Long-term Debt and Other Financing Arrangements - Additional Information (Details) - USD ($)		12 Months Ended
	Jan. 06, 2017	May 31, 2017	May 31, 2016
Line Of Credit Facility [Line Items]
Long-term debt weighted average interest rate		3.60%
Long Term Debt Exclusive Of Capital Leases Fair Value		$ 15,500,000,000	$ 14,300,000,000
Line of Credit Facility, Expiration Date		Nov. 13, 2020
Financial Covenant Terms Ratio		350.00%
Financial Covenant Compliance Ratio		190.00%
Letters Of Credit Outstanding		$ 317,000,000
Commercial paper outstanding		$ 0
Revolving Credit Facility [Member]
Line Of Credit Facility [Line Items]
Line of Credit Facility, Term		5 years
Line Of Credit Facility Maximum Borrowing Capacity		$ 1,750,000,000
Letter of Credit [Member]
Line Of Credit Facility [Line Items]
Letter of Credit Maximum Sublimit Amount		500,000,000
Letter of Credit Outstanding Sublimit Unused Amount		$ 183,000,000
Senior Unsecured Debt due March 2027 and January 2047 [Member]
Line Of Credit Facility [Line Items]
Senior Unsecured Debt Issued	$ 1,200,000,000
Senior Unsecured Debt, Frequency of Periodic Interest Payment	semiannually
3.30% Senior Unsecured Debt due March 2027 [Member]
Line Of Credit Facility [Line Items]
Senior Unsecured Debt Issued	$ 450,000,000
Senior Unsecured Debt, Fixed Interest Rate Percentage	3.30%
Senior Unsecured Debt, Maturity Date	Mar. 15, 2027
4.40% Senior Unsecured Debt due January 2047 [Member]
Line Of Credit Facility [Line Items]
Senior Unsecured Debt Issued	$ 750,000,000
Senior Unsecured Debt, Fixed Interest Rate Percentage	4.40%
Senior Unsecured Debt, Maturity Date	Jan. 15, 2047
EURIBOR [Member]
Line Of Credit Facility [Line Items]
Floating Rate Basis Points, Description		Our floating-rate Euro senior notes bear interest at three-month EURIBOR plus a spread of 55 basis points and resets quarterly.
Floating Rate Basis Points		0.55%