Derivatives and Hedging Activities - Summary of the gains (losses) related to cash flow hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	$ 6.6		$ (46.4)
Amount of Gain (Loss) Recognized in AOCI on Derivatives		$ 6.2		$ 35.8
Amount of Gain (Loss) Reclassified from AOCI into Income	2.4		1.4
Amount of Gain (Loss) Reclassified from AOCI into Income		2.1		(1.0)
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	6.4		(47.2)
Amount of Gain (Loss) Recognized in AOCI on Derivatives		6.8		37.1
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	2.1		0.3
Amount of Gain (Loss) Reclassified from AOCI into Income		2.5		(0.3)
Commodity contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.0		0.0
Amount of Gain (Loss) Reclassified from AOCI into Income		0.0
Commodity contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.0		0.0
Amount of Gain (Loss) Reclassified from AOCI into Income		0.0
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	0.2		0.8
Amount of Gain (Loss) Recognized in AOCI on Derivatives		(0.6)		(1.3)
Foreign exchange contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.0		0.0
Amount of Gain (Loss) Reclassified from AOCI into Income		0.0
Foreign exchange contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.2		0.8
Amount of Gain (Loss) Reclassified from AOCI into Income		(0.5)		(1.0)
Foreign exchange contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.0		0.0
Amount of Gain (Loss) Reclassified from AOCI into Income		0.0
Forward interest rate swaps | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.0		0.0
Amount of Gain (Loss) Reclassified from AOCI into Income		0.0
Forward interest rate swaps | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.0		0.0
Amount of Gain (Loss) Reclassified from AOCI into Income		0.0
Forward interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	$ 0.1		$ 0.3
Amount of Gain (Loss) Reclassified from AOCI into Income		$ 0.1		$ 0.3