CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
Cash flows from operating activities:
Net income	$ 1,832	$ 1,747
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	222	219
Amortization of intangible assets	311	452
Deferred income taxes	145	(30)
Stock-based compensation	319	253
Tax benefits on the vesting of restricted stock-based awards and exercise of stock options	215	102
Other, net	39	45
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease in trade receivables, net	1,993	2,150
(Increase) decrease in inventories	(75)	50
Decrease in prepaid expenses and other assets	435	379
Decrease in accounts payable and other liabilities	(1,013)	(1,353)
Decrease in income taxes payable	(309)	(204)
Increase in deferred revenues	1,761	2,071
Net cash provided by operating activities	5,875	5,881
Cash flows from investing activities:
Purchases of marketable securities and other investments	(5,513)	(11,669)
Proceeds from maturities and sales of marketable securities and other investments	1,752	4,644
Acquisitions, net of cash acquired	(1,143)	0
Capital expenditures	(299)	(446)
Net cash used for investing activities	(5,203)	(7,471)
Cash flows from financing activities:
Payments for repurchases of common stock	(2,002)	(2,846)
Proceeds from issuances of common stock	487	296
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	(170)	(70)
Payments of dividends to stockholders	(618)	(650)
Proceeds from borrowings, net of issuance costs	13,932	0
Repayments of borrowings	(3,750)	0
Distributions to noncontrolling interests	(167)	(25)
Net cash provided by (used for) financing activities	7,712	(3,295)
Effect of exchange rate changes on cash and cash equivalents	78	(92)
Net increase (decrease) in cash and cash equivalents	8,462	(4,977)
Cash and cash equivalents at beginning of period	20,152	21,716
Cash and cash equivalents at end of period	28,614	16,739
Non-cash investing and financing transactions:
Fair values of restricted stock-based awards and stock options assumed in connection with acquisitions	6	0
(Decrease) increase in unsettled repurchases of common stock	(3)	185
Decrease in unsettled investment purchases	$ (95)	$ (342)