Derivative Instruments - Cumulative Fair Value Hedging Adjustments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Commodity contracts
Assets
Carrying amount of the hedged items	$ 24,900	$ 25,700
Long-term debt
Liabilities
Carrying amount of the hedged items	191,109	195,642
Cumulative amount of fair value hedging adjustments included in the carrying amount of hedged items:
Active hedging relationships	(11,782)	(1,999)
Discontinued hedging relationships	8,706	8,834
Total	(3,076)	6,835
Long-term debt | Not designated as hedges
Liabilities
Carrying amount of the hedged items	1,400	10,800
Beneficial interests issued by consolidated VIEs
Liabilities
Carrying amount of the hedged items	749	749
Cumulative amount of fair value hedging adjustments included in the carrying amount of hedged items:
Active hedging relationships	0	0
Discontinued hedging relationships	(1)	(1)
Total	(1)	(1)
Investment securities - AFS
Assets
Carrying amount of the hedged items	62,197	65,746
Cumulative amount of fair value hedging adjustments included in the carrying amount of hedged items:
Active hedging relationships	(2,239)	417
Discontinued hedging relationships	636	661
Total	(1,603)	1,078
Investment securities - AFS | Not designated as hedges
Assets
Carrying amount of the hedged items	$ 14,600	$ 14,000