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RELATED PARTY TRANSACTIONS - Transactions with OneLNG and Subsidiaries - Narrative (Details) - OneLNG - USD ($) $ in Millions	12 Months Ended
	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

X

- 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

X

- 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: