CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Cash provided by operations:
Net income	$ 567	$ 645
Income charges (credits) not affecting cash:
Depreciation	104	86
Deferred income taxes	(17)	4
Stock-based compensation	37	25
Amortization and other	33	25
Changes in certain working capital components and other assets and liabilities:
(Increase) decrease in accounts receivable	(123)	(141)
(Increase) decrease in inventories	(17)	(398)
(Increase) decrease in prepaid expenses and other current assets	(63)	(59)
Increase (decrease) in accounts payable, accrued liabilities and income taxes payable	14	(100)
Cash provided by operations	535	87
Cash provided by investing activities:
Purchases of short-term investments	(654)	(1,197)
Maturities of short-term investments	324	792
Sales of short-term investments	663	889
Additions to property, plant and equipment	(107)	(114)
Disposals of property, plant and equipment	0	1
(Decrease) increase in other assets, net of other liabilities	(5)	(32)
Settlement of net investment hedges	0	(22)
Cash provided by investing activities	221	317
Cash used by financing activities:
Reductions in long-term debt, including current portion	(42)	(132)
Increase (decrease) in notes payable	19	(18)
Proceeds from exercise of stock options and other stock issuances	39	147
Excess tax benefits from share-based payment arrangements	8	30
Repurchase of common stock	(766)	(626)
Dividends - common and preferred	(165)	(145)
Cash used by financing activities	(907)	(744)
Effect of exchange rate changes	(1)	(7)
Net decrease in cash and equivalents	(152)	(347)
Cash and equivalents, beginning of period	2,317	1,955
CASH AND EQUIVALENTS, END OF PERIOD	2,165	1,608
Supplemental disclosure of cash flow information:
Dividends declared and not paid	$ 162	$ 144