CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net income (loss)	$ 29.1	$ 159.1	$ (1.2)
Unrealized foreign currency translation gain (loss)	(5.0)	(15.1)	4.1
Net gain (loss) from pension and other postretirement benefit liabilities	(29.9)	(10.9)	1.6
Reclassification of amortization of adjustments to pension and other postretirement benefit liabilities recognized in net periodic benefit cost	2.5	1.9	3.0
Reclassification of cumulative currency translation adjustments related to investments in Canada (Note 1)		(87.9)
Income (loss) from other comprehensive income items	(32.4)	(112.0)	8.7
Provision (benefit) for income taxes	(10.2)	(3.0)	1.6
Other comprehensive income (loss)	(22.2)	(109.0)	7.1
Comprehensive income	$ 6.9	$ 50.1	$ 5.9