DERIVATIVE INSTRUMENTS (Fair Value of Derivative Instruments By Balance Sheet Location) (Details) £ in Millions, SFr in Millions	Dec. 31, 2020 USD ($)	Dec. 31, 2020 GBP (£)	Dec. 21, 2020 USD ($)	Dec. 21, 2020 CHF (SFr)	Oct. 02, 2020 USD ($)	Dec. 31, 2019 USD ($)
Cross-currency swap
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount			$ 471,600,000	SFr 420.1
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total Derivatives designated as hedges — Assets	$ 12,920,000					$ 16,461,000
Total Derivative designated as hedges — Liabilities	136,165,000					53,470,000
Designated as Hedging Instrument | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	1,875,000,000					1,325,000,000
Designated as Hedging Instrument | Interest rate swap
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	1,900,000,000					1,300,000,000
Designated as Hedging Instrument | Interest rate swap | Cash Flow Hedges | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Total Derivatives designated as hedges — Assets	0					12,000
Designated as Hedging Instrument | Interest rate swap | Cash Flow Hedges | Other assets
Derivatives, Fair Value [Line Items]
Total Derivatives designated as hedges — Assets	0					0
Designated as Hedging Instrument | Interest rate swap | Cash Flow Hedges | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Total Derivative designated as hedges — Liabilities	22,033,000					6,635,000
Designated as Hedging Instrument | Interest rate swap | Cash Flow Hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Total Derivative designated as hedges — Liabilities	71,736,000					38,522,000
Designated as Hedging Instrument | Cross-currency swap | Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount					$ 33,300,000	66,700,000
Designated as Hedging Instrument | Cross-currency swap | Cash Flow Hedges | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Total Derivatives designated as hedges — Assets	7,623,000					5,032,000
Designated as Hedging Instrument | Cross-currency swap | Cash Flow Hedges | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Total Derivative designated as hedges — Liabilities	4,335,000					101,000
Designated as Hedging Instrument | Cross-currency swap | Cash Flow Hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Total Derivative designated as hedges — Liabilities	26,728,000					5,440,000
Designated as Hedging Instrument | Cross-currency swap | Net Investment Hedges
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount	167,500,000	£ 128.3				30,000,000.0
Designated as Hedging Instrument | Cross-currency swap | Net Investment Hedges | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Total Derivatives designated as hedges — Assets	5,297,000					7,952,000
Designated as Hedging Instrument | Cross-currency swap | Net Investment Hedges | Other assets
Derivatives, Fair Value [Line Items]
Total Derivatives designated as hedges — Assets	0					3,465,000
Designated as Hedging Instrument | Cross-currency swap | Net Investment Hedges | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Total Derivative designated as hedges — Liabilities	1,884,000					0
Designated as Hedging Instrument | Cross-currency swap | Net Investment Hedges | Other liabilities
Derivatives, Fair Value [Line Items]
Total Derivative designated as hedges — Liabilities	$ 9,449,000					$ 2,772,000