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Property, Plant and Equipment, Significant Sales (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended				1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Seminole Pipeline segment [Member]	Mar. 31, 2013 Seminole Pipeline segment [Member]		Mar. 31, 2012 Seminole Pipeline segment [Member]		Jan. 31, 2013 Chemical Trucking Assets [Member]	Mar. 31, 2013 Chemical Trucking Assets [Member]		Mar. 31, 2012 Chemical Trucking Assets [Member]
Significant Acquisitions and Disposals [Line Items]
Proceeds from asset sales and insurance recoveries	$ 130.5	$ 998.2	$ 86.9	$ 86.9		$ 0		$ 29.5	$ 29.5		$ 0
Gains (losses) attributable to asset sales and insurance recoveries	$ 63.9	$ 55.8	$ 52.5	$ 52.5	[1]	$ 0	[1]	$ (0.5)	$ (0.5)	[1]	$ 0	[1]
[1] These amounts are a component of "Operating costs and expenses" as presented on our Unaudited Condensed Statements of Consolidated Operations.

X

- Definition

The gains (losses) included in earnings resulting from the sale or disposal of tangible assets. This item does not include any gain (loss) recognized on the sale of oil and gas property or timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 3

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 16

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6516133



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-Publisher FASB

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-Number 95

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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