Segment Results (unaudited)(Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Total revenue	$ 440.2	$ 437.3	$ 1,262.1	$ 1,176.0
Total operating profit	40.1	55.2	114.5	120.4
Interest Expense	(6.3)	(6.3)	(18.6)	(19.3)
General Corporate Expenses	(4.8)	(7.7)	(13.2)	(18.8)
Income Before Taxes	29.0	41.2	82.7	82.3
Income Tax Expense	10.7	15.6	31.6	31.8
Income From Continuing Operations	18.3	25.6	51.1	50.5
Income (Losses) From Discontinued Operations (net of taxes)	(9.6)	0.1	(18.5)	21.4
Net Income	8.7	25.7	32.6	71.9
Transportation: Ocean transportation [Member]
Segment Reporting Information [Line Items]
Total revenue	303.8	267.5	887.6	754.2
Total operating profit	6.2	40.4	8.2	87.8
Transportation: Logistics services [Member]
Segment Reporting Information [Line Items]
Total revenue	99.2	92.4	293.6	258.1
Total operating profit	2.0	1.8	5.6	5.2
Amounts reported in Transportation discontinued operations [Member]
Segment Reporting Information [Line Items]
Total revenue	(22.0)	(5.7)	(92.6)	(5.7)
Total operating profit	22.4	2.1	52.9	2.1
Real Estate: Leasing [Member]
Segment Reporting Information [Line Items]
Total revenue	24.5	24.4	75.7	71.2
Total operating profit	9.2	9.3	30.2	26.9
Real Estate: Sales [Member]
Segment Reporting Information [Line Items]
Total revenue	9.3	4.3	63.4	86.6
Total operating profit	3.5	2.9	26.1	32.3
Amounts reported in Real Estate discontinued operations [Member]
Segment Reporting Information [Line Items]
Total revenue	(8.8)	(3.3)	(47.2)	(82.3)
Total operating profit	(7.0)	(2.1)	(23.4)	(35.4)
Agribusiness [Member]
Segment Reporting Information [Line Items]
Total revenue	38.5	60.4	99.3	104.4
Total operating profit	3.8	0.8	14.9	1.5
Reconciling Items [Member]
Segment Reporting Information [Line Items]
Total revenue	$ (4.3)	$ (2.7)	$ (17.7)	$ (10.5)