CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2016	Nov. 30, 2015
Cash flows from operating activities:
Net income	$ 3,864	$ 3,945
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	463	429
Amortization of intangible assets	613	875
Deferred income taxes	103	(83)
Stock-based compensation	646	507
Tax benefits on the vesting of restricted stock-based awards and exercise of stock options	249	147
Other, net	85	77
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease in trade receivables, net	1,680	1,614
(Increase) decrease in inventories	(116)	61
Decrease in prepaid expenses and other assets	321	139
Decrease in accounts payable and other liabilities	(499)	(960)
Decrease in income taxes payable	(240)	(367)
(Decrease) increase in deferred revenues	(208)	13
Net cash provided by operating activities	6,961	6,397
Cash flows from investing activities:
Purchases of marketable securities and other investments	(10,090)	(17,638)
Proceeds from maturities and sales of marketable securities and other investments	6,080	15,088
Acquisitions, net of cash acquired	(9,854)	(147)
Capital expenditures	(1,056)	(641)
Net cash used for investing activities	(14,920)	(3,338)
Cash flows from financing activities:
Payments for repurchases of common stock	(2,569)	(6,258)
Proceeds from issuances of common stock	746	640
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	(188)	(77)
Payments of dividends to stockholders	(1,232)	(1,286)
Proceeds from borrowings, net of issuance costs	13,932	0
Repayments of borrowings	(3,750)	0
Distributions to noncontrolling interests	(200)	(85)
Net cash provided by (used for) financing activities	6,739	(7,066)
Effect of exchange rate changes on cash and cash equivalents	(340)	(298)
Net decrease in cash and cash equivalents	(1,560)	(4,305)
Cash and cash equivalents at beginning of period	20,152	21,716
Cash and cash equivalents at end of period	18,592	17,411
Non-cash investing and financing transactions:
Fair values of restricted stock-based awards and stock options assumed in connection with acquisitions	84	0
(Decrease) increase in unsettled repurchases of common stock	(70)	23
Decrease in unsettled investment purchases	$ (130)	$ (142)