Derivative Financial Instruments - Schedule of Carrying Amounts of Derivative Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	$ 42,322	$ 37,639
Assets	2,144	1,596
Liabilities	7,097	6,631
Derivatives designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	1,600	871
Assets	3	11
Liabilities	20	4
Derivatives designated as hedging instruments \| Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	1,600	850
Assets	3	11
Liabilities	20	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	40,722	36,768
Assets	2,141	1,585
Liabilities	7,077	6,627
Derivatives not designated as hedging instruments \| Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	8,152	6,453
Assets	28	83
Liabilities	19	3
Derivatives not designated as hedging instruments \| Foreign currency swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	765	503
Assets	8	0
Liabilities	4	6
Derivatives not designated as hedging instruments \| Equity options
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	31,613	29,651
Assets	1,274	1,062
Liabilities	0	0
Derivatives not designated as hedging instruments \| Futures contracts
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	104	68
Assets	0	0
Liabilities	0	1
Derivatives not designated as hedging instruments \| Foreign currency forwards
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	88	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	0	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	831	399
Liabilities	7,080	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	$ (26)	$ 75