CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 29, 2012	Feb. 28, 2011
Cash provided by operations:
Net income	$ 1,674	$ 1,539
Income charges (credits) not affecting cash:
Depreciation	272	249
Deferred income taxes	(7)	(70)
Stock-based compensation	95	78
Amortization and other	48	11
Changes in certain working capital components and other assets and liabilities:
(Increase) decrease in accounts receivable	(233)	(170)
(Increase) decrease in inventories	(691)	(399)
(Increase) decrease in prepaid expenses and other assets	(149)	8
(Decrease) increase in accounts payable, accrued liabilities and income taxes	(84)	(276)
Cash provided by operations	925	970
Cash provided (used) by investing activities:
Purchases of investments	(1,901)	(6,029)
Maturities of investments	2,101	3,129
Sales of investments	1,192	2,618
Additions to property, plant and equipment	(379)	(303)
Proceeds from the sale of property, plant and equipment	1	1
Increase in other assets and liabilities, net	(30)	(10)
Settlement of net investment hedges	14	(8)
Cash provided (used) by investing activities	998	(602)
Cash used by financing activities:
Reduction in long-term debt, including current portion	(201)	(6)
Decrease in notes payable	(87)	(5)
Proceeds from exercise of stock options and other stock issuances	372	279
Excess tax benefits from share-based payment arrangements	85	54
Repurchase of common stock	(1,585)	(1,252)
Dividends on common stock	(454)	(408)
Cash used by financing activities	(1,870)	(1,338)
Effect of exchange rate changes on cash	13	23
Net increase (decrease) in cash and equivalents	66	(947)
Cash and equivalents, beginning of period	1,955	3,079
Cash and equivalents, end of period	2,021	2,132
Supplemental disclosure of cash flow information:
Dividends declared and not paid	$ 165	$ 147