Reinsurance Group of America (RGA) 10-K 26 Feb 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information Document Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Jan. 31, 2021	Jun. 30, 2020
Document And Entitiy Information [Abstract]
Entity Incorporation, State or Country Code	MO
Document type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Amendment flag	false
Entity registrant name	REINSURANCE GROUP OF AMERICA, INCORPORATED
Entity central index key	0000898174
Entity current reporting status	Yes
Entity Interactive Data Current	Yes
Entity voluntary filers	No
Current fiscal year end date	--12-31
Entity filer category	Large Accelerated Filer
Entity well known seasoned issuer	Yes
Entity public float			$ 5,300
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Transition Report	false
Entity File Number	1-11848
Entity Tax Identification Number	43-1627032
ICFR Auditor Attestation Flag	true
Common Shares Outstanding		67,972,976

Document and Entity Address

Document and Entity Address - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Jan. 31, 2021	Jun. 30, 2020
Entity Addresses [Line Items]
Entity Address, Address Line One	16600 Swingley Ridge Road
Entity Address, City or Town	Chesterfield
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63017
City Area Code	636
Local Phone Number	736-7000
Entity public float			$ 5,300
Common Shares Outstanding		67,972,976

Document and Entity Informati_2

Document and Entity Information Document and Entity Information Entity Listing - NEW YORK STOCK EXCHANGE, INC. [Member]	12 Months Ended
	Dec. 31, 2020
RGA [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01
Trading Symbol	RGA
Security Exchange Name	NYSE
RZA [Member]
Entity Information [Line Items]
Title of 12(b) Security	6.20% Fixed-To-Floating Rate Subordinated Debentures due 2042
Trading Symbol	RZA
Security Exchange Name	NYSE
RZB [Member]
Entity Information [Line Items]
Title of 12(b) Security	5.75% Fixed-To-Floating Rate Subordinated Debentures due 2056
Trading Symbol	RZB
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fixed Maturity Securities [Abstract]
Available-for-sale at fair value (amortized cost of $49,548 and $46,753; allowance for credit losses of $20 at December 31, 2020)	$ 56,735	$ 51,121
Equity Securities, FV-NI	132	320
Mortgage loans on real estate (net of allowances of $64 and $12)	5,787	5,706
Policy loans	1,258	1,319
Funds withheld at interest	5,432	5,662
Short-term investments	227	64
Other invested assets	2,829	2,363
Total investments	72,400	66,555
Cash and cash equivalents	3,408	1,449
Accrued investment income	511	493
Premiums receivable and other reinsurance balances	2,842	2,940
Reinsurance ceded receivables	983	904
Deferred policy acquisition costs	3,616	3,512
Other assets	896	878
Total assets	84,656	76,731
Liabilities and Stockholders’ Equity
Future policy benefits	31,453	28,672
Interest-sensitive contract liabilities	23,276	22,711
Other policy claims and benefits	6,413	5,711
Other reinsurance balances	598	557
Deferred income taxes	3,263	2,712
Other liabilities	1,340	1,188
Long-term debt	3,573	2,981
Collateral finance and securitization notes	388	598
Total liabilities	70,304	65,130
Commitments and contingent liabilities (See Note 12)
Stockholders Equity:
Preferred stock (par value $.01 per share; 10,000,000 shares authorized; no shares issued or outstanding)	0	0
Common stock (par value $0.01 per share; 140,000,000 shares authorized; shares issued: 85,310,598 at December 31, 2020 and 79,137,758 at December 31, 2019)	1	1
Additional paid-in-capital	2,406	1,937
Retained earnings	8,148	7,952
Treasury stock, at cost – 17,353,697 and 16,481,656 shares	(1,562)	(1,426)
Accumulated other comprehensive income	5,359	3,137
Total stockholders’ equity	14,352	11,601
Total liabilities and stockholders’ equity	$ 84,656	$ 76,731

CONSOLIDATED BALANCE SHEETS PAR

CONSOLIDATED BALANCE SHEETS PARENTHETICAL - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Available for Sale at Fair value - Amortized cost	$ 49,548	$ 46,753
Preferred stock par value	$ 0.01
Preferred stock shares authorized	10,000,000
Common stock par value	$ 0.01
Common stock shares authorized	140,000,000
Common Stock, Shares, Issued	85,310,598	79,137,758
Treasury Shares Held	17,353,697	16,481,656
Allowances for Loan and Lease Losses, Real Estate	$ 64	$ 12
Financing Receivable, Allowance for Credit Loss	$ 20

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues
Net premiums	$ 11,694	$ 11,297	$ 10,544
Investment income, net of related expenses	2,575	2,520	2,139
Investment related gains (losses), net:
Impairments and change in allowance for credit losses on fixed maturity securities	(21)	(31)	(28)
Other investment related gains (losses), net	(12)	122	(142)
Total investment related gains (losses), net	(33)	91	(170)
Other revenues	360	392	363
Total revenues	14,596	14,300	12,876
Benefits and expenses
Claims and other policy benefits	11,075	10,197	9,319
Interest credited	704	697	425
Policy acquisition costs and other insurance expenses	1,261	1,204	1,323
Other operating expenses	816	868	786
Interest expense	170	173	147
Collateral finance and securitization expense	17	29	30
Total benefits and expenses	14,043	13,168	12,030
Income before income taxes	553	1,132	846
Provision for income taxes	138	262	130
Net income	$ 415	$ 870	$ 716
Earnings per share
Basic earnings per share (in dollars per share)	$ 6.35	$ 13.88	$ 11.25
Diluted earnings per share (in dollars per share)	$ 6.31	$ 13.62	$ 11

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Comprehensive income
Net Income (Loss) Attributable to Parent	$ 415	$ 870	$ 716
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	23	77	(80)
Net unrealized investment gains (losses)	2,201	2,443	(1,344)
Defined benefit pension and postretirement plan adjustments	(2)	(19)	0
Total other comprehensive income (loss), net of tax	2,222	2,501	(1,424)
Total comprehensive income (loss)	$ 2,637	$ 3,371	$ (708)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Treasury Stock Member	Accumulated Other Comprehensive Income Member
Total stockholders equity at Dec. 31, 2017	$ 9,570	$ 1	$ 1,871	$ 6,736	$ (1,102)	$ 2,064
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	716			716
Stockholders' Equity, Other | Accounting Standards Update 2018-02 [Member]	(3)			1		(4)
Other Comprehensive Income (Loss), Net of Tax	(1,424)					(1,424)
Dividends to stockholders, $2.80 per share	(140)			(140)
Treasury Stock, Value, Acquired, Cost Method	300				(300)
Reissuance of treasury stock	(31)		(28)	(28)	(31)
Proceeds from Issuance of Common Stock	0
Total stockholders equity at Dec. 31, 2018	8,450	1	1,899	7,285	(1,371)	636
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	870			870
Stockholders' Equity, Other | Accounting Standards Update 2018-02 [Member]	0			0
Other Comprehensive Income (Loss), Net of Tax	2,501					2,501
Dividends to stockholders, $2.80 per share	(163)			(163)
Treasury Stock, Value, Acquired, Cost Method	101				(101)
Reissuance of treasury stock	(44)		(38)	(40)	(46)
Proceeds from Issuance of Common Stock	0
Total stockholders equity at Dec. 31, 2019	11,601	1	1,937	7,952	(1,426)	3,137
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	415			415
Stockholders' Equity, Other | Accounting Standards Update 2018-02 [Member]	(12)			(12)
Other Comprehensive Income (Loss), Net of Tax	2,222					2,222
Dividends to stockholders, $2.80 per share	(182)			(182)
Treasury Stock, Value, Acquired, Cost Method	163				(163)
Reissuance of treasury stock	(10)		(12)	(25)	(27)
Proceeds from Issuance of Common Stock	481		481
Total stockholders equity at Dec. 31, 2020	$ 14,352	$ 1	$ 2,406	$ 8,148	$ (1,562)	$ 5,359

CONSOLIDATED STATEMENTS OF ST_2

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 2.80	$ 2.60	$ 2.20
Proceeds from Issuance of Common Stock	$ 481	$ 0	$ 0

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Cash flows from operating activities
Net Income (Loss) Attributable to Parent	$ 415	$ 870	$ 716
Change in operating assets and liabilities:
Accrued investment income	(11)	(4)	7
Premiums receivable and other reinsurance balances	162	110	(764)
Deferred policy acquisition costs	(95)	(198)	(107)
Reinsurance ceded receivable balances	(115)	(178)	66
Future policy benefits, other policy claims and benefits, and other reinsurance balances	2,819	1,537	1,593
Deferred income taxes	(16)	211	77
Other assets and other liabilities, net	225	113	(163)
Amortization of net investment premiums, discounts and other	(46)	(55)	(57)
Depreciation, Depletion and Amortization	49	49	45
Investment related (gains) losses, net	33	(91)	170
Other, net	(98)	(57)	(2)
Net cash provided by operating activities	3,322	2,307	1,581
Cash flows from investing activities
Sales of fixed maturity securities available-for-sale	6,514	13,214	9,340
Principal payments on mortgage loans on real estate	973	907	627
Proceeds from Sale of Available-for-sale Securities, Equity	181	98	46
Proceeds from Sale and Collection of Mortgage Notes Receivable	661	490	445
Proceeds from Collection of Policy Loans	102	82	57
Payments to Acquire Available-for-sale Securities	(9,619)	(15,664)	(9,724)
Payments to Acquire Available-for-sale Securities, Equity	(22)	(312)	(13)
Purchases of fixed maturity securities available-for-sale	(780)	(1,216)	(1,019)
Payments to Fund Policy Loans	(41)	(42)	(45)
Cash invested in funds withheld at interest	(131)	(60)	(54)
Purchase of businesses, net of cash acquired of $27 and $5	0	4	(32)
Payments to Acquire Property, Plant, and Equipment	(28)	(34)	(29)
Change in short-term investments	(155)	199	129
Change in other invested assets	(335)	(304)	(365)
Net cash used in investing activities	(2,680)	(2,638)	(637)
Cash flows from financing activities
Dividends to stockholders	(182)	(163)	(140)
Proceeds from Issuance of Common Stock	481	0	0
Repayment of collateral finance and securitization notes	(214)	(91)	(96)
Proceeds from long-term debt issuance	598	599	0
Debt issuance costs	(5)	(5)	0
Principal payments of long-term debt	(3)	(403)	(3)
Purchases of treasury stock	(163)	(101)	(300)
Exercise of stock options, net	1	6	3
Change in cash collateral for derivative positions and other arrangements	(32)	(163)	44
Deposits on universal life and other investment type policies and contracts	1,576	1,309	864
Withdrawals on universal life and other investment type policies and contracts	(803)	(1,109)	(694)
Net cash provided by (used in) financing activities	1,254	(121)	(322)
Effect of exchange rate changes on cash	63	11	(36)
Change in cash and cash equivalents	1,959	(441)	586
Cash and cash equivalents, beginning of period	1,449	1,890	1,304
Cash and cash equivalents, end of period	3,408	1,449	1,890
Supplementary information:
Interest paid	166	180	170
Income taxes paid, net of refunds	108	44	142
Transfer to Investments	93	6,275	4,636
Capital Expenditures Incurred but Not yet Paid	23	1	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	0	8	70
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	$ 0	$ (12)	$ (38)

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS CONSOLIDATED STATEMENTS OF CASH FLOWS PARENTHETICAL - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Cash Flows [Abstract]
Cash Acquired from Acquisition	$ 27	$ 5

Business and Basis of Presentat

Business and Basis of Presentation	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Basis of Presentation	BUSINESS AND BASIS OF PRESENTATION Business Reinsurance Group of America, Incorporated (“RGA”) is an insurance holding company that was formed on December 31, 1992. The consolidated financial statements herein include the assets, liabilities, and results of operations of RGA and its subsidiaries, all of which are wholly owned (collectively, the “Company”). The Company is engaged in providing traditional reinsurance, which includes individual and group life and health, disability, and critical illness reinsurance. The Company also provides financial solutions, which includes longevity reinsurance, asset-intensive products, primarily annuities, financial reinsurance, capital solutions and stable value products. Reinsurance is an arrangement under which an insurance company, the reinsurer, agrees to indemnify another insurance company, the ceding company, for all or a portion of the insurance risks underwritten by the ceding company. Reinsurance is designed to (i) reduce the net amount at risk on individual risks, thereby enabling the ceding company to increase the volume of business it can underwrite, as well as increase the maximum risk it can underwrite on a single risk; (ii) enhance the ceding company’s financial strength and surplus position; iii) stabilize operating results by leveling fluctuations in the ceding company’s loss experience; and (iv) assist the ceding company in meeting applicable regulatory requirements. Basis of Presentation The consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates include those used in determining deferred policy acquisition costs, premiums receivable, future policy benefits, incurred but not reported claims, income taxes, valuation of investments and investment impairments, and valuation of embedded derivatives. Actual results could differ materially from the estimates and assumptions used by management. The accompanying consolidated financial statements include the accounts of RGA and its subsidiaries, all of which are wholly owned, and any variable interest entities where the Company is the primary beneficiary. The Company evaluates variable interest entities in accordance with the general accounting principles for Consolidation . Entities in which the Company has significant influence over the operating and financing decisions but are not required to be consolidated are reported under the equity method of accounting. Intercompany balances and transactions have been eliminated. There were no subsequent events that would require disclosure or adjustments to the accompanying consolidated financial statements through the date the consolidated financial statements were issued.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES AND PRONOUNCEMENTS Investments Fixed Maturity Securities Fixed maturity securities classified as available-for-sale are reported at fair value and are so classified based upon the possibility that such securities could be sold prior to maturity if that action enables the Company to execute its investment philosophy and appropriately match investment results to operating and liquidity needs. Unrealized gains and losses on fixed maturity securities classified as available-for-sale, less applicable deferred income taxes as well as related adjustments to deferred acquisition costs, if applicable, are reflected as a direct charge or credit to accumulated other comprehensive income (“AOCI”) in stockholders’ equity. Investment income is recognized as it accrues or is legally due. Realized gains and losses on sales of investments are included in investment related gains (losses), net, as are impairments and change in allowance for credit losses. The cost of investments sold is primarily determined based upon the specific identification method. Equity Securities Equity securities are carried at fair value and realized and unrealized gains and losses are included in investment related gains (losses), net. Mortgage Loans on Real Estate Mortgage loans on real estate are carried at unpaid principal balances, net of any unamortized premium or discount, unamortized balance of loan origination fees and expenses, and valuation allowances. Interest income is accrued on the principal amount of the mortgage loan based on its contractual interest rate. Amortization of premiums, discounts, and loan origination fees are recorded using the effective yield method. The Company accrues interest on loans until it is probable the Company will not receive interest or the loan is 90 days past due. Interest income, amortization of premiums, accretion of discounts, amortization of loan origination fees and prepayment fees are reported in investment income, net of related expenses. Policy Loans Policy loans are reported at the unpaid principal balance. Interest income on such loans is recorded as earned using the contractually agreed-upon interest rate. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due the ceding company upon the death of the insured or surrender of the underlying policy. Funds Withheld at Interest Funds withheld at interest represent amounts contractually withheld by ceding companies in accordance with reinsurance agreements. For agreements written on a modified coinsurance (“modco”) basis and agreements written on a coinsurance funds withheld basis, assets that support the net statutory reserves or as defined in the treaty, are withheld and legally owned by the ceding company. Interest, recorded in investment income, net of related expenses in the consolidated statements of income, accrues to these assets at calculated rates as defined by the treaty terms. Changes in the value of the equity options held within the funds withheld portfolio associated with equity-indexed annuity treaties are reflected in investment income, net of related expenses. Short-term Investments Short-term investments represent investments with remaining maturities of one year or less, but greater than three months, at the time of acquisition and are stated at estimated fair value or amortized cost, which approximates estimated fair value. Interest on short-term investments is recorded in investment income, net of related expenses. Other Invested Assets In addition to derivative contracts discussed below, other invested assets include Federal Home Loan Bank of Des Moines (“FHLB”) common stock, limited partnership interests, joint ventures (other than operating joint ventures), lifetime mortgages and contractholder-directed investments. FHLB common stock are carried at cost as required by GAAP. Limited partnership interests which based on their nature and structure do not meet the characteristics of an equity security under applicable accounting standards, are primarily carried at cost. Joint ventures and certain limited partnerships are reported using the equity method of accounting. Lifetime mortgages are carried at unpaid principal balances, net of any unamortized premium or discount, unamortized balance of loan origination fees and expenses, and valuation allowances. Interest income is accrued on the principal amount of the lifetime mortgage based on its contractual interest rate. The fair value option (“FVO”) was elected for contractholder-directed investments supporting unit-linked variable annuity type liabilities that do not qualify for presentation and reporting as separate accounts. Changes in estimated fair value of these securities are included in investment income, net of related expenses. Securities Borrowing, Lending and Repurchase Agreements The Company participates in securities borrowing programs whereby securities, which are not reflected on the Company’s consolidated balance sheets, are borrowed from third parties. The borrowed securities are used to provide collateral under affiliated reinsurance transactions. The Company is generally required to maintain a minimum of 100% to 105% of the fair value, or par value under certain programs, of the borrowed securities as collateral. The collateral generally consists of rights to reinsurance treaty cash flows. If cash flows from the reinsurance treaties are insufficient to maintain the minimum collateral requirement, the Company may substitute cash or securities to meet the requirement. The Company participates in securities lending and repurchase/reverse repurchase programs whereby securities, reflected as investments on the Company’s consolidated balance sheets, are loaned or pledged to a third party. In return, the Company receives securities as collateral from the third parties, generally in an amount equal to a minimum of 100% to 105% of the fair value of the securities lent or pledged. The securities received as collateral are not reflected on the Company’s consolidated balance sheets. Allowance for Credit Losses and Impairments Fixed Maturity Securities The Company identifies fixed maturity securities that could result in a credit loss by monitoring market events that could impact issuers’ credit ratings, business climates, management changes, litigation, government actions and other similar factors. The Company also monitors late payments, pricing levels, rating agency actions, key financial ratios, financial statements, revenue forecasts and cash flow projections as indicators of credit issues. The Company reviews all securities on a case-by-case basis to determine whether a decline in value exists and whether an allowance for credit losses or impairment for non-credit losses should be recognized. The Company considers relevant facts and circumstances in evaluating whether a security is impaired due to credit or non-credit components. Relevant facts and circumstances considered include: (1) the reasons for the decline in fair value; (2) the issuer’s financial position and access to capital; and (3) the Company’s intent to sell a security or whether it is more likely than not it will be required to sell the security before the recovery of its amortized cost that, in some cases, may extend to maturity. Beginning on January 1, 2020, with the Company’s adoption of Financial Instruments – Credit Losse s, credit losses are recognized through an allowance account. Prior to January 1, 2020, credit losses were recognized as a reduction to the amortized cost. Credit impairments and changes in the allowance for credit losses on fixed maturity securities are reflected in investment related gains (losses), net on the consolidated statements of income. Non-credit impairment losses are recognized in accumulated other comprehensive income (“AOCI”). See “New Accounting Pronouncements” in Note 2 – “Significant Accounting Policies and Pronouncements” in the Notes to Consolidated Financial Statements for a discussion on the effect of the adoption of the standard on the Company’s consolidated financial statements. Impairment losses on fixed maturity securities recognized in the financial statements are dependent on the facts and circumstances related to the specific security. If the Company intends to sell a security or it is more likely than not that it would be required to sell a security before the recovery of its amortized cost, less any recorded credit loss, it recognizes an impairment loss in investment related gains (losses), net for the difference between amortized cost and fair value. The Company estimates the amount of the credit loss component of a fixed maturity security impairment as the difference between amortized cost and the present value of the expected cash flows of the security. The Company excludes accrued interest from the amortized cost and the present value of the expected cash flows of the security. The present value is determined using the best estimate cash flows discounted at the effective interest rate implicit to the security at the date of purchase or the current yield to accrete an asset-backed or floating rate security. The techniques and assumptions for establishing the best estimate cash flows vary depending on the type of security. The asset-backed securities’ cash flow estimates are based on security-specific facts and circumstances that may include collateral characteristics, expectations of delinquency and default rates, loss severity and prepayment speeds and structural support, including subordination and guarantees. The Company writes off uncollectible fixed maturity securities when (1) it has sufficient information to determine that the issuer of the security is insolvent or (2) it has received notice that the issuer of the security has filed for bankruptcy, and the collectability of the asset is expected to be adversely impacted by the bankruptcy. In periods after an impairment loss is recognized for non-credit loss components on a fixed maturity security, the Company will report the impaired security as if it had been purchased on the date it was impaired and will continue to estimate the present value of the estimated cash flows of the security. Mortgage Loans on Real Estate Beginning on January 1, 2020, with the Company’s adoption of Financial Instruments – Credit Losse s, valuation allowances on mortgage loans are computed on an expected loss basis using a model that utilizes probability of default and loss given default methods over the lifetime of the loan. Within the reasonable and supportable forecast period (i.e. typically two years), valuation allowances for mortgage loans are established based on several pool-level loan assumptions, defaults and loss severity, loss expectations for loans with similar risk characteristics and industry statistics. These evaluations are revised as conditions change and new information becomes available. The evaluation also includes the impact of expected changes in future macro-economic conditions. The Company reverts to historical loss information for periods beyond which it believes it is able to develop or obtain reasonable and supportable forecasts of future economic conditions. See “New Accounting Pronouncements” in Note 2 – “Significant Accounting Policies and Pronouncements” in the Notes to the Consolidated Financial Statements for a discussion on the effect of the adoption of the standard on the Company’s consolidated financial statements. Prior to January 1, 2020, valuation allowances on mortgage loans were computed on an incurred loss basis based upon several loan factors, including the Company’s historical experience for loan losses, defaults and loss severity, loss expectations for loans with similar risk characteristics and industry statistics. These evaluations were revised as conditions changed and new information became available. In addition to historical experience, management considered qualitative factors that included the impact of changing macro-economic conditions, which may or may not have been reflected in the loan portfolio performance, and the quality of the loan portfolio. Any interest accrued or received on the net carrying amount of the impaired loan is included in investment income or applied to the principal of the loan, depending on the assessment of the collectability of the loan. Mortgage loans deemed to be uncollectible or that have been foreclosed are charged off against the valuation allowances and subsequent recoveries, if any, are credited to the valuation allowances. Changes in valuation allowances are reported in investment related gains (losses), net on the consolidated statements of income. Other Invested Assets The Company considers its cost method investments for impairment when the carrying value of these investments exceeds the net asset value. The Company takes into consideration the severity and duration of this excess when deciding if the cost method investment is impaired. For equity method investments (including real estate joint ventures), the Company considers financial and other information provided by the investee, other known information and inherent risks in the underlying investments, as well as future capital commitments, in determining whether an impairment has occurred. Derivative Instruments Overview The Company utilizes a variety of derivative instruments including swaps, options, forwards and futures, primarily to manage or hedge interest rate risk, credit risk, inflation risk, foreign currency risk, market volatility and various other market risks associated with its business. The Company does not invest in derivatives for speculative purposes. It is the Company’s policy to enter into derivative contracts primarily with highly rated parties. See Note 5 – “Derivative Instruments” for additional detail on the Company’s derivative positions. Accounting and Financial Statement Presentation of Derivatives Derivatives are carried on the Company’s consolidated balance sheets primarily in other invested assets or other liabilities, at fair value. Certain derivatives are subject to master netting provisions and reported as a net asset or liability. On the date a derivative contract is executed, the Company designates the derivative as (1) a fair value hedge, (2) a cash flow hedge, (3) a net investment hedge in a foreign operation or (4) free-standing derivatives held for other risk management purposes, which primarily involve managing asset or liability risks associated with the Company’s reinsurance treaties that do not qualify for hedge accounting. Changes in the fair value of free-standing derivative instruments, which do not receive accounting hedge treatment, are primarily reflected in investment related gains (losses), net. Changes in the fair value of non-investment free-standing derivative instruments (e.g. mortality and longevity swaps), which do not receive accounting hedge treatment, are reflected in other revenues. Hedge Documentation and Hedge Effectiveness To qualify for hedge accounting, at the inception of the hedging relationship, the Company formally documents its risk management objective and strategy for undertaking the hedging transaction, as well as its designation of the hedge as either (i) a fair value hedge; (ii) a cash flow hedge; or (iii) a hedge of a net investment in a foreign operation. In this documentation, the Company sets forth how the hedging instrument is expected to hedge the designated risks related to the hedged item and sets forth the method that will be used to retrospectively and prospectively assess the hedging instrument’s effectiveness and the method that will be used to measure ineffectiveness. A derivative designated as a hedging instrument must be assessed as being highly effective in offsetting the designated risk of the hedged item. Hedge effectiveness is formally assessed at inception and periodically throughout the life of the designated hedging relationship. Under a fair value hedge, changes in the fair value of the hedging derivative, including amounts measured as ineffective, and changes in the fair value of the hedged item related to the designated risk being hedged, are reported within investment related gains (losses), net. The fair values of the hedging derivatives are exclusive of any accruals that are separately reported in the consolidated statements of income within investment income or interest expense to match the location of the hedged item. Under a cash flow hedge, changes in the fair value of the hedging derivative measured as effective are reported within AOCI and the deferred gains or losses on the derivative are reclassified into the consolidated statements of income when the Company’s earnings are affected by the variability in cash flows of the hedged item. The fair values of the hedging derivatives are exclusive of any accruals that are separately reported in the consolidated statements of income within investment income or interest expense to match the location of the hedged item. In a hedge of a net investment in a foreign operation, changes in the fair value of the hedging derivative that are measured as effective are reported within AOCI consistent with the translation adjustment for the hedged net investment in the foreign operation. Changes in the fair value of the hedging instrument measured as ineffective are reported within investment related gains (losses), net. The Company discontinues hedge accounting prospectively when: (i) it is determined that the derivative is no longer highly effective in offsetting changes in the estimated fair value or cash flows of a hedged item; (ii) the derivative expires, is sold, terminated, or exercised; (iii) it is no longer probable that the hedged forecasted transaction will occur; or (iv) the derivative is de-designated as a hedging instrument. When hedge accounting is discontinued because it is determined that the derivative is not highly effective, the derivative continues to be carried in the consolidated balance sheets at fair value, with changes in fair value recognized in investment related gains (losses), net. The carrying value of the hedged asset or liability under a fair value hedge is no longer adjusted for changes in its estimated fair value due to the hedged risk, and the cumulative adjustment to its carrying value is amortized into income over the remaining life of the hedged item. Provided the hedged forecasted transaction occurrence is still probable, the changes in estimated fair value of derivatives recorded in other comprehensive income (loss) (“OCI”) related to discontinued cash flow hedges are released into the consolidated statements of income when the Company’s earnings are affected by the variability in cash flows of the hedged item. When hedge accounting is discontinued because it is no longer probable that the forecasted transactions will occur on the anticipated date or within two months of that date, the derivative continues to be carried in the consolidated balance sheets at its estimated fair value, with changes in estimated fair value recognized currently in investment related gains (losses), net. Deferred gains and losses of a derivative recorded in OCI pursuant to the discontinued cash flow hedge of a forecasted transaction that is no longer probable are recognized immediately in investment related gains (losses), net. In all other situations in which hedge accounting is discontinued, the derivative is carried at its estimated fair value in the consolidated balance sheets, with changes in its estimated fair value recognized in the current period as investment related gains (losses), net. Embedded Derivatives The Company reinsures certain annuity products that contain terms that are deemed to be embedded derivatives, primarily equity-indexed annuities and variable annuities with guaranteed minimum benefits. The Company assesses reinsurance contract terms to identify embedded derivatives, which are required to be bifurcated under the general accounting principles for Derivatives and Hedging . If the contract is not reported for in its entirety at fair value and it is determined that the terms of the embedded derivative are not clearly and closely related to the economic characteristics of the host contract, and that a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is bifurcated from the host contract and accounted for separately. Embedded derivatives are carried on the consolidated balance sheets at fair value in the same line item as the host contract. Changes in the fair value of embedded derivatives associated with equity-indexed annuities are reflected in interest credited on the consolidated statements of income and changes in the fair value of embedded derivatives associated with variable annuity guaranteed minimum benefits are reflected in investment related gains (losses), net on the consolidated statements of income. See “Interest-Sensitive Contract Liabilities” below for additional information on embedded derivatives related to equity-indexed and variable annuities. The Company has implemented an economic hedging strategy to mitigate the volatility associated with its reinsurance of variable annuity guaranteed minimum benefits. The hedging strategy is designed such that changes in the fair value of the hedge contracts, primarily futures, swap contracts and options, move in the opposite direction of changes in the fair value of the embedded derivatives. While the Company actively manages its hedging program, the hedges that are in place may not be totally effective in offsetting the embedded derivative changes due to the many variables that must be managed and the Company may see a corresponding increase or decrease in the net liability. The Company has elected not to assess this hedging strategy for hedge accounting treatment. Additionally, reinsurance treaties written on a modco or funds withheld basis are subject to the general accounting principles for Derivatives and Hedging related to embedded derivatives. The Company’s funds withheld at interest balances are primarily associated with its reinsurance treaties structured on a modco or funds withheld basis, the majority of which were subject to the general accounting principles for Derivatives and Hedging related to embedded derivatives. Management believes the embedded derivative feature in each of these reinsurance treaties is similar to a total return swap on the assets held by the ceding companies. The valuation of embedded derivatives is sensitive to the investment credit spread environment. Changes in investment credit spreads are also affected by the application of a credit valuation adjustment (“CVA”). The fair value calculation of an embedded derivative in an asset position utilizes a CVA based on the ceding company’s credit risk. Conversely, the fair value calculation of an embedded derivative in a liability position utilizes a CVA based on the Company’s credit risk. Generally, an increase in investment credit spreads, ignoring changes in the CVA, will have a negative impact on the fair value of the embedded derivative (decrease in income). The fair value of the embedded derivatives is included in the funds withheld at interest line item on the consolidated balance sheets. The change in the fair value of the embedded derivatives is recorded in investment related gains (losses), net on the consolidated statements of income. The Company has entered into various financial reinsurance treaties on a funds withheld and modco basis. These treaties do not transfer significant insurance risk and are recorded on a deposit method of accounting with the Company earning a net fee. As a result of the experience refund provisions contained in these treaties, the value of the embedded derivatives in these contracts is currently considered immaterial. The Company monitors the performance of these treaties on a quarterly basis. Significant adverse performance or losses on these treaties may result in a loss associated with the embedded derivative. Fair Value Measurements General accounting principles for Fair Value Measurements and Disclosures define fair value, establish a framework for measuring fair value, establish a fair value hierarchy based on the inputs used to measure fair value and enhance disclosure requirements for fair value measurements. In compliance with these principles, the Company has categorized its assets and liabilities, based on the priority of the inputs to the valuation technique, into a three level hierarchy or separately for assets measured using the net asset value (“NAV”). The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1), the second highest priority to quoted prices in markets that are not active or inputs that are observable either directly or indirectly (Level 2) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure fair value fall within different levels of the hierarchy, the category level is based on the lowest priority level input that is significant to the fair value measurement of the asset or liability. See Note 6 – “Fair Value of Assets and Liabilities” for further details on the Company’s assets and liabilities recorded at fair value. Cash and Cash Equivalents Cash and cash equivalents include cash on deposit and highly liquid debt instruments purchased with an original maturity of three months or less. Premiums Receivable Premiums are accrued when due and in accordance with information received from the ceding company. When the Company enters into a new reinsurance agreement, it records accruals based on the terms of the reinsurance treaty. Similarly, when a ceding company fails to report information on a timely basis, the Company records accruals based on the terms of the reinsurance treaty as well as historical experience. Other management estimates include adjustments for increased in force on existing treaties, lapsed premiums given historical experience, the financial health of specific ceding companies, collateral value and the legal right of offset on related amounts (i.e. allowances and claims) owed to the ceding company. Under the legal right of offset provisions in its reinsurance treaties, the Company can withhold payments for allowances and claims from unpaid premiums. Based on its review of these factors and historical experience, the Company did not believe a provision for doubtful accounts was necessary as of December 31, 2020 or 2019. Reinsurance Ceded Receivables The Company generally reports retrocession activity on a gross basis. Amounts paid or deemed to have been paid for reinsurance are reflected in reinsurance ceded receivables. The cost of reinsurance related to long-duration contracts is recognized over the terms of the reinsured policies on a basis consistent with the reporting of those policies. Deferred Policy Acquisition Costs Costs of acquiring new business, which vary with and are directly related to the production of new business, have been deferred to the extent that such costs are deemed recoverable from future premiums or gross profits. Such costs include commissions and allowances as well as certain costs of policy issuance and underwriting. Non-commission costs related to the acquisition of new and renewal insurance contracts may be deferred only if they meet the following criteria: • Incremental direct costs of a successful contract acquisition • Portions of employees’ salaries and benefits directly related to time spent performing specified acquisition activities for a contract that has been acquired or renewed • Other costs directly related to the specified acquisition or renewal activities that would not have been incurred had that acquisition contract transaction not occurred The Company tests the recoverability for each year of business at issue before establishing additional deferred acquisition costs (“DAC”). The Company also performs annual tests to establish that DAC are expected to remain recoverable, and if financial performance significantly deteriorates to the point where a deficiency exists, a cumulative charge to current operations will be recorded. No such adjustments related to DAC recoverability were made in 2020, 2019 and 2018. DAC related to traditional life insurance contracts are amortized with interest over the premium-paying period of the related policies in proportion to the ratio of individual period premium revenues to total anticipated premium revenues over the life of the policy. Such anticipated premium revenues are estimated using the same assumptions used for computing liabilities for future policy benefits. DAC related to interest-sensitive life and investment-type policies are amortized over the lives of the policies, in proportion to the gross profits realized from mortality, investment income less interest credited, and expense margins. Other Reinsurance Balances The Company assumes and retrocedes financial reinsurance contracts that do not expose it to a reasonable possibility of loss from insurance risk. These contracts are reported as deposits and are included in other reinsurance assets/liabilities. The amount of revenue reported in other revenues on these contracts represents fees and the cost of insurance under the terms of the reinsurance agreement. Assets and liabilities are reported on a net or gross basis, depending on the specific details within each treaty. Reinsurance agreements reported on a net basis, where a legal right of offset exists, are generally included in other reinsurance balances on the consolidated balance sheets. Balances resulting from the assumption and/or subsequent transfer of benefits and obligations resulting from cash flows related to variable annuities have also been classified as other reinsurance balance assets and/or liabilities. Other reinsurance assets are included in premiums receivable and other reinsurance balances while other reinsurance liabilities are included in other reinsurance balances. Acquired Intangibles Goodwill and Value of Business Acquired Goodwill, reported in other assets, is not amortized into results of operations, but instead is reviewed at least annually for impairment and written down only in the periods in which the recorded value of goodwill exceeds its fair value. Goodwill as of December 31, 2020 and 2019, totaled $7 million. The value of business acquired (“VOBA”) is amortized in proportion to the ratio of annual premium revenues to total anticipated premium revenues or in relation to the present value of estimated profits. Anticipated premium revenues have been estimated using assumptions consistent with those used in estimating reserves for future policy benefits. The carrying value is reviewed at least annually for indicators of impairment in value. Carrying value of VOBA, net of accumulated amortization, was approximately $4 million and $5 million as of December 31, 2020 and 2019, respectively, and is reported in other assets. Amortization expense for the years ended December 31, 2020, 2019 and 2018, was $0.5 million, $0.7 million, and $0.4 million, respectively. Future amortization of VOBA is not material. Value of Distribution Agreements and Customer Relationships Acquired Value of distribution agreements (“VODA”) is reported in other assets and represents the present value of future profits associated with the expected future business derived from the distribution agreements. Value of customer relationships acquired (“VOCRA”) is also reported in other assets and represents the present value of the expected future profits associated with the expected future business acquired through existing customers of the acquired company or business. VODA is amortized over a useful life of 15 years and the VOCRA is also amortized over a 15 year period in proportion to expected revenues generated, with amortization included in policy acquisition costs and other insurance expenses. Each year the Company reviews VODA and VOCRA to determine the recoverability of these balances. VODA and VOCRA totaled approximately $25 million and $33 million, including accumulated amortization of $96 million and $88 million, as of December 31, 2020 and 2019, respectively. VODA and VOCRA amortization expense for the years ended December 31, 2020, 2019 and 2018 was $8 million, $8 million and $8 million, respectively. Amortization of the VODA and VOCRA is estimated to be $7 million, $6 million, $6 million and $6 million during 2021, 2022, 2023 and 2024, respectively,

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE The following table sets forth the computation of basic and diluted earnings per share on net income (in millions, except per share information): 2020 2019 2018 Earnings: Net income (numerator for basic and diluted calculations) $ 415 $ 870 $ 716 Shares: Weighted average outstanding shares (denominator for basic calculations) 65.4 62.7 63.7 Equivalent shares from outstanding stock awards 0.4 1.2 1.4 Diluted shares (denominator for diluted calculations) 65.8 63.9 65.1 Earnings per share: Basic $ 6.35 $ 13.88 $ 11.25 Diluted 6.31 13.62 11.00 The calculation of common equivalent shares does not include the impact of stock awards with a conversion price that exceeds the average stock price for the earnings period, as the result would be antidilutive. The calculation of common equivalent shares also excludes the impact of outstanding performance contingent shares, as the conditions necessary for their issuance have not been satisfied as of the end of the reporting period. Approximately 0.4 million, 0.2 million, and 0.1 million outstanding stock awards and approximately 0.3 million, 0.3 million and 0.4 million performance contingent shares were excluded from the calculation of common equivalent shares during 2020, 2019 and 2018, respectively.

Investments

Investments	12 Months Ended
	Dec. 31, 2020
Investments [Abstract]
Investments	INVESTMENTS Fixed Maturity Securities Available-for-Sale The Company holds various types of fixed maturity securities available-for-sale and classifies them as corporate securities (“Corporate”), Canadian and Canadian provincial government securities (“Canadian government”), residential mortgage-backed securities (“RMBS”), asset-backed securities (“ABS”), commercial mortgage-backed securities (“CMBS”), U.S. government and agencies (“U.S. government”), state and political subdivisions, and other foreign government, supranational and foreign government-sponsored enterprises (“Other foreign government”). RMBS, ABS and CMBS are collectively “structured securities.” The following tables provide information relating to investments in fixed maturity securities by type as of December 31, 2020 and 2019 (dollars in millions): December 31, 2020: Amortized Allowance for Credit Losses Unrealized Unrealized Estimated % of Total Available-for-sale: Corporate $ 31,963 $ 17 $ 4,356 $ 94 $ 36,208 63.9 % Canadian government 3,145 — 1,995 — 5,140 9.1 RMBS 1,735 — 84 2 1,817 3.2 ABS 3,099 — 35 42 3,092 5.4 CMBS 1,790 3 102 21 1,868 3.3 U.S. government 1,242 — 196 1 1,437 2.5 State and political subdivisions 1,237 — 157 4 1,390 2.4 Other foreign government 5,337 — 479 33 5,783 10.2 Total fixed maturity securities $ 49,548 $ 20 $ 7,404 $ 197 $ 56,735 100.0 % December 31, 2019: Amortized Unrealized Unrealized Estimated % of Total Available-for-sale: Corporate $ 29,205 $ 2,269 $ 81 $ 31,393 61.4 % Canadian government 3,016 1,596 — 4,612 9.0 RMBS 2,339 62 3 2,398 4.7 ABS 2,973 19 14 2,978 5.8 CMBS 1,841 61 3 1,899 3.7 U.S. government 2,096 57 1 2,152 4.2 State and political subdivisions 1,074 93 3 1,164 2.3 Other foreign government 4,209 321 5 4,525 8.9 Total fixed maturity securities $ 46,753 $ 4,478 $ 110 $ 51,121 100.0 % The Company enters into various collateral arrangements with counterparties that require both the pledging and acceptance of fixed maturity securities as collateral. Pledged fixed maturity securities are included in fixed maturity securities, available-for-sale in the consolidated balance sheets. Fixed maturity securities received as collateral are held in separate custodial accounts and are not recorded on the Company’s consolidated balance sheets. Subject to certain constraints, the Company is permitted by contract to sell or repledge collateral it receives; however, as of December 31, 2020 and 2019, none of the collateral received had been sold or repledged. The Company also holds assets in trust to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties. The following table includes fixed maturity securities pledged and received as collateral and assets in trust held to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Amortized Estimated Amortized Estimated Fixed maturity securities pledged as collateral $ 148 $ 162 $ 113 $ 116 Fixed maturity securities received as collateral n/a 1,784 n/a 727 Assets in trust held to satisfy collateral requirements 27,675 31,179 27,290 29,239 The Company monitors its concentrations of financial instruments on an ongoing basis and mitigates credit risk by maintaining a diversified investment portfolio that limits exposure to any one issuer. The Company’s exposure to concentrations of credit risk from single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies, as well as the securities disclosed below, as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Amortized Estimated Amortized Estimated Fixed maturity securities guaranteed or issued by: Government of Japan $ 1,493 $ 1,491 $ 813 $ 852 Canadian province of Quebec 1,303 2,474 1,205 2,163 Canadian province of Ontario 1,054 1,528 1,014 1,379 The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale as of December 31, 2020, are shown by contractual maturity in the table below (dollars in millions). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Structured securities are shown separately in the table below as they are not due at a single maturity date. Amortized Cost Estimated Fair Value Available-for-sale: Due in one year or less $ 1,351 $ 1,362 Due after one year through five years 8,248 8,797 Due after five years through ten years 10,676 11,956 Due after ten years 22,649 27,843 Structured securities 6,624 6,777 Total $ 49,548 $ 56,735 Corporate Fixed Maturity Securities The tables below show the major sectors of the Company’s corporate fixed maturity holdings as of December 31, 2020 and 2019 (dollars in millions): December 31, 2020: Amortized Cost Estimated % of Total Finance $ 11,785 $ 13,236 36.6 % Industrial 16,274 18,435 50.9 Utility 3,904 4,537 12.5 Total $ 31,963 $ 36,208 100.0 % December 31, 2019: Amortized Cost Estimated % of Total Finance $ 10,896 $ 11,653 37.2 % Industrial 14,692 15,803 50.3 Utility 3,617 3,937 12.5 Total $ 29,205 $ 31,393 100.0 % Allowance for Credit Losses and Impairments – Fixed Maturity Securities Available-for-Sale As discussed in Note 2 – “Significant Accounting Policies and Pronouncements,” allowances for credit losses on fixed maturity securities are recognized in investment related gains (losses), net on the consolidated statements of income. For these securities, the net amount recognized represents the difference between the amortized cost of the security and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the fixed maturity security prior to the allowance for credit losses. Any remaining difference between the fair value and amortized cost is recognized in AOCI. The following table presents the rollforward of the allowance for credit losses in fixed maturity securities by type for the year ended December 31, 2020 (dollars in millions) : Corporate CMBS Other Foreign Government Total Balance, beginning of period $ — $ — $ — $ — Credit losses recognized on securities for which credit losses were not previously recorded 36 3 2 41 Reductions for securities sold during the period (19) — (2) (21) Balance, end of period $ 17 $ 3 $ — $ 20 Unrealized Losses for Fixed Maturity Securities Available-for-Sale The following table presents the total gross unrealized losses for the 877 and 1,072 fixed maturity securities as of December 31, 2020 and 2019, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in millions): 2020 2019 Gross % of Total Gross % of Total Less than 20% $ 133 67.5 % $ 76 69.1 % 20% or more for less than six months 42 21.3 20 18.2 20% or more for six months or greater 22 11.2 14 12.7 Total $ 197 100.0 % $ 110 100.0 % The Company’s determination of whether a decline in value necessitates the recording of an allowance for credit losses includes an analysis of whether the issuer is current on its contractual payments, evaluating whether it is probable that the Company will be able to collect all amounts due according to the contractual terms of the security and analyzing the overall ability of the Company to recover the amortized cost of the investment. The following tables present the estimated fair values and gross unrealized losses for fixed maturity securities that have estimated fair values below amortized cost as of December 31, 2020 and 2019 (dollars in millions). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost. Less than 12 months 12 months or greater Total December 31, 2020: Estimated Gross Estimated Gross Estimated Gross Investment grade securities: Corporate $ 930 $ 29 $ 70 $ 5 $ 1,000 $ 34 RMBS 294 2 — — 294 2 ABS 1,096 17 570 11 1,666 28 CMBS 160 6 — — 160 6 U.S. government 27 1 — — 27 1 State and political subdivisions 66 1 16 3 82 4 Other foreign government 973 27 — — 973 27 Total investment grade securities 3,546 83 656 19 4,202 102 Below investment grade securities: Corporate 375 49 81 11 456 60 ABS 20 13 4 1 24 14 CMBS 91 15 — — 91 15 Other foreign government 36 3 28 3 64 6 Total below investment grade securities 522 80 113 15 635 95 Total fixed maturity securities $ 4,068 $ 163 $ 769 $ 34 $ 4,837 $ 197 Less than 12 months 12 months or greater Total December 31, 2019: Estimated Gross Estimated Gross Estimated Gross Investment grade securities: Corporate $ 1,936 $ 29 $ 293 $ 7 $ 2,229 $ 36 RMBS 367 2 84 1 451 3 ABS 773 5 739 9 1,512 14 CMBS 253 3 — — 253 3 U.S. government 49 1 — — 49 1 State and political subdivisions 103 2 12 1 115 3 Other foreign government 278 4 — — 278 4 Total investment grade securities 3,759 46 1,128 18 4,887 64 Below investment grade securities: Corporate 220 38 100 7 320 45 ABS — — — — — — CMBS — — — — — — Other foreign government — — 10 1 10 1 Total below investment grade securities 220 38 110 8 330 46 Total fixed maturity securities $ 3,979 $ 84 $ 1,238 $ 26 $ 5,217 $ 110 The Company has no intention to sell, nor does it expect to be required to sell, the securities outlined in the table above, as of the dates indicated. However, unforeseen facts and circumstances may cause the Company to sell fixed maturity securities in the ordinary course of managing its portfolio to meet certain diversification, credit quality and liquidity guidelines. Changes in unrealized losses are primarily driven by changes in interest rates. Investment Income, Net of Related Expenses Major categories of investment income, net of related expenses, consist of the following (dollars in millions): 2020 2019 2018 Fixed maturity securities available-for-sale $ 1,928 $ 1,786 $ 1,529 Equity securities 6 8 4 Mortgage loans on real estate 282 255 214 Policy loans 56 58 59 Funds withheld at interest 279 297 310 Short-term investments and cash and cash equivalents 7 28 14 Other invested assets 109 184 99 Investment income 2,667 2,616 2,229 Investment expense (92) (96) (90) Investment income, net of related expenses $ 2,575 $ 2,520 $ 2,139 Investment Related Gains (Losses), Net Investment related gains (losses), net, consist of the following (dollars in millions): 2020 2019 2018 Fixed maturity securities available for sale: Impairments and change in allowance for credit losses $ (21) $ (31) $ (28) Gain on investment activity 114 151 65 Loss on investment activity (82) (50) (159) Net gains (losses) on equity securities (15) 16 (20) Other impairment losses and change in mortgage loan provision (56) (12) (12) Derivatives and other, net 27 17 (16) Total investment related gains (losses), net $ (33) $ 91 $ (170) As of December 31, 2020, the Company held non-income producing securities with amortized costs, net of allowances, of $71 million and estimated fair values of $63 million. As of December 31, 2019, the Company held non-income producing securities with amortized costs of $47 million and estimated fair values of $51 million. Generally, securities are non-income producing when principal or interest is not paid primarily as a result of bankruptcies or credit defaults, but also include securities where amortization has been discontinued. Securities Borrowing, Lending and Repurchase Agreements The following table includes the amount of borrowed securities, loaned securities, and securities received as collateral as part of the securities lending program, and repurchased/reverse repurchased securities pledged and received as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Amortized Estimated Amortized Estimated Borrowed securities $ 118 $ 161 $ 339 $ 369 Securities lending: Securities loaned 94 105 98 104 Securities received n/a 102 n/a 107 Repurchase program/reverse repurchase program: Securities pledged 653 711 356 384 Securities received n/a 669 n/a 370 The Company did not hold cash collateral for securities lending and the repurchase program/reverse repurchase programs as of December 31, 2020. The Company held cash collateral for securities lending and the repurchase program/reverse repurchase programs of $1 million as of December 31, 2019. No cash or securities have been pledged by the Company for its securities borrowing program as of December 31, 2020 and 2019. The following tables present information on the Company’s securities lending and repurchase/reverse repurchase transactions as of December 31, 2020 and 2019, respectively (dollars in millions). Collateral associated with certain borrowed securities is not included within the tables as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows. December 31, 2020 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Securities lending transactions: Corporate $ — $ — $ — $ 105 $ 105 Total — — — 105 105 Repurchase/reverse repurchase transactions: Corporate — — — 417 417 Other foreign government — — — 294 294 Total — — — 711 711 Total transactions $ — $ — $ — $ 816 $ 816 Gross amount of recognized liabilities for securities lending and repurchase/reverse repurchase transactions in preceding table $ 771 Amounts related to agreements not included in offsetting disclosure $ 45 December 31, 2019 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Securities lending transactions: Corporate $ — $ — $ — $ 104 $ 104 Total — — — 104 104 Repurchase/reverse repurchase transactions: Corporate — — — 286 $ 286 Other foreign government — — — 98 98 Total — — — 384 384 Total transactions $ — $ — $ — $ 488 $ 488 Gross amount of recognized liabilities for securities lending and repurchase/reverse repurchase transactions in preceding table $ 478 Amounts related to agreements not included in offsetting disclosure $ 10 The Company has elected to offset amounts recognized as receivables and payables resulting from the repurchase/reverse repurchase programs. After the effect of offsetting, there was no liability presented on the consolidated balance sheets as of December 31, 2020. After the effect of offsetting, the net amount presented on the consolidated balance sheets was a liability of $1 million as of December 31, 2019. As of December 31, 2020, the Company did not have payables resulting from cash received as collateral associated with a repurchase/reverse repurchase agreements. As of December 31, 2019, the Company recognized payables resulting from cash received as collateral associated with a repurchase/reverse repurchase agreements. Amounts owed to and due from the counterparties may be settled in cash or offset, in accordance with the agreements. Mortgage Loans on Real Estate As of December 31, 2020, mortgage loans were geographically dispersed throughout the U.S. with the largest concentrations in California (14.6%), Texas (14.1%) and Washington (8.4%) and include loans secured by properties in Canada (3.2%) and United Kingdom (1.3%). The recorded investment in mortgage loans on real estate presented below is gross of unamortized deferred loan origination fees and expenses, and valuation allowances. The following table presents the distribution of the Company’s recorded investment in mortgage loans by property type as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Carrying Value Percentage of Carrying Value Percentage of Property type: Office $ 1,702 29.0 % $ 1,771 31.0 % Retail 1,711 29.3 1,686 29.4 Industrial 1,210 20.6 1,169 20.4 Apartment 808 13.8 766 13.4 Other commercial 430 7.3 335 5.8 Recorded investment 5,861 100.0 % 5,727 100.0 % Unamortized balance of loan origination fees and expenses (10) (9) Valuation allowances (64) (12) Total mortgage loans on real estate $ 5,787 $ 5,706 The following table presents the maturities of the Company’s recorded investment in mortgage loans as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Recorded % of Total Recorded % of Total Due within five years $ 2,276 38.8 % $ 1,841 32.2 % Due after five years through ten years 2,768 47.3 2,944 51.4 Due after ten years 817 13.9 942 16.4 Total $ 5,861 100.0 % $ 5,727 100.0 % The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of December 31, 2020 and 2019 (dollars in millions): Recorded Investment Debt Service Ratios Construction loans >1.20x 1.00x - 1.20x <1.00x Total % of Total December 31, 2020: Loan-to-Value Ratio 0% - 59.99% $ 2,774 $ 106 $ 17 $ 12 $ 2,909 49.6 % 60% - 69.99% 2,013 62 33 — 2,108 36.0 70% - 79.99% 555 49 13 — 617 10.5 80% or greater 189 21 17 — 227 3.9 Total $ 5,531 $ 238 $ 80 $ 12 $ 5,861 100.0 % Recorded Investment Debt Service Ratios Construction loans >1.20x 1.00x - 1.20x <1.00x Total % of Total December 31, 2019: Loan-to-Value Ratio 0% - 59.99% $ 3,025 $ 52 $ 7 $ — $ 3,084 53.8 % 60% - 69.99% 1,841 53 11 — 1,905 33.3 70% - 79.99% 492 13 39 — 544 9.5 80% or greater 96 61 37 — 194 3.4 Total $ 5,454 $ 179 $ 94 $ — $ 5,727 100.0 % The following table sets forth credit quality grades by year of origination of the Company’s recorded investment in mortgage loans as of December 31, 2020 (dollars in millions): Recorded Investment Year of Origination December 31, 2020: 2020 2019 2018 2017 2016 Prior Total Internal credit quality grade: High investment grade $ 411 $ 616 $ 493 $ 336 $ 574 $ 1,008 $ 3,438 Investment grade 352 496 399 407 249 368 2,271 Average — — — 19 37 55 111 Watch list — — — — — 4 4 In or near default — — — — — 37 37 Total $ 763 $ 1,112 $ 892 $ 762 $ 860 $ 1,472 $ 5,861 The following table presents the current and past due composition of the Company’s recorded investment in mortgage loans as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 31-60 days past due $ 15 $ — Total past due 15 — Current 5,846 5,727 Total $ 5,861 $ 5,727 The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances, as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Mortgage loans: Individually measured for impairment $ 37 $ 17 Collectively measured for impairment 5,824 5,710 Recorded investment $ 5,861 $ 5,727 Valuation allowances: Individually measured for impairment $ — $ — Collectively measured for impairment 64 12 Total valuation allowances $ 64 $ 12 The following table presents information regarding the Company’s loan valuation allowances for mortgage loans as of December 31, 2020, 2019 and 2018 (dollars in millions): 2020 2019 2018 Balance, beginning of period $ 12 $ 11 $ 9 Adoption of new accounting standard 14 — — Provision 38 1 2 Balance, end of period $ 64 $ 12 $ 11 The following table presents information regarding the portion of the Company’s mortgage loans that were impaired as of December 31, 2020 and 2019 (dollars in millions): Unpaid Principal Recorded Related Carrying Value December 31, 2020: Impaired mortgage loans with no valuation allowance recorded $ 37 $ 37 $ — $ 37 Impaired mortgage loans with valuation allowance recorded — — — — Total impaired mortgage loans $ 37 $ 37 $ — $ 37 December 31, 2019: Impaired mortgage loans with no valuation allowance recorded $ 17 $ 17 $ — $ 17 Impaired mortgage loans with valuation allowance recorded — — — — Total impaired mortgage loans $ 17 $ 17 $ — $ 17 The following table presents the Company’s average investment balance of impaired mortgage loans and the related interest income for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): 2020 2019 2018 Average Investment (1) Interest Average Investment (1) Interest Average Investment (1) Interest Impaired mortgage loans with no valuation allowance recorded $ 25 $ 1 $ 20 $ 1 $ 24 $ 1 Impaired mortgage loans with valuation allowance recorded — — — — — — Total $ 25 $ 1 $ 20 $ 1 $ 24 $ 1 (1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances. The Company did not acquire any impaired mortgage loans during the years ended December 31, 2020 and 2019. The Company had no mortgage loans that were on a nonaccrual status as of December 31, 2020 and 2019. For the year ended December 31, 2020, the Company modified the payment terms of approximately 52 commercial mortgage loans, with a carrying value of approximately $660 million in response to COVID-19. These loans met the criteria established in the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) and were not considered a troubled debt restructuring. In accordance with the CARES Act criteria, these loans were not more than 30 days past due at December 31, 2019, and the modifications included deferral or delayed payments of principal or interest on the loan. Policy Loans The majority of policy loans are associated with one client. These policy loans present no credit risk as the amount of the loan cannot exceed the obligation due to the ceding company upon the death of the insured or surrender of the underlying policy. The provisions of the treaties in force and the underlying policies determine the policy loan interest rates. The Company earns a spread between the interest rate earned on policy loans and the interest rate credited to corresponding liabilities. Funds Withheld at Interest As of December 31, 2020, $3.2 billion of the funds withheld at interest balance is associated with one client. For reinsurance agreements written on a modco basis and certain agreements written on a coinsurance funds withheld basis, assets equal to the net statutory reserves are withheld and legally owned and managed by the ceding company and are reflected as funds withheld at interest. In the event of a ceding company’s insolvency, the Company would need to assert a claim on the assets supporting its reserve liabilities. However, the risk of loss to the Company is mitigated by its ability to offset amounts it owes the ceding company for claims or allowances against amounts owed to the Company from the ceding company. Other Invested Assets Other invested assets include limited partnership interests, joint ventures (other than operating joint ventures), lifetime mortgages, derivative contracts and fair value option (“FVO”) contractholder-directed unit-linked investments. Other invested assets also includes FHLB common stock, which is included in Other in the table below. The allowance for credit losses for lifetime mortgages as of both December 31, 2020 and 2019, was $2 million. Carrying values of these assets as of December 31, 2020 and 2019 are as follows (dollars in millions): 2020 2019 Limited partnership interests and real estate joint ventures $ 1,367 $ 1,134 Lifetime mortgages 935 775 Derivatives 140 117 FVO contractholder-directed unit-linked investments 289 260 Other 98 77 Total other invested assets $ 2,829 $ 2,363

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	DERIVATIVE INSTRUMENTS Accounting for Derivative Instruments and Hedging Activities See Note 2 – “Significant Accounting Policies and Pronouncements” for a detailed discussion of the accounting treatment for derivative instruments, including embedded derivatives and Note 6 – “Fair Value of Assets and Liabilities” for additional disclosures related to the fair value hierarchy for derivative instruments, including embedded derivatives. Types of Derivatives Used by the Company Credit Derivatives The Company sells protection under single name credit default swaps and credit default swap index tranches to diversify its credit risk exposure in certain portfolios and, in combination with purchasing securities, to replicate characteristics of similar investments based on the credit quality and term of the credit default swap. Credit default triggers for indexed reference entities and single name reference entities are defined in the contracts. The Company’s maximum exposure to credit loss equals the notional value for credit default swaps. In the event of default of a referencing entity, the Company is typically required to pay the protection holder the full notional value less a recovery amount determined at auction. The Company also purchases credit default swaps to reduce its risk against a drop in bond prices due to credit concerns of certain bond issuers. If a credit event, as defined by the contract, occurs, the Company is able to put the bond back to the counterparty at par. Equity Derivatives Exchange-traded equity futures are used primarily to economically hedge liabilities embedded in certain variable annuity products. With exchange-traded equity futures transactions, the Company agrees to purchase or sell a specified number of contracts, the value of which is determined by the relevant stock indices, and to post variation margin on a daily basis in an amount equal to the difference between the daily estimated fair values of those contracts. The Company enters into exchange-traded equity futures with regulated futures commission merchants that are members of the exchange. Equity index options are used by the Company primarily to hedge minimum guarantees embedded in certain variable annuity products. To hedge against adverse changes in equity indices volatility, the Company buys put options. The contracts are net settled in cash based on differentials in the indices at the time of exercise and the strike price. Foreign Currency Derivatives Foreign currency swaps are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency swap transaction, the Company agrees with another party to exchange, at specified intervals, the difference between one currency and another at a forward exchange rate calculated by reference to an agreed upon principal amount. The principal amount of each currency is exchanged at the termination of the currency swap by each party. The Company uses foreign currency swaps in hedges of net investments in foreign operations and fair value hedges. Foreign currency forwards are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency forward transaction, the Company agrees with another party to deliver a specified amount of an identified currency at a specified future date. The price is agreed upon at the time of the contract and payment for such a contract is made in a different currency at the specified future date. The Company uses foreign currency forwards in hedges of net investments in foreign operations and non-qualifying hedge relationships. Interest Rate Derivatives Interest rate swaps are used by the Company primarily to reduce market risks from changes in interest rates, to alter interest rate exposure arising from mismatches between assets and liabilities (duration mismatches) and to manage the risk of cash flows of liabilities that are variable based on a benchmark rate. With an interest rate swap, the Company agrees with another party to exchange, at specified intervals, the difference between two rates, which can be either fixed-rate or floating-rate interest amounts, tied to an agreed-upon notional principal amount. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments at each due date. The Company utilizes interest rate swaps in cash flow and non-qualifying hedging relationships. Other Derivatives Consumer price index (“CPI”) swaps are used by the Company primarily to economically hedge liabilities embedded in certain insurance products where value is directly affected by changes in a designated benchmark consumer price index. With a CPI swap transaction, the Company agrees with another party to exchange the actual amount of inflation realized over a specified period of time for a fixed amount of inflation determined at inception. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments to be made by the counterparty at each due date. Most of these swaps will require a single payment to be made by one counterparty at the maturity date of the swap. The Company has entered into longevity swaps in the form of out-of-the-money options, which provide protection against changes in mortality improvement to retirement plans and insurers of such plans. With a longevity swap transaction, the Company agrees with another party to exchange a proportion of a notional value. The proportion is determined by the difference between a predefined benefit, and the realized benefit plus the future expected benefit, calculated by reference to a population index for a fixed premium. Mortality swaps have been used by the Company to hedge risk from changes in mortality experience associated with its reinsurance of life insurance risk. The Company agrees with another party to exchange, at specified intervals, a proportion of a notional value determined by the difference between a predefined expected and realized claim amount on a designated index of reinsured lives, for a fixed percentage (premium) each term. The Company sells fee-based synthetic guaranteed investment contracts (“GICs”) to retirement plans that include investment-only, stable value contracts. The assets are owned by the trustees of such plans, who invest the assets under the terms of investment guidelines to which the Company agrees. The contracts contain a guarantee of a minimum rate of return on participant balances supported by the underlying assets, and a guarantee of liquidity to meet certain participant-initiated plan cash flow requirements. These contracts are reported as derivatives and recorded at fair value. The Company has certain embedded derivatives that are required to be separated from their host contracts and reported as derivatives. Host contracts include reinsurance treaties structured on a modco or funds withheld basis. Additionally, the Company reinsures equity-indexed annuity and variable annuity contracts with benefits that are considered embedded derivatives, including guaranteed minimum withdrawal benefits, guaranteed minimum accumulation benefits, and guaranteed minimum income benefits. The changes in fair values of embedded derivatives on equity-indexed annuities described below relate to changes in the fair value associated with capital market and other related assumptions. The Company’s utilization of a credit valuation adjustment increased the fair value of its embedded derivatives by approximately $70 million for the year ended December 31, 2020, and did not have a material effect on the change in fair value for the years ended December 31, 2019 and 2018. Summary of Derivative Positions Derivatives, except for embedded derivatives and longevity and mortality swaps, are included in other invested assets or other liabilities, at fair value. Longevity and mortality swaps, which have been discontinued or matured in 2019, are included in other assets or other liabilities, at fair value. Embedded derivative assets and liabilities on modco or funds withheld arrangements are included on the consolidated balance sheets with the host contract in funds withheld at interest, at fair value. Embedded derivative liabilities on indexed annuity and variable annuity products are included on the consolidated balance sheets with the host contract in interest-sensitive contract liabilities, at fair value. The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of December 31, 2020 and 2019 (dollars in millions): December 31, 2020 December 31, 2019 Primary Underlying Risk Notional Carrying Value/Fair Value Notional Carrying Value/Fair Value Amount Assets Liabilities Amount Assets Liabilities Derivatives not designated as hedging instruments: Interest rate swaps Interest rate $ 1,084 $ 93 $ 1 $ 909 $ 70 $ 3 Financial futures Equity 258 — — 307 — — Foreign currency swaps Foreign currency 150 — 18 150 — 9 Foreign currency forwards Foreign currency 347 4 2 175 1 — CPI swaps CPI 612 11 19 441 — 28 Credit default swaps Credit 1,517 13 — 1,306 5 — Equity options Equity 395 29 — 364 15 — Synthetic GICs Interest rate 16,644 — — 13,823 — — Embedded derivatives in: Modco or funds withheld arrangements — 58 — — 121 — Indexed annuity products — — 752 — — 767 Variable annuity products — — 155 — — 163 Total non-hedging derivatives 21,007 208 947 17,475 212 970 Derivatives designated as hedging instruments: Interest rate swaps Foreign currency/Interest rate 802 3 24 535 1 29 Foreign currency swaps Foreign currency 234 8 1 342 17 2 Foreign currency forwards Foreign currency 1,255 10 15 1,094 28 2 Total hedging derivatives 2,291 21 40 1,971 46 33 Total derivatives $ 23,298 $ 229 $ 987 $ 19,446 $ 258 $ 1,003 Fair Value Hedges The Company designates and reports certain foreign currency swaps to hedge the foreign currency fair value exposure of foreign currency denominated assets as fair value hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging . The gain or loss on the hedged item attributable to a change in foreign currency and the offsetting gain or loss on the related foreign currency swaps as of December 31, 2020, 2019 and 2018 were (dollars in millions): Type of Fair Value Hedge Hedged Item Gains (Losses) Recognized for Derivatives Gains (Losses) Recognized for Hedged Items Investment Related Gains (Losses) For the Year Ended December 31, 2020: Foreign currency swaps Foreign-denominated fixed maturity securities $ 8 $ (10) For the Year Ended December 31, 2019: Foreign currency swaps Foreign-denominated fixed maturity securities $ (4) $ — For the Year Ended December 31, 2018: Foreign currency swaps Foreign-denominated fixed maturity securities $ (11) $ 12 Cash Flow Hedges Certain derivative instruments are designated as cash flow hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging . The Company designates and accounts for the following as cash flow hedges: (i) certain interest rate swaps, in which the cash flows of assets and liabilities are variable based on a benchmark rate; and (ii) certain interest rate swaps, in which the cash flows of assets are denominated in different currencies, commonly referred to as cross-currency swaps. The following table presents the components of AOCI, before income tax, and the consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): Amounts Included in AOCI Balance December 31, 2017 $ 3 Gains (losses) deferred in other comprehensive income (loss) 6 Amounts reclassified to investment income — Amounts reclassified to interest expense — Balance December 31, 2018 9 Gains (losses) deferred in other comprehensive income (loss) (34) Amounts reclassified to investment income — Amounts reclassified to interest expense (1) Balance December 31, 2019 (26) Gains (losses) deferred in other comprehensive income (loss) (27) Amounts reclassified to investment income — Amounts reclassified to interest expense 4 Balance December 31, 2020 $ (49) As of December 31, 2020, approximately $6 million of before-tax deferred net losses on derivative instruments recorded in AOCI are expected to be reclassified to interest expense during the next twelve months. For the same time period, approximately $1 million of before-tax deferred net gains expected to be reclassified to investment income during the next twelve months. The following table presents the effect of derivatives in cash flow hedging relationships on the consolidated statements of income and the consolidated statements of stockholders’ equity for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): Derivative Type Gains (Losses) Deferred in OCI Gains (Losses) Reclassified into Income from OCI For the year ended December 31, 2020: Investment Related Gains (Losses) Investment Income Interest Expense Interest rate $ (33) $ — $ — $ (4) Foreign currency/Interest rate 6 — — — Total $ (27) $ — $ — $ (4) For the year ended December 31, 2019: Interest rate $ (32) $ — $ — $ 1 Foreign currency/Interest rate (2) — — — Total $ (34) $ — $ — $ 1 For the year ended December 31, 2018: Interest rate $ 12 $ — $ — $ — Foreign currency/Interest rate (6) — — — Total $ 6 $ — $ — $ — For the years ended December 31, 2020, 2019 and 2018, there were no material amounts reclassified into earnings relating to instances in which the Company discontinued cash flow hedge accounting because the forecasted transaction did not occur by the anticipated date or within the additional time period permitted by the authoritative guidance for the accounting for derivatives and hedging. Hedges of Net Investments in Foreign Operations The Company uses foreign currency swaps and foreign currency forwards to hedge a portion of its net investment in certain foreign operations against adverse movements in exchange rates. The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): Derivative Gains (Losses) Deferred in AOCI For the year ended Type of NIFO Hedge 2020 2019 2018 Foreign currency swaps $ 1 $ (9) $ 31 Foreign currency forwards (30) (24) 56 Total $ (29) $ (33) $ 87 The cumulative foreign currency translation gain recorded in AOCI related to these hedges was $139 million and $168 million as of December 31, 2020 and 2019, respectively. If a hedged foreign operation was sold or substantially liquidated, the amounts in AOCI would be reclassified to the consolidated statements of income. A pro rata portion would be reclassified upon partial sale of a hedged foreign operation. There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented. Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging The Company uses various other derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment. The gain or loss related to the change in fair value for these derivative instruments is recognized in investment related gains (losses), net in the consolidated statements of income, except where otherwise noted. A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s consolidated statements of income for the years ended December 31, 2020, 2019 and 2018 is as follows (dollars in millions): Gains (Losses) for the Years Ended December 31, Type of Non-hedging Derivative Income Statement 2020 2019 2018 Interest rate swaps Investment related gains (losses), net $ 76 $ 65 $ (21) Financial futures Investment related gains (losses), net (47) (46) 21 Foreign currency swaps Investment related gains (losses), net (7) — (4) Foreign currency forwards Investment related gains (losses), net 5 1 — Consumer price index swaps Investment related gains (losses), net 16 (18) (10) Credit default swaps Investment related gains (losses), net 16 30 (2) Equity options Investment related gains (losses), net — (40) 7 Longevity swaps Other revenues — 13 9 Mortality swaps Other revenues — (1) — Subtotal 59 4 — Embedded derivatives in: Modco or funds withheld arrangements Investment related gains (losses), net (62) 11 (13) Indexed annuity products Interest credited (30) (57) 27 Variable annuity products Investment related gains (losses), net 8 5 (15) Total non-hedging derivatives $ (25) $ (37) $ (1) Credit Derivatives The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Rating Agency Designation of Referenced Credit Obligations (1) Estimated Fair Maximum Amount of Future Payments under Credit Default Swaps (2) Weighted Average Years to Maturity (3) Estimated Fair Maximum (2) Weighted (3) AAA/AA+/AA/AA-/A+/A/A- Single name credit default swaps $ 11 $ 287 15.0 $ 2 $ 142 1.7 Subtotal 11 287 15.0 2 142 1.7 BBB+/BBB/BBB- Single name credit default swaps 2 232 1.6 3 291 1.9 Credit default swaps referencing indices — 988 3.9 — 873 4.7 Subtotal 2 1,220 3.5 3 1,164 4.0 BB+/BB/BB- Single name credit default swaps — 10 0.7 — — 0.0 Subtotal — 10 0.7 — — 0.0 Total $ 13 $ 1,517 5.6 $ 5 $ 1,306 3.7 (1) The rating agency designations are based on ratings from Standard and Poor’s (“S&P”). (2) Assumes the value of the referenced credit obligations is zero. (3) The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts. Netting Arrangements and Credit Risk Certain of the Company’s derivatives are subject to enforceable master netting arrangements and reported as a net asset or liability in the consolidated balance sheets. The Company nets all derivatives that are subject to such arrangements. The Company has elected to include all derivatives, except embedded derivatives, in the tables below, irrespective of whether they are subject to an enforceable master netting arrangement or a similar agreement. See Note 4 – “Investments” for information regarding the Company’s securities borrowing, lending, and repurchase/reverse repurchase programs. See “Embedded Derivatives” above for information regarding the Company’s bifurcated embedded derivatives. The following table provides information relating to the netting of the Company’s derivative instruments as of December 31, 2020 and December 31, 2019 (dollars in millions): Gross Amounts Not Gross Amounts Gross Amounts Net Amounts Financial Instruments (1) Cash Collateral Net Amount December 31, 2020: Derivative assets $ 171 $ (31) $ 140 $ (30) $ (98) $ 12 Derivative liabilities 80 (31) 49 (146) (47) (144) December 31, 2019: Derivative assets $ 137 $ (20) $ 117 $ — $ (119) $ (2) Derivative liabilities 73 (20) 53 (92) (52) (91) (1) Includes initial margin posted to a central clearing partner. The Company may be exposed to credit-related losses in the event of non-performance by counterparties to derivative financial instruments. Generally, the credit exposure of the Company’s derivative contracts is limited to the fair value and accrued interest of non-collateralized derivative contracts in an asset position at the reporting date. As of December 31, 2020, the Company had credit exposure of $19 million. Derivatives may be exchange-traded or they may be privately negotiated contracts, which are referred to as over-the-counter (“OTC”) derivatives. Certain of the Company’s OTC derivatives are cleared and settled through central clearing counterparties (“OTC cleared”) and others are bilateral contracts between two counterparties. The Company manages its credit risk related to OTC derivatives by entering into transactions with creditworthy counterparties, maintaining collateral arrangements and through the use of master netting agreements that provide for a single net payment to be made by one counterparty to another at each due date and upon termination. The Company is only exposed to the default of the central clearing counterparties for OTC cleared derivatives, and these transactions require initial and daily variation margin collateral postings. Exchange-traded derivatives are settled on a daily basis, thereby reducing the credit risk exposure in the event of non-performance by counterparties to such financial instruments.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	FAIR VALUE OF ASSETS AND LIABILITIES Fair Value Measurement General accounting principles for Fair Value Measurements and Disclosures define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. These principles also establish a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value and describes three levels of inputs that may be used to measure fair value: Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities. Active markets are defined as having the following characteristics for the measured asset/liability: (i) many transactions, (ii) current prices, (iii) price quotes not varying substantially among market makers, (iv) narrow bid/ask spreads and (v) most information publicly available. The Company’s Level 1 assets and liabilities are traded in active exchange markets. Level 2 – Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or market standard valuation techniques and assumptions that use significant inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Such observable inputs include benchmarking prices for similar assets in active, liquid markets, quoted prices in markets that are not active and observable yields and spreads in the market. The Company’s Level 2 assets and liabilities include investment securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose values are determined using market standard valuation techniques. Level 2 valuations are generally obtained from third party pricing services for identical or comparable assets or liabilities or through the use of valuation methodologies using observable market inputs. Prices from servicers are validated through analytical reviews and assessment of current market activity. Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the related assets or liabilities. Level 3 assets and liabilities include those whose value is determined using market standard valuation techniques described above. When observable inputs are not available, the market standard techniques for determining the estimated fair value of certain securities that trade infrequently, and therefore have little transparency, rely on inputs that are significant to the estimated fair value and that are not observable in the market or cannot be derived principally from or corroborated by observable market data. These unobservable inputs can be based in large part on management judgment or estimation and cannot be supported by reference to market activity. Even though unobservable, management believes these inputs are based on assumptions deemed appropriate given the circumstances and consistent with what other market participants would use when pricing similar assets and liabilities. Prices are determined using valuation methodologies such as discounted cash flow models and other similar techniques that require management’s judgment or estimation in developing inputs that are consistent with those other market participants would use when pricing similar assets and liabilities. Non-binding broker quotes, which are utilized when pricing service information is not available, are reviewed for reasonableness based on the Company’s understanding of the market, and are generally considered Level 3. Under certain circumstances, based on its observations of transactions in active markets, the Company may conclude the prices received from independent third party pricing services or brokers are not reasonable or reflective of market activity. In those instances, the Company would apply internally developed valuation techniques to the related assets or liabilities. Additionally, the Company’s embedded derivatives, all of which are associated with reinsurance treaties, and longevity and mortality swaps are classified in Level 3 since their values include significant unobservable inputs. When inputs used to measure the fair value of an asset or liability fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety, except for fair value measurements using NAV. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, gains and losses for such assets and liabilities categorized within Level 3 may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). Assets and Liabilities by Hierarchy Level Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020 and 2019 are summarized below (dollars in millions): December 31, 2020: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate $ 36,208 $ — $ 33,179 $ 3,029 Canadian government 5,140 — 5,140 — RMBS 1,817 — 1,814 3 ABS 3,092 — 2,896 196 CMBS 1,868 — 1,813 55 U.S. government 1,437 1,312 111 14 State and political subdivisions 1,390 — 1,381 9 Other foreign government 5,783 — 5,766 17 Total fixed maturity securities – available-for-sale 56,735 1,312 52,100 3,323 Equity securities 132 79 — 53 Funds withheld at interest – embedded derivatives & other 114 — — 114 Cash equivalents 1,478 1,478 — — Short-term investments 197 32 150 15 Other invested assets: Derivatives 140 — 140 — FVO contractholder-directed unit-linked investments 289 224 65 — Total other invested assets 429 224 205 — Total $ 59,085 $ 3,125 $ 52,455 $ 3,505 Liabilities: Interest-sensitive contract liabilities – embedded derivatives $ 907 $ — $ — $ 907 Other liabilities: Derivatives 49 — 49 — Total $ 956 $ — $ 49 $ 907 December 31, 2019: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate $ 31,393 $ — $ 29,207 $ 2,186 Canadian government 4,612 — 3,908 704 RMBS 2,398 — 2,349 49 ABS 2,978 — 2,865 113 CMBS 1,899 — 1,853 46 U.S. government 2,152 2,030 106 16 State and political subdivisions 1,164 — 1,155 9 Other foreign government 4,525 — 4,509 16 Total fixed maturity securities – available-for-sale 51,121 2,030 45,952 3,139 Equity securities 320 243 — 77 Funds withheld at interest – embedded derivatives 121 — — 121 Cash equivalents 274 274 — — Short-term investments 32 4 26 2 Other invested assets: Derivatives 117 — 117 — FVO contractholder-directed unit-linked investments 260 207 53 — Total other invested assets 377 207 170 — Total $ 52,245 $ 2,758 $ 46,148 $ 3,339 Liabilities: Interest-sensitive contract liabilities – embedded derivatives $ 930 $ — $ — $ 930 Other liabilities: Derivatives 53 — 53 — Total $ 983 $ — $ 53 $ 930 The Company may utilize information from third parties, such as pricing services and brokers, to assist in determining the fair value for certain assets and liabilities; however, management is ultimately responsible for all fair values presented in the Company’s financial statements. This includes responsibility for monitoring the fair value process, ensuring objective and reliable valuation practices and pricing of assets and liabilities, and approving changes to valuation methodologies and pricing sources. The selection of the valuation technique(s) to apply considers the definition of an exit price and the nature of the asset or liability being valued and significant expertise and judgment is required. The Company performs initial and ongoing analysis and review of the various techniques utilized in determining fair value to ensure that they are appropriate and consistently applied, and that the various assumptions are reasonable. The Company analyzes and reviews the information and prices received from third parties to ensure that the prices represent a reasonable estimate of the fair value and to monitor controls around pricing, which includes quantitative and qualitative analysis and is overseen by the Company’s investment and accounting personnel. Examples of procedures performed include, but are not limited to, review of pricing trends, comparison of a sample of executed prices of securities sold to the fair value estimates, comparison of fair value estimates to management’s knowledge of the current market, and ongoing confirmation that third party pricing services use, wherever possible, market-based parameters for valuation. In addition, the Company utilizes both internal and external cash flow models to analyze the reasonableness of fair values utilizing credit spread and other market assumptions, where appropriate. As a result of the analysis, if the Company determines there is a more appropriate fair value based upon the available market data, the price received from the third party is adjusted accordingly. The Company also determines if the inputs used in estimated fair values received from pricing services are observable by assessing whether these inputs can be corroborated by observable market data. For assets and liabilities reported at fair value, the Company utilizes, when available, fair values based on quoted prices in active markets that are regularly and readily obtainable. Generally, these are very liquid investments and the valuation does not require management judgment. When quoted prices in active markets are not available, fair value is based on market valuation techniques, market comparable pricing and the income approach. The use of different techniques, assumptions and inputs may have a material effect on the estimated fair values of the Company’s securities holdings. For the periods presented, the application of market standard valuation techniques applied to similar assets and liabilities has been consistent. The methods and assumptions the Company uses to estimate the fair value of assets and liabilities measured at fair value on a recurring basis are summarized below. Fixed Maturity Securities – The fair values of the Company’s publicly-traded fixed maturity securities are generally based on prices obtained from independent pricing services. Prices from pricing services are sourced from multiple vendors, and a vendor hierarchy is maintained by asset type based on historical pricing experience and vendor expertise. The Company generally receives prices from multiple pricing services for each security, but ultimately uses the price from the vendor that is highest in the hierarchy for the respective asset type. To validate reasonableness, prices are periodically reviewed as explained above. Consistent with the fair value hierarchy described above, securities with quotes from pricing services are generally reflected within Level 2, as they are primarily based on observable pricing for similar assets and/or other market observable inputs. If the pricing information received from third party pricing services is not reflective of market activity or other inputs observable in the market, the Company may challenge the price through a formal process with the pricing service. If the Company ultimately concludes that pricing information received from the independent pricing service is not reflective of fair value, non-binding broker quotes are used, if available. If the Company concludes that the values from both pricing services and brokers are not reflective of fair value, an internally developed valuation may be prepared; however, this occurs infrequently. Internally developed valuations or non-binding broker quotes are also used to determine fair value in circumstances where vendor pricing is not available. These valuations may use significant unobservable inputs, which reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset. Observable market data may not be available in certain circumstances such as market illiquidity and credit events related to the security. Pricing service overrides, internally developed valuations and non-binding broker quotes are generally based on significant unobservable inputs and are reflected as Level 3 in the valuation hierarchy. The inputs used in the valuation of corporate and government securities include, but are not limited to standard market observable inputs that are derived from, or corroborated by, market observable data including market yield curve, duration, call provisions, observable prices and spreads for similar publicly traded or privately placed issues that incorporate the credit quality and industry sector of the issuer. For internal pricing of private placements and structured securities, valuation is based primarily on matrix pricing or other similar techniques using standard market inputs including spreads for actively traded securities, spreads off benchmark yields, expected prepayment speeds and volumes, current and forecasted loss severity, rating, weighted average coupon, weighted average maturity, average delinquency rates, geographic region, debt service coverage ratios and issuance-specific information including, but not limited to: collateral type, payment terms of the underlying assets, payment priority within the tranche, structure of the security, deal performance and vintage of loans. When observable inputs are not available, the market standard valuation techniques for determining the estimated fair value of certain types of securities that trade infrequently, and therefore have little or no price transparency, rely on inputs that are significant to the estimated fair value that are not observable in the market or cannot be derived principally from or corroborated by observable market data, such as market illiquidity. Other significant unobservable inputs used in the fair value measurement of the Company’s private debt investments include a multiple of earnings before interest, taxes, depreciation and amortization (“EBITDA”). These unobservable inputs can be based in large part on management judgment or estimation, and cannot be supported by reference to market activity. Even though unobservable, these inputs are based on assumptions deemed appropriate given the circumstances and are believed to be consistent with what other market participants would use when pricing such securities. Embedded Derivatives & Other – The fair value of embedded derivative liabilities, including those calculated by third parties, are monitored through the use of attribution reports to quantify the effect of underlying sources of fair value change, including capital market inputs based on policyholder account values, interest rates and short-term and long-term implied volatilities, from period to period. Actuarial assumptions are based on experience studies performed internally in combination with available industry information and are reviewed on a periodic basis, at least annually. For embedded derivative liabilities associated with the underlying products in reinsurance treaties, primarily equity-indexed and variable annuity treaties, the Company utilizes a discounted cash flow model, which includes an estimate of future equity option purchases and an adjustment for a CVA. The variable annuity embedded derivative calculations are performed by third parties based on methodology and input assumptions provided by the Company. To validate the reasonableness of the resulting fair value, the Company’s internal actuaries perform reviews and analytical procedures on the results. The capital market inputs to the model, such as equity indexes, short-term equity volatility and interest rates, are generally observable. The valuation also requires certain significant inputs, which are generally not observable and accordingly, the valuation is considered Level 3 in the fair value hierarchy, The fair value of embedded derivatives associated with funds withheld reinsurance treaties is determined based upon a total return swap technique with reference to the fair value of the investments held by the ceding company that support the Company’s funds withheld at interest asset with an adjustment for a CVA. The fair value of the underlying assets is generally based on market observable inputs using industry standard valuation techniques. The valuation also requires certain significant inputs, which are generally not observable and accordingly, the valuation is considered Level 3 in the fair value hierarchy. Other assets elected at fair value include assets where inputs are not observable in the market and are considered Level 3 in the fair value hierarchy. Equity Securities – Equity securities consist principally of exchange-traded funds and common and preferred stock of publicly and privately traded companies. The fair values of publicly traded equity securities are primarily based on quoted market prices in active markets and are classified within Level 1 in the fair value hierarchy. Non-binding broker quotes and internally developed evaluations for equity securities are generally based on significant unobservable inputs and are reflected as Level 3 in the fair value hierarchy. Credit Valuation Adjustment – The Company uses a structural default risk model to estimate a CVA. The input assumptions are a combination of externally derived and published values (default threshold and uncertainty), market inputs (interest rate, equity price per share, debt per share, equity price volatility) and insurance industry data (Loss Given Default), adjusted for market recoverability. Cash Equivalents and Short-Term Investments – Cash equivalents and short-term investments include money market instruments and other highly liquid debt instruments. Money market instruments are generally valued using unadjusted quoted prices in active markets that are accessible for identical assets and are primarily classified as Level 1. The fair value of certain other cash equivalents and short-term investments, such as bonds with original maturities twelve months or less, are based upon other market observable data and are typically classified as Level 2. However, certain short-term investments may incorporate significant unobservable inputs resulting in a Level 3 classification. Various time deposits, certificates of deposit and sweeps carried as cash equivalents or short-term investments are not measured at estimated fair value and therefore are excluded from the tables presented. FVO Contractholder-Directed Unit-Linked Investments – FVO contractholder-directed investments supporting unit-linked variable annuity type liabilities primarily consist of exchange-traded funds and, to a lesser extent, fixed maturity securities and cash and cash equivalents. The fair values of the exchange-traded securities are primarily based on quoted market prices in active markets and are classified within Level 1 of the hierarchy. The fair value of the fixed maturity contractholder-directed securities is determined on a basis consistent with the methodologies described above for fixed maturity securities and are classified within Level 2 of the hierarchy. Derivative Assets and Derivative Liabilities – All of the derivative instruments utilized by the Company, except for longevity and mortality swaps, are classified within Level 2 on the fair value hierarchy. These derivatives are principally valued using an income approach. Valuations of interest rate contracts are based on present value techniques, which utilize significant inputs that may include the swap yield curve, London Interbank Offered Rate (“LIBOR”) basis curves, Overnight Index Swaps (“OIS”) curves, and repurchase rates. Valuations of foreign currency contracts are based on present value techniques, which utilize significant inputs that may include the swap yield curve, LIBOR basis curves, currency spot rates, and cross currency basis curves. Valuations of credit contracts, are based on present value techniques, which utilize significant inputs that may include the swap yield curve, credit curves, and recovery rates. Valuations of equity market contracts, are based on present value techniques, which utilize significant inputs that may include the swap yield curve, spot equity index levels, and dividend yield curves. Valuations of equity market contracts, option-based, are based on option pricing models, which utilize significant inputs that may include the swap yield curve, spot equity index levels, dividend yield curves, and equity volatility. Longevity and Mortality Swaps – The Company utilizes a discounted cash flow model to estimate the fair value of longevity and mortality swaps. The fair value of these swaps includes an accrual for premiums payable and receivable. Some inputs to the valuation model are generally observable, such as interest rates and actual population mortality experience. The valuation also requires significant inputs that are generally not observable and, accordingly, the valuation is considered Level 3 in the fair value hierarchy. Quantitative Information Regarding Internally-Priced Assets and Liabilities The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed internally by the Company as of December 31, 2020 and 2019 (dollars in millions): Estimated Fair Value Valuation Unobservable Range (Weighted Average) Assets: 2020 2019 Technique Input 2020 2019 Corporate $ 37 $ 1,070 Market comparable securities Liquidity premium 0-1% (1%) 0-2% (1%) EBITDA Multiple 5.2x-11.2x (7.1x) 5.2x-7.1x (6.7x) ABS 87 101 Market comparable securities Liquidity premium 1-18% (1%) 0-4% (1%) U.S. government 14 16 Market comparable Liquidity premium 0-1% (1%) 0-1% (1%) Other foreign government — 16 Market comparable Liquidity premium 0% 0-1% (1%) Equity securities 10 32 Market comparable Liquidity premium 0% 4% EBITDA Multiple 6.9x-10.6x (7.9x) 6.9x-9.3x (7.8x) Funds withheld at interest – embedded derivatives 58 121 Total return swap Mortality 0-100% (3%) 0-100% (2%) Lapse 0-35% (13%) 0-35% (13%) Withdrawal 0-5% (3%) 0-5% (3%) CVA 0-5% (1%) 0-5% (1%) Crediting rate 2-4% (2%) 2-4% (2%) Liabilities: Interest-sensitive contract liabilities – embedded derivatives – indexed annuities 752 768 Discounted cash flow Mortality 0-100% (3%) 0-100% (2%) Lapse 0-35% (13%) 0-35% (13%) Withdrawal 0-5% (3%) 0-5% (3%) Option budget 2-4% (2%) 2-4% (2%) Interest-sensitive contract liabilities – embedded derivatives – variable annuities 155 163 Discounted cash flow Mortality 0-100% (2%) 0-100%(1%) Lapse 0-25% (4%) 0-25% (5%) Withdrawal 0-7% (5%) 0-7% (5%) CVA 0-5% (1%) 0-5% (1%) Long-term volatility 0-27% (13%) 0-27% (12%) Changes in Level 3 Assets and Liabilities Assets and liabilities transferred into Level 3 are due to a lack of observable market transactions and price information. Transfers out of Level 3 are primarily the result of the Company obtaining observable pricing information or a third party pricing quotation that appropriately reflects the fair value of those assets and liabilities. The reconciliations for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows (dollars in millions): For the year ended December 31, 2020: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 2,186 $ 720 $ 208 $ 25 $ 77 $ 2 $ 121 $ — $ (930) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 2 — — — — — (4) — — Investment related gains (losses), net (22) — — — (13) — (63) — 8 Interest credited — — — — — — — — (30) Included in other comprehensive income 28 1 (7) 1 — — — — — Other revenues — — — — — — — — — Purchases (1) 1,193 — 149 — 3 17 60 — (32) Sales (1) (182) — (5) — — — — — — Settlements (1) (229) — (59) (3) — (3) — — 77 Transfers into Level 3 57 — 38 — — — — — — Transfers out of Level 3 (4) (704) (70) — (14) (1) — — — Fair value, end of period $ 3,029 $ 17 $ 254 $ 23 $ 53 $ 15 $ 114 $ — $ (907) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ — $ — $ — $ — $ — $ — $ (4) $ — $ — Investment related gains (losses), net (23) — — — (13) — (63) — (2) Other revenues — — — — — — — — — Interest credited — — — — — — — — (107) Included in other comprehensive income (34) 1 (8) 1 — — — — — For the year ended December 31, 2019: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 1,331 $ 533 $ 103 $ 28 $ 33 $ 2 $ 110 $ 48 $ (945) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 1 15 — — — — — — — Investment related gains (losses), net (11) — — — 12 — 11 — 5 Interest credited — — — — — — — — (57) Included in other comprehensive income 48 162 4 1 — (1) — (2) — Other revenues — — — — — — — 12 — Purchases (1) 1,050 10 85 — 33 30 — — (17) Sales (1) (81) — (1) — (1) (1) — — — Settlements (1) (194) — (63) (4) — (1) — (58) 84 Transfers into Level 3 43 — 86 — — — — — — Transfers out of Level 3 (1) — (6) — — (27) — — — Fair value, end of period $ 2,186 $ 720 $ 208 $ 25 $ 77 $ 2 $ 121 $ — $ (930) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ 2 $ 15 $ — $ — $ — $ — $ — $ — $ — Investment related gains (losses), net (11) — — — 12 — 11 — (3) Other revenues — — — — — — — — — Interest credited — — — — — — — — (140) For the year ended December 31, 2018: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 1,337 $ 599 $ 235 $ 64 $ — $ 3 $ 122 $ 39 $ (1,014) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses (1) 14 — — — — — — — Investment related gains (losses), net (5) — 2 — (13) — (12) — (15) Interest credited — — — — — — — — 27 Included in other comprehensive income (33) (80) (3) — — — — (2) — Other revenues — — — — — — — 9 — Purchases (1) 509 — 94 — 14 3 — — (19) Sales (1) (106) — (7) — (7) — — — — Settlements (1) (273) — (62) (5) — (1) — 2 76 Transfers into Level 3 10 — 78 10 39 — — — — Transfers out of Level 3 (107) — (234) (41) — (3) — — — Fair value, end of period $ 1,331 $ 533 $ 103 $ 28 $ 33 $ 2 $ 110 $ 48 $ (945) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ (1) $ 14 $ — $ — $ — $ — $ — $ — $ — Investment related gains (losses), net (6) — — — (16) — (12) — (22) Other revenues — — — — — — — 9 — Interest credited — — — — — — — — (49) (1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period. Nonrecurring Fair Value Measurements The following table presents information for assets measured at an estimated fair value on a nonrecurring basis during the periods presented and still held at the reporting date (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3). Carrying Value After Measurement Net Investment Gains (Losses) At December 31, Years ended December 31, (dollars in millions) 2020 2019 2020 2019 Limited partnership interests and real estate joint ventures (1) $ 20 $ 18 $ (17) $ (11) (1) Impairments on these investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. Real estate joint ventures were recognized at estimated fair value determined using historical and forecasted information for specific properties, including net operating income, occupancy, and sales levels. The market for these investments has limited activity and price transparency. Fair Value of Financial Instruments The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, as of December 31, 2020 and 2019 (dollars in millions). This table excludes any payables or receivables for collateral under repurchase agreements and other transactions. The estimated fair value of the excluded amount approximates carrying value as they equal the amount of cash collateral received/paid. Estimated Fair Fair Value Measurement Using: December 31, 2020: Carrying Value (1) Value Level 1 Level 2 Level 3 NAV Assets: Mortgage loans on real estate $ 5,787 $ 6,167 $ — $ — $ 6,167 $ — Policy loans 1,258 1,258 — 1,258 — — Funds withheld at interest 5,292 5,676 — — 5,676 — Cash and cash equivalents 1,930 1,930 1,930 — — — Short-term investments 30 30 30 — — — Other invested assets 1,482 1,601 5 89 1,018 489 Accrued investment income 511 511 — 511 — — Liabilities: Interest-sensitive contract liabilities $ 18,106 $ 19,683 $ — $ — $ 19,683 $ — Long-term debt 3,573 3,901 — — 3,901 — Collateral finance and securitization notes 388 351 — — 351 — December 31, 2019: Assets: Mortgage loans on real estate $ 5,706 $ 5,935 $ — $ — $ 5,935 $ — Policy loans 1,319 1,319 — 1,319 — — Funds withheld at interest 5,526 5,870 — — 5,870 — Cash and cash equivalents 1,175 1,175 1,175 — — — Short-term investments 32 32 32 — — — Other invested assets 1,259 1,278 5 68 803 402 Accrued investment income 493 493 — 493 — — Liabilities: Interest-sensitive contract liabilities $ 19,163 $ 21,542 $ — $ — $ 21,542 $ — Long-term debt 2,981 3,179 — — 3,179 — Collateral finance and securitization notes 598 551 — — 551 — (1) Carrying values presented herein may differ from those in the Company’s consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis. Mortgage Loans on Real Estate – The fair value of mortgage loans on real estate is estimated by discounting cash flows, both principal and interest, using current interest rates for mortgage loans with similar credit ratings and similar remaining maturities. As such, inputs include current treasury yields and spreads, which are based on the credit rating and average life of the loan, corresponding to the market spreads. The valuation of mortgage loans on real estate is considered Level 3 in the fair value hierarchy. Policy Loans – Policy loans typically carry an interest rate that is adjusted annually based on an observable market index and therefore carrying value approximates fair value. The valuation of policy loans is considered Level 2 in the fair value hierarchy. Funds Withheld at Interest – The carrying value of funds withheld at interest approximates fair value except where the funds withheld are specifically identified in the agreement. When funds withheld are specifically identified in the agreement, the fair value is based on the fair value of the underlying assets that are held by the ceding company. Ceding companies use a variety of sources and pricing methodologies, which are not transparent to the Company and may include significant unobservable inputs, to value the securities that are held in distinct portfolios, therefore the valuation of these funds withheld assets are considere

Reinsurance

Reinsurance	12 Months Ended
	Dec. 31, 2020
Reinsurance Disclosures [Abstract]
Reinsurance	REINSURANCE In the normal course of business, the Company seeks to limit its exposure to loss on any single insured and to recover a portion of benefits paid by ceding reinsurance to other insurance or reinsurance companies under excess coverage and coinsurance contracts. In the individual life markets, the Company retains a maximum of $8 million of coverage per individual life. Claims in excess of this retention amount are retroceded to retrocessionaires; however, the Company remains fully liable to the ceding company for the entire amount of risk it assumes. In certain limited situations the Company has retained more than $8 million per individual policy. The Company enters into agreements with other reinsurers to mitigate the residual risk related to the over-retained policies. Additionally, due to some lower face amount reinsurance coverage provided by the Company in addition to individual life, such as group life, disability and health, under certain circumstances, the Company could potentially incur net claims totaling more than $8 million per individual life. Retrocession reinsurance treaties do not relieve the Company from its obligations to direct writing companies. Failure of retrocessionaires to honor their obligations could result in losses to the Company. The Company regularly evaluates the financial condition of the insurance and reinsurance companies from which it assumes and to which it cedes reinsurance. Consequently, allowances would be established for amounts deemed uncollectible. At December 31, 2020 and 2019, no allowances were deemed necessary. Retrocessions are arranged through the Company’s retrocession pools for amounts in excess of the Company’s retention limit. As of December 31, 2020, all rated retrocession pool participants followed by the A.M. Best Company were rated “A- (excellent)” or better. The Company verifies retrocession pool participants’ ratings on a quarterly basis. For a majority of the retrocessionaires that were not rated, security in the form of letters of credit or trust assets has been posted. In addition, the Company performs annual financial reviews of its retrocessionaires to evaluate financial stability and performance. In addition to its third party retrocessionaires, various RGA reinsurance subsidiaries retrocede amounts in excess of their retention to affiliated subsidiaries. The following table presents information for the Company’s ceded reinsurance receivable assets, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Reinsurer A.M. Best Rating Amount % of Total Amount % of Total Reinsurer A A+ $ 420 42.7 % $ 367 40.6 % Reinsurer B A+ 216 22.0 208 23.0 Reinsurer C A 64 6.5 84 9.3 Reinsurer D A++ 55 5.6 53 5.9 Reinsurer E A+ 46 4.7 43 4.8 Other reinsurers 182 18.5 149 16.4 Total $ 983 100.0 % $ 904 100.0 % Included in the total ceded reinsurance receivables balance were $278 million and $223 million of claims recoverable, of which $10 million and $15 million were in excess of 90 days past due, as of December 31, 2020 and 2019, respectively. The effect of reinsurance on net premiums is as follows (dollars in millions): Years ended December 31, 2020 2019 2018 Direct insurance $ 58 $ 76 $ 63 Reinsurance assumed 12,583 12,150 11,341 Reinsurance ceded (947) (929) (860) Net premiums $ 11,694 $ 11,297 $ 10,544 The effect of reinsurance on claims and other policy benefits as follows (dollars in millions): Years ended December 31, 2020 2019 2018 Direct insurance $ 97 $ 113 $ 107 Reinsurance assumed 11,931 11,404 9,997 Reinsurance ceded (953) (1,320) (785) Net claims and other policy benefits $ 11,075 $ 10,197 $ 9,319 The effect of reinsurance on life insurance in force is shown in the following schedule (dollars in millions): Direct Assumed Ceded Net Assumed/Net % December 31, 2020 $ 1,990 $ 3,480,692 $ 184,625 $ 3,298,057 105.5 % December 31, 2019 1,316 3,480,206 192,864 3,288,658 105.8 December 31, 2018 1,363 3,329,181 186,172 3,144,372 105.9 At December 31, 2020 and 2019, respectively, the Company provided approximately $24.3 billion and $22.7 billion of financial reinsurance, as measured by pre-tax statutory surplus, risk based capital and other financial reinsurance structures, to other insurance companies under financial reinsurance or capital solutions transactions to assist ceding companies in meeting applicable regulatory requirements. Generally, such financial reinsurance is provided by the Company committing cash or assuming insurance liabilities, which are collateralized by future profits on the reinsured business. The Company earns a fee based on the amount of net outstanding financial reinsurance. Reinsurance treaties, whether facultative or automatic, may provide for recapture rights on the part of the ceding company. Recapture rights permit the ceding company to reassume all or a portion of the risk formerly ceded to the reinsurer after an agreed-upon period of time, generally 10 years, or in some cases due to changes in the financial condition or ratings of the reinsurer. Recapture of business previously ceded does not affect premiums ceded prior to the recapture of such business but would reduce premiums in subsequent periods. Additionally, some reinsurance treaties give the ceding company the right to require the Company to place assets in trust for their benefit to support the ceding company’s statutory reserve credits, in the event of a downgrade of the Company’s credit ratings and or other statutory measure to specified levels, generally non-investment grade levels, or if minimum levels of financial condition are not maintained. As of December 31, 2020, neither the Company nor its subsidiaries have been required to post additional collateral or have had a reinsurance treaty recaptured as a result of credit downgrade or defined statutory measure decline. Certain reinsurance treaties require the reinsurer to place assets in trust to collateralize the reinsurer’s obligation to the ceding company. Assets placed in trust continue to be owned by the Company, but their use is restricted based on the terms of the trust

Deferred Policy Acquisition Cos

Deferred Policy Acquisition Costs	12 Months Ended
	Dec. 31, 2020
Deferred Policy Acquisition Costs Disclosures [Abstract]
Deferred Policy Acquisition Costs	DEFERRED POLICY ACQUISITION COSTS The following reflects the amounts of policy acquisition costs deferred and amortized (dollars in millions): Years ended December 31, 2020 2019 2018 Balance, beginning of year $ 3,512 $ 3,398 $ 3,240 Capitalization 478 526 608 Amortization (including interest) (405) (315) (438) Change in value of embedded derivatives 22 (15) 14 Attributed to unrealized investment gains (losses) (26) (97) 27 Foreign currency translation 35 15 (53) Balance, end of year $ 3,616 $ 3,512 $ 3,398

Income Tax

Income Tax	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Tax	INCOME TAX The effective tax rate for 2020 was higher than the U.S. Statutory rate of 21% primarily as a result of income earned in jurisdictions with tax rates higher than the U.S., GILTI tax primarily due to RGA Canada's income, and a change in the corporate tax rate in the UK. These increases were partially offset by foreign tax credit utilization and bases differences in Australia. The effective tax rate for 2019 was higher than the U.S. Statutory rate of 21% primarily as a result of valuation allowance increases in various jurisdictions which were partially offset by foreign bases differences in Australia. The effective tax rate for 2018 was lower than the U.S. Statutory rate of 21% primarily as a result of U.S. Tax Reform release of a valuation allowance on foreign tax credits and foreign bases differences, which was partially offset by tax expense related to GILTI tax and valuation allowance increases. See the table below for additional information. Pre-tax income for the years ended December 31, 2020, 2019 and 2018 consists of the following (dollars in millions): 2020 2019 2018 Pre-tax income - U.S. $ 79 $ 871 $ 626 Pre-tax income - foreign 474 261 220 Total pre-tax income $ 553 $ 1,132 $ 846 The provision for income tax expense for the years ended December 31, 2020, 2019 and 2018 consists of the following (dollars in millions): 2020 2019 2018 Current income tax expense (benefit): U.S. $ 75 $ (9) $ 78 U.S. Tax Reform — — (68) Foreign 79 60 43 Total current 154 51 53 Deferred income tax expense (benefit): U.S. (60) 182 63 U.S. Tax Reform — — 6 Foreign 44 29 8 Total deferred (16) 211 77 Total provision for income taxes $ 138 $ 262 $ 130 The Company’s effective tax rate differed from the U.S. federal income tax statutory rate of 21% as a result of the following for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): 2020 2019 2018 Tax provision at U.S. statutory rate $ 116 $ 238 $ 178 Increase (decrease) in income taxes resulting from: U.S. Tax Reform — — (62) Tax rate differences on income in other jurisdictions 21 2 4 Differences in tax basis in foreign jurisdictions (32) (23) (23) Deferred tax valuation allowance 10 56 23 Amounts related to uncertain tax positions 10 8 1 Equity based compensation (1) (8) (6) Corporate rate changes 13 (1) 1 GILTI, net of credits 13 — 10 Subpart F for non-full inclusion companies — 1 1 Foreign tax credits (7) (6) (3) Return to provision adjustments (4) (6) (1) Other, net (1) 1 7 Total provision for income taxes $ 138 $ 262 $ 130 Effective tax rate 24.9 % 23.1 % 15.4 % Total income taxes for the years ended December 31, 2020, 2019 and 2018 were as follows (dollars in millions): 2020 2019 2018 Provision for income taxes $ 138 $ 262 $ 130 Income tax from OCI and additional paid-in-capital: Net unrealized holding gain (loss) on debt and equity securities recognized for financial reporting purposes 611 681 (368) Foreign currency translation (9) 3 19 Unrealized pension and post retirement (1) (5) — Total income taxes provided $ 739 $ 941 $ (219) The tax effects of temporary differences that give rise to significant portions of the deferred income tax assets and liabilities at December 31, 2020 and 2019, are presented in the following tables (dollars in millions): 2020 2019 Deferred income tax assets: Nondeductible accruals $ 92 $ 95 Net operating loss carryforward 254 330 Capital loss and tax credit carryforwards — 38 Subtotal 346 463 Valuation allowance (251) (236) Total deferred income tax assets 95 227 Deferred income tax liabilities: Deferred acquisition costs 775 675 Policy reserves and other reinsurance liabilities 1,105 1,208 Invested assets 1,043 645 Outside basis difference foreign subsidiaries 354 308 Foreign currency translation 40 52 Anticipated future tax credit reduction 20 26 Other 2 1 Total deferred income tax liabilities 3,339 2,915 Net deferred income tax liabilities $ 3,244 $ 2,688 Balance sheet presentation of net deferred income tax liabilities: Included in other assets $ 19 $ 24 Included in deferred income taxes 3,263 2,712 Net deferred income tax liabilities $ 3,244 $ 2,688 As of December 31, 2020, the valuation allowance against deferred tax assets was $251 million. During 2020, there was a $20 million increase to the valuation allowance related to the tax losses of RGA Reinsurance Company of Australia Limited ("RGA Australia"). RGA Australia's tax loss primarily relates to income on internal retrocession that is not taxable in RGA Australia. The RGA Australia deferred tax asset has been reduced to the amount more likely than not to be realized considering the projected future earnings. The valuation allowance increased further due to losses in jurisdictions that do not have a history of income and changes in foreign currency translation during the year. These increases were partially offset by a valuation allowance release related to U.S. Foreign Tax Credit utilization and income in jurisdictions with valuation allowances. As of December 31, 2019, the valuation allowance against deferred tax assets was $236 million. During 2019, there was a $44 million increase to the valuation allowance related to the tax losses of RGA Australia. RGA Australia's tax loss primarily relates to income on internal retrocession that is not taxable in RGA Australia. The RGA Australia deferred tax asset has been reduced to the amount more likely than not to be realized considering the projected future earnings. The valuation allowance also increased due to losses in jurisdictions where the company does not have a recent history of earnings, including China and Spain. These increases were partially offset by a release of a valuation allowance in New Zealand due to taxable income in recent years. The earnings of substantially all of the Company's foreign subsidiaries have been permanently reinvested in foreign operations. The Company has provided for future tax on the full inclusion companies where the Company cannot assert permanent reinvestment. At December 31, 2020 and 2019, the financial reporting basis in excess of the tax basis for which no deferred taxes have been recognized was approximately $2.7 billion and $1.6 billion, respectively. As U.S. Tax Reform generally eliminates U.S. federal income taxes on dividends from foreign subsidiaries, the Company does not expect to incur material income taxes if these funds were repatriated. During 2020, 2019, and 2018, the Company received federal and foreign income tax refunds of approximately $59 million, $22 million, and $2 million, respectively. The Company made cash income tax payments of approximately $167 million, $66 million, and $144 million, in 2020, 2019, and 2018, respectively. The following table presents consolidated net operating losses (“NOL”) as of December 31, 2020 (dollars in millions): 2020 NOL with no expiration and with no valuation allowance $ 103 NOL with a full valuation allowance 131 NOL with no expiration and a partial valuation allowance 646 NOL with expiration dates between 2033 & 2040 with no valuation allowance 20 Total net operating loss carryforwards $ 900 These net operating losses, other than the net operating losses for which there is a valuation allowance, are expected to be utilized in the normal course of business during the period allowed for carryforwards and in any event, are not expected to be lost, due to the application of tax planning strategies that management would utilize. As of December 31, 2020, the Company had foreign tax credit carryforwards of $32 million in Ireland for which there is a full valuation allowance. The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. The Company is under continuous examination by the Internal Revenue Service and is subject to audit by taxing authorities in other foreign jurisdictions in which the Company has significant business operations. The income tax years under examination vary by jurisdiction. The Company is no longer subject to U.S. federal income tax examinations by tax authorities for years prior to 2017, Canadian tax authorities for years prior to 2016 and with a few exceptions, the Company is no longer subject to state and foreign income tax examinations by tax authorities for years prior to 2015. As of December 31, 2020, the Company’s total amount of unrecognized tax benefits is $342 million and the total amount of unrecognized tax benefits that would affect the effective tax rate, if recognized, is $155 million. Management believes it is reasonably possible that the unrecognized tax benefit could decrease by up to $312 million over the next 12 months if statutes expire. A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2020, 2019 and 2018, is as follows (dollars in millions): Total Unrecognized Tax Benefits 2020 2019 2018 Beginning balance, January 1 $ 333 $ 325 $ 321 Acquisition accounting — — 1 Additions for tax positions of prior years 281 264 256 Reductions for tax positions of prior years (278) (262) (257) Additions for tax positions of current year 6 6 4 Settlements with tax authorities — — — Ending balance, December 31 $ 342 $ 333 $ 325 The Company recognized interest expense (benefit) associated with uncertain tax positions in 2020, 2019 and 2018 of $11 million, $12 million, and $(3) million, respectively. As of December 31, 2020 and 2019, the Company had $34 million and $23 million, respectively, of accrued interest related to unrecognized tax benefits. There are no penalties accrued as of December 31, 2020 or December 31, 2019.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Defined Benefit Plan	EMPLOYEE BENEFIT PLANS Certain subsidiaries of the Company are sponsors or administrators of both qualified and non-qualified defined benefit pension plans (“Pension Plans”). The largest of these plans is a non-contributory qualified defined benefit pension plan sponsored by RGA Reinsurance Company (“RGA Reinsurance”) that covers U.S. employees. The benefits under the Pension Plans are generally based on years of service and compensation levels. Effective January 1, 2020, the qualified defined benefit pension plan and some of the non-qualified defined benefit pension plans were closed to new employees. The Company also provides select health care and life insurance benefits for certain retired employees. The health care benefits are provided through a self-insured welfare benefit plan. Employees become eligible for these benefits if they meet minimum age and service requirements. The retiree’s cost for health care benefits varies depending upon the credited years of service. Effective January 1, 2017, employees hired in the U.S. are not eligible for retiree health care benefits. The effect of the amendment was recorded in 2016 in AOCI and is being amortized through prior service cost. Virtually all retirees, or their beneficiaries, contribute a portion of the total cost of postretirement health benefits. Prepaid benefit costs and accrued benefit liabilities are included in other assets and other liabilities, respectively. A December 31 measurement date is used for all of the defined benefit and postretirement plans. The status of these plans as of December 31, 2020 and 2019 is summarized below (dollars in millions): December 31, Pension Benefits Other Benefits 2020 2019 2020 2019 Change in benefit obligation: Benefit obligation at beginning of year $ 220 $ 179 $ 87 $ 67 Service cost 14 13 3 3 Interest cost 6 7 2 3 Participant contributions — — — — Actuarial (gains) losses 25 28 (9) 15 Benefits paid (12) (8) (2) (1) Foreign exchange translations and other adjustments 1 1 — — Benefit obligation at end of year $ 254 $ 220 $ 81 $ 87 December 31, Pension Benefits Other Benefits 2020 2019 2020 2019 Change in plan assets: Fair value of plan assets at beginning of year $ 133 $ 103 $ — $ — Actual return on plan assets 18 21 — — Employer contributions 18 17 2 1 Participant contributions — — — — Benefits paid and expenses (12) (8) (2) (1) Fair value of plan assets at end of year $ 157 $ 133 $ — $ — Funded status at end of year $ (97) $ (87) $ (81) $ (87) December 31, Qualified Plans Non-Qualified Plans (1) Total 2020 2019 2020 2019 2020 2019 Aggregate fair value of plan assets $ 157 $ 133 $ — $ — $ 157 $ 133 Aggregate projected benefit obligations 160 139 94 81 254 220 Under funded $ (3) $ (6) $ (94) $ (81) $ (97) $ (87) (1) For non-qualified plans, there are no required funding levels. December 31, Pension Benefits Other Benefits 2020 2019 2020 2019 Amounts recognized in accumulated other comprehensive income: Net actuarial loss $ 71 $ 59 $ 29 $ 39 Net prior service cost (credit) — — (8) (9) Total $ 71 $ 59 $ 21 $ 30 The following table presents information for qualified and non-qualified pension plans with a projected benefit obligation in excess of plan assets as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Projected benefit obligation $ 254 $ 220 Fair value of plan assets 157 133 The following table presents information for pension plans with an accumulated benefit obligation in excess of plan assets as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Accumulated benefit obligation $ 243 $ 212 Fair value of plan assets 157 133 The components of net periodic benefit cost, included in other operating expenses on the consolidated statements of income, and other changes in plan assets and benefit obligations recognized in other comprehensive income were as follows (dollars in millions): Pension Benefits Other Benefits 2020 2019 2018 2020 2019 2018 Net periodic benefit cost: Service cost $ 14 $ 13 $ 13 $ 3 $ 3 $ 3 Interest cost 6 7 5 2 3 2 Expected return on plan assets (9) (7) (8) — — — Amortization of net actuarial losses 5 4 4 2 1 2 Amortization of prior service cost (credit) — — — (1) (1) (1) Settlements — — — — — — Net periodic benefit cost 16 17 14 6 6 6 Other changes in plan assets and benefit obligations recognized in other comprehensive income: Net actuarial (gains) losses 17 14 13 (8) 14 (7) Amortization of net actuarial (losses) (5) (4) (4) (2) (1) (2) Amortization of prior service (cost) credit — — — 1 1 1 Settlements — — — — — — Foreign exchange translations and other adjustments — — — — — — Total recognized in other comprehensive income 12 10 9 (9) 14 (8) Total recognized in net periodic benefit cost and other comprehensive income $ 28 $ 27 $ 23 $ (3) $ 20 $ (2) During 2021, the Company expects to contribute $18 million and $2 million to the pension plans and other benefit plans, respectively. The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (dollars in millions): Pension Benefits Other Benefits 2021 $ 11 $ 2 2022 14 2 2023 14 2 2024 15 2 2025 16 3 2026-2030 92 18 Assumptions Weighted average assumptions used to determine the accumulated benefit obligation and net benefit cost or income were as follows: Pension Benefits Other Benefits 2020 2019 2018 2020 2019 2018 Discount rate used to determine benefit obligation 2.22 % 3.05 % 4.02 % 2.41 % 3.17 % 4.17 % Discount rate used to determine net benefit cost or income 3.03 % 4.03 % 3.41 % 3.17 % 4.17 % 3.56 % Expected long-term rate of return on plan assets 7.00 % 7.00 % 7.35 % — % — % — % Rate of compensation increases 4.69 % 4.61 % 4.17 % — % — % — % The expected rate of return on plan assets is based on anticipated performance of the various asset sectors in which the plan invests, weighted by target allocation percentages. Anticipated future performance is based on long-term historical returns of the plan assets by sector, adjusted for the long-term expectations on the performance of the markets. While the precise expected return derived using this approach may fluctuate from year to year, the policy is to hold this long-term assumption constant as long as it remains within reasonable tolerance from the derived rate. This process is consistent for all plan assets as all the assets are invested in mutual funds. The assumed health care cost trend rates used in measuring the accumulated non-pension post-retirement benefit obligation were as follows: As of December 31, 2020 2019 Health care cost trend rates assumed for next year 7.00 % 8.00 % Ultimate cost trend rate 4.50 % 4.50 % Year that the rate reaches the ultimate trend rate 2026 2026 Plan Assets Target allocations of U.S. qualified pension plan assets are determined with the objective of maximizing returns and minimizing volatility of net assets through adequate asset diversification and partial liability immunization. Adjustments are made to target allocations based on the Company’s assessment of the effect of economic factors and market conditions. The target allocations for plan assets are 60% equity securities and 40% debt securities as of December 31, 2020 and 2019. The Company’s plan assets are primarily invested in mutual funds. The mutual funds include holdings of S&P 500 securities, large-cap securities, mid-cap securities, small-cap securities, international securities, corporate debt securities, U.S. and other government securities, mortgage-related securities and cash. Equity and debt securities are exposed to various risks, such as interest rate risk, credit risk and overall market volatility. Due to the level of risk associated with certain investment securities, changes in the values of investment securities will occur and any change would affect the amounts reported in the financial statements. The fair values of the Company’s qualified pension plan assets as of December 31, 2020 and 2019 are summarized below (dollars in millions): December 31, 2020 Fair Value Measurement Using: Total Level 1 Level 2 Level 3 Mutual Funds (1) $ 157 $ 157 $ — $ — Cash — — — — Total $ 157 $ 157 $ — $ — (1) Mutual funds were invested 27% in U.S. equity funds, 39% in U.S. fixed income funds, 18% in non-U.S. equity funds and 16% in other. December 31, 2019 Fair Value Measurement Using: Total Level 1 Level 2 Level 3 Mutual Funds (2) $ 133 $ 133 $ — $ — Cash — — — — Total $ 133 $ 133 $ — $ — (2) Mutual funds were invested 27% in U.S. equity funds, 39% in U.S. fixed income funds, 18% in non-U.S. equity funds and 16% in other. As of December 31, 2020 and 2019, the Company classified all of its qualified pension plan assets in the Level 1 category as quoted prices in active markets are available for these assets. See Note 6 – “Fair Value of Asset and Liabilities” for additional detail on the fair value hierarchy. Savings and Investment Plans Certain subsidiaries of RGA also sponsor savings and investment plans under which a portion of employee contributions are matched. Subsidiary contributions to these plans were $19 million, $16 million and $15 million in 2020, 2019 and 2018, respectively.

Financial Condition and Net Inc

Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries	12 Months Ended
	Dec. 31, 2020
Statutory Basis [Abstract]
Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries	FINANCIAL CONDITION AND NET INCOME ON A STATUTORY BASIS – SIGNIFICANT SUBSIDIARIESThe domestic and foreign insurance subsidiaries of RGA prepare their statutory financial statements in conformity with statutory accounting practices prescribed or permitted by the applicable state insurance department or local regulatory authority, which may vary materially from statements prepared in accordance with GAAP. Prescribed statutory accounting practices in the U.S. include publications of the National Association of Insurance Commissioners (“NAIC”), as well as state laws, local regulations and general administrative rules. The differences between statutory financial statements and financial statements prepared in accordance with GAAP vary between jurisdictions. The principal differences between GAAP and NAIC are that statutory financial statements do not reflect deferred policy acquisition costs and limit deferred tax assets, life benefit reserves predominately use interest rate and mortality assumptions prescribed by the NAIC and local regulatory agencies, bonds are generally carried at amortized cost and reinsurance assets and liabilities are presented net of reinsurance. Statutory net income, and capital and surplus of the Company’s insurance subsidiaries, determined in accordance with statutory accounting practices prescribed by the applicable state insurance department or local regulatory authority are as follows (dollars in millions): Statutory Capital & Surplus Statutory Net Income (Loss) 2020 2019 2020 2019 2018 RGA Americas Reinsurance Company, Ltd. $ 8,249 $ 6,283 $ 879 $ 1,049 $ 209 Reinsurance Company of Missouri 2,136 2,125 4 75 (25) RGA Reinsurance (U.S.) 2,131 2,150 (133) 280 660 RGA Reinsurance Company (Barbados) Ltd. 1,835 1,553 268 234 49 RGA International Reinsurance Company dac 1,460 1,087 52 37 21 RGA Atlantic Reinsurance Company Ltd. 1,441 1,511 175 243 256 RGA Life Reinsurance Company of Canada 886 713 152 (225) (38) RGA Australia 535 447 42 15 (37) Other insurance subsidiaries 2,496 2,233 357 291 324 Each U.S. domestic insurance subsidiary’s state of domicile imposes minimum risk-based capital (“RBC”) requirements that were developed by the NAIC. The formulas for determining the amount of RBC specify various weighting factors that are applied to financial balances or various levels of activity based on the perceived degree of risk. Regulatory compliance is determined by a ratio of total adjusted capital, as defined by the NAIC, to authorized control level RBC, as defined by the NAIC. Companies below specific trigger points or ratios are classified within certain levels, each of which requires specified corrective action. Each of RGA’s U.S. domestic insurance subsidiaries exceeded the minimum RBC requirements for all periods presented herein. These requirements do not represent a significant constraint for the payment of dividends by RGA’s U.S. domestic insurance companies. The licensing orders of the Company’s special purpose companies stipulate a minimum amount of capital required based on the purpose of the entity and the underlying business. These companies are subject to enhanced oversight by the regulator which includes filing detailed plans of operations before commencing operations or making material changes to existing agreements or entering into new agreements. Each of the Company’s Special Purpose Life Reinsurance Captives (“SPLRC”) exceeded the minimum capital requirements for all periods presented herein. The Company’s foreign insurance subsidiaries prepare financial statements in accordance with local regulatory requirements. The regulatory authorities in these foreign jurisdictions establish some form of minimum regulatory capital and surplus requirements. All of the Company’s foreign insurance subsidiaries have regulatory capital and surplus that exceed the local minimum requirements. These requirements do not represent a significant constraint for the payment of dividends by the Company’s foreign insurance companies. The state of domicile of certain of the Company’s SPLRCs follow prescribed accounting practices differing from NAIC statutory accounting practices (“NAIC SAP”) applicable to their statutory financial statements. Specifically, these prescribed practices require that surplus note interest accrued but not approved for payment be reported as a direct reduction of surplus and an addition to the surplus note balance. Under NAIC SAP, surplus note interest is not to be reported until approved for payment and is reported as a reduction of net investment income in the Summary of Operations. In addition, these prescribed practices allow the SPLRC to reflect letters of credit issued for its benefit as an admitted asset and a direct credit to unassigned surplus. Under NAIC SAP, letters of credit issued on behalf of the reporting company are not reported on the balance sheet. A reconciliation of the Company’s surplus between NAIC SAP and practices prescribed by the state of domicile is shown below (dollars in millions): December 31, 2020 2019 Prescribed practice – surplus note $ 577 $ 652 Prescribed practice – letters of credit (461) (576) Surplus (deficit) – NAIC SAP $ 116 $ 76 Reinsurance Company of Missouri (“RCM”), RGA Reinsurance and Chesterfield Reinsurance Company (“Chesterfield Re”) are subject to Missouri statutory provisions that restrict the payment of dividends. They may not pay dividends in any 12-month period in excess of the greater of the prior year’s statutory net gain from operations or 10% of statutory capital and surplus at the preceding year-end, without regulatory approval. Aurora National Life Assurance Company (“Aurora National”) is subject to California statutory provisions that are identical to those imposed by Missouri regarding the ability of Aurora National to pay dividends to RGA Reinsurance. The applicable statutory provisions only permit an insurer to pay a shareholder dividend from unassigned surplus. As of January 1, 2020, RGA Reinsurance could pay maximum dividends, without prior approval, of approximately $213 million. Any dividends paid by RGA Reinsurance would be paid to RCM, its parent company, which in turn has restrictions related to its ability to pay dividends to RGA. Chesterfield Re would pay dividends to its immediate parent Chesterfield Financial Holdings LLC, (“Chesterfield Financial”), which would in turn pay dividends to RCM, subject to the terms of the indenture for the embedded value securitization transaction, in which Chesterfield Financial cannot declare or pay any dividends so long as any private placement notes are outstanding. The Missouri Department of Commerce and Insurance allows RCM to pay a dividend to RGA to the extent RCM received the dividend from its subsidiaries, without limitation related to the level of unassigned surplus. Dividend payments from other subsidiaries are subject to regulations in the jurisdiction of domicile, which are generally based on their earnings and/or capital level. Dividend payments from non-U.S. operations are subject to similar restrictions established by local regulators. The non-U.S. regulatory regimes also commonly limit the dividend payments to the parent to a portion of the prior year’s statutory income, as determined by the local accounting principles. The regulators of the Company’s non-U.S. operations may also limit or prohibit profit repatriations or other transfers of funds to the U.S. if such transfers are deemed to be detrimental to the solvency or financial strength of the non-U.S. operations, or for other reasons. Most of the non-U.S. operating subsidiaries are second tier subsidiaries that are owned by various non-U.S. holding companies. The capital and rating considerations applicable to the first tier subsidiaries may also impact the dividend flow to RGA. There are no regulatory restrictions that limit the payment of dividends by RGA, except those generally applicable to Missouri corporations. Dividends are payable by Missouri corporations only under the circumstances specified in The General and Business Corporation Law of Missouri. RGA would not be permitted to pay common stock dividends if there is any accrued and unpaid interest on its subordinated debentures and its junior subordinated debentures. Furthermore, the ability of RGA to pay dividends is dependent on business conditions, income, cash requirements of the Company, receipt of dividends from its subsidiaries, financial covenant provisions and other relevant factors.

Commitments Contingencies and G

Commitments Contingencies and Guarantees	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	COMMITMENTS, CONTINGENCIES AND GUARANTEES Commitments Funding of Investments The Company’s commitments to fund investments as of December 31, 2020 and 2019 are presented in the following table (dollars in millions): 2020 2019 Limited partnership interests and joint ventures $ 678 $ 685 Mortgage loans on real estate 199 243 Bank loans and private placements 194 181 Lifetime mortgages 43 87 The Company anticipates that the majority of its current commitments will be invested over the next five years; however, these commitments could become due any time at the request of the counterparties. Bank loans and private placements are included in fixed maturity securities available-for-sale. The Company has a liability for expected credit losses associated with unfunded commitments of approximately $2 million as of December 31, 2020, which is included in other liabilities on the Company’s consolidated balance sheets. Off-Balance Sheet Arrangements In 2013, the Company executed a series of incentive agreements with the County of St. Louis, Missouri (the “County”). Under these agreements, the Company transferred ownership in its newly constructed world headquarters to the County in exchange for taxable industrial revenue bonds (the “bonds”), in a series of bond issuances during 2013 and 2014, with a maximum amount of $150 million. As a result, the Company was able to reduce the cost of constructing and operating its world headquarters by reducing certain state and local tax expenditures. The Company simultaneously leased the world headquarters from the County and has an option to purchase the world headquarters for a nominal fee upon tendering the bonds back to the County. The payments due to the Company under the terms of the bonds and the amounts owed by the Company under the terms of the lease agreement qualify for the right of offset under GAAP. As such, neither the bonds nor the lease obligation is recorded on the consolidated balance sheets as an asset or liability, respectively. The world headquarters is recorded as an asset of the Company in “Other assets” on the consolidated balance sheets. Contingencies Litigation The Company is subject to litigation in the normal course of its business; however, the Company currently has no material litigation. A legal reserve is established when the Company is notified of an arbitration demand or litigation or is notified that an arbitration demand or litigation is imminent, it is probable that the Company will incur a loss as a result and the amount of the probable loss is reasonably capable of being estimated. Other Contingencies The Company indemnifies its directors and officers as provided in its charters and by-laws. Since this indemnity generally is not subject to limitation with respect to duration or amount, the Company does not believe that it is possible to determine the maximum potential amount due under this indemnity in the future. Guarantees Statutory Reserve and Solvency Support The Company has committed to provide statutory reserve support to third-parties, in exchange for a fee, by funding loans if certain defined events occur. Such statutory reserves are required under the U.S. Valuation of Life Policies Model Regulation (commonly referred to as Regulation XXX for term life insurance policies and Regulation A-XXX for universal life secondary guarantees). In addition, RGA has also committed to provide capital support to a third-party, in exchange for a fee, by agreeing to assume real estate leases in the event of a severe and prolonged decline in the commercial lease market. Upon assumption of a lease, RGA would recognize a right to use asset and lease obligation. As of December 31, 2020, the Company does not believe that it will be required to provide any funding under these commitments as the occurrence of the defined events is considered remote. The following table presents the maximum potential obligation for these commitments as of December 31, 2020 (dollars in millions): Commitment Period Maximum Potential Obligation 2034 $ 1,243 2035 2,666 2036 3,599 2037 2,850 2038 2,300 2039 11,350 Other Guarantees RGA has issued guarantees to third parties on behalf of its subsidiaries for the payment of amounts due under certain reinsurance treaties, securities borrowing and repurchase arrangements, financing arrangements and office lease obligations, whereby if a subsidiary fails to meet an obligation, RGA or one of its other subsidiaries will make a payment to fulfill the obligation. In limited circumstances, treaty guarantees are granted to ceding companies in order to provide them additional security, particularly in cases where RGA’s subsidiary is relatively new, unrated, or not of a significant size, relative to the ceding company. Liabilities supported by the treaty guarantees, before consideration for any legally offsetting amounts due from the guaranteed party are reflected on the Company’s consolidated balance sheets in a policy related liability. Potential guaranteed amounts of future payments will vary depending on production levels and underwriting results. Guarantees related to securities borrowing and repurchase arrangements provide additional security to third parties should a subsidiary fail to provide securities when due. RGA’s guarantees issued as of December 31, 2020 and 2019 are reflected in the following table (dollars in millions): 2020 2019 Treaty guarantees $ 1,934 $ 1,821 Treaty guarantees, net of assets in trust 961 891 Securities borrowing and repurchase arrangements 133 275 Financing arrangements — 42

Debt

Debt	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Debt	DEBT Long-Term Debt The Company’s long-term debt consists of the following as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 $400 million 5.00% Senior Notes due 2021 $ 400 $ 400 $400 million 4.70% Senior Notes due 2023 399 399 $400 million 3.95% Senior Notes due 2026 400 400 $600 million 3.90% Senior Notes due 2029 599 599 $600 million 3.15% Senior Notes due 2030 597 — $100 million 4.09% Promissory Note due 2039 83 86 $400 million 6.20% Subordinated Debentures due 2042 400 400 $400 million 5.75% Subordinated Debentures due 2056 400 400 $400 million Variable Rate Junior Subordinated Debentures due 2065 319 319 Sub-total 3,597 3,003 Unamortized issuance costs (24) (22) Long-term Debt $ 3,573 $ 2,981 RGA has entered into an interest rate swap on its Variable Rate Junior Subordinated Debentures that effectively fixes the interest rate on these securities at 4.82% until December 2037. On June 9, 2020, RGA issued 3.15% Senior Notes due June 15, 2030, with a face amount of $600 million. This security has been registered with the Securities and Exchange Commission. The net proceeds were approximately $593 million and will be used in part to repay the Company’s $400 million 5.00% Senior Notes due in 2021, and the remainder will be used for general corporate purposes. Capitalized issue costs were approximately $5 million. On May 15, 2019, RGA issued 3.9% Senior Notes due May 15, 2029 with a face amount of $600 million. This security has been registered with the Securities and Exchange Commission. The net proceeds were approximately $594 million and was used in part to repay upon maturity the Company’s $400 million 6.45% Senior Notes that matured in November 2019. The remainder will be used for general corporate purposes. Capitalized issue costs were approximately $5 million. Certain of the Company’s debt agreements contain financial covenant restrictions related to, among others, liens, the issuance and disposition of stock of restricted subsidiaries, minimum requirements of consolidated net worth, maximum ratios of debt to capitalization and change of control provisions. A material ongoing covenant default could require immediate payment of the amount due, including principal, under the various agreements. Additionally, the Company’s debt agreements contain cross-default covenants, which would make outstanding borrowings immediately payable in the event of a material uncured covenant default under any of the agreements, including, but not limited to, non-payment of indebtedness when due for an amount in excess of the amounts set forth in those agreements, bankruptcy proceedings, or any other event that results in the acceleration of the maturity of indebtedness. As of December 31, 2020 and 2019, the Company had $3,597 million and $3,003 million, respectively, in outstanding borrowings under its debt agreements and was in compliance with all covenants under those agreements. As of December 31, 2020 and 2019, the average interest rate on long-term debt outstanding was 4.54% and 4.82%, respectively. The ability of the Company to make debt principal and interest payments depends on the earnings and surplus of subsidiaries, investment earnings on undeployed capital proceeds, and the Company’s ability to raise additional funds. Future principal payments due on long-term debt, excluding discounts, as of December 31, 2020, were as follows (dollars in millions): Calendar Year 2021 2022 2023 2024 2025 Thereafter Long-term debt $ 403 $ 3 $ 403 $ 3 $ 4 $ 2,787 Credit and Committed Facilities The Company has obtained bank letters of credit in favor of various affiliated and unaffiliated insurance companies from which the Company assumes business. These letters of credit represent guarantees of performance under the reinsurance agreements and allow ceding companies to take statutory reserve credits. Certain of these letters of credit contain financial covenant restrictions. At December 31, 2020 and 2019, there were approximately $23 million and $62 million, respectively, of undrawn outstanding bank letters of credit in favor of third parties. Additionally, the Company utilizes letters of credit primarily to secure reserve credits when it retrocedes business to its affiliated subsidiaries. The Company cedes business to its affiliates to help reduce the amount of regulatory capital required in certain jurisdictions such as the U.S. and the United Kingdom. As of December 31, 2020 and 2019, $1,508 million and $1,224 million, respectively, in undrawn letters of credit from various banks were outstanding, primarily backing reinsurance between the various subsidiaries of the Company. The banks providing letters of credit to the Company are included on the NAIC list of approved banks. The Company maintains eight committed credit facilities, a syndicated revolving credit facility and seven letter of credit facilities. The committed credit facilities have a combined capacity of $1,132 million while the syndicated revolving credit facility is for $850 million and the remaining credit facilities have a capacity of $932 million. The Company may borrow cash and obtain letters of credit in multiple currencies under its syndicated revolving credit facility. The following table provides additional information on the Company’s existing committed credit facilities as of December 31, 2020 and 2019 (dollars in millions): Amount Utilized (1) December 31, Current Capacity Maturity Date 2020 2019 Basis of Fees $ 75 June 2021 $ 51 $ 15 Fixed 100 August 2021 100 — Fixed 150 September 2021 150 — Fixed 107 March 2022 107 99 Fixed 500 May 2022 210 375 Debt rating and utilization % 100 (2) December 2022 100 105 Fixed 100 May 2023 75 61 Fixed 850 August 2023 21 20 Senior unsecured long-term debt rating (1) Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented. (2) Foreign currency denominated facility, amounts presented are in U.S. dollars. Fees associated with the Company’s other letters of credit are not fixed for periods in excess of one year and are based on the Company’s ratings and the general availability of these instruments in the marketplace. Total fees expensed associated with the Company’s letters of credit were $10 million, $8 million and $10 million for the years ended December 31, 2020, 2019 and 2018, respectively, and are included in policy acquisition costs and other insurance expenses.

Collateral Finance and Securiti

Collateral Finance and Securitization Notes	12 Months Ended
	Dec. 31, 2020
Collateralized Financings [Abstract]
Collateral Finance and Securitization Notes	COLLATERAL FINANCE AND SECURITIZATION NOTES Collateral Finance Notes In 2006, RGA’s subsidiary, Timberlake Financial L.L.C. (“Timberlake Financial”), issued $850 million of Series A Floating Rate Insured Notes, due June 2036, in a private placement. The notes were issued to fund the collateral requirements for statutory reserves required by Regulation XXX on specified term life insurance policies reinsured by RGA Reinsurance and retroceded to Timberlake Re. Proceeds from the notes, along with a $113 million direct investment by RGA, were deposited into a series of accounts that collateralize the notes and are not available to satisfy the general obligations of the Company. As of December 31, 2020 and 2019, respectively, the Company held assets in trust and in custody of $572 million and $694 million, of which $40 million and $58 million were held in a Debt Service Coverage account to cover interest payments on the notes. Interest on the notes accrues at an annual rate of 1-month LIBOR plus a base rate margin, payable monthly, and totaled $3 million, $9 million and $9 million in 2020, 2019 and 2018, respectively. In 2015, RGA’s subsidiary, RGA Reinsurance Company (Barbados) Ltd. (“RGA Barbados”) obtained CAD$200.0 million of collateral financing from a third party that matured in May 2020, enabling RGA Barbados to support collateral requirements for Canadian reinsurance transactions. The obligation is reflected on the consolidated balance sheets in collateral finance and securitization notes. Interest on the collateral financing is payable quarterly and accrues at 3-month Canadian Dealer Offered Rate plus a margin and totaled $2 million, $5 million and $5 million in 2020, 2019 and 2018, respectively. In 2015, RGA’s subsidiary, RGA Americas Reinsurance Company, Ltd. (“RGA Americas”), entered into a collateral financing transaction pursuant to which it issued a CAD$150 million note and, in return, obtained a CAD$150 million demand note issued by a designated series of a Delaware master trusts. The demand note matured in October 2020 and was used to support collateral requirements for Canadian reinsurance transactions. Securitization Notes In 2014, RGA’s subsidiary, Chesterfield Financial Holdings LLC, (“Chesterfield Financial”), issued $300 million of asset-backed notes due December 2024 in a private placement. The notes were issued as part of an embedded value securitization transaction covering a closed block of policies assumed by RGA Reinsurance and retroceded to Chesterfield Re. Proceeds from the notes, along with a direct investment by the Company, were applied by Chesterfield Financial to (i) pay certain transaction-related expenses, (ii) establish a reserve account owned by Chesterfield Financial and pledged to the indenture trustee for the benefit of the holders of the notes (primarily to cover interest payments on the notes), and (iii) to fund an initial stock purchase from and capital contribution to Chesterfield Re to capitalize Chesterfield Re and to finance the payment of a ceding commission by Chesterfield Re to RGA Reinsurance under the retrocession agreement. As of December 31, 2020 and 2019, the Company held deposits in trust of $10 million and $15 million, respectively, to cover interest payments on the notes, which are not available to satisfy the general obligations of the Company. Interest on the notes accrues at an annual rate of 4.50%, payable quarterly, and totaled $7 million, $8 million and $10 million in 2020, 2019 and 2018, respectively. The notes represent senior, secured indebtedness of Chesterfield Financial. Limited support is provided by RGA for temporary potential liquidity events at Chesterfield Financial and for temporary potential statutory capital and surplus events at Chesterfield Re. Otherwise, there is no legal recourse to RGA or its other subsidiaries. The notes are not insured or guaranteed by any other person or entity. The Company’s collateral finance and securitization notes consist of the following as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Timberlake Financial $ 247 $ 313 RGA Barbados — 127 Chesterfield Financial 143 161 Unamortized issuance costs (2) (3) Total $ 388 $ 598

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION The Company has geographic-based and business-based operational segments. Geographic-based operations are further segmented into traditional and financial solutions businesses. The U.S. and Latin America Traditional segment provides individual and group life and health reinsurance to domestic clients for a variety of products through yearly renewable term agreements, coinsurance, and modified coinsurance. The U.S. and Latin America Financial Solutions segment includes asset-intensive products that concentrate on the investment risk within underlying annuities and corporate-owned life insurance policies, financial reinsurance, and capital solutions that assists ceding companies in meeting applicable regulatory requirements while enhancing their financial strength and regulatory surplus position. The Canada Traditional segment is primarily engaged in individual life reinsurance, and to a lesser extent creditor, group life and health, critical illness and disability reinsurance, through yearly renewable term and coinsurance agreements. The Canada Financial Solutions segment concentrates on assisting clients with longevity risk transfer structures within underlying annuities and pension benefit obligations, and provides capital solutions to assist clients in meeting applicable regulatory requirements while enhancing their financial strength and regulatory surplus position through financial reinsurance and other capital solutions structures. The Europe, Middle East and Africa Traditional segment provides individual and group life and health products through yearly renewable term and coinsurance agreements, reinsurance of critical illness coverage that provides a benefit in the event of the diagnosis of a pre-defined critical illness and underwritten annuities. The Europe, Middle East and Africa Financial Solutions segment provides longevity, asset-intensive and financial reinsurance. Longevity reinsurance takes the form of closed block annuity reinsurance and longevity swap structures. The Asia Pacific Traditional segment provides individual and group life and health reinsurance, critical illness coverage, disability and superannuation through yearly renewable term and coinsurance agreements. The Asia Pacific Financial Solutions segment provides financial reinsurance, asset-intensive and certain disability and life blocks. Corporate and Other revenues primarily include investment income from unallocated invested assets, investment related gains and losses and service fees. Corporate and Other expenses consist of the offset to capital charges allocated to the operating segments within the policy acquisition costs and other insurance income line item, unallocated overhead and executive costs, interest expense related to debt, and the investment income and expense associated with the Company’s collateral finance and securitization transactions and service business expenses. Additionally, Corporate and Other includes results from certain wholly-owned subsidiaries, such as RGAx, and joint ventures that, among other activities, develop and market technology, and provide consulting and outsourcing solutions for the insurance and reinsurance industries. The Company has increased its investment and expenditures in this area in an effort to both support its clients and accelerate the development of new solutions and services to increase consumer engagement within the life industry. The accounting policies of the segments are the same as those described in Note 2 – “Significant Accounting Policies and Pronouncements.” The Company measures segment performance primarily based on profit or loss from operations before income taxes. There are no intersegment reinsurance transactions and the Company does not have any material long-lived assets. The Company allocates capital to its segments based on an internally developed economic capital model, the purpose of which is to measure the risk in the business and to provide a basis upon which capital is deployed. The economic capital model considers the unique and specific nature of the risks inherent in the Company’s businesses. As a result of the economic capital allocation process, a portion of investment income is attributed to the segments based on the level of allocated capital. In addition, the segments are charged for excess capital utilized above the allocated economic capital basis. This charge is included in policy acquisition costs and other insurance expenses. Information related to revenues, income (loss) before income taxes, interest expense, depreciation and amortization, and assets of the Company’s operations are summarized below (dollars in millions): For the years ended December 31, 2020 2019 2018 Revenues: U.S. and Latin America: Traditional $ 6,560 $ 6,500 $ 6,296 Financial Solutions 1,220 1,279 907 Total 7,780 7,779 7,203 Canada: Traditional 1,260 1,286 1,224 Financial Solutions 92 99 49 Total 1,352 1,385 1,273 Europe, Middle East and Africa: Traditional 1,633 1,520 1,495 Financial Solutions 471 450 350 Total 2,104 1,970 1,845 Asia Pacific: Traditional 2,806 2,681 2,417 Financial Solutions 309 228 54 Total 3,115 2,909 2,471 Corporate and Other 245 257 84 Total $ 14,596 $ 14,300 $ 12,876 For the years ended December 31, 2020 2019 2018 Income (loss) before income taxes: U.S. and Latin America: Traditional $ (298) $ 265 $ 286 Financial Solutions 295 398 251 Total (3) 663 537 Canada: Traditional 134 168 112 Financial Solutions 21 15 10 Total 155 183 122 Europe, Middle East and Africa: Traditional 27 80 55 Financial Solutions 258 223 197 Total 285 303 252 Asia Pacific: Traditional 174 105 178 Financial Solutions 59 23 (6) Total 233 128 172 Corporate and Other (117) (145) (237) Total $ 553 $ 1,132 $ 846 For the years ended December 31, 2020 2019 2018 Interest expense: Corporate and Other $ 170 $ 173 $ 147 Total $ 170 $ 173 $ 147 For the years ended December 31, 2020 2019 2018 Depreciation and amortization: U.S. and Latin America: Traditional $ 291 $ 291 $ 273 Financial Solutions 90 143 95 Total 381 434 368 Canada: Traditional 24 20 22 Financial Solutions — — — Total 24 20 22 Europe, Middle East and Africa: Traditional 46 56 45 Financial Solutions 1 1 — Total 47 57 45 Asia Pacific: Traditional 94 60 115 Financial Solutions 20 16 2 Total 114 76 117 Corporate and Other 23 22 22 Total $ 589 $ 609 $ 574 The table above includes amortization of DAC, including the effect from investment related gains and losses. For the years ended December 31, 2020 2019 Assets: U.S. and Latin America: Traditional $ 20,071 $ 19,353 Financial Solutions 25,433 25,117 Total 45,504 44,470 Canada: Traditional 4,682 4,361 Financial Solutions 13 64 Total 4,695 4,425 Europe, Middle East and Africa: Traditional 4,763 4,032 Financial Solutions 7,292 6,502 Total 12,055 10,534 Asia Pacific: Traditional 8,197 6,800 Financial Solutions 4,299 2,557 Total 12,496 9,357 Corporate and Other 9,906 7,945 Total $ 84,656 $ 76,731 Companies in which the Company has significant influence over the operating and financing decisions but are not required to be consolidated, are reported on the equity basis of accounting. The equity in the net income of such investments is not material to the results of operations or financial position of individual segments or the Company taken as a whole. Capital expenditures of each reporting segment were immaterial in the periods noted.

Policy Claims and Benefits

Policy Claims and Benefits	12 Months Ended
	Dec. 31, 2020
Insurance [Abstract]
Short-Duration Insurance and Deposit Contracts [Text Block]	Liabilities for Unpaid Claims and Claim Expense The Company uses several actuarial methods to compute incurred-but-not reported liabilities. These methods use historical claim reporting patterns to develop a triangle of reported claim amounts. The claim triangle is then used to develop the ultimate claims amount and the incurred-but-not reported liabilities. Expected claim methods use exposure data such as premiums to develop the ultimate claim amount. The final method blends the estimates from the development and the expected claim methods. There were no significant changes in methodologies during 2020. The following tables provide information on incurred and paid claims development, net of retrocession, for short-duration reinsurance contracts for the Company’s U.S. and Latin America and Asia Pacific Traditional segments, which primarily relate to group life and health (including disability) business. The short-duration business for the Company’s other segments is immaterial. Liabilities for claims and claims adjustment expenses, net of reinsurance equals total incurred claims less cumulative paid claims plus outstanding liabilities prior to 2012. The Company provides reinsurance on large quota share transactions. It is common industry practice for cedants to provide loss information on a bulk basis without comprehensive claim details. Additionally, a claim under aggregate stop loss coverage may be the result of thousands of claims, but the Company only pays the excess amount. Therefore, it is impractical to provide meaningful claim count detail by accident year in the tables shown below. U.S. and Latin America As of (dollars in millions) December 31, 2020 Incurred Claims and Allocated Claim Adjustments, Net of Reinsurance (1) Total of Incurred-but-Not-Reported Liabilities Plus Expected Development on Reported Claims Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 323 $ 309 $ 297 $ 298 $ 299 $ 298 $ 297 $ 297 $ 296 $ — 2013 349 333 339 337 336 336 337 335 — 2014 408 411 396 397 396 399 399 — 2015 460 461 465 462 462 463 — 2016 501 500 501 497 497 — 2017 485 514 509 504 3 2018 538 538 524 8 2019 491 473 30 2020 469 197 Total $ 3,960 Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance (1) Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 109 $ 222 $ 244 $ 252 $ 258 $ 264 $ 268 $ 272 $ 275 2013 114 249 277 286 292 297 302 305 2014 129 305 337 349 356 364 368 2015 146 361 407 422 431 437 2016 185 393 437 451 460 2017 190 403 448 462 2018 183 415 465 2019 180 372 2020 159 Total $ 3,303 All outstanding claims prior to 2012, net of reinsurance 131 Liabilities for claims and claim adjustment expense, net of reinsurance $ 788 (1) 2012-2019 Unaudited. Asia Pacific As of (dollars in millions) December 31, 2020 Incurred Claims and Allocated Claim Adjustments, Net of Reinsurance (1) Total of Incurred-but-Not-Reported Liabilities Plus Expected Development on Reported Claims Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 227 $ 305 $ 309 $ 313 $ 321 $ 332 $ 338 $ 343 $ 345 $ 5 2013 320 342 332 329 343 358 361 359 7 2014 302 328 290 296 310 312 313 9 2015 304 281 273 292 291 292 14 2016 248 225 232 240 240 15 2017 232 234 234 237 21 2018 277 295 290 50 2019 277 286 82 2020 163 84 Total $ 2,525 Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance (1) Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 54 $ 148 $ 202 $ 243 $ 266 $ 284 $ 300 $ 310 $ 318 2013 54 157 229 258 285 309 322 332 2014 38 148 194 225 250 265 276 2015 53 129 183 221 242 255 2016 42 107 145 167 182 2017 39 95 126 149 2018 35 116 160 2019 42 111 2020 26 Total $ 1,809 All outstanding claims prior to 2012, net of reinsurance 90 Liabilities for claims and claim adjustment expense, net of reinsurance $ 806 (1) 2012-2019 Unaudited. The following is unaudited supplementary information about average historical claims duration as of December 31, 2020: Average Annual Payout of Incurred Claims by Age, Net of Reinsurance Years 1 2 3 4 5 6 7 8 9 U.S. and Latin America 35.2 % 42.2 % 8.8 % 2.9 % 1.9 % 1.6 % 1.3 % 1.2 % 1.2 % Asia Pacific 15.2 % 27.6 % 16.1 % 10.3 % 7.2 % 5.3 % 4.0 % 2.8 % 2.4 % Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid Claims and Claims Adjustment Expenses The reconciliation of the net incurred and paid claims development tables to the liability for claims and claim adjustment expense in the consolidated balance sheet as of December 31, 2020, is as follows (dollars in millions): 2020 Liabilities for claims and claim adjustment expense, net of reinsurance: U.S. and Latin America $ 788 Asia Pacific 806 Liabilities for claims and claim adjustment expense, net of reinsurance 1,594 Adjustments to reconcile to total policy claims and future policy benefits: Reinsurance recoverable 12 Effect of discounting (120) Unallocated claims adjustment expense 7 Total adjustments (101) Other short-duration contracts: Canada 90 Europe, Middle East and Africa 587 Other 277 Liability for unpaid claims and claim adjustment expense – short-duration 2,447 Liability for unpaid claims and claim adjustment expense – long-duration 5,109 Total liability for unpaid claims and claim adjustment expense (included in future policy benefits and other policy-related balances) $ 7,556 Rollforward of Claims and Claim Adjustment Expenses The liability for unpaid claims is reported in future policy benefits and other policy-related balances within the Company’s consolidated balance sheets. Activity associated with unpaid claims is summarized below (dollars in millions): 2020 2019 2018 Balance at beginning of year $ 6,786 $ 6,585 $ 5,896 Less: reinsurance recoverable (564) (433) (456) Net balance at beginning of year 6,222 6,152 5,440 Incurred: Current year 11,195 10,307 10,049 Prior years 123 154 131 Total incurred 11,318 10,461 10,180 Payments: Current year (5,617) (5,140) (4,602) Prior years (5,204) (5,305) (4,692) Total payments (10,821) (10,445) (9,294) Other changes: Interest accretion 36 33 25 Foreign exchange adjustments 160 21 (199) Total other changes 196 54 (174) Net balance at end of year 6,915 6,222 6,152 Plus: reinsurance recoverable 641 564 433 Balance at end of year $ 7,556 $ 6,786 $ 6,585 Incurred claims associated with prior periods are primarily due to events, related to long-duration business, which were incurred in prior periods but were reported in the current period, and to a lesser extent, the development of short-duration business claims for prior years being different than were anticipated when the liabilities for unpaid claims were originally estimated. These trends have been considered in establishing the current year liability for unpaid claims.

Equity

Equity	12 Months Ended
	Dec. 31, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Comprehensive Income	EQUITY On June 5, 2020, the Company completed a public offering of 6,172,840 shares of common stock, $0.01 par value per share, at a public offering price of $81.00 per share. The Company received net proceeds of approximately $481 million. The Company granted the underwriters an option to purchase from the Company, within 30 days after the Underwriting Agreement dated June 2, 2020, up to an additional 925,926 shares of common stock at the offering price of $81.00 per share. The underwriters’ option was not exercised and expired on July 2, 2020. The Company anticipates using the net proceeds of the offering for general corporate purposes. Common Stock The changes in number of common stock shares, issued, held in treasury and outstanding are as follows for the periods indicated: Issued Held In Treasury Outstanding Balance, December 31, 2017 79,137,758 14,685,663 64,452,095 Common Stock acquired — 1,932,055 (1,932,055) Stock-based compensation (1) — (294,328) 294,328 Balance, December 31, 2018 79,137,758 16,323,390 62,814,368 Common Stock acquired — 546,614 (546,614) Stock-based compensation (1) — (388,348) 388,348 Balance, December 31, 2019 79,137,758 16,481,656 62,656,102 Equity offering 6,172,840 — 6,172,840 Common Stock acquired — 1,074,413 (1,074,413) Stock-based compensation (1) — (202,372) 202,372 Balance, December 31, 2020 85,310,598 17,353,697 67,956,901 (1) Represents net shares issued from treasury pursuant to the Company’s stock-based compensation programs. Common Stock Held in Treasury Common stock held in treasury is accounted for at average cost. Gains resulting from the reissuance of “Common stock held in treasury” are credited to “Additional paid-in capital.” Losses resulting from the reissuance of “Common stock held in treasury” are charged first to “Additional paid-in capital” to the extent the Company has previously recorded gains on treasury share transactions, then to “Retained earnings.” On January 24, 2019, RGA’s board of directors authorized a share repurchase program for up to $400 million of RGA’s outstanding common stock. The authorization was effective immediately and does not have an expiration date. In connection with this authorization, the board of directors terminated the stock repurchase authority granted in 2017. On May 6, 2020, the Company announced that it has suspended stock repurchases until further notice. The resumption and pace of repurchase activity depends on various factors such as the level of available cash, the impact of the ongoing COVID-19 pandemic, an evaluation of the costs and benefits associated with alternative uses of excess capital, such as acquisitions and in force reinsurance transactions, and RGA’s stock price. The following table summarizes the Company’s current share repurchase program activity for the year ended 2020 (dollar amounts in millions, except for the number of shares and per share amounts): Year of Repurchase Shares Repurchased Amount Paid Average Per Share 2020 1,074,413 $ 153 $ 142.05 2019 546,614 $ 80 $ 146.00 Accumulated Other Comprehensive Income (Loss) The following table presents the components of the Company’s other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): For the year ended December 31, 2020: Before-Tax Amount Tax (Expense) Benefit After-Tax Amount Foreign currency translation adjustments: Change arising during year $ 43 $ 3 $ 46 Foreign currency swap (29) 6 (23) Net foreign currency translation adjustments 14 9 23 Unrealized gains on investments: (1) Unrealized net holding gains arising during the year 2,812 (614) 2,198 Less: Reclassification adjustment for net gains realized in net income (8) (1) (9) Net unrealized gains 2,820 (613) 2,207 Change in impairments on fixed maturity securities (8) 2 (6) Unrealized pension and postretirement benefits: Net prior service cost arising during the year (1) — (1) Net gain (loss) arising during the period (2) 1 (1) Unrealized pension and postretirement benefits, net (3) 1 (2) Other comprehensive income (loss) $ 2,823 $ (601) $ 2,222 For the year ended December 31, 2019: Before-Tax Amount Tax (Expense) Benefit After-Tax Amount Foreign currency translation adjustments: Change arising during year $ 113 $ (10) $ 103 Foreign currency swap (33) 7 (26) Net foreign currency translation adjustments 80 (3) 77 Unrealized gains on investments: (1) Unrealized net holding gains arising during the year 3,208 (698) 2,510 Less: Reclassification adjustment for net gains realized in net income 84 (17) 67 Net unrealized gains 3,124 (681) 2,443 Change in impairments on fixed maturity securities — — — Unrealized pension and postretirement benefits: Net prior service cost arising during the year (1) — (1) Net gain arising during the period (23) 5 (18) Unrealized pension and postretirement benefits, net (24) 5 (19) Other comprehensive income (loss) $ 3,180 $ (679) $ 2,501 For the year ended December 31, 2018: Before-Tax Amount Tax (Expense) Benefit After-Tax Amount Foreign currency translation adjustments: Change arising during year $ (148) $ (1) $ (149) Foreign currency swap 87 (18) 69 Net foreign currency translation adjustments (61) (19) (80) Unrealized gains on investments: (1) Unrealized net holding gains arising during the year (1,834) 394 (1,440) Less: Reclassification adjustment for net gains realized in net income (122) 26 (96) Net unrealized gains (1,712) 368 (1,344) Change in impairments on fixed maturity securities — — — Unrealized pension and postretirement benefits: Net prior service cost arising during the year (1) — (1) Net gain arising during the period 1 — 1 Unrealized pension and postretirement benefits, net — — — Other comprehensive income (loss) $ (1,773) $ 349 $ (1,424) (1) Includes cash flow hedges. See Note 5 for additional information on cash flow hedges. A summary of the components of net unrealized appreciation (depreciation) of balances carried at fair value is as follows (dollars in millions): For the years ended December 31, 2020 2019 2018 Change in net unrealized appreciation (depreciation) on: Fixed maturity securities available-for-sale $ 2,837 $ 3,258 $ (1,759) Other investments (1) 29 (37) 20 Effect on unrealized appreciation on: Deferred policy acquisition costs (54) (98) 27 Net unrealized appreciation (depreciation) $ 2,812 $ 3,123 $ (1,712) (1) Includes cash flow hedges. See Note 5 for additional information on cash flow hedges. The balance of and changes in each component of AOCI were as follows (dollars in millions): Accumulated Unrealized Appreciation (Depreciation) of Investments (1) Pension and Accumulated Balance, December 31, 2017 (86) 2,201 (51) 2,064 OCI before reclassifications (60) (1,861) (5) (1,926) Amounts reclassified from AOCI — 148 5 153 Deferred income tax benefit (expense) (19) 368 — 349 Adoption of new accounting standard (4) — — (4) Balance, December 31, 2018 (169) 856 (51) 636 OCI before reclassifications 80 3,306 (28) 3,358 Amounts reclassified from AOCI — (182) 4 (178) Deferred income tax benefit (expense) (3) (681) 5 (679) Balance, December 31, 2019 (92) 3,299 (70) 3,137 OCI before reclassifications 14 2,854 (9) 2,859 Amounts reclassified from AOCI — (42) 6 (36) Deferred income tax benefit (expense) 9 (611) 1 (601) Balance, December 31, 2020 $ (69) $ 5,500 $ (72) $ 5,359 (1) Includes cash flow hedges of $(49), $(26) and $9 as of December 31, 2020, 2019 and 2018, respectively. See Note 5 for additional information on cash flow hedges. The following table presents the amounts of AOCI reclassifications for the years ended December 31, 2020 and 2019 (dollars in millions): Amount Reclassified from AOCI Details about AOCI Components 2020 2019 Affected Line Item in Net unrealized investment gains (losses): Net unrealized gains and losses on available-for-sale securities $ (8) $ 84 Investment related gains (losses), net Cash flow hedges – Interest rate (4) 1 (1) Cash flow hedges – Currency/Interest rate — — (1) Cash flow hedges – Forward bond purchase commitments — — (1) Deferred policy acquisition costs attributed to unrealized gains and losses 54 97 (2) Total 42 182 Provision for income taxes (12) (38) Net unrealized gains (losses), net of tax $ 30 $ 144 Amortization of defined benefit plan items: Prior service cost (credit) $ 1 $ 1 (3) Actuarial gains/(losses) (7) (5) (3) Total (6) (4) Provision for income taxes 1 1 Amortization of defined benefit plans, net of tax $ (5) $ (3) Total reclassifications for the period $ 25 $ 141 (1) See Note 5 for information on cash flow hedges. (2) See Note 8 for information on deferred policy acquisition costs. (3) See Note 10 for information on employee benefit plans.

Equity Based Compensation

Equity Based Compensation	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Equity Based Compensation	Equity Based Compensation The Company adopted the RGA Flexible Stock Plan (the “Plan”) in February 1993, as amended, and the Flexible Stock Plan for Directors (the “Directors Plan”) in January 1997, as amended, (collectively, the “Stock Plans”). The Stock Plans provide for the award of benefits (collectively “Benefits”) of various types, including stock options, stock appreciation rights (“SARs”), restricted stock, performance shares, cash awards, and other stock-based awards, to key employees, officers, directors and others performing significant services for the benefit of the Company or its subsidiaries. As of December 31, 2020, shares authorized for the granting of Benefits under the Plan and the Directors Plan totaled 14,960,077 and 412,500 respectively. The Company uses treasury shares or shares made available from authorized but unissued shares to support the future exercise of options or settlement of awards granted under its stock plans. Equity-based compensation expense of $(12) million, $39 million, and $30 million related to grants or awards under the Stock Plans was recognized in 2020, 2019 and 2018, respectively. The decrease in equity compensation expense for the year ended December 31, 2020, is attributable to the reduction in the estimated financial performance measures results associated with performance-based stock awards, primarily due to the adverse impact of COVID-19 on the Company’s financial results. Equity-based compensation expense is principally related to the issuance of performance contingent restricted units, stock appreciation rights and restricted stock. In general, stock awards granted under the Plan become exercisable over vesting periods ranging from one to five years. SARs are generally granted with a conversion price equal to the stock’s fair value at the date of grant and expire 10 years after the date of grant. There are no options outstanding under the Directors Plan during the periods presented. Information with respect to grants under the Stock Plans are as follows. Stock Options and Stock Appreciation Rights The following table presents a summary of stock option and SAR activity: Number of Options and SARs Weighted-Average Exercise/Conversion Price Aggregate Intrinsic Value (in millions) Outstanding at December 31, 2019 2,031,797 $ 92.63 Granted 455,455 $ 117.96 Exercised (312,345) $ 61.70 Forfeited (6,512) $ 126.50 Outstanding at December 31, 2020 2,168,395 $ 102.30 $ 43.5 Awards exercisable 1,695,704 $ 95.68 $ 43.5 The intrinsic value of awards exercised was $15 million, $31 million, and $26 million for 2020, 2019 and 2018, respectively. Awards Outstanding Awards Exercisable Range of Exercise Prices Number Outstanding as Weighted-Average Weighted- Number Weighted-Average $50.00 - $89.99 503,239 2.0 $ 62.41 503,239 $ 62.41 $90.00 - $99.99 711,645 4.8 $ 92.55 711,645 $ 92.55 $100.00 - $139.99 608,599 8.4 $ 120.90 269,284 $ 124.74 $140.00 + 344,912 7.7 $ 147.80 211,536 $ 148.37 Totals 2,168,395 5.6 $ 102.30 1,695,704 $ 95.68 The following table presents the weighted average assumptions used to determine the fair value of SARs issued: For the years ended December 31, 2020 2019 2018 Dividend yield 2.37 % 1.65 % 1.33 % Risk-free rate of return 0.69 % 2.67 % 2.79 % Expected volatility 18.8 % 18.2 % 21.4 % Expected life (years) 7.0 6.0 7.0 Weighted average exercise price of stock options granted $ 117.85 $ 145.25 $ 150.87 Weighted average fair value of stock options granted $ 15.14 $ 26.59 $ 36.31 The Black-Scholes model was used to determine the fair value recognized in the financial statements of SARs that have been granted. The Company used daily historical volatility when calculating a SAR’s value. The benchmark rate is based on observed interest rates for instruments with maturities similar to the expected term of the stock options. Dividend yield is determined based on historical dividend distributions compared to the price of the underlying common stock as of the valuation date and held constant over the life of the stock options. The Company estimated expected life using the historical average years to exercise or cancellation. Performance Contingent Units Performance contingent units (“PCUs”), are units that, if they vest, are multiplied by a performance factor to produce a number of final PCUs that are paid in the Company’s common stock. Each PCU represents the right to receive up to two shares of Company common stock, depending on the results of certain performance measures over a three-year period. The compensation expense related to the PCUs is recognized ratably over the requisite performance period. Performance shares are accounted for as equity awards, but are not credited with dividend-equivalents for actual dividends paid on the Company’s common stock during the performance period. Restricted Stock Units In general, restricted stock units (“RSUs”) become payable at the end of a three- or ten-year vesting period. Each RSU, if they vest, represents the right to receive one share of Company common stock. RSUs awarded under the plan generally have no strike price and are included in the Company’s shares outstanding. The following table presents a summary of Performance Share and Restricted Stock Unit activity: Performance Contingent Units Restricted Stock Units Outstanding at December 31, 2019 325,851 62,194 Granted 175,047 37,135 Change in units based on performance factor (67,847) — Paid (138,785) (20,232) Forfeited (3,137) (2,707) Outstanding at December 31, 2020 (1) 291,129 76,390 (1) Amount outstanding at December 31, 2020, includes the amount of shares to be issued under RSUs expected to vest and number of shares to be issued under PCUs at target performance. The PCU amount of shares do not reflect potential increases or decreases that may result from the performance factor, except for the 2018 – 2020 PCU grants, which vested as of December 31, 2020. During 2020, the Company issued 175,047 PCUs to key employees at a weighted average fair value per unit of $117.85. In May 2020 and May 2019, RGA’s board of directors approved a 132% and 135% share payout for each PCU granted in 2017 and 2016, resulting in the issuance of 138,785 and 248,789 shares of common stock from treasury, respectively. As of December 31, 2020, the total compensation cost of non-vested awards not yet recognized in the financial statements was $6.2 million. It is estimated that these costs will vest over a weighted average period of 1.2 years. The majority of the awards granted each year under the board-approved incentive compensation package and Directors Plan are made in the first quarter of each year.

Quarterly Results of Operations

Quarterly Results of Operations	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) Years Ended December 31, (in millions, except per share data) Three Months Ended 2020 March 31, June 30, September 30, December 31, Total Revenues $ 3,204 $ 3,606 $ 3,643 $ 4,143 Total benefits and expenses 3,300 3,411 3,358 3,974 Income before income taxes (96) 195 285 169 Net Income (88) 158 213 132 Earnings Per Share: Basic earnings per share $ (1.41) $ 2.49 $ 3.13 $ 1.95 Diluted earnings per share (1.41) 2.48 3.12 1.94 2019 March 31, June 30, September 30, December 31, Total Revenues $ 3,420 $ 3,467 $ 3,628 $ 3,785 Total benefits and expenses 3,203 3,207 3,281 3,477 Income before income taxes 217 260 347 308 Net Income 170 202 263 235 Earnings Per Share: Basic earnings per share $ 2.70 $ 3.23 $ 4.19 $ 3.75 Diluted earnings per share 2.65 3.18 4.12 3.68

Summary of Investments Other Th

Summary of Investments Other Than Investments in Related Parties	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]
Summary of Investments Other Than Investments in Related Parties	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE I-SUMMARY OF INVESTMENTS-OTHER THAN INVESTMENTS IN RELATED PARTIES December 31, 2020 (in millions) Type of Investment Amortized Cost Estimated Fair Value Amount at Which Shown in the Balance Sheets (1) Fixed maturity securities: United States government and government agencies and authorities $ 1,242 $ 1,437 $ 1,437 State and political subdivisions 1,237 1,390 1,390 Foreign governments (2) 8,482 10,923 10,923 Public utilities 3,904 4,537 4,537 Mortgage-backed and asset-backed securities 6,624 6,777 6,777 All other corporate bonds 28,059 31,671 31,671 Total fixed maturity securities $ 49,548 $ 56,735 $ 56,735 Equity securities $ 155 $ 132 $ 132 Mortgage loans on real estate 5,787 5,787 Policy loans 1,258 1,258 Funds withheld at interest 5,432 5,432 Short-term investments 227 227 Other invested assets 2,829 2,829 Total investments $ 65,236 $ 72,400 (1) Fixed maturity securities are classified as available-for-sale and carried at fair value. (2) Includes fixed maturities directly issued by foreign governments, supranational and foreign government-sponsored enterprises.

Condensed Financial Information

Condensed Financial Information of The Registrant	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of The Registrant	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE II—CONDENSED FINANCIAL INFORMATION OF THE REGISTRANT December 31, (in millions) 2020 2019 2018 CONDENSED BALANCE SHEETS Assets: Fixed maturity securities available-for-sale, at fair value $ 642 $ 525 Short-term and other investments 172 19 Cash and cash equivalents 494 10 Investment in subsidiaries 16,937 14,486 Loans to subsidiaries 1,010 1,010 Other assets 326 270 Total assets $ 19,581 $ 16,320 Liabilities and stockholders’ equity: Long-term debt – unaffiliated (1) $ 3,569 $ 2,974 Long-term debt – affiliated (2) 500 500 Other liabilities 1,160 1,244 Stockholders’ equity 14,352 11,602 Total liabilities and stockholders’ equity $ 19,581 $ 16,320 CONDENSED STATEMENTS OF INCOME Interest / dividend income (3) $ 472 $ 308 $ 576 Investment related gains (losses), net 14 4 (5) Operating expenses (59) (55) (36) Interest expense (202) (206) (181) Income (loss) before income tax and undistributed earnings of subsidiaries 225 51 354 Income tax expense (benefit) (21) (33) (37) Net income (loss) before undistributed earnings of subsidiaries 246 84 391 Equity in undistributed earnings of subsidiaries 169 786 325 Net income 415 870 716 Other comprehensive income (loss) (29) (33) 21 Total comprehensive income $ 386 $ 837 $ 737 The condensed financial information of RGA (the “Parent Company”) should be read in conjunction with the consolidated financial statements of RGA and its subsidiaries and the notes thereto (the “Consolidated Financial Statements”). These condensed unconsolidated financial statements reflect the results of operations, financial position and cash flows for RGA. Investments in subsidiaries are accounted for using the equity method of accounting. (1) Long-term debt – unaffiliated consists of the following: 2020 2019 $400 million 5.00% Senior Notes due 2021 $ 400 $ 400 $400 million 4.70% Senior Notes due 2023 399 399 $400 million 3.95% Senior Notes due 2026 400 400 $600 million 3.90% Senior Notes due 2029 599 599 $600 million 3.15% Senior Notes due 2030 598 — $400 million 6.20% Subordinated Debentures due 2042 400 400 $400 million 5.75% Subordinated Debentures due 2056 400 400 $400 million Variable Rate Junior Subordinated Debentures due 2065 398 398 Subtotal 3,594 2,996 Unamortized debt issuance costs (25) (22) Total $ 3,569 $ 2,974 (2) Long-term debt – affiliated in 2020 and 2019 consists of $500 million of subordinated debt issued to various operating subsidiaries. (3) Interest/dividend income includes $340 million and $175 million of cash dividends received from consolidated subsidiaries in 2020 and 2019, respectively. REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE II—CONDENSED FINANCIAL INFORMATION OF THE REGISTRANT (continued) December 31, (in millions) 2020 2019 2018 CONDENSED STATEMENTS OF CASH FLOWS Operating activities: Net income $ 415 $ 870 $ 716 Equity in earnings of subsidiaries (169) (786) (325) Other, net (170) 72 37 Net cash provided by operating activities 76 156 428 Investing activities: Sales of fixed maturity securities available-for-sale 358 576 482 Purchases of fixed maturity securities available-for-sale (400) (494) (383) Change in short-term investments (165) — — Change in other invested assets (26) — — Capital contributions to subsidiaries (78) (96) (82) Net cash (used in) provided by investing activities (311) (14) 17 Financing activities: Dividends to stockholders (182) (163) (140) Proceeds from issuance of common stock, net 481 — — Purchases of treasury stock (163) (101) (300) Exercise of stock options, net 1 6 3 Change in cash collateral for derivative positions and other arrangements (11) (92) (2) Principal payments on debt — (397) — Proceeds from unaffiliated long-term debt issuance 598 599 — Debt issuance costs (5) (5) — Net cash provided by (used in) financing activities 719 (153) (439) Change in cash and cash equivalents 484 (11) 6 Cash and cash equivalents, beginning of period 10 21 15 Cash and cash equivalents, end of period $ 494 $ 10 $ 21 Supplementary information: Interest paid $ 187 $ 192 $ 176 Income taxes paid, net of refunds $ 23 $ 9 $ 93

Supplementary Insurance Informa

Supplementary Insurance Information	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]
Supplementary Insurance Information	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE III—SUPPLEMENTARY INSURANCE INFORMATION (in millions) As of December 31, Deferred Policy Future Policy Benefits and Other Policy Claims and 2020 U.S. and Latin America: Traditional $ 1,816 $ 12,245 $ 2,578 Financial Solutions 255 23,104 18 Canada: Traditional 195 3,474 292 Financial Solutions — 16 4 Europe, Middle East and Africa: Traditional 264 1,379 1,389 Financial Solutions — 5,881 66 Asia Pacific: Traditional 1,045 3,568 2,059 Financial Solutions 41 4,187 2 Corporate and Other — 875 5 Total $ 3,616 $ 54,729 $ 6,413 2019 U.S. and Latin America: Traditional $ 1,806 $ 11,969 $ 2,143 Financial Solutions 313 23,728 18 Canada: Traditional 200 3,260 219 Financial Solutions — 23 42 Europe, Middle East and Africa: Traditional 250 1,197 1,109 Financial Solutions — 5,703 51 Asia Pacific: Traditional 927 2,837 2,121 Financial Solutions 16 2,215 2 Corporate and Other — 451 6 Total $ 3,512 $ 51,383 $ 5,711 REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE III—SUPPLEMENTARY INSURANCE INFORMATION (continued) (in millions) Year ended December 31, Premium Income Net Investment Policyholder Amortization of Other Expenses (1) 2020 U.S. and Latin America: Traditional $ 5,838 $ 714 $ 5,979 $ 200 $ 679 Financial Solutions 53 999 764 52 109 Canada: Traditional 1,052 207 909 16 201 Financial Solutions 83 1 68 — 3 Europe, Middle East and Africa: Traditional 1,555 72 1,389 31 186 Financial Solutions 252 193 163 — 50 Asia Pacific: Traditional 2,681 107 2,293 65 274 Financial Solutions 180 85 206 19 25 Corporate and Other — 197 8 — 354 Total $ 11,694 $ 2,575 $ 11,779 $ 383 $ 1,881 2019 U.S. and Latin America: Traditional $ 5,729 $ 769 $ 5,339 $ 199 $ 697 Financial Solutions 39 931 737 31 113 Canada: Traditional 1,066 205 857 12 249 Financial Solutions 89 3 80 — 4 Europe, Middle East and Africa: Traditional 1,442 73 1,205 36 199 Financial Solutions 218 195 175 — 52 Asia Pacific: Traditional 2,568 104 2,317 36 223 Financial Solutions 146 46 162 16 27 Corporate and Other — 194 22 — 380 Total $ 11,297 $ 2,520 $ 10,894 $ 330 $ 1,944 2018 U.S. and Latin America: Traditional $ 5,534 $ 730 $ 5,131 $ 180 $ 698 Financial Solutions 27 706 442 109 106 Canada: Traditional 1,024 199 848 13 251 Financial Solutions 43 2 37 — 2 Europe, Middle East and Africa: Traditional 1,424 66 1,233 27 179 Financial Solutions 195 134 116 — 37 Asia Pacific: Traditional 2,296 96 1,885 92 262 Financial Solutions 1 40 40 2 19 Corporate and Other — 166 12 — 308 Total $ 10,544 $ 2,139 $ 9,744 $ 423 $ 1,862 (1) Includes policy acquisition costs and other insurance expenses, excluding amortization of DAC. Also includes other operating expenses, interest expense, and collateral finance and securitization expense.

Supplemental Schedule of Reinsu

Supplemental Schedule of Reinsurance	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Reinsurance	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE IV—REINSURANCE (in millions) As of or for the Year ended December 31, Gross Amount Ceded to Other Assumed from Net Amounts Percentage of 2020 Life insurance in force $ 1,990 $ 184,625 $ 3,480,692 $ 3,298,057 105.5 % Premiums U.S. and Latin America: Traditional $ 23 $ 585 $ 6,399 $ 5,837 109.6 % Financial Solutions 3 — 50 $ 53 94.3 Canada: Traditional — 54 1,106 $ 1,052 105.1 Financial Solutions — — 83 $ 83 100.0 Europe, Middle East and Africa: Traditional 32 24 1,548 $ 1,556 99.5 Financial Solutions — 178 430 $ 252 170.6 Asia Pacific: Traditional — 106 2,787 $ 2,681 104.0 Financial Solutions — — 180 $ 180 100.0 Total $ 58 $ 947 $ 12,583 $ 11,694 107.6 2019 Life insurance in force $ 1,316 $ 192,864 $ 3,480,206 $ 3,288,658 105.8 % Premiums U.S. and Latin America: Traditional $ 29 $ 591 $ 6,291 5,729 109.8 % Financial Solutions 2 — 37 39 95.4 Canada: Traditional — 54 1,120 1,066 105.0 Financial Solutions — — 89 89 100.0 Europe, Middle East and Africa: Traditional 45 52 1,449 1,442 100.6 Financial Solutions — 148 366 218 167.9 Asia Pacific: Traditional — 84 2,652 2,568 103.2 Financial Solutions — — 146 146 100.0 Total $ 76 $ 929 $ 12,150 $ 11,297 107.5 2018 Life insurance in force $ 1,363 $ 186,172 $ 3,329,181 $ 3,144,372 105.9 % Premiums U.S. and Latin America: Traditional $ 32 $ 593 $ 6,095 $ 5,534 110.2 % Financial Solutions 5 — 22 27 82.7 Canada: Traditional — 47 1,071 1,024 104.6 Financial Solutions — — 43 43 100.0 Europe, Middle East and Africa: Traditional 26 26 1,424 1,424 100.0 Financial Solutions — 144 339 195 173.5 Asia Pacific: Traditional — 50 2,346 2,296 102.2 Financial Solutions — — 1 1 100.0 Total $ 63 $ 860 $ 11,341 $ 10,544 107.6

Valuation and Qualifying Accoun

Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE V—VALUATION AND QUALIFYING ACCOUNTS (in millions) Additions Description Balance at Charged to Costs Charged to Other Deductions Balance at End of Period 2020 Valuation allowance for deferred income taxes $ 236 $ (4) $ 19 $ — $ 251 Valuation allowance for mortgage loans (1) 12 38 14 — 64 Valuation allowance for fixed maturity securities available-for-sale — 41 — 21 20 2019 Valuation allowance for deferred income taxes $ 181 $ 56 $ (1) $ — $ 236 Valuation allowance for mortgage loans 11 1 — — 12 2018 Valuation allowance for deferred income taxes $ 227 $ (34) $ (12) $ — $ 181 Valuation allowance for mortgage loans 9 2 — — 11

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Consolidation and Basis of Presentation	Basis of Presentation The consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates include those used in determining deferred policy acquisition costs, premiums receivable, future policy benefits, incurred but not reported claims, income taxes, valuation of investments and investment impairments, and valuation of embedded derivatives. Actual results could differ materially from the estimates and assumptions used by management. The accompanying consolidated financial statements include the accounts of RGA and its subsidiaries, all of which are wholly owned, and any variable interest entities where the Company is the primary beneficiary. The Company evaluates variable interest entities in accordance with the general accounting principles for Consolidation . Entities in which the Company has significant influence over the operating and financing decisions but are not required to be consolidated are reported under the equity method of accounting. Intercompany balances and transactions have been eliminated. There were no subsequent events that would require disclosure or adjustments to the accompanying consolidated financial statements through the date the consolidated financial statements were issued.
Investments	Investments Fixed Maturity Securities Fixed maturity securities classified as available-for-sale are reported at fair value and are so classified based upon the possibility that such securities could be sold prior to maturity if that action enables the Company to execute its investment philosophy and appropriately match investment results to operating and liquidity needs. Unrealized gains and losses on fixed maturity securities classified as available-for-sale, less applicable deferred income taxes as well as related adjustments to deferred acquisition costs, if applicable, are reflected as a direct charge or credit to accumulated other comprehensive income (“AOCI”) in stockholders’ equity. Investment income is recognized as it accrues or is legally due. Realized gains and losses on sales of investments are included in investment related gains (losses), net, as are impairments and change in allowance for credit losses. The cost of investments sold is primarily determined based upon the specific identification method. Equity Securities Equity securities are carried at fair value and realized and unrealized gains and losses are included in investment related gains (losses), net. Mortgage Loans on Real Estate Mortgage loans on real estate are carried at unpaid principal balances, net of any unamortized premium or discount, unamortized balance of loan origination fees and expenses, and valuation allowances. Interest income is accrued on the principal amount of the mortgage loan based on its contractual interest rate. Amortization of premiums, discounts, and loan origination fees are recorded using the effective yield method. The Company accrues interest on loans until it is probable the Company will not receive interest or the loan is 90 days past due. Interest income, amortization of premiums, accretion of discounts, amortization of loan origination fees and prepayment fees are reported in investment income, net of related expenses. Funds Withheld at Interest Funds withheld at interest represent amounts contractually withheld by ceding companies in accordance with reinsurance agreements. For agreements written on a modified coinsurance (“modco”) basis and agreements written on a coinsurance funds withheld basis, assets that support the net statutory reserves or as defined in the treaty, are withheld and legally owned by the ceding company. Interest, recorded in investment income, net of related expenses in the consolidated statements of income, accrues to these assets at calculated rates as defined by the treaty terms. Changes in the value of the equity options held within the funds withheld portfolio associated with equity-indexed annuity treaties are reflected in investment income, net of related expenses. Short-term Investments Short-term investments represent investments with remaining maturities of one year or less, but greater than three months, at the time of acquisition and are stated at estimated fair value or amortized cost, which approximates estimated fair value. Interest on short-term investments is recorded in investment income, net of related expenses. Other Invested Assets In addition to derivative contracts discussed below, other invested assets include Federal Home Loan Bank of Des Moines (“FHLB”) common stock, limited partnership interests, joint ventures (other than operating joint ventures), lifetime mortgages and contractholder-directed investments. FHLB common stock are carried at cost as required by GAAP. Limited partnership interests which based on their nature and structure do not meet the characteristics of an equity security under applicable accounting standards, are primarily carried at cost. Joint ventures and certain limited partnerships are reported using the equity method of accounting. Lifetime mortgages are carried at unpaid principal balances, net of any unamortized premium or discount, unamortized balance of loan origination fees and expenses, and valuation allowances. Interest income is accrued on the principal amount of the lifetime mortgage based on its contractual interest rate. The fair value option (“FVO”) was elected for contractholder-directed investments supporting unit-linked variable annuity type liabilities that do not qualify for presentation and reporting as separate accounts. Changes in estimated fair value of these securities are included in investment income, net of related expenses. Securities Borrowing, Lending and Repurchase Agreements The Company participates in securities borrowing programs whereby securities, which are not reflected on the Company’s consolidated balance sheets, are borrowed from third parties. The borrowed securities are used to provide collateral under affiliated reinsurance transactions. The Company is generally required to maintain a minimum of 100% to 105% of the fair value, or par value under certain programs, of the borrowed securities as collateral. The collateral generally consists of rights to reinsurance treaty cash flows. If cash flows from the reinsurance treaties are insufficient to maintain the minimum collateral requirement, the Company may substitute cash or securities to meet the requirement. The Company participates in securities lending and repurchase/reverse repurchase programs whereby securities, reflected as investments on the Company’s consolidated balance sheets, are loaned or pledged to a third party. In return, the Company receives securities as collateral from the third parties, generally in an amount equal to a minimum of 100% to 105% of the fair value of the securities lent or pledged. The securities received as collateral are not reflected on the Company’s consolidated balance sheets. Allowance for Credit Losses and Impairments Fixed Maturity Securities The Company identifies fixed maturity securities that could result in a credit loss by monitoring market events that could impact issuers’ credit ratings, business climates, management changes, litigation, government actions and other similar factors. The Company also monitors late payments, pricing levels, rating agency actions, key financial ratios, financial statements, revenue forecasts and cash flow projections as indicators of credit issues. The Company reviews all securities on a case-by-case basis to determine whether a decline in value exists and whether an allowance for credit losses or impairment for non-credit losses should be recognized. The Company considers relevant facts and circumstances in evaluating whether a security is impaired due to credit or non-credit components. Relevant facts and circumstances considered include: (1) the reasons for the decline in fair value; (2) the issuer’s financial position and access to capital; and (3) the Company’s intent to sell a security or whether it is more likely than not it will be required to sell the security before the recovery of its amortized cost that, in some cases, may extend to maturity. Beginning on January 1, 2020, with the Company’s adoption of Financial Instruments – Credit Losse s, credit losses are recognized through an allowance account. Prior to January 1, 2020, credit losses were recognized as a reduction to the amortized cost. Credit impairments and changes in the allowance for credit losses on fixed maturity securities are reflected in investment related gains (losses), net on the consolidated statements of income. Non-credit impairment losses are recognized in accumulated other comprehensive income (“AOCI”). See “New Accounting Pronouncements” in Note 2 – “Significant Accounting Policies and Pronouncements” in the Notes to Consolidated Financial Statements for a discussion on the effect of the adoption of the standard on the Company’s consolidated financial statements. Impairment losses on fixed maturity securities recognized in the financial statements are dependent on the facts and circumstances related to the specific security. If the Company intends to sell a security or it is more likely than not that it would be required to sell a security before the recovery of its amortized cost, less any recorded credit loss, it recognizes an impairment loss in investment related gains (losses), net for the difference between amortized cost and fair value. The Company estimates the amount of the credit loss component of a fixed maturity security impairment as the difference between amortized cost and the present value of the expected cash flows of the security. The Company excludes accrued interest from the amortized cost and the present value of the expected cash flows of the security. The present value is determined using the best estimate cash flows discounted at the effective interest rate implicit to the security at the date of purchase or the current yield to accrete an asset-backed or floating rate security. The techniques and assumptions for establishing the best estimate cash flows vary depending on the type of security. The asset-backed securities’ cash flow estimates are based on security-specific facts and circumstances that may include collateral characteristics, expectations of delinquency and default rates, loss severity and prepayment speeds and structural support, including subordination and guarantees. The Company writes off uncollectible fixed maturity securities when (1) it has sufficient information to determine that the issuer of the security is insolvent or (2) it has received notice that the issuer of the security has filed for bankruptcy, and the collectability of the asset is expected to be adversely impacted by the bankruptcy. In periods after an impairment loss is recognized for non-credit loss components on a fixed maturity security, the Company will report the impaired security as if it had been purchased on the date it was impaired and will continue to estimate the present value of the estimated cash flows of the security. Mortgage Loans on Real Estate Beginning on January 1, 2020, with the Company’s adoption of Financial Instruments – Credit Losse s, valuation allowances on mortgage loans are computed on an expected loss basis using a model that utilizes probability of default and loss given default methods over the lifetime of the loan. Within the reasonable and supportable forecast period (i.e. typically two years), valuation allowances for mortgage loans are established based on several pool-level loan assumptions, defaults and loss severity, loss expectations for loans with similar risk characteristics and industry statistics. These evaluations are revised as conditions change and new information becomes available. The evaluation also includes the impact of expected changes in future macro-economic conditions. The Company reverts to historical loss information for periods beyond which it believes it is able to develop or obtain reasonable and supportable forecasts of future economic conditions. See “New Accounting Pronouncements” in Note 2 – “Significant Accounting Policies and Pronouncements” in the Notes to the Consolidated Financial Statements for a discussion on the effect of the adoption of the standard on the Company’s consolidated financial statements. Prior to January 1, 2020, valuation allowances on mortgage loans were computed on an incurred loss basis based upon several loan factors, including the Company’s historical experience for loan losses, defaults and loss severity, loss expectations for loans with similar risk characteristics and industry statistics. These evaluations were revised as conditions changed and new information became available. In addition to historical experience, management considered qualitative factors that included the impact of changing macro-economic conditions, which may or may not have been reflected in the loan portfolio performance, and the quality of the loan portfolio. Any interest accrued or received on the net carrying amount of the impaired loan is included in investment income or applied to the principal of the loan, depending on the assessment of the collectability of the loan. Mortgage loans deemed to be uncollectible or that have been foreclosed are charged off against the valuation allowances and subsequent recoveries, if any, are credited to the valuation allowances. Changes in valuation allowances are reported in investment related gains (losses), net on the consolidated statements of income. Other Invested Assets The Company considers its cost method investments for impairment when the carrying value of these investments exceeds the net asset value. The Company takes into consideration the severity and duration of this excess when deciding if the cost method investment is impaired. For equity method investments (including real estate joint ventures), the Company considers financial and other information provided by the investee, other known information and inherent risks in the underlying investments, as well as future capital commitments, in determining whether an impairment has occurred.
Policy Loans Receivable	Policy Loans Policy loans are reported at the unpaid principal balance. Interest income on such loans is recorded as earned using the contractually agreed-upon interest rate. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due the ceding company upon the death of the insured or surrender of the underlying policy.
Derivative Instruments	Derivative Instruments Overview The Company utilizes a variety of derivative instruments including swaps, options, forwards and futures, primarily to manage or hedge interest rate risk, credit risk, inflation risk, foreign currency risk, market volatility and various other market risks associated with its business. The Company does not invest in derivatives for speculative purposes. It is the Company’s policy to enter into derivative contracts primarily with highly rated parties. See Note 5 – “Derivative Instruments” for additional detail on the Company’s derivative positions. Accounting and Financial Statement Presentation of Derivatives Derivatives are carried on the Company’s consolidated balance sheets primarily in other invested assets or other liabilities, at fair value. Certain derivatives are subject to master netting provisions and reported as a net asset or liability. On the date a derivative contract is executed, the Company designates the derivative as (1) a fair value hedge, (2) a cash flow hedge, (3) a net investment hedge in a foreign operation or (4) free-standing derivatives held for other risk management purposes, which primarily involve managing asset or liability risks associated with the Company’s reinsurance treaties that do not qualify for hedge accounting. Changes in the fair value of free-standing derivative instruments, which do not receive accounting hedge treatment, are primarily reflected in investment related gains (losses), net. Changes in the fair value of non-investment free-standing derivative instruments (e.g. mortality and longevity swaps), which do not receive accounting hedge treatment, are reflected in other revenues. Hedge Documentation and Hedge Effectiveness To qualify for hedge accounting, at the inception of the hedging relationship, the Company formally documents its risk management objective and strategy for undertaking the hedging transaction, as well as its designation of the hedge as either (i) a fair value hedge; (ii) a cash flow hedge; or (iii) a hedge of a net investment in a foreign operation. In this documentation, the Company sets forth how the hedging instrument is expected to hedge the designated risks related to the hedged item and sets forth the method that will be used to retrospectively and prospectively assess the hedging instrument’s effectiveness and the method that will be used to measure ineffectiveness. A derivative designated as a hedging instrument must be assessed as being highly effective in offsetting the designated risk of the hedged item. Hedge effectiveness is formally assessed at inception and periodically throughout the life of the designated hedging relationship. Under a fair value hedge, changes in the fair value of the hedging derivative, including amounts measured as ineffective, and changes in the fair value of the hedged item related to the designated risk being hedged, are reported within investment related gains (losses), net. The fair values of the hedging derivatives are exclusive of any accruals that are separately reported in the consolidated statements of income within investment income or interest expense to match the location of the hedged item. Under a cash flow hedge, changes in the fair value of the hedging derivative measured as effective are reported within AOCI and the deferred gains or losses on the derivative are reclassified into the consolidated statements of income when the Company’s earnings are affected by the variability in cash flows of the hedged item. The fair values of the hedging derivatives are exclusive of any accruals that are separately reported in the consolidated statements of income within investment income or interest expense to match the location of the hedged item. In a hedge of a net investment in a foreign operation, changes in the fair value of the hedging derivative that are measured as effective are reported within AOCI consistent with the translation adjustment for the hedged net investment in the foreign operation. Changes in the fair value of the hedging instrument measured as ineffective are reported within investment related gains (losses), net. The Company discontinues hedge accounting prospectively when: (i) it is determined that the derivative is no longer highly effective in offsetting changes in the estimated fair value or cash flows of a hedged item; (ii) the derivative expires, is sold, terminated, or exercised; (iii) it is no longer probable that the hedged forecasted transaction will occur; or (iv) the derivative is de-designated as a hedging instrument. When hedge accounting is discontinued because it is determined that the derivative is not highly effective, the derivative continues to be carried in the consolidated balance sheets at fair value, with changes in fair value recognized in investment related gains (losses), net. The carrying value of the hedged asset or liability under a fair value hedge is no longer adjusted for changes in its estimated fair value due to the hedged risk, and the cumulative adjustment to its carrying value is amortized into income over the remaining life of the hedged item. Provided the hedged forecasted transaction occurrence is still probable, the changes in estimated fair value of derivatives recorded in other comprehensive income (loss) (“OCI”) related to discontinued cash flow hedges are released into the consolidated statements of income when the Company’s earnings are affected by the variability in cash flows of the hedged item. When hedge accounting is discontinued because it is no longer probable that the forecasted transactions will occur on the anticipated date or within two months of that date, the derivative continues to be carried in the consolidated balance sheets at its estimated fair value, with changes in estimated fair value recognized currently in investment related gains (losses), net. Deferred gains and losses of a derivative recorded in OCI pursuant to the discontinued cash flow hedge of a forecasted transaction that is no longer probable are recognized immediately in investment related gains (losses), net. In all other situations in which hedge accounting is discontinued, the derivative is carried at its estimated fair value in the consolidated balance sheets, with changes in its estimated fair value recognized in the current period as investment related gains (losses), net. Embedded Derivatives The Company reinsures certain annuity products that contain terms that are deemed to be embedded derivatives, primarily equity-indexed annuities and variable annuities with guaranteed minimum benefits. The Company assesses reinsurance contract terms to identify embedded derivatives, which are required to be bifurcated under the general accounting principles for Derivatives and Hedging . If the contract is not reported for in its entirety at fair value and it is determined that the terms of the embedded derivative are not clearly and closely related to the economic characteristics of the host contract, and that a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is bifurcated from the host contract and accounted for separately. Embedded derivatives are carried on the consolidated balance sheets at fair value in the same line item as the host contract. Changes in the fair value of embedded derivatives associated with equity-indexed annuities are reflected in interest credited on the consolidated statements of income and changes in the fair value of embedded derivatives associated with variable annuity guaranteed minimum benefits are reflected in investment related gains (losses), net on the consolidated statements of income. See “Interest-Sensitive Contract Liabilities” below for additional information on embedded derivatives related to equity-indexed and variable annuities. The Company has implemented an economic hedging strategy to mitigate the volatility associated with its reinsurance of variable annuity guaranteed minimum benefits. The hedging strategy is designed such that changes in the fair value of the hedge contracts, primarily futures, swap contracts and options, move in the opposite direction of changes in the fair value of the embedded derivatives. While the Company actively manages its hedging program, the hedges that are in place may not be totally effective in offsetting the embedded derivative changes due to the many variables that must be managed and the Company may see a corresponding increase or decrease in the net liability. The Company has elected not to assess this hedging strategy for hedge accounting treatment. Additionally, reinsurance treaties written on a modco or funds withheld basis are subject to the general accounting principles for Derivatives and Hedging related to embedded derivatives. The Company’s funds withheld at interest balances are primarily associated with its reinsurance treaties structured on a modco or funds withheld basis, the majority of which were subject to the general accounting principles for Derivatives and Hedging related to embedded derivatives. Management believes the embedded derivative feature in each of these reinsurance treaties is similar to a total return swap on the assets held by the ceding companies. The valuation of embedded derivatives is sensitive to the investment credit spread environment. Changes in investment credit spreads are also affected by the application of a credit valuation adjustment (“CVA”). The fair value calculation of an embedded derivative in an asset position utilizes a CVA based on the ceding company’s credit risk. Conversely, the fair value calculation of an embedded derivative in a liability position utilizes a CVA based on the Company’s credit risk. Generally, an increase in investment credit spreads, ignoring changes in the CVA, will have a negative impact on the fair value of the embedded derivative (decrease in income). The fair value of the embedded derivatives is included in the funds withheld at interest line item on the consolidated balance sheets. The change in the fair value of the embedded derivatives is recorded in investment related gains (losses), net on the consolidated statements of income.
Fair Value Measurements	Fair Value Measurements General accounting principles for Fair Value Measurements and Disclosures define fair value, establish a framework for measuring fair value, establish a fair value hierarchy based on the inputs used to measure fair value and enhance disclosure requirements for fair value measurements. In compliance with these principles, the Company has categorized its assets and liabilities, based on the priority of the inputs to the valuation technique, into a three level hierarchy or separately for assets measured using the net asset value (“NAV”). The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1), the second highest priority to quoted prices in markets that are not active or inputs that are observable either directly or indirectly (Level 2) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure fair value fall within different levels of the hierarchy, the category level is based on the lowest priority level input that is significant to the fair value measurement of the asset or liability. See Note 6 – “Fair Value of Assets and Liabilities” for further details on the Company’s assets and liabilities recorded at fair value.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash on deposit and highly liquid debt instruments purchased with an original maturity of three months or less.
Premiums Receivable	Premiums Receivable Premiums are accrued when due and in accordance with information received from the ceding company. When the Company enters into a new reinsurance agreement, it records accruals based on the terms of the reinsurance treaty. Similarly, when a ceding company fails to report information on a timely basis, the Company records accruals based on the terms of the reinsurance treaty as well as historical experience. Other management estimates include adjustments for increased in force on existing treaties, lapsed premiums given historical experience, the financial health of specific ceding companies, collateral value and the legal right of offset on related amounts (i.e. allowances and claims) owed to the ceding company. Under the legal right of offset provisions in its reinsurance treaties, the Company can withhold payments for allowances and claims from unpaid premiums. Based on its review of these factors and historical experience, the Company did not believe a provision for doubtful accounts was necessary as of December 31, 2020 or 2019.
Deferred Policy Acquisition Costs	Deferred Policy Acquisition Costs Costs of acquiring new business, which vary with and are directly related to the production of new business, have been deferred to the extent that such costs are deemed recoverable from future premiums or gross profits. Such costs include commissions and allowances as well as certain costs of policy issuance and underwriting. Non-commission costs related to the acquisition of new and renewal insurance contracts may be deferred only if they meet the following criteria: • Incremental direct costs of a successful contract acquisition • Portions of employees’ salaries and benefits directly related to time spent performing specified acquisition activities for a contract that has been acquired or renewed • Other costs directly related to the specified acquisition or renewal activities that would not have been incurred had that acquisition contract transaction not occurred The Company tests the recoverability for each year of business at issue before establishing additional deferred acquisition costs (“DAC”). The Company also performs annual tests to establish that DAC are expected to remain recoverable, and if financial performance significantly deteriorates to the point where a deficiency exists, a cumulative charge to current operations will be recorded. No such adjustments related to DAC recoverability were made in 2020, 2019 and 2018. DAC related to traditional life insurance contracts are amortized with interest over the premium-paying period of the related policies in proportion to the ratio of individual period premium revenues to total anticipated premium revenues over the life of the policy. Such anticipated premium revenues are estimated using the same assumptions used for computing liabilities for future policy benefits. DAC related to interest-sensitive life and investment-type policies are amortized over the lives of the policies, in proportion to the gross profits realized from mortality, investment income less interest credited, and expense margins.
Other Reinsurance Balances	Other Reinsurance Balances The Company assumes and retrocedes financial reinsurance contracts that do not expose it to a reasonable possibility of loss from insurance risk. These contracts are reported as deposits and are included in other reinsurance assets/liabilities. The amount of revenue reported in other revenues on these contracts represents fees and the cost of insurance under the terms of the reinsurance agreement. Assets and liabilities are reported on a net or gross basis, depending on the specific details within each treaty. Reinsurance agreements reported on a net basis, where a legal right of offset exists, are generally included in other reinsurance balances on the consolidated balance sheets. Balances resulting from the assumption and/or subsequent transfer of benefits and obligations resulting from cash flows related to variable annuities have also been classified as other reinsurance balance assets and/or liabilities. Other reinsurance assets are included in premiums receivable and other reinsurance balances while other reinsurance liabilities are included in other reinsurance balances.
Goodwill and Value of Business Acquired	Goodwill and Value of Business Acquired Goodwill, reported in other assets, is not amortized into results of operations, but instead is reviewed at least annually for impairment and written down only in the periods in which the recorded value of goodwill exceeds its fair value. Goodwill as of December 31, 2020 and 2019, totaled $7 million. The value of business acquired (“VOBA”) is amortized in proportion to the ratio of annual premium revenues to total anticipated premium revenues or in relation to the present value of estimated profits. Anticipated premium revenues have been estimated using assumptions consistent with those used in estimating reserves for future policy benefits. The carrying value is reviewed at least annually for indicators of impairment in value. Carrying value of VOBA, net of accumulated amortization, was approximately $4 million and $5 million as of December 31, 2020 and 2019, respectively, and is reported in other assets. Amortization expense for the years ended December 31, 2020, 2019 and 2018, was $0.5 million, $0.7 million, and $0.4 million, respectively. Future amortization of VOBA is not material.
Value of Distribution Agreements and Customer Relationships Acquired	Value of Distribution Agreements and Customer Relationships Acquired Value of distribution agreements (“VODA”) is reported in other assets and represents the present value of future profits associated with the expected future business derived from the distribution agreements. Value of customer relationships acquired (“VOCRA”) is also reported in other assets and represents the present value of the expected future profits associated with the expected future business acquired through existing customers of the acquired company or business. VODA is amortized over a useful life of 15 years and the VOCRA is also amortized over a 15 year period in proportion to expected revenues generated, with amortization included in policy acquisition costs and other insurance expenses. Each year the Company reviews VODA and VOCRA to determine the recoverability of these balances. VODA and VOCRA totaled approximately $25 million and $33 million, including accumulated amortization of $96 million and $88 million, as of December 31, 2020 and 2019, respectively. VODA and VOCRA amortization expense for the years ended December 31, 2020, 2019 and 2018 was $8 million, $8 million and $8 million, respectively. Amortization of the VODA and VOCRA is estimated to be $7 million, $6 million, $6 million and $6 million during 2021, 2022, 2023 and 2024, respectively, with the VODA and VOCRA expected to be fully amortized by the end of 2024. Other Acquired Intangible Assets Other acquired intangibles are reported in other assets and primarily represent intangibles and licenses acquired through the Company’s acquisition of service and technology oriented companies in an effort to both support its clients and generate new future revenue streams. Other acquired intangible assets are amortized using the straight-line method over the estimated useful life of 10 to 15 years, with amortization included in other operating expenses. Each year the Company reviews other acquired intangibles to determine the recoverability of these balances. Other acquired intangibles totaled approximately $30 million and $34 million, including accumulated amortization of $12 million and $8 million, as of December 31, 2020 and 2019, respectively. Other acquired intangibles amortization expense for the years ended December 31, 2020, 2019 and 2018, was $4 million, $4 million and $4 million, respectively. Amortization of other acquired intangibles is estimated to be $4 million during 2021, 2022, 2023, 2024 and 2025, respectively.
Other Assets	Property, Equipment, Leasehold Improvements and Computer Software Property, equipment and leasehold improvements, which are included in other assets, are stated at cost, less accumulated depreciation. Depreciation is determined using the straight-line method over the estimated useful lives of the assets, as appropriate. The estimated life is generally 40 years for company occupied real estate property, from one to seven years for leasehold improvements, and from three to seven years for all other property and equipment. The cost basis of property,
Future Policy Benefits	Future Policy Benefits Liabilities for future benefits on life policies are established in an amount adequate to meet the estimated future obligations on policies in force. Liabilities for future policy benefits under long-duration life insurance policies have been computed based upon expected investment yields, mortality and withdrawal (lapse) rates, and other assumptions. These assumptions include a margin for adverse deviation and vary with the characteristics of the plan of insurance, year of issue, age of insured, and other appropriate factors. Interest rates range from 3.0% to 6.0%. The mortality and withdrawal assumptions are based on the Company’s experience as well as industry experience and standards. In establishing reserves for future policy benefits, the Company assigns policy liability assumptions to particular timeframes (eras) in such a manner as to be consistent with the underlying assumptions and economic conditions at the time the risks are assumed. The Company maintains a consistent approach to setting the provision for adverse deviation between eras. Liabilities for future benefits on longevity business, including annuities in the payout phase, are established in an amount adequate to meet the estimated future obligations on policies in force. Liabilities for future benefits related to the longevity business, including annuities in the payout phase have been calculated using expected mortality, investment yields, and other assumptions. These assumptions include a margin for adverse deviation and vary with the characteristics of the plan of insurance, year of issue, age of insured, and other appropriate factors. The mortality assumptions are based on the Company’s experience as well as industry experience and standards. A deferred profit liability is established when the gross premium exceeds the net premium. The Company periodically reviews actual and anticipated experience compared to the assumptions used to establish policy benefits. The Company establishes premium deficiency reserves if actual and anticipated experience indicates that existing policy liabilities together with the present value of future gross premiums will not be sufficient to cover the present value of future benefits, settlement and maintenance costs and to recover unamortized acquisition costs. Anticipated investment income is considered in the calculation of premium deficiency losses for short-duration contracts. The premium deficiency reserve is established by a charge to income, as well as a reduction in unamortized acquisition costs and, to the extent there are no unamortized acquisition costs, an increase in future policy benefits. The reserving process includes normal periodic reviews of assumptions used and adjustments of reserves to incorporate the refinement of the assumptions. Any such adjustments relate only to policies assumed in recent periods and the adjustments are reflected by a cumulative charge or credit to current operations. The Company reinsures disability products in various markets. Liabilities for future benefits on disability policies’ active lives are established in an amount adequate to meet the estimated future obligations on policies in force. These reserves are the amounts that, with the additional premiums to be received and interest thereon compounded annually at certain assumed rates, are calculated to be sufficient to meet the various policy and contract obligations as they mature. The Company establishes future policy benefits for guaranteed minimum death benefits (“GMDB”) relating to the reinsurance of certain variable annuity contracts by estimating the expected value of death benefits in excess of the projected account balance and recognizing the excess proportionally over the accumulation period based on total expected assessments. The Company regularly evaluates estimates used and adjusts the additional liability balance, with a related charge or credit to claims and other policy benefits, if actual experience or other evidence suggests that earlier assumptions should be revised. The
Interest-Sensitive Contract Liabilities	Interest-Sensitive Contract Liabilities Liabilities for future benefits on interest-sensitive life and investment-type contract liabilities are carried at the accumulated contract holder values without reduction for potential surrender or withdrawal charges. The Company reinsures asset-intensive products, including annuities and corporate-owned life insurance. The investment portfolios for these products are segregated for management purposes within the general account of the respective legal entity. The liabilities under asset-intensive insurance contracts or reinsurance contracts reinsured on a coinsurance basis are included in interest-sensitive contract liabilities on the consolidated balance sheets. Asset-intensive contracts principally include individual fixed annuities in the accumulation phase, single premium immediate annuities, equity-indexed annuities, individual variable annuities, corporate-owned life and interest-sensitive whole life insurance contracts. Interest-sensitive contract liabilities are equal to (i) policy account values, which consist of an accumulation of gross premium payments; (ii) credited interest less expenses, mortality charges, and withdrawals; and (iii) fair value adjustments relating to business combinations. Liabilities for immediate annuities are calculated as the present value of the expected cash flows, with the locked-in discount rate determined such that there is no gain or loss at inception. Additionally, certain annuity contracts the Company reinsures contain terms, such as guaranteed minimum benefits and equity participation options, which are deemed to be embedded derivatives and are accounted for based on the general accounting principles for Derivatives and Hedging . The Company establishes liabilities for guaranteed minimum living benefits relating to certain variable annuity products as follows: • Guaranteed minimum income benefits (“GMIB”) provide the contract holder, after a specified period of time determined at the time of issuance of the variable annuity contract, with a minimum level of income (annuity) payments. Under the reinsurance treaty, the Company makes a payment to the ceding company equal to the GMIB net amount-at-risk at the time of annuitization and thus these contracts meet the net settlement criteria of the general accounting principles for Derivatives and Hedging and the Company assumes no mortality risk. Accordingly, the GMIB is considered an embedded derivative, which is measured at fair value separately from the host variable annuity product. • Guaranteed minimum withdrawal benefits (“GMWB”) guarantee the contract holder a return of their purchase payment via partial withdrawals, even if the account value is reduced to zero, provided that the contract holder’s cumulative withdrawals in a contract year do not exceed a certain limit. The initial guaranteed withdrawal amount is equal to the initial benefit base as defined in the contract (typically, the initial purchase payments plus applicable bonus amounts). The GMWB is also an embedded derivative, which is measured at fair value separately from the host variable annuity product. • Guaranteed minimum accumulation benefits (“GMAB”) provide the contract holder, after a specified period of time determined at the time of issuance of the variable annuity contract, with a minimum accumulation of their purchase payments even if the account value is reduced to zero. The initial guaranteed accumulation amount is equal to the initial benefit base as defined in the contract (typically, the initial purchase payments plus applicable bonus amounts). The GMAB is also an embedded derivative, which is measured at fair value separately from the host variable annuity product. For GMIB, GMWB and GMAB, the initial benefit base is increased by additional purchase payments made within a certain time period and decreased by benefits paid and/or withdrawal amounts. After a specified period of time, the benefit base may also increase as a result of an optional reset as defined in the contract. The fair values of the GMIB, GMWB and GMAB embedded derivative liabilities are reflected in interest-sensitive contract liabilities on the consolidated balance sheets and are calculated based on actuarial and capital market assumptions related to the projected cash flows, including benefits and related contract charges over the lives of the contracts. These projected cash flows incorporate expectations concerning policyholder behavior, such as lapses, withdrawals and benefit selections, and capital market assumptions such as interest rates and equity market volatilities. In measuring the fair value of GMIBs, GMWBs and GMABs, the Company attributes a portion of the fees collected from the policyholder equal to the present value of expected future guaranteed minimum income, withdrawal and accumulation benefits (at inception). The changes in fair value are reported in investment related gains (losses), net. Any additional fees represent “excess” fees and are reported in other revenues on the consolidated statements of income. These variable annuity guaranteed living benefits may be more costly than expected in volatile or declining equity markets or falling interest rate markets, causing an increase in interest-sensitive contract liabilities, negatively affecting net income. The Company reinsures equity-indexed annuity contracts. These contracts allow the contract holder to elect an interest rate return or an equity market component where interest credited is based on the performance of common stock market indices, such as the S&P 500 Index ® , the Dow Jones Industrial Average, or the NASDAQ. The equity market option is considered an embedded derivative, similar to a call option, which is reflected at fair value on the consolidated balance sheets in interest-sensitive contract liabilities. The fair value of embedded derivatives is computed based on a projection of future equity option costs using a budget methodology, discounted back to the balance sheet date using current market indicators of volatility and interest rates. Changes in the fair value of the embedded derivatives are included as a component of interest credited on the consolidated statements of income. The Company reviews its estimates of actuarial liabilities for interest-sensitive contract liabilities and compares them with its actual experience. Differences between actual experience and the assumptions used in pricing these guarantees and benefits and in the establishment of the related liabilities result in variances in profit and could result in losses. The effects of changes in such estimated liabilities are included in the results of operations in the period in which the changes occur.
Other Policy Claims and Benefits	Other Policy Claims and Benefits Claims payable for incurred but not reported losses are determined using case-basis estimates and lag studies of past experience. The time lag from the date of the claim or death to when the ceding company reports the claim to the Company can vary significantly by ceding company, business segment and product type, but generally averages around 3.2 months. Incurred but not reported claims are estimates on an undiscounted basis, using actuarial estimates of historical claims expense, adjusted for current trends and conditions. These estimates are continually reviewed and the ultimate liability may vary significantly from the amount recognized, which are reflected in claims and other policy benefits in the period in which they are determined.
Other Liabilities	Other Liabilities Other liabilities primarily include investments in transit, separate accounts, employee benefits, cash collateral received on derivative positions and current federal income taxes payable.
Income Taxes	Income Taxes The U.S. consolidated tax return includes the operations of RGA and all eligible subsidiaries. Certain RGA subsidiaries file separate U.S. income tax returns as these companies are currently ineligible for inclusion in the consolidated federal tax return. The Company’s foreign subsidiaries are taxed under applicable local statutes. The Company provides for federal, state and foreign income taxes currently payable, as well as those deferred due to temporary differences between the tax basis of assets and liabilities and the reported amounts, and are recognized in net income or in certain cases in OCI. The Company’s accounting for income taxes represents management’s best estimate of various events and transactions considering the laws enacted as of the reporting date. The Tax Cuts and Jobs Act of 2017 (“U.S. Tax Reform”) creates additional complexity due to various provisions that require management judgment and assumptions, which are subject to change. Deferred tax assets and liabilities are measured by applying the relevant jurisdictions’ enacted tax rate for the period in which the temporary differences are expected to reverse to the temporary difference change for that period. The Company will establish a valuation allowance if management determines, based on available information, that it is more likely than not that deferred income tax assets will not be realized. The Company has deferred tax assets including those related to foreign tax credits, net operating, and capital losses. The Company has projected its ability to utilize its deferred tax assets and established a valuation allowance on the portion of the deferred tax assets the Company believes more likely than not will not be realized. Significant judgment is required in determining whether valuation allowances should be established as well as the amount of such allowances. When making such a determination, consideration is given to, among other things, the following: (i) taxable income in prior carryback years (ii) future reversals of existing taxable temporary differences; (iii) future taxable income exclusive of reversing temporary differences and carryforwards; and (iv) tax planning strategies. Any such changes could significantly affect the amounts reported in the consolidated financial statements in the year these changes occur. The Company made a policy election to account for global intangible low-taxed income (“GILTI”) as a period cost. The Company reports uncertain tax positions in accordance with generally accepted accounting principles. In order to recognize the benefit of an uncertain tax position, the position must meet the more likely than not criteria of being sustained. Unrecognized tax benefits due to tax uncertainties that do not meet the more likely than not criteria are included within income tax liabilities and are charged to earnings in the period that such determination is made. The Company classifies interest related
Collateral Finance Facility	Collateral Finance and Securitization Notes Collateral finance and securitization notes represent private placement asset-backed structured financing transactions. Collateral finance notes are issued on specified insurance policies reinsured by the Company’s regulated subsidiaries. Transaction costs, primarily interest expense, are reflected in collateral finance and securitization expense. See Note 14 – “Collateral Finance and Securitization Notes” for additional information.
Foreign Currency Translation	Foreign Currency TranslationAssets, liabilities and results of foreign operations are recorded based on the functional currency of each foreign operation. The determination of the functional currency is based on economic facts and circumstances pertaining to each foreign operation. The Company’s material functional currencies are the U.S. dollar, Canadian dollar, British pound, Australian dollar, Japanese yen, Korean won, Euro and South African rand. The translation of the functional currency into U.S. dollars is performed for balance sheet accounts using current exchange rates in effect at the balance sheet date and for revenue and expense accounts using weighted-average exchange rates during each year. Gains or losses, net of applicable deferred income taxes, resulting from such translation are included in accumulated currency translation adjustments, in AOCI until the underlying functional currency operation is sold or substantially liquidated.
Recognition of Revenues and Related Expenses	Recognition of Revenues and Related Expenses – Long-Duration Products Life and health premiums are recognized as revenue when due from the insured, and are reported net of amounts retroceded. Benefits and expenses are reported net of amounts retroceded and are associated with earned premiums so that profits are recognized over the life of the related contract. This association is accomplished through the provision for future policy benefits and the amortization of deferred policy acquisition costs. Other revenue includes items such as treaty recapture fees, fees associated with financial reinsurance and policy changes on interest-sensitive and investment-type products that the Company reinsures. Any fees that are collected in advance of the period benefited are deferred and recognized over the period benefited. For certain reinsurance transactions involving in force blocks of business, the ceding company pays a premium equal to the initial required reserve (future policy benefit). In such transactions, for income statement presentation, the Company nets the expense associated with the establishment of the reserve against the premiums from the transaction. Revenues for interest-sensitive and investment-type products consist of investment income, policy charges for the cost of insurance, policy administration, and surrenders that have been assessed against policy account balances during the period. Interest-sensitive contract liabilities for these products represent policy account balances before applicable surrender charges. Policy benefits and claims that are charged to expenses include claims incurred in the period in excess of related policy account balances and interest credited to policy account balances. Interest is credited to policyholder account balances according to terms of the policies or contracts. For each of its reinsurance contracts, the Company must determine if the contract provides indemnification against loss or liability relating to insurance risk, in accordance with GAAP. The Company must review all contractual features, particularly those that may limit the amount of insurance risk to which the Company is subject or features that delay the timely reimbursement of claims. If the Company determines that a contract does not expose it to a reasonable possibility of a significant loss from insurance risk, the Company records the contract on a deposit method of accounting with any net amount receivable reflected as an asset within premiums receivable and other reinsurance balances, and any net amount payable reflected as a liability within other reinsurance balances. Fees earned on the contracts are reflected as other revenues, rather than premiums.
Share-based Payment Arrangement [Policy Text Block]	Equity Based Compensation The Company expenses the fair value of stock awards included in its incentive compensation plans. The fair value of the awards is expensed over the performance or service period, which generally corresponds to the vesting period, and is recognized as an increase to additional paid-in-capital in stockholders’ equity, and stock-based compensation expense is reflected in other operating expenses.
Earnings Per Share	Earnings Per Share Basic earnings per share is calculated based on the weighted average number of common shares outstanding during the period. Diluted earnings per share include the dilutive effects assuming the exercise or issuance of stock awards.
Future Adoption of New Accounting Standards	New Accounting Pronouncements Changes to the general accounting principles are established by the Financial Accounting Standards Board (“FASB”) in the form of accounting standards updates to the FASB Accounting Standards Codification TM . Accounting standards updates not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s consolidated financial statements. Description Date of Adoption Effect on the Consolidated Financial Statements Standards adopted: Leases This new standard, based on the principle that entities should recognize assets and liabilities arising from leases, does not significantly change the lessees’ recognition, measurement and presentation of expenses and cash flows from the previous accounting standard. Leases are classified as finance or operating. The new standard’s primary change is the requirement for entities to recognize a lease liability for payments and a right of use asset representing the right to use the leased asset during the term of operating lease arrangements. Lessees are permitted to make an accounting policy election to not recognize the asset and liability for leases with a term of twelve months or less. Lessors’ accounting is largely unchanged from the previous accounting standard. In addition, the new standard expands the disclosure requirements of lease arrangements. Early adoption is permitted. This guidance was adopted by applying the optional transition method. The adoption of the standard did not have a material impact on the Company’s results of operations or financial position. The adoption of the updated guidance resulted in the Company recognizing a right-to-use asset and lease liability of $55 million included in other assets and other liabilities, respectively, in the consolidated balance sheets. Derivatives and Hedging This updated guidance improves the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and make certain targeted improvements to simplify the application of the hedge accounting in current GAAP related to the assessment of hedge effectiveness. Early adoption is permitted. Financial Instruments – Credit Losses This guidance adds to U.S. GAAP an impairment model, known as the current expected credit loss (“CECL”) model that is based on expected losses rather than incurred losses. For traditional and other receivables, held-to-maturity debt securities, loans and other instruments entities will be required to use the new forward-looking “expected loss” model that generally will result in earlier recognition of allowance for losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses similar to what they do today, except the losses will be recognized through an allowance for credit losses and adjusted each period for changes in credit risks. Early adoption is permitted. For asset classes within the scope of the CECL model, this guidance was adopted through a cumulative-effect adjustment to retained earnings (that is, a modified-retrospective approach). For available-for-sale debt securities, this guidance was applied prospectively. The allowance for credit losses increased when this guidance was adopted to include expected losses over the lifetime of commercial mortgages and other loans, including reasonable and supportable forecasts and expected changes in future economic conditions. The overall impact was an approximate $15 million pre-tax increase in the allowance for credit losses. This increase was reflected as a decrease to opening retained earnings, net of income taxes, as of January 1, 2020. Fair Value Measurement This guidance is part of the FASB’s disclosure framework project and eliminates certain disclosure requirements for fair value measurement, requires entities to disclose new information and modifies existing disclosure requirements. Early adoption is permitted. Reference Rate Reform This guidance eases the potential burden in accounting for, or recognizing the effects of, reference rate reform on financial reporting, which includes the transition away from the London Interbank Offered Rate (“LIBOR”). The ASU provides optional expedients and exceptions for applying GAAP modification to contracts and hedge accounting relationships affected by reference rate reform on financial reporting. Under the new guidance, a change in the reference rate for a contract that meets certain criteria will be accounted for as a continuation of that contract rather than the creation of a new contract. The new guidance applies to debt, insurance contracts, leases, derivative contracts and other arrangements. Description Anticipated Date of Adoption Effect on the Consolidated Financial Statements Standards not yet adopted: Financial Services – Insurance This guidance significantly changes how insurers account for long-duration insurance contracts. The new guidance also significantly expands the disclosure requirements of long-duration insurance contracts. The new guidance will be effective for annual and interim reporting periods beginning January 1, 2023. Below are the most significant areas of change: Cash flow assumptions for measuring liability for future policy benefits The new guidance requires insurers to review, and if necessary, update the cash flow assumptions used to measure liabilities for future policy benefits periodically. The change in the liability estimate as a result of updating cash flow assumptions will be recognized in net income. Cash flow assumptions for measuring liability for future policy benefits The Company will likely adopt this guidance on a modified retrospective basis as of the earliest period presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its results of operations and financial position but anticipates the updated guidance will likely have a material impact. Discount rate assumption for measuring liability for future policy benefits The new guidance requires insurers to update the discount rate assumption used to measure liabilities for future policy benefits at each reporting period, and the discount rate utilized must be based on an upper-medium grade fixed income instrument yield. The change in the liability estimate as a result of updating the discount rate assumption will be recognized in other comprehensive income. Discount rate assumption for measuring liability for future policy benefits The Company will likely adopt this guidance on a modified retrospective basis as of the earliest period presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its results of operations and financial position but anticipates the updated guidance will likely have a material impact. Market risk benefits The new guidance created a new category of benefit features called market risk benefits that will be measured at fair value with changes in fair value attributable to a change in the instrument-specific credit risk recognized in other comprehensive income. Market risk benefits The Company will adopt this guidance on a retrospective basis as of the earliest period presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its results of operations and financial position but anticipates the updated guidance will likely have a material impact. Amortization of deferred acquisition costs (“DAC”) and other balances The new guidance requires DAC and other balances to be amortized on a constant level basis over the expected term of the related contracts. Amortization of deferred acquisition costs (“DAC”) and other balances The Company will likely adopt this guidance on a modified retrospective basis as of the earliest period presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its results of operations and financial position but anticipates the updated guidance will likely have a material impact.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2020
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Table Text Block]	The following table sets forth the computation of basic and diluted earnings per share on net income (in millions, except per share information): 2020 2019 2018 Earnings: Net income (numerator for basic and diluted calculations) $ 415 $ 870 $ 716 Shares: Weighted average outstanding shares (denominator for basic calculations) 65.4 62.7 63.7 Equivalent shares from outstanding stock awards 0.4 1.2 1.4 Diluted shares (denominator for diluted calculations) 65.8 63.9 65.1 Earnings per share: Basic $ 6.35 $ 13.88 $ 11.25 Diluted 6.31 13.62 11.00

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2020
Investments [Abstract]
Available-for-sale Securities [Table Text Block]	The following tables provide information relating to investments in fixed maturity securities by type as of December 31, 2020 and 2019 (dollars in millions): December 31, 2020: Amortized Allowance for Credit Losses Unrealized Unrealized Estimated % of Total Available-for-sale: Corporate $ 31,963 $ 17 $ 4,356 $ 94 $ 36,208 63.9 % Canadian government 3,145 — 1,995 — 5,140 9.1 RMBS 1,735 — 84 2 1,817 3.2 ABS 3,099 — 35 42 3,092 5.4 CMBS 1,790 3 102 21 1,868 3.3 U.S. government 1,242 — 196 1 1,437 2.5 State and political subdivisions 1,237 — 157 4 1,390 2.4 Other foreign government 5,337 — 479 33 5,783 10.2 Total fixed maturity securities $ 49,548 $ 20 $ 7,404 $ 197 $ 56,735 100.0 % December 31, 2019: Amortized Unrealized Unrealized Estimated % of Total Available-for-sale: Corporate $ 29,205 $ 2,269 $ 81 $ 31,393 61.4 % Canadian government 3,016 1,596 — 4,612 9.0 RMBS 2,339 62 3 2,398 4.7 ABS 2,973 19 14 2,978 5.8 CMBS 1,841 61 3 1,899 3.7 U.S. government 2,096 57 1 2,152 4.2 State and political subdivisions 1,074 93 3 1,164 2.3 Other foreign government 4,209 321 5 4,525 8.9 Total fixed maturity securities $ 46,753 $ 4,478 $ 110 $ 51,121 100.0 %
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]	The following table includes fixed maturity securities pledged and received as collateral and assets in trust held to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Amortized Estimated Amortized Estimated Fixed maturity securities pledged as collateral $ 148 $ 162 $ 113 $ 116 Fixed maturity securities received as collateral n/a 1,784 n/a 727 Assets in trust held to satisfy collateral requirements 27,675 31,179 27,290 29,239
Concentration Risk Disclosure [Text Block]	The Company’s exposure to concentrations of credit risk from single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies, as well as the securities disclosed below, as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Amortized Estimated Amortized Estimated Fixed maturity securities guaranteed or issued by: Government of Japan $ 1,493 $ 1,491 $ 813 $ 852 Canadian province of Quebec 1,303 2,474 1,205 2,163 Canadian province of Ontario 1,054 1,528 1,014 1,379
Investments Classified By Contractual Maturity Date [Table Text Block]	The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale as of December 31, 2020, are shown by contractual maturity in the table below (dollars in millions). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Structured securities are shown separately in the table below as they are not due at a single maturity date. Amortized Cost Estimated Fair Value Available-for-sale: Due in one year or less $ 1,351 $ 1,362 Due after one year through five years 8,248 8,797 Due after five years through ten years 10,676 11,956 Due after ten years 22,649 27,843 Structured securities 6,624 6,777 Total $ 49,548 $ 56,735
Fixed Maturity Holdings Industry Types [Table Text Block]	The tables below show the major sectors of the Company’s corporate fixed maturity holdings as of December 31, 2020 and 2019 (dollars in millions): December 31, 2020: Amortized Cost Estimated % of Total Finance $ 11,785 $ 13,236 36.6 % Industrial 16,274 18,435 50.9 Utility 3,904 4,537 12.5 Total $ 31,963 $ 36,208 100.0 % December 31, 2019: Amortized Cost Estimated % of Total Finance $ 10,896 $ 11,653 37.2 % Industrial 14,692 15,803 50.3 Utility 3,617 3,937 12.5 Total $ 29,205 $ 31,393 100.0 %
Roll Forward Of Cumulative Credit Loss Component Of Otti Income Loss [Table Text Block]	Corporate CMBS Other Foreign Government Total Balance, beginning of period $ — $ — $ — $ — Credit losses recognized on securities for which credit losses were not previously recorded 36 3 2 41 Reductions for securities sold during the period (19) — (2) (21) Balance, end of period $ 17 $ 3 $ — $ 20
Investments In Debt And Equity Securities Gross Unrealized Losses Disclosures [Table Text Block]	The following table presents the total gross unrealized losses for the 877 and 1,072 fixed maturity securities as of December 31, 2020 and 2019, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in millions): 2020 2019 Gross % of Total Gross % of Total Less than 20% $ 133 67.5 % $ 76 69.1 % 20% or more for less than six months 42 21.3 20 18.2 20% or more for six months or greater 22 11.2 14 12.7 Total $ 197 100.0 % $ 110 100.0 %
Fair Value And Investments In Debt And Equity Securities Disclosures [Table Text Block]	The following tables present the estimated fair values and gross unrealized losses for fixed maturity securities that have estimated fair values below amortized cost as of December 31, 2020 and 2019 (dollars in millions). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost. Less than 12 months 12 months or greater Total December 31, 2020: Estimated Gross Estimated Gross Estimated Gross Investment grade securities: Corporate $ 930 $ 29 $ 70 $ 5 $ 1,000 $ 34 RMBS 294 2 — — 294 2 ABS 1,096 17 570 11 1,666 28 CMBS 160 6 — — 160 6 U.S. government 27 1 — — 27 1 State and political subdivisions 66 1 16 3 82 4 Other foreign government 973 27 — — 973 27 Total investment grade securities 3,546 83 656 19 4,202 102 Below investment grade securities: Corporate 375 49 81 11 456 60 ABS 20 13 4 1 24 14 CMBS 91 15 — — 91 15 Other foreign government 36 3 28 3 64 6 Total below investment grade securities 522 80 113 15 635 95 Total fixed maturity securities $ 4,068 $ 163 $ 769 $ 34 $ 4,837 $ 197 Less than 12 months 12 months or greater Total December 31, 2019: Estimated Gross Estimated Gross Estimated Gross Investment grade securities: Corporate $ 1,936 $ 29 $ 293 $ 7 $ 2,229 $ 36 RMBS 367 2 84 1 451 3 ABS 773 5 739 9 1,512 14 CMBS 253 3 — — 253 3 U.S. government 49 1 — — 49 1 State and political subdivisions 103 2 12 1 115 3 Other foreign government 278 4 — — 278 4 Total investment grade securities 3,759 46 1,128 18 4,887 64 Below investment grade securities: Corporate 220 38 100 7 320 45 ABS — — — — — — CMBS — — — — — — Other foreign government — — 10 1 10 1 Total below investment grade securities 220 38 110 8 330 46 Total fixed maturity securities $ 3,979 $ 84 $ 1,238 $ 26 $ 5,217 $ 110
Investment Income [Table Text Block]	Major categories of investment income, net of related expenses, consist of the following (dollars in millions): 2020 2019 2018 Fixed maturity securities available-for-sale $ 1,928 $ 1,786 $ 1,529 Equity securities 6 8 4 Mortgage loans on real estate 282 255 214 Policy loans 56 58 59 Funds withheld at interest 279 297 310 Short-term investments and cash and cash equivalents 7 28 14 Other invested assets 109 184 99 Investment income 2,667 2,616 2,229 Investment expense (92) (96) (90) Investment income, net of related expenses $ 2,575 $ 2,520 $ 2,139
Gain (Loss) on Securities [Table Text Block]	Investment related gains (losses), net, consist of the following (dollars in millions): 2020 2019 2018 Fixed maturity securities available for sale: Impairments and change in allowance for credit losses $ (21) $ (31) $ (28) Gain on investment activity 114 151 65 Loss on investment activity (82) (50) (159) Net gains (losses) on equity securities (15) 16 (20) Other impairment losses and change in mortgage loan provision (56) (12) (12) Derivatives and other, net 27 17 (16) Total investment related gains (losses), net $ (33) $ 91 $ (170)
Schedule of Repurchase Agreements [Table Text Block]	The following table includes the amount of borrowed securities, loaned securities, and securities received as collateral as part of the securities lending program, and repurchased/reverse repurchased securities pledged and received as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Amortized Estimated Amortized Estimated Borrowed securities $ 118 $ 161 $ 339 $ 369 Securities lending: Securities loaned 94 105 98 104 Securities received n/a 102 n/a 107 Repurchase program/reverse repurchase program: Securities pledged 653 711 356 384 Securities received n/a 669 n/a 370
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]	The following tables present information on the Company’s securities lending and repurchase/reverse repurchase transactions as of December 31, 2020 and 2019, respectively (dollars in millions). Collateral associated with certain borrowed securities is not included within the tables as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows. December 31, 2020 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Securities lending transactions: Corporate $ — $ — $ — $ 105 $ 105 Total — — — 105 105 Repurchase/reverse repurchase transactions: Corporate — — — 417 417 Other foreign government — — — 294 294 Total — — — 711 711 Total transactions $ — $ — $ — $ 816 $ 816 Gross amount of recognized liabilities for securities lending and repurchase/reverse repurchase transactions in preceding table $ 771 Amounts related to agreements not included in offsetting disclosure $ 45 December 31, 2019 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Securities lending transactions: Corporate $ — $ — $ — $ 104 $ 104 Total — — — 104 104 Repurchase/reverse repurchase transactions: Corporate — — — 286 $ 286 Other foreign government — — — 98 98 Total — — — 384 384 Total transactions $ — $ — $ — $ 488 $ 488 Gross amount of recognized liabilities for securities lending and repurchase/reverse repurchase transactions in preceding table $ 478 Amounts related to agreements not included in offsetting disclosure $ 10
Disclosure Of Real Estate Holdings By Property Type [Table Text Block]	The recorded investment in mortgage loans on real estate presented below is gross of unamortized deferred loan origination fees and expenses, and valuation allowances. The following table presents the distribution of the Company’s recorded investment in mortgage loans by property type as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Carrying Value Percentage of Carrying Value Percentage of Property type: Office $ 1,702 29.0 % $ 1,771 31.0 % Retail 1,711 29.3 1,686 29.4 Industrial 1,210 20.6 1,169 20.4 Apartment 808 13.8 766 13.4 Other commercial 430 7.3 335 5.8 Recorded investment 5,861 100.0 % 5,727 100.0 % Unamortized balance of loan origination fees and expenses (10) (9) Valuation allowances (64) (12) Total mortgage loans on real estate $ 5,787 $ 5,706
Disclosure of Real Estate Holdings Classified By Contractual Maturity Date [Table Text Block]	The following table presents the maturities of the Company’s recorded investment in mortgage loans as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Recorded % of Total Recorded % of Total Due within five years $ 2,276 38.8 % $ 1,841 32.2 % Due after five years through ten years 2,768 47.3 2,944 51.4 Due after ten years 817 13.9 942 16.4 Total $ 5,861 100.0 % $ 5,727 100.0 %
Accounts Receivable, Noncurrent, Credit Quality Indicator	The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of December 31, 2020 and 2019 (dollars in millions): Recorded Investment Debt Service Ratios Construction loans >1.20x 1.00x - 1.20x <1.00x Total % of Total December 31, 2020: Loan-to-Value Ratio 0% - 59.99% $ 2,774 $ 106 $ 17 $ 12 $ 2,909 49.6 % 60% - 69.99% 2,013 62 33 — 2,108 36.0 70% - 79.99% 555 49 13 — 617 10.5 80% or greater 189 21 17 — 227 3.9 Total $ 5,531 $ 238 $ 80 $ 12 $ 5,861 100.0 % Recorded Investment Debt Service Ratios Construction loans >1.20x 1.00x - 1.20x <1.00x Total % of Total December 31, 2019: Loan-to-Value Ratio 0% - 59.99% $ 3,025 $ 52 $ 7 $ — $ 3,084 53.8 % 60% - 69.99% 1,841 53 11 — 1,905 33.3 70% - 79.99% 492 13 39 — 544 9.5 80% or greater 96 61 37 — 194 3.4 Total $ 5,454 $ 179 $ 94 $ — $ 5,727 100.0 %
Financing Receivable Credit Quality Indicators [Table Text Block]	The following table sets forth credit quality grades by year of origination of the Company’s recorded investment in mortgage loans as of December 31, 2020 (dollars in millions): Recorded Investment Year of Origination December 31, 2020: 2020 2019 2018 2017 2016 Prior Total Internal credit quality grade: High investment grade $ 411 $ 616 $ 493 $ 336 $ 574 $ 1,008 $ 3,438 Investment grade 352 496 399 407 249 368 2,271 Average — — — 19 37 55 111 Watch list — — — — — 4 4 In or near default — — — — — 37 37 Total $ 763 $ 1,112 $ 892 $ 762 $ 860 $ 1,472 $ 5,861
Financing Receivable, Past Due	The following table presents the current and past due composition of the Company’s recorded investment in mortgage loans as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 31-60 days past due $ 15 $ — Total past due 15 — Current 5,846 5,727 Total $ 5,861 $ 5,727
Recorded Investment And Allowance For Credit Losses [Table Text Block]	The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances, as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Mortgage loans: Individually measured for impairment $ 37 $ 17 Collectively measured for impairment 5,824 5,710 Recorded investment $ 5,861 $ 5,727 Valuation allowances: Individually measured for impairment $ — $ — Collectively measured for impairment 64 12 Total valuation allowances $ 64 $ 12
Allowance For Loan And Lease Losses Provision For Loss Net [Table Text Block]	The following table presents information regarding the Company’s loan valuation allowances for mortgage loans as of December 31, 2020, 2019 and 2018 (dollars in millions): 2020 2019 2018 Balance, beginning of period $ 12 $ 11 $ 9 Adoption of new accounting standard 14 — — Provision 38 1 2 Balance, end of period $ 64 $ 12 $ 11
Impaired Financing Receivables [Table Text Block]	The following table presents information regarding the portion of the Company’s mortgage loans that were impaired as of December 31, 2020 and 2019 (dollars in millions): Unpaid Principal Recorded Related Carrying Value December 31, 2020: Impaired mortgage loans with no valuation allowance recorded $ 37 $ 37 $ — $ 37 Impaired mortgage loans with valuation allowance recorded — — — — Total impaired mortgage loans $ 37 $ 37 $ — $ 37 December 31, 2019: Impaired mortgage loans with no valuation allowance recorded $ 17 $ 17 $ — $ 17 Impaired mortgage loans with valuation allowance recorded — — — — Total impaired mortgage loans $ 17 $ 17 $ — $ 17 The following table presents the Company’s average investment balance of impaired mortgage loans and the related interest income for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): 2020 2019 2018 Average Investment (1) Interest Average Investment (1) Interest Average Investment (1) Interest Impaired mortgage loans with no valuation allowance recorded $ 25 $ 1 $ 20 $ 1 $ 24 $ 1 Impaired mortgage loans with valuation allowance recorded — — — — — — Total $ 25 $ 1 $ 20 $ 1 $ 24 $ 1 (1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.
Schedule of Other Assets [Table Text Block]	Carrying values of these assets as of December 31, 2020 and 2019 are as follows (dollars in millions): 2020 2019 Limited partnership interests and real estate joint ventures $ 1,367 $ 1,134 Lifetime mortgages 935 775 Derivatives 140 117 FVO contractholder-directed unit-linked investments 289 260 Other 98 77 Total other invested assets $ 2,829 $ 2,363

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of December 31, 2020 and 2019 (dollars in millions): December 31, 2020 December 31, 2019 Primary Underlying Risk Notional Carrying Value/Fair Value Notional Carrying Value/Fair Value Amount Assets Liabilities Amount Assets Liabilities Derivatives not designated as hedging instruments: Interest rate swaps Interest rate $ 1,084 $ 93 $ 1 $ 909 $ 70 $ 3 Financial futures Equity 258 — — 307 — — Foreign currency swaps Foreign currency 150 — 18 150 — 9 Foreign currency forwards Foreign currency 347 4 2 175 1 — CPI swaps CPI 612 11 19 441 — 28 Credit default swaps Credit 1,517 13 — 1,306 5 — Equity options Equity 395 29 — 364 15 — Synthetic GICs Interest rate 16,644 — — 13,823 — — Embedded derivatives in: Modco or funds withheld arrangements — 58 — — 121 — Indexed annuity products — — 752 — — 767 Variable annuity products — — 155 — — 163 Total non-hedging derivatives 21,007 208 947 17,475 212 970 Derivatives designated as hedging instruments: Interest rate swaps Foreign currency/Interest rate 802 3 24 535 1 29 Foreign currency swaps Foreign currency 234 8 1 342 17 2 Foreign currency forwards Foreign currency 1,255 10 15 1,094 28 2 Total hedging derivatives 2,291 21 40 1,971 46 33 Total derivatives $ 23,298 $ 229 $ 987 $ 19,446 $ 258 $ 1,003
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The gain or loss on the hedged item attributable to a change in foreign currency and the offsetting gain or loss on the related foreign currency swaps as of December 31, 2020, 2019 and 2018 were (dollars in millions): Type of Fair Value Hedge Hedged Item Gains (Losses) Recognized for Derivatives Gains (Losses) Recognized for Hedged Items Investment Related Gains (Losses) For the Year Ended December 31, 2020: Foreign currency swaps Foreign-denominated fixed maturity securities $ 8 $ (10) For the Year Ended December 31, 2019: Foreign currency swaps Foreign-denominated fixed maturity securities $ (4) $ — For the Year Ended December 31, 2018: Foreign currency swaps Foreign-denominated fixed maturity securities $ (11) $ 12
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table presents the components of AOCI, before income tax, and the consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): Amounts Included in AOCI Balance December 31, 2017 $ 3 Gains (losses) deferred in other comprehensive income (loss) 6 Amounts reclassified to investment income — Amounts reclassified to interest expense — Balance December 31, 2018 9 Gains (losses) deferred in other comprehensive income (loss) (34) Amounts reclassified to investment income — Amounts reclassified to interest expense (1) Balance December 31, 2019 (26) Gains (losses) deferred in other comprehensive income (loss) (27) Amounts reclassified to investment income — Amounts reclassified to interest expense 4 Balance December 31, 2020 $ (49)
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table presents the effect of derivatives in cash flow hedging relationships on the consolidated statements of income and the consolidated statements of stockholders’ equity for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): Derivative Type Gains (Losses) Deferred in OCI Gains (Losses) Reclassified into Income from OCI For the year ended December 31, 2020: Investment Related Gains (Losses) Investment Income Interest Expense Interest rate $ (33) $ — $ — $ (4) Foreign currency/Interest rate 6 — — — Total $ (27) $ — $ — $ (4) For the year ended December 31, 2019: Interest rate $ (32) $ — $ — $ 1 Foreign currency/Interest rate (2) — — — Total $ (34) $ — $ — $ 1 For the year ended December 31, 2018: Interest rate $ 12 $ — $ — $ — Foreign currency/Interest rate (6) — — — Total $ 6 $ — $ — $ —
Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): Derivative Gains (Losses) Deferred in AOCI For the year ended Type of NIFO Hedge 2020 2019 2018 Foreign currency swaps $ 1 $ (9) $ 31 Foreign currency forwards (30) (24) 56 Total $ (29) $ (33) $ 87
Derivative Instruments Gain Loss By Income Statement Location [Table Text Block]	A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s consolidated statements of income for the years ended December 31, 2020, 2019 and 2018 is as follows (dollars in millions): Gains (Losses) for the Years Ended December 31, Type of Non-hedging Derivative Income Statement 2020 2019 2018 Interest rate swaps Investment related gains (losses), net $ 76 $ 65 $ (21) Financial futures Investment related gains (losses), net (47) (46) 21 Foreign currency swaps Investment related gains (losses), net (7) — (4) Foreign currency forwards Investment related gains (losses), net 5 1 — Consumer price index swaps Investment related gains (losses), net 16 (18) (10) Credit default swaps Investment related gains (losses), net 16 30 (2) Equity options Investment related gains (losses), net — (40) 7 Longevity swaps Other revenues — 13 9 Mortality swaps Other revenues — (1) — Subtotal 59 4 — Embedded derivatives in: Modco or funds withheld arrangements Investment related gains (losses), net (62) 11 (13) Indexed annuity products Interest credited (30) (57) 27 Variable annuity products Investment related gains (losses), net 8 5 (15) Total non-hedging derivatives $ (25) $ (37) $ (1)
Disclosure Of Credit Derivatives [Table Text Block]	The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Rating Agency Designation of Referenced Credit Obligations (1) Estimated Fair Maximum Amount of Future Payments under Credit Default Swaps (2) Weighted Average Years to Maturity (3) Estimated Fair Maximum (2) Weighted (3) AAA/AA+/AA/AA-/A+/A/A- Single name credit default swaps $ 11 $ 287 15.0 $ 2 $ 142 1.7 Subtotal 11 287 15.0 2 142 1.7 BBB+/BBB/BBB- Single name credit default swaps 2 232 1.6 3 291 1.9 Credit default swaps referencing indices — 988 3.9 — 873 4.7 Subtotal 2 1,220 3.5 3 1,164 4.0 BB+/BB/BB- Single name credit default swaps — 10 0.7 — — 0.0 Subtotal — 10 0.7 — — 0.0 Total $ 13 $ 1,517 5.6 $ 5 $ 1,306 3.7 (1) The rating agency designations are based on ratings from Standard and Poor’s (“S&P”). (2) Assumes the value of the referenced credit obligations is zero. (3) The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.
Offsetting Assets [Table Text Block]	The following table provides information relating to the netting of the Company’s derivative instruments as of December 31, 2020 and December 31, 2019 (dollars in millions): Gross Amounts Not Gross Amounts Gross Amounts Net Amounts Financial Instruments (1) Cash Collateral Net Amount December 31, 2020: Derivative assets $ 171 $ (31) $ 140 $ (30) $ (98) $ 12 Derivative liabilities 80 (31) 49 (146) (47) (144) December 31, 2019: Derivative assets $ 137 $ (20) $ 117 $ — $ (119) $ (2) Derivative liabilities 73 (20) 53 (92) (52) (91) (1) Includes initial margin posted to a central clearing partner.
Offsetting Liabilities [Table Text Block]	The following table provides information relating to the netting of the Company’s derivative instruments as of December 31, 2020 and December 31, 2019 (dollars in millions): Gross Amounts Not Gross Amounts Gross Amounts Net Amounts Financial Instruments (1) Cash Collateral Net Amount December 31, 2020: Derivative assets $ 171 $ (31) $ 140 $ (30) $ (98) $ 12 Derivative liabilities 80 (31) 49 (146) (47) (144) December 31, 2019: Derivative assets $ 137 $ (20) $ 117 $ — $ (119) $ (2) Derivative liabilities 73 (20) 53 (92) (52) (91) (1) Includes initial margin posted to a central clearing partner.

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020 and 2019 are summarized below (dollars in millions): December 31, 2020: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate $ 36,208 $ — $ 33,179 $ 3,029 Canadian government 5,140 — 5,140 — RMBS 1,817 — 1,814 3 ABS 3,092 — 2,896 196 CMBS 1,868 — 1,813 55 U.S. government 1,437 1,312 111 14 State and political subdivisions 1,390 — 1,381 9 Other foreign government 5,783 — 5,766 17 Total fixed maturity securities – available-for-sale 56,735 1,312 52,100 3,323 Equity securities 132 79 — 53 Funds withheld at interest – embedded derivatives & other 114 — — 114 Cash equivalents 1,478 1,478 — — Short-term investments 197 32 150 15 Other invested assets: Derivatives 140 — 140 — FVO contractholder-directed unit-linked investments 289 224 65 — Total other invested assets 429 224 205 — Total $ 59,085 $ 3,125 $ 52,455 $ 3,505 Liabilities: Interest-sensitive contract liabilities – embedded derivatives $ 907 $ — $ — $ 907 Other liabilities: Derivatives 49 — 49 — Total $ 956 $ — $ 49 $ 907 December 31, 2019: Fair Value Measurements Using: Total Level 1 Level 2 Level 3 Assets: Fixed maturity securities – available-for-sale: Corporate $ 31,393 $ — $ 29,207 $ 2,186 Canadian government 4,612 — 3,908 704 RMBS 2,398 — 2,349 49 ABS 2,978 — 2,865 113 CMBS 1,899 — 1,853 46 U.S. government 2,152 2,030 106 16 State and political subdivisions 1,164 — 1,155 9 Other foreign government 4,525 — 4,509 16 Total fixed maturity securities – available-for-sale 51,121 2,030 45,952 3,139 Equity securities 320 243 — 77 Funds withheld at interest – embedded derivatives 121 — — 121 Cash equivalents 274 274 — — Short-term investments 32 4 26 2 Other invested assets: Derivatives 117 — 117 — FVO contractholder-directed unit-linked investments 260 207 53 — Total other invested assets 377 207 170 — Total $ 52,245 $ 2,758 $ 46,148 $ 3,339 Liabilities: Interest-sensitive contract liabilities – embedded derivatives $ 930 $ — $ — $ 930 Other liabilities: Derivatives 53 — 53 — Total $ 983 $ — $ 53 $ 930
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed internally by the Company as of December 31, 2020 and 2019 (dollars in millions): Estimated Fair Value Valuation Unobservable Range (Weighted Average) Assets: 2020 2019 Technique Input 2020 2019 Corporate $ 37 $ 1,070 Market comparable securities Liquidity premium 0-1% (1%) 0-2% (1%) EBITDA Multiple 5.2x-11.2x (7.1x) 5.2x-7.1x (6.7x) ABS 87 101 Market comparable securities Liquidity premium 1-18% (1%) 0-4% (1%) U.S. government 14 16 Market comparable Liquidity premium 0-1% (1%) 0-1% (1%) Other foreign government — 16 Market comparable Liquidity premium 0% 0-1% (1%) Equity securities 10 32 Market comparable Liquidity premium 0% 4% EBITDA Multiple 6.9x-10.6x (7.9x) 6.9x-9.3x (7.8x) Funds withheld at interest – embedded derivatives 58 121 Total return swap Mortality 0-100% (3%) 0-100% (2%) Lapse 0-35% (13%) 0-35% (13%) Withdrawal 0-5% (3%) 0-5% (3%) CVA 0-5% (1%) 0-5% (1%) Crediting rate 2-4% (2%) 2-4% (2%) Liabilities: Interest-sensitive contract liabilities – embedded derivatives – indexed annuities 752 768 Discounted cash flow Mortality 0-100% (3%) 0-100% (2%) Lapse 0-35% (13%) 0-35% (13%) Withdrawal 0-5% (3%) 0-5% (3%) Option budget 2-4% (2%) 2-4% (2%) Interest-sensitive contract liabilities – embedded derivatives – variable annuities 155 163 Discounted cash flow Mortality 0-100% (2%) 0-100%(1%) Lapse 0-25% (4%) 0-25% (5%) Withdrawal 0-7% (5%) 0-7% (5%) CVA 0-5% (1%) 0-5% (1%) Long-term volatility 0-27% (13%) 0-27% (12%)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	For the year ended December 31, 2020: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 2,186 $ 720 $ 208 $ 25 $ 77 $ 2 $ 121 $ — $ (930) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 2 — — — — — (4) — — Investment related gains (losses), net (22) — — — (13) — (63) — 8 Interest credited — — — — — — — — (30) Included in other comprehensive income 28 1 (7) 1 — — — — — Other revenues — — — — — — — — — Purchases (1) 1,193 — 149 — 3 17 60 — (32) Sales (1) (182) — (5) — — — — — — Settlements (1) (229) — (59) (3) — (3) — — 77 Transfers into Level 3 57 — 38 — — — — — — Transfers out of Level 3 (4) (704) (70) — (14) (1) — — — Fair value, end of period $ 3,029 $ 17 $ 254 $ 23 $ 53 $ 15 $ 114 $ — $ (907) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ — $ — $ — $ — $ — $ — $ (4) $ — $ — Investment related gains (losses), net (23) — — — (13) — (63) — (2) Other revenues — — — — — — — — — Interest credited — — — — — — — — (107) Included in other comprehensive income (34) 1 (8) 1 — — — — — For the year ended December 31, 2019: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 1,331 $ 533 $ 103 $ 28 $ 33 $ 2 $ 110 $ 48 $ (945) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 1 15 — — — — — — — Investment related gains (losses), net (11) — — — 12 — 11 — 5 Interest credited — — — — — — — — (57) Included in other comprehensive income 48 162 4 1 — (1) — (2) — Other revenues — — — — — — — 12 — Purchases (1) 1,050 10 85 — 33 30 — — (17) Sales (1) (81) — (1) — (1) (1) — — — Settlements (1) (194) — (63) (4) — (1) — (58) 84 Transfers into Level 3 43 — 86 — — — — — — Transfers out of Level 3 (1) — (6) — — (27) — — — Fair value, end of period $ 2,186 $ 720 $ 208 $ 25 $ 77 $ 2 $ 121 $ — $ (930) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ 2 $ 15 $ — $ — $ — $ — $ — $ — $ — Investment related gains (losses), net (11) — — — 12 — 11 — (3) Other revenues — — — — — — — — — Interest credited — — — — — — — — (140) For the year ended December 31, 2018: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 1,337 $ 599 $ 235 $ 64 $ — $ 3 $ 122 $ 39 $ (1,014) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses (1) 14 — — — — — — — Investment related gains (losses), net (5) — 2 — (13) — (12) — (15) Interest credited — — — — — — — — 27 Included in other comprehensive income (33) (80) (3) — — — — (2) — Other revenues — — — — — — — 9 — Purchases (1) 509 — 94 — 14 3 — — (19) Sales (1) (106) — (7) — (7) — — — — Settlements (1) (273) — (62) (5) — (1) — 2 76 Transfers into Level 3 10 — 78 10 39 — — — — Transfers out of Level 3 (107) — (234) (41) — (3) — — — Fair value, end of period $ 1,331 $ 533 $ 103 $ 28 $ 33 $ 2 $ 110 $ 48 $ (945) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ (1) $ 14 $ — $ — $ — $ — $ — $ — $ — Investment related gains (losses), net (6) — — — (16) — (12) — (22) Other revenues — — — — — — — 9 — Interest credited — — — — — — — — (49) (1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	For the year ended December 31, 2020: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 2,186 $ 720 $ 208 $ 25 $ 77 $ 2 $ 121 $ — $ (930) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 2 — — — — — (4) — — Investment related gains (losses), net (22) — — — (13) — (63) — 8 Interest credited — — — — — — — — (30) Included in other comprehensive income 28 1 (7) 1 — — — — — Other revenues — — — — — — — — — Purchases (1) 1,193 — 149 — 3 17 60 — (32) Sales (1) (182) — (5) — — — — — — Settlements (1) (229) — (59) (3) — (3) — — 77 Transfers into Level 3 57 — 38 — — — — — — Transfers out of Level 3 (4) (704) (70) — (14) (1) — — — Fair value, end of period $ 3,029 $ 17 $ 254 $ 23 $ 53 $ 15 $ 114 $ — $ (907) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ — $ — $ — $ — $ — $ — $ (4) $ — $ — Investment related gains (losses), net (23) — — — (13) — (63) — (2) Other revenues — — — — — — — — — Interest credited — — — — — — — — (107) Included in other comprehensive income (34) 1 (8) 1 — — — — — For the year ended December 31, 2019: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 1,331 $ 533 $ 103 $ 28 $ 33 $ 2 $ 110 $ 48 $ (945) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses 1 15 — — — — — — — Investment related gains (losses), net (11) — — — 12 — 11 — 5 Interest credited — — — — — — — — (57) Included in other comprehensive income 48 162 4 1 — (1) — (2) — Other revenues — — — — — — — 12 — Purchases (1) 1,050 10 85 — 33 30 — — (17) Sales (1) (81) — (1) — (1) (1) — — — Settlements (1) (194) — (63) (4) — (1) — (58) 84 Transfers into Level 3 43 — 86 — — — — — — Transfers out of Level 3 (1) — (6) — — (27) — — — Fair value, end of period $ 2,186 $ 720 $ 208 $ 25 $ 77 $ 2 $ 121 $ — $ (930) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ 2 $ 15 $ — $ — $ — $ — $ — $ — $ — Investment related gains (losses), net (11) — — — 12 — 11 — (3) Other revenues — — — — — — — — — Interest credited — — — — — — — — (140) For the year ended December 31, 2018: Fixed maturity securities – available-for-sale Funds Other assets – longevity and mortality swaps Interest –sensitive contract Corporate Foreign govt Structured securities U.S. and local govt Equity securities Short-term investments Fair value, beginning of period $ 1,337 $ 599 $ 235 $ 64 $ — $ 3 $ 122 $ 39 $ (1,014) Total gains/losses (realized/unrealized) Included in earnings, net: Investment income, net of related expenses (1) 14 — — — — — — — Investment related gains (losses), net (5) — 2 — (13) — (12) — (15) Interest credited — — — — — — — — 27 Included in other comprehensive income (33) (80) (3) — — — — (2) — Other revenues — — — — — — — 9 — Purchases (1) 509 — 94 — 14 3 — — (19) Sales (1) (106) — (7) — (7) — — — — Settlements (1) (273) — (62) (5) — (1) — 2 76 Transfers into Level 3 10 — 78 10 39 — — — — Transfers out of Level 3 (107) — (234) (41) — (3) — — — Fair value, end of period $ 1,331 $ 533 $ 103 $ 28 $ 33 $ 2 $ 110 $ 48 $ (945) Total gains/losses (realized/unrealized) recorded for the period relating to those Level 3 assets and liabilities that were still held at the end of the period Included in earnings, net: Investment income, net of related expenses $ (1) $ 14 $ — $ — $ — $ — $ — $ — $ — Investment related gains (losses), net (6) — — — (16) — (12) — (22) Other revenues — — — — — — — 9 — Interest credited — — — — — — — — (49) (1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.
Fair Value Assets Measured On Nonrecurring Basis [Text Block]	Nonrecurring Fair Value Measurements The following table presents information for assets measured at an estimated fair value on a nonrecurring basis during the periods presented and still held at the reporting date (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3). Carrying Value After Measurement Net Investment Gains (Losses) At December 31, Years ended December 31, (dollars in millions) 2020 2019 2020 2019 Limited partnership interests and real estate joint ventures (1) $ 20 $ 18 $ (17) $ (11) (1) Impairments on these investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. Real estate joint ventures were recognized at estimated fair value determined using historical and forecasted information for specific properties, including net operating income, occupancy, and sales levels. The market for these investments has limited activity and price transparency.
Financial Instruments Carrying Amounts And Estimated Fair Value [Table Text Block]	The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, as of December 31, 2020 and 2019 (dollars in millions). This table excludes any payables or receivables for collateral under repurchase agreements and other transactions. The estimated fair value of the excluded amount approximates carrying value as they equal the amount of cash collateral received/paid. Estimated Fair Fair Value Measurement Using: December 31, 2020: Carrying Value (1) Value Level 1 Level 2 Level 3 NAV Assets: Mortgage loans on real estate $ 5,787 $ 6,167 $ — $ — $ 6,167 $ — Policy loans 1,258 1,258 — 1,258 — — Funds withheld at interest 5,292 5,676 — — 5,676 — Cash and cash equivalents 1,930 1,930 1,930 — — — Short-term investments 30 30 30 — — — Other invested assets 1,482 1,601 5 89 1,018 489 Accrued investment income 511 511 — 511 — — Liabilities: Interest-sensitive contract liabilities $ 18,106 $ 19,683 $ — $ — $ 19,683 $ — Long-term debt 3,573 3,901 — — 3,901 — Collateral finance and securitization notes 388 351 — — 351 — December 31, 2019: Assets: Mortgage loans on real estate $ 5,706 $ 5,935 $ — $ — $ 5,935 $ — Policy loans 1,319 1,319 — 1,319 — — Funds withheld at interest 5,526 5,870 — — 5,870 — Cash and cash equivalents 1,175 1,175 1,175 — — — Short-term investments 32 32 32 — — — Other invested assets 1,259 1,278 5 68 803 402 Accrued investment income 493 493 — 493 — — Liabilities: Interest-sensitive contract liabilities $ 19,163 $ 21,542 $ — $ — $ 21,542 $ — Long-term debt 2,981 3,179 — — 3,179 — Collateral finance and securitization notes 598 551 — — 551 — (1) Carrying values presented herein may differ from those in the Company’s consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

Reinsurance (Tables)

Reinsurance (Tables)	12 Months Ended
	Dec. 31, 2020
Reinsurance Disclosures [Abstract]
Ceded Credit Risk [Table Text Block]	The following table presents information for the Company’s ceded reinsurance receivable assets, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Reinsurer A.M. Best Rating Amount % of Total Amount % of Total Reinsurer A A+ $ 420 42.7 % $ 367 40.6 % Reinsurer B A+ 216 22.0 208 23.0 Reinsurer C A 64 6.5 84 9.3 Reinsurer D A++ 55 5.6 53 5.9 Reinsurer E A+ 46 4.7 43 4.8 Other reinsurers 182 18.5 149 16.4 Total $ 983 100.0 % $ 904 100.0 %
Reinsurance Premium And Effect On Claims And Other Policy Benefits [Table Text Block]	The effect of reinsurance on net premiums is as follows (dollars in millions): Years ended December 31, 2020 2019 2018 Direct insurance $ 58 $ 76 $ 63 Reinsurance assumed 12,583 12,150 11,341 Reinsurance ceded (947) (929) (860) Net premiums $ 11,694 $ 11,297 $ 10,544 The effect of reinsurance on claims and other policy benefits as follows (dollars in millions): Years ended December 31, 2020 2019 2018 Direct insurance $ 97 $ 113 $ 107 Reinsurance assumed 11,931 11,404 9,997 Reinsurance ceded (953) (1,320) (785) Net claims and other policy benefits $ 11,075 $ 10,197 $ 9,319
Reinsurance Information [Table Text Block]	The effect of reinsurance on life insurance in force is shown in the following schedule (dollars in millions): Direct Assumed Ceded Net Assumed/Net % December 31, 2020 $ 1,990 $ 3,480,692 $ 184,625 $ 3,298,057 105.5 % December 31, 2019 1,316 3,480,206 192,864 3,288,658 105.8 December 31, 2018 1,363 3,329,181 186,172 3,144,372 105.9

Deferred Policy Acquisition C_2

Deferred Policy Acquisition Costs (Tables)	12 Months Ended
	Dec. 31, 2020
Deferred Policy Acquisition Costs Disclosures [Abstract]
Deferred Policy Acquisition Costs [Table Text Block]	The following reflects the amounts of policy acquisition costs deferred and amortized (dollars in millions): Years ended December 31, 2020 2019 2018 Balance, beginning of year $ 3,512 $ 3,398 $ 3,240 Capitalization 478 526 608 Amortization (including interest) (405) (315) (438) Change in value of embedded derivatives 22 (15) 14 Attributed to unrealized investment gains (losses) (26) (97) 27 Foreign currency translation 35 15 (53) Balance, end of year $ 3,616 $ 3,512 $ 3,398

Income Tax (Tables)

Income Tax (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Pre-tax income for the years ended December 31, 2020, 2019 and 2018 consists of the following (dollars in millions): 2020 2019 2018 Pre-tax income - U.S. $ 79 $ 871 $ 626 Pre-tax income - foreign 474 261 220 Total pre-tax income $ 553 $ 1,132 $ 846
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The provision for income tax expense for the years ended December 31, 2020, 2019 and 2018 consists of the following (dollars in millions): 2020 2019 2018 Current income tax expense (benefit): U.S. $ 75 $ (9) $ 78 U.S. Tax Reform — — (68) Foreign 79 60 43 Total current 154 51 53 Deferred income tax expense (benefit): U.S. (60) 182 63 U.S. Tax Reform — — 6 Foreign 44 29 8 Total deferred (16) 211 77 Total provision for income taxes $ 138 $ 262 $ 130
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The Company’s effective tax rate differed from the U.S. federal income tax statutory rate of 21% as a result of the following for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): 2020 2019 2018 Tax provision at U.S. statutory rate $ 116 $ 238 $ 178 Increase (decrease) in income taxes resulting from: U.S. Tax Reform — — (62) Tax rate differences on income in other jurisdictions 21 2 4 Differences in tax basis in foreign jurisdictions (32) (23) (23) Deferred tax valuation allowance 10 56 23 Amounts related to uncertain tax positions 10 8 1 Equity based compensation (1) (8) (6) Corporate rate changes 13 (1) 1 GILTI, net of credits 13 — 10 Subpart F for non-full inclusion companies — 1 1 Foreign tax credits (7) (6) (3) Return to provision adjustments (4) (6) (1) Other, net (1) 1 7 Total provision for income taxes $ 138 $ 262 $ 130 Effective tax rate 24.9 % 23.1 % 15.4 %
Schedule Of Income Tax Expense Benefit Intraperiod Tax Allocation [Table Text Block]	Total income taxes for the years ended December 31, 2020, 2019 and 2018 were as follows (dollars in millions): 2020 2019 2018 Provision for income taxes $ 138 $ 262 $ 130 Income tax from OCI and additional paid-in-capital: Net unrealized holding gain (loss) on debt and equity securities recognized for financial reporting purposes 611 681 (368) Foreign currency translation (9) 3 19 Unrealized pension and post retirement (1) (5) — Total income taxes provided $ 739 $ 941 $ (219)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The tax effects of temporary differences that give rise to significant portions of the deferred income tax assets and liabilities at December 31, 2020 and 2019, are presented in the following tables (dollars in millions): 2020 2019 Deferred income tax assets: Nondeductible accruals $ 92 $ 95 Net operating loss carryforward 254 330 Capital loss and tax credit carryforwards — 38 Subtotal 346 463 Valuation allowance (251) (236) Total deferred income tax assets 95 227 Deferred income tax liabilities: Deferred acquisition costs 775 675 Policy reserves and other reinsurance liabilities 1,105 1,208 Invested assets 1,043 645 Outside basis difference foreign subsidiaries 354 308 Foreign currency translation 40 52 Anticipated future tax credit reduction 20 26 Other 2 1 Total deferred income tax liabilities 3,339 2,915 Net deferred income tax liabilities $ 3,244 $ 2,688 Balance sheet presentation of net deferred income tax liabilities: Included in other assets $ 19 $ 24 Included in deferred income taxes 3,263 2,712 Net deferred income tax liabilities $ 3,244 $ 2,688
Summary of Operating Loss Carryforwards [Table Text Block]	The following table presents consolidated net operating losses (“NOL”) as of December 31, 2020 (dollars in millions): 2020 NOL with no expiration and with no valuation allowance $ 103 NOL with a full valuation allowance 131 NOL with no expiration and a partial valuation allowance 646 NOL with expiration dates between 2033 & 2040 with no valuation allowance 20 Total net operating loss carryforwards $ 900
Summary of Income Tax Contingencies [Table Text Block]	A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31, 2020, 2019 and 2018, is as follows (dollars in millions): Total Unrecognized Tax Benefits 2020 2019 2018 Beginning balance, January 1 $ 333 $ 325 $ 321 Acquisition accounting — — 1 Additions for tax positions of prior years 281 264 256 Reductions for tax positions of prior years (278) (262) (257) Additions for tax positions of current year 6 6 4 Settlements with tax authorities — — — Ending balance, December 31 $ 342 $ 333 $ 325

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
Retirement Benefits [Abstract]
Schedule of Changes in Projected Benefit Obligations [Table Text Block]	A December 31 measurement date is used for all of the defined benefit and postretirement plans. The status of these plans as of December 31, 2020 and 2019 is summarized below (dollars in millions): December 31, Pension Benefits Other Benefits 2020 2019 2020 2019 Change in benefit obligation: Benefit obligation at beginning of year $ 220 $ 179 $ 87 $ 67 Service cost 14 13 3 3 Interest cost 6 7 2 3 Participant contributions — — — — Actuarial (gains) losses 25 28 (9) 15 Benefits paid (12) (8) (2) (1) Foreign exchange translations and other adjustments 1 1 — — Benefit obligation at end of year $ 254 $ 220 $ 81 $ 87
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]	December 31, Pension Benefits Other Benefits 2020 2019 2020 2019 Change in plan assets: Fair value of plan assets at beginning of year $ 133 $ 103 $ — $ — Actual return on plan assets 18 21 — — Employer contributions 18 17 2 1 Participant contributions — — — — Benefits paid and expenses (12) (8) (2) (1) Fair value of plan assets at end of year $ 157 $ 133 $ — $ — Funded status at end of year $ (97) $ (87) $ (81) $ (87)
Schedule of Net Funded Status [Table Text Block]	December 31, Qualified Plans Non-Qualified Plans (1) Total 2020 2019 2020 2019 2020 2019 Aggregate fair value of plan assets $ 157 $ 133 $ — $ — $ 157 $ 133 Aggregate projected benefit obligations 160 139 94 81 254 220 Under funded $ (3) $ (6) $ (94) $ (81) $ (97) $ (87) (1) For non-qualified plans, there are no required funding levels.
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	December 31, Pension Benefits Other Benefits 2020 2019 2020 2019 Amounts recognized in accumulated other comprehensive income: Net actuarial loss $ 71 $ 59 $ 29 $ 39 Net prior service cost (credit) — — (8) (9) Total $ 71 $ 59 $ 21 $ 30
Schedule Of Projected Benefit Obligations In Excess Of Fair Value Of Plan Assets [Table Text Block]	The following table presents information for qualified and non-qualified pension plans with a projected benefit obligation in excess of plan assets as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Projected benefit obligation $ 254 $ 220 Fair value of plan assets 157 133
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]	The following table presents information for pension plans with an accumulated benefit obligation in excess of plan assets as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Accumulated benefit obligation $ 243 $ 212 Fair value of plan assets 157 133
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	The components of net periodic benefit cost, included in other operating expenses on the consolidated statements of income, and other changes in plan assets and benefit obligations recognized in other comprehensive income were as follows (dollars in millions): Pension Benefits Other Benefits 2020 2019 2018 2020 2019 2018 Net periodic benefit cost: Service cost $ 14 $ 13 $ 13 $ 3 $ 3 $ 3 Interest cost 6 7 5 2 3 2 Expected return on plan assets (9) (7) (8) — — — Amortization of net actuarial losses 5 4 4 2 1 2 Amortization of prior service cost (credit) — — — (1) (1) (1) Settlements — — — — — — Net periodic benefit cost 16 17 14 6 6 6 Other changes in plan assets and benefit obligations recognized in other comprehensive income: Net actuarial (gains) losses 17 14 13 (8) 14 (7) Amortization of net actuarial (losses) (5) (4) (4) (2) (1) (2) Amortization of prior service (cost) credit — — — 1 1 1 Settlements — — — — — — Foreign exchange translations and other adjustments — — — — — — Total recognized in other comprehensive income 12 10 9 (9) 14 (8) Total recognized in net periodic benefit cost and other comprehensive income $ 28 $ 27 $ 23 $ (3) $ 20 $ (2)
Schedule of Expected Benefit Payments [Table Text Block]	The following benefit payments, which reflect expected future service as appropriate, are expected to be paid (dollars in millions): Pension Benefits Other Benefits 2021 $ 11 $ 2 2022 14 2 2023 14 2 2024 15 2 2025 16 3 2026-2030 92 18
Defined Benefit Plan, Assumptions [Table Text Block]	Weighted average assumptions used to determine the accumulated benefit obligation and net benefit cost or income were as follows: Pension Benefits Other Benefits 2020 2019 2018 2020 2019 2018 Discount rate used to determine benefit obligation 2.22 % 3.05 % 4.02 % 2.41 % 3.17 % 4.17 % Discount rate used to determine net benefit cost or income 3.03 % 4.03 % 3.41 % 3.17 % 4.17 % 3.56 % Expected long-term rate of return on plan assets 7.00 % 7.00 % 7.35 % — % — % — % Rate of compensation increases 4.69 % 4.61 % 4.17 % — % — % — %
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]	The assumed health care cost trend rates used in measuring the accumulated non-pension post-retirement benefit obligation were as follows: As of December 31, 2020 2019 Health care cost trend rates assumed for next year 7.00 % 8.00 % Ultimate cost trend rate 4.50 % 4.50 % Year that the rate reaches the ultimate trend rate 2026 2026
Schedule of Allocation of Plan Assets [Table Text Block]	The fair values of the Company’s qualified pension plan assets as of December 31, 2020 and 2019 are summarized below (dollars in millions): December 31, 2020 Fair Value Measurement Using: Total Level 1 Level 2 Level 3 Mutual Funds (1) $ 157 $ 157 $ — $ — Cash — — — — Total $ 157 $ 157 $ — $ — (1) Mutual funds were invested 27% in U.S. equity funds, 39% in U.S. fixed income funds, 18% in non-U.S. equity funds and 16% in other. December 31, 2019 Fair Value Measurement Using: Total Level 1 Level 2 Level 3 Mutual Funds (2) $ 133 $ 133 $ — $ — Cash — — — — Total $ 133 $ 133 $ — $ — (2) Mutual funds were invested 27% in U.S. equity funds, 39% in U.S. fixed income funds, 18% in non-U.S. equity funds and 16% in other.

Financial Condition and Net I_2

Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries (Tables)	12 Months Ended
	Dec. 31, 2020
Statutory Basis [Abstract]
Statutory Accounting Practices Disclosure [Table Text Block]	Statutory net income, and capital and surplus of the Company’s insurance subsidiaries, determined in accordance with statutory accounting practices prescribed by the applicable state insurance department or local regulatory authority are as follows (dollars in millions): Statutory Capital & Surplus Statutory Net Income (Loss) 2020 2019 2020 2019 2018 RGA Americas Reinsurance Company, Ltd. $ 8,249 $ 6,283 $ 879 $ 1,049 $ 209 Reinsurance Company of Missouri 2,136 2,125 4 75 (25) RGA Reinsurance (U.S.) 2,131 2,150 (133) 280 660 RGA Reinsurance Company (Barbados) Ltd. 1,835 1,553 268 234 49 RGA International Reinsurance Company dac 1,460 1,087 52 37 21 RGA Atlantic Reinsurance Company Ltd. 1,441 1,511 175 243 256 RGA Life Reinsurance Company of Canada 886 713 152 (225) (38) RGA Australia 535 447 42 15 (37) Other insurance subsidiaries 2,496 2,233 357 291 324
Reconciliation Of NAIC SAP And Prescribed Practice [Text Block]	A reconciliation of the Company’s surplus between NAIC SAP and practices prescribed by the state of domicile is shown below (dollars in millions): December 31, 2020 2019 Prescribed practice – surplus note $ 577 $ 652 Prescribed practice – letters of credit (461) (576) Surplus (deficit) – NAIC SAP $ 116 $ 76

Commitments Contingencies and_2

Commitments Contingencies and Guarantees (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]	The Company’s commitments to fund investments as of December 31, 2020 and 2019 are presented in the following table (dollars in millions): 2020 2019 Limited partnership interests and joint ventures $ 678 $ 685 Mortgage loans on real estate 199 243 Bank loans and private placements 194 181 Lifetime mortgages 43 87
Other Commitments [Table Text Block]	The following table presents the maximum potential obligation for these commitments as of December 31, 2020 (dollars in millions): Commitment Period Maximum Potential Obligation 2034 $ 1,243 2035 2,666 2036 3,599 2037 2,850 2038 2,300 2039 11,350
Schedule of Guarantor Obligations [Table Text Block]	RGA’s guarantees issued as of December 31, 2020 and 2019 are reflected in the following table (dollars in millions): 2020 2019 Treaty guarantees $ 1,934 $ 1,821 Treaty guarantees, net of assets in trust 961 891 Securities borrowing and repurchase arrangements 133 275 Financing arrangements — 42

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table Text Block]	The Company’s long-term debt consists of the following as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 $400 million 5.00% Senior Notes due 2021 $ 400 $ 400 $400 million 4.70% Senior Notes due 2023 399 399 $400 million 3.95% Senior Notes due 2026 400 400 $600 million 3.90% Senior Notes due 2029 599 599 $600 million 3.15% Senior Notes due 2030 597 — $100 million 4.09% Promissory Note due 2039 83 86 $400 million 6.20% Subordinated Debentures due 2042 400 400 $400 million 5.75% Subordinated Debentures due 2056 400 400 $400 million Variable Rate Junior Subordinated Debentures due 2065 319 319 Sub-total 3,597 3,003 Unamortized issuance costs (24) (22) Long-term Debt $ 3,573 $ 2,981
Schedule of Maturities of Long-term Debt [Table Text Block]	Future principal payments due on long-term debt, excluding discounts, as of December 31, 2020, were as follows (dollars in millions): Calendar Year 2021 2022 2023 2024 2025 Thereafter Long-term debt $ 403 $ 3 $ 403 $ 3 $ 4 $ 2,787
Schedule of Line of Credit Facilities [Table Text Block]	The following table provides additional information on the Company’s existing committed credit facilities as of December 31, 2020 and 2019 (dollars in millions): Amount Utilized (1) December 31, Current Capacity Maturity Date 2020 2019 Basis of Fees $ 75 June 2021 $ 51 $ 15 Fixed 100 August 2021 100 — Fixed 150 September 2021 150 — Fixed 107 March 2022 107 99 Fixed 500 May 2022 210 375 Debt rating and utilization % 100 (2) December 2022 100 105 Fixed 100 May 2023 75 61 Fixed 850 August 2023 21 20 Senior unsecured long-term debt rating (1) Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented. (2) Foreign currency denominated facility, amounts presented are in U.S. dollars.

Collateral Finance and Securi_2

Collateral Finance and Securitization Notes Collateral Finance and Securitization Notes (Tables)	12 Months Ended
	Dec. 31, 2020
Collateralized Financings [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	The Company’s collateral finance and securitization notes consist of the following as of December 31, 2020 and 2019 (dollars in millions): 2020 2019 Timberlake Financial $ 247 $ 313 RGA Barbados — 127 Chesterfield Financial 143 161 Unamortized issuance costs (2) (3) Total $ 388 $ 598

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	For the years ended December 31, 2020 2019 2018 Revenues: U.S. and Latin America: Traditional $ 6,560 $ 6,500 $ 6,296 Financial Solutions 1,220 1,279 907 Total 7,780 7,779 7,203 Canada: Traditional 1,260 1,286 1,224 Financial Solutions 92 99 49 Total 1,352 1,385 1,273 Europe, Middle East and Africa: Traditional 1,633 1,520 1,495 Financial Solutions 471 450 350 Total 2,104 1,970 1,845 Asia Pacific: Traditional 2,806 2,681 2,417 Financial Solutions 309 228 54 Total 3,115 2,909 2,471 Corporate and Other 245 257 84 Total $ 14,596 $ 14,300 $ 12,876
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	For the years ended December 31, 2020 2019 2018 Income (loss) before income taxes: U.S. and Latin America: Traditional $ (298) $ 265 $ 286 Financial Solutions 295 398 251 Total (3) 663 537 Canada: Traditional 134 168 112 Financial Solutions 21 15 10 Total 155 183 122 Europe, Middle East and Africa: Traditional 27 80 55 Financial Solutions 258 223 197 Total 285 303 252 Asia Pacific: Traditional 174 105 178 Financial Solutions 59 23 (6) Total 233 128 172 Corporate and Other (117) (145) (237) Total $ 553 $ 1,132 $ 846
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block]	For the years ended December 31, 2020 2019 2018 Interest expense: Corporate and Other $ 170 $ 173 $ 147 Total $ 170 $ 173 $ 147 For the years ended December 31, 2020 2019 2018 Depreciation and amortization: U.S. and Latin America: Traditional $ 291 $ 291 $ 273 Financial Solutions 90 143 95 Total 381 434 368 Canada: Traditional 24 20 22 Financial Solutions — — — Total 24 20 22 Europe, Middle East and Africa: Traditional 46 56 45 Financial Solutions 1 1 — Total 47 57 45 Asia Pacific: Traditional 94 60 115 Financial Solutions 20 16 2 Total 114 76 117 Corporate and Other 23 22 22 Total $ 589 $ 609 $ 574
Reconciliation of Assets from Segment to Consolidated [Table Text Block]	The table above includes amortization of DAC, including the effect from investment related gains and losses. For the years ended December 31, 2020 2019 Assets: U.S. and Latin America: Traditional $ 20,071 $ 19,353 Financial Solutions 25,433 25,117 Total 45,504 44,470 Canada: Traditional 4,682 4,361 Financial Solutions 13 64 Total 4,695 4,425 Europe, Middle East and Africa: Traditional 4,763 4,032 Financial Solutions 7,292 6,502 Total 12,055 10,534 Asia Pacific: Traditional 8,197 6,800 Financial Solutions 4,299 2,557 Total 12,496 9,357 Corporate and Other 9,906 7,945 Total $ 84,656 $ 76,731

Policy Claims and Benefits (Tab

Policy Claims and Benefits (Tables)	12 Months Ended
	Dec. 31, 2020
Insurance [Abstract]
Short-duration Insurance Contracts, Claims Development [Table Text Block]	U.S. and Latin America As of (dollars in millions) December 31, 2020 Incurred Claims and Allocated Claim Adjustments, Net of Reinsurance (1) Total of Incurred-but-Not-Reported Liabilities Plus Expected Development on Reported Claims Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 323 $ 309 $ 297 $ 298 $ 299 $ 298 $ 297 $ 297 $ 296 $ — 2013 349 333 339 337 336 336 337 335 — 2014 408 411 396 397 396 399 399 — 2015 460 461 465 462 462 463 — 2016 501 500 501 497 497 — 2017 485 514 509 504 3 2018 538 538 524 8 2019 491 473 30 2020 469 197 Total $ 3,960 Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance (1) Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 109 $ 222 $ 244 $ 252 $ 258 $ 264 $ 268 $ 272 $ 275 2013 114 249 277 286 292 297 302 305 2014 129 305 337 349 356 364 368 2015 146 361 407 422 431 437 2016 185 393 437 451 460 2017 190 403 448 462 2018 183 415 465 2019 180 372 2020 159 Total $ 3,303 All outstanding claims prior to 2012, net of reinsurance 131 Liabilities for claims and claim adjustment expense, net of reinsurance $ 788 (1) 2012-2019 Unaudited. Asia Pacific As of (dollars in millions) December 31, 2020 Incurred Claims and Allocated Claim Adjustments, Net of Reinsurance (1) Total of Incurred-but-Not-Reported Liabilities Plus Expected Development on Reported Claims Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 227 $ 305 $ 309 $ 313 $ 321 $ 332 $ 338 $ 343 $ 345 $ 5 2013 320 342 332 329 343 358 361 359 7 2014 302 328 290 296 310 312 313 9 2015 304 281 273 292 291 292 14 2016 248 225 232 240 240 15 2017 232 234 234 237 21 2018 277 295 290 50 2019 277 286 82 2020 163 84 Total $ 2,525 Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net of Reinsurance (1) Accident Year For the Years Ended December 31, 2012 2013 2014 2015 2016 2017 2018 2019 2020 2012 $ 54 $ 148 $ 202 $ 243 $ 266 $ 284 $ 300 $ 310 $ 318 2013 54 157 229 258 285 309 322 332 2014 38 148 194 225 250 265 276 2015 53 129 183 221 242 255 2016 42 107 145 167 182 2017 39 95 126 149 2018 35 116 160 2019 42 111 2020 26 Total $ 1,809 All outstanding claims prior to 2012, net of reinsurance 90 Liabilities for claims and claim adjustment expense, net of reinsurance $ 806 (1) 2012-2019 Unaudited.
Short-duration Insurance Contracts, Schedule of Historical Claims Duration [Table Text Block]	The following is unaudited supplementary information about average historical claims duration as of December 31, 2020: Average Annual Payout of Incurred Claims by Age, Net of Reinsurance Years 1 2 3 4 5 6 7 8 9 U.S. and Latin America 35.2 % 42.2 % 8.8 % 2.9 % 1.9 % 1.6 % 1.3 % 1.2 % 1.2 % Asia Pacific 15.2 % 27.6 % 16.1 % 10.3 % 7.2 % 5.3 % 4.0 % 2.8 % 2.4 %
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table Text Block]	The reconciliation of the net incurred and paid claims development tables to the liability for claims and claim adjustment expense in the consolidated balance sheet as of December 31, 2020, is as follows (dollars in millions): 2020 Liabilities for claims and claim adjustment expense, net of reinsurance: U.S. and Latin America $ 788 Asia Pacific 806 Liabilities for claims and claim adjustment expense, net of reinsurance 1,594 Adjustments to reconcile to total policy claims and future policy benefits: Reinsurance recoverable 12 Effect of discounting (120) Unallocated claims adjustment expense 7 Total adjustments (101) Other short-duration contracts: Canada 90 Europe, Middle East and Africa 587 Other 277 Liability for unpaid claims and claim adjustment expense – short-duration 2,447 Liability for unpaid claims and claim adjustment expense – long-duration 5,109 Total liability for unpaid claims and claim adjustment expense (included in future policy benefits and other policy-related balances) $ 7,556
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]	The liability for unpaid claims is reported in future policy benefits and other policy-related balances within the Company’s consolidated balance sheets. Activity associated with unpaid claims is summarized below (dollars in millions): 2020 2019 2018 Balance at beginning of year $ 6,786 $ 6,585 $ 5,896 Less: reinsurance recoverable (564) (433) (456) Net balance at beginning of year 6,222 6,152 5,440 Incurred: Current year 11,195 10,307 10,049 Prior years 123 154 131 Total incurred 11,318 10,461 10,180 Payments: Current year (5,617) (5,140) (4,602) Prior years (5,204) (5,305) (4,692) Total payments (10,821) (10,445) (9,294) Other changes: Interest accretion 36 33 25 Foreign exchange adjustments 160 21 (199) Total other changes 196 54 (174) Net balance at end of year 6,915 6,222 6,152 Plus: reinsurance recoverable 641 564 433 Balance at end of year $ 7,556 $ 6,786 $ 6,585

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Schedule of Stock by Class [Table Text Block]	The changes in number of common stock shares, issued, held in treasury and outstanding are as follows for the periods indicated: Issued Held In Treasury Outstanding Balance, December 31, 2017 79,137,758 14,685,663 64,452,095 Common Stock acquired — 1,932,055 (1,932,055) Stock-based compensation (1) — (294,328) 294,328 Balance, December 31, 2018 79,137,758 16,323,390 62,814,368 Common Stock acquired — 546,614 (546,614) Stock-based compensation (1) — (388,348) 388,348 Balance, December 31, 2019 79,137,758 16,481,656 62,656,102 Equity offering 6,172,840 — 6,172,840 Common Stock acquired — 1,074,413 (1,074,413) Stock-based compensation (1) — (202,372) 202,372 Balance, December 31, 2020 85,310,598 17,353,697 67,956,901 (1) Represents net shares issued from treasury pursuant to the Company’s stock-based compensation programs.
Class of Treasury Stock [Table Text Block]	The following table summarizes the Company’s current share repurchase program activity for the year ended 2020 (dollar amounts in millions, except for the number of shares and per share amounts): Year of Repurchase Shares Repurchased Amount Paid Average Per Share 2020 1,074,413 $ 153 $ 142.05 2019 546,614 $ 80 $ 146.00
Schedule of Comprehensive Income (Loss) [Table Text Block]	Accumulated Other Comprehensive Income (Loss) The following table presents the components of the Company’s other comprehensive income (loss) for the years ended December 31, 2020, 2019 and 2018 (dollars in millions): For the year ended December 31, 2020: Before-Tax Amount Tax (Expense) Benefit After-Tax Amount Foreign currency translation adjustments: Change arising during year $ 43 $ 3 $ 46 Foreign currency swap (29) 6 (23) Net foreign currency translation adjustments 14 9 23 Unrealized gains on investments: (1) Unrealized net holding gains arising during the year 2,812 (614) 2,198 Less: Reclassification adjustment for net gains realized in net income (8) (1) (9) Net unrealized gains 2,820 (613) 2,207 Change in impairments on fixed maturity securities (8) 2 (6) Unrealized pension and postretirement benefits: Net prior service cost arising during the year (1) — (1) Net gain (loss) arising during the period (2) 1 (1) Unrealized pension and postretirement benefits, net (3) 1 (2) Other comprehensive income (loss) $ 2,823 $ (601) $ 2,222 For the year ended December 31, 2019: Before-Tax Amount Tax (Expense) Benefit After-Tax Amount Foreign currency translation adjustments: Change arising during year $ 113 $ (10) $ 103 Foreign currency swap (33) 7 (26) Net foreign currency translation adjustments 80 (3) 77 Unrealized gains on investments: (1) Unrealized net holding gains arising during the year 3,208 (698) 2,510 Less: Reclassification adjustment for net gains realized in net income 84 (17) 67 Net unrealized gains 3,124 (681) 2,443 Change in impairments on fixed maturity securities — — — Unrealized pension and postretirement benefits: Net prior service cost arising during the year (1) — (1) Net gain arising during the period (23) 5 (18) Unrealized pension and postretirement benefits, net (24) 5 (19) Other comprehensive income (loss) $ 3,180 $ (679) $ 2,501 For the year ended December 31, 2018: Before-Tax Amount Tax (Expense) Benefit After-Tax Amount Foreign currency translation adjustments: Change arising during year $ (148) $ (1) $ (149) Foreign currency swap 87 (18) 69 Net foreign currency translation adjustments (61) (19) (80) Unrealized gains on investments: (1) Unrealized net holding gains arising during the year (1,834) 394 (1,440) Less: Reclassification adjustment for net gains realized in net income (122) 26 (96) Net unrealized gains (1,712) 368 (1,344) Change in impairments on fixed maturity securities — — — Unrealized pension and postretirement benefits: Net prior service cost arising during the year (1) — (1) Net gain arising during the period 1 — 1 Unrealized pension and postretirement benefits, net — — — Other comprehensive income (loss) $ (1,773) $ 349 $ (1,424) (1) Includes cash flow hedges. See Note 5 for additional information on cash flow hedges.
Components Of Accumulated Other Comprehensive Income [Table Text Block]	A summary of the components of net unrealized appreciation (depreciation) of balances carried at fair value is as follows (dollars in millions): For the years ended December 31, 2020 2019 2018 Change in net unrealized appreciation (depreciation) on: Fixed maturity securities available-for-sale $ 2,837 $ 3,258 $ (1,759) Other investments (1) 29 (37) 20 Effect on unrealized appreciation on: Deferred policy acquisition costs (54) (98) 27 Net unrealized appreciation (depreciation) $ 2,812 $ 3,123 $ (1,712) (1) Includes cash flow hedges. See Note 5 for additional information on cash flow hedges.
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The balance of and changes in each component of AOCI were as follows (dollars in millions): Accumulated Unrealized Appreciation (Depreciation) of Investments (1) Pension and Accumulated Balance, December 31, 2017 (86) 2,201 (51) 2,064 OCI before reclassifications (60) (1,861) (5) (1,926) Amounts reclassified from AOCI — 148 5 153 Deferred income tax benefit (expense) (19) 368 — 349 Adoption of new accounting standard (4) — — (4) Balance, December 31, 2018 (169) 856 (51) 636 OCI before reclassifications 80 3,306 (28) 3,358 Amounts reclassified from AOCI — (182) 4 (178) Deferred income tax benefit (expense) (3) (681) 5 (679) Balance, December 31, 2019 (92) 3,299 (70) 3,137 OCI before reclassifications 14 2,854 (9) 2,859 Amounts reclassified from AOCI — (42) 6 (36) Deferred income tax benefit (expense) 9 (611) 1 (601) Balance, December 31, 2020 $ (69) $ 5,500 $ (72) $ 5,359 (1) Includes cash flow hedges of $(49), $(26) and $9 as of December 31, 2020, 2019 and 2018, respectively. See Note 5 for additional information on cash flow hedges.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	The following table presents the amounts of AOCI reclassifications for the years ended December 31, 2020 and 2019 (dollars in millions): Amount Reclassified from AOCI Details about AOCI Components 2020 2019 Affected Line Item in Net unrealized investment gains (losses): Net unrealized gains and losses on available-for-sale securities $ (8) $ 84 Investment related gains (losses), net Cash flow hedges – Interest rate (4) 1 (1) Cash flow hedges – Currency/Interest rate — — (1) Cash flow hedges – Forward bond purchase commitments — — (1) Deferred policy acquisition costs attributed to unrealized gains and losses 54 97 (2) Total 42 182 Provision for income taxes (12) (38) Net unrealized gains (losses), net of tax $ 30 $ 144 Amortization of defined benefit plan items: Prior service cost (credit) $ 1 $ 1 (3) Actuarial gains/(losses) (7) (5) (3) Total (6) (4) Provision for income taxes 1 1 Amortization of defined benefit plans, net of tax $ (5) $ (3) Total reclassifications for the period $ 25 $ 141 (1) See Note 5 for information on cash flow hedges. (2) See Note 8 for information on deferred policy acquisition costs. (3) See Note 10 for information on employee benefit plans.

Equity Based Compensation (Tabl

Equity Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2020
Share-based Payment Arrangement [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	The following table presents a summary of stock option and SAR activity: Number of Options and SARs Weighted-Average Exercise/Conversion Price Aggregate Intrinsic Value (in millions) Outstanding at December 31, 2019 2,031,797 $ 92.63 Granted 455,455 $ 117.96 Exercised (312,345) $ 61.70 Forfeited (6,512) $ 126.50 Outstanding at December 31, 2020 2,168,395 $ 102.30 $ 43.5 Awards exercisable 1,695,704 $ 95.68 $ 43.5
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]	Awards Outstanding Awards Exercisable Range of Exercise Prices Number Outstanding as Weighted-Average Weighted- Number Weighted-Average $50.00 - $89.99 503,239 2.0 $ 62.41 503,239 $ 62.41 $90.00 - $99.99 711,645 4.8 $ 92.55 711,645 $ 92.55 $100.00 - $139.99 608,599 8.4 $ 120.90 269,284 $ 124.74 $140.00 + 344,912 7.7 $ 147.80 211,536 $ 148.37 Totals 2,168,395 5.6 $ 102.30 1,695,704 $ 95.68
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	The following table presents the weighted average assumptions used to determine the fair value of SARs issued: For the years ended December 31, 2020 2019 2018 Dividend yield 2.37 % 1.65 % 1.33 % Risk-free rate of return 0.69 % 2.67 % 2.79 % Expected volatility 18.8 % 18.2 % 21.4 % Expected life (years) 7.0 6.0 7.0 Weighted average exercise price of stock options granted $ 117.85 $ 145.25 $ 150.87 Weighted average fair value of stock options granted $ 15.14 $ 26.59 $ 36.31
Share-based Payment Arrangement, Activity [Table Text Block]	The following table presents a summary of Performance Share and Restricted Stock Unit activity: Performance Contingent Units Restricted Stock Units Outstanding at December 31, 2019 325,851 62,194 Granted 175,047 37,135 Change in units based on performance factor (67,847) — Paid (138,785) (20,232) Forfeited (3,137) (2,707) Outstanding at December 31, 2020 (1) 291,129 76,390 (1) Amount outstanding at December 31, 2020, includes the amount of shares to be issued under RSUs expected to vest and number of shares to be issued under PCUs at target performance. The PCU amount of shares do not reflect potential increases or decreases that may result from the performance factor, except for the 2018 – 2020 PCU grants, which vested as of December 31, 2020.

Quarterly Results of Operatio_2

Quarterly Results of Operations (Tables)	12 Months Ended
	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]	QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) Years Ended December 31, (in millions, except per share data) Three Months Ended 2020 March 31, June 30, September 30, December 31, Total Revenues $ 3,204 $ 3,606 $ 3,643 $ 4,143 Total benefits and expenses 3,300 3,411 3,358 3,974 Income before income taxes (96) 195 285 169 Net Income (88) 158 213 132 Earnings Per Share: Basic earnings per share $ (1.41) $ 2.49 $ 3.13 $ 1.95 Diluted earnings per share (1.41) 2.48 3.12 1.94 2019 March 31, June 30, September 30, December 31, Total Revenues $ 3,420 $ 3,467 $ 3,628 $ 3,785 Total benefits and expenses 3,203 3,207 3,281 3,477 Income before income taxes 217 260 347 308 Net Income 170 202 263 235 Earnings Per Share: Basic earnings per share $ 2.70 $ 3.23 $ 4.19 $ 3.75 Diluted earnings per share 2.65 3.18 4.12 3.68

Summary of Investments Other _2

Summary of Investments Other Than Investments in Related Parties (Tables)	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]
Summary Of Investments Other Than Investments In Related Parties [Table Text Block]	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE I-SUMMARY OF INVESTMENTS-OTHER THAN INVESTMENTS IN RELATED PARTIES December 31, 2020 (in millions) Type of Investment Amortized Cost Estimated Fair Value Amount at Which Shown in the Balance Sheets (1) Fixed maturity securities: United States government and government agencies and authorities $ 1,242 $ 1,437 $ 1,437 State and political subdivisions 1,237 1,390 1,390 Foreign governments (2) 8,482 10,923 10,923 Public utilities 3,904 4,537 4,537 Mortgage-backed and asset-backed securities 6,624 6,777 6,777 All other corporate bonds 28,059 31,671 31,671 Total fixed maturity securities $ 49,548 $ 56,735 $ 56,735 Equity securities $ 155 $ 132 $ 132 Mortgage loans on real estate 5,787 5,787 Policy loans 1,258 1,258 Funds withheld at interest 5,432 5,432 Short-term investments 227 227 Other invested assets 2,829 2,829 Total investments $ 65,236 $ 72,400 (1) Fixed maturity securities are classified as available-for-sale and carried at fair value. (2) Includes fixed maturities directly issued by foreign governments, supranational and foreign government-sponsored enterprises.

Condensed Financial Informati_2

Condensed Financial Information of The Registrant (Tables)	12 Months Ended
	Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Statements [Table Text Block]	2020 2019 2018 CONDENSED BALANCE SHEETS Assets: Fixed maturity securities available-for-sale, at fair value $ 642 $ 525 Short-term and other investments 172 19 Cash and cash equivalents 494 10 Investment in subsidiaries 16,937 14,486 Loans to subsidiaries 1,010 1,010 Other assets 326 270 Total assets $ 19,581 $ 16,320 Liabilities and stockholders’ equity: Long-term debt – unaffiliated (1) $ 3,569 $ 2,974 Long-term debt – affiliated (2) 500 500 Other liabilities 1,160 1,244 Stockholders’ equity 14,352 11,602 Total liabilities and stockholders’ equity $ 19,581 $ 16,320 CONDENSED STATEMENTS OF INCOME Interest / dividend income (3) $ 472 $ 308 $ 576 Investment related gains (losses), net 14 4 (5) Operating expenses (59) (55) (36) Interest expense (202) (206) (181) Income (loss) before income tax and undistributed earnings of subsidiaries 225 51 354 Income tax expense (benefit) (21) (33) (37) Net income (loss) before undistributed earnings of subsidiaries 246 84 391 Equity in undistributed earnings of subsidiaries 169 786 325 Net income 415 870 716 Other comprehensive income (loss) (29) (33) 21 Total comprehensive income $ 386 $ 837 $ 737 The condensed financial information of RGA (the “Parent Company”) should be read in conjunction with the consolidated financial statements of RGA and its subsidiaries and the notes thereto (the “Consolidated Financial Statements”). These condensed unconsolidated financial statements reflect the results of operations, financial position and cash flows for RGA. Investments in subsidiaries are accounted for using the equity method of accounting. (1) Long-term debt – unaffiliated consists of the following: 2020 2019 $400 million 5.00% Senior Notes due 2021 $ 400 $ 400 $400 million 4.70% Senior Notes due 2023 399 399 $400 million 3.95% Senior Notes due 2026 400 400 $600 million 3.90% Senior Notes due 2029 599 599 $600 million 3.15% Senior Notes due 2030 598 — $400 million 6.20% Subordinated Debentures due 2042 400 400 $400 million 5.75% Subordinated Debentures due 2056 400 400 $400 million Variable Rate Junior Subordinated Debentures due 2065 398 398 Subtotal 3,594 2,996 Unamortized debt issuance costs (25) (22) Total $ 3,569 $ 2,974 (2) Long-term debt – affiliated in 2020 and 2019 consists of $500 million of subordinated debt issued to various operating subsidiaries. (3) Interest/dividend income includes $340 million and $175 million of cash dividends received from consolidated subsidiaries in 2020 and 2019, respectively. REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE II—CONDENSED FINANCIAL INFORMATION OF THE REGISTRANT (continued) December 31, (in millions) 2020 2019 2018 CONDENSED STATEMENTS OF CASH FLOWS Operating activities: Net income $ 415 $ 870 $ 716 Equity in earnings of subsidiaries (169) (786) (325) Other, net (170) 72 37 Net cash provided by operating activities 76 156 428 Investing activities: Sales of fixed maturity securities available-for-sale 358 576 482 Purchases of fixed maturity securities available-for-sale (400) (494) (383) Change in short-term investments (165) — — Change in other invested assets (26) — — Capital contributions to subsidiaries (78) (96) (82) Net cash (used in) provided by investing activities (311) (14) 17 Financing activities: Dividends to stockholders (182) (163) (140) Proceeds from issuance of common stock, net 481 — — Purchases of treasury stock (163) (101) (300) Exercise of stock options, net 1 6 3 Change in cash collateral for derivative positions and other arrangements (11) (92) (2) Principal payments on debt — (397) — Proceeds from unaffiliated long-term debt issuance 598 599 — Debt issuance costs (5) (5) — Net cash provided by (used in) financing activities 719 (153) (439) Change in cash and cash equivalents 484 (11) 6 Cash and cash equivalents, beginning of period 10 21 15 Cash and cash equivalents, end of period $ 494 $ 10 $ 21 Supplementary information: Interest paid $ 187 $ 192 $ 176 Income taxes paid, net of refunds $ 23 $ 9 $ 93

Supplementary Insurance Infor_2

Supplementary Insurance Information (Tables)	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]
Supplementary Insurance Information For Insurance Companies Disclosure [Table Text Block]	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE III—SUPPLEMENTARY INSURANCE INFORMATION (in millions) As of December 31, Deferred Policy Future Policy Benefits and Other Policy Claims and 2020 U.S. and Latin America: Traditional $ 1,816 $ 12,245 $ 2,578 Financial Solutions 255 23,104 18 Canada: Traditional 195 3,474 292 Financial Solutions — 16 4 Europe, Middle East and Africa: Traditional 264 1,379 1,389 Financial Solutions — 5,881 66 Asia Pacific: Traditional 1,045 3,568 2,059 Financial Solutions 41 4,187 2 Corporate and Other — 875 5 Total $ 3,616 $ 54,729 $ 6,413 2019 U.S. and Latin America: Traditional $ 1,806 $ 11,969 $ 2,143 Financial Solutions 313 23,728 18 Canada: Traditional 200 3,260 219 Financial Solutions — 23 42 Europe, Middle East and Africa: Traditional 250 1,197 1,109 Financial Solutions — 5,703 51 Asia Pacific: Traditional 927 2,837 2,121 Financial Solutions 16 2,215 2 Corporate and Other — 451 6 Total $ 3,512 $ 51,383 $ 5,711 REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE III—SUPPLEMENTARY INSURANCE INFORMATION (continued) (in millions) Year ended December 31, Premium Income Net Investment Policyholder Amortization of Other Expenses (1) 2020 U.S. and Latin America: Traditional $ 5,838 $ 714 $ 5,979 $ 200 $ 679 Financial Solutions 53 999 764 52 109 Canada: Traditional 1,052 207 909 16 201 Financial Solutions 83 1 68 — 3 Europe, Middle East and Africa: Traditional 1,555 72 1,389 31 186 Financial Solutions 252 193 163 — 50 Asia Pacific: Traditional 2,681 107 2,293 65 274 Financial Solutions 180 85 206 19 25 Corporate and Other — 197 8 — 354 Total $ 11,694 $ 2,575 $ 11,779 $ 383 $ 1,881 2019 U.S. and Latin America: Traditional $ 5,729 $ 769 $ 5,339 $ 199 $ 697 Financial Solutions 39 931 737 31 113 Canada: Traditional 1,066 205 857 12 249 Financial Solutions 89 3 80 — 4 Europe, Middle East and Africa: Traditional 1,442 73 1,205 36 199 Financial Solutions 218 195 175 — 52 Asia Pacific: Traditional 2,568 104 2,317 36 223 Financial Solutions 146 46 162 16 27 Corporate and Other — 194 22 — 380 Total $ 11,297 $ 2,520 $ 10,894 $ 330 $ 1,944 2018 U.S. and Latin America: Traditional $ 5,534 $ 730 $ 5,131 $ 180 $ 698 Financial Solutions 27 706 442 109 106 Canada: Traditional 1,024 199 848 13 251 Financial Solutions 43 2 37 — 2 Europe, Middle East and Africa: Traditional 1,424 66 1,233 27 179 Financial Solutions 195 134 116 — 37 Asia Pacific: Traditional 2,296 96 1,885 92 262 Financial Solutions 1 40 40 2 19 Corporate and Other — 166 12 — 308 Total $ 10,544 $ 2,139 $ 9,744 $ 423 $ 1,862 (1) Includes policy acquisition costs and other insurance expenses, excluding amortization of DAC. Also includes other operating expenses, interest expense, and collateral finance and securitization expense.

Supplemental Schedule of Rein_2

Supplemental Schedule of Reinsurance (Tables)	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Supplemental Schedule Of Reinsurance Premiums For Insurance Companies [Table Text Block]	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE IV—REINSURANCE (in millions) As of or for the Year ended December 31, Gross Amount Ceded to Other Assumed from Net Amounts Percentage of 2020 Life insurance in force $ 1,990 $ 184,625 $ 3,480,692 $ 3,298,057 105.5 % Premiums U.S. and Latin America: Traditional $ 23 $ 585 $ 6,399 $ 5,837 109.6 % Financial Solutions 3 — 50 $ 53 94.3 Canada: Traditional — 54 1,106 $ 1,052 105.1 Financial Solutions — — 83 $ 83 100.0 Europe, Middle East and Africa: Traditional 32 24 1,548 $ 1,556 99.5 Financial Solutions — 178 430 $ 252 170.6 Asia Pacific: Traditional — 106 2,787 $ 2,681 104.0 Financial Solutions — — 180 $ 180 100.0 Total $ 58 $ 947 $ 12,583 $ 11,694 107.6 2019 Life insurance in force $ 1,316 $ 192,864 $ 3,480,206 $ 3,288,658 105.8 % Premiums U.S. and Latin America: Traditional $ 29 $ 591 $ 6,291 5,729 109.8 % Financial Solutions 2 — 37 39 95.4 Canada: Traditional — 54 1,120 1,066 105.0 Financial Solutions — — 89 89 100.0 Europe, Middle East and Africa: Traditional 45 52 1,449 1,442 100.6 Financial Solutions — 148 366 218 167.9 Asia Pacific: Traditional — 84 2,652 2,568 103.2 Financial Solutions — — 146 146 100.0 Total $ 76 $ 929 $ 12,150 $ 11,297 107.5 2018 Life insurance in force $ 1,363 $ 186,172 $ 3,329,181 $ 3,144,372 105.9 % Premiums U.S. and Latin America: Traditional $ 32 $ 593 $ 6,095 $ 5,534 110.2 % Financial Solutions 5 — 22 27 82.7 Canada: Traditional — 47 1,071 1,024 104.6 Financial Solutions — — 43 43 100.0 Europe, Middle East and Africa: Traditional 26 26 1,424 1,424 100.0 Financial Solutions — 144 339 195 173.5 Asia Pacific: Traditional — 50 2,346 2,296 102.2 Financial Solutions — — 1 1 100.0 Total $ 63 $ 860 $ 11,341 $ 10,544 107.6

Valuation and Qualifying Acco_2

Valuation and Qualifying Accounts (Tables)	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Valuation And Qualifying Accounts [Table Text Block]	REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE V—VALUATION AND QUALIFYING ACCOUNTS (in millions) Additions Description Balance at Charged to Costs Charged to Other Deductions Balance at End of Period 2020 Valuation allowance for deferred income taxes $ 236 $ (4) $ 19 $ — $ 251 Valuation allowance for mortgage loans (1) 12 38 14 — 64 Valuation allowance for fixed maturity securities available-for-sale — 41 — 21 20 2019 Valuation allowance for deferred income taxes $ 181 $ 56 $ (1) $ — $ 236 Valuation allowance for mortgage loans 11 1 — — 12 2018 Valuation allowance for deferred income taxes $ 227 $ (34) $ (12) $ — $ 181 Valuation allowance for mortgage loans 9 2 — — 11 (1) Upon adoption of Financial Instruments – Credits Losses on January 1, 2020, the Company increased the valuation allowance for mortgage loans by $14 million. The increase was reflected as a decrease to opening retained earnings, net of income taxes.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Document Period End Date	Dec. 31, 2020
Property, Plant and Equipment, Useful Life	40 years
Other Asset Impairment Charges	$ 5	$ 4	$ 5
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	116	99
Property, Plant and Equipment, Gross	260	244
Depreciation	17	18	18
Goodwill	7
Present Value of Future Insurance Profits, Net	4	5
Amortization of Value of Business Acquired (VOBA)	0.5	0.7	0.4
Values Of Business Acquired Distribution Agreements And Customer Relationships	25	33
Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships	96	88
Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships	8	8	8
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	7
Finite-Lived Intangible Assets, Amortization Expense, Year Two	6
Finite-Lived Intangible Assets, Amortization Expense, Year Three	6
Finite-Lived Intangible Assets, Amortization Expense, Year Four	6
Capitalized Computer Software, Net	147	151
Capitalized Computer Software, Amortization	$ 32	31	$ 27
Value of Customer Relationships Acquired [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Value of Distribution Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships	$ 12	$ 8
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	4
Finite-Lived Intangible Assets, Amortization Expense, Year Two	4
Finite-Lived Intangible Assets, Amortization Expense, Year Three	4
Finite-Lived Intangible Assets, Amortization Expense, Year Four	4
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 4
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Collateral Obtained Percent Of Fair Value Reverse Repurchase Agreements	100.00%
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Collateral Obtained Percent Of Fair Value Reverse Repurchase Agreements	105.00%

Summary of Significant Accoun_4

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Future Policy Benefits) (Narrative) (Details)	Dec. 31, 2020
Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	6.00%
Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate	3.00%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Intangible Assets) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships	$ 96	$ 88
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	7
Finite-Lived Intangible Assets, Amortization Expense, Year Two	6
Finite-Lived Intangible Assets, Amortization Expense, Year Three	6
Finite-Lived Intangible Assets, Amortization Expense, Year Four	6
Present Value of Future Insurance Profits, Net	4	5
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	30	34
Accumulated Amortization Of Values Of Business Acquired Distribution Agreements And Customer Relationships	12	8
Amortization of Intangible Assets	4	$ 4	$ 4
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	4
Finite-Lived Intangible Assets, Amortization Expense, Year Two	4
Finite-Lived Intangible Assets, Amortization Expense, Year Three	4
Finite-Lived Intangible Assets, Amortization Expense, Year Four	4
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 4

Summary of Significant Accoun_6

Summary of Significant Accounting Policies (New Accounting Pronouncements) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Adoption of New Accounting Standard Current Expected Credit Losses	$ 14	$ 0	$ 0
Accounting Standards Update 2016-13 [Member]
Adoption of New Accounting Standard Current Expected Credit Losses	15
Accounting Standards Update 2018-11
Adoption of New Accounting Standard Current Expected Credit Losses	$ 55

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of Earnings Per Share Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 132	$ 213	$ 158	$ (88)	$ 235	$ 263	$ 202	$ 170	$ 415	$ 870	$ 716
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic									65,400	62,700	63,700
Equivalent shares from outstanding stock options									400	1,200	1,400
Weighted Average Number of Shares Outstanding, Diluted									65,800	63,900	65,100
Earnings per share
Earnings Per Share, Basic (in dollars per share)	$ 1.95	$ 3.13	$ 2.49	$ (1.41)	$ 3.75	$ 4.19	$ 3.23	$ 2.70	$ 6.35	$ 13.88	$ 11.25
Earnings Per Share, Diluted (in dollars per share)	$ 1.94	$ 3.12	$ 2.48	$ (1.41)	$ 3.68	$ 4.12	$ 3.18	$ 2.65	$ 6.31	$ 13.62	$ 11

Earnings Per Share Earnings Per

Earnings Per Share Earnings Per Share (Narrative) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.4	0.2	0.1
Contingently Issuable Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.3	0.3	0.4

Investments (Investments in Fix

Investments (Investments in Fixed Maturity and Equity Securities Available-for-Sale by Sector) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 31,963	$ 29,205
Available-for-sale Securities	36,208	31,393
Financing Receivable, Allowance for Credit Loss	20
Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	49,548	46,753
Available-for-sale Securities, Gross Unrealized Gains	7,404	4,478
Available-for-sale Securities, Gross Unrealized Losses	197	110
Available-for-sale Securities	$ 56,735	$ 51,121
Percentage Of Total Available For Sale Securities	100.00%	100.00%
Financing Receivable, Allowance for Credit Loss	$ 20
Corporate Debt Securities [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	31,963	$ 29,205
Available-for-sale Securities, Gross Unrealized Gains	4,356	2,269
Available-for-sale Securities, Gross Unrealized Losses	94	81
Available-for-sale Securities	$ 36,208	$ 31,393
Percentage Of Total Available For Sale Securities	63.90%	61.40%
Financing Receivable, Allowance for Credit Loss	$ 17
Canadian Provincial Governments [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	3,145	$ 3,016
Available-for-sale Securities, Gross Unrealized Gains	1,995	1,596
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale Securities	$ 5,140	$ 4,612
Percentage Of Total Available For Sale Securities	9.10%	9.00%
Financing Receivable, Allowance for Credit Loss	$ 0
Residential Mortgage Backed Securities [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,735	$ 2,339
Available-for-sale Securities, Gross Unrealized Gains	84	62
Available-for-sale Securities, Gross Unrealized Losses	2	3
Available-for-sale Securities	$ 1,817	$ 2,398
Percentage Of Total Available For Sale Securities	3.20%	4.70%
Financing Receivable, Allowance for Credit Loss	$ 0
Asset-backed Securities [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	3,099	$ 2,973
Available-for-sale Securities, Gross Unrealized Gains	35	19
Available-for-sale Securities, Gross Unrealized Losses	42	14
Available-for-sale Securities	$ 3,092	$ 2,978
Percentage Of Total Available For Sale Securities	5.40%	5.80%
Financing Receivable, Allowance for Credit Loss	$ 0
Commercial Mortgage Backed Securities [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,790	$ 1,841
Available-for-sale Securities, Gross Unrealized Gains	102	61
Available-for-sale Securities, Gross Unrealized Losses	21	3
Available-for-sale Securities	$ 1,868	$ 1,899
Percentage Of Total Available For Sale Securities	3.30%	3.70%
Financing Receivable, Allowance for Credit Loss	$ 3
US Treasury and Government [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,242	$ 2,096
Available-for-sale Securities, Gross Unrealized Gains	196	57
Available-for-sale Securities, Gross Unrealized Losses	1	1
Available-for-sale Securities	$ 1,437	$ 2,152
Percentage Of Total Available For Sale Securities	2.50%	4.20%
Financing Receivable, Allowance for Credit Loss	$ 0
US States and Political Subdivisions Debt Securities [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,237	$ 1,074
Available-for-sale Securities, Gross Unrealized Gains	157	93
Available-for-sale Securities, Gross Unrealized Losses	4	3
Available-for-sale Securities	$ 1,390	$ 1,164
Percentage Of Total Available For Sale Securities	2.40%	2.30%
Financing Receivable, Allowance for Credit Loss	$ 0
Debt Security, Government, Non-US [Member] | Fixed Maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	5,337	$ 4,209
Available-for-sale Securities, Gross Unrealized Gains	479	321
Available-for-sale Securities, Gross Unrealized Losses	33	5
Available-for-sale Securities	$ 5,783	$ 4,525
Percentage Of Total Available For Sale Securities	10.20%	8.90%
Financing Receivable, Allowance for Credit Loss	$ 0

Investments (Fixed Maturity Sec

Investments (Fixed Maturity Securities Pledged And Received As Collateral) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 31,963	$ 29,205
Available-for-sale Securities	36,208	31,393
Assets Held-in-trust	572	694
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Assets Held-in-trust	31,179	29,239
Carrying Value [Member]
Debt Securities, Available-for-sale [Line Items]
Assets Held-in-trust	27,675	27,290
Collateral Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	148	113
Available-for-sale Securities	162	116
Collateral Received Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	$ 1,784	$ 727

Investments (Exposure To Concen

Investments (Exposure To Concentrations Of Credit Risk) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 31,963	$ 29,205
Available-for-sale Securities	36,208	31,393
JAPAN
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,493	813
Available-for-sale Securities	1,491	852
Canadian Province Of Ontario Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,303	1,205
Available-for-sale Securities	2,474	2,163
Canadian Province Of Quebec Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,054	1,014
Available-for-sale Securities	$ 1,528	$ 1,379

Investments (Amortized Cost and

Investments (Amortized Cost and Fair Value of Fixed Maturities by Contractual Maturities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis	$ 1,351
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis	8,248
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	10,676
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	22,649
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	6,624
Available for Sale at Fair value - Amortized cost	49,548	$ 46,753
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	1,362
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	8,797
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	11,956
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	27,843
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	6,777
Fixed maturity securities available-for-sale	$ 56,735	$ 51,121

Investments (Amortized Cost a_2

Investments (Amortized Cost and Fair Value of Fixed Maturity Holdings by Industry Type) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Corporate Secturities by Investment Sector And Credit Rating [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 31,963	$ 29,205
Available-for-sale Securities	$ 36,208	$ 31,393
Percentage Of Total Available For Sales Securities	100.00%	100.00%
Financial Services Sector [Member]
Corporate Secturities by Investment Sector And Credit Rating [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 11,785	$ 10,896
Available-for-sale Securities	$ 13,236	$ 11,653
Percentage Of Total Available For Sales Securities	36.60%	37.20%
Commercial and Industrial Sector [Member]
Corporate Secturities by Investment Sector And Credit Rating [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 16,274	$ 14,692
Available-for-sale Securities	$ 18,435	$ 15,803
Percentage Of Total Available For Sales Securities	50.90%	50.30%
Utility Industry [Member]
Corporate Secturities by Investment Sector And Credit Rating [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 3,904	$ 3,617
Available-for-sale Securities	$ 4,537	$ 3,937
Percentage Of Total Available For Sales Securities	12.50%	12.50%

Investments (Credit Losses Reco

Investments (Credit Losses Recognized in Earnings on Fixed Maturity Securities Held by the Company) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	$ 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	41
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(21)
Balance, end of period	20
Commercial Mortgage Backed Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	3
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	0
Balance, end of period	3
Foreign Government Debt [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	2
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(2)
Balance, end of period	0
Corporate Debt Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	36
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	(19)
Balance, end of period	$ 17

Investments (Fair Value Below A

Investments (Fair Value Below Amortized Cost of Gross Unrealized Losses for Fixed Maturity and Equity Securities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Gross unrealized losses with number of securities [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	$ 197	$ 110
Percentage Of Total Gross Unrealized Losses	100.00%	100.00%
Less Than 20 Percent [Member]
Gross unrealized losses with number of securities [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	$ 133	$ 76
Percentage Of Total Gross Unrealized Losses	67.50%	69.10%
More Than Or Equal To 20 Percent For Less Than Six Months [Member]
Gross unrealized losses with number of securities [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	$ 42	$ 20
Percentage Of Total Gross Unrealized Losses	21.30%	18.20%
More Than Or Equal To 20 Percent For Six Months Or Greater [Member]
Gross unrealized losses with number of securities [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	$ 22	$ 14
Percentage Of Total Gross Unrealized Losses	11.20%	12.70%

Investments (Fair Value and Los

Investments (Fair Value and Losses by Investment Category and Length of Time in a Loss Position) (Details) - Fixed Maturities [Member] - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 4,068	$ 3,979
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	163	84
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	769	1,238
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	34	26
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,837	5,217
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	197	110
External Credit Rating, Investment Grade [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,546	3,759
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	83	46
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	656	1,128
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	19	18
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,202	4,887
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	102	64
External Credit Rating, Investment Grade [Member] | Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	930	1,936
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	29	29
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	70	293
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	5	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,000	2,229
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	34	36
External Credit Rating, Investment Grade [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	294	367
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	2	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	84
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	294	451
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	2	3
External Credit Rating, Investment Grade [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,096	773
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	17	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	570	739
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	11	9
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,666	1,512
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	28	14
External Credit Rating, Investment Grade [Member] | Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	160	253
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	6	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	160	253
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	6	3
External Credit Rating, Investment Grade [Member] | US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	27	49
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	1	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	27	49
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	1	1
External Credit Rating, Investment Grade [Member] | US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	66	103
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	1	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	16	12
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	3	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	82	115
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	4	3
External Credit Rating, Investment Grade [Member] | Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	973	278
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	27	4
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	973	278
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	27	4
External Credit Rating, Non Investment Grade [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	522	220
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	80	38
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	113	110
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	15	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	635	330
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	95	46
External Credit Rating, Non Investment Grade [Member] | Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	375	220
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	49	38
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	81	100
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	11	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	456	320
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	60	45
External Credit Rating, Non Investment Grade [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	20	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	13	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	4	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	1	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	24	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	14	0
External Credit Rating, Non Investment Grade [Member] | Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	91	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	15	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	91	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	15	0
External Credit Rating, Non Investment Grade [Member] | Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	36	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	3	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	28	10
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	3	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	64	10
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	$ 6	$ 1

Investments (Investment Income

Investments (Investment Income Net of Related Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	$ 2,667	$ 2,616	$ 2,229
Investment Income, Investment Expense	(92)	(96)	(90)
Investment income, net of related expenses	2,575	2,520	2,139
Available-for-sale Securities [Member]
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	1,928	1,786	1,529
Equity Securities [Member]
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	6	8	4
Mortgage Loans on Real Estate [Member]
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	282	255	214
Policy Loans [Member]
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	56	58	59
Funds Withheld At Interest [Member]
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	279	297	310
Short-term Investments [Member]
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	7	28	14
Other Aggregated Investments [Member]
Major Categories Of Investment Income Net Of Expenses [Line Items]
Gross Investment Income, Operating	$ 109	$ 184	$ 99

Investments (Investment Related

Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Abstract]
Other than Temporary Impairment Losses, Investments	$ (21)	$ (31)	$ (28)
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	(82)	(50)	(159)
Gain (Loss) on Sale of Equity Investments	(15)	16	(20)
Available-for-sale Securities, Gross Realized Gains	114	151	65
Other Impairment Losses And Change In Mortgage Loan Provision	(56)	(12)	(12)
Derivatives And Other Investments Net	27	17	(16)
Realized Investment Gains (Losses)	$ (33)	$ 91	$ (170)

Investments (Borrowed Securitie

Investments (Borrowed Securities Repurchased Securities And Repurchased Reversed Repurchased Securities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Securities Received as Collateral	$ 102	$ 107
Securities for Reverse Repurchase Agreements	653	356
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	669	370
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash		1
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Securities Borrowed	161	369
Securities Loaned, Fair Value of Collateral	105	104
Securities for Reverse Repurchase Agreements	711	384
Carrying Value [Member]
Debt Securities, Available-for-sale [Line Items]
Securities Borrowed	118	339
Securities Loaned, Fair Value of Collateral	$ 94	$ 98

Investments (Securities Pledged

Investments (Securities Pledged as Collateral Related to Repurchase Reverse Repurchase Program) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	$ 105	$ 104
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	711	384
Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	771	478
Secured Borrowings, Gross, Difference, Amount	45	10
Obligation to Return Securities Received as Collateral	816	488
Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0	0
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Obligation to Return Securities Received as Collateral	0	0
Maturity Less than 30 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0	0
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Obligation to Return Securities Received as Collateral	0	0
Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0	0
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Obligation to Return Securities Received as Collateral	0	0
Maturity Greater than 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	105	104
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	711	384
Obligation to Return Securities Received as Collateral	816	488
Corporate Debt Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	105	104
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	417	286
Corporate Debt Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0	0
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Corporate Debt Securities [Member] | Maturity Less than 30 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0	0
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Corporate Debt Securities [Member] | Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0	0
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Corporate Debt Securities [Member] | Maturity Greater than 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	105	104
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	417	286
Debt Security, Government, Non-US [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	294	98
Debt Security, Government, Non-US [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Debt Security, Government, Non-US [Member] | Maturity Less than 30 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Debt Security, Government, Non-US [Member] | Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	0	0
Debt Security, Government, Non-US [Member] | Maturity Greater than 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	$ 294	$ 98

Investments (Mortgage Loans by

Investments (Mortgage Loans by Property Type) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 5,861	$ 5,727
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	$ (10)	$ (9)
Allowance for Loan and Lease Losses, Real Estate	(64)	(12)	$ (11)	$ (9)
Mortgage loans on real estate	5,787	5,706
Office Building [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 1,702	$ 1,771
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	29.00%	31.00%
Retail Site [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 1,711	$ 1,686
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	29.30%	29.40%
Industrial Property [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 1,210	$ 1,169
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	20.60%	20.40%
Apartment Building [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 808	$ 766
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	13.80%	13.40%
Other Property [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 430	$ 335
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	7.30%	5.80%

Investments (Mortgage Loans b_2

Investments (Mortgage Loans by Maturity Date) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 5,861	$ 5,727
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
Mortgage Loans On Real Estate Due One Year Through Five Years [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 2,276	$ 1,841
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	38.80%	32.20%
Mortgage Loans On Real Estate Due After Five Years [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 2,768	$ 2,944
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	47.30%	51.40%
Mortgage Loans On Real Estate Due After Ten Years [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 817	$ 942
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	13.90%	16.40%

Investments (Mortgage Loans b_3

Investments (Mortgage Loans by Credit Quality Indicator) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 5,861	$ 5,727
Construction Loan	$ 12	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
Greater than 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 5,531	$ 5,454
1.00x - 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	238	179
Less than 1.00x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	80	94
0% - 59.99%
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	2,909	3,084
Construction Loan	$ 12	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	49.60%	53.80%
0% - 59.99% | Greater than 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 2,774	$ 3,025
0% - 59.99% | 1.00x - 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	106	52
0% - 59.99% | Less than 1.00x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	17	7
60% - 69.99%
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	2,108	1,905
Construction Loan	$ 0	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	36.00%	33.30%
60% - 69.99% | Greater than 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 2,013	$ 1,841
60% - 69.99% | 1.00x - 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	62	53
60% - 69.99% | Less than 1.00x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	33	11
70% - 79.99%
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	617	544
Construction Loan	$ 0	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	10.50%	9.50%
70% - 79.99% | Greater than 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 555	$ 492
70% - 79.99% | 1.00x - 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	49	13
70% - 79.99% | Less than 1.00x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	13	39
Greater than 80%
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	227	194
Construction Loan	$ 0	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	3.90%	3.40%
Greater than 80% | Greater than 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 189	$ 96
Greater than 80% | 1.00x - 1.20x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	21	61
Greater than 80% | Less than 1.00x
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 17	$ 37

Investments (Mortgage Loans b_4

Investments (Mortgage Loans by Method of Evaluation and Related Valuation Allowances) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Mortgage Loans [Abstract]
Financing Receivable, Individually Evaluated for Impairment	$ 37	$ 17
Financing Receivable, Collectively Evaluated for Impairment	5,824	5,710
Loans Receivable, Gross, Commercial, Real Estate	5,861	5,727
Valuation Allowances [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	64	12
Allowance for Loan and Lease Losses, Real Estate	$ 64	$ 12	$ 11	$ 9

Investments (Loan Valuation All

Investments (Loan Valuation Allowance for Mortgage Loans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Balance beginning	$ 12	$ 11	$ 9
Provision	38	1	2
Balance ending	64	12	11
Adoption of New Accounting Standard Current Expected Credit Losses	$ 14	$ 0	$ 0

Investments (Internal Credit Qu

Investments (Internal Credit Quality Indicators) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 5,861	$ 5,727
High Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	3,438
Internal Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	2,271
Average Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	111
Watch List
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	4
Internal Noninvestment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	37
Year Of Origination 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	763
Year Of Origination 2020 | High Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	411
Year Of Origination 2020 | Internal Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	352
Year Of Origination 2020 | Average Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2020 | Watch List
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2020 | Internal Noninvestment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	1,112
Year Of Origination 2019 | High Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	616
Year Of Origination 2019 | Internal Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	496
Year Of Origination 2019 | Average Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2019 | Watch List
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2019 | Internal Noninvestment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	892
Year Of Origination 2018 | High Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	493
Year Of Origination 2018 | Internal Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	399
Year Of Origination 2018 | Average Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2018 | Watch List
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2018 | Internal Noninvestment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2017
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	762
Year Of Origination 2017 | High Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	336
Year Of Origination 2017 | Internal Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	407
Year Of Origination 2017 | Average Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	19
Year Of Origination 2017 | Watch List
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2017 | Internal Noninvestment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2016
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	860
Year Of Origination 2016 | High Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	574
Year Of Origination 2016 | Internal Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	249
Year Of Origination 2016 | Average Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	37
Year Of Origination 2016 | Watch List
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination 2016 | Internal Noninvestment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	0
Year Of Origination Prior Periods
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	1,472
Year Of Origination Prior Periods | High Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	1,008
Year Of Origination Prior Periods | Internal Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	368
Year Of Origination Prior Periods | Average Investment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	55
Year Of Origination Prior Periods | Watch List
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	4
Year Of Origination Prior Periods | Internal Noninvestment Grade
Financing Receivable, Credit Quality Indicator [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 37

Investments, Debt and Equity Se

Investments, Debt and Equity Securities (Age Analysis of Past Due Recorded Investments) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	$ 15	$ 0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		5,727
Loans Receivable, Gross, Commercial, Real Estate	5,861	5,727
Commercial Real Estate Portfolio Segment
Financing Receivable, Past Due [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	5,846
Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Past Due	$ 15	$ 0

Investments (Impaired Mortgage

Investments (Impaired Mortgage Loans) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		$ 37	$ 17
Impaired Financing Receivable, Recorded Investment		37	17
Impaired Financing Receivable, Related Allowance		0	0
Impaired Financing Receivable Net Of Related Allowance		37	17
Impaired Financing Receivable, Average Recorded Investment	[1]	25	20	$ 24
Impaired Financing Receivable, Interest Income, Accrual Method		1	1	1
Impaired mortgage loans with no valuation allowance recorded
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		37	17
Impaired Financing Receivable, Recorded Investment		37	17
Impaired Financing Receivable, Related Allowance		0	0
Impaired Financing Receivable Net Of Related Allowance		37	17
Impaired Financing Receivable, Average Recorded Investment	[1]	25	20	24
Impaired Financing Receivable, Interest Income, Accrual Method		1	1	1
Impaired mortgage loans with valuation allowance recorded
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance		0	0
Impaired Financing Receivable, Recorded Investment		0	0
Impaired Financing Receivable, Related Allowance		0	0
Impaired Financing Receivable Net Of Related Allowance		0	0
Impaired Financing Receivable, Average Recorded Investment	[1]	0	0	0
Impaired Financing Receivable, Interest Income, Accrual Method		$ 0	$ 0	$ 0
[1]	Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.

Investments (Other Invested Ass

Investments (Other Invested Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Investments [Abstract]
Other invested assets	$ 2,829	$ 2,363
Limited Partner [Member]
Other Investments [Abstract]
Other invested assets	1,367	1,134
Gain (Loss) on Derivatives [Member]
Other Investments [Abstract]
Other invested assets	140	117
Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Other Investments [Abstract]
Other invested assets	289	260
Other [Member]
Other Investments [Abstract]
Other invested assets	98	77
Equity Release Mortgages [Member]
Other Investments [Abstract]
Other invested assets	$ 935	$ 775

Investments Investments (Narrat

Investments Investments (Narrative) (Details) $ in Millions		12 Months Ended
		Dec. 31, 2020USD ($)position	Dec. 31, 2019USD ($)position	Dec. 31, 2018USD ($)
Investment Narrative [Line Items]
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash			$ 1
Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements			1
Available-for-sale Securities, Amortized Cost Basis		$ 31,963	29,205
Available-for-sale Securities		$ 36,208	$ 31,393
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | position		877,000	1,072
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments		$ 82	$ 50	$ 159
Securities for Reverse Repurchase Agreements		$ 653	$ 356
Percentage Of Total Gross Unrealized Losses		100.00%	100.00%
Funds withheld at interest		$ 5,432	$ 5,662
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total		100.00%	100.00%
Mortgage Loan Carrying Value Payout Adjusted Due To COVID-19		$ 660
Funds Held Under Reinsurance Agreements Asset Specific Client		3,200
Allowance for Credit Losses On Lifetime Mortgages		2
Non-Income Producing Securities [Member]
Investment Narrative [Line Items]
Available-for-sale Securities, Amortized Cost Basis		71	$ 47
Available-for-sale Securities		63	51
Canadian Province Of Quebec Securities [Member]
Investment Narrative [Line Items]
Available-for-sale Securities, Amortized Cost Basis		1,054	1,014
Available-for-sale Securities		1,528	1,379
Collateral Received Fixed Maturity Securities [Member]
Investment Narrative [Line Items]
Available-for-sale Securities		1,784	727
Carrying Value [Member]
Investment Narrative [Line Items]
Securities Borrowed		118	339
Funds withheld at interest	[1]	$ 5,292	$ 5,526
CALIFORNIA
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total		14.60%
TEXAS
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total		14.10%
GEORGIA
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total		8.40%
Canada Segment Reporting Information [Member]
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total		3.20%
UNITED KINGDOM
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total		1.30%
[1]	Carrying values presented herein may differ from those in the Company’s consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

Derivative Instruments (Gross N

Derivative Instruments (Gross Notional Amount and Fair Value of Derivatives Contracts) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Notional Amount of Derivatives	$ 23,298	$ 19,446
Derivative Asset, Fair Value, Gross Asset	229	258
Derivative Liability, Fair Value, Gross Liability	987	1,003
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount of Derivatives	21,007	17,475
Derivative Asset, Fair Value, Gross Asset	208	212
Derivative Liability, Fair Value, Gross Liability	947	970
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Derivatives	1,084	909
Derivative Asset, Fair Value, Gross Asset	93	70
Derivative Liability, Fair Value, Gross Liability	1	3
Not Designated as Hedging Instrument [Member] | Future [Member]
Derivative [Line Items]
Notional Amount of Derivatives	258	307
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional Amount of Derivatives	347	175
Derivative Asset, Fair Value, Gross Asset	4	1
Derivative Liability, Fair Value, Gross Liability	2	0
Not Designated as Hedging Instrument [Member] | Consumer Price Index Swap [Member]
Derivative [Line Items]
Notional Amount of Derivatives	612	441
Derivative Asset, Fair Value, Gross Asset	11	0
Derivative Liability, Fair Value, Gross Liability	19	28
Not Designated as Hedging Instrument [Member] | Credit Default Swap [Member]
Derivative [Line Items]
Notional Amount of Derivatives	1,517	1,306
Derivative Asset, Fair Value, Gross Asset	13	5
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument [Member] | Equity [Member]
Derivative [Line Items]
Notional Amount of Derivatives	395	364
Derivative Asset, Fair Value, Gross Asset	29	15
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument [Member] | Synthetic Guaranteed Investment Contracts [Member]
Derivative [Line Items]
Notional Amount of Derivatives	16,644	13,823
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements [Member]
Derivative [Line Items]
Notional Amount of Derivatives	0	0
Derivative Asset, Fair Value, Gross Asset	58	121
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Indexed Annuity [Member]
Derivative [Line Items]
Notional Amount of Derivatives	0	0
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	752	767
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Variable Annuity [Member]
Derivative [Line Items]
Notional Amount of Derivatives	0	0
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	155	163
Not Designated as Hedging Instrument [Member] | Currency Swap [Member]
Derivative [Line Items]
Notional Amount of Derivatives	150	150
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	18	9
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount of Derivatives	2,291	1,971
Derivative Asset, Fair Value, Gross Asset	21	46
Derivative Liability, Fair Value, Gross Liability	40	33
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Derivatives	802	535
Derivative Asset, Fair Value, Gross Asset	3	1
Derivative Liability, Fair Value, Gross Liability	24	29
Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional Amount of Derivatives	1,255	1,094
Derivative Asset, Fair Value, Gross Asset	10	28
Derivative Liability, Fair Value, Gross Liability	15	2
Designated as Hedging Instrument [Member] | Currency Swap [Member]
Derivative [Line Items]
Notional Amount of Derivatives	234	342
Derivative Asset, Fair Value, Gross Asset	8	17
Derivative Liability, Fair Value, Gross Liability	$ 1	$ 2

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments (Fair Value Hedge Attributable to Foreign Currency) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	$ 8	$ (4)	$ (11)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ (10)	$ 0	$ 12

Derivative Instruments (Current

Derivative Instruments (Current Period Cash Flow Hedges in AOCI (loss) before Taxes) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Balance, Beginning of Period	$ (26)	$ 9	$ 3
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(27)	(34)	6
Balance, End of Period	(49)	(26)	9
Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 4	$ (1)	$ 0

Derivative Instruments (Cash Fl

Derivative Instruments (Cash Flow Hedges) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (27)	$ (34)	$ 6
Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(4)	1	0
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(33)	(32)	12
Interest Rate Swap [Member] | Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Interest Rate Swap [Member] | Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(4)	1	0
Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	6	(2)	(6)
Currency Swap [Member] | Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Currency Swap [Member] | Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0
Currency Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 0	$ 0	$ 0

Derivative Instruments (Hedges

Derivative Instruments (Hedges of Net Investments in Foreign Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Gains Losses Deferred In Accumulated Other Comprehensive Income Loss On Derivatives	$ (29)	$ (33)	$ 87
Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Gains Losses Deferred In Accumulated Other Comprehensive Income Loss On Derivatives	1	(9)	31
Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Gains Losses Deferred In Accumulated Other Comprehensive Income Loss On Derivatives	$ (30)	$ (24)	$ 56

Derivative Instruments (Non Hed

Derivative Instruments (Non Hedging Derivatives and Embedded Derivatives Effect on Income Statement) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	$ (33)	$ 91	$ (170)
Other revenues	(360)	(392)	(363)
Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives	59	4	0
Indexed annuity products	(704)	(697)	(425)
Not Designated as Hedging Instrument [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(25)	(37)	(1)
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	76	65	(21)
Not Designated as Hedging Instrument [Member] | Future [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(47)	(46)	21
Not Designated as Hedging Instrument [Member] | Currency Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(7)	0	(4)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	5	1	0
Not Designated as Hedging Instrument [Member] | Consumer Price Index Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	16	(18)	(10)
Not Designated as Hedging Instrument [Member] | Credit Default Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	16	30	(2)
Not Designated as Hedging Instrument [Member] | Equity [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	0	(40)	7
Not Designated as Hedging Instrument [Member] | Longevity Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Other revenues	0	(13)	(9)
Not Designated as Hedging Instrument [Member] | Mortality Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Other revenues	0	(1)	0
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(62)	11	(13)
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Indexed Annuity [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Indexed annuity products	(30)	(57)	(27)
Not Designated as Hedging Instrument [Member] | Embedded Derivatives In Variable Annuity [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	$ 8	$ 5	$ (15)

Derivative Instruments (Exposur

Derivative Instruments (Exposure from Credit Derivatives by Rating of the Underlying Credits) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 13	$ 5
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 1,517	$ 1,306
Derivative Average Remaining Maturity	[1],[3]	5 years 7 months 6 days	3 years 8 months 12 days
Standard Poors AAA To A Ratings [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 11	$ 2
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 287	$ 142
Derivative Average Remaining Maturity	[1],[3]	15 years	1 year 8 months 12 days
Standard & Poor's, BBB Rating [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 2	$ 3
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 1,220	$ 1,164
Derivative Average Remaining Maturity	[1],[3]	3 years 6 months	4 years
Standard & Poor's, BB+ Rating [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 0	$ 0
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 10	$ 0
Derivative Average Remaining Maturity	[1],[3]	8 months 12 days	0 years
Single Name Credit Default Swaps [Member] | Standard Poors AAA To A Ratings [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 11	$ 2
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 287	$ 142
Derivative Average Remaining Maturity	[1],[3]	15 years	1 year 8 months 12 days
Single Name Credit Default Swaps [Member] | Standard & Poor's, BBB Rating [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 2	$ 3
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 232	$ 291
Derivative Average Remaining Maturity	[1],[3]	1 year 7 months 6 days	1 year 10 months 24 days
Single Name Credit Default Swaps [Member] | Standard & Poor's, BB+ Rating [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 0	$ 0
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 10	$ 0
Derivative Average Remaining Maturity	[1],[3]	8 months 12 days	0 years
Credit Default Swaps Referencing Indices [Member] | Standard & Poor's, BBB Rating [Member]
Credit Derivatives [Line Items]
Credit Risk Derivatives, at Fair Value, Net	[1]	$ 0	$ 0
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 988	$ 873
Derivative Average Remaining Maturity	[1],[3]	3 years 10 months 24 days	4 years 8 months 12 days
[1]	The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).
[2]	Assumes the value of the referenced credit obligations is zero.
[3]	The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts

Derivative Instruments (Derivat

Derivative Instruments (Derivative Instruments Offsetting Balance Sheet) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Derivative Asset [Abstract]
Derivative Fair Value Of Free Standing Derivative Asset		$ 171	$ 137
Derivative Asset, Fair Value, Gross Liability		(31)	(20)
Derivative Asset		140	117
Derivative Asset, Fair Value of Collateral	[1]	(30)	0
Derivative, Collateral, Obligation to Return Cash		(98)	(119)
Derivative Asset, Fair Value, Amount Offset Against Collateral		12	(2)
Derivative Liability [Abstract]
Derivative Fair Value Of Free Standing Derivative Liability		80	73
Derivative Liability, Fair Value, Gross Asset		(31)	(20)
Derivative Liability		49	53
Derivative Liability, Fair Value of Collateral	[1]	(146)	(92)
Derivative, Collateral, Right to Reclaim Cash		(47)	(52)
Derivative Liability, Fair Value, Amount Offset Against Collateral		$ (144)	$ (91)
[1]	Includes initial margin posted to a central clearing partner.

Derivative Instruments (Narrati

Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Cumulative Foreign Currency Translation Gain Loss Recorded In Accumulated Other Comprehensive Income Loss For Net Investment In Foreign Operations Hedges	$ 139	$ 168
Counterparty Credit Derivative Exposure	19
Derivative Credit Risk Valuation Adjustment, Derivative Assets	70
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax Future Reclass	6
Deferred Net Gains On Derivatives Expected to Be Reclassified To Investment Income	$ 1

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities (Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	$ 56,735	$ 51,121
Equity Method Investments, Fair Value Disclosure	132	320
Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives	114	121
Cash and Cash Equivalents, Fair Value Disclosure	1,478	274
Fair Value Measured On Recurring Basis Short Term Investments	197	32
Derivative Assets (Liabilities), at Fair Value, Net	140	117
Investments, Fair Value Disclosure	429	377
Assets, Fair Value Disclosure	59,085	52,245
Liabilities, Fair Value Disclosure [Abstract]
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	907	930
Other Liabilities, Fair Value Disclosure	49	53
Financial Liabilities Fair Value Disclosure	956	983
Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,312	2,030
Equity Method Investments, Fair Value Disclosure	79	243
Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives	0	0
Cash and Cash Equivalents, Fair Value Disclosure	1,478	274
Fair Value Measured On Recurring Basis Short Term Investments	32	4
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Investments, Fair Value Disclosure	224	207
Assets, Fair Value Disclosure	3,125	2,758
Liabilities, Fair Value Disclosure [Abstract]
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	0	0
Other Liabilities, Fair Value Disclosure	0
Financial Liabilities Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	52,100	45,952
Equity Method Investments, Fair Value Disclosure	0	0
Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Fair Value Measured On Recurring Basis Short Term Investments	150	26
Derivative Assets (Liabilities), at Fair Value, Net	140	117
Investments, Fair Value Disclosure	205	170
Assets, Fair Value Disclosure	52,455	46,148
Liabilities, Fair Value Disclosure [Abstract]
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	0	0
Other Liabilities, Fair Value Disclosure	49
Financial Liabilities Fair Value Disclosure	49	53
Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	3,323	3,139
Equity Method Investments, Fair Value Disclosure	53	77
Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives	114	121
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Fair Value Measured On Recurring Basis Short Term Investments	15	2
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Investments, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	3,505	3,339
Liabilities, Fair Value Disclosure [Abstract]
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	907	930
Other Liabilities, Fair Value Disclosure	0
Financial Liabilities Fair Value Disclosure	907	930
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Other Liabilities, Fair Value Disclosure		0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Other Liabilities, Fair Value Disclosure		53
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure [Abstract]
Other Liabilities, Fair Value Disclosure		0
Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	289	260
Fair Value Option Contractholder Directed Unit Linked Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	224	207
Fair Value Option Contractholder Directed Unit Linked Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	65	53
Fair Value Option Contractholder Directed Unit Linked Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Investments, Fair Value Disclosure	0	0
Corporate Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	36,208	31,393
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	33,179	29,207
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	3,029	2,186
Canadian Provincial Governments [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	5,140	4,612
Canadian Provincial Governments [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Canadian Provincial Governments [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	5,140	3,908
Canadian Provincial Governments [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	704
Residential Mortgage Backed Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,817	2,398
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,814	2,349
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	3	49
Asset-backed Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	3,092	2,978
Assets, Fair Value Disclosure	87	101
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	2,896	2,865
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	196	113
Commercial Mortgage Backed Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,868	1,899
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,813	1,853
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	55	46
US Treasury and Government [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,437	2,152
US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,312	2,030
US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	111	106
US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	14	16
US States and Political Subdivisions Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,390	1,164
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,381	1,155
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	9	9
Debt Security, Government, Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	5,783	4,525
Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	5,766	4,509
Debt Security, Government, Non-US [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	$ 17	$ 16

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities (Quantitative Information for Level 3 Inputs) (Details) $ in Millions	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 59,085	$ 52,245
Embedded Derivatives In Indexed Annuity [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	752	768
Embedded Derivatives In Variable Annuity [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	155	163
Foreign Government Debt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 0	$ 16
Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.02	0.02
Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.04	0.04
Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.02	0.02
Debt Security, Corporate, Non-US [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input		0
Debt Security, Corporate, Non-US [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input		0.01
Debt Security, Corporate, Non-US [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0	0.01
Asset-backed Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 87	$ 101
Asset-backed Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0
Asset-backed Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.18	0.04
Asset-backed Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
Corporate Debt Securities [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 37	$ 1,070
Total Return Swap [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	58	121
US Government Agencies Debt Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 14	$ 16
US Government Agencies Debt Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0	0
US Government Agencies Debt Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
US Government Agencies Debt Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
Equity Securities [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 10	$ 32
Equity Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	0	0.04
Corporate And Other Segment Reporting Information [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0	0
Corporate And Other Segment Reporting Information [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.02
Corporate And Other Segment Reporting Information [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
Measurement Input, Long-term Revenue Growth Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Long-term Revenue Growth Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.27	0.27
Measurement Input, Long-term Revenue Growth Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.13	0.12
Measurement Input Crediting Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.02	0.02
Measurement Input Crediting Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.04	0.04
Measurement Input Crediting Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.02	0.02
Measurement Input, Counterparty Credit Risk [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Counterparty Credit Risk [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.05	0.05
Measurement Input, Counterparty Credit Risk [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.01	0.01
Measurement Input, Counterparty Credit Risk [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0	0
Measurement Input, Counterparty Credit Risk [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.05	0.05
Measurement Input, Counterparty Credit Risk [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.01	0.01
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.07	0.07
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.05	0.05
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.05	0.05
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.03	0.03
Measurement Input, Withdrawal Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0	0
Measurement Input, Withdrawal Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.05	0.05
Measurement Input, Withdrawal Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.03	0.03
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.25	0.25
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.04	0.05
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.35	0.35
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.13	0.13
Measurement Input, Lapse Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0	0
Measurement Input, Lapse Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.35	0.35
Measurement Input, Lapse Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.13	0.13
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	1	1
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.02	0.01
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0	0
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	1	1
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.03	0.02
Measurement Input, Mortality Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0	0
Measurement Input, Mortality Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	1	1
Measurement Input, Mortality Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.03	0.02
Measurement Input, EBITDA Multiple [Member] | Corporate Debt Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	5.2	5.2
Measurement Input, EBITDA Multiple [Member] | Corporate Debt Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	11.2	7.1
Measurement Input, EBITDA Multiple [Member] | Corporate Debt Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	7.1	6.7
Measurement Input, EBITDA Multiple [Member] | Equity Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	6.9	6.9
Measurement Input, EBITDA Multiple [Member] | Equity Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	10.6	9.3
Measurement Input, EBITDA Multiple [Member] | Equity Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	7.9	7.8

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		$ 77	$ 33	$ 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	3	33	14
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0	(1)	(7)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	39
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		14	0	0
Fair Value, Asset Value, End of period		53	77	33
Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		2,186	1,331	1,337
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		28	48	(33)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	1,193	1,050	509
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	(182)	(81)	(106)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	(229)	(194)	(273)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		57	43	10
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		4	1	107
Fair Value, Asset Value, End of period		3,029	2,186	1,331
Debt Security, Government, Non-US [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		720	533	599
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		1	162	(80)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	0	10	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		704	0	0
Fair Value, Asset Value, End of period		17	720	533
Structured Finance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		208	103	235
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(7)	4	(3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	149	85	94
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	(5)	(1)	(7)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	(59)	(63)	(62)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		38	86	78
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		70	6	234
Fair Value, Asset Value, End of period		254	208	103
US Government Agencies Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		25	28	64
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		1	1	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	(3)	(4)	(5)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	10
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0	0	41
Fair Value, Asset Value, End of period		23	25	28
Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		121	110	122
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	60	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0	0	0
Fair Value, Asset Value, End of period		114	121	110
Longevity Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		0	48	39
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0	(2)	(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	0	(58)	(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0	0	0
Fair Value, Asset Value, End of period		0	0	48
Short-term Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset Value, Beginning of period		2	2	3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0	(1)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	17	30	3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0	(1)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	(3)	(1)	(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		1	27	3
Fair Value, Asset Value, End of period		15	2	2
Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	[1]	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3		0	0	0
Fair Value, Liability Value, Beginning of period		(930)	(945)	(1,014)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	[1]	(32)	(17)	(19)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	[1]	77	84	76
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3		0	0	0
Fair Value, Liability Value, End of period		(907)	(930)	(945)
Investment Income [Member] | Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Income [Member] | Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		2	1	(1)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	2	(1)
Investment Income [Member] | Debt Security, Government, Non-US [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	15	14
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	15	14
Investment Income [Member] | Structured Finance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Income [Member] | US Government Agencies Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Income [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(4)	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		(4)	0	0
Investment Income [Member] | Longevity Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Income [Member] | Short-term Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Income [Member] | Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Related Gains Losses [Member] | Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(13)	12	(13)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		(13)	12	(16)
Investment Related Gains Losses [Member] | Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(22)	(11)	(5)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		(23)	(11)	(6)
Investment Related Gains Losses [Member] | Debt Security, Government, Non-US [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Related Gains Losses [Member] | Structured Finance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	2
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Related Gains Losses [Member] | US Government Agencies Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Related Gains Losses [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(63)	11	(12)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		(63)	11	(12)
Investment Related Gains Losses [Member] | Longevity Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Related Gains Losses [Member] | Short-term Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Investment Related Gains Losses [Member] | Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		(8)	(5)	15
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)		(2)	(3)	(22)
Interest Income [Member] | Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | Debt Security, Government, Non-US [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | Structured Finance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | US Government Agencies Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | Longevity Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | Short-term Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Interest Income [Member] | Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		30	57	(27)
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)		(107)	(140)	(49)
Other Income [Member] | Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Other Income [Member] | Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Other Income [Member] | Debt Security, Government, Non-US [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Other Income [Member] | Structured Finance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Other Income [Member] | US Government Agencies Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Other Income [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Other Income [Member] | Longevity Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	12	9
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	9
Other Income [Member] | Short-term Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	0	0
Other Income [Member] | Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0	0	0
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)		0	$ 0	$ 0
Other Comprehensive Income (Loss) | Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0
Other Comprehensive Income (Loss) | Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		(34)
Other Comprehensive Income (Loss) | Debt Security, Government, Non-US [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		1
Other Comprehensive Income (Loss) | Structured Finance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		(8)
Other Comprehensive Income (Loss) | US Government Agencies Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		1
Other Comprehensive Income (Loss) | Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0
Other Comprehensive Income (Loss) | Longevity Swap [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0
Other Comprehensive Income (Loss) | Short-term Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)		0
Other Comprehensive Income (Loss) | Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Calculation [Roll Forward]
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)		$ 0
[1]	The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities (Fair Value Assets Measured on Non-Recurring Basis) (Details) - Partnership Interest [Member] - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value Assets Carrying Value Prior To Impairment	[1]	$ 20	$ 18
Fair Value Assets Gains Losses	[1]	$ (17)	$ (11)
[1]	Impairments on these investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. Real estate joint ventures were recognized at estimated fair value determined using historical and forecasted information for specific properties, including net operating income, occupancy, and sales levels. The market for these investments has limited activity and price transparency

Fair Value of Assets and Liab_7

Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		$ 5,787	$ 5,706
Policy loans		1,258	1,319
Funds withheld at interest		5,432	5,662
Cash and cash equivalents		3,408	1,449	$ 1,890	$ 1,304
Short-term investments		227	64
Other invested assets		2,829	2,363
Accrued investment income		511	493
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities		23,276	22,711
Collateral finance and securitization notes		388	598
Carrying Value [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate	[1]	5,787	5,706
Policy loans	[1]	1,258	1,319
Funds withheld at interest	[1]	5,292	5,526
Cash and cash equivalents	[1]	1,930	1,175
Short-term investments	[1]	30	32
Other invested assets	[1]	1,482	1,259
Accrued investment income	[1]	511	493
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities	[1]	18,106	19,163
Long And Short Term Debt	[1]	3,573	2,981
Collateral finance and securitization notes	[1]	388	598
Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		6,167	5,935
Policy loans		1,258	1,319
Funds withheld at interest		5,676	5,870
Cash and cash equivalents		1,930	1,175
Short-term investments		30	32
Other invested assets		1,601	1,278
Accrued investment income		511	493
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities		19,683	21,542
Long And Short Term Debt		3,901	3,179
Collateral finance and securitization notes		351	551
Estimate of Fair Value Measurement [Member] | Net Asset Value [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		0	0
Policy loans		0	0
Funds withheld at interest		0	0
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		489	402
Accrued investment income		0	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities		0	0
Long And Short Term Debt		0	0
Collateral finance and securitization notes		0	0
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		0	0
Policy loans		0	0
Funds withheld at interest		0	0
Cash and cash equivalents		1,930	1,175
Short-term investments		30	32
Other invested assets		5	5
Accrued investment income		0	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities		0	0
Long And Short Term Debt		0	0
Collateral finance and securitization notes		0	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		0	0
Policy loans		1,258	1,319
Funds withheld at interest		0	0
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		89	68
Accrued investment income		511	493
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities		0	0
Long And Short Term Debt		0	0
Collateral finance and securitization notes		0	0
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Mortgage loans on real estate		6,167	5,935
Policy loans		0	0
Funds withheld at interest		5,676	5,870
Cash and cash equivalents		0	0
Short-term investments		0	0
Other invested assets		1,018	803
Accrued investment income		0	0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Interest-sensitive contract liabilities		19,683	21,542
Long And Short Term Debt		3,901	3,179
Collateral finance and securitization notes		$ 351	$ 551
[1]	Carrying values presented herein may differ from those in the Company’s consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

Reinsurance Reinsurance (Ceded

Reinsurance Reinsurance (Ceded Reinsurance Receivable Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 983	$ 904
Reinsurance Recoverables, Percentage of Total	100.00%	100.00%
Other Reinsurers [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 182	$ 149
Reinsurance Recoverables, Percentage of Total	18.50%	16.40%
AM Best, A+ Rating [Member] | Reinsurer A [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 420	$ 367
Reinsurance Recoverables, Percentage of Total	42.70%	40.60%
AM Best, A+ Rating [Member] | Reinsurer B [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 216	$ 208
Reinsurance Recoverables, Percentage of Total	22.00%	23.00%
AM Best, A+ Rating [Member] | Reinsurer D [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 55	$ 53
Reinsurance Recoverables, Percentage of Total	5.60%	5.90%
AM Best, A Rating [Member] | Reinsurer C [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 64	$ 84
Reinsurance Recoverables, Percentage of Total	6.50%	9.30%
AM Best, A++ Rating [Member] | Reinsurer E [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 46	$ 43
Reinsurance Recoverables, Percentage of Total	4.70%	4.80%

Reinsurance (Effect of Reinsura

Reinsurance (Effect of Reinsurance on Net Premiums and Claims and Other Policy Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Premiums Earned, Net [Abstract]
Direct Premiums Earned	$ 58	$ 76	$ 63
Assumed Premiums Earned	12,583	12,150	11,341
Ceded Premiums Earned	(947)	(929)	(860)
Net premiums	11,694	11,297	10,544
Policyholder Benefits and Claims Incurred, Net [Abstract]
Policyholder Benefits and Claims Incurred, Direct	97	113	107
Policyholder Benefits and Claims Incurred, Assumed	11,931	11,404	9,997
Policyholder Benefits and Claims Incurred, Ceded	(953)	(1,320)	(785)
Claims and other policy benefits	$ 11,075	$ 10,197	$ 9,319

Reinsurance (Effect of Reinsu_2

Reinsurance (Effect of Reinsurance on Life Insurance In Force) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reinsurance Disclosures [Abstract]
Reinsurance Premiums for Insurance Companies, by Product Segment, Gross Amount	$ 1,990	$ 1,316	$ 1,363
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Assumed from Other Companies	3,480,692	3,480,206	3,329,181
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	184,625	192,864	186,172
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 3,298,057	$ 3,288,658	$ 3,144,372
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	105.50%	105.80%	105.90%

Reinsurance (Narrative) (Detail

Reinsurance (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Effects of Reinsurance [Line Items]
Maximum Life Insurance Retention Per Individual Life	$ 8
Reinsurance ceded receivables	983	$ 904
Reinsurance Claims Recoverables	278	223
Claims Recoverable From Retrocessionaires Past Due	10	15
Statutory Financial Reinsurance	24,300	22,700
Assets Held-in-trust	572	694
Benefit Of RGA Subsidiaries [Member]
Effects of Reinsurance [Line Items]
Assets Held-in-trust	3,700	3,300
Benefit Of Third Parties [Member]
Effects of Reinsurance [Line Items]
Assets Held-in-trust	$ 27,700	$ 27,300

Deferred Policy Acquisition C_3

Deferred Policy Acquisition Costs (Movement Analysis Of Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost	$ 3,512	$ 3,398	$ 3,240
Deferred Policy Acquisition Cost, Capitalization	478	526	608
Deferred Policy Acquisition Costs, Amortization Expense	(405)	(315)	(438)
Deferred Policy Acquisition Cost, Amortization Expense, Other	22	(15)	14
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses)	(26)	(97)	27
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment	35	15	(53)
Deferred Policy Acquisition Cost	$ 3,616	$ 3,512	$ 3,398

Deferred Policy Acquisition C_4

Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020
Deferred Policy Acquisition Costs Disclosures [Abstract]
Insurance Contract, Acquisition Cost [Text Block]	Some reinsurance agreements involve reimbursing the ceding company for allowances and commissions in excess of first-year premiums. These amounts represent acquisition costs and are capitalized to the extent deemed recoverable from the future premiums and amortized against future profits of the business.

Income Tax (Pre-tax Income Fore

Income Tax (Pre-tax Income Foreign and Domestic) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Domestic									$ 79	$ 871	$ 626
Income (Loss) from Continuing Operations before Income Taxes, Foreign									474	261	220
Income before income taxes	$ 169	$ 285	$ 195	$ (96)	$ 308	$ 347	$ 260	$ 217	$ 553	$ 1,132	$ 846

Income Tax (Provision for Incom

Income Tax (Provision for Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 75	$ (9)	$ 78
Current Federal Tax Expense (Benefit) Relating To US Tax Reform	0	0	(68)
Current Foreign Tax Expense (Benefit)	79	60	43
Current Income Tax Expense (Benefit)	154	51	53
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred Federal Income Tax Expense (Benefit)	(60)	182	63
Deferred Federal Income Tax Expense (Benefit) Related To US Tax Reform	0	0	6
Deferred Foreign Income Tax Expense (Benefit)	44	29	8
Deferred income taxes	(16)	211	77
Income Tax Expense (Benefit)	$ 138	$ 262	$ 130

Income Tax (Provision for Inc_2

Income Tax (Provision for Income Tax Expense Computed from Statutory Rate to Pre-tax Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount	$ (1)	$ (8)	$ (6)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	116	238	178
Tax Adjustments, Settlements, and Unusual Provisions	0	0	(62)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	21	2	4
Income Tax Reconciliation Foreign Income Tax Basis Differential	(32)	(23)	(23)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	10	56	23
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount	10	8	1
Income Tax Reconciliation Change In Foreign Enacted Tax Rate	13	(1)	1
Gilti Net of Credits	13	0	10
Income Tax Reconciliation Subpart F	0	1	1
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	(7)	(6)	(3)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	(4)	(6)	(1)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(1)	1	7
Income Tax Expense (Benefit)	$ 138	$ 262	$ 130
Effective Income Tax Rate Reconciliation, Percent	24.90%	23.10%	15.40%

Income Tax (Total Income Taxes

Income Tax (Total Income Taxes Provided) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Effects Allocated Directly to Equity [Abstract]
Provision for income taxes	$ 138	$ 262	$ 130
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	611	681	(368)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(9)	3	19
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	(1)	(5)	0
Income Tax Expense (Benefit), Intraperiod Tax Allocation	$ 739	$ 941	$ (219)

Income Tax (Tax Effects of Temp

Income Tax (Tax Effects of Temporary Differences that Give Rise to Significant Portions of the Deferred Income Tax Asset and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Net [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	$ 92	$ 95
Deferred Tax Assets, Operating Loss Carryforwards	254	330
Deferred Tax Assets, Tax Credit Carryforwards	0	38
Deferred Tax Assets, Gross	346	463
Deferred Tax Assets, Valuation Allowance	(251)	(236)
Deferred Tax Assets, Net	95	227
Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost	775	675
Deferred Tax Liabilities Reinsurance Transactions	1,105	1,208
Deferred Tax Liabilities, Investments	1,043	645
Deferred Tax Liabilities, Undistributed Foreign Earnings	354	308
Deferred Tax Liabilities, Unrealized Currency Transaction Gains	40	52
Deferred Tax Liabilities, Prepaid Expenses	20	26
Total Deferred Income Tax Liabilities	3,339	2,915
Deferred Tax Liabilities, Net	3,244	2,688
Balance Sheet Presentation Of Deferred Tax Liabilities [Abstract]
Deferred Tax Assets, Other	19	24
Deferred income taxes	3,263	2,712
Deferred Tax Liabilities, Net	3,244	2,688
Deferred Tax Liabilities, Other	$ 2	$ 1

Income Tax Income Tax (Net Oper

Income Tax Income Tax (Net Operating Loss Carryforward) (Details) $ in Millions	Dec. 31, 2020USD ($)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 900
No Expiration And No Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	103
Full Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	131
No Expiration And Partial Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	646
Expiration Dates Between 2029 And 2035 With No Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 20

Income Tax (Reconciliation of t

Income Tax (Reconciliation of the Amount of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Increase Resulting from Acquisition	$ 0	$ 0	$ 1
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits Beginning balance, January 1	333	325	321
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	281	264	256
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(278)	(262)	(257)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	6	6	4
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	0	0	0
Unrecognized Tax Benefits Ending balance, December 31	$ 342	$ 333	$ 325

Income Tax (Narrative) (Details

Income Tax (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	$ 32
Proceeds from Income Tax Refunds	59	$ 22	$ 2
Cash paid for income taxes	167	66	144
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	155
Decrease in Unrecognized Tax Benefits is Reasonably Possible	312
Cash paid for income taxes	167	66	144
Tax Adjustments, Settlements, and Unusual Provisions	0	0	(62)
Deferred Tax Assets, Valuation Allowance	251	236
Proceeds from Income Tax Refunds	59	22	2
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability	2,700	1,600
Subsidiary Net Operating Loss	20	44
Operating Loss Carryforwards	900
Unrecognized Tax Benefits	342	333	325	$ 321
Unrecognized Tax Benefits, Interest on Income Taxes Expense	11	12	$ (3)
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 34	$ 23

Employee Benefit Plans (Schedul

Employee Benefit Plans (Schedule of Changes in Projected Benefit Obligations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	$ 220
Defined Benefit Plan, Benefit Obligation, Ending Balance	254	$ 220
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	220	179
Defined Benefit Plan, Service Cost	14	13	$ 13
Defined Benefit Plan, Interest Cost	6	7	5
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Actuarial Net (Gains) Losses	25	28
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(12)	(8)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	1	1
Defined Benefit Plan, Benefit Obligation, Ending Balance	254	220	179
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	87	67
Defined Benefit Plan, Service Cost	3	3	3
Defined Benefit Plan, Interest Cost	2	3	2
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Actuarial Net (Gains) Losses	(9)	15
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(2)	(1)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	0	0
Defined Benefit Plan, Benefit Obligation, Ending Balance	$ 81	$ 87	$ 67

Employee Benefit Plans (Sched_2

Employee Benefit Plans (Schedule of Changes in Fair Value of Plan Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	$ 133
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	157	$ 133
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(97)	(87)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	133	103
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	18	21
Defined Benefit Plan, Plan Assets, Contributions by Employer	18	17
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(12)	(8)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	157	133
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(97)	(87)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0	0
Defined Benefit Plan, Plan Assets, Contributions by Employer	2	1
Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)	0	0
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)	(2)	(1)
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (81)	$ (87)

Employee Benefit Plans (Sched_3

Employee Benefit Plans (Schedule of Net Funded Status) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 157	$ 133
Defined Benefit Plan, Benefit Obligation		254	220
Defined Benefit Plan, Funded Status of Plan, Total		(97)	(87)
Qualified Plan [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount		157	133
Defined Benefit Plan, Benefit Obligation		160	139
Defined Benefit Plan, Funded Status of Plan, Total		(3)	(6)
Nonqualified Plan [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	0	0
Defined Benefit Plan, Benefit Obligation	[1]	94	81
Defined Benefit Plan, Funded Status of Plan, Total	[1]	$ (94)	$ (81)
[1]	For non-qualified plans, there are no required funding levels.

Employee Benefit Plans (Sched_4

Employee Benefit Plans (Schedule of Amounts Recognized in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	$ 71	$ 59
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs (Credit) Arising During Period, Net of Tax	0	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	71	59
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	29	39
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs (Credit) Arising During Period, Net of Tax	(8)	(9)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	$ 21	$ 30

Employee Benefit Plans (Sched_5

Employee Benefit Plans (Schedule of Projected Benefit Obligations in Excess of Fair Value of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Defined Benefit Plan, Benefit Obligation	$ 254	$ 220
Defined Benefit Plan, Plan Assets, Amount	$ 157	$ 133

Employee Benefit Plans (Sched_6

Employee Benefit Plans (Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	$ 243	$ 212
Defined Benefit Plan, Plan Assets, Amount	$ 157	$ 133

Employee Benefit Plans (Compone

Employee Benefit Plans (Components of Net Periodic Benefit Cost Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	$ (2)	$ (23)	$ 1
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	1	1	1
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Service Cost	14	13	13
Defined Benefit Plan, Interest Cost	6	7	5
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(9)	(7)	(8)
Defined Benefit Plan, Amortization of Gain (Loss)	5	4	4
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost, Total	16	17	14
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	17	14	13
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(5)	(4)	(4)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	0	0	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	0	0	0
Other Comprehensive Income Defined Benefit Plan Net Foreign Exchange Translations And Other Adjustments	0	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	12	10	9
Defined Benefit Plan Net Periodic Benefit Cost And Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Period Increase Decrease	28	27	23
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Defined Benefit Plan, Service Cost	3	3	3
Defined Benefit Plan, Interest Cost	2	3	2
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	2	1	2
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1)	(1)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost, Total	6	6	6
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(8)	14	(7)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(2)	(1)	(2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	1	1	1
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax	0	0	0
Other Comprehensive Income Defined Benefit Plan Net Foreign Exchange Translations And Other Adjustments	0	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(9)	14	(8)
Defined Benefit Plan Net Periodic Benefit Cost And Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Period Increase Decrease	$ (3)	$ 20	$ (2)

Employee Benefit Plans (Sched_7

Employee Benefit Plans (Schedule of Expected Future Benefit Payments) (Details) $ in Millions	Dec. 31, 2020USD ($)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 11
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	14
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	14
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	15
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	16
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	92
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Defined Benefit Plan, Expected Future Benefit Payments in Year One	2
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	2
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	2
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	2
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	3
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	$ 18

Employee Benefit Plans (Sched_8

Employee Benefit Plans (Schedule of Assumptions Used Calculating Benefit Obligations) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.22%	3.05%	4.02%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.03%	4.03%	3.41%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.00%	7.00%	7.35%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.69%	4.61%	4.17%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.41%	3.17%	4.17%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.17%	4.17%	3.56%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	0.00%	0.00%	0.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	0.00%	0.00%	0.00%

Employee Benefit Plans (Sched_9

Employee Benefit Plans (Schedule of Health Care Costs Trend Rates) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	7.00%	8.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%	4.50%
Defined Benefit Plan, Assumed Health Care Cost Trend Rate, Description	2026	2026

Employee Benefit Plans (Sche_10

Employee Benefit Plans (Schedule of Allocation of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020		Dec. 31, 2019
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 157		$ 133
Mutual Funds [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	157	[1]	$ 133	[2]
U.S. Equity Funds [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage			27.00%
U.S. Fixed Income Funds [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage			39.00%
Non-U.S. Equity Funds [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage			18.00%
Other [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage			16.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0		$ 0
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	157		133
Fair Value, Inputs, Level 1 [Member] | Mutual Funds [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	157	[1]	133	[2]
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0		0
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0		0
Fair Value, Inputs, Level 2 [Member] | Mutual Funds [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	[1]	0	[2]
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0		0
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0		0
Fair Value, Inputs, Level 3 [Member] | Mutual Funds [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	[1]	0	[2]
Fair Value, Inputs, Level 3 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0		$ 0
[1]	Mutual funds were invested 27% in U.S. equity funds, 39% in U.S. fixed income funds, 18% in non-U.S. equity funds and 16% in other.
[2]	Mutual funds were invested 27% in U.S. equity funds, 39% in U.S. fixed income funds, 18% in non-U.S. equity funds and 16% in other.

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	$ 243	$ 212
Defined Contribution Plan, Cost	19	16	$ 15
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	16	17	14
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	18
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	6	$ 6	$ 6
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 2
Debt Securities [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	40.00%
Equity Securities [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities	60.00%

Financial Condition and Net I_3

Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries (Statutory Accounting Practices Disclosure) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
RGA Reinsurance [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	$ 2,136	$ 2,125
Statutory Accounting Practices, Statutory Net Income Amount	4	75	$ (25)
RCM [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	2,131	2,150
Statutory Accounting Practices, Statutory Net Income Amount	(133)	280	660
RGA Canada [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	886	713
Statutory Accounting Practices, Statutory Net Income Amount	152	(225)	(38)
RGA Barbados [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	1,835	1,553
Statutory Accounting Practices, Statutory Net Income Amount	268	234	49
RGA Australia [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	535	447
Statutory Accounting Practices, Statutory Net Income Amount	42	15	(37)
RGA Atlantic [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	1,460	1,087
Statutory Accounting Practices, Statutory Net Income Amount	52	37	21
RGA International Reinsurance Company dac [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	1,441	1,511
Statutory Accounting Practices, Statutory Net Income Amount	175	243	256
RGA Americas [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	8,249	6,283
Statutory Accounting Practices, Statutory Net Income Amount	879	1,049	209
Other Reinsurance Subsidiaries [Member]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	2,496	2,233
Statutory Accounting Practices, Statutory Net Income Amount	$ 357	$ 291	$ 324

Financial Condition and Net I_4

Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries (Reconciliation of NAIC SAP and Prescribed Practice) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Statutory Basis [Abstract]
Prescribed Practice Surplus Note	$ 577	$ 652
Prescribed Practice Letters Of Credit	(461)	(576)
Surplus Deficit NAIC SAP	$ 116	$ 76

Financial Condition and Net I_5

Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Statutory Basis [Abstract]
Number Of Preceeding Months To Accumulate Dividend Paid For Approval	12 months
Future Dividend Payment Restricted To Such Percent Of Surplus To Policy Holders	10.00%
RGA Reinsurance Max Dividend Payments Without Approval	$ 213

Commitments Contingencies and_3

Commitments Contingencies and Guarantees (Commitments to Fund Investments) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Limited Partner [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 678	$ 685
Commercial Loan [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	199	243
Bank Loan Obligations [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	194	181
Equity Release Mortgages [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 43	$ 87

Commitments Contingencies and_4

Commitments Contingencies and Guarantees (Maximum Potential Obligation) (Details) $ in Millions	Dec. 31, 2020USD ($)
Commitment Period Two Thousand Thirty Five [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 2,666
Commitment Period Two Thousand Thirty Six [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	3,599
Commitment Period Two Thousand Thirty Seven [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,850
Commitment Period Two Thousand Thirty Eight [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,300
Commitment Period Two Thousand Thirty Nine [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	11,350
Commitment Period Two Thousand Thirty Four
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,243

Commitments Contingencies and_5

Commitments Contingencies and Guarantees (Guarantees Issued) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Insurance Treaty Guarantee [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 1,934	$ 1,821
Insurance Treaty Guarantee Net Of Assets Held In Trust [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	961	891
Guarantee Of Borrowed Securities [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	133	275
Product Financing Arrangement [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 0	$ 42

Commitments Contingencies and_6

Commitments Contingencies and Guarantees (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)
Commitments and Contingencies Disclosure [Abstract]
Maximum Capital Lease Obligations As Offset Against Industrial Bonds	$ 150
Liability For Expected Credit Losses Included in Other Liabilities	$ 2

Debt (Schedule of Long-term Deb

Debt (Schedule of Long-term Debt Instruments) (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2006
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 3,597,000,000	$ 3,003,000,000
Debt Issuance Cost	24,000,000	22,000,000
Debt Instrument, Face Amount			$ 850,000,000
Long-term debt	3,573,000,000	2,981,000,000
Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.45%
Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 400,000,000	400,000,000
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 399,000,000	399,000,000
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.70%
Senior Notes Due 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 400,000,000	400,000,000
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Senior Notes Due 2029 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 599,000,000	599,000,000
Debt Instrument, Face Amount	$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.90%
Subordinated Debentures Due 2042 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 400,000,000	400,000,000
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.20%
Subordinated Debentures Due 2056 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 400,000,000	400,000,000
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Junior Subordinated Debentures Due 2065 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 319,000,000	319,000,000
Debt Instrument, Face Amount	$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.82%
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 83,000,000	86,000,000
Debt Instrument, Face Amount	$ 100,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.09%
Senior Notes Due 2030
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 597,000,000	$ 0
Debt Instrument, Face Amount	$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.15%

Debt (Repayments of Debt) (Deta

Debt (Repayments of Debt) (Details) $ in Millions	Dec. 31, 2020USD ($)
Debt Disclosure [Abstract]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 403
Long-term Debt, Maturities, Repayments of Principal in Year Two	3
Long-term Debt, Maturities, Repayments of Principal in Year Three	403
Long-term Debt, Maturities, Repayments of Principal in Year Four	3
Long-term Debt, Maturities, Repayments of Principal in Year Five	4
Long-term Debt, Maturities, Repayments of Principal after Year Five	$ 2,787

Debt (Schedule of Line of Credi

Debt (Schedule of Line of Credit Facilities) (Details) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,132
Syndicated Credit Facility $850 Million [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		850
Long-term Line of Credit	[1]	$ 21	$ 20
Line of Credit Facility, Interest Rate Description		Senior unsecured long-term debt rating
Credit Facility 100 Million [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Long-term Line of Credit	[1]	$ 75	61
Line of Credit Facility, Interest Rate Description		Fixed
Syndicated Credit Facility $75 Million [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 75
Long-term Line of Credit	[1]	$ 51	15
Line of Credit Facility, Interest Rate Description		Fixed
Foreign Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[2]	$ 100
Long-term Line of Credit	[1],[2]	$ 100	105
Line of Credit Facility, Interest Rate Description	[2]	Fixed
Syndicated Credit Facility $500 Million [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 500
Long-term Line of Credit	[1]	$ 210	375
Line of Credit Facility, Interest Rate Description		Debt rating and utilization %
Credit Facility $150 Million
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 150
Long-term Line of Credit	[1]	$ 150	0
Line of Credit Facility, Interest Rate Description		Fixed
Credit Facility $100 Million 2021
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Long-term Line of Credit	[1]	$ 100	0
Line of Credit Facility, Interest Rate Description		Fixed
Credit Facility $107 Million
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 107
Long-term Line of Credit	[1]	$ 107	$ 99
Line of Credit Facility, Interest Rate Description		Fixed
[1]	Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.
[2]	Foreign currency denominated facility, amounts presented are in U.S. dollars.

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2006
Debt Instrument [Line Items]
Debt Issuance Cost		$ 24,000,000	$ 22,000,000
Undrawn Outstanding Letters Of Credit In Favor Of Third Parties		23,000,000	62,000,000
Undrawn Outstanding Letters Of Credit Between Subsidiaries		1,508,000,000	$ 1,224,000,000
Debt Instrument, Face Amount					$ 850,000,000
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,132,000,000
Debt, Weighted Average Interest Rate		4.54%	4.82%
Long-term Debt, Gross		$ 3,597,000,000	$ 3,003,000,000
Long-term debt		3,573,000,000	2,981,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four		3,000,000
Line of Credit Facility, Commitment Fee Amount		$ 10,000,000	8,000,000	$ 10,000,000
Senior Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.95%
Debt Instrument, Face Amount		$ 400,000,000
Long-term Debt, Gross		$ 400,000,000	400,000,000
Subordinated Debentures Due 2056 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.75%
Debt Instrument, Face Amount		$ 400,000,000
Long-term Debt, Gross		$ 400,000,000	400,000,000
Junior Subordinated Debentures Due 2065 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.82%
Debt Instrument, Face Amount		$ 400,000,000
Long-term Debt, Gross		$ 319,000,000	319,000,000
Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.00%
Debt Instrument, Face Amount		$ 400,000,000
Long-term Debt, Gross		$ 400,000,000	400,000,000
Subordinated Debentures Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.20%
Debt Instrument, Face Amount		$ 400,000,000
Long-term Debt, Gross		$ 400,000,000	400,000,000
Senior Notes Due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.70%
Debt Instrument, Face Amount		$ 400,000,000
Long-term Debt, Gross		$ 399,000,000	399,000,000
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.09%
Debt Instrument, Face Amount		$ 100,000,000
Long-term Debt, Gross		$ 83,000,000	86,000,000
Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.45%
Debt Instrument, Face Amount		$ 400,000,000
Senior Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.90%
Debt Instrument, Face Amount		$ 600,000,000
Long-term Debt, Gross		$ 599,000,000	599,000,000
Debt Instrument, Offering Date		May 15, 2019
Proceeds from Debt, Net of Issuance Costs		$ 594,000,000
Debt Related Commitment Fees and Debt Issuance Costs		$ 5,000,000
Senior Notes Due 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.15%
Debt Instrument, Face Amount		$ 600,000,000
Long-term Debt, Gross		$ 597,000,000	0
Debt Instrument, Offering Date		Jun. 9, 2020
Proceeds from Debt, Net of Issuance Costs		$ 593,000,000
Debt Related Commitment Fees and Debt Issuance Costs		5,000,000
Syndicated Credit Facility $850 Million [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		850,000,000
Long-term Line of Credit	[1]	21,000,000	$ 20,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 932,000,000
[1]	Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.

Debt (Senior Note Offering) (Na

Debt (Senior Note Offering) (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2006
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 850,000,000
Senior Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Offering Date	May 15, 2019
Debt Instrument, Interest Rate, Stated Percentage	3.90%
Debt Instrument, Face Amount	$ 600,000,000
Proceeds from Debt, Net of Issuance Costs	594,000,000
Debt Related Commitment Fees and Debt Issuance Costs	$ 5,000,000
Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.45%
Debt Instrument, Face Amount	$ 400,000,000

Collateral Finance and Securi_3

Collateral Finance and Securitization Notes Collateral Finance and Securitization Notes (List of Collateral Finance and Securitization Notes) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Collateralized Financings	$ 388	$ 598
Debt Issuance Cost	(24)	(22)
Timerberlake Financial [Member]
Collateralized Financings	247	313
Reinsurance Group Of America Barbados [Member]
Collateralized Financings	0	127
Chesterfield Financial Holdings LLC [Member]
Collateralized Financings	143	161
Secured Debt [Member]
Debt Issuance Cost	$ (2)	$ (3)

Collateral Finance and Securi_4

Collateral Finance and Securitization Notes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2006
Collateral Finance Facility [Line Items]
Debt Instrument, Face Amount				$ 850,000,000
Direct investment in subsidiary				$ 113,000,000
Assets Held-in-trust	$ 572,000,000	$ 694,000,000
Amount Held In Debt Service Coverage Account	40,000,000	58,000,000
Collateral Financing Expense	17,000,000	29,000,000	$ 30,000,000
Debt Issuance Cost	24,000,000	22,000,000
Reinsurance Group Of America Barbados [Member]
Collateral Finance Facility [Line Items]
Collateral Financing Expense	2,000,000	5,000,000	5,000,000
Timerberlake Financial [Member]
Collateral Finance Facility [Line Items]
Collateral Financing Expense	3,000,000	9,000,000	9,000,000
Chesterfield Financial Holdings LLC [Member]
Collateral Finance Facility [Line Items]
Debt Instrument, Face Amount	300,000,000
Assets Held-in-trust	10,000,000	15,000,000
Collateral Financing Expense	$ 7,000,000	$ 8,000,000	$ 10,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.50%

Segment Information (Reconcilia

Segment Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 4,143	$ 3,643	$ 3,606	$ 3,204	$ 3,785	$ 3,628	$ 3,467	$ 3,420	$ 14,596	$ 14,300	$ 12,876
Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									7,780	7,779	7,203
Canada Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,352	1,385	1,273
EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									2,104	1,970	1,845
Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									3,115	2,909	2,471
Corporate And Other Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									245	257	84
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									6,560	6,500	6,296
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,260	1,286	1,224
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,633	1,520	1,495
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									2,806	2,681	2,417
Insurance, Other [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,220	1,279	907
Insurance, Other [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									92	99	49
Insurance, Other [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									471	450	350
Insurance, Other [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									$ 309	$ 228	$ 54

Segment Information (Reconcil_2

Segment Information (Reconciliation of Income before Income Taxes from Segments to Consolidated) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 169	$ 285	$ 195	$ (96)	$ 308	$ 347	$ 260	$ 217	$ 553	$ 1,132	$ 846
Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									(3)	663	537
Canada Segment Reporting Information [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									155	183	122
EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									285	303	252
Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									233	128	172
Corporate And Other Segment Reporting Information [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									(117)	(145)	(237)
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									(298)	265	286
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									134	168	112
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									27	80	55
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									174	105	178
Insurance, Other [Member] | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									295	398	251
Insurance, Other [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									21	15	10
Insurance, Other [Member] | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									258	223	197
Insurance, Other [Member] | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest									$ 59	$ 23	$ (6)

Segment Information (Reconcil_3

Segment Information (Reconciliation of Interest Expense from Segments to Consolidated) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Interest expense	$ 170	$ 173	$ 147
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Interest expense	$ 170	$ 173	$ 147

Segment Information (Reconcil_4

Segment Information (Reconciliation of Depreciation and Amortization from Segment to Consolidated) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	$ 589	$ 609	$ 574
Americas [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	381	434	368
Canada Segment Reporting Information [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	24	20	22
EMEA [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	47	57	45
Asia Pacific [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	114	76	117
Corporate And Other Segment Reporting Information [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	23	22	22
Life Insurance Product Line [Member] | Americas [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	291	291	273
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	24	20	22
Life Insurance Product Line [Member] | EMEA [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	46	56	45
Life Insurance Product Line [Member] | Asia Pacific [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	94	60	115
Insurance, Other [Member] | Americas [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	90	143	95
Insurance, Other [Member] | Canada Segment Reporting Information [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	0	0	0
Insurance, Other [Member] | EMEA [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	1	1	0
Insurance, Other [Member] | Asia Pacific [Member]
Depreciation, Depletion and Amortization [Abstract]
Depreciation, Depletion and Amortization, Nonproduction	$ 20	$ 16	$ 2

Segment Information (Reconcil_5

Segment Information (Reconciliation of Assets from Segment to Consolidated) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 84,656	$ 76,731
Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	45,504	44,470
Canada Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,695	4,425
EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	12,055	10,534
Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	12,496	9,357
Corporate And Other Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	9,906	7,945
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	20,071	19,353
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,682	4,361
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,763	4,032
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	8,197	6,800
Insurance, Other [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	25,433	25,117
Insurance, Other [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	13	64
Insurance, Other [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	7,292	6,502
Insurance, Other [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 4,299	$ 2,557

Policy Claims and Benefits (Cla

Policy Claims and Benefits (Claims Development) (Details) - Life Insurance Product Line [Member] - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	[1]	Dec. 31, 2018	[1]	Dec. 31, 2017	[1]	Dec. 31, 2016	[1]	Dec. 31, 2015	[1]	Dec. 31, 2014	[1]	Dec. 31, 2013	[1]	Dec. 31, 2012	[1]
Claims Development [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net		$ 1,594
Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		1,809
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented		90
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		2,525
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net		806
Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		3,303
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented		131
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	[1]	3,960
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net		788
Short-duration Insurance Contracts, Accident Year 2012 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		318	$ 310		$ 300		$ 284		$ 266		$ 243		$ 202		$ 148		$ 54
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		345	343		338		332		321		313		309		305		227
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		5
Short-duration Insurance Contracts, Accident Year 2012 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		275	272		268		264		258		252		244		222		109
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		296	297		297		298		299		298		297		309		$ 323
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		332	322		309		285		258		229		157		54
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		359	361		358		343		329		332		342		320
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		7
Short-duration Insurance Contracts, Accident Year 2013 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		305	302		297		292		286		277		249		114
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		335	337		336		336		337		339		333		$ 349
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		276	265		250		225		194		148		38
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		313	312		310		296		290		328		302
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		9
Short-duration Insurance Contracts, Accident Year 2014 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		368	364		356		349		337		305		129
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		399	399		396		397		396		411		$ 408
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		255	242		221		183		129		53
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		292	291		292		273		281		304
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		14
Short-duration Insurance Contracts, Accident Year 2015 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		437	431		422		407		361		146
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		463	462		462		465		461		$ 460
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		182	167		145		107		42
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		240	240		232		225		248
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		15
Short-duration Insurance Contracts, Accident Year 2016 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		460	451		437		393		185
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		497	497		501		500		$ 501
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		0
Short-duration Insurance Contracts, Accident Year 2017 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		149	126		95		39
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		237	234		234		232
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		21
Short-duration Insurance Contracts, Accident Year 2017 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		462	448		403		190
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		504	509		514		$ 485
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		3
Short-duration Insurance Contracts, Accident Year 2018 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		160	116		35
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		290	295		277
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		50
Short-duration Insurance Contracts, Accident Year 2018 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		465	415		183
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		524	538		$ 538
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		8
Short-Duration Insurance Contract, Accident Year 2019 [Member] | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		111	42
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		286	277
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		82
Short-Duration Insurance Contract, Accident Year 2019 [Member] | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		372	180
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		473	$ 491
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		30
Short-Duration Insurance Contract, Accident Year 2020 | Asia Pacific [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		26
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		163
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		84
Short-Duration Insurance Contract, Accident Year 2020 | Americas [Member]
Claims Development [Line Items]
Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net		159
Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net		469
Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net		$ 197
[1]	2012-2019 Unaudited.

Policy Claims and Benefits Poli

Policy Claims and Benefits Policy Claims and Benefits (Schedule of Historical Claims Duration) (Details) - Life Insurance Product Line [Member]	Dec. 31, 2020
Americas [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Year One	35.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	42.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	8.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	2.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	1.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	1.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	1.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	1.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	1.20%
Asia Pacific [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Year One	15.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	27.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	16.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	10.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	7.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	5.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	4.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	2.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	2.40%

Policy Claims and Benefits (Rec

Policy Claims and Benefits (Reconciliation of Claims Development to Liability) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	$ 641	$ 564	$ 433	$ 456
Short-duration Insurance Contract, Discounted Liability, Discount	101
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item	2,447
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Aggregate Reconciling Items	5,109
Liability for Claims and Claims Adjustment Expense	7,556	$ 6,786	$ 6,585	$ 5,896
Canada Segment Reporting Information [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item	90
EMEA [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item	587
Corporate And Other Segment Reporting Information [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item	277
Life Insurance Product Line [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	1,594
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	12
Short-duration Insurance Contract, Discounted Liability, Discount for Reinsurance	(120)
Short-duration Insurance Contracts, Liability for Unpaid Claims and Claims Adjustment Expense, Accumulated Unallocated Claim Adjustment Expense	7
Life Insurance Product Line [Member] | Asia Pacific [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	806
Life Insurance Product Line [Member] | Americas [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	$ 788

Policy Claims and Benefits Po_2

Policy Claims and Benefits Policy Claims and Benefits (Rollforward of Claims and Claim Adjustment Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Liability for Claims and Claims Adjustment Expense Beginning Balance	$ 6,786	$ 6,585	$ 5,896
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments, Beginning Balance	(564)	(433)	(456)
Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable, Beginning Balance	6,222	6,152	5,440
Current Year Claims and Claims Adjustment Expense	11,195	10,307	10,049
Prior Year Claims and Claims Adjustment Expense	123	154	131
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	11,318	10,461	10,180
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year	(5,617)	(5,140)	(4,602)
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	(5,204)	(5,305)	(4,692)
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	(10,821)	(10,445)	(9,294)
Interest On Liability For Policy And Contract Claims	36	33	25
Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss)	160	21	(199)
Liability for Unpaid Claims and Claims Adjustment Expense Other	196	54	(174)
Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable, Ending Balance	6,915	6,222	6,152
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments, Ending Balance	641	564	433
Liability for Claims and Claims Adjustment Expense, Ending Balance	$ 7,556	$ 6,786	$ 6,585

Equity Equity (Common Stock Cha

Equity Equity (Common Stock Changes in Number of Shares Issued, Held in Treasury and Oustanding) (Details) - shares		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common Stock, Shares, Issued		85,310,598	79,137,758
Stock Issued During Period, Shares, New Issues		6,172,840
Common Stock Issuable [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		85,310,598	79,137,758	79,137,758	79,137,758
Stock Issued During Period, Shares, New Issues		6,172,840
Stock Based Compensation Shares	[1]	0	0	0
Treasury Stock, Shares, Acquired		0	0	0
Common Stock Held In Treasury [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		17,353,697	16,481,656	16,323,390	14,685,663
Stock Issued During Period, Shares, New Issues		0
Stock Based Compensation Shares	[1]	(202,372)	(388,348)	(294,328)
Treasury Stock, Shares, Acquired		(1,074,413)	(546,614)	(1,932,055)
Common Stock Outstanding [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		67,956,901	62,656,102	62,814,368	64,452,095
Stock Issued During Period, Shares, New Issues		6,172,840
Stock Based Compensation Shares	[1]	(202,372)	(388,348)	(294,328)
Treasury Stock, Shares, Acquired		(1,074,413)	(546,614)	(1,932,055)
[1]	Represents net shares issued from treasury pursuant to the Company’s stock-based compensation programs.

Equity Equity (Share Repurchase

Equity Equity (Share Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method	$ 163	$ 101	$ 300
Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	1,074,413	546,614
Treasury Stock, Value, Acquired, Cost Method	$ 153	$ 80
Treasury Stock Acquired, Average Cost Per Share	$ 142.05	$ 146

Equity (Components of Other Com

Equity (Components of Other Comprehensive Income) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax		$ 43	$ 113	$ (148)
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax		3	(10)	(1)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax		46	103	(149)
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap, Before Reclassification and Tax		(29)	(33)	87
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Tax		6	7	(18)
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Foreign Currency Swap Net Of Tax		(23)	(26)	69
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax		14	80	(61)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax		9	(3)	(19)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		23	77	(80)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax	[1]	2,812	3,208	(1,834)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax	[1]	(614)	(698)	394
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax	[1]	2,198	2,510	(1,440)
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax	[1]	(8)	84	(122)
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Tax	[1]	(1)	(17)	26
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Net of Tax	[1]	(9)	67	(96)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments and Tax	[1]	2,820	3,124	(1,712)
Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax	[1]	(613)	(681)	368
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax	[1]	2,207	2,443	(1,344)
Other than Temporary Impairment Loss, Investments, Portion in Other Comprehensive Loss, before Tax, Portion Attributable to Parent, Available-for-sale Securities		(8)	0	0
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Tax, Portion Attributable to Parent, Available-for-sale Securities		2	0	0
Change in other-than-temporary impairment losses on fixed maturity securities		(6)	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		(1)	(1)	(1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax		0	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax		(1)	(1)	(1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax		(2)	(23)	1
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax		1	5	0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax		(1)	(18)	1
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax		(3)	(24)	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax		1	5	0
Defined benefit pension and postretirement plan adjustments		(2)	(19)	0
Other Comprehensive Income (Loss), before Tax		2,823	3,180	(1,773)
Other Comprehensive Income (Loss), Tax		(601)	(679)	349
Other Comprehensive Income (Loss), Net of Tax		$ 2,222	$ 2,501	$ (1,424)
[1]	Includes cash flow hedges. See Note 5 for additional information on cash flow hedges.

Equity (Components of Net Unrea

Equity (Components of Net Unrealized Appreciation Depreciation of Balances Carried at Fair Value) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Comprehensive Income Net Of Tax [Line Items]
Fixed maturity securities available-for-sale		$ (56,735)	$ (51,121)
Other invested assets		(2,829)	(2,363)
Deferred policy acquisition costs		3,616	3,512	$ 3,398	$ 3,240
Accumulated Other Comprehensive Income Loss Change In Component During Period		2,812	3,123	(1,712)
Change In Net Unrealized Appreciation Depreciation [Member]
Comprehensive Income Net Of Tax [Line Items]
Fixed maturity securities available-for-sale		(2,837)	(3,258)	(1,759)
Other invested assets	[1]	(29)	(37)	(20)
Effect On Unrealized Appreciation Depreciation [Member]
Comprehensive Income Net Of Tax [Line Items]
Deferred policy acquisition costs		$ 54	$ 98	$ 27
[1]	Includes cash flow hedges. See Note 5 for additional information on cash flow hedges.

Equity (Balance of and Changes

Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		$ 3,137	$ 636	$ 2,064
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		2,859	3,358	(1,926)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(36)	(178)	153
Other Comprehensive Income (Loss), Tax		(601)	(679)	349
Balance, end of year		5,359	3,137	636
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		(92)	(169)	(86)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		14	80	(60)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0	0	0
Other Comprehensive Income (Loss), Tax		9	(3)	(19)
Balance, end of year		(69)	(92)	(169)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year	[1]	3,299	856	2,201
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	[1]	2,854	3,306	(1,861)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	[1]	42	182	(148)
Other Comprehensive Income (Loss), Tax	[1]	(611)	(681)	368
Balance, end of year	[1]	5,500	3,299	856
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance, beginning of year		(70)	(51)	(51)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(9)	(28)	(5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(6)	(4)	(5)
Other Comprehensive Income (Loss), Tax		1	5	0
Balance, end of year		(72)	(70)	(51)
Accounting Standards Update 2018-02 [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Stockholders' Equity, Other		$ (12)	$ 0	(3)
Accounting Standards Update 2018-02 [Member] | Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Stockholders' Equity, Other				(4)
Accounting Standards Update 2018-02 [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Stockholders' Equity, Other	[1]			0
Accounting Standards Update 2018-02 [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Stockholders' Equity, Other				0
Accounting Standards Update 2018-02 [Member] | Accumulated Other Comprehensive Income Member
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Stockholders' Equity, Other				$ (4)
[1]	Includes cash flow hedges of $(49), $(26) and $9 as of December 31, 2020, 2019 and 2018, respectively. See Note 5 for additional information on cash flow hedges.

Equity Equity (Balance of and C

Equity Equity (Balance of and Changes in Each Component of AOCI) (Footnote) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ (49)	$ (26)	$ 9	$ 3

Equity (Schedule of Reclassific

Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other investment related gains (losses), net										$ (12)	$ 122	$ (142)
Investment income, net of related expenses										2,575	2,520	2,139
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses)										26	97	(27)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax										1	1	1
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax										2	23	(1)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest		$ 169	$ 285	$ 195	$ (96)	$ 308	$ 347	$ 260	$ 217	553	1,132	846
Income Tax Expense (Benefit)										(138)	(262)	(130)
Net Income (Loss) Attributable to Parent		$ 132	$ 213	$ 158	$ (88)	$ 235	$ 263	$ 202	$ 170	415	870	$ 716
Amortization Of Unrealized Pension And Postretirement Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	[1]									1	(1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	[1]									(7)	(5)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest										(6)	(4)
Income Tax Expense (Benefit)										1	1
Net Income (Loss) Attributable to Parent										(5)	(3)
Unrealized Appreciation Depreciation Of Investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other investment related gains (losses), net										(8)	84
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses)	[2]									54	97
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest										42	182
Income Tax Expense (Benefit)										(12)	(38)
Net Income (Loss) Attributable to Parent										30	144
Amounts Reclassified From AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Income (Loss) Attributable to Parent										25	141
Interest Rate Options [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] | Unrealized Appreciation Depreciation Of Investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[3]									(4)	1
Currency Swap [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] | Unrealized Appreciation Depreciation Of Investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[3]									0	0
Forward Contracts [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] | Unrealized Appreciation Depreciation Of Investments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[3]									$ 0	$ 0
[1]	See Note 10 for information on employee benefit plans.
[2]	See Note 8 for information on deferred policy acquisition costs.
[3]	See Note 5 for information on cash flow hedges.

Equity (Narrative) (Details)

Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Stock Repurchase Program, Authorized Amount	$ 400
Treasury Stock, Value, Acquired, Cost Method	163	$ 101	$ 300
Proceeds from Issuance of Common Stock	$ 481	$ 0	$ 0
Stock Issued During Period, Shares, New Issues	6,172,840
Shares Issued, Price Per Share	$ 81
Common stock par value	$ 0.01
Common Stock Issued Underwriter Option	925,926
Common Stock Price Per Share Underwriter Option	$ 81

Equity Based Compensation (Disc

Equity Based Compensation (Disclosure of Share-based Compensation Arrangements by Share-based Payment Award) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options, Grants in Period, Weighted Average Exercise Price	$ 117.85		$ 145.25	$ 150.87
Options, Outstanding, Intrinsic Value	$ 43.5
Options, Exercisable, Intrinsic Value	$ 43.5
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Number, Beginning Balance	325,851
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	175,047
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	(138,785)		(248,789)
Forfeited	(3,137)
Outstanding, Number, Ending Balance	291,129	[1]	325,851
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options, Grants in Period, Weighted Average Exercise Price	$ 117.85
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period	(67,847)
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Number, Beginning Balance	62,194
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	37,135
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	(20,232)
Forfeited	(2,707)
Outstanding, Number, Ending Balance	76,390	[1]	62,194
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period	0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Number, Beginning Balance	2,031,797
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	455,455
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	(312,345)
Forfeited	(6,512)
Outstanding, Number, Ending Balance	2,168,395		2,031,797
Options exercisable	1,695,704
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 92.63
Options, Grants in Period, Weighted Average Exercise Price	117.96
Exercised / Lapsed	61.70
Forfeited	126.50
Options, Outstanding, Weighted Average Exercise Price, End of Period	102.30		$ 92.63
Options exercisable	$ 95.68
[1]	Amount outstanding at December 31, 2020, includes the amount of shares to be issued under RSUs expected to vest and number of shares to be issued under PCUs at target performance. The PCU amount of shares do not reflect potential increases or decreases that may result from the performance factor, except for the 2018 – 2020 PCU grants, which vested as of December 31, 2020.

Equity Based Compensation (Di_2

Equity Based Compensation (Disclosure of Share-based Compensation Shares Authorized under Stock Option Plans by Exercise Price Range) (Details)	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding | shares	2,168,395
Options Outstanding, Weighted-Average Remaining Contractual Life	5 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 102.30
Options Exercisable | shares	1,695,704
Options Exercisable, Weighted-Average Exercise Price	$ 95.68
$50.00 - $59.99 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding | shares	503,239
Options Outstanding, Weighted-Average Remaining Contractual Life	2 years
Options Outstanding, Weighted Average Exercise Price	$ 62.41
Options Exercisable | shares	503,239
Options Exercisable, Weighted-Average Exercise Price	$ 62.41
Exercise Price Range, Lower Range Limit	50
Exercise Price Range, Upper Range Limit	$ 89.99
$60.00 - $69.99 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding | shares	711,645
Options Outstanding, Weighted-Average Remaining Contractual Life	4 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 92.55
Options Exercisable | shares	711,645
Options Exercisable, Weighted-Average Exercise Price	$ 92.55
Exercise Price Range, Lower Range Limit	90
Exercise Price Range, Upper Range Limit	$ 99.99
$70.00 - $79.99 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding | shares	608,599
Options Outstanding, Weighted-Average Remaining Contractual Life	8 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 120.90
Options Exercisable | shares	269,284
Options Exercisable, Weighted-Average Exercise Price	$ 124.74
Exercise Price Range, Lower Range Limit	100
Exercise Price Range, Upper Range Limit	$ 139.99
$90.00 plus [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding | shares	344,912
Options Outstanding, Weighted-Average Remaining Contractual Life	7 years 8 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 147.80
Options Exercisable | shares	211,536
Options Exercisable, Weighted-Average Exercise Price	$ 148.37
Exercise Price Range, Lower Range Limit	$ 140

Equity Based Compensation (Weig

Equity Based Compensation (Weighted Average Assumptions) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	2.37%	1.65%	1.33%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.69%	2.67%	2.79%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	18.80%	18.20%	21.40%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	7 years	6 years	7 years
Options, Grants in Period, Weighted Average Exercise Price	$ 117.85	$ 145.25	$ 150.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 15.14	$ 26.59	$ 36.31

Equity Based Compensation (Summ

Equity Based Compensation (Summary of Performance Contingent Unit Activity) (Details) - shares	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period	(67,847)
Outstanding, Number, Beginning Balance	325,851
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	175,047
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	138,785		248,789
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	3,137
Outstanding, Number, Ending Balance	291,129	[1]	325,851
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period	0
Outstanding, Number, Beginning Balance	62,194
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	37,135
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	20,232
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	2,707
Outstanding, Number, Ending Balance	76,390	[1]	62,194
[1]	Amount outstanding at December 31, 2020, includes the amount of shares to be issued under RSUs expected to vest and number of shares to be issued under PCUs at target performance. The PCU amount of shares do not reflect potential increases or decreases that may result from the performance factor, except for the 2018 – 2020 PCU grants, which vested as of December 31, 2020.

Equity Based Compensation (Narr

Equity Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Document Period End Date	Dec. 31, 2020
Options, Exercises in Period, Total Intrinsic Value	$ 15	$ 31	$ 26
Performance Contingent Unit Share Payout	1.32	1.35
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 2 months 12 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 6.2
Share-based Payment Arrangement, Expense	$ (12)	$ 39	$ 30
Options, Grants in Period, Weighted Average Exercise Price	$ 117.85	$ 145.25	$ 150.87
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	312,345
Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	455,455
Options, Grants in Period, Weighted Average Exercise Price	$ 117.96
Flexible Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Of Shares Available For Grant	14,960,077
Flexible Stock Plan For Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Of Shares Available For Grant	412,500
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	138,785	248,789
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	175,047
Options, Grants in Period, Weighted Average Exercise Price	$ 117.85
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	20,232
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	37,135

Quarterly Results of Operatio_3

Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 4,143	$ 3,643	$ 3,606	$ 3,204	$ 3,785	$ 3,628	$ 3,467	$ 3,420	$ 14,596	$ 14,300	$ 12,876
Total benefits and expenses	3,974	3,358	3,411	3,300	3,477	3,281	3,207	3,203	14,043	13,168	12,030
Income before income taxes	169	285	195	(96)	308	347	260	217	553	1,132	846
Net Income (Loss) Attributable to Parent	$ 132	$ 213	$ 158	$ (88)	$ 235	$ 263	$ 202	$ 170	$ 415	$ 870	$ 716
Basic earnings per share:
Earnings Per Share, Basic (in dollars per share)	$ 1.95	$ 3.13	$ 2.49	$ (1.41)	$ 3.75	$ 4.19	$ 3.23	$ 2.70	$ 6.35	$ 13.88	$ 11.25
Earnings Per Share, Diluted (in dollars per share)	$ 1.94	$ 3.12	$ 2.48	$ (1.41)	$ 3.68	$ 4.12	$ 3.18	$ 2.65	$ 6.31	$ 13.62	$ 11

Summary of Investments Other _3

Summary of Investments Other Than Investments in Related Parties (Details) $ in Millions	Dec. 31, 2020USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	$ 65,236
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	72,400	[1]
Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	49,548
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	56,735
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	56,735	[1]
US Treasury and Government [Member] | Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	1,242
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	1,437
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	1,437	[1]
US States and Political Subdivisions Debt Securities [Member] | Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	1,237
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	1,390
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	1,390	[1]
Foreign Government Debt [Member] | Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	8,482	[2]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	10,923	[2]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	10,923	[1],[2]
Public Utility, Bonds [Member] | Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	3,904
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	4,537
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	4,537	[1]
Asset-backed Securities [Member] | Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	6,624
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	6,777
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	6,777	[1]
All Other Corporate Bonds [Member] | Fixed Maturities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	28,059
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	31,671
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	31,671	[1]
Equity Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	155
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value	132
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	132	[1]
Mortgage Loans on Real Estate [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	5,787
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	5,787	[1]
Policy Loans [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	1,258
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	1,258	[1]
Funds Withheld At Interest [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	5,432
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	5,432	[1]
Short-term Investments [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	227
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	227	[1]
Other Invested Assets [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost	2,829
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount	$ 2,829	[1]
[1]	Fixed maturity securities are classified as available-for-sale and carried at fair value.
[2]	Includes fixed maturities directly issued by foreign governments, supranational and foreign government-sponsored enterprises.

Condensed Financial Informati_3

Condensed Financial Information of The Registrant (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2006
Assets
Fixed maturity securities available-for-sale													$ 56,735,000,000	$ 51,121,000,000
Short-term investments													227,000,000	64,000,000
Cash and cash equivalents		$ 3,408,000,000			$ 1,449,000,000	$ 1,449,000,000			$ 1,890,000,000	$ 3,408,000,000	$ 1,890,000,000	$ 1,304,000,000	3,408,000,000	1,449,000,000	$ 1,890,000,000	$ 1,304,000,000
Other assets													896,000,000	878,000,000
Total assets													84,656,000,000	76,731,000,000
Liabilities and Stockholders’ Equity
Other liabilities													1,340,000,000	1,188,000,000
Total stockholders equity													14,352,000,000	11,601,000,000	8,450,000,000	9,570,000,000
Total liabilities and stockholders’ equity													84,656,000,000	76,731,000,000
CONSOLIDATED STATEMENTS OF INCOME
Total investment related gains (losses), net										(33,000,000)	91,000,000	(170,000,000)
Provision for income taxes										138,000,000	262,000,000	130,000,000
Net Income (Loss) Attributable to Parent		132,000,000	$ 213,000,000	$ 158,000,000	(88,000,000)	235,000,000	$ 263,000,000	$ 202,000,000	170,000,000	415,000,000	870,000,000	716,000,000
Other Comprehensive Income (Loss), Net of Tax										2,222,000,000	2,501,000,000	(1,424,000,000)
Total comprehensive income (loss)										2,637,000,000	3,371,000,000	(708,000,000)
Debt Disclosure [Abstract]
Debt Issuance Cost													(24,000,000)	(22,000,000)
Long-term Debt, Gross													3,597,000,000	3,003,000,000
Debt Instrument, Face Amount																	$ 850,000,000
Cash flows from operating activities
Net Income (Loss) Attributable to Parent		132,000,000	$ 213,000,000	$ 158,000,000	(88,000,000)	235,000,000	$ 263,000,000	$ 202,000,000	170,000,000	415,000,000	870,000,000	716,000,000
Other, net										(98,000,000)	(57,000,000)	(2,000,000)
Net cash provided by operating activities										3,322,000,000	2,307,000,000	1,581,000,000
Cash flows from investing activities
Sales of fixed maturity securities available-for-sale										6,514,000,000	13,214,000,000	9,340,000,000
Payments to Acquire Businesses, Net of Cash Acquired										0	4,000,000	(32,000,000)
Payments for (Proceeds from) Short-term Investments										(155,000,000)	199,000,000	129,000,000
Payments for (Proceeds from) Other Investing Activities										(335,000,000)	(304,000,000)	(365,000,000)
Net cash used in investing activities										(2,680,000,000)	(2,638,000,000)	(637,000,000)
Cash flows from financing activities
Dividends to stockholders										(182,000,000)	(163,000,000)	(140,000,000)
Purchases of treasury stock										(163,000,000)	(101,000,000)	(300,000,000)
Exercise of stock options, net										1,000,000	6,000,000	3,000,000
Maturities of Senior Debt										3,000,000	403,000,000	3,000,000
Proceeds from affiliated long-term debt issuance										(598,000,000)	(599,000,000)	0
Payments Of Debt Issuance Costs										(5,000,000)	(5,000,000)	0
Net cash used in financing activities										1,254,000,000	(121,000,000)	(322,000,000)
Cash and cash equivalents, beginning of period					1,449,000,000				1,890,000,000	1,449,000,000	1,890,000,000	1,304,000,000
Cash and cash equivalents, end of period		3,408,000,000				1,449,000,000				3,408,000,000	1,449,000,000	1,890,000,000
Supplementary information:
Income taxes paid, net of refunds										108,000,000	44,000,000	142,000,000
Cash Acquired from Acquisition											27,000,000	5,000,000
Long-term debt													3,573,000,000	2,981,000,000
Proceeds from Issuance of Common Stock										481,000,000	0	0
Parent Company [Member]
Assets
Fixed maturity securities available-for-sale													642,000,000	525,000,000
Short-term investments													172,000,000	19,000,000
Cash and cash equivalents		494,000,000			10,000,000	10,000,000			21,000,000	10,000,000	21,000,000	15,000,000	494,000,000	10,000,000	$ 21,000,000	$ 15,000,000
Investments In Subsidiary													16,937,000,000	14,486,000,000
Loans and Leases Receivable, Related Parties													1,010,000,000	1,010,000,000
Other assets													326,000,000	270,000,000
Total assets													19,581,000,000	16,320,000,000
Liabilities and Stockholders’ Equity
Long-term debt - affiliated	[1]												500,000,000	500,000,000
Other liabilities													1,160,000,000	1,244,000,000
Total stockholders equity													14,352,000,000	11,602,000,000
Total liabilities and stockholders’ equity													19,581,000,000	16,320,000,000
CONSOLIDATED STATEMENTS OF INCOME
Interest and Dividend Income, Operating	[2]									472,000,000	308,000,000	576,000,000
Total investment related gains (losses), net										14,000,000	4,000,000	(5,000,000)
Operating Expenses										(59,000,000)	(55,000,000)	(36,000,000)
Interest and Debt Expense										(202,000,000)	(206,000,000)	(181,000,000)
Income (loss) before income tax and undistributed earnings of subsidiaries										225,000,000	51,000,000	354,000,000
Provision for income taxes										(21,000,000)	(33,000,000)	(37,000,000)
Net income (loss) before undistributed earnings of subsidiaries										246,000,000	84,000,000	391,000,000
Equity In Undistributed Earnings Of Subsidiaries										169,000,000	786,000,000	325,000,000
Net Income (Loss) Attributable to Parent										415,000,000	870,000,000	716,000,000
Other Comprehensive Income (Loss), Net of Tax										(29,000,000)	(33,000,000)	21,000,000
Total comprehensive income (loss)										386,000,000	837,000,000	737,000,000
Debt Disclosure [Abstract]
Debt Issuance Cost													(25,000,000)	(22,000,000)
Proceeds from Dividends Received										340,000,000	175,000,000
Long-term Debt, Gross													3,594,000,000	2,996,000,000
Long-term Debt													500,000,000	500,000,000
Cash flows from operating activities
Net Income (Loss) Attributable to Parent										415,000,000	870,000,000	716,000,000
Equity Net Earnings Subsidiaries										(169,000,000)	(786,000,000)	(325,000,000)
Other, net										(170,000,000)	72,000,000	37,000,000
Net cash provided by operating activities										76,000,000	156,000,000	428,000,000
Cash flows from investing activities
Sales of fixed maturity securities available-for-sale										358,000,000	576,000,000	482,000,000
Purchases of fixed maturity securities available-for-sale										(400,000,000)	(494,000,000)	(383,000,000)
Payments for (Proceeds from) Short-term Investments										(165,000,000)	0	0
Payments for (Proceeds from) Other Investing Activities										(26,000,000)	0	0
Capital Contributions To Subsidiaries										(78,000,000)	(96,000,000)	(82,000,000)
Net cash used in investing activities										(311,000,000)	(14,000,000)	17,000,000
Cash flows from financing activities
Dividends to stockholders										(182,000,000)	(163,000,000)	(140,000,000)
Purchases of treasury stock										(163,000,000)	(101,000,000)	(300,000,000)
Exercise of stock options, net										1,000,000	6,000,000	3,000,000
Net Change In Cash Collateral For Loaned Securities										(11,000,000)	(92,000,000)	(2,000,000)
Maturities of Senior Debt										0	(397,000,000)	0
Proceeds from affiliated long-term debt issuance										(598,000,000)	(599,000,000)	0
Payments Of Debt Issuance Costs										(5,000,000)	(5,000,000)	0
Net cash used in financing activities										719,000,000	(153,000,000)	(439,000,000)
Change in cash and cash equivalents										484,000,000	(11,000,000)	6,000,000
Cash and cash equivalents, beginning of period					$ 10,000,000				$ 21,000,000	10,000,000	21,000,000	15,000,000
Cash and cash equivalents, end of period		$ 494,000,000				$ 10,000,000				494,000,000	10,000,000	21,000,000
Supplementary information:
Interest paid										187,000,000	192,000,000	176,000,000
Income taxes paid, net of refunds										23,000,000	9,000,000	93,000,000
Long-term debt	[3]												3,569,000,000	2,974,000,000
Proceeds from Issuance of Common Stock										$ 481,000,000	$ 0	$ 0
Senior Notes Due 2019 [Member]
Debt Disclosure [Abstract]
Debt Instrument, Face Amount													$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage													6.45%
Senior Notes Due 2021 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 400,000,000	400,000,000
Debt Instrument, Face Amount													$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage													5.00%
Senior Notes Due 2021 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 400,000,000	400,000,000
Senior Notes Due 2023 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													399,000,000	399,000,000
Debt Instrument, Face Amount													$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage													4.70%
Senior Notes Due 2023 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 399,000,000	399,000,000
Senior Notes Due 2026 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													400,000,000	400,000,000
Debt Instrument, Face Amount													$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage													3.95%
Senior Notes Due 2026 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 400,000,000	400,000,000
Senior Notes Due 2029 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													599,000,000	599,000,000
Debt Instrument, Face Amount													$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage													3.90%
Senior Notes Due 2029 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 599,000,000	599,000,000
Subordinated Debentures Due 2042 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													400,000,000	400,000,000
Debt Instrument, Face Amount													$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage													6.20%
Subordinated Debentures Due 2042 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 400,000,000	400,000,000
Subordinated Debentures Due 2056 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													400,000,000	400,000,000
Debt Instrument, Face Amount													$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage													5.75%
Subordinated Debentures Due 2056 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 400,000,000	400,000,000
Junior Subordinated Debentures Due 2065 [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													319,000,000	319,000,000
Debt Instrument, Face Amount													$ 400,000,000
Debt Instrument, Interest Rate, Stated Percentage													4.82%
Junior Subordinated Debentures Due 2065 [Member] | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 398,000,000	398,000,000
Senior Notes Due 2030
Debt Disclosure [Abstract]
Long-term Debt, Gross													597,000,000	0
Debt Instrument, Face Amount													$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage													3.15%
Senior Notes Due 2030 | Parent Company [Member]
Debt Disclosure [Abstract]
Long-term Debt, Gross													$ 598,000,000	$ 0
[1]	Long-term debt – affiliated in 2020 and 2019 consists of $500 million of subordinated debt issued to various operating subsidiaries.
[2]	Interest/dividend income includes $340 million and $175 million of cash dividends received from consolidated subsidiaries in 2020 and 2019, respectively.
[3]	Long-term debt – unaffiliated consists of the following: 2020 2019 $400 million 5.00% Senior Notes due 2021 $ 400 $ 400 $400 million 4.70% Senior Notes due 2023 399 399 $400 million 3.95% Senior Notes due 2026 400 400 $600 million 3.90% Senior Notes due 2029 599 599 $600 million 3.15% Senior Notes due 2030 598 — $400 million 6.20% Subordinated Debentures due 2042 400 400 $400 million 5.75% Subordinated Debentures due 2056 400 400 $400 million Variable Rate Junior Subordinated Debentures due 2065 398 398 Subtotal 3,594 2,996 Unamortized debt issuance costs (25) (22) Total $ 3,569 $ 2,974

Supplementary Insurance Infor_3

Supplementary Insurance Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		$ 3,616	$ 3,512
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		54,729	51,383
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		6,413	5,711
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		11,694	11,297	$ 10,544
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		2,575	2,520	2,139
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		11,779	10,894	9,744
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		383	330	423
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	1,881	1,944	1,862
US Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		1,816	1,806
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		12,245	11,969
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		2,578	2,143
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		5,838	5,729	5,534
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		714	769	730
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		5,979	5,339	5,131
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		200	199	180
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	679	697	698
US Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		255	313
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		23,104	23,728
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		18	18
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		53	39	27
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		999	931	706
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		764	737	442
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		52	31	109
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	109	113	106
Canada Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		195	200
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		3,474	3,260
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		292	219
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		1,052	1,066	1,024
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		207	205	199
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		909	857	848
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		16	12	13
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	201	249	251
Canada Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		16	23
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		4	42
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		83	89	43
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		1	3	2
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		68	80	37
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	3	4	2
EMEA Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		264	250
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		1,379	1,197
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		1,389	1,109
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		1,555	1,442	1,424
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		72	73	66
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		1,389	1,205	1,233
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		31	36	27
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	186	199	179
EMEA Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		5,881	5,703
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		66	51
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		252	218	195
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		193	195	134
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		163	175	116
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	50	52	37
Asia Pacific Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		1,045	927
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		3,568	2,837
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		2,059	2,121
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		2,681	2,568	2,296
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		107	104	96
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		2,293	2,317	1,885
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		65	36	92
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	274	223	262
Asia Pacific Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		41	16
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		4,187	2,215
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		2	2
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		180	146	1
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		85	46	40
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		206	162	40
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		19	16	2
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	25	27	19
Corporate And Other Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		875	451
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		5	6
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		197	194	166
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		8	22	12
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost		0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[1]	$ 354	$ 380	$ 308
[1]	Includes policy acquisition costs and other insurance expenses, excluding amortization of DAC. Also includes other operating expenses, interest expense, and collateral finance and securitization expense.

Supplemental Schedule of Rein_3

Supplemental Schedule of Reinsurance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums, Life Insurance in Force	$ 1,990	$ 1,316	$ 1,363
Ceded Premiums, Life Insurance in Force	184,625	192,864	186,172
Assumed Premiums, Life Insurance in Force	3,480,692	3,480,206	3,329,181
Premiums, Net, Life Insurance in Force	$ 3,298,057	$ 3,288,658	$ 3,144,372
Life Insurance in Force Premiums, Percentage Assumed to Net	105.50%	105.80%	105.90%
Direct Premiums Earned	$ 58	$ 76	$ 63
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	947	929	860
Assumed Premiums Earned	12,583	12,150	11,341
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 11,694	$ 11,297	$ 10,544
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	107.60%	107.50%	107.60%
US Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 23	$ 29	$ 32
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	585	591	593
Assumed Premiums Earned	6,399	6,291	6,095
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 5,837	$ 5,729	$ 5,534
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	109.60%	109.80%	110.20%
US Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 3	$ 2	$ 5
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	0	0	0
Assumed Premiums Earned	50	37	22
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 53	$ 39	$ 27
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	94.30%	95.40%	82.70%
Canada Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 0	$ 0	$ 0
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	54	54	47
Assumed Premiums Earned	1,106	1,120	1,071
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 1,052	$ 1,066	$ 1,024
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	105.10%	105.00%	104.60%
Canada Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 0	$ 0	$ 0
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	0	0	0
Assumed Premiums Earned	83	89	43
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 83	$ 89	$ 43
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	100.00%	100.00%	100.00%
EMEA Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 32	$ 45	$ 26
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	24	52	26
Assumed Premiums Earned	1,548	1,449	1,424
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 1,556	$ 1,442	$ 1,424
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	99.50%	100.60%	100.00%
EMEA Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 0	$ 0	$ 0
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	178	148	144
Assumed Premiums Earned	430	366	339
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 252	$ 218	$ 195
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	170.60%	167.90%	173.50%
Asia Pacific Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 0	$ 0	$ 0
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	106	84	50
Assumed Premiums Earned	2,787	2,652	2,346
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 2,681	$ 2,568	$ 2,296
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	104.00%	103.20%	102.20%
Asia Pacific Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Premiums Earned	$ 0	$ 0	$ 0
Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies	0	0	0
Assumed Premiums Earned	180	146	1
Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount	$ 180	$ 146	$ 1
Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net	100.00%	100.00%	100.00%

Valuation and Qualifying Acco_3

Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Adoption of New Accounting Standard Current Expected Credit Losses	$ 14		$ 0		$ 0
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	236		181		227
Valuation Allowances and Reserves, Charged to Cost and Expense	(4)		(56)		(34)
Valuation Allowances and Reserves, Charged to Other Accounts	(19)		(1)		(12)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	0		0		0
Valuation Allowances and Reserves, Balance, Ending Balance	251		236		181
SEC Schedule, 12-09, Allowance, Loan and Lease Loss, Real Estate [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	12	[1]	11		9
Valuation Allowances and Reserves, Charged to Cost and Expense	(38)	[1]	(1)		(2)
Valuation Allowances and Reserves, Charged to Other Accounts	(14)	[1]	0		0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	0	[1]	0		0
Valuation Allowances and Reserves, Balance, Ending Balance	64	[1]	12	[1]	$ 11
SEC Schedule, 12-09, Allowance, Loss on Finance Receivable
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	0
Valuation Allowances and Reserves, Charged to Cost and Expense	(41)
Valuation Allowances and Reserves, Charged to Other Accounts	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	21
Valuation Allowances and Reserves, Balance, Ending Balance	$ 20		$ 0
[1]	Upon adoption of Financial Instruments – Credits Losses on January 1, 2020, the Company increased the valuation allowance for mortgage loans by $14 million. The increase was reflected as a decrease to opening retained earnings, net of income taxes.