Derivatives and Hedging Activities (Income Statement) (Details 2) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Investment Income
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	$ (18)	$ (2)	$ (17)	$ (2)
Net Investment Income | Interest rate contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(23)		(23)	(1)
Net Investment Income | Equity contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(1)	(1)		(1)
Net Investment Income | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	6	(1)	6
Banking and Deposit Interest Expense | Equity contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income		5	1	(2)
Banking and Deposit Interest Expense | Customer deposits - SMC embedded derivatives
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income		(5)	(1)	2
Distribution Expenses
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	48	87	80	(27)
Distribution Expenses | Interest rate contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income			(1)	2
Distribution Expenses | Equity contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	47	87	80	(29)
Distribution Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	1		1
Interest Credited to Fixed Accounts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	47	(71)	58	(7)
Interest Credited to Fixed Accounts | Equity contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	30	63	55	(49)
Interest Credited to Fixed Accounts | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	20	(127)	11	37
Interest Credited to Fixed Accounts | Fixed deferred indexed annuity embedded derivatives
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(3)	(7)	(8)	5
Benefits, Claims, Losses and Settlement Expenses
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(225)	(1,314)	(755)	692
Benefits, Claims, Losses and Settlement Expenses | Interest rate contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	871	60	(954)	2,575
Benefits, Claims, Losses and Settlement Expenses | Equity contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(304)	(1,467)	(614)	526
Benefits, Claims, Losses and Settlement Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(30)	(43)	39	(79)
Benefits, Claims, Losses and Settlement Expenses | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(5)	5	6	49
Benefits, Claims, Losses and Settlement Expenses | GMWB and GMAB embedded derivatives
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(657)	147	943	(2,366)
Benefits, Claims, Losses and Settlement Expenses | Structured annuity embedded derivatives
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(100)	(16)	(175)	(13)
General and Administrative Expense
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	8	14	10	(5)
General and Administrative Expense | Equity contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	6	13	12	(3)
General and Administrative Expense | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	$ 2	$ 1	$ (2)	$ (2)