Interest Expense (Tables)

6 Months Ended

Jun. 30, 2014

Interest Income (Expense), Net [Abstract]

Components of net interest expense

The following are the components of net interest expense:

	Three Months Ended June 30,						Six Months Ended June 30,
In millions	2014			2013			2014			2013
Interest expense	$	161		$	127		$	322		$	254
Interest income	(3		)	(1		)	(6		)	(2		)
Interest expense, net	$	158		$	126		$	316		$	252