CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	6 Months Ended
	Nov. 30, 2011	Nov. 30, 2010
Cash Flows From Operating Activities:
Net income	$ 4,032	$ 3,223
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	226	194
Amortization of intangible assets	1,184	1,217
Deferred income taxes	(137)	(76)
Stock-based compensation	298	254
Tax benefits on the exercise of stock options and vesting of restricted stock-based awards	94	142
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	(53)	(86)
Other, net	53	24
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease in trade receivables, net	2,128	1,343
Decrease in inventories	93	25
Decrease in prepaid expenses and other assets	424	280
Decrease in accounts payable and other liabilities	(1,306)	(620)
Increase (decrease) in income taxes payable	184	(613)
Decrease in deferred revenues	(544)	(546)
Net cash provided by operating activities	6,676	4,761
Cash Flows From Investing Activities:
Purchases of marketable securities and other investments	(21,422)	(16,802)
Proceeds from maturities and sales of marketable securities and other investments	16,335	11,153
Acquisitions, net of cash acquired	(571)	(806)
Capital expenditures	(289)	(239)
Net cash used for investing activities	(5,947)	(6,694)
Cash Flows From Financing Activities:
Payments for repurchases of common stock	(1,798)	(504)
Proceeds from issuances of common stock	434	734
Payments of dividends to stockholders	(607)	(504)
Proceeds from borrowings, net of issuance costs	0	3,204
Repayments of borrowings	(1,150)	(890)
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	53	86
Distributions to noncontrolling interests	(163)	(38)
Net cash (used for) provided by financing activities	(3,231)	2,088
Effect of exchange rate changes on cash and cash equivalents	(375)	351
Net (decrease) increase in cash and cash equivalents	(2,877)	506
Cash and cash equivalents at beginning of period	16,163	9,914
Cash and cash equivalents at end of period	13,286	10,420
Non-cash investing and financing transactions:
Fair value of stock options and restricted stock-based awards assumed in connection with acquisitions	1	1
Fair value of contingent consideration payable in connection with acquisition	346	0
Increase (decrease) in unsettled repurchases of common stock	$ 25	$ (4)