Stock-Based Compensation (Tables)

9 Months Ended

Jan. 27, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

	Three months ended				Nine months ended
	January 27,		January 28,		January 27,		January 28,
(in millions)	2012		2011		2012		2011
Stock options	$	12	$	20	$	48	$	70
Restricted stock awards/units		19		28		66		75
Employee stock purchase plan		3		4		10		11
Total stock-based compensation expense	$	34	$	52	$	124	$	156
Cost of products sold	$	3	$	5	$	10	$	17
Research and development expense		6		13		22		39
Selling, general, and administrative expense		25		34		92		100
Total stock-based compensation expense	$	34	$	52	$	124	$	156
Income tax benefits		(9)		(16)		(35)		(46)
Total stock-based compensation expense, net of tax	$	25	$	36	$	89	$	110