Income Taxes (Tables)

9 Months Ended

Sep. 30, 2013

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	2013		2012		2013		2012
Income (loss) before income taxes	$	171	$	(57)	$	122	$	759
Provision (benefit) for income taxes	$	39	$	(64)	$	4	$	161
Effective tax rate		22.8%		112.3%		3.3%		21.2%

Change in unrecognized tax benefit

In millions
Unrecognized tax benefit as of December 31, 2012		$	47
The gross amount of the increase/(decrease) in the UTB as a result of tax positions taken:
	During a prior year		0
	During the current year		11
The amounts of decreases in the UTB related to settlements with taxing authorities			0
The reduction in the UTB as a result of the applicable statute of limitations			0
Unrecognized tax benefit as of September 30, 2013		$	58