Derivative Financial Instruments - Schedule of Carrying Amounts of Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	$ 39,999	$ 37,639
Assets	1,566	1,596
Liabilities	6,267	6,631
Derivatives designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	1,600	871
Assets	0	11
Liabilities	0	4
Derivatives designated as hedging instruments \| Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	1,600	850
Assets	0	11
Liabilities	0	1
Derivatives designated as hedging instruments \| Foreign currency swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	0	21
Assets	0	0
Liabilities	0	3
Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	38,399	36,768
Assets	1,566	1,585
Liabilities	6,267	6,627
Derivatives not designated as hedging instruments \| Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	6,734	6,453
Assets	52	83
Liabilities	7	3
Derivatives not designated as hedging instruments \| Foreign currency swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	687	503
Assets	6	0
Liabilities	2	6
Derivatives not designated as hedging instruments \| Equity options
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	30,812	29,651
Assets	837	1,062
Liabilities	0	0
Derivatives not designated as hedging instruments \| Futures contracts
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	76	68
Assets	2	0
Liabilities	0	1
Derivatives not designated as hedging instruments \| Other derivative investments
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	90	93
Assets	0	0
Liabilities	0	0
Derivatives not designated as hedging instruments \| Other embedded derivatives
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	0	0
Assets	39	41
Liabilities	0	0
Derivatives not designated as hedging instruments \| Indexed annuities/IUL embedded derivatives
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	0	0
Assets	630	399
Liabilities	6,380	6,542
Derivatives not designated as hedging instruments \| Reinsurance related embedded derivatives
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	0	0
Assets	0	0
Liabilities	$ (122)	$ 75