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]
Preferred Stock, par value (usd per share)	$ 1.00	$ 1.00
Preferred Stock, shares authorized (shares)	1,000	1,000
Preferred Stock, shares issued (shares)	546	546
Common Stock, par value (usd per share)	$ 1.00	$ 1.00
Common Stock, shares authorized (shares)	10,000	10,000
Common Stock, shares issued (shares)	5,260	5,260
Common Stock, shares outstanding (shares)	5,260	5,260