Barrels of Oil Equivalents Spilled

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- Definition

Loss Contingency, Loss of Life, Number

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- Definition

Self insurance reserve expected to be paid subsequent to next fiscal year.

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of loss contingency liability.

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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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- Definition

The amount of cash paid during the current period for taxes other than income taxes.

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- Definition

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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No definition available.

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- Definition

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

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Commitments and Contingencies (Detail) $ in Millions	3 Months Ended	12 Months Ended
Commitments and Contingencies (Detail) $ in Millions	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Feb. 28, 2015 USD ($)	Dec. 31, 2014 USD ($)	Nov. 08, 2013 bbl Person
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 7.0	$ 7.0
Payments for Other Taxes	8.6	8.6
Loss Contingency Accrual, at Carrying Value		0.1		$ 1.0
Self Insurance Reserve	12.3	11.4		7.2
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year	7.1	7.1
Commodity
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Firm Purchase Commitments		188.3
Antero
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Contingent consideration, current liability			$ 40.0	40.0
Arrow Acquisition Class Action Lawsuit
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Loss of Life, Number \| Person					47
Arrow Acquisition Class Action Lawsuit \| Minimum
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Barrels of Oil Equivalents Spilled \| bbl					50,000
Identified Growth Projects
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Firm Purchase Commitments		12.7
Other Growth and Maintenance Contractual Purchase Obligations
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Firm Purchase Commitments		13.5
Tres Palacios Holdings LLC
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Loss Contingency, Estimate of Possible Loss	2.0	2.0
Crestwood Equity Partners LP
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Self Insurance Reserve	17.8	17.2		$ 14.6
Self Insurance Reserve Expected To Be Paid Subsequent To Next Fiscal Year	$ 11.3	$ 11.3