Derivative Financial Instruments (Tables)

3 Months Ended

Apr. 30, 2015

Summary of Derivative Instruments [Abstract]

Schedule of derivative instruments in statement of financial position, fair value

The Company's derivative instruments, as well as its nonderivative debt instruments designated and qualifying as net investment hedges, were classified as follows in the Company's Condensed Consolidated Balance Sheets:

	April 30, 2015						January 31, 2015
(Amounts in millions)	Fair Value Instruments		Net Investment Instruments		Cash Flow Instruments		Fair Value Instruments		Net Investment Instruments		Cash Flow Instruments
Derivative instruments
Prepaid expenses and other	$	—	$	—	$	—	$	—	$	—	$	—
Other assets and deferred charges	28		179		307		12		207		293
Derivative asset subtotals	$	28	$	179	$	307	$	12	$	207	$	293
Accrued liabilities	$	—	$	—	$	1	$	—	$	—	$	1
Deferred income taxes and other	1		—		460		—		—		610
Derivative liability subtotals	$	1	$	—	$	461	$	—	$	—	$	611
Nonderivative hedging instruments
Long-term debt due within one year	$	—	$	756	$	—	$	—	$	766	$	—
Long-term debt	—		3,944		—		—		3,850		—
Nonderivative hedge liability subtotals	$	—	$	4,700	$	—	$	—	$	4,616	$	—