Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Cash provided by operations:
Net income	$ 2,002	$ 1,817
Income charges (credits) not affecting cash:
Depreciation	378	322
Deferred income taxes	(56)	(56)
Stock-based compensation (Note 7)	131	128
Amortization and other	102	37
Net gain on divestitures	0	(124)
Changes in certain working capital components and other assets and liabilities:
(Increase) decrease in accounts receivable	(255)	38
(Increase) in inventories	(343)	(105)
(Increase) in prepaid expenses and other current assets	(222)	(79)
(Decrease) in accounts payable, accrued liabilities and income taxes	(54)	(286)
Cash provided by operations	1,683	1,692
Cash (used) provided by investing activities:
Purchases of short-term investments	(4,146)	(1,881)
Maturities of short-term investments	3,030	885
Sales of short-term investments	555	938
Additions to property, plant and equipment	(670)	(425)
Disposals of property, plant and equipment	1	1
Proceeds from divestitures	0	786
Increase in other assets, net of other liabilities	(16)	(18)
Cash (used) provided by investing activities	(1,246)	286
Cash used by financing activities:
Long-term debt payments, including current portion	(58)	(47)
Increase (decrease) in notes payable	37	(7)
Payments on capital lease obligations	(9)	0
Proceeds from exercise of stock options and other stock issuances	308	184
Excess tax benefits from share-based payment arrangements	108	34
Repurchase of common stock	(1,716)	(1,432)
Dividends — common and preferred	(587)	(515)
Cash used by financing activities	(1,917)	(1,783)
Effect of exchange rate changes	7	45
Net (decrease) increase in cash and equivalents	(1,473)	240
Cash and equivalents, beginning of period	3,337	2,317
CASH AND EQUIVALENTS, END OF PERIOD	1,864	2,557
Cash paid during the year for:
Dividends declared and not paid	$ 211	$ 188