Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014
Cash provided by operations:
Net income	$ 2,408	$ 1,995
Income charges (credits) not affecting cash:
Depreciation	453	378
Deferred income taxes	43	(56)
Stock-based compensation (Note 6)	140	131
Amortization and other	28	53
Net foreign currency adjustments	411	59
Changes in certain working capital components and other assets and liabilities:
(Increase) in accounts receivable	(109)	(255)
(Increase) in inventories	(510)	(349)
(Increase) in prepaid expenses and other current assets	(31)	(222)
Increase (decrease) in accounts payable, accrued liabilities and income taxes payable	505	(49)
Cash provided by operations	3,338	1,685
Cash used by investing activities:
Purchases of short-term investments	(3,754)	(4,235)
Maturities of short-term investments	2,624	2,885
Sales of short-term investments	1,718	789
Investments in reverse repurchase agreements	(250)	0
Additions to property, plant and equipment	(723)	(670)
Disposals of property, plant and equipment	3	1
(Increase) in other assets, net of other liabilities	0	(1)
Cash used by investing activities	(382)	(1,231)
Cash used by financing activities:
Long-term debt payments, including current portion	(5)	(58)
(Decrease) increase in notes payable	(83)	37
Payments on capital lease obligations	(16)	(9)
Proceeds from exercise of stock options and other stock issuances	372	308
Excess tax benefits from share-based payment arrangements	150	108
Repurchase of common stock	(1,855)	(1,716)
Dividends — common and preferred	(658)	(587)
Cash used by financing activities	(2,095)	(1,917)
Effect of exchange rate changes on cash and equivalents	(66)	(10)
Net increase (decrease) in cash and equivalents	795	(1,473)
Cash and equivalents, beginning of period	2,220	3,337
CASH AND EQUIVALENTS, END OF PERIOD	3,015	1,864
Cash paid during the year for:
Non-cash additions to property, plant and equipment	95	117
Dividends declared and not paid	$ 241	$ 211