CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Cash Flows From Operating Activities:
Net income	$ 2,034	$ 1,840
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	127	117
Amortization of intangible assets	619	592
Deferred income taxes	64	(116)
Stock-based compensation	193	148
Tax benefits on the exercise of stock options and vesting of restricted stock-based awards	120	39
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	(62)	(24)
Other, net	37	27
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease in trade receivables, net	2,630	2,483
Decrease in inventories	10	57
(Increase) decrease in prepaid expenses and other assets	(72)	469
Decrease in accounts payable and other liabilities	(943)	(1,374)
(Decrease) increase in income taxes payable	(329)	159
Increase in deferred revenues	1,243	1,004
Net cash provided by operating activities	5,671	5,421
Cash Flows From Investing Activities:
Purchases of marketable securities and other investments	(6,804)	(12,588)
Proceeds from maturities and sales of marketable securities and other investments	6,794	6,768
Acquisitions, net of cash acquired	(361)	(343)
Capital expenditures	(139)	(160)
Net cash used for investing activities	(510)	(6,323)
Cash Flows From Financing Activities:
Payments for repurchases of common stock	(3,076)	(800)
Proceeds from issuances of common stock	517	182
Payments of dividends to stockholders	(292)	(304)
Repayments of borrowings	(1,700)	(1,150)
Excess tax benefits on the exercise of stock options and vesting of restricted stock-based awards	62	24
Distributions to noncontrolling interests	(31)	(163)
Net cash used for financing activities	(4,520)	(2,211)
Effect of exchange rate changes on cash and cash equivalents	71	112
Net increase (decrease) in cash and cash equivalents	712	(3,001)
Cash and cash equivalents at beginning of period	14,955	16,163
Cash and cash equivalents at end of period	15,667	13,162
Non-cash investing and financing transactions:
Fair value of contingent consideration payable in connection with acquisition		346
(Decrease) increase in unsettled repurchases of common stock	$ (1)	$ 23