Accounts receivable

12 Months Ended

Dec. 31, 2014

Notes To Financial Statements [Abstract]

Accounts receivable

6 – Accounts receivable

In millions	December 31,	2014		2013
Freight		$	777	$	675
Non-freight			160		147
Gross accounts receivable			937		822
Allowance for doubtful accounts			(9)		(7)
Net accounts receivable		$	928	$	815