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Discontinued Operations (Details) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
May 01, 2017 USD ($) agreement | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
Dispositions |  |  |  |
Cash and cash equivalents from discontinued operations |  |  |  | $ 5,000,000
Tempo Business |  |  |  |
Dispositions |  |  |  |
Number of commercial agreements | agreement | 2 |  |  |
Tempo Business | Discontinued Operations, Disposed of by Sale |  |  |  |
Dispositions |  |  |  |
Purchase price | $ 4,300,000,000 |  |  |
Depreciation of fixed assets |  | $ 8,000,000 |  |
Amortization of intangible assets |  | $ 11,000,000 |  |
Cash and cash equivalents from discontinued operations |  |  | $ 0 |
Maximum | Tempo Business | Discontinued Operations, Disposed of by Sale |  |  |  |
Dispositions |  |  |  |
Purchase price | 4,200,000,000 |  |  |
Deferred consideration | $ 500,000,000 |  |  |

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