Interest Expense

3 Months Ended

Mar. 31, 2013

Interest Income (Expense), Net [Abstract]

Interest Expense

Interest Expense

The following are the components of net interest expense:

	Three Months Ended March 31,
In millions	2013			2012
Interest expense	$	127		$	133
Interest income	(1		)	(1		)
Interest expense, net	$	126		$	132