Interest Expense

9 Months Ended

Sep. 30, 2016

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	2016			2015			2016			2015
Interest expense	$	258		$	268		$	830		$	577
Interest income	(5		)	(7		)	(14		)	(15		)
Interest expense, net	$	253		$	261		$	816		$	562