Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows - operation activities:
Net earnings	$ 8,197	$ 4,895	$ 5,176
Non-cash items -
Share-based plans expense	202	190	189
Depreciation and amortization	2,069	1,910	1,833
Investment/asset impairment charges, net	113	90	167
Customer financing valuation cost/(benefit)	2	(7)	(5)
(Gain)/Loss on dispositions, net	(21)	7	1
Other charges and credits, net	287	369	364
Excess tax benefits from share-based payment arrangements			157
Changes in assets and liabilities –
Accounts receivable	(1,821)	112	(1,069)
Inventories, net of advances and progress billings	(1,085)	3,755	(1,110)
Accounts payable	130	622	(238)
Accrued liabilities	573	726	2
Advances and billings in excess of related costs	3,570	(493)	1,192
Income taxes receivable, payable and deferred	857	(810)	477
Other long-term liabilities	94	(68)	46
Pension and other postretirement plans	(582)	153	2,470
Customer financing, net	1,017	(696)	167
Other	(258)	(256)	(142)
Net cash provided by operating activities	13,344	10,499	9,363
Cash flows - investing activities:
Property, plant and equipment additions	(1,739)	(2,613)	(2,450)
Property, plant and equipment reductions	92	38	42
Acquisitions, net of cash acquired	(324)	(297)	(31)
Contributions to investments	(3,601)	(1,719)	(2,036)
Proceeds from investments	3,639	1,209	2,590
Purchase of distribution rights	131
Other	2	2	39
Net cash used by investing activities	(2,062)	(3,380)	(1,846)
Cash flows - financing activities
New borrowings	2,077	1,325	1,746
Debt repayments	(953)	(1,359)	(885)
Repayments of distribution rights and other asset financing		(24)
Stock options exercised	311	321	399
Excess Tax Benefit from Share-based Compensation, Financing Activities			157
Employee taxes on certain share-based payment arrangements	(132)	(93)	(96)
Common shares repurchased	(9,236)	(7,001)	(6,751)
Dividends paid	(3,417)	(2,756)	(2,490)
Net cash used by financing activities	(11,350)	(9,587)	(7,920)
Effect of exchange rate changes on cash and cash equivalents	80	(33)	(28)
Net decrease in cash and cash equivalents	12	(2,501)	(431)
Cash and cash equivalents at beginning of year	8,801	11,302	11,733
Cash and cash equivalents at end of year	$ 8,813	$ 8,801	$ 11,302