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, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	$ 9.1	$ (22.1)	$ 22.9	$ 18.4
Amount of Gain Reclassified from AOCI into Income	2.5	3.0	5.4	8.3
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	9.2	(21.9)	23.0	17.9
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Reclassified from AOCI into Income	2.4	2.8	5.2	7.5
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	(0.1)	(0.2)	(0.1)	0.5
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	0.0	0.1	0.0	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