v3.26.1
EQUITY - AOCI Rollforward (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) (net of tax)      
Balance at the beginning of the period $ 1,331.0 $ 1,122.0 $ 1,462.0
Other comprehensive income (loss) 86.0 (16.0) (82.0)
Balance at the end of the period 1,293.0 1,331.0 1,122.0
Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income (Loss) (net of tax)      
Balance at the beginning of the period (1,160.0) (1,145.0) (1,062.0)
Other comprehensive income (loss) 86.0 (16.0) (82.0)
Balance at the end of the period (1,074.0) (1,160.0) (1,145.0)
Unrealized Gains (Losses) on Cash Flow Hedges      
Accumulated Other Comprehensive Income (Loss) (net of tax)      
Balance at the beginning of the period 1.0    
Other comprehensive income (loss) (7.0)    
Balance at the end of the period (6.0) 1.0  
Foreign Currency Translation Adjustments      
Accumulated Other Comprehensive Income (Loss) (net of tax)      
Balance at the beginning of the period (1,016.0) (967.0) (921.0)
Other comprehensive income (loss) 55.0 (48.0) (47.0)
Balance at the end of the period (961.0) (1,016.0) (967.0)
Net Change Retirement-Related Benefit Plans      
Accumulated Other Comprehensive Income (Loss) (net of tax)      
Balance at the beginning of the period (145.0) (178.0) (142.0)
Other comprehensive income (loss) 38.0 32.0 (36.0)
Balance at the end of the period $ (108.0) $ (145.0) $ (178.0)