Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 5.0	$ 4.5
Accumulated depreciation property and equipment	1,771.6	1,720.7
Accumulated amortization other intangible assets	$ 325.8	$ 318.1
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares outstanding (in shares)	90,227,701	89,836,069
Treasury stock at cost (in shares)	178,540	132,930