Segment and Revenue Information (Schedule Of Capital Expenditures By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,834	$ 1,722	$ 1,739
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Capital expenditures	433	604	636
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Capital expenditures	202	208	210
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Capital expenditures	218	231	180
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 981	$ 679	$ 713