Diameter Of Pipeline

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- Definition

Milesof Pipeline

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- Definition

Numberof Pipeline Systems

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- Definition

Storage Capacity

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This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 13
-Article 5

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments in Unconsolidated Affiliates Narrative (Detail) $ in Millions, ft³ in Billions				1 Months Ended					3 Months Ended		12 Months Ended
	May. 05, 2016 USD ($)	Oct. 07, 2013 USD ($)	Sep. 04, 2013 USD ($)	Apr. 30, 2016 USD ($)	Feb. 29, 2016 USD ($)	Jan. 31, 2016 USD ($)	Dec. 31, 2014 USD ($)	Oct. 31, 2013 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) mi in System ft³	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period									$ 5.5	$ 17.9	$ 41.8	$ 144.4	$ 151.5
Total cash consideration, paid		$ 34.9						$ 34.9
Gain (loss) on long-lived assets, net									0.0	(0.8)	227.8	35.1	(5.3)
Investments in unconsolidated affiliates (Note 6)							$ 295.1		260.6	254.3	254.3	295.1
Related Party Transaction, Expenses from Transactions with Related Party									$ 0.7	0.9	$ 2.8	0.2	0.0
Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period							107.5
Equity method ownership percentage									50.00%		50.00%
Investments in unconsolidated affiliates (Note 6)							232.9		$ 202.4	202.4	$ 202.4	232.9
Proceeds from Equity Method Investment, Dividends or Distributions					$ 5.1				5.1		$ 12.5
Jackalope Gas Gathering Services, L.L.C. \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions	$ 7.0
Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period							66.4		$ 5.5	5.7
Equity method ownership percentage									50.01%		50.01%
Total cash consideration, paid							132.8
Gain (loss) on long-lived assets, net							30.6					30.6
Investments in unconsolidated affiliates (Note 6)							36.0		$ 43.1	36.8	$ 36.8	36.0
Miles of pipeline \| mi											63
Diameter of pipeline \| in											24
Number of pipeline systems \| System											10
Proceeds from Equity Method Investment, Dividends or Distributions											$ 7.4
Tres Palacios Holdings LLC \| Tres Palacios North Pipeline Lateral
Schedule of Equity Method Investments [Line Items]
Miles of pipeline \| mi											52
Tres Palacios Holdings LLC \| Tres Palacios South Pipeline Lateral
Schedule of Equity Method Investments [Line Items]
Miles of pipeline \| mi											11
Tres Palacios Holdings LLC \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions				$ 4.1
Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period										3.7	$ 10.7	3.4
Equity method ownership percentage			50.00%						50.01%		50.01%
Investments in unconsolidated affiliates (Note 6)							26.2		$ 15.1	15.1	$ 15.1	26.2
Proceeds from Equity Method Investment, Dividends or Distributions						$ 0.6			0.6	0.3	$ 1.9
Brookfield Infrastructure Group [Member] \| Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Equity method ownership percentage											49.99%
Crestwood Equity Partners LP
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period									5.5	18.1	$ 42.0	108.6	151.5
Gain (loss) on long-lived assets, net									0.0	(1.0)	821.2	1.9	(5.3)
Investments in unconsolidated affiliates (Note 6)							295.1		260.6		254.3	295.1
Related Party Transaction, Expenses from Transactions with Related Party									$ 0.1	0.1	$ 0.4	0.5	$ 25.3
Crestwood Equity Partners LP \| Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates (Note 6)							$ 35.8					35.8
Tres Palacios Storage Company L L C [Member]
Schedule of Equity Method Investments [Line Items]
Storage capacity \| ft³											38.4
Related Party Transaction, Expenses from Transactions with Related Party											$ 2.8	0.2
Crude Logistics L L C [Member] \| Powder River Basin Industrial Complex, LLC
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period			$ 22.5
Crestwood Niobrara LLC \| Jackalope Gas Gathering Services, L.L.C.
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period										$ 8.8	25.4	$ 105.2
Crestwood Niobrara LLC \| Tres Palacios Holdings LLC
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated affiliates in period											$ 5.7