Income Taxes (Tables)

6 Months Ended

Jun. 30, 2013

Text Block [Abstract]

Income Tax Rate Reconciliation From Statutory To Effective Tax Rate

	Three Months Ended June 30,				Six Months Ended June 30,
In millions	2013		2012		2013		2012
Income (loss) before income taxes	$	(264)	$	795	$	(49)	$	816
Provision (benefit) for income taxes	$	(86)	$	214	$	(35)	$	225
Effective tax rate		32.6%		26.9%		71.4%		27.6%

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 June 30, 2013		$	58