Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2011
Cash provided by operations:
Net income	$ 2,485,000,000	$ 2,223,000,000	$ 2,133,000,000
Income charges (credits) not affecting cash:
Depreciation	438,000,000	373,000,000	335,000,000
Deferred income taxes	21,000,000	(60,000,000)	(76,000,000)
Stock-based compensation (Note 11)	174,000,000	130,000,000	105,000,000
Amortization and other	75,000,000	32,000,000	23,000,000
Net gain on divestitures	(124,000,000)	0	0
Changes in certain working capital components and other assets and liabilities:
Decrease (increase) in accounts receivable	142,000,000	(323,000,000)	(273,000,000)
(Increase) in inventories	(197,000,000)	(805,000,000)	(551,000,000)
(Increase) in prepaid expenses and other current assets	(28,000,000)	(141,000,000)	(35,000,000)
Increase in accounts payable, accrued liabilities and income taxes payable	41,000,000	470,000,000	151,000,000
Cash provided by operations	3,027,000,000	1,899,000,000	1,812,000,000
Cash (used) provided by investing activities:
Purchases of short-term investments	(3,702,000,000)	(2,705,000,000)	(7,616,000,000)
Maturities of short-term investments	1,501,000,000	2,585,000,000	4,313,000,000
Sales of short-term investments	998,000,000	1,244,000,000	2,766,000,000
Additions to property, plant and equipment	(636,000,000)	(597,000,000)	(432,000,000)
Disposals of property, plant and equipment	14,000,000	2,000,000	1,000,000
Proceeds from divestitures	786,000,000	0	0
Increase in other assets, net of other liabilities	(28,000,000)	(37,000,000)	(30,000,000)
Settlement of net investment hedges	0	22,000,000	(23,000,000)
Cash (used) provided by investing activities	(1,067,000,000)	514,000,000	(1,021,000,000)
Cash used by financing activities:
Net proceeds from long-term debt issuance	986,000,000	0	0
Long-term debt payments, including current portion	(49,000,000)	(203,000,000)	(8,000,000)
Increase (decrease) in notes payable	15,000,000	(65,000,000)	41,000,000
Proceeds from exercise of stock options and other stock issuances	313,000,000	468,000,000	345,000,000
Excess tax benefits from share-based payment arrangements	72,000,000	115,000,000	64,000,000
Repurchase of common stock	(1,674,000,000)	(1,814,000,000)	(1,859,000,000)
Dividends — common and preferred	(703,000,000)	(619,000,000)	(555,000,000)
Cash used by financing activities	(1,040,000,000)	(2,118,000,000)	(1,972,000,000)
Effect of exchange rate changes	100,000,000	67,000,000	57,000,000
Net increase (decrease) in cash and equivalents	1,020,000,000	362,000,000	(1,124,000,000)
Cash and equivalents, beginning of year	2,317,000,000	1,955,000,000	3,079,000,000
CASH AND EQUIVALENTS, END OF YEAR	3,337,000,000	2,317,000,000	1,955,000,000
Cash paid during the year for:
Interest, net of capitalized interest	20,000,000	29,000,000	32,000,000
Income taxes	702,000,000	638,000,000	736,000,000
Dividends declared and not paid	$ 188,000,000	$ 165,000,000	$ 145,000,000