Derivatives and Hedging Activities - Summary of effect of derivative instruments on income (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net sales	$ 387.6	$ 353.3
Cost of sales	362.4	349.8
Interest expense	10.2	6.7
Amount of gain reclassified from AOCI to income	(1.7)	2.9
Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain	0.0	0.0
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain	(1.8)	2.8
Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain	0.1	0.1
Commodity contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	0.0	0.0
Commodity contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	(1.8)	2.8
Commodity contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	0.0	0.0
Interest Rate Swaps | Fair value hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, gain on derivative	2.3	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
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
Hedged Item	0.0	0.0
Derivatives designated as hedging instruments	0.0	0.0
Interest Rate Swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain reclassified from AOCI to income	0.1	0.1
Hedged Item	0.0	(2.7)
Derivatives designated as hedging instruments	$ 0.0	$ 2.7