Summary Of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary Of Significant Accounting Policies [Line Items]
Net earnings	$ 1,631	$ 2,279	$ (234)	$ 1,219	$ 1,026	$ 1,704	$ 1,110	$ 1,336	$ 4,895	$ 5,176	$ 5,446
Duration of operating cycle									generally longer than one year
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.									$ (912)	$ (224)	$ 100
Earnings Per Share impact, change in accounting estimate									$ (1.25)	$ (0.23)	$ 0.10
Reinsurance costs									$ 139	$ 132	$ 144
Reinsurance revenues									147	136	135
Research and development expense									4,627	3,331	$ 3,047
Accounts Payable, Current	$ 11,190				$ 10,800				$ 11,190	$ 10,800
Repurchase commitments, maturities									generally 10 to 15 years
Diluted earnings per share	$ 2.59	$ 3.60	$ (0.37)	$ 1.83	$ 1.51	$ 2.47	$ 1.59	$ 1.87	$ 7.61	$ 7.44	$ 7.38
Net Cash Provided by (Used in) Operating Activities									$ 10,499	$ 9,363	$ 8,858
Net Cash Provided by (Used in) Financing Activities									$ (9,587)	(7,920)	(8,593)
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, Current	$ 77				$ 163				$ 77	163
Commercial Airplanes [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard warranty term									3 years
Commercial Airplanes [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard warranty term									4 years
Defense, Space & Security [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Standard warranty term									6 months
Defense, Space & Security [Member] | 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)									3 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									$ 311	286	289
KC-46A Tanker [Member]
Summary Of Significant Accounting Policies [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.	$ (312)		$ (573)	$ (243)			$ (835)		(1,128)	$ (835)	$ (425)
Adjustments for New Accounting Pronouncement [Member]
Summary Of Significant Accounting Policies [Line Items]
Net earnings									$ 105
Diluted earnings per share									$ 0.16
Net Cash Provided by (Used in) Operating Activities									$ 105
Net Cash Provided by (Used in) Financing Activities									$ 105