Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2015

Fair Value Disclosures [Abstract]

Financial Assets And Liabilities Measured At Fair Value On Recurring Basis

Financial assets and liabilities measured at fair value on a recurring basis and cash equivalents held at amortized cost are as follows:

			Fair Value Measurements at Reporting Date Using
($ in millions)	January 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	$	429	$	88	$	341	$	—
Derivative financial instruments	157		—		157		—
Deferred compensation plan assets	40		40		—		—
Total	$	626	$	128	$	498	$	—
Liabilities:
Derivative financial instruments	$	1	$	—	$	1	$	—

			Fair Value Measurements at Reporting Date Using
($ in millions)	February 1, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents	$	519	$	196	$	323	$	—
Derivative financial instruments	64		—		64		—
Deferred compensation plan assets	37		37		—		—
Total	$	620	$	233	$	387	$	—
Liabilities:
Derivative financial instruments	$	15	$	—	$	15	$	—