Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net income	$ 7.0	$ 49.2
Other comprehensive income
Foreign currency translation loss	(0.1)	(0.3)
Defined benefit pension and postretirement plans
Amortization of prior service benefits, net of tax of ($1.4), ($1.4)	(2.3)	(2.4)
Amortization of net actuarial loss, net of tax of $2.1, $2.3	3.9	4.1
Other comprehensive income	1.5	1.4
Total comprehensive income (loss)	$ 8.5	$ 50.6