Accounting for Derivative Instruments and Hedging Activities - Pre-tax Effects of Economic Hedges Not Designated as Cash Flow Hedges (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Unrealized mark-to-market results
Reversal of previously recognized unrealized losses/(gains) on settled positions related to economic hedges	$ 244	$ (846)
Reversal of acquired (gain) positions related to economic hedges	(12)	(25)
Net unrealized gains/(losses) on open positions related to economic hedges	240	(1,073)
Total unrealized mark-to-market gains/(losses) for economic hedging activities	472	(1,944)
Reversal of previously recognized unrealized (gains)/losses on settled positions related to trading activity	(4)	1
Net unrealized gains on open positions related to trading activity	0	11
Total unrealized mark-to-market (losses)/gains for trading activity	(4)	12
Total unrealized gains/(losses) - commodities and foreign exchange	468	(1,932)
Net unrealized gains(losses) on open positions related to economic hedges	240	(1,073)
Credit Risk Related Contingent Features
Collateral due on net liability position that has not been called by a certain marginable agreement counterparty	23
Additional collateral required	8
Adequate Assurance Clauses
Credit Risk Related Contingent Features
Derivative net liability position, collateral required for contracts with credit rating contingent feature	417
Commodities | Operating revenues
Unrealized mark-to-market results
Total unrealized gains/(losses) - commodities and foreign exchange	(64)	103
Commodities | Cost of operations
Unrealized mark-to-market results
Total unrealized gains/(losses) - commodities and foreign exchange	523	(2,037)
Foreign exchange | Cost of operations
Unrealized mark-to-market results
Total unrealized gains/(losses) - commodities and foreign exchange	9	2
Commodities and foreign exchange
Unrealized mark-to-market results
Total unrealized gains/(losses) - commodities and foreign exchange	468	(1,932)
Consumer financing program
Unrealized mark-to-market results
Total unrealized gains/(losses) - commodities and foreign exchange	4	0
Interest rate contracts
Unrealized mark-to-market results
Total unrealized gains/(losses) - commodities and foreign exchange	$ 12	$ (5)