Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Revenue:
Total Operating Revenue	$ 513.9	$ 532.4
Costs and Expenses:
Operating costs	(448.3)	(467.1)
Income from SSAT	4.0	8.5
Selling, general and administrative	(56.6)	(56.3)
Total Costs and Expenses	(500.9)	(514.9)
Operating Income	13.0	17.5
Interest expense	(8.6)	(4.6)
Other income (expense), net	0.6	0.6
Income before Income Taxes	5.0	13.5
Income taxes	(1.2)	(1.0)
Net Income	3.8	12.5
Other Comprehensive Income (Loss), Net of Income Taxes:
Net Income	3.8	12.5
Other Comprehensive Income (Loss):
Amortization of prior service cost	(1.2)	(1.1)
Amortization of net loss	1.3	0.9
Other adjustments	(0.7)
Total Other Comprehensive (Loss) Income	(0.6)	(0.2)
Comprehensive Income	$ 3.2	$ 12.3
Basic Earnings Per-Share: (in dollars per share)	$ 0.09	$ 0.29
Diluted Earnings Per-Share: (in dollars per share)	$ 0.09	$ 0.29
Weighted Average Number of Shares Outstanding:
Basic (in shares)	43.0	42.8
Diluted (in shares)	43.3	43.1
Ocean Transportation
Operating Revenue:
Total Operating Revenue	$ 400.9	$ 397.9
Logistics
Operating Revenue:
Total Operating Revenue	$ 113.0	$ 134.5