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Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Mar. 31, 2024
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 1,901.0 $ 1,901.0
Accumulated Amortization 1,085.0 934.9
Intangible assets, net 816.0 966.1
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,821.0 1,821.0
Accumulated Amortization 1,073.0 930.9
Intangible assets, net 748.0 890.1
Trademarks and trade names    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 80.0 80.0
Accumulated Amortization 12.0 4.0
Intangible assets, net $ 68.0 $ 76.0