Related Party Transactions (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended			8 Months Ended
	Jun. 28, 2013	Nov. 01, 2013	Nov. 01, 2013 Leidos Holdings Inc,	Jan. 31, 2013 Leidos Holdings Inc,	Sep. 27, 2013 Leidos, Inc. SAIC	Nov. 01, 2013 Notes Which Mature In December 2020	Nov. 01, 2013 Notes Which Mature In December 2040	Nov. 01, 2013 Notes Which Mature In July 2033	Nov. 01, 2013 Notes Which Mature In July 2032
Related Party Transaction [Line Items]
Notes payable, related parties						$ 450	$ 300	$ 300	$ 250
Stated interest rate						4.45%	5.95%	5.50%	7.13%
Credit facility, maturity date		2018
Amount outstanding under credit facility		700
Period extension for portions of intercompany loans (years)		1 year
Note receivable from Leidos Holdings, Inc.			1,100
Notes payable				22
Distribution of assets and liabilites upon separation					722
Dividend paid	$ 342				$ 356