Derivative Financial Instruments - Carrying Amounts of Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	$ 43,816	$ 37,415
Assets	2,073	1,588
Liabilities	6,210	6,630
Derivatives designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	1,600	871
Assets	0	11
Liabilities	42	4
Derivatives designated as hedging instruments \| Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	1,600	850
Assets	0	11
Liabilities	42	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	42,216	36,544
Assets	2,073	1,577
Liabilities	6,168	6,626
Derivatives not designated as hedging instruments \| Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	8,424	6,229
Assets	7	75
Liabilities	237	2
Derivatives not designated as hedging instruments \| Foreign currency swaps
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	1,083	503
Assets	9	0
Liabilities	19	6
Derivatives not designated as hedging instruments \| Equity options
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	32,496	29,651
Assets	1,110	1,062
Liabilities	0	0
Derivatives not designated as hedging instruments \| Futures contracts
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	132	68
Assets	0	0
Liabilities	1	1
Derivatives not designated as hedging instruments \| Foreign currency forwards
Derivative Instruments and Hedging Activities Disclosures
Gross Notional	81	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	947	399
Liabilities	6,456	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	$ (545)	$ 75