Reclassifications from Accumulated Other Comprehensive Loss - Schedule of amounts reclassified from AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ 12.6	$ 10.2
(Loss) gain	(3.5)	4.1
Total before tax	(7.8)	(25.2)
Tax (expense)/benefit	0.9	10.4	$ 10.4
Net loss	(6.9)	(14.8)
Amount Reclassified from AOCI | Cash flow hedging items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	6.7	(1.7)
Tax (expense)/benefit	(1.6)	0.4
Net loss	5.1	(1.3)
Amount Reclassified from AOCI | Pension and other postretirement benefit plan items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(1.5)	(1.5)
Tax (expense)/benefit	0.5	0.4
Net loss	(1.0)	(1.1)
Amount Reclassified from AOCI | Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Loss) gain	(2.0)	(1.9)
Amount Reclassified from AOCI | Prior service benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Loss) gain	0.5	0.4
Commodity contracts | Amount Reclassified from AOCI | Cash flow hedging items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	6.7	(1.8)
Forward interest rate swaps | Amount Reclassified from AOCI | Cash flow hedging items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ 0.0	$ 0.1