CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
Net income	$ 1,357	$ 1,430
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion, net	150	132
Deferred income tax expense (benefit)	198	(239)
Share-based compensation	107	100
Net realized investment (gains) losses	(14)	(15)
Net trading (gains) losses	(9)	(8)
Loss from equity method investments	58	54
Impairments and provision for loan losses	19	20
Net (gains) losses of consolidated investment entities	(7)	8
Changes in operating assets and liabilities:
Restricted and segregated investments	0	124
Deferred acquisition costs	187	(40)
Policyholder account balances, future policy benefits and claims, net	3,252	1,068
Derivatives, net of collateral	265	71
Receivables	(216)	205
Brokerage deposits	205	(492)
Accounts payable and accrued expenses	(94)	(43)
Current Income Tax Expense (Benefit)	(100)	57
Change in Other Operating Assets and Liabilities of Consolidated Investment Entities	20	(12)
Other, net	261	154
Net cash provided by (used in) operating activities	5,639	2,574
Available-for-Sale securities:
Proceeds from sales	1,690	219
Maturities, sinking fund payments and calls	6,568	6,107
Purchases	(10,197)	(7,508)
Proceeds from sales, maturities and repayments of mortgage loans	146	188
Funding of mortgage loans	(147)	(197)
Proceeds from sales, maturities and collections of other investments	139	215
Purchase of other investments	(219)	(227)
Purchase of investments by consolidated investment entities	(679)	(524)
Proceeds from sales, maturities and repayments of investments by consolidated investment entities	454	521
Purchase of land, buildings, equipment and software	(107)	(100)
Payments for Derivative Instrument, Investing Activities	(292)	(124)
Proceeds from Derivative Instrument, Investing Activities	129	71
Cash paid for deposit receivable	(3)	(348)
Cash received for deposit receivable	74	74
Other, net	23	(103)
Net cash provided by (used in) investing activities	(2,421)	(1,736)
Investment certificates:
Proceeds from additions	3,428	4,029
Maturities, withdrawals and cash surrenders	(3,780)	(4,184)
Policyholder account balances:
Deposits and other additions	1,202	1,620
Net transfers from (to) separate accounts	(63)	(46)
Surrenders and other benefits	(1,035)	(1,320)
Change in banking deposits, net	2,532	2,543
Cash paid for purchased options with deferred premiums	(177)	(158)
Cash received from purchased options with deferred premiums	40	220
Proceeds from Debt, Net of Issuance Costs	494	497
Repayments of long-term debt	(760)	(310)
Dividends paid to shareholders	(375)	(380)
Repurchase of common shares	(1,036)	(1,392)
Exercise of stock options	2	2
Borrowings of Consolidated Investment Entities	(382)	0
Repayments of debt by consolidated investment entities	(55)	(57)
Proceeds from (Payments for) Other Financing Activities	(6)	0
Net cash provided by (used in) financing activities	793	1,064
Effect of exchange rate changes on cash	(5)	(15)
Cash and Cash Equivalents including Disposal Group, Period Increase (Decrease)	4,006	1,887
Less: Cash and Cash Equivalents of Disposal Group, Period Increase (Decrease)	0	204
Net increase (decrease) in cash and cash equivalents, including amounts restricted	4,006	1,683
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period	6,213	5,883
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	$ 10,219	$ 7,566