Investments, Marketable Securities, Credit Losses on and Maturities of Debt Securities (Details) (USD $) In Millions, unless otherwise specified	Oct. 25, 2013	Apr. 26, 2013
Long-term
Investments	$ 11,518	$ 10,211
Long-term investments	854	843
Credit Loss Portion of Other-than-temporary Impairments on Debt Securities
Ending Balance	8	9
AFS Debt Maturities
Due in one year or less	1,408
Due after one year through five years	6,822
Due after five years through ten years	2,226
Due after ten years	104
Total debt securities	10,560
Investments [Member]
Long-term
Available-for-sale Securities	11,458	10,161
Trading Securities	60	50
Investments Other than Available-for-sale and Trading Securities	0	0
Other Assets
Long-term
Available-for-sale Securities	225	294
Trading Securities	0	0
Investments Other than Available-for-sale and Trading Securities	$ 629	$ 549

Equity method investments in common stock and investments accounted for under the cost-method that are available.

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