Income Taxes, Other Disclosures (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Apr. 27, 2012	Apr. 27, 2012	Apr. 29, 2011	Apr. 30, 2010
Income Tax Disclsosure [Abstract]
Tax benefit associated with the release of a valuation allowance	$ (33)
Net income tax benefit associated with reversal of excess tax accruals			67
Tax cost associated with the U.S. health care reform legislation				15
Undistributed earnings from non-U.S. subsidiaries	17,977	17,977	14,912	12,373
Unrecognized tax benefits that would impact effective tax rate	858	858	685	459
Accrued income tax penalties and interest	120	120	80	94
Interest expense		$ 23	$ 12	$ 14