Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Cash provided by operations:
Net income	$ 950	$ 1,249
Income charges (credits) not affecting cash:
Depreciation	179	173
Deferred income taxes	(59)	(50)
Stock-based compensation	50	57
Amortization and other	6	7
Net foreign currency adjustments	(19)	(61)
Changes in certain working capital components and other assets and liabilities:
(Increase) in accounts receivable	(101)	(284)
(Increase) in inventories	(96)	(62)
(Increase) in prepaid expenses and other current assets	(543)	(63)
Increase (decrease) in accounts payable, accrued liabilities and income taxes payable	208	(178)
Cash provided by operations	575	788
Cash used by investing activities:
Purchases of short-term investments	(1,663)	(1,279)
Maturities of short-term investments	1,403	562
Sales of short-term investments	518	960
Additions to property, plant and equipment	(270)	(277)
Other investing activities	0	(42)
Cash used by investing activities	(12)	(76)
Cash used by financing activities:
Long-term debt payments, including current portion	(1)	(2)
Increase in notes payable	9	21
Payments on capital lease and other financing obligations	(6)	(2)
Proceeds from exercise of stock options and other stock issuances	158	112
Repurchase of common stock	(804)	(1,054)
Dividends — common and preferred	(300)	(269)
Tax payments for net share settlement of equity awards	(54)	(8)
Cash used by financing activities	(998)	(1,202)
Effect of exchange rate changes on cash and equivalents	40	11
Net decrease in cash and equivalents	(395)	(479)
Cash and equivalents, beginning of period	3,808	3,138
CASH AND EQUIVALENTS, END OF PERIOD	3,413	2,659
Supplemental disclosure of cash flow information:
Non-cash additions to property, plant and equipment	98	96
Dividends declared and not paid	$ 295	$ 272