NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Schedule of Committed and Available Credit Facilities) (Details) $ in Millions	Dec. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Committed Credit	$ 9,428
Credit Available	7,428
Revolving Credit Facility | Five Year Competitive Advance and Revolving Credit Facility
Line of Credit Facility [Line Items]
Committed Credit	5,000
Credit Available	5,000
Revolving Credit Facility | European Securitization Facility, Due October 2020
Line of Credit Facility [Line Items]
Committed Credit	448
Credit Available	448
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due March 2020, Facility Three
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due March 2020, Facility Four
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Term Loan Facility, Due December 2021
Line of Credit Facility [Line Items]
Committed Credit	280
Credit Available	280
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due August 2020
Line of Credit Facility [Line Items]
Committed Credit	200
Credit Available	200
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due July 2020 [Member]
Line of Credit Facility [Line Items]
Committed Credit	200
Credit Available	200
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due August 2020 [Member]
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due December 2020 [Member]
Line of Credit Facility [Line Items]
Committed Credit	300
Credit Available	300
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due December 2021 [Member]
Line of Credit Facility [Line Items]
Committed Credit	300
Credit Available	300
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due October 2024, Facility One [Member]
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due October 2024 [Member]
Line of Credit Facility [Line Items]
Committed Credit	100
Credit Available	100
Revolving Credit Facility | Bilateral Revolving Credit Facility, Due November 2024 [Member]
Line of Credit Facility [Line Items]
Committed Credit	200
Credit Available	200
Term Loan Facility 1
Line of Credit Facility [Line Items]
Committed Credit	2,000
Credit Available	$ 0