Total allowance for credit loss period increase (decrease)

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Total credit loss provision

+ References

No definition available.

+ Details

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Namespace Prefix:	tgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of allowance for credit loss of accounts and financing receivables. Includes, but is not limited to, notes and loan receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense (reversal of expense) for expected credit loss on net investment in direct financing lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
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-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=123408481&loc=SL77919132-209958

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of allowance for credit loss on net investment in direct financing lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (f)
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Definition

Amount of allowance for credit loss on net investment in sales-type and direct financing leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense (reversal of expense) for expected credit loss on net investment in sales-type and direct financing leases.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

+ Details

Name:	us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of credit loss expense (reversal of expense) for financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Financial Instruments Financial Instruments - Financing Receivables, allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Direct Financing Lease, Net Investment in Lease, Allowance for Credit Loss	$ 34,000	$ 35,400	$ 34,613	$ 25,325	$ 11,520	$ 11,055	$ 34,000	$ 25,325	$ 30,177	$ 11,155
Total credit loss provision	100,700	103,736	102,270	83,513	62,017	62,180	100,700	83,513	91,920	53,300
Net Investment in Lease, Allowance for Credit Loss				7,099
Direct Financing Lease, Net Investment in Lease, Credit Loss Expense (Reversal)	(1,400)	787	4,436	13,805	465	(100)	3,800	14,200
Total credit loss expense (reversal)	(3,036)	1,466	10,350	21,496	(163)	8,880
LNG Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Direct Financing Lease, Net Investment in Lease, Credit Loss Expense (Reversal)	(1,400)			13,800
Financial Guarantee [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Off-Balance Sheet, Credit Loss, Liability	1,800	2,000	2,298	1,566	1,851	2,139	1,800	1,566	2,080	2,139
Off-Balance Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(200)	(298)	218	(285)	(288)	0
Loans Receivable [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans to equity-accounted joint ventures	4,300	4,000	3,745	4,674	3,797	3,714	4,300	4,674	4,726	3,714
Financing Receivable, Credit Loss, Expense (Reversal)	300	255	(981)	877	83	0
Equity Method Investments [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Net Investment in Lease, Allowance for Credit Loss	60,600	62,336	61,614	51,948	44,849	45,272	60,600	51,948	$ 54,937	$ 36,292
Net Investment in Lease, Allowance for Credit Loss	$ (1,736)	$ 722	$ 6,677	$ 7,100	$ (423)	$ 8,980	$ 5,700	$ 15,700