Consolidated Statements of Cash Flows (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net income	$ 235.9	$ 124.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	139.1	138.8
Deferred income taxes	120.2	77.0
Equity in net earnings of unconsolidated affiliates	(13.6)	(16.2)
Share-based compensation	6.4	6.1
Excess tax benefit from share-based compensation	0	(15.7)
Deferred compensation	18.5	5.9
Distributions from unconsolidated affiliates	9.1	15.5
Gain on insurance recoveries related to hurricane damage	(25.6)	0
Cash payments related to hurricane damage	(1.9)	0
Insurance proceeds related to hurricane damage	36.6	0
Gain on sale of assets	(0.5)	(1.6)
Debt retirement costs	14.2	49.3
Changes in working capital items:
Accounts receivable	(37.4)	(34.1)
Materials and supplies	(11.8)	0.8
Other current assets	(0.1)	7.7
Accounts payable and accrued liabilities	12.3	54.5
Other, net	(36.3)	(52.5)
Net cash provided by operating activities	465.1	359.9
Investing activities:
Capital expenditures	(284.0)	(200.3)
Acquisition of an intermodal facility, net of cash acquired	0	(25.0)
Property investments in MSLLC	(29.0)	(18.2)
Insurance proceeds related to hurricane damage	12.4	0
Proceeds from disposal of property	6.8	6.2
Other, net	1.6	11.6
Net cash used for investing activities	(292.2)	(225.7)
Financing activities:
Proceeds from issuance of long-term debt	500.0	300.7
Repayment of long-term debt	(521.9)	(662.0)
Proceeds from common stock issuance	0	214.9
Debt costs	(18.2)	(44.8)
Proceeds from employee stock plans	1.8	0.8
Excess tax benefit from share-based compensation	0	15.7
Preferred stock dividends paid	(2.9)	(8.2)
Net cash used for financing activities	(41.2)	(182.9)
Cash and cash equivalents:
Net increase (decrease) during each period	131.7	(48.7)
At beginning of year	85.4	117.5
At end of period	$ 217.1	$ 68.8