Summary of Significant Accounting Policies - Separation Transaction Expenses (Detail) - USD ($) $ in Millions	11 Months Ended		12 Months Ended
	Jan. 01, 2016	Jan. 02, 2015	Jan. 30, 2015	Jan. 31, 2014
Accounting Policies [Abstract]
Strategic advisory services	$ 0		$ 0	$ 7
Legal and accounting services	0		0	2
Lease termination and facility consolidation expenses	4		3	46
Severance costs	0		0	10
Separation transaction expenses in operating income	4	$ 1	3	65
Less: income tax benefit	(2)		(1)	(25)
Separation transaction expenses, net of tax	$ 2		$ 2	$ 40