Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 11.0	$ 19.9
Accounts and notes receivable, net	167.5	174.7
Inventories	5.0	4.3
Deferred income taxes	6.6	6.6
Prepaid expenses and other assets	25.3	28.6
Total current assets	215.4	234.1
Investment in terminal joint venture	59.7	59.6
Property, at cost	1,782.9	1,770.8
Less accumulated depreciation and amortization	(1,023.9)	(1,008.3)
Property - net	759.0	762.5
Other Assets	115.1	118.1
Total	1,149.2	1,174.3
Current Liabilities:
Notes payable and current portion of long-term debt	17.4	16.4
Accounts payable	121.4	125.8
Payroll and vacation benefits	15.5	16.0
Uninsured claims	13.0	11.2
Accrued and other liabilities	18.5	24.0
Total current liabilities	185.8	193.4
Long-term Liabilities:
Long-term debt	283.7	302.7
Deferred income taxes	249.1	251.9
Employee benefit plans	108.3	108.0
Uninsured claims and other liabilities	38.2	38.4
Total long-term liabilities	679.3	701.0
Commitments and Contingencies (Note 4)
Shareholders' Equity:
Capital stock	32.0	31.9
Additional paid in capital	252.9	252.7
Accumulated other comprehensive loss	(44.2)	(45.5)
Retained earnings	43.4	40.8
Total shareholders' equity	284.1	279.9
Total	$ 1,149.2	$ 1,174.3