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FINANCIAL INSTRUMENTS AND DERIVATIVES - NET INVESTMENT HEDGES (Details) $ in Millions	Sep. 30, 2019 USD ($)
Not Designated as Hedging Instrument
Derivative [Line Items]
Aggregate Notional Amount	$ 210.8
Aggregate Notional Amount Maturing within 12 Months	210.8
Net Investment Hedging | Not Designated as Hedging Instrument
Derivative [Line Items]
Aggregate Notional Amount	1,040.1
Aggregate Notional Amount Maturing within 12 Months	251.0
Net Investment Hedging | Not Designated as Hedging Instrument | Foreign exchange forward contracts
Derivative [Line Items]
Aggregate Notional Amount	753.0
Aggregate Notional Amount Maturing within 12 Months	251.0
Net Investment Hedging | Not Designated as Hedging Instrument | Cross currency basis swaps
Derivative [Line Items]
Aggregate Notional Amount	287.1
Aggregate Notional Amount Maturing within 12 Months	0.0
Fair Value Hedging
Derivative [Line Items]
Aggregate Notional Amount	104.7
Aggregate Notional Amount Maturing within 12 Months	36.6
Fair Value Hedging | Foreign exchange forward contracts
Derivative [Line Items]
Aggregate Notional Amount	104.7
Aggregate Notional Amount Maturing within 12 Months	$ 36.6

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

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