Goodwill And Acquired Intangibles (Schedule Of Goodwill By Reportable Segment) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 5,559	$ 5,324
Acquisitions	183	220
Goodwill adjustments	(12)	15
Goodwill, Ending Balance	7,840	5,559
Operating Segments [Member] \| Commercial Airplanes
Goodwill [Roll Forward]
Goodwill, Beginning Balance	992	992
Goodwill adjustments
Goodwill, Ending Balance	1,241	992
Operating Segments [Member] \| Defense, Space & Security
Goodwill [Roll Forward]
Goodwill, Beginning Balance	3,074	2,854
Acquisitions	180	220
Goodwill adjustments
Goodwill, Ending Balance	3,254	3,074
Operating Segments [Member] \| Global Services
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,493	1,478
Acquisitions	3
Goodwill adjustments	(12)	15
Goodwill, Ending Balance	3,345	$ 1,493
KLX Inc.
Goodwill [Roll Forward]
Acquisitions	2,110
Goodwill, Ending Balance	2,110
KLX Inc. \| Operating Segments [Member] \| Commercial Airplanes
Goodwill [Roll Forward]
Acquisitions	249
KLX Inc. \| Operating Segments [Member] \| Global Services
Goodwill [Roll Forward]
Acquisitions	$ 1,861

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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