Shareholders' Equity - Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net unrealized (losses) gains on derivative financial instruments:
Net holding (losses) gains arising during the period	$ (1.0)	$ 0.8	$ 0.4	$ (1.7)
Tax benefit (expense)	0.4	(0.2)	(0.1)	0.5
Reclassification adjustment for net realized (gains) losses included in net loss	(0.6)	0.4	(1.7)	0.6
Tax expense (benefit)	0.1	(0.1)	0.5	(0.2)
Total net unrealized (losses) gains on derivative financial instruments	(1.1)	0.9	(0.9)	(0.8)
Net pension adjustments:
Reclassification of adjustments for defined benefit plans recorded in net loss	4.0	(18.4)	4.9	(16.6)
Tax benefit	(1.5)	7.0	(1.9)	6.3
Total net pension adjustments	2.5	(11.4)	3.0	(10.3)
Unrealized foreign currency translation gains (losses)	$ 3.1	$ (11.8)	$ 1.3	$ (0.8)