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Business & Basis of Presentation - Reclassification (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue | $ 2,011 | $ 1,467 | $ 5,732 | $ 4,275
Subscription Revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue | 1,556 | 1,340 | 4,551 | 3,903
Advertising revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue | 366 | 46 | 933 | 135
Equipment |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue | 45 | 41 | 127 | 113
Other revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue | $ 44 | 40 | $ 121 | 124
As Reported |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 1,467 |  | 4,275
As Reported | Subscription Revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 1,162 |  | 3,419
As Reported | Advertising revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 46 |  | 135
As Reported | Equipment |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 41 |  | 113
As Reported | Other revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 218 |  | 608
Reclassification |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 0 |  | 0
Reclassification | Subscription Revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 178 |  | 484
Reclassification | Advertising revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 0 |  | 0
Reclassification | Equipment |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | 0 |  | 0
Reclassification | Other revenue |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Revenue |  | $ (178) |  | $ (484)

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