CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Cash flows from operating activities:
Net income	$ 418	$ 6,103
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	878	722
Amortization of intangible assets	1,205	1,010
Deferred income taxes	(613)	111
Stock-based compensation	1,211	1,017
Other, net	(63)	96
Changes in operating assets and liabilities, net of effects from acquisitions:
Decrease in trade receivables, net	1,484	1,673
Increase in inventories	(195)	(178)
Decrease in prepaid expenses and other assets	76	308
Decrease in accounts payable and other liabilities	(606)	(862)
Increase (decrease) in income taxes payable	7,444	(10)
Decrease in deferred revenues	(513)	(330)
Net cash provided by operating activities	10,726	9,660
Cash flows from investing activities:
Purchases of marketable securities and other investments	(24,496)	(15,571)
Proceeds from maturities and sales of marketable securities and other investments	17,069	11,825
Acquisitions, net of cash acquired	0	(10,406)
Capital expenditures	(1,358)	(1,496)
Net cash used for investing activities	(8,785)	(15,648)
Cash flows from financing activities:
Payments for repurchases of common stock	(6,421)	(3,067)
Proceeds from issuances of common stock	2,116	1,309
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	(467)	(237)
Payments of dividends to stockholders	(2,362)	(1,844)
Proceeds from borrowings, net of issuance costs	9,945	13,932
Repayments of borrowings	(7,300)	(4,094)
Distributions to noncontrolling interests	(34)	(200)
Net cash (used for) provided by financing activities	(4,523)	5,799
Effect of exchange rate changes on cash and cash equivalents	285	(215)
Net decrease in cash and cash equivalents	(2,297)	(404)
Cash and cash equivalents at beginning of period	21,784	20,152
Cash and cash equivalents at end of period	19,487	19,748
Non-cash investing and financing transactions:
Fair values of restricted stock-based awards and stock options assumed in connection with acquisitions	0	90
Change in unsettled repurchases of common stock	80	(69)
Change in unsettled investment purchases	$ (299)	$ 5