Financing Arrangements (Tables)

3 Months Ended

Jul. 27, 2012

Debt Disclosure [Abstract]

Equity and Debt Information for Senior Convertible Notes under Convertible Debt Guidance

	2013 Senior Convertible Notes
(in millions)	July 27,		April 27,
	2012		2012
Carrying amount of the equity component	$	547	$	547
Principal amount of the 2013 Senior Convertible Notes	$	2,200	$	2,200
Unamortized discount		(67)		(90)
Net carrying amount	$	2,133	$	2,110

Interest Expense Amounts Related to Senior Convertible Notes

	2013 Senior Convertible Notes
	Three months ended
(in millions, except interest rate)	July 27,			July 29,
	2012			2011
Effective interest rate		6.03	%		6.03	%
Interest cost related to contractual interest coupon	$	9		$	9
Interest cost related to amortization of the discount	$	23		$	21