XML 49 R38.htm IDEA: XBRL DOCUMENT v3.19.1

Derivative Instruments - Outstanding Commodity Derivatives (Details)	3 Months Ended
	Mar. 31, 2019 MMBTU $ / MMBTU
Natural gas (IFERC TRANSCO Z6 non-NY)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	8,250,000
Swaps Weighted Average (in usd per Mmbtu) | $ / MMBTU	0.41
Natural gas (IFERC TRANSCO Z6 non-NY)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	32,100,000
Swaps Weighted Average (in usd per Mmbtu) | $ / MMBTU	2.61
Natural gas (IFERC TRANSCO Leidy Line Receipts)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	41,250,000
Swaps Weighted Average (in usd per Mmbtu) | $ / MMBTU	(0.53)
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	74,900,000
Swaps Weighted Average (in usd per Mmbtu) | $ / MMBTU	2.85
Natural gas (NYMEX)
Derivative [Line Items]
Volume (in Mmbtu) | MMBTU	82,500,000
Swaps Weighted Average (in usd per Mmbtu) | $ / MMBTU	2.81

X

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Average fixed price related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeSwapTypeAverageFixedPrice
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cog_NaturalGasSwapWithContractPeriodOfOctober2018ToDecember2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cog_NaturalGasSwapWithContractPeriodOfJanuary2019ToDecember2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cog_NaturalGasSwapWithContractPeriodOfOctober2018ToDecember2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cog_NaturalGasCollarWithContractPeriodOfOctober2018ToDecember2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=cog_NaturalGasCollarWithContractPeriodOfOctober2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: