Financing Arrangements (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2015	May. 31, 2015
Financing Arrangements (Details) [Line Items]
Line Of Credit Facility Maximum Borrowing Capacity	$ 1,000
Line Of Credit Facility Current Borrowing Capacity	1,000
Long Term Debt Exclusive of Capital Leases Carrying Value	7,200	$ 7,200
Long Term Debt Exclusive Of Capital Leases Fair Value	$ 7,200	$ 7,400
Line of Credit Facility, Expiration Date	Mar. 01, 2018
Line Of Credit Facility Covenant Terms Maximum Leverage Ratio	70%
Line Of Credit Facility Covenant Terms Leverage Ratio	61%