Variable Interest Entities - Schedule of Carrying Amounts and Classifications of VIE's Assets and Liabilities (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents		$ 186.5	$ 54.8	$ 73.2	$ 224.0
Accounts receivable		658.7	680.3
Other current assets		116.4	121.2
Total current assets		1,032.4	921.4
Property and equipment, net		2,730.1	2,601.6
Operating lease right-of-use assets		238.5	242.0
Goodwill		2,456.5	2,427.9
Intangible assets, net		398.4	417.5
Other long-term assets		226.3	254.5
Total assets	[1]	7,082.2	6,864.9
Current liabilities:
Current portion of long-term debt		49.2	42.8
Current operating lease liabilities		36.7	38.4
Accounts payable		138.3	137.6
Accrued expenses and other current liabilities		611.2	530.0
Total current liabilities		835.4	748.8
Long-term debt, net of current portion		3,233.5	3,243.9
Long-term operating lease liabilities		211.9	213.1
Total liabilities		4,537.6	4,465.7
VIE
Current assets:
Cash and cash equivalents		0.5	0.0
Accounts receivable		35.5	36.3
Other current assets		10.5	7.7
Total current assets		46.5	44.0
Property and equipment, net		115.7	116.3
Operating lease right-of-use assets		2.7	3.2
Goodwill		28.4	28.3
Intangible assets, net		3.0	3.3
Other long-term assets		31.1	31.1
Total assets		227.4	226.2
Current liabilities:
Current portion of long-term debt		1.0	1.0
Current operating lease liabilities		1.2	1.5
Accounts payable		5.9	5.9
Accrued expenses and other current liabilities		20.8	19.4
Total current liabilities		28.9	27.8
Long-term debt, net of current portion		8.1	8.6
Long-term operating lease liabilities		1.5	1.8
Total liabilities		$ 38.5	$ 38.2

[1] Our consolidated assets as of June 30, 2022 and December 31, 2021 include total assets of variable interest entities of $227.4 million and $226.2 million, respectively, which cannot be used by us to settle the obligations of other entities. Our consolidated liabilities as of June 30, 2022 and December 31, 2021 include total liabilities of the variable interest entities of $38.5 million and $38.2 million, respectively. See Note 3, Variable Interest Entities.