Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Cash provided by operations:
Net income	$ 1,092	$ 950
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	178	179
Deferred income taxes	18	(59)
Stock-based compensation	41	50
Amortization and other	3	6
Net foreign currency adjustments	166	(19)
Changes in certain working capital components and other assets and liabilities:
(Increase) in accounts receivable	(294)	(101)
(Increase) in inventories	(25)	(96)
(Increase) in prepaid expenses and other current and non-current assets	(83)	(543)
Increase in accounts payable, accrued liabilities and other current and non-current liabilities	205	208
Cash provided by operations	1,301	575
Cash used by investing activities:
Purchases of short-term investments	(980)	(1,663)
Maturities of short-term investments	400	1,403
Sales of short-term investments	586	518
Additions to property, plant and equipment	(343)	(270)
Disposals of property, plant and equipment	4	0
Cash used by investing activities	(333)	(12)
Cash used by financing activities:
Long-term debt payments, including current portion	(1)	(1)
(Decrease) increase in notes payable	(321)	9
Payments on capital lease and other financing obligations	(6)	(6)
Proceeds from exercise of stock options and other stock issuances	187	158
Repurchase of common stock	(1,360)	(804)
Dividends — common and preferred	(320)	(300)
Tax payments for net share settlement of equity awards	(11)	(54)
Cash used by financing activities	(1,832)	(998)
Effect of exchange rate changes on cash and equivalents	(103)	40
Net decrease in cash and equivalents	(967)	(395)
Cash and equivalents, beginning of period	4,249	3,808
CASH AND EQUIVALENTS, END OF PERIOD	3,282	3,413
Supplemental disclosure of cash flow information:
Non-cash additions to property, plant and equipment	110	98
Dividends declared and not paid	$ 318	$ 295