Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2007 entity	Mar. 28, 2014 mi company	Dec. 31, 2005 mi company
Insurance
Non-catastrophic property deductible		$ 25
Casualty and catastrophic property deductible		50
Legal
Range of possible loss for certain legal proceedings, minimum		3
Range of possible loss for certain legal proceedings, maximum		$ 14
Class action lawsuits filed against U.S.-based Class I railroads, excluding CSXT (number of entities)	3
Additional companies named in suit			5
Number of miles of Passaic River to be studied by EPA		17	17
Number of other parties conducting a Remedial Investigation and Feasibility Study		70