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Assets and Liabilities Held for Sale - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Apr. 22, 2016
Apr. 21, 2016
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Impairment of goodwill, acquired intangibles and other assets $ 76      
Goodwill, impairment loss 57      
Impairment of intangible assets, indefinite-lived (excluding goodwill) 19      
Marketing Applications | Discontinued Operations, Held-for-sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenue 34      
Operating loss (96)      
Impairment of goodwill, acquired intangibles and other assets 76      
Goodwill, impairment loss 57      
Goodwill 56     $ 113
Impairment of intangible assets, indefinite-lived (excluding goodwill) 19      
Affiliated Entity | Subsequent Event | Marketing Applications | Discontinued Operations, Held-for-sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Consideration to be received from disposal of a segment   $ 90    
Corporate Plane        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Carrying amount of asset disposal 5      
Corporate Plane | Selling, General and Administrative Expenses        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Impairment of long-lived assets to be disposed of $ 4      
Corporate Plane | Subsequent Event        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Disposal of asset, signed consideration amount     $ 5