Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities
Net income including noncontrolling interest	$ 1,201us-gaap_ProfitLoss	$ 1,225us-gaap_ProfitLoss
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities
Depreciation and amortization	339	350
Company pension and postretirement contributions	(91)	(42)
Company pension and postretirement expense	134	98
Stock-based compensation expense	138us-gaap_ShareBasedCompensation	122us-gaap_ShareBasedCompensation
Deferred income taxes	44us-gaap_DeferredIncomeTaxExpenseBenefit	(83)us-gaap_DeferredIncomeTaxExpenseBenefit
Excess tax benefits from stock-based compensation	(101)	(51)
Changes in assets and liabilities
Accounts receivable	(296)us-gaap_IncreaseDecreaseInReceivables	(347)us-gaap_IncreaseDecreaseInReceivables
Inventories	(131)us-gaap_IncreaseDecreaseInInventories	(131)us-gaap_IncreaseDecreaseInInventories
Accounts payable	56	84
Accrued income taxes (current and long-term)	100	135
Other - net	(313)	(268)
Net cash provided by operating activities	1,080	1,092
Cash Flows from Investing Activities
Purchases of property, plant and equipment (PP&E)	(291)	(293)
Proceeds from sale of PP&E and other assets	4	3
Acquisitions, net of cash acquired	(150)	0
Purchases of marketable securities and investments	(191)us-gaap_PaymentsToAcquireInvestments	(601)us-gaap_PaymentsToAcquireInvestments
Proceeds from maturities and sale of marketable securities and investments	605	599
Proceeds from sale of businesses	19	0
Other investing	4	5
Net cash used in investing activities	0	(287)
Cash Flows from Financing Activities
Change in short-term debt - net	(4)	466
Repayment of debt (maturities greater than 90 days)	0	(64)
Proceeds from debt (maturities greater than 90 days)	0	172
Purchases of treasury stock	(886)	(1,708)
Proceeds from issuance of treasury stock pursuant to stock option and benefit plans	309us-gaap_ProceedsFromSaleOfTreasuryStock	267us-gaap_ProceedsFromSaleOfTreasuryStock
Dividends paid to shareholders	(652)us-gaap_PaymentsOfDividendsCommonStock	(566)us-gaap_PaymentsOfDividendsCommonStock
Excess tax benefits from stock-based compensation	101	51
Other - net	(22)	(17)
Net cash used in financing activities	(1,154)	(1,399)
Effect of exchange rate changes on cash and cash equivalents	(32)	(33)
Net increase (decrease) in cash and cash equivalents	(106)	(627)
Cash and cash equivalents at beginning of year	1,897	2,581
Cash and cash equivalents at end of period	$ 1,791	$ 1,954

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.