Summary Of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]
Duration of operating cycle			generally longer than one year
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.			$ (224)	$ 100	$ 242
Earnings Per Share impact, change in accounting estimate			$ (0.23)	$ 0.10	$ 0.23
Reinsurance costs			$ 132	$ 144	$ 147
Reinsurance revenues			136	135	160
Research and development expense			3,331	3,047	3,071
Accounts Payable, Current			$ 10,800	10,667
Repurchase commitments, maturities			generally 10 to 15 years
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage			20.00%
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Equity Method Investment, Ownership Percentage			50.00%
Bank Overdrafts [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts Payable, Current			$ 163	241
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)			5 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)			19 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)			3 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			$ 286	$ 289	$ 285
KC-46A Tanker [Member]
Summary Of Significant Accounting Policies [Line Items]
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.	$ (835)	$ (425)