Stock-Based Compensation (Schedule of Stock Option Activity) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		4 Months Ended	8 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2014	Sep. 27, 2013	Jan. 01, 2016	Jan. 30, 2015
Shares of stock under stock options
Outstanding, beginning balance		3.5	4.9	3.6	4.5
Options granted		0.2	1.4	0.6	0.7
Special dividend adjustments			0.4
Options forfeited or expired		(0.4)	(1.3)	(0.9)	(1.5)
Options exercised		(0.2)		(0.9)	(0.1)
Spin-off Adjustment			(1.9)
Outstanding, ending balance	4.9	4.5	3.5	2.4	3.6
Exercisable at year end				0.8
Vested and expected to vest in the future as of year end				2.3
Weighted average exercise price
Outstanding, beginning balance		$ 59.25	$ 67.24	$ 38.50	$ 40.32
Exercisable at year end				38.39
Options granted		45.16	54.86	42.64	37.25
Options forfeited or expired		39.43	71.80	42.03	43.90
Options exercised		43.10		38.53	34.89
Outstanding, ending balance	$ 67.24	$ 40.32	59.25	38.21	$ 38.50
Spin-off Adjustment			$ 57.85
Vested and expected to vest in the future as of year end				$ 38.11
Weighted average remaining contractual term and Aggregate intrinsic value
Weighted average remaining contractual term, Outstanding	3 years	3 years 9 months 18 days	3 years 10 months 24 days	4 years 6 months	4 years
Weighted average remaining contractual term, Exercisable at year end				3 years 7 months 6 days
Weighted average remaining contractual term, Vested and expected to vest, years				4 years 6 months
Aggregate intrinsic value, Outstanding, beginning balance		$ 24		$ 14	$ 25
Aggregate intrinsic value, Outstanding, Option Exercised		1		9	1
Aggregate intrinsic value, Outstanding, ending balance		$ 25	$ 24	43	$ 14
Aggregate intrinsic value, Exercisable				15
Aggregate intrinsic value, Outstanding, Vested and expected to vest				$ 41
Stock Split
Shares of stock under stock options
Outstanding, beginning balance		4.9
Outstanding, ending balance			4.9
Weighted average exercise price
Outstanding, beginning balance		$ 40.20
Outstanding, ending balance			$ 40.20