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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

X

- Definition

Impairment of Related Party Transaction, Due from (to) Related Party

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No definition available.

+ Details

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Namespace Prefix:	glng_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Proceeds From Related Party Receivables

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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.

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No definition available.

+ Details

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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: