Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions		11 Months Ended		12 Months Ended
	Oct. 11, 2013	Jan. 01, 2016	Jan. 02, 2015	Jan. 30, 2015	Jan. 31, 2014
Business Acquisition [Line Items]
Bad debt expense		$ 8	$ 4	$ 5	$ 44
Plainfield Renewal Energy Holdings LLC
Business Acquisition [Line Items]
Property, plant and equipment	$ 248
Other assets	8
Notes payable assumed (net of debt discount)	(148)
Total identifiable net assets acquired	108
Intangible assets	3
Total purchase consideration	$ 111
Bad debt expense				$ 32