Income Taxes
3 Months Ended
Apr. 30, 2016
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
The net tax benefit of $1 million for the three months ended April 30, 2016 consisted of state and foreign tax expenses of $3 million and $2 million of expense related to the deferred tax asset change arising from the tax amortization of indefinite-lived intangible assets, offset by a $4 million benefit to adjust the valuation allowance and a $2 million benefit relating to other comprehensive income. In accordance with accounting standards, we are required to allocate a portion of our tax provision between operating losses and accumulated other comprehensive income. Application of this guidance required the recognition of an income tax benefit of $2 million in operating results, offset by a $2 million charge to other comprehensive income for the quarter.
As of April 30, 2016, we have approximately $2.6 billion of net operating losses (NOLs) available for U.S. federal income tax purposes, which expire in 2032 through 2034 and $62 million of tax credit carryforwards that expire at various dates through 2035. For these NOL and tax credit carryforwards a net deferred tax asset of $90 million has been recorded, net of a valuation allowance of $802 million. A valuation allowance of $236 million fully offsets the deferred tax assets resulting from the state NOL carryforwards that expire at various dates through 2034. In assessing the need for the valuation allowance, we considered both positive and negative evidence related to the likelihood of realization of the deferred tax assets. As a result of our periodic assessment, our estimate of the realization of deferred tax assets is solely based on the future reversals of existing taxable temporary differences and tax planning strategies that we would make use of to accelerate taxable income to utilize expiring NOL and tax credit carryforwards. Accordingly, in the first quarter of 2016, the valuation allowance was increased by $13 million to offset the net deferred tax assets created in the quarter relating primarily to the increase in NOL carryforwards.