Derivatives and Hedging Activities - Summary of effect of derivative instruments on income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net sales	$ 396.0	$ 348.8	$ 783.6	$ 702.1
Cost of sales	382.9	342.8	745.3	692.6
Interest expense, net	10.1	7.9	20.3	14.6
Amount of gain reclassified from AOCI to income	(0.9)	2.5	(2.7)	5.4
Fair value hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative				2.3
Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain	0.0	0.0	0.0	0.0
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain	(1.0)	2.4	(2.9)	5.2
Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain	0.1	0.1	0.2	0.2
Commodity contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	0.0	0.0	0.0	0.0
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	(1.0)	2.4	(2.9)	5.2
Commodity contracts | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	0.0	0.0	0.0	0.0
Interest Rate Swaps | Fair value hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative				2.3
Interest Rate Swaps | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	0.0	0.0	0.0	0.0
Hedged Item			0.0	0.0
Derivatives designated as hedging instruments			0.0	0.0
Interest Rate Swaps | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	0.0	0.0	0.0	0.0
Hedged Item			0.0	0.0
Derivatives designated as hedging instruments			0.0	0.0
Interest Rate Swaps | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	$ 0.1	$ 0.1	0.2	0.2
Hedged Item			0.0	(2.7)
Derivatives designated as hedging instruments			$ 0.0	$ 2.7