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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Unrealized mark-to-market results
Reversal of previously recognized unrealized (gains)/losses on settled positions related to economic hedges	$ (414)	$ (522)	$ 39	$ (1,519)
Reversal of acquired (gain)/loss positions related to economic hedges	(8)	(6)	(3)	4
Net unrealized (losses)/gains on open positions related to economic hedges	(1,208)	475	(319)	(418)
Total unrealized mark-to-market (losses) for economic hedging activities	(1,630)	(53)	(283)	(1,933)
Reversal of previously recognized unrealized (gains)/losses on settled positions related to trading activity	(1)	0	(1)	11
Net unrealized (losses)/gains on open positions related to trading activity	(4)	(1)	1	13
Total unrealized mark-to-market (losses)/gains for trading activity	(5)	(1)	0	24
Total unrealized (losses) - commodities and foreign exchange	(1,635)	(54)	(283)	(1,909)
Net unrealized gains (losses) on open positions related to economic hedges	(1,208)	475	(319)	(418)
Credit Risk Related Contingent Features
Collateral due on net liability position that has not been called by a certain marginable agreement counterparty	31		31
Additional collateral required	27		27
Adequate Assurance Clauses
Credit Risk Related Contingent Features
Derivative net liability position, collateral required for contracts with credit rating contingent feature	444		444
Commodities | Operating revenues
Unrealized mark-to-market results
Total unrealized (losses) - commodities and foreign exchange	3	(71)	32	120
Commodities | Cost of operations
Unrealized mark-to-market results
Total unrealized (losses) - commodities and foreign exchange	(1,633)	8	(321)	(2,024)
Foreign exchange | Cost of operations
Unrealized mark-to-market results
Total unrealized (losses) - commodities and foreign exchange	(5)	9	6	(5)
Commodities and foreign exchange
Unrealized mark-to-market results
Total unrealized (losses) - commodities and foreign exchange	(1,635)	(54)	(283)	(1,909)
Consumer financing program
Unrealized mark-to-market results
Total unrealized (losses) - commodities and foreign exchange	(7)	(1)	(9)	(4)
Interest rate contracts
Unrealized mark-to-market results
Total unrealized (losses) - commodities and foreign exchange	$ (49)	$ 8	$ (31)	$ 32