FINANCING (Outstanding Financing Facilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing
Senior notes, principal amount	$ 4,150,000	$ 4,150,000
Less: Unamortized discount and debt issuance costs	25,832	26,783
Total debt	4,124,168	4,123,217
Less: Current portion of long-term debt	299,880	0	[1]
Total long-term debt, less current portion	3,824,288	4,123,217	[1]
Senior notes [Member]
Financing
Senior notes, principal amount	4,200,000
Senior notes [Member] | 4.625% Senior Notes due 2021 [Member]
Financing
Senior notes, principal amount	$ 300,000	$ 300,000
Interest rate of senior notes	4.625%	4.625%
Senior notes, effective interest rate	4.638%
Senior notes [Member] | 3.800% Senior Notes due 2022 [Member]
Financing
Senior notes, principal amount	$ 300,000	$ 300,000
Interest rate of senior notes	3.80%	3.80%
Senior notes, effective interest rate	3.845%
Senior notes [Member] | 3.850% Senior Notes due 2023 [Member]
Financing
Senior notes, principal amount	$ 300,000	$ 300,000
Interest rate of senior notes	3.85%	3.85%
Senior notes, effective interest rate	3.851%
Senior notes [Member] | 3.550% Senior Notes due 2026 [Member]
Financing
Senior notes, principal amount	$ 500,000	$ 500,000
Interest rate of senior notes	3.55%	3.55%
Senior notes, effective interest rate	3.57%
Senior notes [Member] | 3.600% Senior Notes due 2027 [Member]
Financing
Senior notes, principal amount	$ 750,000	$ 750,000
Interest rate of senior notes	3.60%	3.60%
Senior notes, effective interest rate	3.619%
Senior notes [Member] | 4.350% Senior Notes due 2028 [Member]
Financing
Senior notes, principal amount	$ 500,000	$ 500,000
Interest rate of senior notes	4.35%	4.35%
Senior notes, effective interest rate	4.383%
Senior notes [Member] | 3.900% Senior Notes due 2029 [Member]
Financing
Senior notes, principal amount	$ 500,000	$ 500,000
Interest rate of senior notes	3.90%	3.90%
Senior notes, effective interest rate	3.901%
Senior notes [Member] | 4.200% Senior Notes due 2030 [Member]
Financing
Senior notes, principal amount	$ 500,000	$ 500,000
Interest rate of senior notes	4.20%	4.20%
Senior notes, effective interest rate	4.205%
Senior notes [Member] | 1.750% Senior Notes due 2031 [Member]
Financing
Senior notes, principal amount	$ 500,000	$ 500,000
Interest rate of senior notes	1.75%	1.75%
Senior notes, effective interest rate	1.798%

[1] The balance sheet at December 31, 2020, has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by United States generally accepted accounting principles for complete financial statements.