CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2011
Cash Flows From Operating Activities:
Net income	$ 10,925	$ 9,981	$ 8,547
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	546	486	368
Amortization of intangible assets	2,385	2,430	2,428
Allowances for doubtful accounts receivable	118	92	164
Deferred income taxes	(117)	9	(253)
Stock-based compensation	755	659	510
Tax benefits on the exercise of stock options and vesting of restricted stock-based awards	410	182	325
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	(241)	(97)	(215)
Other, net	155	84	68
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease (increase) in trade receivables	267	(8)	(729)
(Increase) decrease in inventories	(66)	150	(28)
(Increase) decrease in prepaid expenses and other assets	(555)	(51)	14
Decrease in accounts payable and other liabilities	(541)	(720)	(120)
Increase (decrease) in income taxes payable	35	54	(96)
Increase in deferred revenues	148	492	231
Net cash provided by operating activities	14,224	13,743	11,214
Cash Flows From Investing Activities:
Purchases of marketable securities and other investments	(32,160)	(38,625)	(31,009)
Proceeds from maturities and sales of marketable securities and other investments	30,159	35,594	27,120
Acquisitions, net of cash acquired	(3,305)	(4,702)	(1,847)
Capital expenditures	(650)	(648)	(450)
Proceeds from sale of property			105
Net cash used for investing activities	(5,956)	(8,381)	(6,081)
Cash Flows From Financing Activities:
Payments for repurchases of common stock	(11,021)	(5,856)	(1,160)
Proceeds from issuances of common stock	1,527	733	1,376
Payments of dividends to stockholders	(1,433)	(1,205)	(1,061)
Proceeds from borrowings, net of issuance costs	4,974	1,700	4,354
Repayments of borrowings	(2,950)	(1,405)	(3,143)
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	241	97	215
Distributions to noncontrolling interests	(31)	(163)	(65)
Other, net	193
Net cash (used for) provided by financing activities	(8,500)	(6,099)	516
Effect of exchange rate changes on cash and cash equivalents	(110)	(471)	600
Net (decrease) increase in cash and cash equivalents	(342)	(1,208)	6,249
Cash and cash equivalents at beginning of period	14,955	16,163	9,914
Cash and cash equivalents at end of period	14,613	14,955	16,163
Non-cash investing and financing transactions:
Fair value of stock options and restricted stock-based awards assumed in connection with acquisitions	15	29	17
Fair value of contingent consideration payable in connection with acquisition		346
(Decrease) increase in unsettled repurchases of common stock	(27)	112	12
Supplemental schedule of cash flow data:
Cash paid for income taxes	2,644	2,731	2,931
Cash paid for interest	$ 781	$ 737	$ 770