Accounts receivable

12 Months Ended

Dec. 31, 2013

Notes To Financial Statements [Abstract]

Accounts receivable

3 – Accounts receivable

In millions	December 31,	2013		2012
Freight		$	675	$	674
Non-freight			147		167
Gross accounts receivable			822		841
Allowance for doubtful accounts			(7)		(10)
Net accounts receivable		$	815	$	831