Restructuring Expenses	6 Months Ended
Restructuring Expenses	Jul. 01, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring Expenses	Restructuring Expenses In fiscal 2014, in anticipation of the spin-off of New SAIC from the Company, the Company initiated an overall spin-off program to align the Company’s cost structure for post spin-off. The Company reduced headcount and reduced its real estate footprint by vacating facilities that are not necessary for its future requirements. The Company has continued its real estate optimization initiatives post separation to improve its cost profile and has exited real estate leases and incurred restructuring charges consisting of various expenses such as lease termination fees, asset impairment charges and lease vacancy reserves. The Company incurred lease termination expenses in its Corporate and Other segment of $1 million for the six months ended July 1, 2016 for lease losses and $2 million in the corresponding prior period ending July 3, 2015 related to an adjustment to reserves for lease losses from the spin-off due to revised sublease income assumptions. The Company incurred $1 million of lease termination expenses for the quarter ended July 1, 2016, and incurred no lease termination expenses for the quarter ended July 3, 2015. The restructuring liability for lease termination expenses as of July 1, 2016, decreased by $2 million to $5 million from January 1, 2016 due to the relief of the liability of $3 million from the related rent cash payments, offset by additional lease termination expenses of $1 million. The Company expects the restructuring liability to be fully settled beyond one year and expects to incur additional facility restructuring costs in connection with the Transactions (see "Note 2–Lockheed Martin Transaction").
Leidos, Inc.
Restructuring Cost and Reserve [Line Items]
Restructuring Expenses	Restructuring Expenses In fiscal 2014, in anticipation of the spin-off of New SAIC from the Company, the Company initiated an overall spin-off program to align the Company’s cost structure for post spin-off. The Company reduced headcount and reduced its real estate footprint by vacating facilities that are not necessary for its future requirements. The Company has continued its real estate optimization initiatives post separation to improve its cost profile and has exited real estate leases and incurred restructuring charges consisting of various expenses such as lease termination fees, asset impairment charges and lease vacancy reserves. The Company incurred lease termination expenses in its Corporate and Other segment of $1 million for the six months ended July 1, 2016 for lease losses and $2 million in the corresponding prior period ending July 3, 2015 related to an adjustment to reserves for lease losses from the spin-off due to revised sublease income assumptions. The Company incurred $1 million of lease termination expenses for the quarter ended July 1, 2016, and incurred no lease termination expenses for the quarter ended July 3, 2015. The restructuring liability for lease termination expenses as of July 1, 2016, decreased by $2 million to $5 million from January 1, 2016 due to the relief of the liability of $3 million from the related rent cash payments, offset by additional lease termination expenses of $1 million. The Company expects the restructuring liability to be fully settled beyond one year and expects to incur additional facility restructuring costs in connection with the Transactions (see "Note 2–Lockheed Martin Transaction").