XML 63 R42.htm IDEA: XBRL DOCUMENT
v3.20.1

Fair Value Measurements - Narrative (Details) | 3 Months Ended
--- | ---
Mar. 31, 2020 impaired_asset_and_liability
Fair Value Disclosures [Abstract] |
Number of non-financial assets and liabilities impaired | 0

X
- Definition Represents the number of non-financial assets and liabilities that were impaired during the period. + References No definition available. + Details
Name: | cog_NumberOfNonFinancialAssetsAndLiabilitiesImpaired
Namespace Prefix: | cog_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration