CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Accounts receivable - trade, allowance for doubtful accounts	$ 10.8	$ 10.4
Property and equipment, accumulated depreciation	331.5	289.0
Identifiable intangible assets, accumulated amortization	$ 198.2	$ 179.8
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1.0	1.0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200.0	200.0
Common stock, shares issued	105.9	105.7