Fair Value Measurements (Tables)

3 Months Ended

Apr. 30, 2013

Fair Value Disclosures [Abstract]

Notional Amounts And Fair Values Of Interest Rate Swaps

As of April 30, 2013 and January 31, 2013, the notional amounts and fair values of these derivatives are as follows:

	April 30, 2013					January 31, 2013
(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	$	2,945	$	23		$	3,445	$	60
Receive fixed-rate, pay fixed-rate cross-currency interest rate swaps designated as net investment hedges	1,250		236			1,250		223
Receive fixed-rate, pay fixed-rate cross-currency interest rate swaps designated as cash flow hedges	2,870		190			2,944		230
Receive variable-rate, pay fixed-rate interest rate swaps designated as cash flow hedges	994		(4		)	1,056		(8		)
Receive variable-rate, pay fixed-rate forward starting interest rate swaps designated as cash flow hedges	2,500		(62		)	5,000		10
Total	$	10,559	$	383		$	13,695	$	515

Other Fair Value Disclosure [Table Text Block]

The carrying value and fair value of the Company's long-term debt as of April 30, 2013 and January 31, 2013, are as follows: 

	April 30, 2013				January 31, 2013
(Amounts in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including amounts due within one year	$	47,503	$	55,256	$	43,981	$	50,664