DEBT (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total short-term debt	$ 17,540	$ 17,413
Unamortized (discount)/premium	(21)	(18)
Unamortized issuance costs	(238)	(235)
Fair value adjustments	(237)	(1,044)
Total long-term debt	122,625	120,455
Total debt	$ 140,165	$ 137,868
Average Contractual	4.60%	4.80%
Average Effective	4.60%	4.80%
Discontinued hedged debt	$ (336)	$ (450)
Debt carrying value of hedge	42,800	41,100
Fair value of short-term debt	16,200	16,200
Floating rate demand notes
Debt Instrument [Line Items]
Total short-term debt	12,745	12,040
Other short-term debt
Debt Instrument [Line Items]
Total short-term debt	3,463	4,173
Asset-backed debt
Debt Instrument [Line Items]
Total short-term debt	1,332	1,200
Asset-backed debt
Debt Instrument [Line Items]
Notes payable within one year	22,085	23,050
Notes payable after one year	33,302	36,224
Unsecured debt
Debt Instrument [Line Items]
Notes payable within one year	14,169	12,871
Notes payable after one year	$ 53,565	$ 49,607
Total short-term debt
Debt Instrument [Line Items]
Average Contractual	3.80%	4.70%
Average Effective	3.80%	4.70%
Total long-term debt
Debt Instrument [Line Items]
Average Contractual	4.70%	4.80%
Average Effective	4.70%	4.80%
Fair Value, Nonrecurring | Level 2
Debt Instrument [Line Items]
Fair value of debt	$ 142,583	$ 140,046