GUARANTOR FINANCIAL INFORMATION - Condensed Consolidating Statement of Financial Position (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash, cash equivalents and restricted cash	$ 47,286	$ 36,394
Receivables - net	27,427	27,047
Investment in subsidiaries	0	0
All other assets	187,308	202,607
Total assets	262,021	266,048
Liabilities and equity
Short-term borrowings	18,122	22,072
Long-term and non-recourse borrowings	67,032	68,809
All other liabilities	140,008	145,306
Total liabilities	225,162	236,187
Total liabilities and equity	262,021	266,048
Reportable Legal Entities | Parent Company Guarantor
Assets
Cash, cash equivalents and restricted cash	27,463	10,591
Receivables - net	41,752	47,170
Investment in subsidiaries	198,819	147,397
All other assets	27,445	28,377
Total assets	295,479	233,535
Liabilities and equity
Short-term borrowings	150,985	135,172
Long-term and non-recourse borrowings	37,967	40,660
All other liabilities	64,455	66,808
Total liabilities	253,408	242,640
Total liabilities and equity	295,479	233,535
Reportable Legal Entities | Subsidiary Issuer
Assets
Cash, cash equivalents and restricted cash	0	0
Receivables - net	17,970	17,726
Investment in subsidiaries	0	0
All other assets	1,431	236
Total assets	19,401	17,961
Liabilities and equity
Short-term borrowings	6,024	5,991
Long-term and non-recourse borrowings	12,028	10,780
All other liabilities	337	161
Total liabilities	18,390	16,932
Total liabilities and equity	19,401	17,961
Reportable Legal Entities | Subsidiary Guarantor
Assets
Cash, cash equivalents and restricted cash	0	0
Receivables - net	84	230
Investment in subsidiaries	40,645	40,408
All other assets	0	0
Total assets	40,729	40,638
Liabilities and equity
Short-term borrowings	3,598	2,981
Long-term and non-recourse borrowings	23,954	24,417
All other liabilities	68	70
Total liabilities	27,620	27,468
Total liabilities and equity	40,729	40,638
Reportable Legal Entities | Non- Guarantor Subsidiaries
Assets
Cash, cash equivalents and restricted cash	20,390	26,438
Receivables - net	56,003	61,026
Investment in subsidiaries	441,860	421,613
All other assets	304,108	291,995
Total assets	822,360	801,071
Liabilities and equity
Short-term borrowings	6,511	9,712
Long-term and non-recourse borrowings	31,336	34,262
All other liabilities	138,217	146,972
Total liabilities	176,064	190,946
Total liabilities and equity	822,360	801,071
Consolidating Adjustments
Assets
Cash, cash equivalents and restricted cash	(567)	(636)
Receivables - net	(88,382)	(99,104)
Investment in subsidiaries	(681,324)	(609,418)
All other assets	(145,676)	(118,000)
Total assets	(915,949)	(827,158)
Liabilities and equity
Short-term borrowings	(148,996)	(131,783)
Long-term and non-recourse borrowings	(38,255)	(41,310)
All other liabilities	(63,069)	(68,705)
Total liabilities	(250,320)	(241,799)
Total liabilities and equity	$ (915,949)	$ (827,158)