CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Cash Flows From Operating Activities:
Net income	$ 7,119	$ 6,529
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	400	350
Amortization of intangible assets	1,789	1,790
Deferred income taxes	108	(200)
Stock-based compensation	566	474
Tax benefits on the exercise of stock options and vesting of restricted stock-based awards	372	123
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	(220)	(71)
Other, net	120	67
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease in trade receivables, net	2,269	2,028
(Increase) decrease in inventories	(48)	139
(Increase) decrease in prepaid expenses and other assets	(241)	87
Decrease in accounts payable and other liabilities	(912)	(1,353)
(Decrease) increase in income taxes payable	(853)	259
Decrease in deferred revenues	(809)	(536)
Net cash provided by operating activities	9,660	9,686
Cash Flows From Investing Activities:
Purchases of marketable securities and other investments	(24,027)	(29,745)
Proceeds from maturities and sales of marketable securities and other investments	22,359	26,472
Acquisitions, net of cash acquired	(1,592)	(2,833)
Capital expenditures	(467)	(431)
Net cash used for investing activities	(3,727)	(6,537)
Cash Flows From Financing Activities:
Payments for repurchases of common stock	(8,204)	(3,457)
Proceeds from issuances of common stock	1,300	513
Payments of dividends to stockholders	(1,433)	(909)
Proceeds from borrowings, net of issuance costs	4,974
Repayments of borrowings	(1,700)	(1,405)
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	220	71
Distributions to noncontrolling interests	(31)	(163)
Net cash used for financing activities	(4,874)	(5,350)
Effect of exchange rate changes on cash and cash equivalents	87	(181)
Net increase (decrease) in cash and cash equivalents	1,146	(2,382)
Cash and cash equivalents at beginning of period	14,955	16,163
Cash and cash equivalents at end of period	16,101	13,781
Non-cash investing and financing transactions:
Fair value of stock options and restricted stock-based awards assumed in connection with acquisitions	3	19
Fair value of contingent consideration payable in connection with acquisition		346
(Decrease) increase in unsettled repurchases of common stock	$ (36)	$ 26