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Vessel Charters (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Vessel Charters (Additional Textual) [Abstract]
Restricted cash on deposit	$ 475.8	$ 476.1
Restricted cash deposits relating to certain term loans and dry docking expenditures and emergency	50.9	19.5
Carrying amount of tax indemnification guarantees	25.4	26.0
Estimated charter hire payments	$ 908.0
Estimated charter hire payments duration	from 2017 to 2037
Capital leases assets	five Suezmax tankers
Capital Lease Start of Lessors Option to Sell	2012
Lease terms maximum period	2017
Two Vessels [Member]
Vessel Charters (Textual) [Abstract]
Tax indemnification of lease contracts	2033
Three Vessels [Member]
Vessel Charters (Textual) [Abstract]
Tax indemnification of lease contracts	2041
Teekay Tangguh Borrower LLC [Member]
Vessel Charters (Textual) [Abstract]
Partnership interest owned	99.00%
Teekay BLT Corporation [Member]
Vessel Charters (Textual) [Abstract]
Partnership interest owned	70.00%
Teekay Tangguh Joint Venture [Member]
Vessel Charters (Textual) [Abstract]
Partnership interest owned	69.00%	69.00%

X

- Definition

Lease expiration year.

+ References

No definition available.

+ Details

Name:	tgp_CapitalLeaseEndPeriod
Namespace Prefix:	tgp_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Capital lease period.

+ References

No definition available.

+ Details

Name:	tgp_CapitalLeasePeriod
Namespace Prefix:	tgp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Capital lease start of lessors option to sell.

+ References

No definition available.

+ Details

Name:	tgp_CapitalLeaseStartOfLessorsOptionToSell
Namespace Prefix:	tgp_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Carrying amount of tax indemnification guarantees.

+ References

No definition available.

+ Details

Name:	tgp_CarryingAmountOfTaxIndemnificationGuarantees
Namespace Prefix:	tgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Estimated future payment under capital lease.

+ References

No definition available.

+ Details

Name:	tgp_EstimatedFuturePaymentUnderCapitalLease
Namespace Prefix:	tgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Lease expiration year plus statute barred period.

+ References

No definition available.

+ Details

Name:	tgp_LeaseExpirationYear
Namespace Prefix:	tgp_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of assets under capital lease.

+ References

No definition available.

+ Details

Name:	tgp_NumberOfAssetsUnderCapitalLease
Namespace Prefix:	tgp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Partnership interest owned in joint venture.

+ References

No definition available.

+ Details

Name:	tgp_PartnershipInterestOwnedInJointVenture
Namespace Prefix:	tgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Restricted cash deposits relating to certain term loans and dry docking expenditures and emergency.

+ References

No definition available.

+ Details

Name:	tgp_RestrictedCashDepositsRelatingToCertainTermLoansAndDryDockingExpendituresAndEmergency
Namespace Prefix:	tgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	tgp_VesselChartersAdditionalTextualAbstract
Namespace Prefix:	tgp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	tgp_VesselChartersTextualAbstract
Namespace Prefix:	tgp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-BRD

-Chapter 4

-Paragraph 80

-Subparagraph Exhibit 4-8, 3

-IssueDate 2006-05-01

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant