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Fair Value Option - Borrowings Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair Value Measurements
Borrowings at fair value	$ 127,285	$ 103,332
Recurring
Fair Value Measurements
Borrowings at fair value	127,285	103,332
Recurring | Equity
Fair Value Measurements
Borrowings at fair value	61,119	49,144
Recurring | Interest rates
Fair Value Measurements
Borrowings at fair value	45,095	34,451
Recurring | Commodities
Fair Value Measurements
Borrowings at fair value	13,873	14,829
Recurring | Credit
Fair Value Measurements
Borrowings at fair value	5,341	3,306
Recurring | Foreign exchange
Fair Value Measurements
Borrowings at fair value	$ 1,857	$ 1,602

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