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SUBSEQUENT EVENTS - Senior Secured Notes Offering (Details)					12 Months Ended
	Feb. 10, 2021 USD ($)	Feb. 26, 2020 USD ($)	Feb. 26, 2020 EUR (€)	Nov. 12, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Feb. 26, 2020 EUR (€)	Feb. 13, 2017 USD ($)	Feb. 13, 2017 EUR (€)
Proceeds from issuance of long-term debt					$ 1,639,661,000	$ 400,000,000	$ 0
Debt, aggregated amount					3,271,969,000	2,258,873,000
Current portion of long-term debt					26,116,000
4⅛% Senior Notes
Debt instrument, face amount		$ 200,000,000.0
2¼% Senior Notes
Debt instrument, face amount | €								€ 500,000,000.0
Proceeds from issuance of long-term debt | €			€ 494,000,000.0
Bank Debt
Debt, aggregated amount					$ 930,407,000	795,830,000
Senior Notes | 4¾% Senior Notes
Debt instrument, face amount									$ 300,000,000.0
Stated interest rate					4.75%
Debt instrument offering price percentage at principal amount									100.00%	100.00%
Debt, aggregated amount					$ 300,000,000	300,000,000
Senior Notes | 3¼% Senior Notes
Debt instrument, face amount | €										€ 650,000,000.0
Stated interest rate					3.25%
Debt instrument offering price percentage at principal amount									100.00%	100.00%
Debt, aggregated amount					$ 795,307,000	729,755,000
Senior Notes | 4⅛% Senior Notes
Debt instrument, face amount		200,000,000.0		$ 400,000,000.0
Stated interest rate					4.125%
Debt instrument offering price percentage at principal amount				100.00%
Proceeds from issuance of long-term debt		$ 196,500,000		$ 394,700,000
Debt, aggregated amount					$ 600,000,000	400,000,000
Senior Notes | 2¼% Senior Notes
Debt instrument, face amount | €								€ 500,000,000.0
Stated interest rate					2.25%
Debt instrument offering price percentage at principal amount		100.00%						100.00%
Debt, aggregated amount					$ 611,775,000	0
Term Loan | Bank Debt
Debt, aggregated amount						$ 764,700,000
Subsequent Event | Senior Notes | 1.4% Senior Notes
Debt instrument, face amount	$ 500,000,000.0
Stated interest rate	1.40%
Debt instrument offering price percentage at principal amount	99.945%
Proceeds from issuance of long-term debt	$ 500,000,000.0
Subsequent Event | Term Loan | Bank Debt
Repayments of debt	500,000,000.0
Debt, aggregated amount	500,000,000.0
Current portion of long-term debt	$ 90,000,000.0
Debt Instrument, Redemption - One Month Prior to the Par Call Date | Subsequent Event | Senior Notes | 1.4% Senior Notes
Debt Instrument, redemption price, percentage	100.00%
Debt Instrument, Redemption Period - On or After the Par Call Date | Subsequent Event | Senior Notes | 1.4% Senior Notes
Debt Instrument, redemption price, percentage	100.00%
Debt Instrument, Redemption Period - Upon the Occurrence of Repurchase Event | Subsequent Event | Senior Notes | 1.4% Senior Notes
Debt Instrument, redemption price, percentage	101.00%

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