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v3.21.1

RELATED PARTY TRANSACTIONS - Transactions with OneLNG and Subsidiaries - Narrative (Details) - OneLNG - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Related Party Transaction [Line Items] |  |
Proceeds from related party receivables | $ 0.6 | $ 4.5
Trading balances with affiliates |  |
Related Party Transaction [Line Items] |  |
Impairment of related party transaction, due from (to) related party | $ 0.0 | $ 3.0

X
- Definition Impairment of Related Party Transaction, Due from (to) Related Party + References No definition available. + Details
Name: | glng_ImpairmentofRelatedPartyTransactionDuefromtoRelatedParty
Namespace Prefix: | glng_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Proceeds From Related Party Receivables + References No definition available. + Details
Name: | glng_ProceedsFromRelatedPartyReceivables
Namespace Prefix: | glng_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- 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_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=glng_OneLNGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=glng_TradingBalancesDuefromAffiliatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |