XML 131 R110.htm IDEA: XBRL DOCUMENT
v3.22.4

SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Schedule of Future Costs to Settle Asset Retirement Obligations (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Extractive Industries [Abstract] |  |  |
Future asset retirement obligations | $ 222 | $ 205 | $ 120

X
- Definition Asset Retirement Obligation, Future Cost + References No definition available. + Details
Name: | gpor_AssetRetirementObligationFutureCost
Namespace Prefix: | gpor_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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