Derivatives, Sold Credit Derivatives (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Details of Sold and Purchased Credit Derivatives [Abstract]
Credit protection sold - Notional amount	$ 22,386	$ 18,776
Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Credit protection sold - Notional amount	5,425	4,974
Credit default swaps [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Credit protection sold - Notional amount	15,980	12,568
Credit default swaps [Member] \| Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Credit protection sold - Notional amount	1,261	922
Risk participation swaps [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Credit protection sold - Notional amount	6,406	6,208
Risk participation swaps [Member] \| Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Credit protection sold - Notional amount	$ 4,164	$ 4,052