Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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Derivative Instruments and Hedging Activities Fair Value Balance Sheet (Details) € in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Apr. 18, 2018 USD ($)	Apr. 18, 2018 EUR (€)	Dec. 31, 2017 USD ($)
Cross currency swaps
Derivatives designated as hedging instruments:
Derivative, notional amount			$ 500.0	€ 404
Designated as Hedging Instrument [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument		$ 33.2			$ 0.6
Derivative liability, fair value, designated as hedging instrument		(1.5)			(11.5)
Designated as Hedging Instrument [Member] \| Cross currency swaps \| Other current assets [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument		27.6
Designated as Hedging Instrument [Member] \| Cross currency swaps \| Accounts payable and other current liabilities [Member]
Derivatives designated as hedging instruments:
Derivative liability, fair value, designated as hedging instrument		0.0
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Other current assets [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument		2.4			0.4
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Other non-current assets [Member]
Derivatives designated as hedging instruments:
Derivative asset, fair value, designated as hedging instrument		3.2			0.2
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Accounts payable and other current liabilities [Member]
Derivatives designated as hedging instruments:
Derivative liability, fair value, designated as hedging instrument		(0.8)			(6.1)
Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member] \| Other liabilities [Member]
Derivatives designated as hedging instruments:
Derivative liability, fair value, designated as hedging instrument		(0.7)			(5.4)
Not Designated as Hedging Instrument [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value		95.4			134.5
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value		(12.7)			(11.7)
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member]
Derivatives designated as hedging instruments:
Derivative, notional amount		796.0			765.0
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Other current assets [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value		59.0			70.8
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Other non-current assets [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value		36.2			63.5
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Accounts payable and other current liabilities [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value		(7.0)			(7.3)
Not Designated as Hedging Instrument [Member] \| Commodity swaps [Member] \| Other liabilities [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value		(5.5)			(4.2)
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member]
Derivatives designated as hedging instruments:
Derivative, notional amount		30.6			30.6
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member] \| Other current assets [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value		0.2
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member] \| Other non-current assets [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value		0.0			0.2
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member] \| Accounts payable and other current liabilities [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value		(0.2)
Not Designated as Hedging Instrument [Member] \| Commodity Option [Member] \| Other liabilities [Member]
Derivatives not designated as hedging instruments:
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value		0.0			(0.2)
Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member] \| Cross currency swaps
Derivatives designated as hedging instruments:
Derivative, notional amount		500.0
Cash Flow Hedging [Member] \| Designated as Hedging Instrument [Member] \| Foreign currency forwards [Member]
Derivatives designated as hedging instruments:
Derivative, notional amount		$ 339.6			$ 326.4
Fair Value Hedging [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	$ 0.4