Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Computations of basic and diluted earnings per share for Income from Continuing Operations

	For the				For the
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2011		2010		2011		2010
Net income	$	33.8	$	41.8	$	71.6	$	88.5
Add: Loss from discontinued operations		—		0.1		—		0.8
Income from continuing operations	$	33.8	$	41.9	$	71.6	$	89.3
Weighted-average shares outstanding — basic		52.2		53.8		53.0		55.0
Effect of dilutive securities attributable to stock-based payments		0.6		1.2		0.9		1.2
Weighted-average shares outstanding — diluted		52.8		55.0		53.9		56.2
Earnings per share from continuing operations:
Basic	$	0.65	$	0.78	$	1.35	$	1.62
Diluted	$	0.64	$	0.76	$	1.33	$	1.59

Stock appreciation rights were outstanding but not included in diluted earnings per share calculation

	For the Nine Months Ended September 30,
	2011		2010
Number of shares		2,275,894		520,817
Price ranges per share	$	28.24 — $46.78	$	$36.94