SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2012

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Summary of computation of basic and diluted earnings per share

The table below presents the computation of basic and diluted earnings per share (in millions, except for per share information):

	Years ended December 31,
	2012		2011		2010
Basic:
Net income	$	293.2	$	236.7	$	218.0
Weighted-average shares outstanding		114.9		114.6		113.7
Basic earnings per share	$	2.55	$	2.07	$	1.92
Diluted:
Net income	$	293.2	$	236.7	$	218.0
Weighted-average shares outstanding		114.9		114.6		113.7
Dilutive effect of stock plans		3.4		4.8		5.5
Dilutive weighted-average shares outstanding		118.3		119.4		119.2
Diluted earnings per share	$	2.48	$	1.98	$	1.83

Stock-based compensation expense

Total stock-based compensation expense for the years ended December 31, 2012, 2011 and 2010 was as follows (in millions):

	December 31,
	2012		2011		2010
Cost of goods sold	$	5.0	$	4.0	$	2.7
Selling, general and administrative expenses		31.2		25.4		22.0
Research and development expenses		5.9		5.6		4.6
Total stock-based compensation expense	$	42.1	$	35.0	$	29.3