Income Taxes (Tables)

9 Months Ended

Sep. 30, 2016

Text Block [Abstract]

Income tax rate reconciliation from statutory to effective tax rate

	Three Months Ended September 30,				Nine Months Ended September 30,
In millions	2016		2015		2016		2015
Income (loss) before income taxes	$	55	$	(55)	$	(101)	$	150
Provision (benefit) for income taxes	$	24	$	(20)	$	(28)	$	52
Effective tax rate		43.6%		36.4%		27.7%		34.7%