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Segment, Other Supplemental Information and Concentrations - Revenue by Product and Services (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting [Abstract]                      
Recurring revenue                 $ 1,047 $ 978 $ 956
Product - perpetual licenses and hardware                 429 600 752
Consulting services                 680 675 669
Marketing applications                 0 69 153
Total revenue $ 626 $ 526 $ 513 $ 491 $ 626 $ 552 $ 599 $ 545 $ 2,156 $ 2,322 $ 2,530