Derivatives and Hedging Activities - Derivatives Not Designated as Hedges Impact (Details) - Not designated as hedging instruments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Investment Income
Impact of derivatives not designated as hedging instruments
Total gain (loss)	$ (3)	$ 11	$ (26)
Net Investment Income | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	1	(23)
Net Investment Income | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(3)	8	(4)
Net Investment Income | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Net Investment Income | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	2	1
Net Investment Income | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Net Investment Income | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Net Investment Income | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Net Investment Income | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0		0
Banking and Deposit Interest Expense
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1)	(1)	0
Banking and Deposit Interest Expense | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Banking and Deposit Interest Expense | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	4	(1)	1
Banking and Deposit Interest Expense | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Banking and Deposit Interest Expense | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Banking and Deposit Interest Expense | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Banking and Deposit Interest Expense | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Banking and Deposit Interest Expense | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Banking and Deposit Interest Expense | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(5)		(1)
Distribution Expenses
Impact of derivatives not designated as hedging instruments
Total gain (loss)	130	(184)	116
Distribution Expenses | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	(3)	(1)
Distribution Expenses | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	128	(177)	116
Distribution Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	2	(4)	1
Distribution Expenses | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Distribution Expenses | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Distribution Expenses | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Distribution Expenses | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Distribution Expenses | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0		0
Interest Credited to Fixed Accounts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	1	95	113
Interest Credited to Fixed Accounts | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest Credited to Fixed Accounts | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	79	(126)	91
Interest Credited to Fixed Accounts | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest Credited to Fixed Accounts | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest Credited to Fixed Accounts | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(75)	217	30
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)	(3)	4	(8)
Interest Credited to Fixed Accounts | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest Credited to Fixed Accounts | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0		0
Benefits, Claims, Losses and Settlement Expenses
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(401)	443	(359)
Benefits, Claims, Losses and Settlement Expenses | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(5)	(26)	0
Benefits, Claims, Losses and Settlement Expenses | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	770	(164)	34
Benefits, Claims, Losses and Settlement Expenses | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Benefits, Claims, Losses and Settlement Expenses | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Benefits, Claims, Losses and Settlement Expenses | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Benefits, Claims, Losses and Settlement Expenses | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Benefits, Claims, Losses and Settlement Expenses | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1,166)	633	(393)
Benefits, Claims, Losses and Settlement Expenses | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0		0
Change in Fair Value of Market Risk Benefits
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1,649)	(1,591)	(1,689)
Change in Fair Value of Market Risk Benefits | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(422)	(2,874)	(886)
Change in Fair Value of Market Risk Benefits | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1,239)	899	(851)
Change in Fair Value of Market Risk Benefits | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	7	279	43
Change in Fair Value of Market Risk Benefits | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	5	105	5
Change in Fair Value of Market Risk Benefits | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Change in Fair Value of Market Risk Benefits | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Change in Fair Value of Market Risk Benefits | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Change in Fair Value of Market Risk Benefits | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0		0
Interest And Debt Expense
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1)	(1)	0
Interest And Debt Expense | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	(1)	(1)	0
Interest And Debt Expense | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest And Debt Expense | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest And Debt Expense | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest And Debt Expense | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest And Debt Expense | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest And Debt Expense | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
Interest And Debt Expense | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0		0
General and administrative expense
Impact of derivatives not designated as hedging instruments
Total gain (loss)	17	(30)	25
General and administrative expense | Interest rate contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
General and administrative expense | Equity contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	10	(23)	17
General and administrative expense | Credit contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
General and administrative expense | Foreign exchange contracts
Impact of derivatives not designated as hedging instruments
Total gain (loss)	7	(7)	8
General and administrative expense | IUL embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
General and administrative expense | Fixed deferred indexed annuity and deposit receivables embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	0	0
General and administrative expense | Structured variable annuity embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	0	$ 0	0
General and administrative expense | SMC embedded derivatives
Impact of derivatives not designated as hedging instruments
Total gain (loss)	$ 0		$ 0