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Reorganization and Business Transformation (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Mar. 31, 2016
Jun. 30, 2015
Dec. 31, 2016
Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]          
Impairment of goodwill and acquired intangibles   $ 57     $ 437
Marketing Applications          
Restructuring Cost and Reserve [Line Items]          
Severance costs       $ 14 4
Impairment of goodwill and acquired intangibles     $ 340 80 140
Other restructuring costs       35 8
Restructuring Charges       $ 129 152
Employee Severance | Marketing Applications          
Restructuring Cost and Reserve [Line Items]          
Payments for restructuring $ 20       $ 14