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Reorganization and Business Transformation (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Mar. 31, 2016
Sep. 30, 2016
Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]      
Goodwill, impairment loss   $ 57 $ 318
Marketing Applications      
Restructuring Cost and Reserve [Line Items]      
Severance costs   12  
Goodwill, impairment loss   80  
Other restructuring costs   27  
International Marketing Application      
Restructuring Cost and Reserve [Line Items]      
Impairment of goodwill and acquired intangibles $ 80    
Employee Severance | Marketing Applications      
Restructuring Cost and Reserve [Line Items]      
Payments for restructuring   $ 18