SIGNIFICANT ACCOUNTING POLICIES - ADDITIONAL INFORMATION (Details)			1 Months Ended	3 Months Ended
	May 05, 2020 EUR (€)	Apr. 09, 2020 USD ($)	May 11, 2020 USD ($)	Mar. 31, 2020 USD ($)	Apr. 17, 2020 USD ($)	Dec. 31, 2019 USD ($)
Significant Accounting Policies [Line Items]
Cash and cash equivalents				$ 235,900,000		$ 404,900,000
Debt instrument, covenant, operating income excluding depreciation and amortization to interest expense, minimum				3.0
Deferred revenue				$ 26,600,000
Line of Credit | 2018 Revolving Credit Facility | Subsequent event
Significant Accounting Policies [Line Items]
Proceeds from long-term lines of credit			$ 700,000,000.0
Notes Payable to Banks | Subsequent event
Significant Accounting Policies [Line Items]
Debt instrument, maximum borrowing capacity	€ 40,000,000.0	$ 310,000,000.0			$ 310,000,000.0
Term of loan	364 days	364 days
Trade Accounts Receivable
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts and trade discounts				$ 31,400,000		$ 29,400,000