Net (Loss) Income Per Share (Schedule Of Basic And Diluted Net (Loss) Income Per Share Calculations) (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
Numerator:
(Loss) income from continuing operations	$ (47.1)	$ 0.3	$ (76.1)	$ 55.2
Discontinued operations, net of taxes				5.1
Net (loss) income	$ (47.1)	$ 0.3	$ (76.1)	$ 60.3
Denominator:
Weighted-average common shares outstanding	100.1	100.2	100.1	103.4
Dilutive effect of stock-based awards		0.5		0.8
Weighted average shares for diluted net (loss) income per share	100.1	100.7	100.1	104.2