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Commitments and Contingencies - Additional Information (Details) bbl in Millions, Bcf in Millions			9 Months Ended
	Nov. 01, 2019 USD ($)	Mar. 23, 2017 USD ($)	Sep. 30, 2019 USD ($) bbl Bcf
Commitments and Contingencies [Line Items]
Required delivery time-frame under volume commitments time frame agreements			25 years
Estimable future commitments under agreements			$ 612,100,000
Loss contingency accrual			$ 20,000,000
Mirada Litigation | Pending
Commitments and Contingencies [Line Items]
Damages sought (in excess of)		$ 100,000,000
Mirada Litigation | Pending | Subsequent Event
Commitments and Contingencies [Line Items]
Damages sought (in excess of)	$ 200,000,000
Crude Oil
Commitments and Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl) | bbl			47.6
Natural gas liquids
Commitments and Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl) | bbl			37.3
Natural Gas
Commitments and Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl) | Bcf			869.5
Water
Commitments and Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl) | bbl			18.1

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- Definition

Oil and Gas Delivery Commitments and Contracts, Maximum Term

+ References

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- Definition

Quantity of oil and gas subject to delivery commitment.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1207
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Amount of loss contingency liability.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

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