Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating Revenue:
Ocean transportation	$ 278.8	$ 237.5
Logistic services	86.6	91.3
Real estate sales	2.5	5.5
Real estate leasing	24.2	23.8
Agribusiness	12.9	15.2
Total operating revenue	405.0	373.3
Operating Costs and Expenses:
Cost of ocean transportation services	248.4	209.6
Cost of logistic services	77.6	81.1
Cost of real estate sales and leasing	15.4	17.7
Costs of agribusiness goods and services	9.1	12.3
Selling, general and administrative	39.0	37.7
Separation costs	3.3	0
Operating costs and expenses	392.8	358.4
Operating Income	12.2	14.9
Other Income and (Expense):
Income (loss) related to real estate joint ventures	(1.6)	5.7
Interest income	0.1	0
Interest expense	(6.1)	(6.2)
Income Before Taxes	4.6	14.4
Income tax expense	1.8	5.3
Income From Continuing Operations	2.8	9.1
Income (Loss) From Discontinued Operations (net of income taxes)	1.0	(3.9)
Net Income	3.8	5.2
Other Comprehensive Income, Net of Tax:
Net Income	3.8	5.2
Defined benefit pension plans:
Less: amortization of prior service cost included in net periodic pension cost	(0.2)	(0.2)
Less: amortization of net loss included in net periodic pension cost	(1.5)	(1.3)
Other Comprehensive Income	(1.7)	(1.5)
Comprehensive Income	$ 2.1	$ 3.7
Basic Earnings Per Share:
Continuing operations (in dollars per share)	$ 0.07	$ 0.22
Discontinued operations (in dollars per share)	$ 0.02	$ (0.10)
Net income (in dollars per share)	$ 0.09	$ 0.12
Diluted Earnings Per Share:
Continuing operations (in dollars per share)	$ 0.07	$ 0.22
Discontinued operations (in dollars per share)	$ 0.02	$ (0.10)
Net income (in dollars per share)	$ 0.09	$ 0.12
Weighted Average Number of Shares Outstanding:
Basic (in shares)	41.9	41.5
Diluted (in shares)	42.3	41.8
Cash Dividends Per Share (in dollars per share)	$ 0.315	$ 0.315