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Variable Interest Entities (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017
Variable Interest Entity [Line Items] |  |
Total assets | $ 6,862 | $ 5,510
Total liabilities | 7,416 | 5,687
Current Assets |  |
Variable Interest Entity [Line Items] |  |
Total assets | 5,423 | 3,976
Current Liabilities |  |
Variable Interest Entity [Line Items] |  |
Total liabilities | 5,465 | 3,601
Noncurrent Assets |  |
Variable Interest Entity [Line Items] |  |
Total assets | 1,439 | 1,534
Noncurrent Liabilities |  |
Variable Interest Entity [Line Items] |  |
Total liabilities | $ 1,951 | $ 2,086
IAE International Aero Engines AG |  |
Variable Interest Entity [Line Items] |  |
Variable Interest Entity, Methodology for Determining Whether Entity is Primary Beneficiary | Pratt & Whitney holds a net 61% interest in the International Aero Engines AG (IAE) collaboration with MTU Aero Engines AG (MTU) and Japanese Aero Engines Corporation (JAEC) and a 49.5% ownership interest in IAE. IAE's business purpose is to coordinate the design, development, manufacturing and product support of the V2500 program through involvement with the collaborators. |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 49.50% |
International Aero Engines LLC |  |
Variable Interest Entity [Line Items] |  |
Variable Interest Entity, Methodology for Determining Whether Entity is Primary Beneficiary | Additionally, Pratt & Whitney, JAEC and MTU are participants in International Aero Engines, LLC (IAE LLC), whose business purpose is to coordinate the design, development, manufacturing and product support for the PW1100G-JM engine for the Airbus A320neo aircraft and the PW1400G-JM engine for the Irkut MC21 aircraft. Pratt & Whitney holds a 59% net interest and a 59% ownership interest in IAE LLC. IAE and IAE LLC retain limited equity with the primary economics of the programs passed to the participants. |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 59.00% |

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- Definition Description of significant judgments and assumptions made by a reporting entity in determining whether it must: (1) consolidate a Variable Interest Entity (VIE) or (2) disclose information about its involvement in a VIE, and may include discussion of the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance is shared among multiple parties such that no one party is the primary beneficiary (as defined) or information about the types of involvements the reporting entity considers significant, supplemented with information about how the significant involvements were considered in determining whether the reporting entity is the primary beneficiary. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108788376&loc=SL6759159-111685 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 2AA -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108788376&loc=SL6759068-111685 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5728-111685 + Details
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