Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Stock-Based Compensation

Summary of the total compensation expense and associated recognized income tax benefits

	Three Months Ended March 31,
	2012			2011
Compensation expense	$	7.5		$	9.1
Income tax benefit		(2.9	)		(3.5	)
Total	$	4.6		$	5.6