Fair Value Option - Borrowings Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value Measurements
Borrowings at fair value	$ 76,340	$ 73,701
Recurring
Fair Value Measurements
Borrowings at fair value	76,340	73,701
Recurring | Equity
Fair Value Measurements
Borrowings at fair value	37,046	33,952
Recurring | Interest rates
Fair Value Measurements
Borrowings at fair value	28,638	31,222
Recurring | Commodities
Fair Value Measurements
Borrowings at fair value	7,837	5,078
Recurring | Credit
Fair Value Measurements
Borrowings at fair value	1,347	1,344
Recurring | Foreign exchange
Fair Value Measurements
Borrowings at fair value	$ 1,472	$ 2,105