Derivatives and Hedging Activities - Derivatives Not Designated as Hedges Impact (Details) - Not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net Investment Income
Impact of derivatives not designated as hedging instruments
Total gain (loss)	$ (23)		$ (40)	$ (2)
Net Investment Income | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)			(23)	(1)
Net Investment Income | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)				(1)
Net Investment Income | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(23)		(17)
Banking and Deposit Interest Expense | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)		$ 2	1
Banking and Deposit Interest Expense | Customer deposits - SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)		(2)	(1)
Distribution Expenses
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(13)	41	67	14
Distribution Expenses | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)			(1)	2
Distribution Expenses | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(13)	41	67	12
Distribution Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)			1
Interest Credited to Fixed Accounts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	12	10	70	3
Interest Credited to Fixed Accounts | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)		42	55	(7)
Interest Credited to Fixed Accounts | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	11	(29)	22	8
Interest Credited to Fixed Accounts | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	1		(7)
Interest Credited to Fixed Accounts | Fixed deferred indexed annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)		(3)		2
Benefits, Claims, Losses and Settlement Expenses
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(249)	(691)	(1,004)	1
Benefits, Claims, Losses and Settlement Expenses | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(171)	(371)	(1,125)	2,204
Benefits, Claims, Losses and Settlement Expenses | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	1	(468)	(613)	58
Benefits, Claims, Losses and Settlement Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	2	(12)	41	(91)
Benefits, Claims, Losses and Settlement Expenses | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)		(23)	6	26
Benefits, Claims, Losses and Settlement Expenses | GMWB and GMAB embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(64)	186	879	(2,180)
Benefits, Claims, Losses and Settlement Expenses | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(17)	(3)	(192)	(16)
General and Administrative Expense
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1)	11	9	6
General and Administrative Expense | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	$ (1)	6	11	3
General and Administrative Expense | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)		$ 5	$ (2)	$ 3