Derivatives and Foreign Exchange Risk Management, Fair Value Hedges (Details) (Interest Rate Swap, USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 27, 2012	Apr. 27, 2012
Interest Rate Swap
Fair Value Hedges
Notional amount of interest rate fair value hedges	$ 2,625	$ 2,625
Interest rate derivatives hedged items	the Company’s $1.250 billion 3.000 percent 2010 Senior Notes due 2015, the $600 million 4.750 percent 2005 Senior Notes due 2015, the $500 million 2.625 percent 2011 Senior Notes due 2016, the $500 million 4.125 percent 2011 Senior Notes due 2021, and the $675 million 3.125 percent 2012 Senior Notes due 2022
Unrealized gain on interest rate fair value hedging instruments	210
Unrealized loss on interest rate fair value hedged items	(210)
Interest rate fair value hedge ineffectiveness	$ 1