Statutory Information and Restrictions - Effects on Statutory Surplus Compared to NAIC Statutory Surplus (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Calculation of reserves using the Indiana universal life method
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	$ (3)	$ (1)
Conservative valuation rate on certain annuities
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	1	(1)
Calculation of reserves using continuous CARVM
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	1	(1)
Conservative Reg 213 reserves on variable annuity and individual life contracts
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	20	(31)
Derivative instruments and equity indexed reserves
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	(232)	(170)
Assets in group fixed annuity contracts held at general account balances
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	304	332
Lesser of LOC and XXX additional reserve as surplus
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	1,722	1,776
LLC notes and variable value surplus notes
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	1,320	1,444
Excess of loss reinsurance agreements
Statutory Accounting Practices [Line Items]
State insurance department, statutory to NAIC, amount of reconciling item	$ 541	$ 563