|3 Months Ended|
Apr. 29, 2017
|Income Tax Disclosure [Abstract]|
The net tax benefit of $12 million for the three months ended April 29, 2017 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 $16 million benefit relating to other comprehensive income and net tax benefits of $1 million resulting from state audit settlements.
As of April 29, 2017, we have approximately $2.1 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. A federal valuation allowance of $816 million fully offsets the deferred tax assets resulting from the NOL and tax credit carryforwards that expire at various dates through 2034. A valuation allowance of $241 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 2017, the valuation allowance was increased by $64 million to offset the net deferred tax assets created in the quarter relating primarily to the increase in NOL carryforwards.
The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.
Reference 1: http://www.xbrl.org/2003/role/presentationRef