Goodwill And Acquired Intangibles (Schedule Of Goodwill By Reportable Segment) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 8,060	$ 7,840
Acquisitions		(322)
Goodwill, Written off Related to Sale of Business Unit		(49)
Goodwill adjustments	21	(2)
Goodwill, Ending Balance	8,081	8,060
Operating Segments [Member] \| Commercial Airplanes
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,313	1,241
Acquisitions		(72)
Goodwill adjustments	3
Goodwill, Ending Balance	1,316	1,313
Operating Segments [Member] \| Defense, Space & Security
Goodwill [Roll Forward]
Goodwill, Beginning Balance	3,219	3,229
Acquisitions
Goodwill adjustments	5	(10)
Goodwill, Ending Balance	3,224	3,219
Operating Segments [Member] \| Global Services
Goodwill [Roll Forward]
Goodwill, Beginning Balance	3,441	3,345
Acquisitions		(188)
Goodwill, Written off Related to Sale of Business Unit		(49)
Goodwill adjustments	13	8
Goodwill, Ending Balance	3,454	3,441
Operating Segments [Member] \| Corporate Reconciling Items And Eliminations [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	87	25
Acquisitions		(62)
Goodwill, Ending Balance	$ 87	87
KLX Inc.
Goodwill [Roll Forward]
Acquisitions		(51)
KLX Inc. \| Operating Segments [Member] \| Global Services
Goodwill [Roll Forward]
Acquisitions		$ (51)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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