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v2.4.0.6

Segment Reporting - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2012 Segment
Segment Reporting Information [Line Items] |
Number of reportable segments | 2
Liquefied Gas Segment [Member] |
Segment Reporting Information [Line Items] |
Number of LNG carriers | 27
Number of LNG carriers included in joint ventures accounted for under the equity method | 16
Number of LPG carriers | 3
Number of Multigas carriers | 2
Conventional Tankers [Member] |
Segment Reporting Information [Line Items] |
Number of crude oil tankers | 10
Number of Handymax product tanker | 1

X
- Definition Number Of Carrier + References No definition available. + Details
Name: | tgp_NumberOfCarrier
Namespace Prefix: | tgp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of LNG carriers included in joint ventures accounted for under the equity method. + References No definition available. + Details
Name: | tgp_NumberOfCarriersIncludedInJointVenturesAccountedForUnderEquityMethod
Namespace Prefix: | tgp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of crude oil tankers. + References No definition available. + Details
Name: | tgp_NumberOfCrudeOilTankers
Namespace Prefix: | tgp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Handymax product tanker. + References No definition available. + Details
Name: | tgp_NumberOfHandymaxProductTanker
Namespace Prefix: | tgp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of LPG carriers. + References No definition available. + Details
Name: | tgp_NumberOfLpgCarriers
Namespace Prefix: | tgp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Multigas carriers. + References No definition available. + Details
Name: | tgp_NumberOfMultigasCarriers
Namespace Prefix: | tgp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration