Changes in Operations U.K/Europe Pentalver (Details) £ in Millions, $ in Millions			12 Months Ended
	Dec. 12, 2016 GBP (£) a employee seaport	Dec. 12, 2016 USD ($) a employee seaport	Dec. 31, 2016 employee
Entity Number of Employees			7,300
Pentalver Transport Limited [Member]
Business Acquisition, Date of Acquisition Agreement			Dec. 12, 2016
Cash consideration	£ 87	$ 107
Number of Major Seaports | seaport	4	4
Number of trucks	150	150
Entity Number of Employees	600	600
Pentalver Transport Limited [Member] | Minimum [Member]
Acres of Land Owned | a	100	100
Freightliner [Member]
Number of trucks	250	250