Derivative Instruments and Hedging Activities - Protection Purchased with CDS (Details) - Protection Purchased - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Credit Derivatives
Notional	$ 456,000	$ 409,000
CDS
Credit Derivatives
Fair Value Asset (Liability)	(5,789)	(5,019)
Single name
Credit Derivatives
Notional	173,000	166,000
Fair Value Asset (Liability)	(3,222)	(2,799)
Index and basket
Credit Derivatives
Notional	252,000	213,000
Fair Value Asset (Liability)	(1,559)	(1,208)
Tranched index and basket
Credit Derivatives
Notional	31,000	30,000
Fair Value Asset (Liability)	$ (1,008)	$ (1,012)