Derivatives and Hedging Activities - Derivatives Not Designated as Hedges Impact (Details) - Not designated as hedging instruments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Investment Income
Impact of derivatives not designated as hedging instruments
Total gain (loss)	$ (26)	$ (1)	$ (34)
Net Investment Income | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(23)	(1)	(34)
Net Investment Income | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(4)	(1)
Net Investment Income | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	1	1
Banking and Deposit Interest Expense
Impact of derivatives not designated as hedging instruments
Total gain (loss)			2
Banking and Deposit Interest Expense | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	1	1	11
Banking and Deposit Interest Expense | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1)	(1)	(9)
Distribution Expenses
Impact of derivatives not designated as hedging instruments
Total gain (loss)	116	103	99
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)	116	100	99
Distribution Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	1	1
Interest Credited to Fixed Accounts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	113	58	(31)
Interest Credited to Fixed Accounts | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	91	55	117
Interest Credited to Fixed Accounts | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	30	7	(140)
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)	(8)
Interest Credited to Fixed Accounts | Fixed deferred indexed annuities embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)		(4)	(8)
Benefits, Claims, Losses and Settlement Expenses
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1,218)	(869)	(988)
Benefits, Claims, Losses and Settlement Expenses | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(886)	1,633	1,097
Benefits, Claims, Losses and Settlement Expenses | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(817)	(744)	(1,547)
Benefits, Claims, Losses and Settlement Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	43	(106)	(73)
Benefits, Claims, Losses and Settlement Expenses | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	5	(8)	(30)
Benefits, Claims, Losses and Settlement Expenses | GMWB and GMAB embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	830	(1,553)	(435)
Benefits, Claims, Losses and Settlement Expenses | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(393)	(91)
General and Administrative Expense
Impact of derivatives not designated as hedging instruments
Total gain (loss)	25	25	15
General and Administrative Expense | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	17	15	16
General and Administrative Expense | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	$ 8	$ 10	$ (1)