Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

he following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):

	Three Months Ended March 31
	2016		2015
Numerator:
Net income	$	69.3	$	62.2
Denominator:
Weighted average shares outstanding - basic	41.4		44.1
Effect of dilutive securities:
Equity compensation plans	0.4		0.7
Weighted average shares outstanding - diluted	41.8		44.8
Basic earnings per share	$	1.67	$	1.41
Diluted earnings per share	$	1.66	$	1.39