Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 567	$ (2,395)	$ 6	$ (3,036)
Currency translation adjustments	14	44	(22)	(33)
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized gain/(loss) arising during period, net of tax of ($17), $54, ($14) and ($23)	54	89	65	(186)
Unrealized loss arising during period, tax	(14)	(23)	(17)	54
Reclassification adjustment for (gains)/losses included in net earnings/(loss), net of tax of $0, ($4), $0 and ($3)		10	(2)	12
Reclassification adjustment for losses included in net earnings, tax	0	(3)	0	(4)
Total unrealized gain/(loss) on derivative instruments, net of tax	54	99	63	(174)
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service credits included in net periodic pension cost, net of tax of $12, $12, $6 and $6	(22)	(22)	(45)	(45)
Amortization of prior service cost included in net periodic pension cost, tax	6	6	12	12
Net actuarial gain/(loss) arising during the period, net of tax of ($2), $3, ($2) and $3	7	(12)	7	(12)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	(2)	3	(2)	3
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($122), ($103), ($57) and ($50)	235	197	463	390
Amortization of actuarial losses included in net periodic pension cost, tax	(57)	(50)	(122)	(103)
Settlements and curtailments included in net earnings/(loss), net of tax of ($1), ($1), ($1) and ($1)	2	2	3	2
Other Comprehensive Income, Settlements and curtailments included in net income, tax	(1)	(1)	(1)	(1)
Pension and postretirement cost related to our equity method investments, net of tax of ($1), $0, $0 and $0	1		3
Pension and post retirement benefits related to our equity method investments, tax			(1)	0
Total defined benefit pension plans and other postretirement benefits, net of tax	223	165	431	335
Other comprehensive income, net of tax	291	308	472	128
Comprehensive income/(loss), net of tax	858	(2,087)	478	(2,908)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(20)	(19)	(44)	(32)
Comprehensive income/(loss) attributable to Boeing Shareholders, net of tax	$ 878	$ (2,068)	$ 522	$ (2,876)