Goodwill and Intangibles, net - Definite Lived Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 134.6	$ 80.1
Accumulated Amortization	(28.0)	(21.0)
Net	$ 106.6	59.1
Trade names
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	14 years
Gross Carrying Amount	$ 25.4	18.0
Accumulated Amortization	(5.8)	(4.6)
Net	$ 19.6	13.4
Customer relationships and contracts
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	11 years
Gross Carrying Amount	$ 88.3	36.4
Accumulated Amortization	(18.1)	(12.1)
Net	$ 70.2	24.3
Channel sharing arrangements
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	35 years
Gross Carrying Amount	$ 12.6	20.2
Accumulated Amortization	(1.0)	(1.6)
Net	$ 11.6	18.6
Other
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Original Useful Life	8 years
Gross Carrying Amount	$ 8.3	5.5
Accumulated Amortization	(3.1)	(2.7)
Net	$ 5.2	$ 2.8