Financing Arrangements , Short-term Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 24, 2015	Apr. 25, 2014
Short-term Debt [Line Items]
Total Short-Term Borrowings	$ 2,434	$ 1,613
Debt premium	5	0
Capital lease obligations
Short-term Debt [Line Items]
Total Short-Term Borrowings	16	14
Bank borrowings
Short-term Debt [Line Items]
Total Short-Term Borrowings	$ 303	337
Senior notes | 3.000 percent five-year 2010 senior notes
Short-term Debt [Line Items]
Stated interest rate	3.00%
Debt term	5 years
Total Short-Term Borrowings	$ 0	1,250
Senior notes | 2.625 percent five-year 2011 senior notes
Short-term Debt [Line Items]
Stated interest rate	2.625%
Debt term	5 years
Total Short-Term Borrowings	$ 500	0
Senior notes | 4.750 percent ten-year 2005 senior notes
Short-term Debt [Line Items]
Stated interest rate	4.75%
Debt term	10 years
Total Short-Term Borrowings	$ 600	0
Senior notes | 1.350 percent 2012 CIFSA senior notes
Short-term Debt [Line Items]
Stated interest rate	1.35%
Total Short-Term Borrowings	$ 600	0
Senior notes | 2.800 percent 2010 CIFSA senior notes
Short-term Debt [Line Items]
Stated interest rate	2.80%
Total Short-Term Borrowings	$ 400	0
Interest rate swaps
Short-term Debt [Line Items]
Total Short-Term Borrowings	$ 10	$ 12