Acquisitions - Schedule of Preliminary Allocation of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Jun. 30, 2019	Apr. 03, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 1,262.4		$ 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		31.2
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		13.7
Accrued payroll taxes and insurance		7.5
Value added taxes payable		7.4
Other long-term liabilities		25.0
Total assets acquired and liabilities assumed		$ 408.3