Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
May 31, 2014	May 31, 2013	May 31, 2012
Operating Activities:
Net income	$ 2,097us-gaap_NetIncomeLoss	$ 1,561us-gaap_NetIncomeLoss	$ 2,032us-gaap_NetIncomeLoss
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	2,587	2,386	2,113
Provision for uncollectible accounts	130us-gaap_ProvisionForDoubtfulAccounts	167us-gaap_ProvisionForDoubtfulAccounts	160us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes and other noncash items	581	521	1,126
Business realignment, impairment and other charges		479	134
Stock-based compensation	117us-gaap_ShareBasedCompensation	109us-gaap_ShareBasedCompensation	105us-gaap_ShareBasedCompensation
Changes in assets and liabilities:
Receivables	(516)us-gaap_IncreaseDecreaseInReceivables	(451)us-gaap_IncreaseDecreaseInReceivables	(254)us-gaap_IncreaseDecreaseInReceivables
Other current assets	(22)	257	(231)
Pension and postretirement healthcare assets and liabilities, net	(453)	(335)	(453)
Accounts payable and other liabilities	(235)	10	144
Other, net	(22)	(16)	(41)
Cash provided by operating activities	4,264	4,688	4,835
Investing Activities:
Capital expenditures	(3,533)	(3,375)	(4,007)
Business acquisitions, net of cash acquired	(36)	(483)	(116)
Proceeds from asset dispositions and other	18	55	74
Cash used in investing activities	(3,551)	(3,803)	(4,049)
Financing Activities:
Principal payments on debt	(254)	(417)	(29)
Proceeds from debt issuance	1,997	1,739
Proceeds from stock issuances	557	280	128
Excess tax benefit on the exercise of stock options	44	23	18
Dividends paid	(187)us-gaap_PaymentsOfDividends	(177)us-gaap_PaymentsOfDividends	(164)us-gaap_PaymentsOfDividends
Purchase of treasury stock, including accelerated share repurchase agreements	(4,857)	(246)	(197)
Other, net	(19)	(18)
Cash (used in) provided by financing activities	(2,719)	1,184	(244)
Effect of exchange rate changes on cash	(3)	5	(27)
Net (decrease) increase in cash and cash equivalents	(2,009)	2,074	515
Cash and cash equivalents at beginning of period	4,917	2,843	2,328
Cash and cash equivalents at end of period	$ 2,908	$ 4,917	$ 2,843

Amount charged against earnings for incurred and estimated costs associated with business realignment activities, such as voluntary severance costs and external professional fees, pursuant to a duly authorized plan, which have not been paid out as of the balance sheet date. Also included are non-cash asset impairment charges.

No definition available.