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	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	$ 2.7	$ 59.2
Liabilities	55.0	30.6
Foreign exchange forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	2.7	4.8
Liabilities	32.6	21.6
Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.4	0.4
Cross Currency Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	12.9
Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	9.1	8.6
Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		54.4
Fair Value, Inputs, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	0.0	0.0
Liabilities	0.0	0.0
Fair Value, Inputs, 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
Fair Value, Inputs, Level 1 | Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Fair Value, Inputs, Level 1 | Cross Currency Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0
Fair Value, Inputs, Level 1 | Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Fair Value, Inputs, Level 1 | Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		0.0
Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	2.7	59.2
Liabilities	45.9	22.0
Fair Value, Inputs, Level 2 | Foreign exchange forward contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	2.7	4.8
Liabilities	32.6	21.6
Fair Value, Inputs, Level 2 | Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.4	0.4
Fair Value, Inputs, Level 2 | Cross Currency Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	12.9
Fair Value, Inputs, Level 2 | Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Fair Value, Inputs, Level 2 | Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		54.4
Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets	0.0	0.0
Liabilities	9.1	8.6
Fair Value, Inputs, 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
Fair Value, Inputs, Level 3 | Interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0	0.0
Fair Value, Inputs, Level 3 | Cross Currency Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	0.0
Fair Value, Inputs, Level 3 | Contingent considerations on acquisitions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities	$ 9.1	8.6
Fair Value, Inputs, Level 3 | Available-for-sale security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets		$ 0.0