Fair Value Option - Borrowings Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Fair Value Measurements
Borrowings at fair value	$ 97,055	$ 93,900
Recurring
Fair Value Measurements
Borrowings at fair value	97,055	93,900
Recurring | Equity
Fair Value Measurements
Borrowings at fair value	48,186	46,073
Recurring | Interest rates
Fair Value Measurements
Borrowings at fair value	31,490	31,055
Recurring | Commodities
Fair Value Measurements
Borrowings at fair value	13,463	12,798
Recurring | Credit
Fair Value Measurements
Borrowings at fair value	2,388	2,400
Recurring | Foreign exchange
Fair Value Measurements
Borrowings at fair value	$ 1,528	$ 1,574