Derivative Financial Instruments (Tables)

12 Months Ended

Jan. 31, 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 Consolidated Balance Sheets:

	January 31, 2015						January 31, 2014
(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	$	—	$	—	$	—	$	5	$	—	$	—
Other assets and deferred charges	12		207		293		—		97		619
Derivative asset subtotals	$	12	$	207	$	293	$	5	$	97	$	619
Accrued liabilities	$	—	$	—	$	1	$	—	$	—	$	1
Deferred income taxes and other	—		—		610		—		—		1
Derivative liability subtotals	$	—	$	—	$	611	$	—	$	—	$	2
Nonderivative hedging instruments
Long-term debt due within one year	$	—	$	766	$	—	$	—	$	973	$	—
Long-term debt	—		3,850		—		—		5,095		—
Nonderivative hedge liability subtotals	$	—	$	4,616	$	—	$	—	$	6,068	$	—