Warranty Obligation (Tables)

9 Months Ended

Jan. 27, 2012

Product Warranties Disclosures [Abstract]

Schedule of Warranty Obligation

	Nine months ended
(in millions)	January 27,		January 28,
	2012		2011
Balance at the beginning of the period	$	35	$	31
Warranty claims provision		14		19
Settlements made		(19)		(16)
Balance at the end of the period	$	30	$	34