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Derivative Instruments and Hedging Activities - Protection Purchased with CDS (Details) - Protection Purchased - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Credit Derivatives
Notional	$ 552,000	$ 377,000
CDS
Credit Derivatives
Fair Value Asset (Liability)	(8,826)	(4,309)
Single name
Credit Derivatives
Notional	170,000	156,000
Fair Value Asset (Liability)	(3,499)	(2,693)
Index and basket
Credit Derivatives
Notional	351,000	193,000
Fair Value Asset (Liability)	(4,294)	(654)
Tranched index and basket
Credit Derivatives
Notional	31,000	28,000
Fair Value Asset (Liability)	$ (1,033)	$ (962)

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