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Impairment and Sale of the Marketing Applications Business - Narrative (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jul. 01, 2016 | Dec. 31, 2018 | Sep. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Apr. 22, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Impairment of goodwill and acquired intangibles |  | $ 0 |  | $ 57,000,000 |  |  |  |  |
Impairment of goodwill, acquired intangibles and other assets |  |  |  |  |  | $ 0 | $ 0 | $ 80,000,000 |
Proceeds from sale of business |  |  |  |  |  | 0 | 0 | 92,000,000 |
Income tax (benefit) expense |  |  |  |  |  | $ (3,000,000) | $ 125,000,000 | $ 96,000,000 |
Marketing Applications |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Income tax (benefit) expense |  |  | $ 22,000,000 |  |  |  |  |  |
Income tax expense, related to goodwill |  |  | $ 14,000,000 |  |  |  |  |  |
Marketing Applications | Discontinued Operations, Held-for-sale |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  | $ 69,000,000 |  |  |  |
Operating loss |  |  |  |  | 112,000,000 |  |  |  |
Impairment of goodwill, acquired intangibles and other assets |  |  |  |  | $ 76,000,000 |  |  |  |
Marketing Applications | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Impairment of goodwill and acquired intangibles |  |  |  | 57,000,000 |  |  |  |  |
Payments to acquire intangible assets |  |  |  | $ 19,000,000 |  |  |  |  |
Affiliated Entity | Marketing Applications | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  | $ 90,000,000
Proceeds from sale of business | $ 92,000,000 |  |  |  |  |  |  |  |
Transaction cost | $ 5,000,000 |  |  |  |  |  |  |  |

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