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Derivative Financial Instruments (Tables) | 3 Months Ended
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Apr. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Contracts - Effect on Results of Operations | Periodic payments, valuation adjustments, and amortization of gains or losses on our derivative contracts had the following effect on our Consolidated Statements of Operations:
Derivative Contracts - Effect on Results of Operations (millions) | Three Months Ended
Type of Contract |  | Classification of (Income)/Expense | April 30, 2016 |  |  | May 2, 2015 |
Interest rate swaps |  | Net interest expense | $ | (8 | ) |  | $ | (9 | )

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 + Details
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