The Company (Details)		12 Months Ended
	Dec. 31, 2012 Successor [Member]	Dec. 31, 2012 Successor [Member] Consumer Products [Member]	Dec. 31, 2012 Successor [Member] Industrial Products [Member]	Dec. 31, 2012 Successor [Member] Coal [Member]	Dec. 31, 2012 Successor [Member] Agricultural Products [Member]	Feb. 12, 2010 Northern Sante Fe Corporation [Member]
Nature Of Operations [Line Items]
Rail Route Network Distance	32,500
Number of States in which Entity Operates	28
Number of Canadian Provinces In Which Entity Operates	2
Percentage of Total Freight Revenues		33.00%	25.00%	24.00%	18.00%
Business Combination, Step Acquisition, Remaining Equity Interest Acquired, Percentage						100.00%