Income Taxes (Significant Components Of Deferred Tax Assets Net Of Deferred Tax Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Valuation Allowance [Line Items]
Inventory and long-term contract methods of income recognition		$ (6,048)	$ (5,422)
Pension benefits		3,495	3,344
Deferred Tax Assets, 737 MAX customer considerations		1,626
Fixed assets, intangibles and goodwill (net of valuation allowance of $16 and $16)		(1,560)	(1,616)
Retiree health care benefits		1,120	1,124
Other employee benefits		849	873
Accrued expenses and reserves		627	411
Net operating loss, credit and capital loss carryovers (net of valuation allowance of $102 and $77)(1)		595	258
Customer and commercial financing		(268)	(309)
Other		(166)	(115)
Net deferred tax assets/(liabilities)	[1]	270	(1,452)
Deferred tax asset for net operating loss and credit carryovers each year through December 31, 2035		251
Deferred tax asset for net operating loss and credit carryovers indefinitely		344
Deferred tax assets related to Accumulated other comprehensive loss		4,589	4,275
Valuation Allowance - Fixed assets, intangibles, and goodwill deferred tax assets		118	93
Valuation Allowance - Net operating loss, credit and capital loss carryovers		102	77
Valuation Allowance, Property Plant and Equipment, Intangibles and Goodwill [Member]
Valuation Allowance [Line Items]
Valuation Allowance - Fixed assets, intangibles, and goodwill deferred tax assets		$ 16	$ 16

[1] ⁽²⁾   Included in the net deferred tax assets/(liabilities) as of December 31, 2019 and 2018 are deferred tax assets in the amounts of $4,589 and $4,275 related to Accumulated other comprehensive loss.