CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts on trade receivables	$ 10.3	$ 10.5
Accumulated depreciation on property, plant and equipment	281.3	271.7
Accumulated amortization on intangible assets	$ 67.2	$ 61.1
Class A Common Stock [Member]
Common Stock, par value (usd per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (shares)	900,000,000	900,000,000
Common Stock, shares issued (shares)	54,862,231	54,862,231
Treasury Stock, at cost, shares (shares)	933,913	859,921