Investments in Unconsolidated Affiliates (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								3 Months Ended													3 Months Ended								3 Months Ended					3 Months Ended													3 Months Ended											3 Months Ended						1 Months Ended	2 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011		Mar. 31, 2012 Energy Transfer Equity [Member]		Mar. 31, 2012 NGL Pipelines and Services [Member]	Mar. 31, 2011 NGL Pipelines and Services [Member]	Dec. 31, 2011 NGL Pipelines and Services [Member]	Mar. 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]	Mar. 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]	Mar. 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]	Mar. 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]	Mar. 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]	Mar. 31, 2012 Onshore Natural Gas Pipelines And Services [Member]	Mar. 31, 2011 Onshore Natural Gas Pipelines And Services [Member]	Mar. 31, 2012 Onshore Natural Gas Pipelines And Services [Member] Evangeline [Member]		Dec. 31, 2011 Onshore Natural Gas Pipelines And Services [Member] Evangeline [Member]		Mar. 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]	Mar. 31, 2012 Onshore Crude Oil Pipelines and Services [Member]	Mar. 31, 2011 Onshore Crude Oil Pipelines and Services [Member]	Dec. 31, 2011 Onshore Crude Oil Pipelines and Services [Member]	Mar. 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]	Mar. 31, 2012 Offshore Pipelines And Services [Member]	Mar. 31, 2011 Offshore Pipelines And Services [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member]	Mar. 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]	Mar. 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]	Mar. 31, 2012 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member]	Dec. 31, 2011 Offshore Pipelines And Services [Member] Deepwater Gateway LLC [Member]	Mar. 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]	Mar. 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]	Mar. 31, 2012 Petrochemical and Refined Products Services [Member]	Mar. 31, 2011 Petrochemical and Refined Products Services [Member]	Dec. 31, 2011 Petrochemical and Refined Products Services [Member]	Mar. 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]	Mar. 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]	Mar. 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]		Mar. 31, 2012 Other Investment [Member]		Mar. 31, 2011 Other Investment [Member]		Dec. 31, 2011 Other Investment [Member]		Jan. 31, 2012 Other Investment [Member] Energy Transfer Equity [Member]	Mar. 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%		45.00%				49.50%	[1]			50.00%					50.00%					36.00%		50.00%		50.00%		25.70%		50.00%					30.00%		50.00%
Ownership interest (in hundredths)							1.30%	[2]
Investments in unconsolidated affiliates	$ 895.3				$ 1,859.6							$ 34.8	$ 35.5	$ 41.6	$ 40.7	$ 20.9	$ 21.0	$ 39.6	$ 35.0	$ 49.8	$ 13.9			$ 3.9	[1]	$ 4.4	[1]	$ 25.4	$ 25.7				$ 164.6	$ 170.7				$ 52.7	$ 55.4	$ 220.8	$ 222.8	$ 93.8	$ 94.6	$ 50.0	$ 51.1	$ 33.7	$ 1.0				$ 9.0	$ 9.5	$ 51.4	$ 51.8	$ 3.3	[3]	$ 3.4	[3]								$ 0	[2]	$ 1,023.1	[2]
Number of common units owned accounted for under equity method (in units)																																																																				29,303,514
Total Energy Transfer Equity common units sold (in shares)																																																																	22,762,636
Cash received from the sale of Energy Transfer Equity common units																																																																	825.1
Gain on the sale of Energy Transfer Equity common units																																																																	27.5
Investment in equity securities - available-for-sale
Number of Energy Transfer Equity common units sold (in units)																																																																		3,569,232
Proceeds from the sale of available-for-sale securities																																																																		150.8
Gain on the sale of available-for sale securities	53.3	[4]	0	[4]																																																														25.8
Number of Energy Transfer Equity common units owned accounted for as available-for-sale securities (in units)																																																																		2,971,646
Investment in equity securities - available-for-sale	119.8
Unrealized gain on investment in available-for-sale equity securities	15.8	[5]			0	[5]
Equity in income (loss) of unconsolidated affiliates by business segment [Abstract]
Equity in income of unconsolidated affiliates	9.9		16.2						5.2	5.9												1.4	1.2							0.5	(0.5)				6.9	8.3												(6.5)	(5.0)										2.4	[6]	6.3	[6]
Unamortized excess cost amounts by business segment [Abstract]
Unamortized excess cost amounts	60.8				1,180.6				24.5		24.7																			19.0		19.2			14.5		14.8											2.8		2.9									0	[7]			1,119.0	[7]
Equity method investment tangible and intangible asset amortization expense	1.1		9.9						0.2	0.3																				0.2	0.2				0.3	0.3												0.1	0										0.3	[8]	9.1	[8]
Summarized income statement information of unconsolidated affiliates [Abstract]
Revenues									110.9	100.1												30.9	35.5							12.3	11.2				41.1	46.3												5.4	10.1										0	[9]	1,989.1	[9]
Operating Income (Loss)									27.0	23.4												2.6	2.6							0.8	0.5				19.1	18.9												(9.4)	(7.0)										0	[9]	364.2	[9]
Net Income (Loss)									$ 27.0	$ 23.4												$ 2.6	$ 2.6							$ 0.8	$ 0.5				$ 18.4	$ 18.7												$ (11.4)	$ (9.2)										$ 0	[9]	$ 88.6	[9]

[1] Evangeline refers to our ownership interests in Evangeline Gas Pipeline Company, L.P. and Evangeline Gas Corp., collectively.

[2] Effective January 18, 2012, our investment in Energy Transfer Equity common units is no longer accounted for using the equity method (see below).

[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] Represents gains on the sale of Energy Transfer Equity common units. See Note 7 for information regarding our investment in Energy Transfer Equity.

[5] Relates to our investment in Energy Transfer Equity common units, which is accounted for as available-for-sale at March 31, 2012. This investment was accounted for using the equity method at December 31, 2011 through January 18, 2012.

[6] With respect to the first quarter of 2012, amount presented reflects our estimated equity in the income of Energy Transfer Equity from January 1, 2012 to January 18, 2012.

[7] 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 them as available-for-sale equity securities. As a result, we no longer have any excess cost amounts associated with this investment.

[8] Reflects amortization of excess cost amounts related to our investment in Energy Transfer Equity through January 18, 2012. We ceased using the equity method to account for this investment on January 18, 2012.

[9] On January 18, 2012, we discontinued using the equity method to account for our investment in Energy Transfer Equity common units. As such, income statement data for Energy Transfer Equity is not presented for the three months ended March 31, 2012. For the three months ended March 31, 2011, net income for Energy Transfer Equity represents net income attributable to their partners.