Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income (loss)	$ 0.8	$ 4.5	$ (35.9)	$ 17.1
Other comprehensive income, net of tax:
Foreign currency translation gain (loss), net of tax of $0.0, ($0.1)	0.1	0	(0.1)	0
Defined benefit pension and postretirement plans:
Net gain arising from remeasurement during the period, net of tax of $4.2	7.3	0	7.3	0
Amortization of prior service benefits, net of tax of ($1.2), ($1.1), ($2.4), ($2.3)	(2.0)	(2.1)	(4.0)	(4.2)
Amortization of net actuarial loss, net of tax of $2.3, $2.8, $5.1, $4.8	4.0	4.8	8.8	8.3
Reclassification adjustment for curtailment gain included in net income, net of tax of ($0.2)	(0.4)	0	(0.4)	0
Other comprehensive income	9.0	2.7	11.6	4.1
Total comprehensive income (loss)	$ 9.8	$ 7.2	$ (24.3)	$ 21.2