Acquisitions and Dispositions - Schedule of Preliminary Allocation of Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Apr. 03, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 1,225.8	$ 1,260.1		$ 1,297.1
Southern Europe
Business Acquisition [Line Items]
Cash and cash equivalents			$ 317.5
Accounts receivable			60.4
Prepaid expenses and other assets			31.4
Goodwill			33.8
Intangible assets subject to amortization, customer relationship			19.6
Intangible assets not subject to amortization, reacquired franchise rights			25.5
Property and equipment			0.4
Accounts payable			(21.6)
Employee compensation payable			(2.5)
Accrued liabilities			(9.9)
Accrued payroll taxes and insurance			(7.5)
Value added taxes payable			(7.4)
Other long-term liabilities			(24.6)
Total assets acquired and liabilities assumed			$ 415.1