Effect of New Accounting Standards
 3 Months Ended
Apr. 30, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]  
Effect of New Accounting Standards
Effect of New Accounting Standards
In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 will change how companies account for certain aspects of share-based payments to employees. Entities will be required to recognize the income tax effects of awards in the income statement when the awards vest or are settled (i.e., additional paid-in capital or APIC pools will be eliminated). The guidance on employers’ accounting for an employee’s use of shares to satisfy the employer’s statutory income tax withholding obligation and for forfeitures is changing. The ASU also provides a practical expedient for public companies that will allow the use of a simplified method to estimate the expected term for certain awards. The guidance is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the effect that adopting this new accounting guidance will have on our financial condition, results of operations or cash flows.
In March 2016, the FASB issued Accounting Standards Update (ASU) 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships (a consensus of the FASB Emerging Issues Task Force) (ASU 2016-05). The novation of a derivative contract (i.e., a change in the counterparty) in a hedge accounting relationship does not, in and of itself, require dedesignation of that hedge accounting relationship. The hedge accounting relationship could continue uninterrupted if all of the other hedge accounting criteria are met, including the expectation that the hedge will be highly effective when the creditworthiness of the new counterparty to the derivative contract is considered. The guidance is effective for fiscal years beginning after December 15, 2016, and interim periods therein. Early adoption is permitted. Entities may apply the guidance prospectively or on a modified retrospective basis. We are currently evaluating the effect that adopting this new accounting guidance will have on our financial condition, results of operations or cash flows.

In April 2015, the FASB issued Accounting Standards Update (ASU) 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03). ASU 2015-03 requires debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying value of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by ASU 2015-03. The amendments in this ASU are effective retrospectively for fiscal years, and interim periods within those years, beginning after December 15, 2015. Early adoption is permitted. The Company early adopted ASU 2015-03 retrospectively in its second quarter ended August 1, 2015. As a result of the retrospective adoption, the Company reclassified unamortized debt issuance costs of $89 million as of May 2, 2015, from Other assets to a reduction in Long-term debt on the unaudited Interim Consolidated Balance Sheets. Adoption of this standard did not impact results of operations, retained earnings, or cash flows in the current or previous interim and annual reporting periods.