Condensed Consolidated Statement of Cash Flows Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Cash flows - operation activities:
Net earnings		$ 2,363	$ 1,810	$ 7,036	$ 5,138
Non-cash items -
Share-based plans expense				150	151
Depreciation and amortization				1,531	1,470
Asset Impairment Charges				63	75
Customer financing valuation (benefit)/expense				(3)	4
Gain on dispositions, net		69		76
Other charges and credits, net				(158)	(196)
Changes in assets and liabilities -
Accounts receivable				(10)	558
Unbilled receivables				1,732	1,805
Advances and progress billings				3,457	4,714
Inventories				173	800
Other current assets				5	337
Accounts payable				1,181	780
Accrued liabilities				890	(102)
Income taxes receivable, payable and deferred				(252)	1,507
Other long-term liabilities				1	25
Pension and other postretirement plans				(89)	(550)
Customer financing, net				(175)	634
Other				(403)	99
Net cash provided by operating activities				12,375	10,443
Cash flows - investing activities:
Payments to Acquire Property, Plant, and Equipment				1,227	1,304
Property, plant and equipment reductions				117	30
Acquisitions, net of cash acquired				250
Contributions to investments				2,145	2,815
Proceeds from investments				1,369	2,612
Purchase of distribution rights				(56)	(131)
Other				(5)	7
Net cash provided/(used) by investing activities				(2,197)	(1,601)
Cash flows - financing activities:
New borrowings				4,696	876
Debt repayments				4,029	83
Contributions from noncontrolling interests				35
Stock options exercised				70	291
Employee taxes on certain share-based payment arrangements				247	118
Common shares repurchased				8,415	7,500
Dividends paid				2,976	2,575
Net cash used by financing activities				(10,866)	(9,109)
Effect of exchange rate changes on cash and cash equivalents, including restricted				(37)	73
Net decrease in cash & cash equivalents, including restricted				(725)	(194)
Cash & cash equivalents, including restricted, at beginning of year				8,887	8,869	$ 8,869
Cash & cash equivalents, including restricted, at end of period		8,162	8,675	8,162	8,675	8,887
Restricted Cash and Cash Equivalents	[1]	(128)	(106)	(128)	(106)	(74)
Cash and cash equivalents at end of period		$ 8,034	$ 8,569	$ 8,034	$ 8,569	$ 8,813

[1] Reflects amounts restricted in support of our workers’ compensation programs, employee benefit programs, and insurance premiums.