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Financing Arrangements - Long-Term Debt (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 28, 2017	Apr. 28, 2017
Debt Instrument [Line Items]
Current debt obligations	$ 8,058	$ 7,520
Long-term debt
Debt premium, net	130	135
Deferred financing costs	(124)	(128)
Long-term debt	$ 25,953	25,921
Senior notes | 5.600 percent ten-year 2009 senior notes
Long-term debt
Stated interest rate	5.60%
Term of debt instrument	10 years
Long-term debt, gross	$ 400	400
Senior notes | 1.700 percent two-year 2017 senior notes
Long-term debt
Stated interest rate	1.70%
Term of debt instrument	2 years
Long-term debt, gross	$ 1,000	1,000
Senior notes | 4.450 percent ten-year 2010 senior notes
Long-term debt
Stated interest rate	4.45%
Term of debt instrument	10 years
Long-term debt, gross	$ 766	766
Senior notes | 2.500 percent five-year 2015 senior notes
Long-term debt
Stated interest rate	2.50%
Term of debt instrument	5 years
Long-term debt, gross	$ 2,500	2,500
Senior notes | Floating rate five-year 2015 senior notes
Long-term debt
Term of debt instrument	5 years
Long-term debt, gross	$ 500	500
Senior notes | 4.200 percent ten-year 2010 CIFSA senior notes
Long-term debt
Stated interest rate	4.20%
Term of debt instrument	10 years
Long-term debt, gross	$ 600	600
Senior notes | 4.125 percent ten-year 2011 senior notes
Long-term debt
Stated interest rate	4.125%
Term of debt instrument	10 years
Long-term debt, gross	$ 500	500
Senior notes | 3.125 percent ten-year 2012 senior notes
Long-term debt
Stated interest rate	3.125%
Term of debt instrument	10 years
Long-term debt, gross	$ 675	675
Senior notes | 3.150 percent seven-year 2015 senior notes
Long-term debt
Stated interest rate	3.15%
Term of debt instrument	7 years
Long-term debt, gross	$ 2,500	2,500
Senior notes | 3.200 percent ten-year 2012 CIFSA senior notes
Long-term debt
Stated interest rate	3.20%
Term of debt instrument	10 years
Long-term debt, gross	$ 650	650
Senior notes | 2.750 percent ten-year 2013 senior notes
Long-term debt
Stated interest rate	2.75%
Term of debt instrument	10 years
Long-term debt, gross	$ 530	530
Senior notes | 2.950 percent ten-year 2013 CIFSA senior notes
Long-term debt
Stated interest rate	2.95%
Term of debt instrument	10 years
Long-term debt, gross	$ 310	310
Senior notes | 3.625 percent ten-year 2014 senior notes
Long-term debt
Stated interest rate	3.625%
Term of debt instrument	10 years
Long-term debt, gross	$ 850	850
Senior notes | 3.500 percent ten-year 2015 senior notes
Long-term debt
Stated interest rate	3.50%
Term of debt instrument	10 years
Long-term debt, gross	$ 4,000	4,000
Senior notes | 3.350 percent ten-year 2017 senior notes
Long-term debt
Stated interest rate	3.35%
Term of debt instrument	10 years
Long-term debt, gross	$ 850	850
Senior notes | 4.375 percent twenty-year 2015 senior notes
Long-term debt
Stated interest rate	4.375%
Term of debt instrument	20 years
Long-term debt, gross	$ 2,382	2,382
Senior notes | 6.550 percent thirty-year 2008 CIFSA senior notes
Long-term debt
Stated interest rate	6.55%
Term of debt instrument	30 years
Long-term debt, gross	$ 374	374
Senior notes | 6.500 percent thirty-year 2009 senior notes
Long-term debt
Stated interest rate	6.50%
Term of debt instrument	30 years
Long-term debt, gross	$ 300	300
Senior notes | 5.550 percent thirty-year 2010 senior notes
Long-term debt
Stated interest rate	5.55%
Term of debt instrument	30 years
Long-term debt, gross	$ 500	500
Senior notes | 4.500 percent thirty-year 2012 senior notes
Long-term debt
Stated interest rate	4.50%
Term of debt instrument	30 years
Long-term debt, gross	$ 400	400
Senior notes | 4.000 percent thirty-year 2013 senior notes
Long-term debt
Stated interest rate	4.00%
Term of debt instrument	30 years
Long-term debt, gross	$ 325	325
Senior notes | 4.625 percent thirty-year 2014 senior notes
Long-term debt
Stated interest rate	4.625%
Term of debt instrument	30 years
Long-term debt, gross	$ 650	650
Senior notes | 4.625 percent thirty-year 2015 senior notes
Long-term debt
Stated interest rate	4.625%
Term of debt instrument	30 years
Long-term debt, gross	$ 4,150	4,150
Interest rate swaps
Long-term debt
Long-term debt, gross	41	40
Capital lease obligations
Long-term debt
Capital lease obligations	23	23
Bank borrowings
Long-term debt
Long-term debt, gross	$ 171	$ 139

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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