Warranty Obligation (Tables)

3 Months Ended

Jul. 27, 2012

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Obligations

	Three months ended
(in millions)	July 27,		July 29,
	2012		2011
Balance at the beginning of the period	$	31	$	35
Warranty claims provision		6		5
Settlements made		(6)		(6)
Balance at the end of the period	$	31	$	34