DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt:
Debt, gross	$ 6,396,397	$ 6,636,615
Debt issuance costs and original issue discounts	(24,237)	(26,379)
Total debt	6,372,160	6,610,236
Short-term debt and current portion of long-term debt	(789,928)	(516,581)
Long-term debt	5,582,232	6,093,655
Interest Rate Swap \| Fair Value Hedging \| Designated as Hedging Instrument
Debt:
Aggregate notional amount of interest rate swaps	$ 150,000
U.S. commercial paper
Debt:
Weighted Average Interest Rate	0.22%
Debt, gross	$ 90,075	214,375
Canadian commercial paper
Debt:
Weighted Average Interest Rate	0.39%
Debt, gross	$ 57,301	62,800
Trade receivables program
Debt:
Weighted Average Interest Rate	0.00%
Debt, gross	$ 0	0
Global revolving credit facility
Debt:
Weighted Average Interest Rate	0.00%
Debt, gross	$ 0	200
Unsecured U.S. obligations
Debt:
Weighted Average Interest Rate	3.47%
Debt, gross	$ 200,000	200,000
Unsecured U.S. notes — Medium-term notes
Debt:
Weighted Average Interest Rate	3.41%
Debt, gross	$ 5,153,471	5,174,180
Unsecured foreign obligations
Debt:
Weighted Average Interest Rate	1.82%
Debt, gross	$ 193,690	254,259
Asset-backed U.S. obligations
Debt:
Weighted Average Interest Rate	2.55%
Debt, gross	$ 654,058	682,383
Finance lease obligations and other
Debt:
Debt, gross	$ 47,802	$ 48,418

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Nominal or face amount used to calculate payment on derivative.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, including portion classified as current.

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