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Summary of Accounting Principles (Details) € in Millions, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 03, 2020 shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2019 EUR (€)
Accounting Policies [Abstract] |  |  |  |  |
Restricted Cash And Cash Equivalents |  | $ 24 | $ 38 |  |
Unbilled Contracts Receivable |  | 265 | 439 |  |
Capitalized Contract Cost, Net |  | 1,519 | 914 |  |
Operating profit impact of contract adjustments |  | (69) | (50) | $ (110) |
Revenue, Remaining Performance Obligation, Amount |  | $ 111,700 | $ 93,800 |  |
Revenue, Remaining Performance Obligations, to be recognized within 24 months |  | 37.00% |  |  | 37.00%
Long-term debt, euro-denominated | € |  |  |  |  | € 4,200
Collaborators interests existing programs low end |  | 13.00% |  |  | 13.00%
Collaborators interests existing programs high end |  | 49.00% |  |  | 49.00%
Partner share individual program maximum |  | 31.00% |  |  | 31.00%
Carrier [Member] |  |  |  |  |
Accounting Policies [Abstract] |  |  |  |  |
Shares of common stock distributed in the Distribution | shares | 866,158,910 |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Shares of common stock distributed in the Distribution | shares | 866,158,910 |  |  |  |
Otis [Member] |  |  |  |  |
Accounting Policies [Abstract] |  |  |  |  |
Shares of common stock distributed in the Distribution | shares | 433,079,455 |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Shares of common stock distributed in the Distribution | shares | 433,079,455 |  |  |  |

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