Interest Expense (Notes)

9 Months Ended

Sep. 30, 2014

Interest Income (Expense), Net [Abstract]

Interest Expense

Interest Expense

The following are the components of net interest expense:

	Three Months Ended September 30,						Nine Months Ended September 30,
In millions	2014			2013			2014			2013
Interest expense	$	158		$	125		$	480		$	379
Interest income	(5		)	(3		)	(11		)	(5		)
Interest expense, net	$	153		$	122		$	469		$	374