v3.26.3
Reclassifications from Accumulated Other Comprehensive Loss - Schedule of Changes in AOCI by Component, Net of Tax (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2026
Sep. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances at the beginning of the period $ 2,227.6 $ 1,887.0
Other comprehensive loss before reclassifications (5.0) (1.4)
Amounts reclassified from AOCI (0.2) 1.6
Total other comprehensive (loss) income, net of tax (5.2) 0.2
Balances at the end of the period 2,182.8 1,911.2
AOCI Attributable to Parent    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances at the beginning of the period (20.4) (67.9)
Balances at the end of the period (25.6) (67.7)
Cash flow hedging items    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances at the beginning of the period (3.8) (4.2)
Other comprehensive loss before reclassifications (3.6) (0.9)
Amounts reclassified from AOCI 0.5 1.2
Total other comprehensive (loss) income, net of tax (3.1) 0.3
Balances at the end of the period (6.9) (3.9)
Pension and other postretirement benefit plan items    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances at the beginning of the period 21.3 (27.4)
Other comprehensive loss before reclassifications 0.0 0.0
Amounts reclassified from AOCI (0.7) 0.4
Total other comprehensive (loss) income, net of tax (0.7) 0.4
Balances at the end of the period 20.6 (27.0)
Foreign currency items    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balances at the beginning of the period (37.9) (36.3)
Other comprehensive loss before reclassifications (1.4) (0.5)
Amounts reclassified from AOCI 0.0 0.0
Total other comprehensive (loss) income, net of tax (1.4) (0.5)
Balances at the end of the period $ (39.3) $ (36.8)