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Goodwill and Acquired Intangible Assets - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2016 | Dec. 31, 2016 | Jul. 01, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill, acquired during period | $ 11 | $ 11 |  |
Discontinued Operations, Held-for-sale | Marketing Applications |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill |  |  | $ 57 | $ 113
Acquired intangibles, net |  |  | $ 25 | $ 44

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