LONG-TERM DEBT, NET - Summary (Details) - USD ($)	Dec. 31, 2020	Jun. 11, 2020	Dec. 31, 2019
Long-term Debt
Total long-term debt	$ 3,892,500,000		$ 3,292,500,000
Less: Unamortized original issue discount	312,891,000		357,887,000
Less: Unamortized debt issuance costs	44,903,000		44,987,000
Total long-term debt, net	3,534,706,000		2,889,626,000
Credit Facility | Credit Facility due February 13, 2025
Long-term Debt
Total long-term debt	0		0
Term Loan | Term Loan due February 13, 2027
Long-term Debt
Total long-term debt	425,000,000		425,000,000
Total long-term debt, net	425,000,000		425,000,000
Senior Notes | 6.375% Senior Notes (the “6.375% Senior Notes”)
Long-term Debt
Total long-term debt	$ 0		400,000,000
Less: Unamortized original issue discount		$ (12,800,000)
Less: Unamortized debt issuance costs		$ 2,900,000
Stated interest rate (as a percent)	6.375%
Senior Notes | 5.00% Senior Notes due December 15, 2027 (the “5.00% Senior Notes”); interest payable each June 15 and December 15
Long-term Debt
Total long-term debt	$ 450,000,000		450,000,000
Stated interest rate (as a percent)	5.00%
Senior Notes | 4.625% Senior Notes due June 1, 2028 (the “4.625% Senior Notes”); interest payable each June 1 and December 1
Long-term Debt
Total long-term debt	$ 500,000,000		0
Stated interest rate (as a percent)	4.625%
Senior Notes | 5.625% Senior Notes due February 15, 2029 (the “5.625% Senior Notes”); interest payable each February 15 and August 15
Long-term Debt
Total long-term debt	$ 350,000,000		350,000,000
Stated interest rate (as a percent)	5.625%
Senior Notes | 4.125% Senior Notes due August 1, 2030 (the “4.125% Senior Notes”); interest payable each February 1 and August 1
Long-term Debt
Total long-term debt	$ 500,000,000		0
Stated interest rate (as a percent)	4.125%
Senior Notes | 0.875% Exchangeable Senior Notes due October 1, 2022 (the “2022 Exchangeable Notes”); interest payable each April 1 and October 1
Long-term Debt
Total long-term debt	$ 517,500,000		517,500,000
Less: Unamortized original issue discount	26,525,000		40,768,000
Total long-term debt, net	$ 490,975,000		476,732,000
Stated interest rate (as a percent)	0.875%
Senior Notes | 0.875% Exchangeable Senior Notes due June 15, 2026 (the “2026 Exchangeable Notes”); interest payable each June 15 and December 15
Long-term Debt
Total long-term debt	$ 575,000,000		575,000,000
Less: Unamortized original issue discount	111,806,000		129,037,000
Total long-term debt, net	$ 463,194,000		445,963,000
Stated interest rate (as a percent)	0.875%
Senior Notes | 2.00% Exchangeable Senior Notes due January 15, 2030 (the “2030 Exchangeable Notes”); interest payable each January 15 and July 15
Long-term Debt
Total long-term debt	$ 575,000,000		575,000,000
Less: Unamortized original issue discount	168,531,000		181,800,000
Total long-term debt, net	$ 406,469,000		$ 393,200,000
Stated interest rate (as a percent)	2.00%