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v3.20.1

RELATED PARTY TRANSACTIONS - Transactions with OneLNG and Subsidiaries - Narrative (Details) - OneLNG - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Related Party Transaction [Line Items] |  |  |
Proceeds from related party receivables | $ 4.5 |  |
Trading balances with affiliates |  |  |
Related Party Transaction [Line Items] |  |  |
Impairment of related party transaction, due from (to) related party |  | $ 3.0 | $ 12.7

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- 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

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

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