Changes in Operations United States RCP&E (Details) (RCP&E [Member], USD $)	0 Months Ended
	May 31, 2014 employee carload mile	May 30, 2014 carload mile
Cash purchase price	$ 217,700,000
Track miles		670
Carloads shipped annually		52,000
Number of employees	180
Preliminary allocation of fair values [Member]
Purchase Price Allocations [Abstract]
Materials and supplies		2,572,000
Prepaid expenses and other		116,000
Property and equipment		215,116,000
Total assets		217,804,000
Accounts payable and accrued expenses		108,000
Net assets		$ 217,696,000