Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Cash provided by operations:
Net income	$ 3,760	$ 3,273	$ 2,693
Income charges (credits) not affecting cash:
Depreciation	649	606	518
Deferred income taxes	(80)	(113)	(11)
Stock-based compensation	236	191	177
Amortization and other	13	43	68
Net foreign currency adjustments	98	424	56
Changes in certain working capital components and other assets and liabilities:
Decrease (increase) in accounts receivable	60	(216)	(298)
(Increase) in inventories	(590)	(621)	(505)
(Increase) in prepaid expenses and other current assets	(161)	(144)	(210)
(Decrease) increase in accounts payable, accrued liabilities and income taxes payable	(889)	1,237	525
Cash provided by operations	3,096	4,680	3,013
Cash used by investing activities:
Purchases of short-term investments	(5,367)	(4,936)	(5,386)
Maturities of short-term investments	2,924	3,655	3,932
Sales of short-term investments	2,386	2,216	1,126
Investments in reverse repurchase agreements	150	(150)	0
Additions to property, plant and equipment	(1,143)	(963)	(880)
Disposals of property, plant and equipment	10	3	3
Decrease (increase) in other assets, net of other liabilities	6	0	(2)
Cash used by investing activities	(1,034)	(175)	(1,207)
Cash used by financing activities:
Net proceeds from long-term debt issuance	981	0	0
Long-term debt payments, including current portion	(106)	(7)	(60)
(Decrease) increase in notes payable	(67)	(63)	75
Payments on capital lease obligations	(7)	(19)	(17)
Proceeds from exercise of stock options and other stock issuances	507	514	383
Excess tax benefits from share-based payment arrangements	281	218	132
Repurchase of common stock	(3,238)	(2,534)	(2,628)
Dividends — common and preferred	(1,022)	(899)	(799)
Cash used by financing activities	(2,671)	(2,790)	(2,914)
Effect of exchange rate changes on cash and equivalents	(105)	(83)	(9)
Net (decrease) increase in cash and equivalents	(714)	1,632	(1,117)
Cash and equivalents, beginning of year	3,852	2,220	3,337
CASH AND EQUIVALENTS, END OF YEAR	3,138	3,852	2,220
Cash paid during the year for:
Interest, net of capitalized interest	70	53	53
Income taxes	748	1,262	856
Non-cash additions to property, plant and equipment	252	206	167
Dividends declared and not paid	$ 271	$ 240	$ 209