Fair Value Option - Borrowings Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair Value Measurements
Borrowings at fair value	$ 75,963	$ 76,340
Recurring
Fair Value Measurements
Borrowings at fair value	75,963	76,340
Recurring | Equity
Fair Value Measurements
Borrowings at fair value	37,987	37,046
Recurring | Interest rates
Fair Value Measurements
Borrowings at fair value	27,100	28,638
Recurring | Commodities
Fair Value Measurements
Borrowings at fair value	8,401	7,837
Recurring | Credit
Fair Value Measurements
Borrowings at fair value	1,310	1,347
Recurring | Foreign exchange
Fair Value Measurements
Borrowings at fair value	$ 1,165	$ 1,472