Consolidated Statement Of Shareholders' Equity (Deficit) (USD $) In Millions, unless otherwise specified	Total	Common Shares [Member]	Preferred Stock [Member]	Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2012	$ 136.5	$ 1.4	$ 0	$ 2,207.7	$ (2,073.0)	$ 0.4
Shareholders' Equity (Deficit) [Roll Forward]
Equity-based compensation expense	4.0	0	0	4.0	0	0
Treasury Stock, Value, Acquired, Cost Method	(0.1)	0	0	0	(0.1)	0
Accrued charitable contribution related to the MPK Coworker Incentive Plan II, net of tax	(0.6)	0	0	(0.6)	0	0
MPK Coworker Incentive Plan II units withheld for taxes	(0.1)	0	0	(0.1)	0	0
Net income (loss)	75.0	0	0	0	75.0	0
Foreign currency translation adjustment	(5.7)	0	0	0	0	(5.7)
Balance at Jun. 30, 2013	$ 209.0	$ 1.4	$ 0	$ 2,211.0	$ (1,998.1)	$ (5.3)