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v3.21.2

Segment Information - Narrative (Details) | 6 Months Ended | 12 Months Ended
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Jun. 30, 2021 carrier segment operational_flng undergoing_conversion | Dec. 31, 2020 segment
Segment Reporting [Abstract] |  |
Number of reportable segments | segment | 3 | 4
Number of operational FLNG | operational_flng | 1 |
Number of undergoing conversions | undergoing_conversion | 1 |
Number of carriers earmarked for conversion | carrier | 1 |

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- Definition Number Of Carriers Earmarked For Conversion + References No definition available. + Details
Name: | glng_NumberOfCarriersEarmarkedForConversion
Namespace Prefix: | glng_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number Of Operational FLNG + References No definition available. + Details
Name: | glng_NumberOfOperationalFLNG
Namespace Prefix: | glng_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number Of Undergoing Conversions + References No definition available. + Details
Name: | glng_NumberOfUndergoingConversions
Namespace Prefix: | glng_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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