Interest Expense (Notes)

9 Months Ended

Sep. 30, 2015

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	2015			2014			2015			2014
Interest expense	$	268		$	158		$	577		$	480
Interest income	(7		)	(5		)	(15		)	(11		)
Interest expense, net	$	261		$	153		$	562		$	469