QUARTERLY INFORMATION (Unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2010		Sep. 30, 2010		Jun. 30, 2010		Mar. 31, 2010		Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Quarterly information [Abstract]
Total Revenue	$ 460.2		$ 440.2		$ 448.5		$ 373.5		$ 437.6		$ 437.3		$ 396.5		$ 342.1		$ 1,722.0		$ 1,614.0		$ 1,392.0
Total operating profit	17.8		40.1		49.5		24.9		42.6		55.2		46.2		18.9		114.0		126.0		34.0
Interest expense	(6.2)		(6.3)		(6.1)		(6.2)		(6.2)		(6.3)		(6.5)		(6.5)		(25.0)		(26.0)		(25.0)
General corporate expenses	(7.1)		(4.8)		(4.2)		(4.2)		(4.5)		(7.7)		(4.5)		(6.6)		(20.3)		(23.3)		(21.8)
Income From Continuing Operations Before Income Taxes	4.5		29.0		39.2		14.5		31.9		41.2		35.2		5.8		87.0		114.0		12.0
Income taxes	0.8		10.6		15.1		5.8		13.1		15.5		13.1		3.0		32.0		45.0		5.0
Income From Continuing Operations	3.7		18.4		24.1		8.7		18.8		25.7		22.1		2.8		55.0		69.0		7.0
Discontinued operations	(2.1)	[1]	(9.7)	[1]	(5.4)	[1]	(3.5)	[1]	1.4		0		6.8		14.5		(21.0)		23.0		37.0
Net Income	1.6		8.7		18.7		5.2		20.2		25.7		28.9		17.3		34.0		92.0		44.0
Earnings per share [Abstract]
Basic (in dollars per share)	$ 0.04		$ 0.21		$ 0.45		$ 0.13		$ 0.49		$ 0.62		$ 0.70		$ 0.42		$ 0.82		$ 2.23		$ 1.08
Diluted (in dollars per share)	$ 0.04		$ 0.21		$ 0.44		$ 0.12		$ 0.48		$ 0.62		$ 0.70		$ 0.42		$ 0.81		$ 2.22		$ 1.08
Less amounts reported in discontinued operations [Member]
Quarterly information [Abstract]
Total Revenue	(0.4)	[1]	(8.8)	[1]	(23.1)	[1]	(15.2)	[1]	(44.3)	[1]	(3.3)	[1]	(20.7)	[1]	(58.4)	[1]	(47.5)	[2]	(126.7)	[2]	(136.6)	[2]
Total operating profit	(0.4)	[1]	(7.0)	[1]	(9.2)	[1]	(7.2)	[1]	(19.0)	[1]	(2.1)	[1]	(10.6)	[1]	(22.8)	[1]
Reconciling Items [Member]
Quarterly information [Abstract]
Total Revenue	(4.4)	[3]	(4.3)	[3]	(6.9)	[3]	(6.5)	[3]	(15.8)	[3]	(2.7)	[3]	(3.6)	[3]	(4.2)	[3]	(22.1)	[3]	(26.3)	[3]	(16.3)	[3]
Transportation Industry [Member] | Ocean transportation segment [Member]
Quarterly information [Abstract]
Total Revenue	282.6		281.8		274.8		238.4		268.0		261.8		257.2		229.5		1,077.0		1,016.0		888.6
Total operating profit	13.0		28.6		27.1		5.4		28.8		42.5		37.0		10.4
Earnings per share [Abstract]
Start-up losses from China string																			19.3
Transportation Industry [Member] | Logistics services segment [Member]
Quarterly information [Abstract]
Total Revenue	92.8		99.2		103.1		91.3		97.5		92.4		88.6		77.1		386.4		355.6		320.9
Total operating profit	(0.6)		2.0		2.1		1.5		2.0		1.8		1.5		1.9
Real Estate Industry [Member] | Leasing segment [Member]
Quarterly information [Abstract]
Total Revenue	24.4		24.5		25.2		26.0		23.2		24.4		23.2		23.6		100.1		94.4		103.2
Total operating profit	9.1		9.2		10.4		10.6		8.4		9.3		8.5		9.1
Real Estate Industry [Member] | Sales segment [Member]
Quarterly information [Abstract]
Total Revenue	2.8		9.3		30.7		23.4		49.5		4.3		22.0		60.3		66.2		136.1		125.6
Total operating profit	(10.6)		3.5		10.6		12.0		17.8		2.9		8.0		21.4
Agribusiness Industry [Member]
Quarterly information [Abstract]
Total Revenue	62.4		38.5		44.7		16.1		59.5	[4]	60.4	[4]	29.8	[4]	14.2	[4]	161.7	[5]	163.9	[5]	107.0	[5]
Total operating profit	7.3		3.8		8.5		2.6		4.6	[4]	0.8	[4]	1.8	[4]	(1.1)	[4]
Earnings per share [Abstract]
Gain from crop disaster relief payment									$ 4.9										$ 4.9

[1] See Note 2 for discussion of discontinued operations.

[2] Prior year amounts restated for amounts treated as discontinued operations.

[3] Includes inter-segment revenue, interest income, and other income classified as revenue for segment reporting purposes.

[4] Includes a $4.9 million gain in the fourth quarter of 2010 related to a crop disaster relief payment for drought experienced in prior years.

[5] Includes a $4.9 million gain in 2010 related to a crop disaster relief payment for drought experienced in prior years and a $5.4 million gain recorded upon consolidation of HS&TC in 2009.