Derivatives and Hedging Activities - Summary of the gains (losses) related to cash flow hedges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	$ 22.1	$ (19.6)	$ (18.4)	$ (53.0)
Amount of Gain Reclassified from AOCI into Income	3.0	0.6	8.3	(1.0)
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	21.9	(20.0)	(17.9)	(53.6)
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	2.8	0.2	7.5	(1.8)
Commodity contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	0.0	0.0	0.0	0.0
Commodity contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	0.0	0.0	0.0	0.0
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	0.2	0.4	(0.5)	0.6
Foreign exchange contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	0.0	0.0	0.0	0.0
Foreign exchange contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	0.1	0.3	0.6	0.6
Foreign exchange contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	0.0	0.0	0.0	0.0
Forward interest rate swaps | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	0.0	0.0	0.0	0.0
Forward interest rate swaps | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	0.0	0.0	0.0	0.0
Forward interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	$ 0.1	$ 0.1	$ 0.2	$ 0.2