Commitment, Contingencies, And Guarantees (Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest expense reclassified from OCI	$ 165	$ 134	$ 325	$ 266
Other comprehensive income (loss), before income tax	(955)	$ (4,446)	467	$ (8,554)
Fair Value Hedging
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain recognized in OCI	57		40
Net realized gains reclassified from OCI	11		31
Interest expense reclassified from OCI	(4)		(8)
Other comprehensive income (loss), before income tax	$ 50		$ 17