Income Taxes (Tables)

6 Months Ended

Jun. 30, 2015

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Income tax rate reconciliation from statutory to effective tax rate

	Three Months Ended June 30,				Six Months Ended June 30,
In millions	2015		2014		2015		2014
Income (loss) before income taxes	$	92	$	55	$	205	$	459
Provision (benefit) for income taxes	$	28	$	(65)	$	72	$	83
Effective tax rate		30.4%		-118.2%		35.1%		18.1%