Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (Parenthetical) (USD $) In Millions	3 Months Ended	5 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2011 Successor Company	Jun. 30, 2011 Successor Company	Jan. 24, 2011 Predecessor Company	Jun. 30, 2010 Predecessor Company	Jun. 30, 2010 Predecessor Company
Other comprehensive income, net of taxes:
Tax expenses on defined benefit pension and post retirement plans	$ 0	$ 0	$ 0.5	$ 1.0	$ 2.0