Income Taxes

The Company's income tax benefit (provision) attributable to income from continuing operations consisted of the following for the three and six months ended June 30, 2015 and 2014:



	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
	(in millions)
Current tax provision	$	(1	)	$	(6	)	$	(1	)	$	(18	)
Deferred tax benefit (provision)	124			(26		)	161			(65		)
Income tax benefit (provision)	$	123		$	(32	)	$	160		$	(83	)

For the three and six months ended June 30, 2015, the Company's effective tax rates, excluding income attributable to noncontrolling interests, were 36 percent and 35 percent, as compared to effective rates of 37 percent and 29 percent for the same respective periods in 2014. The Company's 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 six months ended June 30, 2014, the recognition of a $21 million tax benefit resulting from the resolution during the first quarter of 2014 of a tax uncertainty related to net operating loss carryovers and alternative minimum tax credits obtained from the 2012 acquisition of Premier Silica. The Company has no unrecognized tax benefits as of June 30, 2015.

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 June 30, 2015, 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.