Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Nov. 01, 2014	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Jan. 31, 2015
Goodwill [Line Items]
Goodwill		$ 3,710.0us-gaap_Goodwill	$ 3,684.7us-gaap_Goodwill	$ 3,821.6us-gaap_Goodwill
Texas Operating Segment
Goodwill [Line Items]
Goodwill		1,168.2	1,168.2	1,256.7
Louisiana Operating Segment
Goodwill [Line Items]
Goodwill		786.8	786.8	885.1
Oklahoma Operating Segment
Goodwill [Line Items]
Goodwill		190.3	190.3	190.3
Crude and Condensate
Goodwill [Line Items]
Goodwill		137.8	112.5	106.0
Corporation [Member]
Goodwill [Line Items]
Goodwill		1,426.9	1,426.9
LPC [Member]
Goodwill [Line Items]
Goodwill					25.3
Increase in the Partnership's goodwill		$ 25.3
Finite-Lived Intangible Asset, Useful Life	10 years
Minimum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life		10 years
Maximum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life		20 years