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Other Commitments and Contingencies - Additional Information (Detail)
$ in Millions
1 Months Ended 4 Months Ended 8 Months Ended
Dec. 17, 2014
USD ($)
Jul. 31, 2015
USD ($)
Nov. 30, 2012
USD ($)
patent
Jul. 31, 2015
USD ($)
Sep. 27, 2013
USD ($)
Jul. 03, 2015
USD ($)
Government Investigations And Reviews            
Other Commitments And Contingencies [Line Items]            
Liability for estimate of loss         $ 27  
Loss contingency accrual           $ 44
Tax Audits And Reviews            
Other Commitments And Contingencies [Line Items]            
Liabilities for uncertain tax positions           19
Other long-term liabilities           5
Unrecognized tax benefits           13
Standby Letters of Credit            
Other Commitments And Contingencies [Line Items]            
Amount outstanding           67
Performance Guarantee            
Other Commitments And Contingencies [Line Items]            
Surety bonds           $ 239
Virnet X Inc            
Other Commitments And Contingencies [Line Items]            
Number of patents infringed | patent     2      
Patents transferred and awarded $ 23   $ 368      
SAIC | Government Investigations And Reviews            
Other Commitments And Contingencies [Line Items]            
Liability for estimate of loss         18  
Predecessor | Government Investigations And Reviews            
Other Commitments And Contingencies [Line Items]            
Liability for estimate of loss         $ 45  
Subsequent Event | Virnet X Inc            
Other Commitments And Contingencies [Line Items]            
Proceeds from legal settlements   $ 8   $ 10