NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES Committed and Available Credit Facilities (Details) - Mar. 31, 2020 € in Millions, $ in Millions	EUR (€)	USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 8,765
Line of Credit Facility, Remaining Borrowing Capacity		7,515
Five Year Competitive Advance and Revolving Credit Facility [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		5,000
Line of Credit Facility, Remaining Borrowing Capacity		5,000
Term Loan Facility, Due September 2023 | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,250
Line of Credit Facility, Remaining Borrowing Capacity		0
European Securitization Facility, Due October 2020 [Member] | Secured Debt [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	€ 400	440
Line of Credit Facility, Remaining Borrowing Capacity		440
Bilateral Revolving Credit Facility, Due July 2020 [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		200
Line of Credit Facility, Remaining Borrowing Capacity		200
Bilateral Revolving Credit Facility, Due August 2020 [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		100
Line of Credit Facility, Remaining Borrowing Capacity		100
Bilateral Revolving Credit Facility, Due December 2020 | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		300
Line of Credit Facility, Remaining Borrowing Capacity		300
Bilateral Revolving Credit Facility, Due December 2021 | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		300
Line of Credit Facility, Remaining Borrowing Capacity		300
Bilateral Revolving Credit Facility, Due March 2022 | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		150
Line of Credit Facility, Remaining Borrowing Capacity		150
Bilateral Revolving Credit Facility, Due October 2024, Facility One | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		100
Line of Credit Facility, Remaining Borrowing Capacity		100
Bilateral Revolving Credit Facility, Due October 2024, Facility Two | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		100
Line of Credit Facility, Remaining Borrowing Capacity		100
Bilateral Revolving Credit Facility, Due November 2024 | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		200
Line of Credit Facility, Remaining Borrowing Capacity		200
Bilateral Revolving Credit Facility, Due March 2025, Facility One | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		100
Line of Credit Facility, Remaining Borrowing Capacity		100
Bilateral Revolving Credit Facility, Due March 2025, Facility Two | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		250
Line of Credit Facility, Remaining Borrowing Capacity		250
Bilateral Revolving Credit Facility, Due March 2025, Facility Three | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		275
Line of Credit Facility, Remaining Borrowing Capacity		$ 275