Derivatives and Hedging Activities - Summary of the Gains (Losses) Related to Cash Flow Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	$ 30.7	$ (17.6)	$ 44.5
Amount of (Loss) Gain Reclassified from AOCI into Income	7.0	12.7	6.5
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	30.7	(16.9)	45.4
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	6.6	11.5	5.1
Commodity contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	0.0	0.0
Commodity contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	0.0	0.0
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives	0.0	(0.7)	(0.9)
Foreign exchange contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	0.0	0.0
Foreign exchange contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	0.0	0.8	1.0
Foreign exchange contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	0.0	0.0
Forward interest rate swaps | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	0.0	0.0
Forward interest rate swaps | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	0.0	0.0
Forward interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Reclassified from AOCI into Income	$ 0.4	$ 0.4	$ 0.4