Business Segments, Segment Reporting Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Information by business segment [Abstract]
Revenues from third parties	$ 47,879.7		$ 47,661.1		$ 42,509.8
Revenues from related parties	71.5		65.9		73.3
Intersegment and intrasegment revenues	0		0		0
Total revenues	47,951.2		47,727.0		42,583.1
Equity in income (loss) of unconsolidated affiliates	259.5		167.3		64.3
Gross operating margin	5,286.5		4,818.1		4,387.0
Property, plant and equipment, net (see Note 8)	29,881.6		26,946.6		24,846.4
Investments in unconsolidated affiliates (see Note 9)	3,042.0		2,437.1		1,394.6
Intangible assets, net: (see Note 11)	4,302.1		1,462.2		1,566.8
Goodwill: (see Note 11)	4,199.9		2,080.0		2,086.8		2,092.3
Segment assets	41,425.6		32,925.9		29,894.6
NGL Pipelines and Services [Member]
Information by business segment [Abstract]
Equity in income (loss) of unconsolidated affiliates	30.6		15.7		15.9
Intangible assets, net: (see Note 11)	689.2		285.2
Goodwill: (see Note 11)	2,180.4		341.2		341.2		341.2
Onshore Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Equity in income (loss) of unconsolidated affiliates	3.6		3.8		4.4
Intangible assets, net: (see Note 11)	972.9		1,017.8
Goodwill: (see Note 11)	296.3		296.3		296.3		296.3
Onshore Crude Oil Pipelines and Services [Member]
Information by business segment [Abstract]
Equity in income (loss) of unconsolidated affiliates	184.6		140.3		32.6
Intangible assets, net: (see Note 11)	2,223.6		4.5
Goodwill: (see Note 11)	859.9		305.1		311.2		311.2
Offshore Pipelines And Services [Member]
Information by business segment [Abstract]
Equity in income (loss) of unconsolidated affiliates	54.0		29.8		26.9
Intangible assets, net: (see Note 11)	41.6		54.7
Goodwill: (see Note 11)	82.0		82.1		82.1		82.1
Petrochemical and Refined Products Services [Member]
Information by business segment [Abstract]
Equity in income (loss) of unconsolidated affiliates	(13.3)	[1]	(22.3)	[1]	(17.9)	[1]
Intangible assets, net: (see Note 11)	374.8		100.0
Goodwill: (see Note 11)	781.3		1,055.3		1,056.0		1,061.5
Other Investment [Member]
Information by business segment [Abstract]
Equity in income (loss) of unconsolidated affiliates	0	[2]	0	[2]	2.4	[2]
Reportable Business Segments [Member] | NGL Pipelines and Services [Member]
Information by business segment [Abstract]
Revenues from third parties	17,078.4		17,119.1		15,158.9
Revenues from related parties	11.4		1.1		9.5
Intersegment and intrasegment revenues	13,716.5		11,096.6		12,500.6
Total revenues	30,806.3		28,216.8		27,669.0
Equity in income (loss) of unconsolidated affiliates	30.6		15.7		15.9
Gross operating margin	2,877.7		2,514.4		2,468.5
Property, plant and equipment, net (see Note 8)	11,766.9		9,957.8		8,494.8
Investments in unconsolidated affiliates (see Note 9)	682.3		645.5		324.6
Intangible assets, net: (see Note 11)	689.2		285.2		320.6
Goodwill: (see Note 11)	2,180.4		341.2		341.2
Segment assets	15,318.8		11,229.7		9,481.2
Reportable Business Segments [Member] | Onshore Natural Gas Pipelines & Services [Member]
Information by business segment [Abstract]
Revenues from third parties	4,182.6		3,522.7		3,297.7
Revenues from related parties	21.2		15.8		54.9
Intersegment and intrasegment revenues	1,106.7		959.7		871.6
Total revenues	5,310.5		4,498.2		4,224.2
Equity in income (loss) of unconsolidated affiliates	3.6		3.8		4.4
Gross operating margin	803.3		789.0		775.5
Property, plant and equipment, net (see Note 8)	8,835.5		8,917.3		8,950.1
Investments in unconsolidated affiliates (see Note 9)	23.2		24.2		24.9
Intangible assets, net: (see Note 11)	972.9		1,017.8		1,067.9
Goodwill: (see Note 11)	296.3		296.3		296.3
Segment assets	10,127.9		10,255.6		10,339.2
Reportable Business Segments [Member] | Onshore Crude Oil Pipelines and Services [Member]
Information by business segment [Abstract]
Revenues from third parties	20,151.9		20,609.1		17,661.6
Revenues from related parties	32.4		41.3		0.1
Intersegment and intrasegment revenues	12,678.7		10,222.3		6,906.9
Total revenues	32,863.0		30,872.7		24,568.6
Equity in income (loss) of unconsolidated affiliates	184.6		140.3		32.6
Gross operating margin	762.5		742.7		387.7
Property, plant and equipment, net (see Note 8)	2,332.2		1,479.9		1,385.9
Investments in unconsolidated affiliates (see Note 9)	1,767.7		1,165.2		493.8
Intangible assets, net: (see Note 11)	2,223.6		4.5		5.9
Goodwill: (see Note 11)	859.9		305.1		311.2
Segment assets	7,183.4		2,954.7		2,196.8
Reportable Business Segments [Member] | Offshore Pipelines And Services [Member]
Information by business segment [Abstract]
Revenues from third parties	150.3		151.7		182.7
Revenues from related parties	6.5		7.7		8.8
Intersegment and intrasegment revenues	6.5		9.6		10.4
Total revenues	163.3		169.0		201.9
Equity in income (loss) of unconsolidated affiliates	54.0		29.8		26.9
Gross operating margin	162.0		146.1		173.0
Property, plant and equipment, net (see Note 8)	1,145.1		1,223.7		1,343.0
Investments in unconsolidated affiliates (see Note 9)	493.7		531.8		479.0
Intangible assets, net: (see Note 11)	41.6		54.7		66.2
Goodwill: (see Note 11)	82.0		82.1		82.1
Segment assets	1,762.4		1,892.3		1,970.3
Reportable Business Segments [Member] | Petrochemical and Refined Products Services [Member]
Information by business segment [Abstract]
Revenues from third parties	6,316.5		6,258.5		6,208.9
Revenues from related parties	0		0		0
Intersegment and intrasegment revenues	1,779.6		1,764.0		1,758.9
Total revenues	8,096.1		8,022.5		7,967.8
Equity in income (loss) of unconsolidated affiliates	(13.3)		(22.3)		(17.9)
Gross operating margin	681.0		625.9		579.9
Property, plant and equipment, net (see Note 8)	3,047.2		2,712.4		2,559.5
Investments in unconsolidated affiliates (see Note 9)	75.1		70.4		72.3
Intangible assets, net: (see Note 11)	374.8		100.0		106.2
Goodwill: (see Note 11)	781.3		1,055.3		1,056.0
Segment assets	4,278.4		3,938.1		3,794.0
Reportable Business Segments [Member] | Other Investment [Member]
Information by business segment [Abstract]
Revenues from third parties	0		0		0
Revenues from related parties	0		0		0
Intersegment and intrasegment revenues	0		0		0
Total revenues	0		0		0
Equity in income (loss) of unconsolidated affiliates	0		0		2.4
Gross operating margin	0		0		2.4
Property, plant and equipment, net (see Note 8)	0		0		0
Investments in unconsolidated affiliates (see Note 9)	0		0		0
Intangible assets, net: (see Note 11)	0		0		0
Goodwill: (see Note 11)	0		0		0
Segment assets	0		0		0
Adjustments [Member]
Information by business segment [Abstract]
Revenues from third parties	0		0		0
Revenues from related parties	0		0		0
Intersegment and intrasegment revenues	(29,288.0)		(24,052.2)		(22,048.4)
Total revenues	(29,288.0)		(24,052.2)		(22,048.4)
Equity in income (loss) of unconsolidated affiliates	0		0		0
Gross operating margin	0		0		0
Property, plant and equipment, net (see Note 8)	2,754.7		2,655.5		2,113.1
Investments in unconsolidated affiliates (see Note 9)	0		0		0
Intangible assets, net: (see Note 11)	0		0		0
Goodwill: (see Note 11)	0		0		0
Segment assets	$ 2,754.7		$ 2,655.5		$ 2,113.1

[1] 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.

[2] 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.