Segment Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Revenue	$ 405.0	$ 373.3
Operating Profit	19.6	24.8
Interest expense	(6.1)	(6.2)
General Corporate Expenses	(5.6)	(4.2)
Separation Costs	(3.3)	0
Income Before Taxes	4.6	14.4
Income tax expense	1.8	5.3
Income From Continuing Operations	2.8	9.1
Income From Discontinued Operations (net of income taxes)	1.0	(3.9)
Net Income	3.8	5.2
Ocean transportation segment [Member]
Segment Reporting Information [Line Items]
Revenue	279.7	238.4
Operating Profit	8.1	5.4
Logistics services segment [Member]
Segment Reporting Information [Line Items]
Revenue	86.6	91.3
Operating Profit	0.3	1.5
Less amounts reported in discontinued operations [Member]
Segment Reporting Information [Line Items]
Revenue	(9.0)	(15.4)
Operating Profit	(3.9)	(7.3)
Sales segment [Member]
Segment Reporting Information [Line Items]
Revenue	11.5	23.4
Operating Profit	0.9	12.0
Leasing segment [Member]
Segment Reporting Information [Line Items]
Revenue	25.6	26.0
Operating Profit	10.7	10.6
Agribusiness [Member]
Segment Reporting Information [Line Items]
Revenue	14.0	16.1
Operating Profit	3.5	2.6
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Revenue	$ (3.4)	$ (6.5)