CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Cash provided by operations:
Net income	$ 1,817	$ 1,674
Income charges (credits) not affecting cash:
Depreciation	322	272
Deferred income taxes	(56)	(7)
Stock-based compensation	128	95
Amortization and other	37	48
Net gain on divestitures	(124)	0
Changes in certain working capital components and other assets and liabilities:
Decrease (increase) in accounts receivable	38	(233)
Increase in inventories	(69)	(691)
Increase in prepaid expenses and other current assets	(79)	(149)
Decrease in accounts payable, accrued liabilities and income taxes payable	(346)	(84)
Cash provided by operations	1,668	925
Cash provided by investing activities:
Purchases of short-term investments	(1,881)	(1,901)
Maturities of short-term investments	885	2,101
Sales of short-term investments	938	1,192
Additions to property, plant and equipment	(401)	(379)
Disposals of property, plant and equipment	1	1
Proceeds from divestitures	786	0
Increase in other assets, net of other liabilities	(18)	(30)
Settlement of net investment hedges	0	14
Cash provided by investing activities	310	998
Cash used by financing activities:
Reductions in long-term debt, including current portion	(47)	(201)
Decrease in notes payable	(7)	(87)
Proceeds from exercise of stock options and other stock issuances	184	372
Excess tax benefits from share-based payment arrangements	34	85
Repurchase of common stock	(1,432)	(1,585)
Dividends - common and preferred	(515)	(454)
Cash used by financing activities	(1,783)	(1,870)
Effect of exchange rate changes	45	13
Net increase in cash and equivalents	240	66
Cash and equivalents, beginning of period	2,317	1,955
CASH AND EQUIVALENTS, END OF PERIOD	2,557	2,021
Supplemental disclosure of cash flow information:
Dividends declared and not paid	$ 188	$ 165