Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2015	Jul. 25, 2014	Apr. 24, 2015
Income Tax Contingency [Line Items]
Effective tax rate from continuing operations	12.80%	19.60%
Gross unrecognized tax benefits	$ 2,561		$ 2,860
Accrued income tax interest and penalties	580
Unrecognized tax benefits that would impact effective tax rate	1,982
Liability for Uncertain Tax Positions, Current	5
Liability for Uncertain Tax Positions, Noncurrent	$ 2,556