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Goodwill and Acquired Intangible Assets - Additional Information (Details) - Marketing Applications - Discontinued Operations, Held-for-sale - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Goodwill [Line Items] |  |
Goodwill | $ 57 | $ 113
Acquired intangibles, net | $ 25 | $ 44

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