Summary Of Significant Accounting Policies (Narrative) (Details) $ / shares in Units, $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018 USD ($) $ / shares	Sep. 30, 2018 USD ($) $ / shares	Jun. 30, 2018 USD ($) $ / shares	Mar. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares	Sep. 30, 2017 USD ($) $ / shares	Jun. 30, 2017 USD ($) $ / shares	Mar. 31, 2017 USD ($) $ / shares	Dec. 31, 2018 USD ($) segments $ / shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Increase/(Decrease) in Revenue due to change in accounting estimate										$ 137	$ 559	$ 394
Number of Reportable Segments | segments										4
Net earnings		$ 3,424	$ 2,363	$ 2,196	$ 2,477	$ 3,320	$ 1,810	$ 1,749	$ 1,579	$ 10,460	8,458	5,034
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.										$ (190)	$ 250	$ (263)
Earnings Per Share impact, change in accounting estimate | $ / shares										$ (0.29)	$ 0.34	$ (0.36)
Reinsurance costs										$ 136	$ 144	$ 139
Reinsurance revenues										145	141	147
Research and development expense, net										3,269	3,179	$ 4,626
Accounts payable		$ 12,916				$ 12,202				$ 12,916	$ 12,202
Diluted earnings per share | $ / shares		$ 5.93	$ 4.07	$ 3.73	$ 4.15	$ 5.49	$ 2.99	$ 2.87	$ 2.54	$ 17.85	$ 13.85	$ 7.83
Net cash provided by operating activities										$ 15,322	$ 13,346	$ 10,496
Net cash used by financing activities										(11,722)	(11,350)	(9,587)
Other income/(loss), net										92	123	(438)
Interest and debt expense										(475)	(360)	(306)
Earnings before income taxes										11,604	10,107	5,783
Income Tax Expense (Benefit)										$ (1,144)	$ (1,649)	$ (749)
Income (Loss) from Continuing Operations, Per Diluted Share | $ / shares										$ 17.85	$ 13.85	$ 7.83
Retained earnings		$ 55,941				$ 49,618				$ 55,941	$ 49,618
Accumulated Other Comprehensive Income (Loss), Net of Tax	[1]	$ (15,083)				(16,373)				$ (15,083)	(16,373)	$ (13,623)	$ (12,748)
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage		20.00%								20.00%
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage		50.00%								50.00%
Bank Overdrafts [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts payable		$ 127				$ 116				$ 127	116
Commercial Airplanes | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard warranty term										3 years
Commercial Airplanes | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard warranty term										4 years
Defense, Space & Security | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard warranty term										6 months
Defense, Space & Security | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard warranty term										2 years
Developed Technology [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										4 years
Developed Technology [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										14 years
Product Know-How [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										6 years
Product Know-How [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										30 years
Customer Base [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										3 years
Customer Base [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										17 years
Distribution Rights [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										3 years
Distribution Rights [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										27 years
Other Intangible Assets [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										2 years
Other Intangible Assets [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite-lived acquired intangible assets, useful lives (in years)										32 years
Buildings And Land Improvements [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (in years)										10 years
Buildings And Land Improvements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (in years)										40 years
Machinery And Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (in years)										4 years
Machinery And Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (in years)										20 years
Capitalized Internal Use Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives (in years)										5 years
Bid And Proposal Costs [Member]
Summary Of Significant Accounting Policies [Line Items]
Research and development expense, net										$ 234	288	311
KC-46A Tanker [Member]
Summary Of Significant Accounting Policies [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.		$ (50)	$ (179)	$ (426)	$ (81)		$ (314)		$ (138)	$ (736)	$ (445)	$ (1,127)

[1] Net of tax.