Interest Expense (Tables)

3 Months Ended

Mar. 31, 2015

Interest Income (Expense), Net [Abstract]

Components of net interest expense

The following are the components of net interest expense:

	Three Months Ended March 31,
In millions	2015			2014
Interest expense	$	137		$	161
Interest income	(3		)	(3		)
Interest expense, net	$	134		$	158