CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Statement of Cash Flows [Abstract]
Net income	$ 1,497	$ 887
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion, net	96	91
Deferred income tax expense (benefit)	521	(64)
Share-based compensation	72	64
Net realized investment (gains) losses	(10)	(10)
Net trading (gains) losses	(6)	(6)
Loss from equity method investments	39	29
Impairments and provision for loan losses	20	5
Net (gains) losses of consolidated investment entities	13	5
Changes in operating assets and liabilities:
Restricted and segregated investments	0	124
Deferred acquisition costs	156	(76)
Policyholder account balances, future policy benefits and claims, net	2,721	259
Derivatives, net of collateral	(267)	280
Receivables	(131)	120
Brokerage deposits	192	(524)
Accounts payable and accrued expenses	(205)	(91)
Current Income Tax Expense (Benefit)	(382)	(7)
Change in Other Operating Assets and Liabilities of Consolidated Investment Entities	(6)	(6)
Other, net	383	72
Net cash provided by (used in) operating activities	4,703	1,152
Available-for-Sale securities:
Proceeds from sales	1,318	110
Maturities, sinking fund payments and calls	4,162	4,012
Purchases	(6,138)	(5,294)
Proceeds from sales, maturities and repayments of mortgage loans	92	131
Funding of mortgage loans	(132)	(127)
Proceeds from sales, maturities and collections of other investments	109	149
Purchase of other investments	(134)	(159)
Purchase of investments by consolidated investment entities	(376)	(392)
Proceeds from sales, maturities and repayments of investments by consolidated investment entities	343	319
Purchase of land, buildings, equipment and software	(62)	(67)
Payments for Derivative Instrument, Investing Activities	(258)	(42)
Proceeds from Derivative Instrument, Investing Activities	108	44
Cash paid for deposit receivable	(1)	(347)
Cash received for deposit receivable	53	41
Other, net	20	(7)
Net cash provided by (used in) investing activities	(896)	(1,629)
Investment certificates:
Proceeds from additions	2,534	2,924
Maturities, withdrawals and cash surrenders	(2,599)	(2,873)
Policyholder account balances:
Deposits and other additions	774	1,151
Net transfers from (to) separate accounts	(15)	(28)
Surrenders and other benefits	(726)	(926)
Change in banking deposits, net	1,510	2,205
Cash paid for purchased options with deferred premiums	(131)	(95)
Cash received from purchased options with deferred premiums	39	60
Proceeds from Debt, Net of Issuance Costs	496	497
Repayments of long-term debt	(756)	(307)
Dividends paid to shareholders	(250)	(253)
Repurchase of common shares	(716)	(827)
Exercise of stock options	2	1
Repayments of debt by consolidated investment entities	(37)	(33)
Proceeds from (Payments for) Other Financing Activities	(8)	0
Net cash provided by (used in) financing activities	117	1,496
Effect of exchange rate changes on cash	(18)	2
Cash and Cash Equivalents including Disposal Group, Period Increase (Decrease)	3,906	1,021
Less: Cash and Cash Equivalents of Disposal Group, Period Increase (Decrease)	0	166
Net increase (decrease) in cash and cash equivalents, including amounts restricted	3,906	855
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	$ 10,119	$ 6,738