Fair Value Measurements (Tables)

9 Months Ended

Oct. 31, 2015

Fair Value Disclosures [Abstract]

Notional amounts and fair values of derivatives

As of October 31, 2015 and January 31, 2015, the notional amounts and fair values of these derivatives were as follows:

	October 31, 2015					January 31, 2015
(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	$	5,000	$	91		$	500	$	12
Receive fixed-rate, pay fixed-rate cross-currency interest rate swaps designated as net investment hedges	1,250		192			1,250		207
Receive fixed-rate, pay fixed-rate cross-currency interest rate swaps designated as cash flow hedges	4,294		(370		)	4,329		(317		)
Receive variable-rate, pay fixed-rate interest rate swaps designated as cash flow hedges	—		—			255		(1		)
Total	$	10,544	$	(87	)	$	6,334	$	(99	)

Carrying value and fair value of long-term debt

The carrying value and fair value of the Company's long-term debt as of October 31, 2015 and January 31, 2015, are as follows: 

	October 31, 2015				January 31, 2015
(Amounts in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including amounts due within one year	$	41,363	$	47,280	$	45,680	$	56,237