Fair Value Option - Borrowings Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value Measurements
Borrowings at fair value	$ 107,547	$ 93,900
Recurring
Fair Value Measurements
Borrowings at fair value	107,547	93,900
Recurring | Equity
Fair Value Measurements
Borrowings at fair value	53,530	46,073
Recurring | Interest rates
Fair Value Measurements
Borrowings at fair value	35,239	31,055
Recurring | Commodities
Fair Value Measurements
Borrowings at fair value	14,071	12,798
Recurring | Credit
Fair Value Measurements
Borrowings at fair value	3,047	2,400
Recurring | Foreign exchange
Fair Value Measurements
Borrowings at fair value	$ 1,660	$ 1,574