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Acquisitions And Divestitures Acquisition of Movimento Group (Details) - USD ($) | Jan. 03, 2017 | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 2,162,000,000 | $ 1,944,000,000
Movimento |  |  |
Business Acquisition [Line Items] |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 100.00% |  |
Purchase price, cash consideration, net of cash acquired | $ 40,000,000 |  |
Contingent consideration liability | 8,000,000 |  |
Contingent Consideration Arrangements, Range of Outcomes, Value, High | $ 10,000,000 |  |
Contingent Consideration Period | 2 years |  |
Contingent Consideration Arrangements, Range of Outcomes, Value, Low | $ 0 |  |
Business Combination, Consideration Transferred | 48,000,000 |  |
Intangible assets | 22,000,000 |  |
Other assets purchased and liabilities assumed, net | (2,000,000) |  |
Identifiable net assets acquired | 20,000,000 |  |
Goodwill | 28,000,000 |  |
Total purchase price allocation | $ 48,000,000 |  |
Customer-Related Intangible Assets | Movimento |  |  |
Business Acquisition [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 7 years |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | $ 4,000,000 |  |
Trade Names | Movimento |  |  |
Business Acquisition [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 25 years |  |
Trade Names | Movimento |  |  |
Business Acquisition [Line Items] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | $ 8,000,000 |  |
In Process Research and Development | Movimento |  |  |
Business Acquisition [Line Items] |  |  |
Indefinite-lived intangible assets | $ 10,000,000 |  |

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