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Segment Results (Details) (USD $) In Millions	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
Segment Results (Details) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Transportation: Ocean transportation [Member]	Jun. 30, 2010 Transportation: Ocean transportation [Member]	Jun. 30, 2011 Transportation: Ocean transportation [Member]	Jun. 30, 2010 Transportation: Ocean transportation [Member]	Jun. 30, 2011 Transportation: Logistics services [Member]	Jun. 30, 2010 Transportation: Logistics services [Member]	Jun. 30, 2011 Transportation: Logistics services [Member]	Jun. 30, 2010 Transportation: Logistics services [Member]	Jun. 30, 2011 Real Estate: Leasing [Member]	Jun. 30, 2010 Real Estate: Leasing [Member]	Jun. 30, 2011 Real Estate: Leasing [Member]	Jun. 30, 2010 Real Estate: Leasing [Member]	Mar. 31, 2011 Real Estate: Sales [Member]	Jun. 30, 2010 Real Estate: Sales [Member]	Jun. 30, 2011 Real Estate: Sales [Member]	Jun. 30, 2010 Real Estate: Sales [Member]	Jun. 30, 2011 Less: Real Estate discontinued operations [Member]	Jun. 30, 2010 Less: Real Estate discontinued operations [Member]	Jun. 30, 2011 Less: Real Estate discontinued operations [Member]	Jun. 30, 2010 Less: Real Estate discontinued operations [Member]	Jun. 30, 2011 Agribusiness [Member]	Jun. 30, 2010 Agribusiness [Member]	Jun. 30, 2011 Agribusiness [Member]	Jun. 30, 2010 Agribusiness [Member]	Jun. 30, 2011 Reconciling Items [Member]	Jun. 30, 2010 Reconciling Items [Member]	Jun. 30, 2011 Reconciling Items [Member]	Jun. 30, 2010 Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total revenue	$ 488.2	$ 396.8	$ 893.2	$ 739.3	$ 314.2	$ 257.2	$ 583.8	$ 486.7	$ 103.1	$ 88.6	$ 194.4	$ 165.7	$ 25.2	$ 23.2	$ 51.2	$ 46.8	$ 30.7	$ 22.0	$ 54.1	$ 82.3	$ (22.8)	$ (20.4)	$ (37.7)	$ (78.5)	$ 44.7	$ 29.8	$ 60.8	$ 44.0	$ (6.9)	$ (3.6)	$ (13.4)	$ (7.7)
Total operating profit	32.0	46.4	44.3	65.5	9.4	37.0	2.0	47.4	2.1	1.5	3.6	3.4	10.4	8.5	21.0	17.6	10.6	8.0	22.6	29.4	(9.0)	(10.4)	(16.0)	(33.0)	8.5	1.8	11.1	0.7
Interest expense	(6.1)	(6.5)	(12.3)	(13.0)
General Corporate Expenses	(4.2)	(4.5)	(8.4)	(11.1)
Income From Continuing Operations Before Income Taxes	21.7	35.4	23.6	41.4
Income Tax Expense	8.5	13.2	9.4	16.3
Income From Continuing Operations	13.2	22.2	14.2	25.1
Income From Discontinued Operations (net of income taxes)	5.5	6.7	9.7	21.1
Net Income	$ 18.7	$ 28.9	$ 23.9	$ 46.2