Earnings Per Share (Schedule Of Weighted-Average Number Of Shares Outstanding Used To Compute Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Shares excluded from the computation of diluted earnings		2.3
Net (loss)/earnings attributable to Boeing Shareholders		$ (628)	$ 2,149
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic			2
Net earnings available to common shareholders		$ (628)	$ 2,147
Basic weighted average shares outstanding		565.9	567.7
Participating securities		0.5	0.6
Basic weighted average common shares outstanding		565.4	567.1
Basic weighted average shares outstanding		565.9	567.7
Dilutive potential common shares	[1]		4.7
Diluted weighted average shares outstanding		565.9	572.4
Participating securities		0.5	0.6
Diluted weighted average common shares outstanding		565.4	571.8
Earnings Per Share, Basic		$ (1.11)	$ 3.79
Earnings Per Share, Diluted		$ (1.11)	$ 3.75

[1] Diluted earnings per share includes any dilutive impact of stock options, restricted stock units, performance-based restricted stock units and performance awards.