Prepaid Expenses and Other (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Prepaid Expense and Other Assets [Abstract]
Prepaid expenses	$ 81.6	$ 64.0
Mobile airtime inventory	0.0	5.8
Income tax receivable	25.7	37.6
Other	20.7	20.1
Prepaid expenses and other	$ 128.0	$ 127.5