CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2012	May 31, 2011	May 31, 2010
Cash Flows From Operating Activities:
Net income	$ 9,981	$ 8,547	$ 6,135
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	486	368	298
Amortization of intangible assets	2,430	2,428	1,973
Allowances for doubtful accounts receivable	92	164	143
Deferred income taxes	9	(253)	(511)
Stock-based compensation	659	510	436
Tax benefits on the exercise of stock options and vesting of restricted stock-based awards	182	325	203
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	(97)	(215)	(110)
Other, net	84	68	13
Changes in operating assets and liabilities, net of effects from acquisitions:
Increase in trade receivables	(8)	(729)	(362)
Decrease (increase) in inventories	150	(28)	73
(Increase) decrease in prepaid expenses and other assets	(51)	14	340
Decrease in accounts payable and other liabilities	(720)	(120)	(360)
Increase (decrease) in income taxes payable	54	(96)	(79)
Increase in deferred revenues	492	231	489
Net cash provided by operating activities	13,743	11,214	8,681
Cash Flows From Investing Activities:
Purchases of marketable securities and other investments	(38,625)	(31,009)	(15,703)
Proceeds from maturities and sales of marketable securities and other investments	35,594	27,120	11,220
Acquisitions, net of cash acquired	(4,702)	(1,847)	(5,606)
Capital expenditures	(648)	(450)	(230)
Proceeds from sale of property		105
Net cash used for investing activities	(8,381)	(6,081)	(10,319)
Cash Flows From Financing Activities:
Payments for repurchases of common stock	(5,856)	(1,160)	(992)
Proceeds from issuances of common stock	733	1,376	874
Payment of dividends to stockholders	(1,205)	(1,061)	(1,004)
Proceeds from borrowings, net of issuance costs	1,700	4,354	7,220
Repayments of borrowings	(1,405)	(3,143)	(3,582)
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	97	215	110
Distributions to noncontrolling interests	(163)	(65)	(59)
Other, net			97
Net cash (used for) provided by financing activities	(6,099)	516	2,664
Effect of exchange rate changes on cash and cash equivalents	(471)	600	(107)
Net (decrease) increase in cash and cash equivalents	(1,208)	6,249	919
Cash and cash equivalents at beginning of period	16,163	9,914	8,995
Cash and cash equivalents at end of period	14,955	16,163	9,914
Non-cash investing and financing transactions:
Fair value of stock options and restricted stock-based awards assumed in connection with acquisitions	29	17	100
Fair value of contingent consideration payable in connection with acquisition	346
Increase in unsettled repurchases of common stock	112	12
Supplemental schedule of cash flow data:
Cash paid for income taxes	2,731	2,931	2,488
Cash paid for interest	$ 737	$ 770	$ 652