Deferred Acquisition Costs and Deferred Sales Inducement Costs - Deferred Acquisition Costs (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Balances of and changes in DAC
Beginning balance	$ 2,713
Ending balance	2,701	$ 2,713
Variable Annuities
Balances of and changes in DAC
Beginning balance	1,496	1,598
Capitalization of acquisition costs	6	23
Amortization	(30)	(125)
Ending balance	1,472	1,496
Structured Variable Annuities
Balances of and changes in DAC
Beginning balance	208	149
Capitalization of acquisition costs	25	83
Amortization	(7)	(24)
Ending balance	226	208
Fixed Annuities
Balances of and changes in DAC
Beginning balance	35	45
Capitalization of acquisition costs	0	0
Amortization	(2)	(10)
Ending balance	33	35
Fixed Indexed Annuities
Balances of and changes in DAC
Beginning balance	5	6
Capitalization of acquisition costs	0	0
Amortization	0	(1)
Ending balance	5	5
Universal Life Insurance
Balances of and changes in DAC
Beginning balance	110	118
Capitalization of acquisition costs	0	0
Amortization	(2)	(8)
Ending balance	108	110
Variable Universal Life Insurance
Balances of and changes in DAC
Beginning balance	534	521
Capitalization of acquisition costs	13	57
Amortization	(11)	(44)
Ending balance	536	534
Indexed Universal Life Insurance
Balances of and changes in DAC
Beginning balance	223	236
Capitalization of acquisition costs	1	4
Amortization	(4)	(17)
Ending balance	220	223
Other Life Insurance
Balances of and changes in DAC
Beginning balance	2	3
Capitalization of acquisition costs	0	0
Amortization	0	(1)
Ending balance	2	2
Life Contingent Payout Annuities
Balances of and changes in DAC
Beginning balance	6	2
Capitalization of acquisition costs	1	4
Amortization	0	0
Ending balance	7	6
Term and Whole Life Insurance
Balances of and changes in DAC
Beginning balance	17	18
Capitalization of acquisition costs	0	1
Amortization	0	(2)
Ending balance	17	17
Disability Income Insurance
Balances of and changes in DAC
Beginning balance	75	79
Capitalization of acquisition costs	1	4
Amortization	(3)	(8)
Ending balance	73	75
Total, All Products
Balances of and changes in DAC
Beginning balance	2,711	2,775
Capitalization of acquisition costs	47	176
Amortization	(59)	(240)
Ending balance	2,699	2,711
Other broker dealer acquisition costs
Balances of and changes in DAC
Beginning balance	2
Ending balance	$ 2	$ 2