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Subsequent Events - Acquisition and Restructuring Plan (Details) - Subsequent Event - USD ($)
$ in Millions
Jan. 23, 2017
Feb. 01, 2017
Dell-EMC Restructuring Plan    
Subsequent Event [Line Items]    
Expected restructuring costs remaining   $ 50
Dell-EMC Restructuring Plan | Workforce Reduction    
Subsequent Event [Line Items]    
Expected restructuring costs remaining   41
Dell-EMC Restructuring Plan | Facility Costs    
Subsequent Event [Line Items]    
Expected restructuring costs remaining   6
Dell-EMC Restructuring Plan | Other Costs    
Subsequent Event [Line Items]    
Expected restructuring costs remaining   $ 3
Dell - EMC    
Subsequent Event [Line Items]    
Purchase consideration $ 1,620