Segment and Revenue Information Segment and Revenue Information (Narrative) (Details) $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($) segments	Mar. 31, 2017
Segment Reporting Information [Line Items]
Number of Reportable Segments \| segments	4
Revenue, Remaining Performance Obligation \| $	$ 486,245
Fiscal Year 2019 [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Percent Recognized	30.00%
Fiscal Year 2022 [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Percent Recognized	71.00%
Transferred at Point in Time [Member] \| Operating Segments [Member] \| Commercial Airplanes Segment [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	95.00%	93.00%

The amount of the remaining performance obligation expected to be recognized as revenue.

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Percent, (excluding tax collected from customer), of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

No definition available.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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