Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net (loss) income	$ (27.3)	$ 9.3	$ 93.9	$ (26.6)
Other comprehensive income, net of tax:
Foreign currency translation loss	0	0	0	(0.1)
Defined benefit pension and postretirement plans:
Net gain arising from remeasurement during the period, net of tax of $13.1, $17.3	0	22.7	0	30.0
Amortization of prior service benefits, net of tax of ($1.4), ($1.3), ($4.2), ($3.7)	(2.4)	(2.3)	(7.2)	(6.3)
Amortization of net loss included in net income, net of tax of $2.1, $2.4, $6.3, $7.5	3.6	4.4	10.8	13.2
Reclassification adjustment for curtailment gain included in net income, net of tax of ($0.2)	0	0	0	(0.4)
Other comprehensive income	1.2	24.8	3.6	36.4
Total comprehensive (loss) income	$ (26.1)	$ 34.1	$ 97.5	$ 9.8