Stock Based Compensation (Stock Option Activity) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 30, 2016 USD ($) $ / shares shares
Share-based Compensation [Abstract]
Outstanding, beginning of period, shares | shares	19,678,800
Outstanding, beginning of period, weighted average exercise price | $ / shares	$ 36.65
Granted, shares | shares	3,426,400
Granted, weighted average exercise price | $ / shares	$ 63.65
Canceled or forfeited, shares | shares	(502,700)
Canceled or forfeited, weighted average exercise price | $ / shares	$ 50.69
Exercised, shares | shares	(3,772,700)
Exercised, weighted average exercise price | $ / shares	$ 33.02
Outstanding, end of period, shares | shares	18,829,800
Outstanding, end of period, weighted average exercise price | $ / shares	$ 41.92
Exercisable, end of period, shares | shares	10,958,100
Exercisable, end of period, weighted average exercise price | $ / shares	$ 32.04
Exercisable, end of period, weighted average remaining contractual life (years)	4 years
Exercisable, end of period, aggregate intrinsic value | $	$ 113
Options expected to vest, shares | shares	6,927,100
Options expected to vest, weighted average exercise price | $ / shares	$ 55.66
Options expected to vest, weighted average remaining contractual life (years)	8 years 2 months 12 days
Options expected to vest, aggregate intrinsic value | $	$ 0