies, Policy [Policy Text Block]	Management evaluates each contingent matter separately. A loss is recorded if probable and reasonably estimable. Management establishes liabilities for these contingencies at its “best estimate,” or, if no one number within the range of possible losses is more probable than any other, the Company records an estimated liability at the low end of the range of losses.
Fair Value of Financial Instruments, Policy [Policy Text Block]	The Company carries certain financial assets and liabilities at estimated fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants. Our fair value framework includes a hierarchy that gives the highest priority to the use of quoted prices in active markets, followed by the use of market observable inputs, followed by the use of unobservable inputs. The fair value hierarchy levels are as follows: Level 1 Fair values based primarily on unadjusted quoted prices for identical assets or liabilities, in active markets that the Company has the ability to access at the measurement date. Level 2 Fair values primarily based on observable inputs, other than quoted prices included in Level 1, or based on prices for similar assets and liabilities. Level 3 Fair values derived when one or more of the significant inputs are unobservable (including assumptions about risk). With little or no observable market, the determination of fair values uses considerable judgment and represents the Company’s best estimate of an amount that could be realized in a market exchange for the asset or liability. Also included are securities that are traded within illiquid markets and/or priced by independent brokers. The Company will classify the financial asset or liability by level based upon the lowest level input that is significant to the determination of the fair value. In most cases, both observable inputs (e.g., changes in interest rates) and unobservable inputs (e.g., changes in risk assumptions) are used to determine fair values that the Company has classified within Level 3. Valuation Techniques The Company generally determines fair values using valuation techniques that use prices, rates, and other relevant information evident from market transactions involving identical or similar instruments. Valuation techniques also include, where appropriate, estimates of future cash flows that are converted into a single discounted amount using current market expectations. The Company uses a "waterfall" approach comprised of the following pricing sources and techniques, which are listed in priority order: • Quoted prices, unadjusted, for identical assets or liabilities in active markets, which are classified as Level 1. • Prices from third-party pricing services, which primarily utilize a combination of techniques. These services utilize recently reported trades of identical, similar, or benchmark securities making adjustments for market observable inputs available through the reporting date. If there are no recently reported trades, they may use a discounted cash flow technique to develop a price using expected cash flows based upon the anticipated future performance of the underlying collateral discounted at an estimated market rate. Both techniques develop prices that consider the time value of future cash flows and provide a margin for risk, including liquidity and credit risk. Most prices provided by third-party pricing services are classified as Level 2 because the inputs used in pricing the securities are observable. However, some securities that are less liquid or trade less actively are classified as Level 3. Additionally, certain long-dated securities, such as municipal securities and bank loans, include benchmark interest rate or credit spread assumptions that are not observable in the marketplace and are thus classified as Level 3. • Internal matrix pricing, which is a valuation process internally developed for private placement securities for which the Company is unable to obtain a price from a third-party pricing service. Internal pricing matrices determine credit spreads that, when combined with risk-free rates, are applied to contractual cash flows to develop a price. The Company develops credit spreads using market based data for public securities adjusted for credit spread differentials between public and private securities, which are obtained from a survey of multiple private placement brokers. The market-based reference credit spread considers the issuer’s financial strength and term to maturity, using an independent public security index and trade information, while the credit spread differential considers the non-public nature of the security. Securities priced using internal matrix pricing are classified as Level 2 because the inputs are observable or can be corroborated with observable data. • Independent broker quotes, which are typically non-binding, use inputs that can be difficult to corroborate with observable market based data. Brokers may use present value techniques using assumptions specific to the security types, or they may use recent transactions of similar securities. Due to the lack of transparency in the process that brokers use to develop prices, valuations that are based on independent broker quotes are classified as Level 3. The fair value of derivative instruments is determined primarily using a discounted cash flow model or option model technique and incorporates counterparty credit risk. In some cases, quoted market prices for exchange-traded and over-the-counter ("OTC") cleared derivatives may be used and in other cases independent broker quotes may be used. The pricing valuation models primarily use inputs that are observable in the market or can be corroborated by observable market data. The valuation of certain derivatives may include significant inputs that are unobservable, such as volatility levels, and reflect the Company’s view of what other market participants would use when pricing such instruments. Valuation Controls The fair value process for investments is monitored by the Valuation Committee, which is a cross-functional group of senior management within the Company that meets at least quarterly. The purpose of the committee is to oversee the pricing policy and procedures, as well as to approve changes to valuation methodologies and pricing sources. Controls and procedures used to assess third-party pricing services are reviewed by the Valuation Committee, including the results of annual due-diligence reviews. There are also two working groups under the Valuation Committee: a Securities Fair Value Working Group (“Securities Working Group”) and a Derivatives Fair Value Working Group ("Derivatives Working Group"). The working groups, which include various investment, operations, accounting and risk management professionals, meet monthly to review market data trends, pricing and trading statistics and results, and any proposed pricing methodology changes. The Securities Working Group reviews prices received from third parties to ensure that the prices represent a reasonable estimate of the fair value. The group considers trading volume, new issuance activity, market trends, new regulatory rulings and other factors to determine whether the market activity is significantly different than normal activity in an active market. A dedicated pricing unit follows up with trading and investment sector professionals and challenges prices of third-party pricing services when the estimated assumptions used differ from what the unit believes a market participant would use. If the available evidence indicates that pricing from third-party pricing services or broker quotes is based upon transactions that are stale or not from trades made in an orderly market, the Company places little, if any, weight on the third party service’s transaction price and will estimate fair value using an internal process, such as a pricing matrix. The Derivatives Working Group reviews the inputs, assumptions and methodologies used to ensure that the prices represent a reasonable estimate of the fair value. A dedicated pricing team works directly with investment sector professionals to investigate the impacts of changes in the market environment on prices or valuations of derivatives. New models and any changes to current models are required to have detailed documentation and are validated to a second source. The model validation documentation and results of validation are presented to the Valuation Committee for approval. The Company conducts other monitoring controls around securities and derivatives pricing including, but not limited to, the following: • Review of daily price changes over specific thresholds and new trade comparison to third-party pricing services. • Daily comparison of OTC derivative market valuations to counterparty valuations. • Review of weekly price changes compared to published bond prices of a corporate bond index. • Monthly reviews of price changes over thresholds, stale prices, missing prices, and zero prices. • Monthly validation of prices to a second source for securities in most sectors and for certain derivatives. In addition, the Company’s enterprise-wide Operational Risk Management function, led by the Chief Risk Officer, is responsible for model risk management and provides an independent review of the suitability and reliability of model inputs, as well as an analysis of significant changes to current models. Valuation Inputs Quoted prices for identical assets in active markets are considered Level 1 and consist of on-the-run U.S. Treasuries, money market funds, exchange-traded equity securities, open-ended mutual funds, certain short-term investments, and exchange traded futures and option contracts. Valuation Inputs Used in Levels 2 and 3 Measurements for Securities and Derivatives Level 2 Primary Observable Inputs Level 3 Primary Unobservable Inputs Fixed Maturity Investments Structured securities (includes ABS, CLOs, CMBS and RMBS) • Benchmark yields and spreads • Monthly payment information • Collateral performance, which varies by vintage year and includes delinquency rates, loss severity rates and refinancing assumptions • Credit default swap indices Other inputs for ABS and RMBS: • Estimate of future principal prepayments, derived from the characteristics of the underlying structure • Prepayment speeds previously experienced at the interest rate levels projected for the collateral • Independent broker quotes • Credit spreads beyond observable curve • Interest rates beyond observable curve Other inputs for less liquid securities or those that trade less actively, including subprime RMBS: • Estimated cash flows • Credit spreads, which include illiquidity premium • Constant prepayment rates • Constant default rates • Loss severity Corporates • Benchmark yields and spreads • Reported trades, bids, offers of the same or similar securities • Issuer spreads and credit default swap curves Other inputs for investment grade privately placed securities that utilize internal matrix pricing: • Credit spreads for public securities of similar quality, maturity, and sector, adjusted for non-public nature • Independent broker quotes • Credit spreads beyond observable curve • Interest rates beyond observable curve Other inputs for below investment grade privately placed securities: • Independent broker quotes • Credit spreads for public securities of similar quality, maturity, and sector, adjusted for non-public nature U.S. Treasuries, Municipals, and Foreign government/government agencies • Benchmark yields and spreads • Issuer credit default swap curves • Political events in emerging market economies • Municipal Securities Rulemaking Board reported trades and material event notices • Issuer financial statements • Credit spreads beyond observable curve • Interest rates beyond observable curve Equity Securities • Quoted prices in markets that are not active • For privately traded equity securities, internal discounted cash flow models utilizing earnings multiples or other cash flow assumptions that are not observable Short-term Investments • Benchmark yields and spreads • Reported trades, bids, offers • Issuer spreads and credit default swap curves • Material event notices and new issue money market rates Not applicable Derivatives Credit derivatives • Swap yield curve • Credit default swap curves Not applicable Equity derivatives • Equity index levels • Swap yield curve • Independent broker quotes • Equity volatility Foreign exchange derivatives • Swap yield curve • Currency spot and forward rates • Cross currency basis curves Not applicable Interest rate derivatives • Swap yield curve • Independent broker quotes • Interest rate volatility

Business Acquisitions (Tables)

Business Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Fair Value of Assets Acquired and Liabilities Assumed at the Acquisition Date As of May 23, 2019 Assets Cash and invested assets $ 3,848 Premiums receivable 492 Reinsurance recoverables 1,100 Prepaid reinsurance premiums 238 Other intangible assets 580 Property and equipment 83 Other assets 99 Total Assets Acquired 6,440 Liabilities Unpaid losses and loss adjustment expenses 2,823 Unearned premiums 1,219 Long-term debt 284 Deferred income taxes, net 48 Other liabilities 568 Total Liabilities Assumed 4,942 Net identifiable assets acquired 1,498 Goodwill [1] 623 Net Assets Acquired $ 2,121 [1] Non-deductible for income tax purposes.
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	Intangible Assets Recorded in Connection with the Acquisition Asset Amount Weighted Average Expected Life Value of in-force contracts - Property and Casualty ("P&C") $ 180 1 Distribution relationships 302 15 Trade name 17 10 Total finite life intangibles 499 10 Capacity of Lloyd's Syndicate 66 Licenses 15 Total indefinite life intangibles 81 Total other intangible assets $ 580
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Expected Pre-tax Amortization Expense [1] for Acquired Intangibles as of September 30, 2019 Value of In-force Contracts Other Intangible Assets 2019 (three months) $ 38 $ 5 2020 $ 47 $ 22 2021 $ 21 $ 22 2022 $ 9 $ 22 2023 $ — $ 22 [1] In the Condensed Consolidated Statements of Operations, the amortization of value of in-force contracts is reported in amortization of deferred policy acquisition costs and the amortization of other intangible assets is reported in amortization of other intangible assets.
Business Acquisition, Pro Forma Information [Table Text Block]	Pro Forma Results for the Nine Months Ended September 30 Revenue Earnings 2019 Supplemental (unaudited) combined pro forma $ 16,055 $ 1,532 2018 Supplemental (unaudited) combined pro forma $ 15,404 $ 1,669

Earnings (Loss) Per Common Shar

Earnings (Loss) Per Common Share Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings (Loss) Per Common Share	Computation of Basic and Diluted Earnings per Common Share Three Months Ended September 30, Nine Months Ended September 30, (In millions, except for per share data) 2019 2018 2019 2018 Earnings Income from continuing operations, net of tax $ 535 $ 427 $ 1,537 $ 1,289 Less: Preferred stock dividends 11 — 16 — Income from continuing operations, net of tax, available to common stockholders 524 427 $ 1,521 $ 1,289 Income from discontinued operations, net of tax, available to common stockholders — 5 — 322 Net income available to common stockholders $ 524 $ 432 $ 1,521 $ 1,611 Shares Weighted average common shares outstanding, basic 361.4 358.6 361.0 358.1 Dilutive effect of stock-based awards under compensation plans 4.0 3.6 3.4 4.0 Dilutive effect of warrants [1] — 1.9 0.7 2.0 Weighted average common shares outstanding and dilutive potential common shares 365.4 364.1 365.1 364.1 Earnings per common share Basic Income from continuing operations, net of tax, available to common stockholders $ 1.45 $ 1.19 $ 4.21 $ 3.60 Income from discontinued operations, net of tax, available to common stockholders — 0.01 — 0.90 Net income available to common stockholders $ 1.45 $ 1.20 $ 4.21 $ 4.50 Diluted Income from continuing operations, net of tax, available to common stockholders $ 1.43 $ 1.17 $ 4.17 $ 3.54 Income from discontinued operations, net of tax, available to common stockholders — 0.02 — 0.88 Net income available to common stockholders $ 1.43 $ 1.19 $ 4.17 $ 4.42

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Reconciliation of Net Income from Segments to Consolidated	Net Income Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Commercial Lines $ 336 $ 289 $ 890 $ 959 Personal Lines 94 51 252 146 Property & Casualty Other Operations 18 9 52 31 Group Benefits 146 77 377 227 Hartford Funds 40 41 108 112 Corporate (99 ) (35 ) (142 ) 136 Net income 535 432 1,537 1,611 Preferred stock dividends 11 — 16 — Net income available to common stockholders $ 524 $ 432 $ 1,521 $ 1,611
Reconciliation of Revenue from Segments to Consolidated	Revenues Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Earned premiums and fee income: Commercial Lines Workers’ compensation $ 825 $ 845 $ 2,480 $ 2,495 Liability 330 170 731 480 Marine 59 — 86 — Package business 376 343 1,092 1,013 Property 198 154 529 456 Professional liability 137 65 304 190 Bond 67 60 192 179 Assumed reinsurance 75 — 104 — Automobile 191 157 522 454 Total Commercial Lines 2,258 1,794 6,040 5,267 Personal Lines Automobile 564 598 1,690 1,809 Homeowners 248 261 741 785 Total Personal Lines [1] 812 859 2,431 2,594 Group Benefits Group disability 697 684 2,124 2,051 Group life 621 652 1,902 1,968 Other 64 60 187 179 Total Group Benefits 1,382 1,396 4,213 4,198 Hartford Funds Mutual fund and Exchange-Traded Products ("ETP") 231 242 674 710 Talcott Resolution life and annuity separate accounts [2] 23 25 69 76 Total Hartford Funds 254 267 743 786 Corporate 18 15 43 21 Total earned premiums and fee income 4,724 4,331 13,470 12,866 Net investment income 490 444 1,448 1,323 Net realized capital gains 89 38 332 60 Other revenues 44 29 129 73 Total revenues $ 5,347 $ 4,842 $ 15,379 $ 14,322 [1] For the three months ended September 30, 2019 and 2018 , AARP members accounted for earned premiums of $729 and $758 , respectively. For the nine months ended September 30, 2019 and 2018 , AARP members accounted for earned premiums of $2.2 billion and $2.3 billion , respectively. [2] Represents revenues earned for investment advisory services on the life and annuity separate account AUM sold in May 2018 that is still managed by the Company's Hartford Funds segment.
Disaggregation of Revenue [Table Text Block]	Revenue from Non-Insurance Contracts with Customers Three months ended September 30, Nine months ended September 30, Revenue Line Item 2019 2018 2019 2018 Commercial Lines Installment billing fees Fee income $ 8 $ 9 $ 26 $ 26 Personal Lines Installment billing fees Fee income 9 10 28 30 Insurance servicing revenues Other revenues 23 24 65 66 Group Benefits Administrative services Fee income 45 43 135 131 Hartford Funds Advisor, distribution and other management fees Fee income 232 245 677 722 Other fees Fee income 22 21 65 63 Corporate Investment management and other fees Fee income 14 15 38 21 Transition service revenues Other revenues 6 6 18 8 Total non-insurance revenues with customers $ 359 $ 373 $ 1,052 $ 1,067

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of September 30, 2019 Total Quoted Prices in Significant Significant Assets accounted for at fair value on a recurring basis Fixed maturities, AFS Asset-backed-securities ("ABS") $ 1,337 $ — $ 1,337 $ — Collateralized loan obligations ("CLOs") 2,158 — 1,862 296 Commercial mortgage-backed securities ("CMBS") 4,254 — 4,234 20 Corporate 17,801 — 17,078 723 Foreign government/government agencies 1,117 — 1,114 3 Municipal 9,895 — 9,895 — Residential mortgage-backed securities ("RMBS") 4,732 — 4,118 614 U.S. Treasuries 1,095 7 1,088 — Total fixed maturities 42,389 7 40,726 1,656 Fixed maturities, FVO 39 — 39 — Equity securities, at fair value 1,414 1,196 148 70 Derivative assets Credit derivatives 9 — 9 — Foreign exchange derivatives 4 — 4 — Interest rate derivatives (1 ) — (1 ) — Total derivative assets [1] 12 — 12 — Short-term investments 2,927 1,211 1,716 — Total assets accounted for at fair value on a recurring basis $ 46,781 $ 2,414 $ 42,641 $ 1,726 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives (1 ) — (1 ) — Equity derivatives (5 ) — — (5 ) Foreign exchange derivatives 4 — 4 — Interest rate derivatives (69 ) — (69 ) — Total derivative liabilities [2] (71 ) — (66 ) (5 ) Contingent consideration [3] (21 ) — — (21 ) Total liabilities accounted for at fair value on a recurring basis $ (92 ) $ — $ (66 ) $ (26 ) Assets and (Liabilities) Carried at Fair Value by Hierarchy Level as of December 31, 2018 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets accounted for at fair value on a recurring basis Fixed maturities, AFS Asset-backed-securities ("ABS") $ 1,276 $ — $ 1,266 $ 10 Collateralized loan obligations ("CLOs") 1,437 — 1,337 100 Commercial mortgage-backed securities ("CMBS") 3,552 — 3,540 12 Corporate 13,398 — 12,878 520 Foreign government/government agencies 847 — 844 3 Municipal 10,346 — 10,346 — Residential mortgage-backed securities ("RMBS") 3,279 — 2,359 920 U.S. Treasuries 1,517 330 1,187 — Total fixed maturities 35,652 330 33,757 1,565 Fixed maturities, FVO 22 — 22 — Equity securities, at fair value 1,214 1,093 44 77 Derivative assets Credit derivatives 5 — 5 — Equity derivatives 3 — — 3 Foreign exchange derivatives (2 ) — (2 ) — Interest rate derivatives 1 — 1 — Total derivative assets [1] 7 — 4 3 Short-term investments 4,283 1,039 3,244 — Total assets accounted for at fair value on a recurring basis $ 41,178 $ 2,462 $ 37,071 $ 1,645 Liabilities accounted for at fair value on a recurring basis Derivative liabilities Credit derivatives (2 ) — (2 ) — Equity derivatives 1 — 1 — Foreign exchange derivatives (5 ) — (5 ) — Interest rate derivatives (62 ) — (63 ) 1 Total derivative liabilities [2] (68 ) — (69 ) 1 Contingent consideration [3] (35 ) — — (35 ) Total liabilities accounted for at fair value on a recurring basis $ (103 ) $ — $ (69 ) $ (34 ) [1] Includes derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. See footnote 2 to this table for derivative liabilities. [2] Includes derivative instruments in a net negative fair value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements which may be imposed by agreements and applicable law. [3] For additional information see the Contingent Consideration section below.
Fair Value Inputs, Assets, Quantitative Information	Significant Unobservable Inputs for Level 3 - Securities Assets accounted for at fair value on a recurring basis Fair Predominant Significant Unobservable Input Minimum Maximum Weighted Average [1] Impact of As of September 30, 2019 CLOs [3] $ 225 Discounted cash flows Spread 235 bps 244 bps 240 bps Decrease CMBS [3] $ 11 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 9 bps 1,832 bps 197 bps Decrease Corporate [4] $ 508 Discounted cash flows Spread 126 bps 668 bps 223 bps Decrease RMBS [3] $ 614 Discounted cash flows Spread [6] 15 bps 231 bps 73 bps Decrease Constant prepayment rate [6] 1% 11% 6% Decrease [5] Constant default rate [6] 1% 5% 3% Decrease Loss severity [6] —% 100% 72% Decrease As of December 31, 2018 CMBS [3] $ 2 Discounted cash flows Spread (encompasses prepayment, default risk and loss severity) 9 bps 1,040 bps 182 bps Decrease Corporate [4] $ 274 Discounted cash flows Spread 145 bps 1,175 bps 263 bps Decrease RMBS [3] $ 815 Discounted cash flows Spread [6] 12 bps 215 bps 86 bps Decrease Constant prepayment rate [6] 1% 15% 6% Decrease [5] Constant default rate [6] 1% 8% 3% Decrease Loss severity [6] —% 100% 61% Decrease [1] The weighted average is determined based on the fair value of the securities. [2] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. [3] Excludes securities for which the Company bases fair value on broker quotations. [4] Excludes securities for which the Company bases fair value on broker quotations; however, included are broker priced lower-rated private placement securities for which the Company receives spread and yield information to corroborate the fair value. [5] Decrease for above market rate coupons and increase for below market rate coupons. [6] Generally, a change in the assumption used for the constant default rate would have been accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for constant prepayment rate and would have resulted in wider spreads. Significant Unobservable Inputs for Level 3 - Derivatives Fair Predominant Significant Unobservable Input Minimum Maximum Weighted Average [1] Impact of As of September 30, 2019 Equity options $ (5 ) Option model Equity volatility 11 % 25 % 15 % Increase As of December 31, 2018 Interest rate swaptions [3] $ 1 Option model Interest rate volatility 3 % 3 % 3 % Increase Equity options $ 3 Option model Equity volatility 19 % 21 % 20 % Increase [1] The weighted average is determined based on the fair value of the derivatives. [2] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. Changes are based on long positions, unless otherwise noted. Changes in fair value will be inversely impacted for short positions. [3] The swaptions presented are purchased options that have the right to enter into a pay-fixed swap.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Three Months Ended September 30, 2019 Total realized/unrealized gains (losses) Fair value as of June 30, 2019 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2019 Assets Fixed Maturities, AFS ABS $ 5 $ — $ — $ — $ — $ — $ — $ (5 ) $ — CLOs 286 — — 92 (8 ) — — (74 ) 296 CMBS 35 — — 10 (1 ) — — (24 ) 20 Corporate 568 (3 ) — 166 (7 ) (4 ) 15 (12 ) 723 Foreign Govt./Govt. Agencies 3 — — — — — — — 3 RMBS 758 — (3 ) — (51 ) — — (90 ) 614 Total Fixed Maturities, AFS 1,655 (3 ) (3 ) 268 (67 ) (4 ) 15 (205 ) 1,656 Equity Securities, at fair value 72 (2 ) — — — — — — 70 Total Assets $ 1,727 $ (5 ) $ (3 ) $ 268 $ (67 ) $ (4 ) $ 15 $ (205 ) $ 1,726 Liabilities Contingent Consideration (21 ) — — — — — — — (21 ) Derivatives, net [4] Equity (3 ) (2 ) — — — — — — (5 ) Total Derivatives, net [4] (3 ) (2 ) — — — — — — (5 ) Total Liabilities $ (24 ) $ (2 ) $ — $ — $ — $ — $ — $ — $ (26 ) Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Nine Months Ended September 30, 2019 Total realized/unrealized gains (losses) Fair value as of January 1, 2019 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2019 Assets Fixed Maturities, AFS ABS $ 10 $ — $ — $ 5 $ (1 ) $ — $ — $ (14 ) $ — CLOs 100 — — 329 (18 ) (6 ) — (109 ) 296 CMBS 12 — 1 34 (3 ) — — (24 ) 20 Corporate 520 (4 ) 9 261 (13 ) (68 ) 61 (43 ) 723 Foreign Govt./Govt. Agencies 3 — — — — — — — 3 RMBS 920 1 (5 ) 134 (163 ) (35 ) — (238 ) 614 Total Fixed Maturities, AFS 1,565 (3 ) 5 763 (198 ) (109 ) 61 (428 ) 1,656 Equity Securities, at fair value 77 (3 ) — 9 — (13 ) — — 70 Derivatives, net [4] Interest rate 1 (1 ) — — — — — — — Total Derivatives, net [4] 1 (1 ) — — — — — — — Total Assets $ 1,643 $ (7 ) $ 5 $ 772 $ (198 ) $ (122 ) $ 61 $ (428 ) $ 1,726 Liabilities Contingent Consideration (35 ) (6 ) — — 20 — — — (21 ) Derivatives, net [4] Equity 3 (8 ) — — — — — — (5 ) Total Derivatives, net [4] 3 (8 ) — — — — — — (5 ) Total Liabilities $ (32 ) $ (14 ) $ — $ — $ 20 $ — $ — $ — $ (26 ) Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Three Months Ended September 30, 2018 Total realized/unrealized gains (losses) Fair value as of June 30, 2018 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2018 Assets Fixed Maturities, AFS ABS $ 57 $ — $ — $ 39 $ (2 ) $ — $ 9 $ (49 ) $ 54 CLOs 159 — — 211 — — — (74 ) 296 CMBS 28 (1 ) 1 — (1 ) — — (5 ) 22 Corporate 559 — (2 ) 12 (2 ) (12 ) — (4 ) 551 Foreign Govt./Govt. Agencies 3 — — — — — — — 3 Municipal 9 — — — — — — — 9 RMBS 1,137 — (3 ) — (77 ) (26 ) — (97 ) 934 Total Fixed Maturities, AFS 1,952 (1 ) (4 ) 262 (82 ) (38 ) 9 (229 ) 1,869 Equity Securities, at fair value 66 — — 12 — — — — 78 Derivatives, net [4] Equity 1 — — — — — — — 1 Interest rate 2 — — — — — — — 2 Total Derivatives, net [4] 3 — — — — — — — 3 Total Assets $ 2,021 $ (1 ) $ (4 ) $ 274 $ (82 ) $ (38 ) $ 9 $ (229 ) $ 1,950 Liabilities Contingent Consideration (31 ) (1 ) — — — — — — (32 ) Total Liabilities $ (31 ) $ (1 ) $ — $ — $ — $ — $ — $ — $ (32 ) Fair Value Rollforwards for Financial Instruments Classified as Level 3 for the Nine Months Ended September 30, 2018 Total realized/unrealized gains (losses) Fair value as of January 1, 2018 Included in net income [1] Included in OCI [2] Purchases Settlements Sales Transfers into Level 3 [3] Transfers out of Level 3 [3] Fair value as of September 30, 2018 Assets Fixed Maturities, AFS ABS $ 19 $ — $ — $ 89 $ (5 ) $ — $ 12 $ (61 ) $ 54 CLOs 95 — — 309 — (4 ) — (104 ) 296 CMBS 69 (1 ) — 25 (4 ) (8 ) — (59 ) 22 Corporate 520 1 (10 ) 143 (34 ) (43 ) 15 (41 ) 551 Foreign Govt./Govt. Agencies 2 — — 1 — — — — 3 Municipal 17 — (1 ) — — — — (7 ) 9 RMBS 1,230 — (10 ) 170 (251 ) (27 ) — (178 ) 934 Total Fixed Maturities, AFS 1,952 — (21 ) 737 (294 ) (82 ) 27 (450 ) 1,869 Equity Securities, at fair value 76 28 1 13 — (40 ) — — 78 Derivatives, net [4] Equity 1 1 — 1 — (2 ) — — 1 Interest rate 1 1 — — — — — — 2 Total Derivatives, net [4] 2 2 — 1 — (2 ) — — 3 Total Assets $ 2,030 $ 30 $ (20 ) $ 751 $ (294 ) $ (124 ) $ 27 $ (450 ) $ 1,950 Liabilities Contingent Consideration (29 ) (3 ) — — — — — — (32 ) Total Liabilities $ (29 ) $ (3 ) $ — $ — $ — $ — $ — $ — $ (32 ) [1] Amounts in these columns are generally reported in net realized capital gains (losses). All amounts are before income taxes. [2] All amounts are before income taxes. [3] Transfers in and/or (out) of Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing inputs. [4] Derivative instruments are reported in this table on a net basis for asset (liability) positions and reported in the Condensed Consolidated Balance Sheets in other investments and other liabilities. Changes in Unrealized Gains (Losses) for Financial Instruments Classified as Level 3 Still Held at End of Period Three months ended September 30, Nine months ended September 30, 2019 2018 2019 2018 2019 2018 2019 2018 Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Changes in Unrealized Gain/(Loss) included in Net Income [1] [2] Changes in Unrealized Gain/(Loss) included in OCI [3] Assets Fixed Maturities, AFS CLOs $ — $ — $ — $ — $ — $ — $ 1 $ — CMBS — — — 1 — — — 1 Corporate (2 ) — — (2 ) (3 ) — 8 (11 ) Foreign Govt./Govt. Agencies — — — — — — 1 — RMBS — — (3 ) (3 ) — — (4 ) (10 ) Total Fixed Maturities, AFS (2 ) — (3 ) (4 ) (3 ) — 6 (20 ) Equity Securities, at fair value (2 ) — — — (2 ) — — — Derivatives, net Equity — (1 ) — — — (1 ) — — Interest rate — — — — (1 ) — — — Total Derivatives, net — (1 ) — — (1 ) (1 ) — — Total Assets $ (4 ) $ (1 ) $ (3 ) $ (4 ) $ (6 ) $ (1 ) $ 6 $ (20 ) Liabilities Contingent Consideration — (1 ) — — (6 ) (3 ) — — Derivatives, net Equity (2 ) — — — (8 ) — — — Total Derivatives, net (2 ) — — — (8 ) — — — Total Liabilities $ (2 ) $ (1 ) $ — $ — $ (14 ) $ (3 ) $ — $ — [1] All amounts in these rows are reported in net realized capital gains (losses). All amounts are before income taxes. [2] Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein. [3] Changes in unrealized gain (loss) on fixed maturities, AFS are reported in changes in net unrealized gain on securities in the Condensed Consolidated Statements of Comprehensive Income. Changes in interest rate derivatives are reported in changes in net gain on cash flow hedging instruments in the Condensed Consolidated Statements of Comprehensive Income.
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	Financial Assets and Liabilities Not Carried at Fair Value September 30, 2019 December 31, 2018 Fair Value Hierarchy Level Carrying Amount Fair Value Fair Value Hierarchy Level Carrying Amount Fair Value Assets Mortgage loans Level 3 $ 3,736 $ 3,900 Level 3 $ 3,704 $ 3,746 Liabilities Other policyholder funds and benefits payable Level 3 $ 772 $ 774 Level 3 $ 774 $ 775 Senior notes [1] Level 2 $ 3,757 $ 4,416 Level 2 $ 3,589 $ 3,887 Junior subordinated debentures [1] Level 2 $ 1,089 $ 1,122 Level 2 $ 1,089 $ 1,052 [1] Included in long-term debt in the Condensed Consolidated Balance Sheets, except for current maturities, which are included in short-term debt.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2019
Investments [Abstract]
Net Realized Capital Gains (Losses)	Net Realized Capital Gains Three Months Ended September 30, Nine Months Ended September 30, (Before tax) 2019 2018 2019 2018 Gross gains on sales $ 77 $ 26 $ 190 $ 91 Gross losses on sales (4 ) (41 ) (44 ) (129 ) Equity securities [1] 19 46 181 88 Net OTTI losses recognized in earnings (1 ) (1 ) (3 ) (1 ) Valuation allowances on mortgage loans — — 1 — Transactional foreign currency revaluation — — — 1 Non-qualifying foreign currency derivatives 2 1 2 2 Other, net [2] (4 ) 7 5 8 Net realized capital gains $ 89 $ 38 $ 332 $ 60 [1] Includes all changes in fair value and trading gains and losses for equity securities. The net unrealized gain (loss) on equity securities included in net realized capital gains (losses) related to equity securities still held as of September 30, 2019 , were $17 and $100 for the three and nine months ended September 30, 2019 , respectively. The net unrealized gain (loss) on equity securities included in net realized capital gains (losses) related to equity securities still held as of September 30, 2018 , were $41 and $50 for the three and nine months ended September 30, 2018 , respectively. [2] Includes gains (losses) on non-qualifying derivatives, excluding foreign currency derivatives, of $(7) and $8 , respectively, for the three months ended September 30, 2019 and 2018 . For the nine months ended September 30, 2019 and 2018 , the non-qualifying derivatives, excluding foreign currency derivatives, were $1 and $6 respectively.
Impairments	Impairments in Earnings by Type Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Credit impairments $ 1 $ 1 $ 3 $ 1 Total impairments $ 1 $ 1 $ 3 $ 1 Cumulative Credit Impairments Three Months Ended September 30, Nine Months Ended September 30, (Before tax) 2019 2018 2019 2018 Balance as of beginning of period $ (18 ) $ (20 ) $ (19 ) $ (25 ) Additions for credit impairments recognized on [1]: Securities not previously impaired (1 ) — (3 ) — Securities previously impaired — (1 ) — (1 ) Reductions for credit impairments previously recognized on: Securities that matured or were sold during the period — 1 3 6 Balance as of end of period $ (19 ) $ (20 ) $ (19 ) $ (20 ) [1] These additions are included in the net OTTI losses recognized in earnings in the Condensed Consolidated Statements of Operations.
Schedule of Available-for-sale Securities	AFS Securities by Type September 30, 2019 December 31, 2018 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Non-Credit OTTI [1] Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Non-Credit OTTI [1] ABS $ 1,315 $ 23 $ (1 ) $ 1,337 $ — $ 1,272 $ 5 $ (1 ) $ 1,276 $ — CLOs 2,162 4 (8 ) 2,158 — 1,455 2 (20 ) 1,437 — CMBS 4,067 193 (6 ) 4,254 (4 ) 3,581 35 (64 ) 3,552 (5 ) Corporate 16,867 970 (36 ) 17,801 — 13,696 148 (446 ) 13,398 — Foreign govt./govt. agencies 1,053 65 (1 ) 1,117 — 866 7 (26 ) 847 — Municipal 9,095 801 (1 ) 9,895 — 9,972 421 (47 ) 10,346 — RMBS 4,626 107 (1 ) 4,732 — 3,270 44 (35 ) 3,279 — U.S. Treasuries 989 106 — 1,095 — 1,491 41 (15 ) 1,517 — Total fixed maturities, AFS $ 40,174 $ 2,269 $ (54 ) $ 42,389 $ (4 ) $ 35,603 $ 703 $ (654 ) $ 35,652 $ (5 ) [1] Represents the amount of cumulative non-credit OTTI losses recognized in OCI on securities that also had credit impairments. These losses are included in gross unrealized losses as of September 30, 2019 and December 31, 2018 .
Investments by Contractual Maturity Year	Fixed maturities, AFS, by Contractual Maturity Year September 30, 2019 December 31, 2018 Amortized Cost Fair Value Amortized Cost Fair Value One year or less $ 1,226 $ 1,233 $ 999 $ 1,002 Over one year through five years 7,144 7,333 5,786 5,791 Over five years through ten years 7,405 7,812 6,611 6,495 Over ten years 12,229 13,530 12,629 12,820 Subtotal 28,004 29,908 26,025 26,108 Mortgage-backed and asset-backed securities 12,170 12,481 9,578 9,544 Total fixed maturities, AFS $ 40,174 $ 42,389 $ 35,603 $ 35,652
Unrealized Gain (Loss) on Investments [Table Text Block]	Unrealized Loss Aging for AFS Securities by Type and Length of Time as of September 30, 2019 Less Than 12 Months 12 Months or More Total Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses ABS $ 144 $ 143 $ (1 ) $ 11 $ 11 $ — $ 155 $ 154 $ (1 ) CLOs 1,109 1,105 (4 ) 429 425 (4 ) 1,538 1,530 (8 ) CMBS 88 87 (1 ) 31 26 (5 ) 119 113 (6 ) Corporate 930 918 (12 ) 497 473 (24 ) 1,427 1,391 (36 ) Foreign govt./govt. agencies 58 58 — 39 38 (1 ) 97 96 (1 ) Municipal 128 127 (1 ) — — — 128 127 (1 ) RMBS 166 165 (1 ) 69 69 — 235 234 (1 ) U.S. Treasuries 37 37 — 119 119 — 156 156 — Total fixed maturities, AFS in an unrealized loss position $ 2,660 $ 2,640 $ (20 ) $ 1,195 $ 1,161 $ (34 ) $ 3,855 $ 3,801 $ (54 ) Unrealized Loss Aging for AFS Securities by Type and Length of Time as of December 31, 2018 Less Than 12 Months 12 Months or More Total Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses Amortized Cost Fair Value Unrealized Losses ABS $ 566 $ 566 $ — $ 113 $ 112 $ (1 ) $ 679 $ 678 $ (1 ) CLOs 1,358 1,338 (20 ) 7 7 — 1,365 1,345 (20 ) CMBS 896 882 (14 ) 1,129 1,079 (50 ) 2,025 1,961 (64 ) Corporate 7,174 6,903 (271 ) 2,541 2,366 (175 ) 9,715 9,269 (446 ) Foreign govt./govt. agencies 407 391 (16 ) 203 193 (10 ) 610 584 (26 ) Municipal 1,643 1,613 (30 ) 292 275 (17 ) 1,935 1,888 (47 ) RMBS 1,344 1,329 (15 ) 648 628 (20 ) 1,992 1,957 (35 ) U.S. Treasuries 497 492 (5 ) 339 329 (10 ) 836 821 (15 ) Total fixed maturities, AFS in an unrealized loss position $ 13,885 $ 13,514 $ (371 ) $ 5,272 $ 4,989 $ (283 ) $ 19,157 $ 18,503 $ (654 )
Schedule of Valuation Allowance for Impairment of Recognized Servicing Assets	Valuation Allowance Activity 2019 2018 Balance, as of January 1 $ (1 ) $ (1 ) Reversals 1 — Deductions — — Balance, as of September 30 $ — $ (1 )
Loans Credit Quality	Mortgage Loans Credit Quality September 30, 2019 December 31, 2018 Loan-to-value Carrying Value Avg. Debt-Service Coverage Ratio Carrying Value Avg. Debt-Service Coverage Ratio 65% - 80% 481 1.53x 386 1.60x Less than 65% 3,255 2.52x 3,318 2.59x Total mortgage loans $ 3,736 2.39x $ 3,704 2.49x Mortgage Loans by Region September 30, 2019 December 31, 2018 Carrying Value Percent of Total Carrying Value Percent of Total East North Central $ 274 7.3 % $ 250 6.8 % Middle Atlantic 306 8.2 % 270 7.3 % Mountain 63 1.7 % 30 0.8 % New England 345 9.2 % 330 8.9 % Pacific 835 22.4 % 917 24.8 % South Atlantic 743 19.9 % 712 19.2 % West North Central 121 3.2 % 148 4.0 % West South Central 406 10.9 % 420 11.3 % Other [1] 643 17.2 % 627 16.9 % Total mortgage loans $ 3,736 100.0 % $ 3,704 100.0 % [1] Primarily represents loans collateralized by multiple properties in various regions. Mortgage Loans by Property Type September 30, 2019 December 31, 2018 Carrying Value Percent of Total Carrying Percent of Total Commercial Industrial $ 1,156 30.9 % $ 1,108 29.9 % Multifamily 1,156 30.9 % 1,138 30.7 % Office 719 19.3 % 708 19.1 % Retail 430 11.5 % 392 10.6 % Single Family 135 3.6 % 82 2.2 % Other 140 3.8 % 276 7.5 % Total mortgage loans $ 3,736 100.0 % $ 3,704 100.0 %
Securities Lending and Repurchase Agreements [Table Text Block]	Payables for Collateral on Investments September 30, 2019 December 31, 2018 Fair Value Fair Value Securities Lending Transactions: Gross amount of securities on loan $ 603 $ 820 Gross amount of associated liability for collateral received [1] $ 618 $ 840 Repurchase agreements: Gross amount of recognized liabilities for repurchase agreements $ — $ 72 Gross amount of collateral pledged related to repurchase agreements [2] $ — $ 73 Gross amount of recognized receivables for reverse repurchase agreements $ 52 $ 64 [1] Cash collateral received is reinvested in fixed maturities, AFS and short-term investments which are included in the Condensed Consolidated Balance Sheets. Amount includes additional securities collateral received of $0 and $3 which are excluded from the Company's Condensed Consolidated Balance Sheets as of September 30, 2019 and December 31, 2018 , respectively. [2] Collateral pledged is included within fixed maturities, AFS and short-term investments in the Company's Condensed Consolidated Balance Sheets.

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Balance Sheet Presentation	Derivative Balance Sheet Presentation Net Derivatives Asset Derivatives Liability Derivatives Notional Amount Fair Value Fair Value Fair Value Hedge Designation/ Derivative Type Sep. 30, 2019 Dec. 31, 2018 Sep. 30, 2019 Dec. 31, 2018 Sep. 30, 2019 Dec. 31, 2018 Sep. 30, 2019 Dec. 31, 2018 Cash flow hedges Interest rate swaps $ 2,040 $ 2,040 $ — $ 1 $ — $ 2 $ — $ (1 ) Foreign currency swaps 242 153 7 (6 ) 9 2 (2 ) (8 ) Total cash flow hedges 2,282 2,193 7 (5 ) 9 4 (2 ) (9 ) Non-qualifying strategies Interest rate contracts Interest rate swaps and futures 8,844 8,451 (70 ) (62 ) 2 8 (72 ) (70 ) Foreign exchange contracts Foreign currency swaps and forwards 454 287 1 (1 ) 1 — — (1 ) Credit contracts Credit derivatives that purchase credit protection 353 6 (2 ) — — — (2 ) — Credit derivatives that assume credit risk [1] 521 1,102 10 3 10 8 — (5 ) Credit derivatives in offsetting positions 32 41 — — 5 6 (5 ) (6 ) Equity contracts Equity index swaps and options 715 211 (5 ) 4 8 5 (13 ) (1 ) Total non-qualifying strategies 10,919 10,098 (66 ) (56 ) 26 27 (92 ) (83 ) Total cash flow hedges and non-qualifying strategies $ 13,201 $ 12,291 $ (59 ) $ (61 ) $ 35 $ 31 $ (94 ) $ (92 ) Balance Sheet Location Fixed maturities, available-for-sale $ 225 $ 153 $ — $ — $ — $ — $ — $ — Other investments 1,305 9,864 12 7 15 23 (3 ) (16 ) Other liabilities 11,671 2,274 (71 ) (68 ) 20 8 (91 ) (76 ) Total derivatives $ 13,201 $ 12,291 $ (59 ) $ (61 ) $ 35 $ 31 $ (94 ) $ (92 ) [1] The derivative instruments related to this strategy are held for other investment purposes.
Offsetting Liabilities	Offsetting Derivative Assets and Liabilities (i) (ii) (iii) = (i) - (ii) (iv) (v) = (iii) - (iv) Net Amounts Presented in the Statement of Financial Position Collateral Disallowed for Offset in the Statement of Financial Position Gross Amounts of Recognized Assets (Liabilities) Gross Amounts Offset in the Statement of Financial Position Derivative Assets [1] (Liabilities) [2] Accrued Interest and Cash Collateral (Received) [3] Pledged [2] Financial Collateral (Received) Pledged [4] Net Amount As of September 30, 2019 Other investments $ 35 $ 32 $ 12 $ (9 ) $ 1 $ 2 Other liabilities $ (94 ) $ (12 ) $ (71 ) $ (11 ) $ (73 ) $ (9 ) As of December 31, 2018 Other investments $ 31 $ 26 $ 7 $ (2 ) $ 2 $ 3 Other liabilities $ (92 ) $ (20 ) $ (68 ) $ (4 ) $ (65 ) $ (7 ) [1] Included in other investments in the Company's Condensed Consolidated Balance Sheets. [2] Included in other liabilities in the Company's Condensed Consolidated Balance Sheets and is limited to the net derivative payable associated with each counterparty. [3] Included in other investments in the Company's Condensed Consolidated Balance Sheets and is limited to the net derivative receivable associated with each counterparty. [4] Excludes collateral associated with exchange-traded derivative instruments.
Derivatives in Cash Flow Hedging Relationships	Gain (Loss) Recognized in OCI Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Interest rate swaps $ — $ — $ 20 $ (16 ) Foreign currency swaps 10 — 14 1 Total $ 10 $ — $ 34 $ (15 ) Gain (Loss) Reclassified from AOCI into Income Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Net Realized Capital Gain/(Loss) Net Investment Income Interest Expense Interest rate swaps $ — $ 1 $ — $ — $ 7 $ — $ 2 $ 1 $ 1 $ 1 $ 24 $ — Foreign currency swaps — 1 — — — — — 2 — — — — Total $ — $ 2 $ — $ — $ 7 $ — $ 2 $ 3 $ 1 $ 1 $ 24 $ — Total amounts presented on the Condensed Consolidated Statement of Operations $ 89 $ 490 $ 67 $ 38 $ 444 $ 69 $ 332 $ 1,448 $ 194 $ 60 $ 1,323 $ 228
Non-Qualifying Strategies Recognized within Net Realized Capital Gains (Losses)	Non-qualifying Strategies Recognized within Net Realized Capital Gains (Losses) Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Foreign exchange contracts Foreign currency swaps and forwards $ 2 $ 1 $ 2 $ 2 Other non-qualifying derivatives Interest rate contracts Interest rate swaps, swaptions, and futures (5 ) 1 (20 ) 7 Credit contracts Credit derivatives that purchase credit protection (1 ) — (1 ) — Credit derivatives that assume credit risk — 8 27 — Equity contracts Equity index swaps and options (1 ) (1 ) (5 ) (1 ) Total other non-qualifying derivatives (7 ) 8 1 6 Total [1] $ (5 ) $ 9 $ 3 $ 8 [1] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 5 - Fair Value Measurements of Notes to Condensed Consolidated Financial Statements.
Credit Derivatives by Type	Credit Risk Assumed Derivatives by Type Underlying Referenced Credit Obligation(s) [1] Notional Amount [2] Fair Value Weighted Average Years to Maturity Type Average Credit Rating Offsetting Notional Amount [3] Offsetting Fair Value [3] As of September 30, 2019 Single name credit default swaps Investment grade risk exposure $ 121 $ 2 5 years Corporate Credit A- $ — $ — Basket credit default swaps [4] Investment grade risk exposure 400 8 5 years Corporate Credit BBB+ — — Investment grade risk exposure 1 — Less than 1 year CMBS Credit A- 1 — Below investment grade risk exposure 15 (5 ) Less than 1 year CMBS Credit CCC- 15 5 Total [5] $ 537 $ 5 $ 16 $ 5 As of December 31, 2018 Single name credit default swaps Investment grade risk exposure $ 169 $ 2 4 years Corporate Credit/ A $ — $ — Basket credit default swaps [4] Investment grade risk exposure 799 (1 ) 6 years Corporate Credit BBB+ — — Below investment grade risk exposure 125 2 5 years Corporate Credit B+ — — Investment grade risk exposure 11 — 5 years CMBS Credit A- 2 — Below investment grade risk exposure 19 (6 ) Less than 1 year CMBS Credit CCC 19 6 Total [5] $ 1,123 $ (3 ) $ 21 $ 6 [1] The average credit ratings are based on availability and are generally the midpoint of the available ratings among Moody’s, S&P and Fitch. If no rating is available from a rating agency, then an internally developed rating is used. [2] Notional amount is equal to the maximum potential future loss amount. These derivatives are governed by agreements and applicable law, which include collateral posting requirements. There is no additional specific collateral related to these contracts or recourse provisions included in the contracts to offset losses. [3] The Company has entered into offsetting credit default swaps to terminate certain existing credit default swaps, thereby offsetting the future changes in value of, or losses paid related to, the original swap. [4] Comprised of swaps of standard market indices of diversified portfolios of corporate and CMBS issuers referenced through credit default swaps. These swaps are subsequently valued based upon the observable standard market index. [5] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 5 - Fair Value Measurements of Notes to Condensed Consolidated Financial Statements.

Reserve for Unpaid Losses and_2

Reserve for Unpaid Losses and Loss Adjustment Expenses (Tables)	9 Months Ended
	Sep. 30, 2019
Liabilities for Unpaid Losses and Loss Adjustment Expenses	Unfavorable (Favorable) Prior Accident Year Development For the nine months ended September 30, 2019 2018 Workers’ compensation $ (90 ) $ (97 ) Workers’ compensation discount accretion 25 30 General liability 62 32 Marine 8 — Package business (32 ) (16 ) Commercial property (16 ) (10 ) Professional liability 32 (12 ) Bond (2 ) — Assumed Reinsurance 3 — Automobile liability - Commercial Lines 27 (15 ) Automobile liability - Personal Lines (28 ) (10 ) Homeowners — (20 ) Net asbestos reserves — — Net environmental reserves — — Catastrophes (27 ) (47 ) Uncollectible reinsurance — 22 Other reserve re-estimates, net 15 4 Total prior accident year development [1] $ (23 ) $ (139 )
Property, Liability and Casualty Insurance Product Line
Liabilities for Unpaid Losses and Loss Adjustment Expenses	Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the nine months ended September 30, 2019 2018 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 24,584 $ 23,775 Reinsurance and other recoverables 4,232 3,957 Beginning liabilities for unpaid losses and loss adjustment expenses, net 20,352 19,818 Navigators Group acquisition 2,001 — Provision for unpaid losses and loss adjustment expenses Current accident year 5,448 5,151 Prior accident year development (23 ) (139 ) Total provision for unpaid losses and loss adjustment expenses 5,425 5,012 Payments Current accident year (1,549 ) (1,647 ) Prior accident years (3,403 ) (3,166 ) Total payments (4,952 ) (4,813 ) Foreign currency adjustment (12 ) — Ending liabilities for unpaid losses and loss adjustment expenses, net 22,814 20,017 Reinsurance and other recoverables 5,083 3,780 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 27,897 $ 23,797
Group Insurance Policy [Member]
Liabilities for Unpaid Losses and Loss Adjustment Expenses	Rollforward of Liabilities for Unpaid Losses and Loss Adjustment Expenses For the nine months ended September 30, 2019 2018 Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 8,445 $ 8,512 Reinsurance recoverables 239 209 Beginning liabilities for unpaid losses and loss adjustment expenses, net 8,206 8,303 Aetna U.S. group life and disability business acquisition — 42 Provision for unpaid losses and loss adjustment expenses Current incurral year 3,351 3,423 Prior year's discount accretion 169 175 Prior incurral year development [1] (321 ) (284 ) Total provision for unpaid losses and loss adjustment expenses [2] 3,199 3,314 Payments Current incurral year (1,603 ) (1,659 ) Prior incurral years (1,743 ) (1,741 ) Total payments (3,346 ) (3,400 ) Ending liabilities for unpaid losses and loss adjustment expenses, net 8,059 8,259 Reinsurance recoverables 231 241 Ending liabilities for unpaid losses and loss adjustment expenses, gross $ 8,290 $ 8,500 [1] Prior incurral year development represents the change in estimated ultimate incurred losses and loss adjustment expenses for prior incurral years on a discounted basis. [2] Includes unallocated loss adjustment expenses of $130 and $131 for the nine months ended September 30, 2019 and 2018

Reserves for Future Policy Bene

Reserves for Future Policy Benefits (Tables)	9 Months Ended
	Sep. 30, 2019
Insurance Loss Reserves [Abstract]
Changes in Reserves for Future Policy Benefits	Changes in Reserves for Future Policy Benefits [1] Liability balance, as of January 1, 2019 $ 642 Incurred 63 Paid (77 ) Change in unrealized investment gains and losses 17 Liability balance, as of September 30, 2019 $ 645 Reinsurance recoverable asset, as of January 1, 2019 $ 27 Incurred 2 Paid — Reinsurance recoverable asset, as of September 30, 2019 $ 29 Liability balance, as of January 1, 2018 $ 713 Incurred 10 Paid (25 ) Change in unrealized investment gains and losses (42 ) Liability balance, as of September 30, 2018 $ 656 Reinsurance recoverable asset, as of January 1, 2018 $ 26 Incurred 10 Paid (1 ) Reinsurance recoverable asset, as of September 30, 2018 $ 35 [1]Reserves for future policy benefits includes paid-up life insurance and whole-life policies resulting from conversion from group life policies included within the Group Benefits segment and reserves for run-off structured settlement and terminal funding agreement liabilities which are in the Corporate category.

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax Rate Reconciliation	Income Tax Rate Reconciliation Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Tax provision at U.S. federal statutory rate $ 138 $ 112 $ 396 $ 333 Tax-exempt interest (14 ) (16 ) (43 ) (50 ) Dividends received deduction ("DRD") (3 ) — (5 ) — Executive compensation — 1 5 8 Stock-based compensation (3 ) (3 ) (7 ) (5 ) Tax Reform — 11 — 13 Other — (2 ) 1 (2 ) Provision for income taxes $ 118 $ 103 $ 347 $ 297
Roll-forward of Unrecognized Tax Benefits	Rollforward of Unrecognized Tax Benefits Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Balance, beginning of period $ 14 $ 9 $ 14 $ 9 Gross increases - tax positions in prior period — 5 — 5 Gross decreases - tax positions in prior period — — — — Balance, end of period $ 14 $ 14 $ 14 $ 14

Equity Equity Repurchase Activi

Equity Equity Repurchase Activity (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Class of Treasury Stock [Table Text Block]	Equity Repurchase Activity and Remaining Repurchase Capacity Three months ended Common Shares Repurchased Cost of Shares Repurchased Average Price Paid per Share Remaining Capacity Under Share Repurchase Authorization (In millions, except for per share data) June 30, 2019 0.5 $ 27 $ 53.84 $ 973 September 30, 2019 1.1 $ 63 $ 58.50 $ 910 Total 1.6 $ 90

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income Loss (Tables)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in AOCI, net of tax	Changes in AOCI, Net of Tax for the Three Months Ended September 30, 2018 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 211 $ (3 ) $ (12 ) $ 33 $ (1,582 ) $ (1,353 ) OCI before reclassifications (183 ) (1 ) 1 1 1 (181 ) Amounts reclassified from AOCI 12 — (6 ) — 9 15 OCI, net of tax (171 ) (1 ) (5 ) 1 10 (166 ) Ending balance $ 40 $ (4 ) $ (17 ) $ 34 $ (1,572 ) $ (1,519 ) Changes in AOCI, Net of Tax for the Nine Months Ended September 30, 2018 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 1,931 $ (3 ) $ 18 $ 34 $ (1,317 ) $ 663 Cumulative effect of accounting changes, net of tax [1] 273 — 2 4 (284 ) (5 ) Adjusted balance, beginning of period 2,204 (3 ) 20 38 (1,601 ) 658 OCI before reclassifications [2] (2,213 ) — (12 ) (4 ) — (2,229 ) Amounts reclassified from AOCI 49 (1 ) (25 ) — 29 52 OCI, net of tax (2,164 ) (1 ) (37 ) (4 ) 29 (2,177 ) Ending balance $ 40 $ (4 ) $ (17 ) $ 34 $ (1,572 ) $ (1,519 ) [1] Includes reclassification to retained earnings of $88 of stranded tax effects and $93 of net unrealized gains, net of tax, related to equity securities. For further discussion of these reclassifications, see Note 1 - Basis of Presentation and Significant Accounting Policies of Notes to the Consolidated Financial Statements included in The Hartford's 2018 Form 10-K Annual Report. [2]The reduction in AOCI included the effect of removing $758 of Talcott Resolution AOCI from the balance sheet when the business was sold effective May 31, 2018. Changes in AOCI, Net of Tax for the Three Months Ended September 30, 2019 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 1,367 $ (3 ) $ 11 $ 34 $ (1,607 ) $ (198 ) OCI before reclassifications 458 — 8 (4 ) 1 463 Amounts reclassified from AOCI (57 ) — (2 ) — 8 (51 ) OCI, net of tax 401 — 6 (4 ) 9 412 Ending balance $ 1,768 $ (3 ) $ 17 $ 30 $ (1,598 ) $ 214 Changes in AOCI, Net of Tax for the Nine Months Ended September 30, 2019 Changes in Net Unrealized Gain on Securities OTTI Losses in OCI Net Gain on Cash Flow Hedging Instruments Foreign Currency Translation Adjustments Pension and Other Postretirement Plan Adjustments AOCI, net of tax Beginning balance $ 24 $ (4 ) $ (5 ) $ 30 $ (1,624 ) $ (1,579 ) OCI before reclassifications 1,857 1 27 — 1 1,886 Amounts reclassified from AOCI (113 ) — (5 ) — 25 (93 ) OCI, net of tax 1,744 1 22 — 26 1,793 Ending balance $ 1,768 $ (3 ) $ 17 $ 30 $ (1,598 ) $ 214
Reclassifications from AOCI	Reclassifications from AOCI Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Affected Line Item in the Condensed Consolidated Statement of Operations Net Unrealized Loss on Securities Available-for-sale securities $ (15 ) $ (59 ) Net realized capital gains (15 ) (59 ) Total before tax (3 ) (12 ) Income tax expense — (2 ) Income from discontinued operations, net of tax $ (12 ) $ (49 ) Net income OTTI Losses in OCI Other than temporary impairments $ — $ — Net realized capital gains — — Income before taxes — — Income tax expense (benefit) $ — $ 1 Income from discontinued operations, net of tax $ — $ 1 Net Income (loss) Net Gains on Cash Flow Hedging Instruments Interest rate swaps $ — $ 1 Net realized capital gains Interest rate swaps 7 24 Net investment income 7 25 Total before tax 1 5 Income tax expense (benefit) — 5 Income from discontinued operations, net of tax $ 6 $ 25 Net income Pension and Other Postretirement Plan Adjustments Amortization of prior service credit $ 2 $ 5 Insurance operating costs and other expenses Amortization of actuarial loss (14 ) (42 ) Insurance operating costs and other expenses (12 ) (37 ) Total before tax (3 ) (8 ) Income tax expense $ (9 ) $ (29 ) Net income Total amounts reclassified from AOCI $ (15 ) $ (52 ) Net income Reclassifications from AOCI Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Affected Line Item in the Condensed Consolidated Statement of Operations Net Unrealized Gain on Securities Available-for-sale securities $ 72 $ 143 Net realized capital gains 72 143 Total before tax 15 30 Income tax expense $ 57 $ 113 Net income Net Gains on Cash Flow Hedging Instruments Interest rate swaps $ — $ 2 Net realized capital gains Interest rate swaps 1 1 Net investment income Interest rate swaps — 1 Interest expense Foreign currency swaps 1 2 Net investment income 2 6 Total before tax — 1 Income tax expense $ 2 $ 5 Net income Pension and Other Postretirement Plan Adjustments Amortization of prior service credit $ 2 $ 5 Insurance operating costs and other expenses Amortization of actuarial loss (12 ) (37 ) Insurance operating costs and other expenses (10 ) (32 ) Total before tax (2 ) (7 ) Income tax expense $ (8 ) $ (25 ) Net income Total amounts reclassified from AOCI $ 51 $ 93 Net income

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2019
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs	Net Periodic Cost (Benefit) Pension Benefits Other Postretirement Benefits Three Months Ended September 30, Nine months ended September 30, Three Months Ended September 30, Nine months ended September 30, 2019 2018 2019 2018 2019 2018 2019 2018 Service cost $ 1 $ 1 $ 3 $ 3 $ — $ — $ — $ — Interest cost 40 36 119 107 2 1 6 4 Expected return on plan assets (57 ) (57 ) (170 ) (172 ) (1 ) (2 ) (3 ) (5 ) Amortization of prior service credit — — — — (2 ) (2 ) (5 ) (5 ) Amortization of actuarial loss 11 12 33 37 1 2 4 5 Net periodic cost (benefit) $ (5 ) $ (8 ) $ (15 ) $ (25 ) $ — $ (1 ) $ 2 $ (1 )

Business Disposition and Discon

Business Disposition and Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	Reconciliation of the Major Line Items Constituting Pretax Profit (Loss) of Discontinued Operations Three Months Ended September 30, Nine Months Ended September 30, 2018 2018 Revenues Earned premiums $ — $ 39 Fee income and other — 382 Net investment income — 519 Net realized capital gains (losses) 4 (68 ) Total revenues 4 872 Benefits, losses and expenses Benefits, losses and loss adjustment expenses — 535 Amortization of DAC — 58 Insurance operating costs and other expenses [1] (5 ) 157 Total benefits, losses and expenses (5 ) 750 Income before income taxes 9 122 Income tax expense (benefit) (7 ) 2 Income from operations of discontinued operations, net of tax 16 120 Net realized capital gain (loss) on disposal, net of tax (11 ) 202 Income from discontinued operations, net of tax $ 5 $ 322 [1]Corporate allocated overhead has been included in continuing operations. Cash Flows from Discontinued Operations Nine Months Ended September 30, 2018 Net cash provided by operating activities from discontinued operations $ 603 Net cash provided by investing activities from discontinued operations $ 463 Net cash used in financing activities from discontinued operations [1] $ (737 ) Cash paid for interest $ — [1] Excludes return of capital to parent of $619 for the nine months ended September 30, 2018.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lease, Cost	Supplemental Operating Lease Information September 30, 2019 Operating cash flows for operating leases (for the nine months ended) $ 36 Weighted-average remaining lease term in years for operating leases 6 years Weighted-average discount rate for operating leases 3.6 % Components of Lease Expense Three Months Ended September 30, Nine Months Ended September 30, 2019 2019 Operating lease cost $ 13 $ 36 Short-term lease cost — 1 Variable lease cost — 1 Sublease income (1 ) (4 ) Total lease costs included in insurance operating costs and other expenses $ 12 $ 34
Future Minimum Lease Payments	As of September 30, 2019 2019 $ 13 2020 51 2021 39 2022 33 2023 30 Thereafter 66 Total lease payments 232 Less: Discount on lease payments to present value 23 Total lease liability $ 209

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions	May 23, 2019	Jan. 01, 2019	Sep. 30, 2019	Jul. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, before Tax		$ 1
Operating Leases, Future Minimum Payments Due		160
Operating Lease, Right-of-Use Asset		150	$ 200	$ 34
Lease Incentive Receivable		$ 10
The Navigators Group, Inc. [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Business Acquisition, Share Price	$ 70
Business Combination, Consideration Transferred	$ 2,137

Business Acquisitions - Additio

Business Acquisitions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 30, 2019	May 23, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 1,913		$ 1,913			$ 1,913	$ 1,913		$ 1,290
Revenues			5,347		$ 4,842		15,379	$ 14,322
Net Income (Loss) Available to Common Stockholders, Basic			$ 524		$ 432		1,521	$ 1,611
The Navigators Group, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		May 23, 2019
Business Acquisition, Name of Acquired Entity		Navigators Group
Business Acquisition, Share Price		$ 70
Payments to Acquire Businesses, Gross		$ 2,121
Business Combination, Consideration Transferred, Other		23
Goodwill		623
Revenues						616
Net Income (Loss) Available to Common Stockholders, Basic						$ 140
Business Combination, Acquisition Related Costs							16
The Navigators Group, Inc. [Member] | Cash [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		2,098
Adverse Development Cover Navigators Group [Member]
Business Acquisition [Line Items]
Reinsurance premium				$ 91
Reinsurance Retention Policy, Amount Retained				68
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims				97
Current accident year				29
Use of Retention Layer by Acquiree Prior to Acquisition		32
Policyholder Benefits and Claims Incurred, Ceded				91
Adverse Development Cover Navigators Group [Member] | Remaining [Member]
Business Acquisition [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	$ 209
Adverse Development Cover Navigators Group [Member] | After tax [Member]
Business Acquisition [Line Items]
Reinsurance premium				72
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims				$ 77
Adverse Development Cover Navigators Group [Member] | Maximum [Member]
Business Acquisition [Line Items]
Reinsurance Retention Policy, Excess Retention, Amount Reinsured							300
Recorded by Acquiree Prior to Acquisition [Member]
Business Acquisition [Line Items]
Current accident year		$ 52
Retention Layer Above Reserve for the Covered Liabilities as of the Inception Date [Member] | Adverse Development Cover Navigators Group [Member]
Business Acquisition [Line Items]
Reinsurance Retention Policy, Amount Retained							100
Retention Layer for Reserve for the Covered Liabilities as of the Inception Date [Member] | Adverse Development Cover Navigators Group [Member]
Business Acquisition [Line Items]
Reinsurance Retention Policy, Amount Retained							$ 1,816

Business Acquisitions - Fair Va

Business Acquisitions - Fair Value of Assets Acquired and Liabilities Assumed at the Acquisition Date (Details) - USD ($) $ in Millions	Sep. 30, 2019	May 23, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 1,913		$ 1,290
The Navigators Group, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 3,848
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Premiums Receivable		492
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Reinsurance Recoverables		1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Prepaid Reinsurance Premiums		238
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		580
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		83
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets		99
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		6,440
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unpaid Losses and Loss Adjustment Expenses		2,823
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue		1,219
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		284
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets		48
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other		568
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		4,942
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		1,498
Goodwill		623
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		$ 2,121

Business Acquisitions - Intangi

Business Acquisitions - Intangible Assets Recorded in Connection with the Acquisition (Details) - The Navigators Group, Inc. [Member] $ in Millions	May 23, 2019USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 499
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 81
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	580
Lloyd's Syndicate Capacity [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	66
License [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	15
Contractual Rights [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 180
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year
Distribution relationships [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 302
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Trade Names [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 17
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years

Business Acquisitions - Expecte

Business Acquisitions - Expected Pre-tax Amortization Expense (Details) - The Navigators Group, Inc. [Member] $ in Millions	Sep. 30, 2019USD ($)
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 5
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	22
Finite-Lived Intangible Assets, Amortization Expense, Year Two	22
Finite-Lived Intangible Assets, Amortization Expense, Year Three	22
Finite-Lived Intangible Assets, Amortization Expense, Year Four	22
Contractual Rights [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	38
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	47
Finite-Lived Intangible Assets, Amortization Expense, Year Two	21
Finite-Lived Intangible Assets, Amortization Expense, Year Three	9
Finite-Lived Intangible Assets, Amortization Expense, Year Four	$ 0

Business Acquisitions - Pro For

Business Acquisitions - Pro Forma Results (Details) - The Navigators Group, Inc. [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 16,055	$ 15,404
Business Acquisition, Pro Forma Net Income (Loss)	$ 1,532	$ 1,669

Earnings (Loss) Per Common Sh_2

Earnings (Loss) Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings
Income from continuing operations, net of tax	$ 535	$ 427	$ 1,537	$ 1,289
Less: Preferred stock dividends	11	0	16	0
Income from discontinued operations, net of tax, available to common stockholders	524	427	1,521	1,289
Income from discontinued operations, net of tax, available to common stockholders	0	5	0	322
Net income available to common stockholders	$ 524	$ 432	$ 1,521	$ 1,611
Shares
Weighted average common shares outstanding, basic	361.4	358.6	361	358.1
Dilutive effect of stock-based awards under compensation plans	4	3.6	3.4	4
Dilutive effect of warrants [1]	0	1.9	0.7	2
Weighted average common shares outstanding and dilutive potential common shares	365.4	364.1	365.1	364.1
Earnings Per Share, Basic [Abstract]
Income from continuing operations, net of tax, available to common stockholders	$ 1.45	$ 1.19	$ 4.21	$ 3.60
Income from discontinued operations, net of tax, available to common stockholders	0	0.01	0	0.90
Net income available to common stockholders	1.45	1.20	4.21	4.50
Earnings Per Share, Diluted [Abstract]
Income from continuing operations, net of tax, available to common stockholders	1.43	1.17	4.17	3.54
Income from discontinued operations, net of tax, available to common stockholders	0	0.02	0	0.88
Net income available to common stockholders	$ 1.43	$ 1.19	$ 4.17	$ 4.42

Segment Information - Additiona

Segment Information - Additional Information (Details)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Number of Reportable Segments	5

Segment Information - Net Incom

Segment Information - Net Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Net income	$ 535	$ 432	$ 1,537	$ 1,611
Dividends declared on preferred stock	11	0	16	0
Net income available to common stockholders	524	432	1,521	1,611
Corporate
Segment Reporting Information [Line Items]
Net income	(99)	(35)	(142)	136
Property and Casualty, Commercial Insurance [Member]
Segment Reporting Information [Line Items]
Net income	336	289	890	959
Property and Casualty, Personal Insurance [Member]
Segment Reporting Information [Line Items]
Net income	94	51	252	146
Property & Casualty Other Operations
Segment Reporting Information [Line Items]
Net income	18	9	52	31
Group Insurance Policy [Member]
Segment Reporting Information [Line Items]
Net income	146	77	377	227
Mutual Fund [Member]
Segment Reporting Information [Line Items]
Net income	$ 40	$ 41	$ 108	$ 112

Segment Information - Revenues

Segment Information - Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Earned premiums and fee income	$ 4,724	$ 4,331	$ 13,470	$ 12,866
Net investment income	490	444	1,448	1,323
Realized Investment Gains (Losses)	89	38	332	60
Other revenues	44	29	129	73
Total revenues	5,347	4,842	15,379	14,322
Corporate
Segment Reporting Information [Line Items]
Earned premiums and fee income	18	15	43	21
Property and Casualty, Commercial Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	2,258	1,794	6,040	5,267
Property and Casualty, Commercial Insurance [Member] | Workers’ compensation
Segment Reporting Information [Line Items]
Earned premiums and fee income	825	845	2,480	2,495
Property and Casualty, Commercial Insurance [Member] | Liability
Segment Reporting Information [Line Items]
Earned premiums and fee income	330	170	731	480
Property and Casualty, Commercial Insurance [Member] | Marine
Segment Reporting Information [Line Items]
Earned premiums and fee income	59	0	86	0
Property and Casualty, Commercial Insurance [Member] | Package business
Segment Reporting Information [Line Items]
Earned premiums and fee income	376	343	1,092	1,013
Property and Casualty, Commercial Insurance [Member] | Property
Segment Reporting Information [Line Items]
Earned premiums and fee income	198	154	529	456
Property and Casualty, Commercial Insurance [Member] | Professional liability
Segment Reporting Information [Line Items]
Earned premiums and fee income	137	65	304	190
Property and Casualty, Commercial Insurance [Member] | Bond
Segment Reporting Information [Line Items]
Earned premiums and fee income	67	60	192	179
Property and Casualty, Commercial Insurance [Member] | Assumed Reinsurance
Segment Reporting Information [Line Items]
Earned premiums and fee income	75	0	104	0
Property and Casualty, Commercial Insurance [Member] | Automobile
Segment Reporting Information [Line Items]
Earned premiums and fee income	191	157	522	454
Property and Casualty, Personal Insurance [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	812	859	2,431	2,594
Property and Casualty, Personal Insurance [Member] | AARP Members [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	729	758	2,200	2,300
Property and Casualty, Personal Insurance [Member] | Property
Segment Reporting Information [Line Items]
Earned premiums and fee income	248	261	741	785
Property and Casualty, Personal Insurance [Member] | Automobile
Segment Reporting Information [Line Items]
Earned premiums and fee income	564	598	1,690	1,809
Group Insurance Policy [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	1,382	1,396	4,213	4,198
Group Insurance Policy [Member] | Group disability
Segment Reporting Information [Line Items]
Earned premiums and fee income	697	684	2,124	2,051
Group Insurance Policy [Member] | Group life
Segment Reporting Information [Line Items]
Earned premiums and fee income	621	652	1,902	1,968
Group Insurance Policy [Member] | Other
Segment Reporting Information [Line Items]
Earned premiums and fee income	64	60	187	179
Mutual Fund [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	254	267	743	786
Mutual Fund [Member] | Third party retail customers [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	231	242	674	710
Mutual Fund [Member] | Talcott Resolution [Member]
Segment Reporting Information [Line Items]
Earned premiums and fee income	$ 23	$ 25	$ 69	$ 76

Segment Information - Non-insur

Segment Information - Non-insurance Revenue from Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Insurance Commissions and Fees	$ 330	$ 344	$ 970	$ 994
Other revenues	44	29	129	73
Non-insurance revenues with customers	359	373	1,052	1,067
Installment billing fees [Member] | Operating Segments [Member] | Property and Casualty, Commercial Insurance [Member]
Segment Reporting Information [Line Items]
Insurance Commissions and Fees	8	9	26	26
Installment billing fees [Member] | Operating Segments [Member] | Property and Casualty, Personal Insurance [Member]
Segment Reporting Information [Line Items]
Insurance Commissions and Fees	9	10	28	30
Insurance servicing fees [Member] | Operating Segments [Member] | Property and Casualty, Personal Insurance [Member]
Segment Reporting Information [Line Items]
Other revenues	23	24	65	66
Administrative services fees [Member] | Operating Segments [Member] | Group Insurance Policy [Member]
Segment Reporting Information [Line Items]
Insurance Commissions and Fees	45	43	135	131
Advisor, distribution and other management fees [Member] | Operating Segments [Member] | Mutual Fund [Member]
Segment Reporting Information [Line Items]
Insurance Commissions and Fees	232	245	677	722
Other fees [Member] | Operating Segments [Member] | Mutual Fund [Member]
Segment Reporting Information [Line Items]
Insurance Commissions and Fees	22	21	65	63
Investment management and other fees [Member] | Corporate
Segment Reporting Information [Line Items]
Insurance Commissions and Fees	14	15	38	21
Transaction service fees [Member] | Corporate
Segment Reporting Information [Line Items]
Other revenues	$ 6	$ 6	$ 18	$ 8

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value by Hierarchy (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	$ 42,389	$ 35,652
Fixed maturities, FVO	39	22
Equity securities, at fair value	1,414	1,214
Derivative assets	12	7
Short-term investments	2,927	4,283
Total assets accounted for at fair value on a recurring basis	46,781	41,178
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(71)	(68)
Contingent consideration	(21)	(35)
Total liabilities accounted for at fair value on a recurring basis	(92)	(103)
Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	9	5
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(1)	(2)
Equity
Assets accounted for at fair value on a recurring basis
Derivative assets		3
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(5)	1
Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	4	(2)
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	4	(5)
Interest rate derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	(1)	1
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(69)	(62)
Asset-backed-securities (ABS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,337	1,276
Collateralized loan obligations (CLOs)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	2,158	1,437
CMBS
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	4,254	3,552
Corporate
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	17,801	13,398
Foreign government/government agencies
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,117	847
Municipal
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	9,895	10,346
Residential mortgage-backed securities (RMBS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	4,732	3,279
U.S. Treasuries
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,095	1,517
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	7	330
Fixed maturities, FVO	0	0
Equity securities, at fair value	1,196	1,093
Derivative assets	0	0
Short-term investments	1,211	1,039
Total assets accounted for at fair value on a recurring basis	2,414	2,462
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Contingent consideration	0	0
Total liabilities accounted for at fair value on a recurring basis	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity
Assets accounted for at fair value on a recurring basis
Derivative assets		0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed-securities (ABS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized loan obligations (CLOs)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | CMBS
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government/government agencies
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential mortgage-backed securities (RMBS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasuries
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	7	330
Significant Observable Inputs (Level 2)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	40,726	33,757
Fixed maturities, FVO	39	22
Equity securities, at fair value	148	44
Derivative assets	12	4
Short-term investments	1,716	3,244
Total assets accounted for at fair value on a recurring basis	42,641	37,071
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(66)	(69)
Contingent consideration	0	0
Total liabilities accounted for at fair value on a recurring basis	(66)	(69)
Significant Observable Inputs (Level 2) | Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	9	5
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(1)	(2)
Significant Observable Inputs (Level 2) | Equity
Assets accounted for at fair value on a recurring basis
Derivative assets		0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	1
Significant Observable Inputs (Level 2) | Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	4	(2)
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	4	(5)
Significant Observable Inputs (Level 2) | Interest rate derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	(1)	1
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(69)	(63)
Significant Observable Inputs (Level 2) | Asset-backed-securities (ABS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,337	1,266
Significant Observable Inputs (Level 2) | Collateralized loan obligations (CLOs)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,862	1,337
Significant Observable Inputs (Level 2) | CMBS
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	4,234	3,540
Significant Observable Inputs (Level 2) | Corporate
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	17,078	12,878
Significant Observable Inputs (Level 2) | Foreign government/government agencies
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,114	844
Significant Observable Inputs (Level 2) | Municipal
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	9,895	10,346
Significant Observable Inputs (Level 2) | Residential mortgage-backed securities (RMBS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	4,118	2,359
Significant Observable Inputs (Level 2) | U.S. Treasuries
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,088	1,187
Significant Unobservable Inputs (Level 3)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	1,656	1,565
Fixed maturities, FVO	0	0
Equity securities, at fair value	70	77
Derivative assets	0	3
Short-term investments	0	0
Total assets accounted for at fair value on a recurring basis	1,726	1,645
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(5)	1
Contingent consideration	(21)	(35)
Total liabilities accounted for at fair value on a recurring basis	(26)	(34)
Significant Unobservable Inputs (Level 3) | Credit derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) | Equity
Assets accounted for at fair value on a recurring basis
Derivative assets		3
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	(5)	0
Significant Unobservable Inputs (Level 3) | Foreign exchange derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) | Interest rate derivatives
Assets accounted for at fair value on a recurring basis
Derivative assets	0	0
Liabilities accounted for at fair value on a recurring basis
Derivative liabilities	0	1
Significant Unobservable Inputs (Level 3) | Asset-backed-securities (ABS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	10
Significant Unobservable Inputs (Level 3) | Collateralized loan obligations (CLOs)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	296	100
Significant Unobservable Inputs (Level 3) | CMBS
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	20	12
Significant Unobservable Inputs (Level 3) | Corporate
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	723	520
Significant Unobservable Inputs (Level 3) | Foreign government/government agencies
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	3	3
Significant Unobservable Inputs (Level 3) | Municipal
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities (RMBS)
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	614	920
Significant Unobservable Inputs (Level 3) | U.S. Treasuries
Assets accounted for at fair value on a recurring basis
Debt Securities, Available-for-sale	0	0
Fair Value Measured at Net Asset Value Per Share [Member]
Liabilities accounted for at fair value on a recurring basis
Deposit Assets	$ 55	$ 0

Fair Value Measurements - Signi

Fair Value Measurements - Significant Unobservable Inputs Securities (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	$ 42,389	$ 35,652
CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	4,254	3,552
Corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	17,801	13,398
RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	4,732	3,279
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	1,656	1,565
Significant Unobservable Inputs (Level 3) | CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	20	12
Significant Unobservable Inputs (Level 3) | Corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	723	520
Significant Unobservable Inputs (Level 3) | RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	614	920
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Collateralized Loan Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	$ 225
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Collateralized Loan Obligations [Member] | Measurement Input, Credit Spread [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	2.35
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Collateralized Loan Obligations [Member] | Measurement Input, Credit Spread [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	2.44
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Collateralized Loan Obligations [Member] | Measurement Input, Credit Spread [Member] | Weighted Average [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	2.40
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | CMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	$ 11	$ 2
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | CMBS | Measurement Input, Credit Spread [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	0.09	0.09
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | CMBS | Measurement Input, Credit Spread [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	18.32	10.40
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | CMBS | Measurement Input, Credit Spread [Member] | Weighted Average [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	1.97	1.82
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Corporate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	$ 508	$ 274
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Corporate | Measurement Input, Credit Spread [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	1.26	1.45
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Corporate | Measurement Input, Credit Spread [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	6.68	11.75
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Corporate | Measurement Input, Credit Spread [Member] | Weighted Average [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	2.23	2.63
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt Securities, Available-for-sale	$ 614	$ 815
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Credit Spread [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	0.15	0.12
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Credit Spread [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	2.31	2.15
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Credit Spread [Member] | Weighted Average [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Servicing Asset, Measurement Input	0.73	0.86
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Constant Prepayment Rate [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant prepayment rate [6]	1.00%	1.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Constant Prepayment Rate [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant prepayment rate [6]	11.00%	15.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Constant Prepayment Rate [Member] | Weighted Average [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant prepayment rate [6]	6.00%	6.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Default Rate [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant default rate [6]	1.00%	1.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Default Rate [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant default rate [6]	5.00%	8.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Default Rate [Member] | Weighted Average [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant default rate [6]	3.00%	3.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Loss Severity [Member] | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant default rate [6]	0.00%	0.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Loss Severity [Member] | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant default rate [6]	100.00%	100.00%
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | RMBS | Measurement Input, Loss Severity [Member] | Weighted Average [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Constant default rate [6]	72.00%	61.00%

Fair Value Measurements - Sig_2

Fair Value Measurements - Significant Unobservable Inputs Freestanding Derivatives (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs	$ 0
Equity options
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative Assets (Liabilities), at Fair Value, Net	$ (5)	$ (5)	$ 3
Interest rate swaptions [3]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Derivative Assets (Liabilities), at Fair Value, Net			$ 1
Interest rate swaptions [3] | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurements, Unobservable Swap_Curve			3.00%
Interest rate swaptions [3] | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurements, Unobservable Swap_Curve			3.00%
Interest rate swaptions [3] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurements, Unobservable Swap_Curve			3.00%
Measurement Input, Option Volatility [Member] | Equity options | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurements, Unobservable Swap_Curve		11.00%	19.00%
Measurement Input, Option Volatility [Member] | Equity options | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurements, Unobservable Swap_Curve		25.00%	21.00%
Measurement Input, Option Volatility [Member] | Equity options | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Fair Value Measurements, Unobservable Swap_Curve		15.00%	20.00%

Fair Value Measurements - Conti

Fair Value Measurements - Contingent Consideration (Details) - USD ($) $ in Millions	Jul. 29, 2016	Sep. 30, 2019	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Estimate		$ 43	$ 43
Contingent Consideration basis		2,600
Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Current		23	23
Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent Consideration basis			4,100
Paid [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent Consideration Commission payable		$ 20	$ 20
Lattice
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent Consideration	$ 60
Contingent Consideration Payment Period	4 years
Lattice | Contingent Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate			11.40%

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair Value Recurring Basis, Unobservable Input (Details) - Fair Value, Measurements, Recurring - Significant Unobservable Inputs (Level 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		$ 3		$ 3			$ 3	$ 2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings		0		2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		0		1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		0		2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3		0		0
Assets
Beginning balance	$ 1,727	2,021	$ 1,643	2,030
Total realized/unrealized gains (losses), Included in net income	(5)	(1)	(7)	30
Total realized/unrealized gains (losses), Included in OCI	(3)	(4)	5	(20)
Purchases	268	274	772	751
Settlements	(67)	(82)	(198)	(294)
Sales	(4)	(38)	(122)	(124)
Transfers into Level 3	15	9	61	27
Transfers out of Level 3	(205)	(229)	(428)	(450)
Ending balance	1,726	1,950	1,726	1,950
Liabilities
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	2	1	14	3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3		0		0
Contingent Consideration
Liabilities
Beginning balance	(21)	(31)	(35)	(29)
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	0	1	6	3
Total realized/unrealized gains (losses), Included in OCI	0	0	0	0
Purchases	0	0	0	0
Settlements	0	0	(20)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending balance	(21)	(32)	(21)	(32)
Liability [Member]
Liabilities
Beginning balance	(24)	(31)	(32)	(29)
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	2	1	14	3
Total realized/unrealized gains (losses), Included in OCI	0	0	0	0
Purchases	0	0	0	0
Settlements	0	0	(20)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending balance	(26)	(32)	(26)	(32)
Equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		1		1			1	1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings		0		1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		0		1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		0		2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3		0		0
Liabilities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3		0		0
Equity | Liability [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(5)		(5)		$ (3)	$ 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(2)		(8)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0		0
Liabilities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0		0
Interest rate derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	0	2	0	2		1	$ 2	$ 1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings		0	(1)	1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)		0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3		0	0	0
Liabilities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3		0	0	0
Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	0		0			1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings			(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales			0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3			0
Liabilities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3			0
Derivative [Member] | Liability [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(5)		(5)		$ (3)	$ 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(2)		(8)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0		0
Liabilities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0		0
Securities available-for-sale and other | Total fixed maturities, FVO
Assets
Beginning balance	1,655	1,952	1,565	1,952
Total realized/unrealized gains (losses), Included in net income	(3)	(1)	(3)	0
Total realized/unrealized gains (losses), Included in OCI	(3)	(4)	5	(21)
Purchases	268	262	763	737
Settlements	(67)	(82)	(198)	(294)
Sales	(4)	(38)	(109)	(82)
Transfers into Level 3	15	9	61	27
Transfers out of Level 3	(205)	(229)	(428)	(450)
Ending balance	1,656	1,869	1,656	1,869
Securities available-for-sale and other | ABS | Total fixed maturities, FVO
Assets
Beginning balance	5	57	10	19
Total realized/unrealized gains (losses), Included in net income	0	0	0	0
Total realized/unrealized gains (losses), Included in OCI	0	0	0	0
Purchases	0	39	5	89
Settlements	0	(2)	(1)	(5)
Sales	0	0	0	0
Transfers into Level 3	0	9	0	12
Transfers out of Level 3	(5)	(49)	(14)	(61)
Ending balance	0	54	0	54
Securities available-for-sale and other | CLOs | Total fixed maturities, FVO
Assets
Beginning balance	286	159	100	95
Total realized/unrealized gains (losses), Included in net income	0	0	0	0
Total realized/unrealized gains (losses), Included in OCI	0	0	0	0
Purchases	92	211	329	309
Settlements	(8)	0	(18)	0
Sales	0	0	(6)	(4)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(74)	(74)	(109)	(104)
Ending balance	296	296	296	296
Securities available-for-sale and other | CMBS | Total fixed maturities, FVO
Assets
Beginning balance	35	28	12	69
Total realized/unrealized gains (losses), Included in net income	0	(1)	0	(1)
Total realized/unrealized gains (losses), Included in OCI	0	1	1	0
Purchases	10	0	34	25
Settlements	(1)	(1)	(3)	(4)
Sales	0	0	0	(8)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(24)	(5)	(24)	(59)
Ending balance	20	22	20	22
Securities available-for-sale and other | Corporate | Total fixed maturities, FVO
Assets
Beginning balance	568	559	520	520
Total realized/unrealized gains (losses), Included in net income	(3)	0	(4)	1
Total realized/unrealized gains (losses), Included in OCI	0	(2)	9	(10)
Purchases	166	12	261	143
Settlements	(7)	(2)	(13)	(34)
Sales	(4)	(12)	(68)	(43)
Transfers into Level 3	15	0	61	15
Transfers out of Level 3	(12)	(4)	(43)	(41)
Ending balance	723	551	723	551
Securities available-for-sale and other | Foreign government/government agencies | Total fixed maturities, FVO
Assets
Beginning balance	3	3	3	2
Total realized/unrealized gains (losses), Included in net income	0	0	0	0
Total realized/unrealized gains (losses), Included in OCI	0	0	0	0
Purchases	0	0	0	1
Settlements	0	0	0	0
Sales	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending balance	3	3	3	3
Securities available-for-sale and other | Municipal | Total fixed maturities, FVO
Assets
Beginning balance		9		17
Total realized/unrealized gains (losses), Included in net income		0		0
Total realized/unrealized gains (losses), Included in OCI		0		(1)
Purchases		0		0
Settlements		0		0
Sales		0		0
Transfers into Level 3		0		0
Transfers out of Level 3		0		(7)
Ending balance		9		9
Securities available-for-sale and other | RMBS | Total fixed maturities, FVO
Assets
Beginning balance	758	1,137	920	1,230
Total realized/unrealized gains (losses), Included in net income	0	0	1	0
Total realized/unrealized gains (losses), Included in OCI	(3)	(3)	(5)	(10)
Purchases	0	0	134	170
Settlements	(51)	(77)	(163)	(251)
Sales	0	(26)	(35)	(27)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(90)	(97)	(238)	(178)
Ending balance	614	934	614	934
Equity Securities, at fair value | Equity Securities, at fair value
Assets
Beginning balance	72		77
Total realized/unrealized gains (losses), Included in net income	(2)		(3)
Total realized/unrealized gains (losses), Included in OCI	0		0
Purchases	0		9
Settlements	0		0
Sales	0		(13)
Transfers into Level 3	0		0
Transfers out of Level 3	0		0
Ending balance	$ 70		$ 70
Equity Securities, at fair value | Securities available-for-sale and other
Assets
Beginning balance		66		76
Total realized/unrealized gains (losses), Included in net income		0		28
Total realized/unrealized gains (losses), Included in OCI		0		1
Purchases		12		13
Settlements		0		0
Sales		0		(40)
Transfers into Level 3		0		0
Transfers out of Level 3		0		0
Ending balance		$ 78		$ 78

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Unrealized Gains (Losses) Included in Net Income for Financial Instruments Classified as Level 3 Still Held at Year End (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	$ (4)	$ (1)	$ (6)	$ (1)
Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(3)	(4)	6	(20)
Significant Unobservable Inputs (Level 3) | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	0	0	0	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	(1)	(1)	(1)
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Liability [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	(2)	0	(8)	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	(1)	0	(1)
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Equity | Liability [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	(2)	0	(8)	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Interest rate derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	0	(1)	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	0	0	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Other Comprehensive Income (Loss) [Member] | Liability [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	0	0	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Other Comprehensive Income (Loss) [Member] | Equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	0	0	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Other Comprehensive Income (Loss) [Member] | Equity | Liability [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	0	0	0
Significant Unobservable Inputs (Level 3) | Freestanding Derivatives, net | Other Comprehensive Income (Loss) [Member] | Interest rate derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Derivatives	0	0	0	0
Significant Unobservable Inputs (Level 3) | Securities available-for-sale and other | Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(2)	0	(2)	0
Significant Unobservable Inputs (Level 3) | Securities available-for-sale and other | Equity Securities [Member] | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0	0	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(2)	0	(3)	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(3)	(4)	6	(20)
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | CLOs | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0	0	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | CLOs | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0	1	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | CMBS | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0	0	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | CMBS | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	1	0	1
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | Corporate | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(2)	0	(3)	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | Corporate | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	(2)	8	(11)
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | Foreign Govt./Govt. Agencies | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0	0	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | Foreign Govt./Govt. Agencies | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0	1	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | RMBS | Securities available-for-sale and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	0	0	0	0
Significant Unobservable Inputs (Level 3) | Total Fixed Maturities, AFS | RMBS | Securities available-for-sale and other | Other Comprehensive Income (Loss) [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Assets	(3)	(3)	(4)	(10)
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	(2)	(1)	(14)	(3)
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Contingent Consideration
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	0	(1)	(6)	(3)
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Liability [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	(2)	(1)	(14)	(3)
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) | Other Comprehensive Income (Loss) [Member] | Contingent Consideration
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Unrealized Gain/(Loss) Included in Net Income, Liabilities	$ 0	$ 0	$ 0	$ 0

Fair Value Measurements - Fai_3

Fair Value Measurements - Fair Value Option (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Fair Value Inputs and Valuation Techniques
Fixed maturities, at fair value using the fair value option	$ 39		$ 39		$ 22
Changes in fair value of assets using fair value option	0	$ 0	0	$ 0
Real Estate Sector [Member]
Fair Value Inputs and Valuation Techniques
Fixed maturities, at fair value using the fair value option	$ 39		$ 39		$ 22

Fair Value Measurements - Finan

Fair Value Measurements - Financial Instruments Not Carried at Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, carrying value	$ 70,256	$ 62,307
Assets, fair value	46,781	41,178
Liabilities, carrying value	54,178	49,206
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	1,726	1,645
Significant Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	42,641	37,071
Carrying Amount | Significant Unobservable Inputs (Level 3) | Other policyholder funds and benefits payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, carrying value	772	774
Carrying Amount | Significant Unobservable Inputs (Level 3) | Mortgage loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, carrying value	3,736	3,704
Carrying Amount | Significant Observable Inputs (Level 2) | Senior notes [1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, carrying value	3,757	3,589
Carrying Amount | Significant Observable Inputs (Level 2) | Junior subordinated debentures [1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, carrying value	1,089	1,089
Fair Value | Significant Unobservable Inputs (Level 3) | Other policyholder funds and benefits payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	774	775
Fair Value | Significant Unobservable Inputs (Level 3) | Mortgage loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	3,900	3,746
Fair Value | Significant Observable Inputs (Level 2) | Senior notes [1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	4,416	3,887
Fair Value | Significant Observable Inputs (Level 2) | Junior subordinated debentures [1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, fair value	$ 1,122	$ 1,052

Investments - Investments - Net

Investments - Investments - Net Realized Capital Gains (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Investments [Line Items]
Gross gains on sales	$ 77	$ 26	$ 190	$ 91
Gross losses on sales	(4)	(41)	(44)	(129)
Net OTTI losses recognized in earnings	(1)	(1)	(3)	(1)
Transactional foreign currency revaluation	0	0	0	1
Total net realized capital gains	89	38	332	60
Equity Securities, FV-NI, Unrealized Gain (Loss)	17	41	100	50
Other net realized capital gains	90	39	335	61
Proceeds from Sale of Available-for-sale Securities	2,600	4,600	11,500	13,100
Net Unrealized Gain on Securities | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Investments [Line Items]
Other net realized capital gains	72	(15)	143	(59)
Other, net
Schedule of Investments [Line Items]
Other, net	(4)	7	5	8
Non-qualifying foreign currency derivatives
Schedule of Investments [Line Items]
Non-qualifying foreign currency derivatives	(5)	9	3	8
Non-qualifying foreign currency derivatives | Other Credit Derivatives
Schedule of Investments [Line Items]
Non-qualifying foreign currency derivatives	(7)	8	1	6
Foreign Exchange Forward [Member] | Non-qualifying foreign currency derivatives
Schedule of Investments [Line Items]
Non-qualifying foreign currency derivatives	2	1	2	2
Equity Securities [Member]
Schedule of Investments [Line Items]
Equity securities	19	46	181	88
Mortgages [Member]
Schedule of Investments [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment	$ 0	$ 0	$ (1)	$ 0

Investments - Investments - Oth

Investments - Investments - Other Than Temporary Impairment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Credit impairments	$ 1	$ 1	$ 3	$ 1
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	1	1	3	1
Other than Temporary Impairment Losses, Investments	1	1	3	1
Cumulative Credit Impairments
Beginning balance	(18)	(20)	(19)	(25)
Additions for credit impairments recognized on:
Securities not previously impaired	(1)	0	(3)	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	0	1	0	1
Reductions for credit impairments previously recognized on:
Securities that matured or were sold during the period	0	1	3	6
Ending balance	$ (19)	$ (20)	$ (19)	$ (20)

Investments - Investments - Ava

Investments - Investments - Available-for-Sale Securities (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	$ 40,174	$ 35,603
Gross Unrealized Gains, fixed maturities, available-for-sale	2,269	703
Gross Unrealized Losses, fixed maturities, available-for-sale	(54)	(654)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	42,389	35,652
Non-Credit OTTI	(4)	(5)
Amortized Cost
One year or less	1,226	999
Over one year through five years	7,144	5,786
Over five years through ten years	7,405	6,611
Over ten years	12,229	12,629
Subtotal	28,004	26,025
Mortgage-backed and asset-backed securities	12,170	9,578
Fair Value
One year or less	1,233	1,002
Over one year through five years	7,333	5,791
Over five years through ten years	7,812	6,495
Over ten years	13,530	12,820
Subtotal	29,908	26,108
Mortgage-backed and asset-backed securities	12,481	9,544
ABS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	1,315	1,272
Gross Unrealized Gains, fixed maturities, available-for-sale	23	5
Gross Unrealized Losses, fixed maturities, available-for-sale	(1)	(1)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	1,337	1,276
Non-Credit OTTI	0	0
CLOs
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	2,162	1,455
Gross Unrealized Gains, fixed maturities, available-for-sale	4	2
Gross Unrealized Losses, fixed maturities, available-for-sale	(8)	(20)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	2,158	1,437
Non-Credit OTTI	0	0
CMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	4,067	3,581
Gross Unrealized Gains, fixed maturities, available-for-sale	193	35
Gross Unrealized Losses, fixed maturities, available-for-sale	(6)	(64)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	4,254	3,552
Non-Credit OTTI	(4)	(5)
Corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	16,867	13,696
Gross Unrealized Gains, fixed maturities, available-for-sale	970	148
Gross Unrealized Losses, fixed maturities, available-for-sale	(36)	(446)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	17,801	13,398
Non-Credit OTTI	0	0
Foreign Govt./Govt. Agencies
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	1,053	866
Gross Unrealized Gains, fixed maturities, available-for-sale	65	7
Gross Unrealized Losses, fixed maturities, available-for-sale	(1)	(26)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	1,117	847
Non-Credit OTTI	0	0
Municipal
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	9,095	9,972
Gross Unrealized Gains, fixed maturities, available-for-sale	801	421
Gross Unrealized Losses, fixed maturities, available-for-sale	(1)	(47)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	9,895	10,346
Non-Credit OTTI	0	0
RMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	4,626	3,270
Gross Unrealized Gains, fixed maturities, available-for-sale	107	44
Gross Unrealized Losses, fixed maturities, available-for-sale	(1)	(35)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	4,732	3,279
Non-Credit OTTI	0	0
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	989	1,491
Gross Unrealized Gains, fixed maturities, available-for-sale	106	41
Gross Unrealized Losses, fixed maturities, available-for-sale	0	(15)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	1,095	1,517
Non-Credit OTTI	$ 0	$ 0

Investments - Investments - Con

Investments - Investments - Concentration of Credit Risk (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Investments, All Other Investments [Abstract]
Fair Value, Concentration of Risk, Investments	$ 0	$ 0

Investments - Investments - Unr

Investments - Investments - Unrealized Losses on AFS Securities (Details) $ in Millions	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	781
Percentage of Gross Unrealized Losses Depressed Less than Twenty Percent of Cost or Amortized Cost	95.00%
ABS
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	$ 144	$ 566
Less Than 12 Months FV	143	566
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	0
12 Months or More Amortized Cost	11	113
12 Months or More FV	11	112
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	1
Total Amortized Cost	155	679
Total FV	154	678
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	1
CLOs
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	1,109	1,358
Less Than 12 Months FV	1,105	1,338
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4	20
12 Months or More Amortized Cost	429	7
12 Months or More FV	425	7
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	4	0
Total Amortized Cost	1,538	1,365
Total FV	1,530	1,345
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	8	20
CMBS
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	88	896
Less Than 12 Months FV	87	882
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	14
12 Months or More Amortized Cost	31	1,129
12 Months or More FV	26	1,079
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	5	50
Total Amortized Cost	119	2,025
Total FV	113	1,961
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	6	64
Corporate
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	930	7,174
Less Than 12 Months FV	918	6,903
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	12	271
12 Months or More Amortized Cost	497	2,541
12 Months or More FV	473	2,366
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	24	175
Total Amortized Cost	1,427	9,715
Total FV	1,391	9,269
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	36	446
Foreign Govt./Govt. Agencies
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	58	407
Less Than 12 Months FV	58	391
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	16
12 Months or More Amortized Cost	39	203
12 Months or More FV	38	193
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1	10
Total Amortized Cost	97	610
Total FV	96	584
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	26
Municipal
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	128	1,643
Less Than 12 Months FV	127	1,613
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	30
12 Months or More Amortized Cost	0	292
12 Months or More FV	0	275
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	17
Total Amortized Cost	128	1,935
Total FV	127	1,888
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	47
RMBS
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	166	1,344
Less Than 12 Months FV	165	1,329
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1	15
12 Months or More Amortized Cost	69	648
12 Months or More FV	69	628
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	20
Total Amortized Cost	235	1,992
Total FV	234	1,957
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1	35
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	37	497
Less Than 12 Months FV	37	492
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	5
12 Months or More Amortized Cost	119	339
12 Months or More FV	119	329
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	10
Total Amortized Cost	156	836
Total FV	156	821
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0	15
Available-for-sale Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Amortized Cost	2,660	13,885
Less Than 12 Months FV	2,640	13,514
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	20	371
12 Months or More Amortized Cost	1,195	5,272
12 Months or More FV	1,161	4,989
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	34	283
Total Amortized Cost	3,855	19,157
Total FV	3,801	18,503
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 54	$ 654

Investments - Investments - Mor

Investments - Investments - Mortgage Loans- Valuation Allowance Activity (Details)	9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 3,736,000,000		$ 3,704,000,000
Number of loans with an allowance	0
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ (1,000,000)	$ (1,000,000)
(Additions)/Reversals	1,000,000	0
Deductions	0	0
Ending balance	$ 0	$ (1,000,000)
Current Weighted Average Loan to Value Ratio of Commercial Mortgage Loan	52.00%
Original Weighted Average Loan to Value Ratio of Commercial Mortgage loan	61.00%
Held-for-sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans with an allowance	0		0
SEC Schedule, 12-09, Allowance, Loan and Lease Loss [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value			$ 23,000,000
Number of loans with an allowance	0
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 3,736,000,000		3,704,000,000
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	(1,000,000)
Ending balance	0
Commercial Loan [Member] | Mortgage loans
Allowance for Loan and Lease Losses [Roll Forward]
Mortgage loans past due by 90 days or more	0
Amortized Cost [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying Value	$ 3,700,000,000		3,700,000,000
Mortgage loans | Commercial Loan [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Mortgage loans past due by 90 days or more			$ 0

Investments - Investments - Com

Investments - Investments - Commercial Mortgage Loans Credit Quality (Details) $ in Millions	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying Value	$ 3,736	$ 3,704
Commercial Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying Value	$ 3,736	$ 3,704
Avg. Debt-Service Coverage Ratio	2.39	2.49
Commercial Loan [Member] | 65% - 80%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying Value	$ 481	$ 386
Avg. Debt-Service Coverage Ratio	1.53	1.60
Commercial Loan [Member] | Less than 65%
Financing Receivable, Credit Quality Indicator [Line Items]
Carrying Value	$ 3,255	$ 3,318
Avg. Debt-Service Coverage Ratio	2.52	2.59

Investments - Investments - M_2

Investments - Investments - Mortgage Loans by Region and Property Type (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,736	$ 3,704
Percent of Total	100.00%	100.00%
Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,156	$ 1,108
Percent of Total	30.90%	29.90%
Multifamily
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 1,156	$ 1,138
Percent of Total	30.90%	30.70%
Office
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 719	$ 708
Percent of Total	19.30%	19.10%
Retail
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 430	$ 392
Percent of Total	11.50%	10.60%
Residential Real Estate [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 135	$ 82
Percent of Total	3.60%	2.20%
Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 140	$ 276
Percent of Total	3.80%	7.50%
East North Central
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 274	$ 250
Middle Atlantic
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	306	270
Mountain
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	63	30
New England
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	345	330
Pacific
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	835	917
South Atlantic
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	743	712
West North Central
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	121	148
West South Central
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	406	420
Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 643	$ 627
Mortgages [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	100.00%	100.00%
Mortgages [Member] | East North Central
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	7.30%	6.80%
Mortgages [Member] | Middle Atlantic
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	8.20%	7.30%
Mortgages [Member] | Mountain
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	1.70%	0.80%
Mortgages [Member] | New England
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	9.20%	8.90%
Mortgages [Member] | Pacific
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	22.40%	24.80%
Mortgages [Member] | South Atlantic
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	19.90%	19.20%
Mortgages [Member] | West North Central
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	3.20%	4.00%
Mortgages [Member] | West South Central
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	10.90%	11.30%
Mortgages [Member] | Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Percent of Total	17.20%	16.90%

Investments - Investments - M_3

Investments - Investments - Mortgage Servicing (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Servicing Asset at Amortized Cost, Fair Value	$ 6,600,000,000	$ 6,000,000,000
Continuing Involvement with Derecognized Transferred Financial Assets, Amount Outstanding	4,100,000,000	3,600,000,000
Servicing Asset at Fair Value, Amount	0	0
Investments [Member]
Continuing Involvement with Continued to be Recognized Transferred Financial Assets, Amount Outstanding	$ 2,500,000,000	$ 2,400,000,000

Investments - Investments - VIE

Investments - Investments - VIEs (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 1,100	$ 1,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Concentration Risk [Line Items]
Variable Interest Entity, Reporting Entity Involvement, Commitments	$ 808	$ 718

Investments - Investments - Sec

Investments - Investments - Securities Lending, Repurchase Agreements, and Other Collateral Transactions (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Securities Lending Transactions:
Gross amount of securities on loan	$ 603	$ 820
Gross amount of associated liability for collateral received	618	840
Repurchase agreements:
Gross amount of recognized liabilities for repurchase agreements	0	72
Gross amount of collateral pledged related to repurchase agreements	0	73
Securities for Reverse Repurchase Agreements	52	64
Securities Loaned, Collateral, Obligation to Return Securities	0	3
Assets Held by Insurance Regulators	2,400	2,200
Short-term investments	2,927	4,283
Debt Securities [Member]
Repurchase agreements:
Debt Securities, Available-for-sale, Restricted	548
Short-term Investments [Member]
Repurchase agreements:
Short-term investments	0
US Treasury Securities [Member]
Repurchase agreements:
Debt Securities, Available-for-sale, Restricted	$ 37	47
Minimum
Repurchase agreements:
Securities Sold Under Agreements to Repurchase, Percentage of Fair Value Required to be Paid in Cash at Sale	95.00%
Fair Value Measured at Net Asset Value Per Share [Member]
Repurchase agreements:
Deposit Assets	$ 55	$ 0

Derivative Instruments - Deriva

Derivative Instruments - Derivatives - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 13,201,000,000		$ 13,201,000,000		$ 12,291,000,000
Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring		$ 0	0	$ 0
Collateral receivable	1,000,000		1,000,000		4,000,000
Pledged collateral, securities	81,000,000		81,000,000		67,000,000
Cash collateral held	17,000,000		17,000,000		9,000,000
Securities Received as Collateral	2,000,000		2,000,000		5,000,000
Collateral Securities Repledged, Delivered, or Used	0		0		0
Fair Value of Securities Received as Collateral that Have Been Resold or Repledged	0		0		0
Over the Counter [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Pledged collateral, securities	83,000,000		83,000,000		89,000,000
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring	0
AOCI Attributable to Parent [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			20,000,000
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	10,919,000,000		10,919,000,000		10,098,000,000
Not Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 7,600,000,000		$ 7,600,000,000		$ 7,100,000,000

Derivative Instruments - Deri_2

Derivative Instruments - Derivatives - Derivative Balance Sheet Classification (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Notional Amount	$ 13,201	$ 12,291
Fair Value	(59)	(61)
Asset Derivatives	35	31
Liability Derivatives	(94)	(92)
Fixed maturities, available-for-sale
Derivatives, Fair Value [Line Items]
Notional Amount	225	153
Fair Value	0	0
Asset Derivatives	0	0
Liability Derivatives	0	0
Other investments
Derivatives, Fair Value [Line Items]
Notional Amount	1,305	9,864
Fair Value	12	7
Asset Derivatives	15	23
Liability Derivatives	(3)	(16)
Other liabilities
Derivatives, Fair Value [Line Items]
Notional Amount	11,671	2,274
Fair Value	(71)	(68)
Asset Derivatives	20	8
Liability Derivatives	(91)	(76)
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	10,919	10,098
Fair Value	(66)	(56)
Asset Derivatives	26	27
Liability Derivatives	(92)	(83)
Interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	2,040	2,040
Fair Value	0	1
Asset Derivatives	0	2
Liability Derivatives	0	(1)
Interest rate swaps | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	7,600	7,100
Foreign currency swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	242	153
Fair Value	7	(6)
Asset Derivatives	9	2
Liability Derivatives	(2)	(8)
Total cash flow hedges
Derivatives, Fair Value [Line Items]
Notional Amount	2,282	2,193
Fair Value	7	(5)
Asset Derivatives	9	4
Liability Derivatives	(2)	(9)
Interest rate swaps and futures | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	8,844	8,451
Fair Value	(70)	(62)
Asset Derivatives	2	8
Liability Derivatives	(72)	(70)
Foreign currency swaps and forwards | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	454	287
Fair Value	1	(1)
Asset Derivatives	1	0
Liability Derivatives	0	(1)
Credit derivatives that purchase credit protection | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	353	6
Fair Value	(2)	0
Asset Derivatives	0	0
Liability Derivatives	(2)	0
Credit derivatives that assume credit risk | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	521	1,102
Fair Value	10	3
Asset Derivatives	10	8
Liability Derivatives	0	(5)
Credit derivatives in offsetting positions | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	32	41
Fair Value	0	0
Asset Derivatives	5	6
Liability Derivatives	(5)	(6)
Equity index swaps and options | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount	715	211
Fair Value	(5)	4
Asset Derivatives	8	5
Liability Derivatives	$ (13)	$ (1)

Derivative Instruments - Deri_3

Derivative Instruments - Derivatives - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Asset Derivatives	$ 35	$ 31
Derivative assets	12	7
Accrued Interest and Cash Collateral (Received)	(1)	(4)
Gross Amounts of Recognized (Liabilities)	(94)	(92)
Derivative Liability	(71)	(68)
Other liabilities
Derivative [Line Items]
Accrued Interest and Cash Collateral (Received)	11	4
Gross Amounts of Recognized (Liabilities)	(94)	(92)
Gross Amounts Offset in the Statement of Financial Position, liabilities	(12)	(20)
Derivative Liability	(71)	(68)
Financial Collateral (Received)	(73)	(65)
Net amount, liabilities	(9)	(7)
Other investments
Derivative [Line Items]
Asset Derivatives	35	31
Gross Amounts Offset in the Statement of Financial Position, assets	32	26
Derivative assets	12	7
Accrued Interest and Cash Collateral (Received)	9	2
Financial Collateral Pledged	1	2
Net Amount, assets	$ 2	$ 3

Derivative Instruments - Deri_4

Derivative Instruments - Derivatives - Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net realized capital gains (losses)	$ 89	$ 38	$ 332	$ 60
Net Investment Income	490	444	1,448	1,323
Interest Expense	67	69	194	228
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net Investment Income	1	7	1	24
Interest Expense	0		1
Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net Investment Income	1		2
Cash Flow Hedging | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	10	0	34	(15)
Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Net realized capital gains
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0	0	2	1
Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Net investment income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	2	7	3	24
Cash Flow Hedging | Designated as Hedging Instrument | Reclassification out of Accumulated Other Comprehensive Income | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0	0	1	0
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	0	0	20	(16)
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Net realized capital gains
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0	0	2	1
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Net investment income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	1	7	1	24
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0	0	1	0
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	10	0	14	1
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Net realized capital gains
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0	0	0	0
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Net investment income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	1	0	2	0
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Interest Expense [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	$ 0	$ 0	$ 0	$ 0

Derivative Instruments - Deri_5

Derivative Instruments - Derivatives - Non-qualifying Strategies (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Non-qualifying foreign currency derivatives	$ (5)	$ 9	$ 3	$ 8
Total other non-qualifying derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Non-qualifying foreign currency derivatives	(7)	8	1	6
Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Non-qualifying foreign currency derivatives	2	1	2	2
Interest rate swaps, swaptions, and futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Non-qualifying foreign currency derivatives	(5)	1	(20)	7
Credit derivatives that assume credit risk | Credit derivatives that purchase credit protection
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Non-qualifying foreign currency derivatives	(1)	0	(1)	0
Credit derivatives that assume credit risk | Credit derivatives that assume credit risk
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Non-qualifying foreign currency derivatives	0	8	27	0
Equity options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Non-qualifying foreign currency derivatives	$ (1)	$ (1)	$ (5)	$ (1)

Derivative Instruments - Deri_6

Derivative Instruments - Derivatives - Credit Risk Assumed through Credit Derivatives (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Credit Derivatives [Line Items]
Notional Amount	$ 13,201	$ 12,291
Fair Value	(59)	(61)
Credit Default Swap, Selling Protection [Member]
Credit Derivatives [Line Items]
Notional Amount	537	1,123
Credit derivatives
Credit Derivatives [Line Items]
Fair Value	5	(3)
Offsetting Notional Amount	16	21
Offsetting Fair Value	5	6
Credit derivatives | Single name credit default swaps | A Minus | Investment grade risk exposure
Credit Derivatives [Line Items]
Notional Amount	121
Fair Value	$ 2
Weighted Average Years to Maturity	5 years
Offsetting Notional Amount	$ 0
Offsetting Fair Value	0
Credit derivatives | Single name credit default swaps | A | Investment grade risk exposure
Credit Derivatives [Line Items]
Notional Amount		169
Fair Value		$ 2
Weighted Average Years to Maturity		4 years
Offsetting Notional Amount		$ 0
Offsetting Fair Value		0
Credit derivatives | Basket credit default swaps | A Minus | Investment grade risk exposure
Credit Derivatives [Line Items]
Notional Amount		11
Fair Value		$ 0
Weighted Average Years to Maturity		5 years
Offsetting Notional Amount		$ 2
Offsetting Fair Value		0
Credit derivatives | Basket credit default swaps | BBB Plus | Investment grade risk exposure
Credit Derivatives [Line Items]
Notional Amount	400	799
Fair Value	$ 8	$ (1)
Weighted Average Years to Maturity	5 years	6 years
Offsetting Notional Amount	$ 0	$ 0
Offsetting Fair Value	0	0
Credit derivatives | Basket credit default swaps | B Plus | Below investment grade risk exposure
Credit Derivatives [Line Items]
Notional Amount		125
Fair Value		$ 2
Weighted Average Years to Maturity		5 years
Offsetting Notional Amount		$ 0
Offsetting Fair Value		0
Credit derivatives | Basket credit default swaps | A | Investment grade risk exposure
Credit Derivatives [Line Items]
Notional Amount	1
Fair Value	$ 0
Average Term of Credit Risk Derivatives Less than 1 Year	Less than 1 year
Offsetting Notional Amount	$ 1
Offsetting Fair Value	0
Credit derivatives | Basket credit default swaps | CCC | Below investment grade risk exposure
Credit Derivatives [Line Items]
Notional Amount	15	19
Fair Value	$ (5)	$ (6)
Average Term of Credit Risk Derivatives Less than 1 Year	Less than 1 year	Less than 1 year
Offsetting Notional Amount	$ 15	$ 19
Offsetting Fair Value	$ 5	$ 6

Reserve for Unpaid Losses and_3

Reserve for Unpaid Losses and Loss Adjustment Expenses - P&C Liabilities for Unpaid Losses and Loss Adjustment Expense (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	May 23, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	$ 33,029
Less: payments
Foreign currency adjustment	(12)	$ 0
Ending liabilities for unpaid losses and loss adjustment expenses, gross	36,188
Property, Liability and Casualty Insurance Product Line
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	24,584	23,775
Reinsurance and other recoverables			$ 5,083		$ 4,232	$ 3,780	$ 3,957
Beginning liabilities for unpaid losses and loss adjustment expenses, net	22,814	20,017	$ 22,814		20,352	$ 20,017	$ 19,818
Provision for unpaid losses and loss adjustment expense
Current accident year	5,448	5,151
Prior accident year development	(23)	(139)
Total provision for unpaid losses and loss adjustment expenses	5,425	5,012
Less: payments
Current accident year	(1,549)	(1,647)
Prior accident years	(3,403)	(3,166)
Total payments	(4,952)	(4,813)
Ending liabilities for unpaid losses and loss adjustment expenses, net	22,814	20,017
Ending liabilities for unpaid losses and loss adjustment expenses, gross	$ 27,897	$ 23,797
Property, Liability and Casualty Insurance Product Line | The Navigators Group, Inc. [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Navigators Group acquisition				$ 2,001	$ 0

Reserve for Unpaid Losses and_4

Reserve for Unpaid Losses and Loss Adjustment Expenses - P&C Prior Accident Years Reserve Development (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Property, Liability and Casualty Insurance Product Line
Product Information [Line Items]
Reinsurance and other recoverables	$ 5,083	$ 5,083	$ 3,780	$ 4,232	$ 3,957
Prior accident year development		(23)	(139)
Liability for Unpaid Claims and Claims Adjustment Expense, Net	$ 22,814	22,814	20,017	$ 20,352	$ 19,818
Property, Liability and Casualty Insurance Product Line | Scenario, Adjustment [Member]
Product Information [Line Items]
Reinsurance and other recoverables			90
Property, Liability and Casualty Insurance Product Line | Workers’ compensation
Product Information [Line Items]
Prior accident year development		(90)	(97)
Property, Liability and Casualty Insurance Product Line | Workers’ compensation discount accretion
Product Information [Line Items]
Prior accident year development		25	30
Property, Liability and Casualty Insurance Product Line | General liability
Product Information [Line Items]
Prior accident year development		62	32
Property, Liability and Casualty Insurance Product Line | Marine
Product Information [Line Items]
Prior accident year development		8	0
Property, Liability and Casualty Insurance Product Line | Package business
Product Information [Line Items]
Prior accident year development		(32)	(16)
Property, Liability and Casualty Insurance Product Line | Professional liability
Product Information [Line Items]
Prior accident year development		32	(12)
Property, Liability and Casualty Insurance Product Line | Bond
Product Information [Line Items]
Prior accident year development		(2)	0
Property, Liability and Casualty Insurance Product Line | Assumed Reinsurance
Product Information [Line Items]
Prior accident year development		3	0
Property, Liability and Casualty Insurance Product Line | Net asbestos reserves
Product Information [Line Items]
Prior accident year development		0	0
Property, Liability and Casualty Insurance Product Line | Net environmental reserves
Product Information [Line Items]
Prior accident year development		0	0
Property, Liability and Casualty Insurance Product Line | Catastrophes
Product Information [Line Items]
Prior accident year development		(27)	(47)
Property, Liability and Casualty Insurance Product Line | Catastrophes | Scenario, Adjustment [Member]
Product Information [Line Items]
Prior accident year development			133
Liability for Unpaid Claims and Claims Adjustment Expense, Net			850
Property, Liability and Casualty Insurance Product Line | Uncollectible reinsurance
Product Information [Line Items]
Prior accident year development		0	22
Property, Liability and Casualty Insurance Product Line | Other reserve re-estimates, net
Product Information [Line Items]
Prior accident year development		15	4
Property and Casualty, Commercial Insurance [Member] | Property
Product Information [Line Items]
Prior accident year development		(16)	(10)
Property and Casualty, Commercial Insurance [Member] | Automobile
Product Information [Line Items]
Prior accident year development		27	(15)
Property and Casualty, Personal Insurance [Member] | Property
Product Information [Line Items]
Prior accident year development		0	(20)
Property and Casualty, Personal Insurance [Member] | Automobile
Product Information [Line Items]
Prior accident year development		(28)	$ (10)
PG&E [Member]
Gain Contingencies [Line Items]
Percentage of Insurance Subrogation Claims Covered in Settlement	85.00%
Reinsurance Recoverable, Guarantee Benefit	$ 116	116
PG&E [Member] | Expected Settlement for All Consenting Creditors [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	11,000	11,000
PG&E [Member] | Portion of Expected Class Settlement Due to HIG [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	325	325
PG&E [Member] | Portion of Expected Class Settlement Due to Reinsurer [Member]
Gain Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	$ 116	$ 116

Reserve for Unpaid Losses and_5

Reserve for Unpaid Losses and Loss Adjustment Expenses - GB Liabilities for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	$ 33,029
Less: payments
Ending liabilities for unpaid losses and loss adjustment expenses, gross	36,188
Group Insurance Policy [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning liabilities for unpaid losses and loss adjustment expenses, gross	8,445	$ 8,512
Reinsurance and other recoverables	231	241	$ 239	$ 209
Beginning liabilities for unpaid losses and loss adjustment expenses, net	8,206	8,303
Provision for unpaid losses and loss adjustment expense
Current incurral year	3,351	3,423
Prior year's discount accretion	169	175
Prior incurral year development	(321)	(284)
Total provision for unpaid losses and loss adjustment expenses	3,199	3,314
Less: payments
Current incurral year	(1,603)	(1,659)
Prior incurral years	(1,743)	(1,741)
Total payments	(3,346)	(3,400)
Ending liabilities for unpaid losses and loss adjustment expenses, net	8,059	8,259
Ending liabilities for unpaid losses and loss adjustment expenses, gross	8,290	8,500
Group Insurance Policy [Member] | Other Operating Income (Expense) [Member]
Provision for unpaid losses and loss adjustment expense
Total provision for unpaid losses and loss adjustment expenses	130	131
Aetna Group Insurance [Member] | Group Insurance Policy [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Business Acquisitions	$ 0	$ 42

Reserve for Unpaid Losses and_6

Reserve for Unpaid Losses and Loss Adjustment Expenses - GB Additional information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Liability for Claims and Claims Adjustment Expense [Line Items]
Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss)	$ (12)	$ 0
Group Insurance Policy [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior incurral year development	(321)	(284)
Group Insurance Policy [Member] | Long-term Disability [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior incurral year development	265	195
Group Insurance Policy [Member] | group life term, disability and accident [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior incurral year development	$ 45	$ 85

Reserves for Future Policy Be_2

Reserves for Future Policy Benefits (Details) - Annuitization Benefit - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Beginning Balance	$ 642	$ 713
Incurred	63	10
Paid	77	25
Change in unrealized investment gains and losses	17	(42)
Ending Balance	645	656
Movement in Liabilities for Guarantees on Long-Duration Contracts, Reinsurance Recoverable [Roll Forward]
Beginning Balance	27	26
Incurred	2	10
Paid	0	1
Ending Balance	$ 29	$ 35

Debt - Debt (Details)

Debt - Debt (Details) £ in Millions, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 17, 2019	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019AUD ($)	Sep. 30, 2019GBP (£)	Aug. 19, 2019USD ($)	May 23, 2019USD ($)	Jan. 15, 2019USD ($)
Debt Instruments [Line Items]
Registration Payment Arrangement, Term	three
Proceeds from Debt, Net of Issuance Costs				$ 1,380,000,000
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed				100.00%
Loss on extinguishment of debt		$ 90,000,000	$ 0	$ 90,000,000	$ 6,000,000
Club Facility [Member]
Debt Instruments [Line Items]
Letters of Credit Outstanding, Amount		165,000,000		165,000,000			£ 60
Bilateral Facility [Member]
Debt Instruments [Line Items]
Letters of Credit Outstanding, Amount		8,000,000		8,000,000
Debt Instrument, Unused Borrowing Capacity, Amount		17,000,000		$ 17,000,000
Australian Dollar Facility [Member] [Member]
Debt Instruments [Line Items]
Letters of Credit Outstanding, Amount						$ 24
Debt Instrument, Unused Borrowing Capacity, Amount						$ 26
Senior Note Two Point Eight due in Two Thousand Twenty Nine [Member]
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Increase (Decrease)				2000.00%
Senior Note Three Point Six due in Two Thousand Forty Nine [Member]
Debt Instruments [Line Items]
Debt Instrument, Interest Rate, Increase (Decrease)				2500.00%
Senior Notes | Senior Note Six Point Zero Percent Due in Two Thousand Nineteen [Member]
Debt Instruments [Line Items]
Repayment of debt										$ 413,000,000
Interest rate										6.00%
Senior Notes | Senior Note Five Point Seven Five Percent Due in Two Thousand Twenty Three [Member]
Debt Instruments [Line Items]
Interest rate									5.75%
Senior Notes									$ 265,000,000
Debt Instrument, Fair Value Disclosure									$ 284,000,000
Senior Notes | Senior Note Two Point Eight due in Two Thousand Twenty Nine [Member]
Debt Instruments [Line Items]
Interest rate								2.80%
Senior Notes								$ 600,000,000
Senior Notes | Senior Note Three Point Six due in Two Thousand Forty Nine [Member]
Debt Instruments [Line Items]
Interest rate								3.60%
Senior Notes								$ 800,000,000
Senior Notes | Senior Note Five Point Seven Five due in Two Thousand Twenty Three [Member]
Debt Instruments [Line Items]
Repayment of debt		$ 265		$ 265
Interest rate		5.75%		5.75%		5.75%	5.75%
Senior Notes | Senior Note Five Point One Twenty Five due in Two Thousand Twenty Two [Member]
Debt Instruments [Line Items]
Repayment of debt		$ 800		$ 800
Interest rate		5.125%		5.125%		5.125%	5.125%

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Tax provision at U.S. federal statutory rate	$ 138	$ 112	$ 396	$ 333
Tax-exempt interest	(14)	(16)	(43)	(50)
Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount	(3)	0	(5)	0
Executive compensation	0	1	5	8
Stock-based compensation	3	3	7	5
Tax Reform	0	11	0	13
Other	0	2	(1)	2
Provision for income taxes	$ 118	$ 103	$ 347	$ 297

Income Taxes - Unrecognized tax

Income Taxes - Unrecognized tax benefit (expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of period	$ 14	$ 9	$ 14	$ 9
Gross increases - tax positions in prior period	0	5	0	5
Gross decreases - tax positions in prior period	0	0	0	0
Balance, end of period	$ 14	$ 14	$ 14	$ 14

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Other	$ 413		$ 413
Deferred Tax Assets, Tax Credit Carryforwards	2		8
Income Tax Examination, Penalties and Interest Expense	1	$ 0	1	$ 0
Income Tax Examination, Interest Accrued	0	$ 0	0	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0		0
Income Tax Examination, Penalties Accrued	$ 0		0
UNITED STATES
Operating Loss Carryforwards [Line Items]
Deferred Other Tax Expense (Benefit)			225
UNITED KINGDOM
Operating Loss Carryforwards [Line Items]
Deferred Other Tax Expense (Benefit)			1
Alternative Minimum Tax (AMT) [Member]
Operating Loss Carryforwards [Line Items]
Proceeds from Income Tax Refunds			$ 421

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2016
Asbestos
Loss Contingencies [Line Items]
Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts	$ 910
Environmental
Loss Contingencies [Line Items]
Liability for unpaid losses and loss adjustment expenses, at undiscounted amounts	133
Asbestos and Environmental
Loss Contingencies [Line Items]
Reinsurance premium		$ 650
Maximum adverse loss development to be ceded under agreement	977
Reinsurance Retention Policy, Amount Retained		$ 1,700
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	523
Asbestos and Environmental | Maximum
Loss Contingencies [Line Items]
Maximum adverse loss development to be ceded under agreement	$ 1,500

Commitments and Contingencies_2

Commitments and Contingencies - Derivative Instruments (Details) $ in Millions	Sep. 30, 2019USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, Net Liability Position, Aggregate Fair Value	$ 81
Collateral Already Posted, Aggregate Fair Value	80
Additional Collateral, Aggregate Fair Value	$ 8

Equity - Capital Purchase Progr

Equity - Capital Purchase Program Warrants (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended	9 Months Ended
	Oct. 30, 2019	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Class of Warrant or Right [Line Items]
Warrants outstanding								1.9
Treasury Stock, Shares, Acquired		1.1	0.5		1.6
Treasury Stock, Value, Acquired, Cost Method		$ 63	$ 27		$ 90
Subsequent Event [Member]
Class of Warrant or Right [Line Items]
Treasury Stock, Shares, Acquired	0.6
Treasury Stock, Value, Acquired, Cost Method	$ 36
Warrant [Member]
Class of Warrant or Right [Line Items]
Warrants Exercised				0.1		1.9	0.2

Equity ~Treasury Stock, Value (

Equity ~Treasury Stock, Value (Details) - USD ($) $ / shares in Thousands, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2019
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		$ 1,000	$ 1,000
Treasury Stock, Shares, Acquired	1.1	0.5	1.6
Treasury Stock, Value, Acquired, Cost Method	$ 63	$ 27	$ 90
Treasury Stock Acquired, Average Cost Per Share	$ 58,500	$ 53,840
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 910	$ 973	$ 973

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income Loss - AOCI Rollforward (Details) - USD ($) $ in Millions	Jan. 01, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				$ 13,101
OCI, net of tax		$ 412	$ (166)	1,793	$ (2,177)
Ending balance		16,078	12,729	16,078	12,729
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	$ (88)
Equity securities and shadow DAC [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes, net of tax [1]	93
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,931	1,367	211	24	1,931
Cumulative effect of accounting changes, net of tax [1]									$ 273
Adjusted balance, beginning of period									2,204
OCI before reclassifications		458	(183)	1,857	(2,213)
Amounts reclassified from AOCI		(57)	12	(113)	49
OCI, net of tax		401	(171)	1,744	(2,164)
Ending balance		1,768	40	1,768	40
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(3)	(3)	(3)	(4)	(3)
Cumulative effect of accounting changes, net of tax [1]									0
Adjusted balance, beginning of period									(3)
OCI before reclassifications		0	(1)	1	0
Amounts reclassified from AOCI		0	0	0	(1)
OCI, net of tax		0	(1)	1	(1)
Ending balance		(3)	(4)	(3)	(4)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	18	11	(12)	(5)	18
Cumulative effect of accounting changes, net of tax [1]									2
Adjusted balance, beginning of period									20
OCI before reclassifications		8	1	27	(12)
Amounts reclassified from AOCI		(2)	(6)	(5)	(25)
OCI, net of tax		6	(5)	22	(37)
Ending balance		17	(17)	17	(17)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	34	34	33	30	34
Cumulative effect of accounting changes, net of tax [1]									4
Adjusted balance, beginning of period									38
OCI before reclassifications		(4)	1	0	(4)
Amounts reclassified from AOCI		0	0	0	0
OCI, net of tax		(4)	1	0	(4)
Ending balance		30	34	30	34
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,317)	(1,607)	(1,582)	(1,624)	(1,317)
Cumulative effect of accounting changes, net of tax [1]									(284)
Adjusted balance, beginning of period									(1,601)
OCI before reclassifications		1	1	1	0
Amounts reclassified from AOCI		8	9	25	29
OCI, net of tax		9	10	26	29
Ending balance		(1,598)	(1,572)	(1,598)	(1,572)
AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 663	(198)	(1,353)	(1,579)	663
Cumulative effect of accounting changes, net of tax [1]						$ 0	$ 0	$ 0	(5)
Adjusted balance, beginning of period						$ (198)	$ (1,579)	$ (1,353)	$ 658
OCI before reclassifications		463	(181)	1,886	(2,229)
Amounts reclassified from AOCI		(51)	15	(93)	52
OCI, net of tax		412	(166)	1,793	(2,177)
Ending balance		$ 214	(1,519)	$ 214	(1,519)
Discontinued Operations, Disposed of by Sale [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Disposal Group, Including Discontinued Operations, Adjustments to AOCI			$ 758		$ 758

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income Loss - Reclassifications from AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized capital gains	$ 90	$ 39	$ 335	$ 61
Income from continuing operations, before tax	653	530	1,884	1,586
Income tax expense	118	103	347	297
Income from discontinued operations, net of tax	0	5	0	322
Net Investment Income	490	444	1,448	1,323
Interest Expense	67	69	194	228
Insurance operating costs and other expenses	1,167	1,091	3,356	3,195
Net income	535	432	1,537	1,611
Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	51	(15)	93	(52)
Net Unrealized Gain on Securities | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized capital gains	72	(15)	143	(59)
Income from continuing operations, before tax	72	(15)	143	(59)
Income tax expense	15	(3)	30	(12)
Income from discontinued operations, net of tax		0		(2)
Net income	57	(12)	113	(49)
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized capital gains		0		0
Income from continuing operations, before tax		0		0
Income tax expense		0		0
Income from discontinued operations, net of tax		0		1
Net income		0		1
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income from continuing operations, before tax	2	7	6	25
Income tax expense	0	1	1	5
Income from discontinued operations, net of tax		0		5
Net income	2	6	5	25
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Reclassification out of Accumulated Other Comprehensive Income | Currency Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net Investment Income	1		2
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent | Reclassification out of Accumulated Other Comprehensive Income | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net realized capital gains	0	0	2	1
Net Investment Income	1	7	1	24
Interest Expense	0		1
Amortization of prior service credit | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Insurance operating costs and other expenses	2	2	5	5
Amortization of actuarial loss | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Insurance operating costs and other expenses	(12)	(14)	(37)	(42)
Pension and Other Postretirement Plan Adjustments | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income from continuing operations, before tax	(10)	(12)	(32)	(37)
Income tax expense	(2)	(3)	(7)	(8)
Net income	$ (8)	$ (9)	$ (25)	$ (29)

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Benefit) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Component of periodic benefit cost
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 70
Pension Plan [Member]
Component of periodic benefit cost
Service cost	1,000,000	$ 1,000,000	$ 3,000,000	$ 3,000,000
Interest cost	(40,000,000)	(36,000,000)	(119,000,000)	(107,000,000)
Expected return on plan assets	(57,000,000)	(57,000,000)	(170,000,000)	(172,000,000)
Amortization of prior service credit	0	0	0	0
Amortization of actuarial loss	(11,000,000)	(12,000,000)	(33,000,000)	(37,000,000)
Net periodic cost (benefit)	(5,000,000)	(8,000,000)	(15,000,000)	(25,000,000)
Other Postretirement Benefits Plan [Member]
Component of periodic benefit cost
Service cost	0	0	0	0
Interest cost	(2,000,000)	(1,000,000)	(6,000,000)	(4,000,000)
Expected return on plan assets	(1,000,000)	(2,000,000)	(3,000,000)	(5,000,000)
Amortization of prior service credit	(2,000,000)	(2,000,000)	(5,000,000)	(5,000,000)
Amortization of actuarial loss	(1,000,000)	(2,000,000)	(4,000,000)	(5,000,000)
Net periodic cost (benefit)	$ 0	$ (1,000,000)	$ 2,000,000	$ (1,000,000)

Business Disposition and Disc_2

Business Disposition and Discontinued Operations - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	May 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Ongoing Equity Method Investment in Discontinued Operation after Disposal	$ 14	$ 45
Discontinued Operation, Amount of Continuing Cash Flows after Disposal		$ 67
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest retained, percentage			9.70%

Business Disposition and Disc_3

Business Disposition and Discontinued Operations - Reconciliation of the Major Line Items Constituting Pretax Profit (Loss) of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Benefits, losses and expenses
Income from discontinued operations, net of tax	$ 0	$ 5	$ 0	$ 322
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Revenues
Earned premiums		0		39
Fee income and other		0		382
Net investment income		0		519
Net realized capital gains (losses)		4		(68)
Total revenues		4		872
Benefits, losses and expenses
Benefits, losses and loss adjustment expenses		0		535
Amortization of DAC		0		58
Insurance operating costs and other expenses [1]		(5)		157
Total benefits, losses and expenses		(5)		750
Income before income taxes		9		122
Income tax expense (benefit)		(7)		2
Income from operations of discontinued operations, net of tax		16		120
Net realized capital gain (loss) on disposal, net of tax		(11)		202
Income from discontinued operations, net of tax		$ 5		$ 322

Business Disposition and Disc_4

Business Disposition and Discontinued Operations - Cash Flows from Discontinued Operations (Details) - Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash provided by operating activities from discontinued operations	$ 603
Net cash provided by investing activities from discontinued operations	463
Net cash used in financing activities from discontinued operations [1]	(737)
Cash paid for interest	0
Payments of Capital Distribution	$ 619

Leases Additional Information (

Leases Additional Information (Details) - USD ($)	Sep. 30, 2019	Jul. 01, 2019	Jan. 01, 2019
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 200,000,000	$ 34,000,000	$ 150,000,000
Operating Lease, Liability	$ 209,000,000

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 13	$ 36
Short-term lease cost	0	1
Variable lease cost	0	1
Sublease income	(1)	(4)
Total lease costs included in insurance operating costs and other expenses	$ 12	$ 34

Leases Supplemental Operating L

Leases Supplemental Operating Lease Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Leases [Abstract]
Operating cash flows for operating leases (for the nine months ended)	$ 36
Weighted-average remaining lease term in years for operating leases	6 years
Weighted-average discount rate for operating leases	3.60%

Leases Future Minimum Lease Pay

Leases Future Minimum Lease Payments (Details)	Sep. 30, 2019USD ($)
Leases [Abstract]
2019	$ 13,000,000
2020	51,000,000
2021	39,000,000
2022	33,000,000
2023	30,000,000
Thereafter	66,000,000
Total lease payments	232,000,000
Less: Discount on lease payments to present value	23,000,000
Total lease liability	$ 209,000,000

Uncategorized Items - hig930201

Label	Element	Value
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 121,000,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 180,000,000