FAIR VALUE MEASUREMENT - FINANCIAL ASSETS AND LIABILITIES THAT ARE RECORDED AT FAIR VALUE AND CLASSIFIED BASED ON THE LOWEST LEVEL OF INPUT (Details) - USD ($) $ in Millions	10 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	$ 14.7	$ 59.2
Liabilities	10.6	30.6
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	7.1	7.6
Unrealized gain: Reported in Other expense (income), net	0.7	0.1
Effect of exchange rate changes	(0.2)	0.9
Ending balance	7.6	8.6
Foreign exchange forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	14.7	4.8
Liabilities	2.5	21.6
Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		54.4
Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.5	0.4
Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	7.6	8.6
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	0.0	0.0
Liabilities	0.0	0.0
Level 1 | Foreign exchange forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	0.0	0.0
Liabilities	0.0	0.0
Level 1 | Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		0.0
Level 1 | Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Level 1 | Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	14.7	59.2
Liabilities	3.0	22.0
Level 2 | Foreign exchange forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	14.7	4.8
Liabilities	2.5	21.6
Level 2 | Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		54.4
Level 2 | Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.5	0.4
Level 2 | Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	0.0	0.0
Liabilities	7.6	8.6
Level 3 | Foreign exchange forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	0.0	0.0
Liabilities	0.0	0.0
Level 3 | Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		0.0
Level 3 | Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Level 3 | Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	$ 7.6	$ 8.6