Commitments and Contingencies - Narrative (Details)	1 Months Ended		12 Months Ended
	Apr. 30, 2014 mi	May 31, 2007 entity	Dec. 30, 2016 USD ($) mi
Operating Leased Assets [Line Items]
Maximum lease term (up to)			30 years
Percentage of locomotive fleet under long-term maintenance program			50.00%
Non-catastrophic property deductible			$ 25,000,000
Casualty and catastrophic property deductible			50,000,000
Minimum | Pending Litigation
Operating Leased Assets [Line Items]
Range of possible loss from legal proceedings			6,000,000
Maximum | Pending Litigation
Operating Leased Assets [Line Items]
Range of possible loss from legal proceedings			$ 126,000,000
Fuel Surcharge Antitrust Litigation
Operating Leased Assets [Line Items]
Number of other U.S.-based entities mentioned in class action lawsuit | entity		3
Environmental Litigation
Operating Leased Assets [Line Items]
Number of miles pertaining to Passaic River tidal reach required to be studied by EPA | mi			17
Number of miles under study | mi	8
Years to clean up site			10 years