Investments in Unconsolidated Affiliates (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended																				12 Months Ended									12 Months Ended							12 Months Ended													12 Months Ended														12 Months Ended						1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 NGL Pipelines and Services [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member]	Dec. 31, 2010 NGL Pipelines and Services [Member]	Dec. 31, 2012 NGL Pipelines and Services [Member] Venice Energy Service Company LLC [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member] Venice Energy Service Company LLC [Member]	Dec. 31, 2012 NGL Pipelines and Services [Member] K/D/S Promix, LLC [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member] K/D/S Promix, LLC [Member]	Dec. 31, 2012 NGL Pipelines and Services [Member] Baton Rouge Fractionators LLC [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member] Baton Rouge Fractionators LLC [Member]	Dec. 31, 2012 NGL Pipelines and Services [Member] Skelly-Belvieu Pipeline Company, LLC [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member] Skelly-Belvieu Pipeline Company, LLC [Member]	Dec. 31, 2012 NGL Pipelines and Services [Member] Texas Express Pipeline LLC [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member] Texas Express Pipeline LLC [Member]	Dec. 31, 2012 NGL Pipelines and Services [Member] Texas Express Gathering LLC [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member] Texas Express Gathering LLC [Member]	Dec. 31, 2012 NGL Pipelines and Services [Member] Front Range Pipeline LLC [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member] Front Range Pipeline LLC [Member]	Dec. 31, 2012 Onshore Natural Gas Pipelines And Services [Member]	Dec. 31, 2011 Onshore Natural Gas Pipelines And Services [Member]	Dec. 31, 2010 Onshore Natural Gas Pipelines And Services [Member]	Dec. 31, 2012 Onshore Natural Gas Pipelines And Services [Member] Evangeline [Member]		Dec. 31, 2011 Onshore Natural Gas Pipelines And Services [Member] Evangeline [Member]		Dec. 31, 2012 Onshore Natural Gas Pipelines And Services [Member] White River Hub, LLC [Member]	Dec. 31, 2011 Onshore Natural Gas Pipelines And Services [Member] White River Hub, LLC [Member]	Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member]	Dec. 31, 2011 Onshore Crude Oil Pipelines and Services [Member]	Dec. 31, 2010 Onshore Crude Oil Pipelines and Services [Member]	Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company [Member]	Dec. 31, 2011 Onshore Crude Oil Pipelines and Services [Member] Seaway Crude Pipeline Company [Member]	Dec. 31, 2012 Onshore Crude Oil Pipelines and Services [Member] Eagle Ford Pipeline LLC [Member]	Dec. 31, 2011 Onshore Crude Oil Pipelines and Services [Member] Eagle Ford Pipeline LLC [Member]	Dec. 31, 2012 Offshore Pipelines And Services [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member]	Dec. 31, 2010 Offshore Pipelines And Services [Member]	Dec. 31, 2012 Offshore Pipelines And Services [Member] Poseidon Oil Pipeline Company, LLC [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member] Poseidon Oil Pipeline Company, LLC [Member]	Dec. 31, 2012 Offshore Pipelines And Services [Member] Cameron Highway Oil Pipeline Company [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member] Cameron Highway Oil Pipeline Company [Member]	Dec. 31, 2012 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member]	Dec. 31, 2012 Offshore Pipelines And Services [Member] Neptune Pipeline Company, LLC [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member] Neptune Pipeline Company, LLC [Member]	Dec. 31, 2012 Offshore Pipelines And Services [Member] Southeast Keathley Canyon Pipeline Company, LLC [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member] Southeast Keathley Canyon Pipeline Company, LLC [Member]	Dec. 31, 2012 Petrochemical and Refined Products Services [Member]		Dec. 31, 2011 Petrochemical and Refined Products Services [Member]		Dec. 31, 2010 Petrochemical and Refined Products Services [Member]		Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Baton Rouge Propylene Concentrator, LLC [Member]	Dec. 31, 2011 Petrochemical and Refined Products Services [Member] Baton Rouge Propylene Concentrator, LLC [Member]	Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Centennial Pipeline LLC [Member]	Dec. 31, 2011 Petrochemical and Refined Products Services [Member] Centennial Pipeline LLC [Member]	Dec. 31, 2012 Petrochemical and Refined Products Services [Member] Other Unconsolidated Affiliates [Member]		Dec. 31, 2011 Petrochemical and Refined Products Services [Member] Other Unconsolidated Affiliates [Member]		Dec. 31, 2012 Other Investment [Member]		Dec. 31, 2011 Other Investment [Member]		Dec. 31, 2010 Other Investment [Member]		Jan. 18, 2012 Other Investment [Member] Energy Transfer Equity [Member]	Apr. 27, 2012 Other Investment [Member] Energy Transfer Equity [Member]	Dec. 31, 2012 Other Investment [Member] Energy Transfer Equity [Member]		Dec. 31, 2011 Other Investment [Member] Energy Transfer Equity [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Interest (in hundredths)							13.10%		50.00%		32.20%		50.00%		35.00%		45.00%		33.30%					0.00%	[1]			50.00%					50.00%		50.00%					36.00%		50.00%		50.00%		25.70%		50.00%								30.00%		50.00%														0.00%	[2]	13.10%
Investments in unconsolidated affiliates	$ 1,394.6	$ 1,859.6					$ 29.6	$ 35.5	$ 46.9	$ 40.7	$ 20.2	$ 21.0	$ 38.2	$ 35.0	$ 144.4	$ 13.9	$ 20.9	$ 0	$ 24.4	$ 0				$ 0	[1]	$ 4.4	[1]	$ 24.9	$ 25.7				$ 341.4	$ 170.7	$ 152.4	$ 0				$ 47.3	$ 55.4	$ 220.0	$ 222.8	$ 90.0	$ 94.6	$ 46.8	$ 51.1	$ 74.9	$ 1.0							$ 8.5	$ 9.5	$ 60.8	$ 51.8	$ 3.0	[3]	$ 3.4	[3]									$ 0	[2]	$ 1,023.1	[2]
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract]
Equity in income of unconsolidated affiliates	64.3	46.4	62.0	15.9	21.8	17.7															4.4	5.5	4.6							32.6	(4.1)	6.7					26.9	27.1	44.8											(17.9)	[4]	(18.7)	[4]	(9.0)	[4]									2.4	[5]	14.8	[5]	(2.8)	[5]
Unamortized excess cost amounts by business segment [Abstract]
Unamortized excess cost amounts	63.7	1,180.6		28.9	24.7																									18.5	19.2						13.6	14.8												2.7		2.9												0	[6]	1,119.0	[6]
Equity method investment amortization of excess cost	3.4	34.5	40.2	1.0	1.0	0.9																								0.7	0.7	0.7					1.2	1.2	1.3											0.2		0.1		1.0										0.3	[7]	31.5	[7]	36.3	[7]
Forecasted amortization of excess cost amounts - 2013	3.3
Forecasted amortization of excess cost amounts - 2014	3.3
Forecasted amortization of excess cost amounts - 2015	3.3
Forecasted amortization of excess cost amounts - 2016	3.3
Forecasted amortization of excess cost amounts - 2017	3.3
Number of common units owned accounted for under equity method (in units)																																																																										29,303,514
Number of Energy Transfer Equity common units sold (in units)																																																																						22,762,636				9,672,576
Proceeds from the sale of Energy Transfer Equity common units																																																																						825.1				375.2
Gain on the sale of Energy Transfer Equity common units																																																																										27.2
Investment in equity securities - available-for-sale
Number of Energy Transfer Equity common units sold (in units)																																																																							6,540,878
Proceeds from the sale of available-for-sale securities																																																																							270.2
Gain on sales of Energy Transfer Equity common units																																																																								68.8
Summarized balance sheet information of unconsolidated affiliates:
Current assets	254.7	1,680.3
Property, plant and equipment, net	2,911.3	16,413.5
Other assets	3.2	4,893.7
Total assets	3,169.2	22,987.5
Current liabilities	276.3	1,955.7
Other liabilities	272.1	11,897.1
Combined equity	2,620.8	9,134.7
Total liabilities and combined equity	3,169.2	22,987.5
Summarized income statement information of unconsolidated affiliates [Abstract]
Revenues	670.1	9,119.9	7,437.0
Operating Income (Loss)	213.7	1,393.4	1,241.8
Net Income (Loss)	$ 174.9	$ 458.1	$ 386.8

[1] In June 2012, we acquired the remaining ownership interests in Evangeline Gas Pipeline Company, L.P. and Evangeline Gas Corp. (collectively "Evangeline") and they became wholly owned subsidiaries of ours.

[2] See "Other Investments" within this Note 9 for information regarding the sale of our ownership interests in Energy Transfer Equity.

[3] Other unconsolidated affiliates include a 50% interest in a propylene pipeline extending from Mont Belvieu, Texas to La Porte, Texas and a 25% interest in a company that provides logistics communications solutions between petroleum pipelines and their customers.

[4] Losses are primarily attributable to our investment in Centennial. As a result of a trend in declining earnings, we estimated the fair value of this equity-method investment during each of the last three fiscal years. Our estimates, based on a combination of the market and income approaches, indicate that the fair value of this investment remains substantially in excess of its carrying value.

[5] With respect to the year ended December 31, 2012, the amount presented reflects our equity in the income of Energy Transfer Equity from January 1, 2012 to January 18, 2012.

[6] On January 18, 2012, we discontinued using the equity method to account for our investment in Energy Transfer Equity common units and began accounting for this investment as an available-for-sale security. As a result, we no longer had any excess cost amounts associated with this investment. These excess cost amounts were attributable to various factors, including fixed assets, incentive distribution rights, amortizable intangible assets and equity method goodwill.

[7] Reflects amortization of excess cost amounts related to our investment in Energy Transfer Equity through January 18, 2012, which is the date we ceased using the equity method to account for this investment.