Reclassifications from Accumulated Other Comprehensive Loss - Schedule of Amounts Reclassified from AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other	$ (0.1)	$ (4.0)
Total before tax	101.1	52.3
Tax benefit (expense)	(16.3)	(8.4)
Net income	84.8	43.9
Amount Reclassified from AOCI | Cash flow hedging items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(1.8)	1.4
Tax benefit (expense)	0.4	(0.4)
Net income	(1.4)	1.0
Amount Reclassified from AOCI | Pension and other postretirement benefit plan items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(1.3)	(1.1)
Tax benefit (expense)	0.3	0.3
Net income	(1.0)	(0.8)
Amount Reclassified from AOCI | Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other	(0.5)	(1.6)
Amount Reclassified from AOCI | Prior service (cost) benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other	(0.8)	0.5
Commodity contracts | Amount Reclassified from AOCI | Cash flow hedging items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ (1.8)	$ 1.4