Investment in and Advances to Unconsolidated Affiliates - Affiliate Income Statement (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Investments in and Advances to Affiliates [Line Items]
Net revenue	$ 364.1	$ 324.3
Net income	42.1	36.1
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Investments in and Advances to Affiliates [Line Items]
Net revenue	177.2	138.7
Operating and SG&A expense	118.2	85.6
Depreciation and amortization	5.3	4.3
Total operating expense	123.5	89.9
Operating income	53.7	48.8
Interest and other, net	4.1	(4.6)
Net income	$ 57.8	$ 44.2