Customer Financing (Customer Financing Asset Impairment Charges) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Customer Financing [Line Items]
Impairment charges	$ (410)	$ (443)	$ (93)
Customer Financing [Member]
Customer Financing [Line Items]
Impairment charges	(24)	(270)	(39)
Customer Financing [Member] \| Boeing Capital Corporation
Customer Financing [Line Items]
Impairment charges	(32)	(53)	(1)
Customer Financing [Member] \| Other Boeing [Member]
Customer Financing [Line Items]
Impairment charges	$ (8)	$ (217)	$ (38)

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

Name:	us-gaap_AssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration