Stock-Based Compensation (Schedule of Performance-Based Stock Award Activity) (Detail) - USD ($) $ / shares in Units, $ in Millions	4 Months Ended	8 Months Ended	11 Months Ended	12 Months Ended
	Jan. 31, 2014	Sep. 27, 2013	Jan. 01, 2016	Jan. 30, 2015	Jan. 31, 2014
Expected number of shares of stock to be issued under performance-based stock awards
Shares, beginning balance (in shares)	2,400,000	3,100,000	3,000,000	3,700,000	3,100,000
Awards canceled/forfeited (in shares)	(200,000)	(400,000)	(400,000)	(500,000)
Awards granted (in shares)	400,000	2,100,000	500,000	800,000
Awards vested (in shares)		(900,000)	(800,000)	(1,000,000)
Shares, ending balance (in shares)	3,700,000	2,400,000	2,300,000	3,000,000	3,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant-date fair value, Shares, beginning balance (in dollars per share)	$ 59.98	$ 60.78	$ 38.51	$ 39.58	$ 60.78
Weighted average grant-date fair value, Awards granted (in dollars per share)	45.41	53.51	42.95	37.06
Weighted average grant-date fair value, Awards forfeited/canceled (in dollars per share)	39.75	58.28	40.10	39.05
Weighted average grant-date fair value, Awards vested (in dollars per share)		64.76	40.05	41.08
Weighted average grant-date fair value, Shares, ending balance (in dollars per share)	$ 39.58	$ 59.98	$ 38.97	$ 38.51	$ 39.58
Fair value of vesting awards that vested			$ 29	$ 34	$ 49
Performance Shares [Member]
Expected number of shares of stock to be issued under performance-based stock awards
Shares, beginning balance (in shares)		300,000	100,000	100,000	300,000
Awards canceled/forfeited (in shares)			(100,000)		(200,000)
Awards granted (in shares)			200,000	100,000	0
Awards vested (in shares)			0	(100,000)
Shares, ending balance (in shares)	100,000		200,000	100,000	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant-date fair value, Shares, beginning balance (in dollars per share)		$ 52.96	$ 37.70	$ 36.65	$ 52.96
Weighted average grant-date fair value, Awards granted (in dollars per share)			44.30	37.64
Weighted average grant-date fair value, Awards forfeited/canceled (in dollars per share)			43.49		53.11
Weighted average grant-date fair value, Awards vested (in dollars per share)				36.69
Weighted average grant-date fair value, Shares, ending balance (in dollars per share)	$ 36.65		$ 43.35	$ 37.70	$ 36.65
Performance period (in years)			3 years