Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2013

Fair Value Disclosures [Abstract]

Notional Amounts And Fair Values Of Interest Rate Swaps

	January 31, 2013					January 31, 2012
(Amounts in millions)	Notional Amount		Fair Value			Notional Amount		Fair Value
Receive fixed-rate, pay variable-rate interest rate swaps designated as fair value hedges	$	3,445	$	60		$	3,945	$	183
Receive fixed-rate, pay fixed-rate cross-currency interest rate swaps designated as net investment hedges	1,250		223			1,250		316
Receive fixed-rate, pay fixed-rate cross-currency interest rate swaps designated as cash flow hedges	2,944		230			2,884		(3		)
Receive variable-rate, pay fixed-rate interest rate swaps designated as cash flow hedges	1,056		(8		)	1,270		(16		)
Receive variable-rate, pay fixed-rate forward starting interest rate swaps designated as cash flow hedges	5,000		10			—		—
Total	$	13,695	$	515		$	9,349	$	480

Other Fair Value Disclosure

The carrying value and fair value of the Company's long-term debt as of January 31, 2013 and January 31, 2012, are as follows: 

	January 31, 2013				January 31, 2012
(Amounts in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including amounts due within one year	$	43,981	$	50,664	$	46,045	$	53,043