Income Taxes

The Company's income tax provisions attributable to income from continuing operations consisted of the following for the three and nine months ended September 30, 2014 and 2013:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014		2013
	(in millions)
Current tax provision (benefit)	$	(14	)	$	(9	)	$	4	$	5
Deferred tax provision	250			57			315		276
Income tax provision	$	236		$	48		$	319	$	281

For the three and nine months ended September 30, 2014, the Company's effective tax rates, excluding income attributable to the noncontrolling interest, were 36 percent and 34 percent, respectively, as compared to effective rates of 40 percent and 37 percent for each of the same respective periods in 2013. The Company's 2014 effective tax rates differed from the U.S. statutory rate of 35 percent primarily due to state income tax apportionments, nondeductible expenses and, for the nine months ended September 30, 2014, the recognition of a $21 million tax benefit resulting from the resolution during the first quarter of 2014 of the tax uncertainty related to net operating loss carryovers and alternative minimum tax credits obtained from the 2012 acquisition of Premier Silica. There are no unrecognized tax benefits as of September 30, 2014.

The Company files income tax returns in the U.S. federal and various state and foreign jurisdictions. The Internal Revenue Service has closed examinations of the 2012 and prior tax years and, with few exceptions, the Company believes that it is no longer subject to examinations by state and foreign tax authorities for years before 2009. As of September 30, 2014, no adjustments had been proposed in any jurisdiction that would have a significant effect on the Company's liquidity, future results of operations or financial position.