Condensed Consolidated Statements of Comprehensive Income (Loss) Parenthetical (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Foreign currency translation gain (loss), tax		$ 0		$ (0.1)
Net gain arising from remeasurement during the period, tax		4.2		4.2
Amortization of prior service benefits, tax	(1.4)	(1.2)	(2.8)	(2.4)
Amortization of net actuarial loss, tax	1.8	2.3	4.2	5.1
Reclassification adjustment for curtailment gain included in net income, tax		$ (0.2)		$ (0.2)