DERIVATIVES - Cumulative Basis Adjustment (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivatives
Hedged Liability, Statement of Financial Position [Extensible Enumeration]	Long-term debt (including $129,817 and $112,719 as of September 30, 2025 and December 31, 2024, respectively, at fair value)	Long-term debt (including $129,817 and $112,719 as of September 30, 2025 and December 31, 2024, respectively, at fair value)
Long-term debt, carrying amount of hedged asset/liability	$ 160,896	$ 147,910
Long-term debt, cumulative fair value hedging adjustment included in the carrying amount, active	366	(1,051)
Long-term debt, cumulative fair value hedging adjustment included in the carrying amount, de-designated	(3,224)	(4,499)
Physical commodities inventories	11,200	11,400
Physical commodities inventories, cumulative basis adjustments	1,200	800
Amount of designated hedged items	25,900	12,900
Debt Securities Specifically Hedged
Derivatives
Debt securities AFS, carrying amount of hedged asset/liability	43,359	55,786
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, active	101	(348)
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, de-designated	106	(100)
Debt Securities Portfolio Layer Method
Derivatives
Debt securities AFS, carrying amount of hedged asset/liability	34,357	28,554
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, active	293	(193)
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, de-designated	89	(67)
Consumer loans
Derivatives
Debt securities AFS, carrying amount of hedged asset/liability	51,781	53,700
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, active	592	(224)
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, de-designated	0	0
Amount of designated hedged items	26,000	17,000
Corporate loans
Derivatives
Debt securities AFS, carrying amount of hedged asset/liability	3,976	4,269
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, active	53	(72)
Debt securities AFS, cumulative fair value hedging adjustment included in the carrying amount, de-designated	(28)	(12)
Amount of designated hedged items	$ 2,700	$ 3,000