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REVENUE - Change in Contract Balances (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Change In Contract With Customer Asset [Roll Forward]
Contract with customer, asset, net, beginning balance	$ 18,656
Payments received for services billed in prior period	(17,776)
Services provided and billed in current period	233,161
Payments received for services billed in current period	(207,261)
Contract with customer, asset, net, ending balance	26,780
Change In Contract With Customer Liability [Roll Forward]
Contract with customer, liability, beginning balance	(27,076)
Deferred commissioning period revenue	4,220
Contract with customer, liability, ending balance	$ (22,856)

X

- Definition

Change In Contract With Customer Asset

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

Change In Contract With Customer Liability

+ References

No definition available.

+ Details

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Namespace Prefix:	glng_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Contract with Customer, Asset, Payment Received for Services Billed in Current Period

+ References

No definition available.

+ Details

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

X

- Definition

Contract with Customer, Asset, Payment Received for Services Billed in Prior Period

+ References

No definition available.

+ Details

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Namespace Prefix:	glng_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Contract with Customer, Asset, Revenue Recognized

+ References

No definition available.

+ Details

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

X

- Definition

Contract with Customer, Liability, Deferred Commission Period Billing

+ References

No definition available.

+ Details

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Namespace Prefix:	glng_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

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Period Type:	instant