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Goodwill and Intangibles, net - Definite Lived Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 81.1 $ 80.1
Accumulated Amortization (22.6) (21.0)
Net $ 58.5 59.1
Trade names    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Original Useful Life 14 years  
Gross Carrying Amount $ 18.0 18.0
Accumulated Amortization (5.0) (4.6)
Net $ 13.0 13.4
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Original Useful Life 9 years  
Gross Carrying Amount $ 36.4 36.4
Accumulated Amortization (12.9) (12.1)
Net $ 23.5 24.3
Channel sharing arrangements    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Original Useful Life 35 years  
Gross Carrying Amount $ 20.2 20.2
Accumulated Amortization (1.8) (1.6)
Net $ 18.4 18.6
Other    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Original Useful Life 7 years  
Gross Carrying Amount $ 6.5 5.5
Accumulated Amortization (2.9) (2.7)
Net $ 3.6 $ 2.8