(Estimated Fair Values of Assets Acquired and Liabilities Assumed) (Detail) - USD ($) $ in Millions	Dec. 30, 2016	Aug. 16, 2016	Jan. 01, 2016	Jan. 30, 2015
Business Acquisition [Line Items]
Goodwill	$ 4,622		$ 1,207	$ 1,207
Information Systems & Global Solutions Business of Lockheed Martin
Business Acquisition [Line Items]
Cash		$ 25
Receivables, net		940
Inventory, prepaid expenses and other current assets		71
Property, plant and equipment		137
Deferred tax assets		12
Intangible assets		1,650
Other assets		23
Accounts payable and accrued liabilities		(700)
Accrued payroll and employee benefits		(190)
Long-term debt, current portion		(23)
Deferred tax liabilities		(532)
Long-term debt, net of current portion		(1,780)
Other long-term liabilities		(50)
Total identifiable net liabilities assumed		(417)
Non-controlling interest		(10)
Goodwill		3,415
Preliminary purchase price		$ 2,988