Derivatives and Hedging Activities - Summary of the (losses) gains related to cash flow hedges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in AOCI on Derivatives	$ (19.6)	$ 20.4	$ (53.0)	$ 29.6
Amount of Gain (Loss) Reclassified from AOCI into Income	0.6	(0.2)	(1.0)	(3.1)
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in AOCI on Derivatives	(20.0)	20.7	(53.6)	30.3
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.2	(0.2)	(1.8)	(2.8)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in AOCI on Derivatives	0.4	(0.3)	0.6	(0.7)
Foreign exchange contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	0.3	(0.1)	0.6	(0.5)
Forward interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income	$ 0.1	$ 0.1	$ 0.2	$ 0.2