v3.26.1
EQUITY AND CONVERTIBLE PREFERRED STOCK - Schedule of Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance $ 3,719.0 $ 4,011.7 $ 3,997.4
Total other comprehensive income (loss), net of tax 12.5 61.8 (132.7)
Ending balance 3,162.0 3,719.0 4,011.7
Total      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (733.4) (795.1) (662.4)
Other comprehensive income (loss) before reclassifications 15.6 67.9  
Net amounts reclassified from AOCI/(L) (2.5) (6.2)  
Total other comprehensive income (loss), net of tax 13.1 61.7  
Ending balance (720.3) (733.4) (795.1)
(Losses) Gains on Cash Flow Hedges      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (1.1) 2.1  
Other comprehensive income (loss) before reclassifications (0.9) (0.8)  
Net amounts reclassified from AOCI/(L) 1.7 (2.4)  
Total other comprehensive income (loss), net of tax 0.8 (3.2)  
Ending balance (0.3) (1.1) 2.1
(Losses) Gains on Net Investment Hedge      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (204.8) (23.0)  
Other comprehensive income (loss) before reclassifications 19.4 (181.8)  
Net amounts reclassified from AOCI/(L) 0.0 0.0  
Total other comprehensive income (loss), net of tax 19.4 (181.8)  
Ending balance (185.4) (204.8) (23.0)
Foreign Currency Translation Adjustments      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (582.7) (823.0)  
Other comprehensive income (loss) before reclassifications (17.8) 240.3  
Net amounts reclassified from AOCI/(L) 0.0 0.0  
Total other comprehensive income (loss), net of tax (17.8) 240.3  
Ending balance (600.5) (582.7) (823.0)
Pension and Other Post-Employment Benefit Plans      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance 55.2 48.8  
Other comprehensive income (loss) before reclassifications 14.9 10.2  
Net amounts reclassified from AOCI/(L) (4.2) (3.8)  
Total other comprehensive income (loss), net of tax 10.7 6.4  
Ending balance 65.9 55.2 $ 48.8
Amortization of actuarial losses      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Net amounts reclassified from AOCI/(L) 5.5 5.0  
Amortization of actuarial gains (losses), tax $ 1.3 $ 1.2