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Segment and Other Supplemental Information - Revenue by Product and Services (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Segment Reporting [Abstract]    
Products (software and hardware) $ 241us-gaap_SalesRevenueGoodsNet $ 273us-gaap_SalesRevenueGoodsNet
Consulting services 172us-gaap_TechnologyServicesRevenue 189us-gaap_TechnologyServicesRevenue
Maintenance services 169us-gaap_MaintenanceRevenue 166us-gaap_MaintenanceRevenue
Total services 341us-gaap_SalesRevenueServicesNet 355us-gaap_SalesRevenueServicesNet
Total revenue $ 582us-gaap_Revenues $ 628us-gaap_Revenues