NOTES PAYABLE, FINANCE LEASES, AND COMMERCIAL BANK FINANCING - Notes Payable and Finance Leases to Affiliates, and Debt of VIEs and Guarantees of Third-Party Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Current portion of notes payable, finance leases, and commercial bank financing	$ 72	$ 71
Notes payable, finance leases, and commercial bank financing, less current portion	12,391	12,367
Consolidated total debt	12,463
Affiliated Entity
Debt Instrument [Line Items]
Current portion of notes payable, finance leases, and commercial bank financing	2	2
Notes payable, finance leases, and commercial bank financing, less current portion	7	9
Guarantee Obligations
Debt Instrument [Line Items]
Unconditional and irrevocably guaranteed debt	51	57
Consolidated VIEs
Debt Instrument [Line Items]
Notes payable, finance leases, and commercial bank financing, less current portion	11	15
Consolidated total debt	$ 17	$ 20

Amount of short-term and long-term debt and lease obligation.

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