Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets - Schedule of Finite-Lived Assets (Details)

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Goodwill and Other Intangible Assets - Schedule of Finite-Lived Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 66.1 $ 63.0
Accumulated Amortization (20.2) (17.2)
Net Carrying Amount 45.9 45.8
Customer Relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 55.2 51.4
Accumulated Amortization (9.3) (6.4)
Net Carrying Amount 45.9 45.0
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 10.9 11.6
Accumulated Amortization (10.9) (10.8)
Net Carrying Amount $ 0.0 $ 0.8