Acquisitions and Dispositions - Schedule of Preliminary Allocation of Assets and Liabilities (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021	Oct. 01, 2021
Business Acquisition [Line Items]
Operating lease right-of-use assets		$ 314.0	$ 373.4
Goodwill	[1]	1,669.9	1,722.2
Long-term operating lease liability		$ (222.2)	$ (275.8)
Americas [Member]
Business Acquisition [Line Items]
Cash and cash equivalents				$ 14.6
Accounts receivable				132.4
Prepaid expenses and other assets				2.4
Operating lease right-of-use assets				8.7
Goodwill				515.0
Intangible assets subject to amortization, customer relationship				360.0
Accounts payable				(21.4)
Employee compensation payable				(15.0)
Accrued liabilities				(29.7)
Accrued payroll taxes and insurance				(6.9)
Value added taxes payable				(5.5)
Long-term operating lease liability				(5.3)
Other long-term liabilities				(18.4)
Total assets acquired and liabilities assumed				$ 930.9

[1] Balances were net of accumulated impairment loss of $644.2 as of both June 30, 2022 and December 31, 2021.