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v3.4.0.3

Segment Reporting - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2015 Vessel Segment
Segment Reporting Information [Line Items] |
Number of reportable segments | Segment | 2
Liquefied Gas Segment [Member] | Liquefied Natural Gas [Member] |
Segment Reporting Information [Line Items] |
Number of vessels | 50
Liquefied Gas Segment [Member] | Liquefied Natural Gas [Member] | Corporate Joint Venture [Member] |
Segment Reporting Information [Line Items] |
Number of vessels | 26
Liquefied Gas Segment [Member] | Liquefied Petroleum Gas Multi Gas [Member] |
Segment Reporting Information [Line Items] |
Number of vessels | 29
Liquefied Gas Segment [Member] | Liquefied Petroleum Gas [Member] | Corporate Joint Venture [Member] |
Segment Reporting Information [Line Items] |
Number of vessels | 23
Conventional Tankers [Member] | Suezmax Tankers [Member] |
Segment Reporting Information [Line Items] |
Number of vessels | 7
Conventional Tankers [Member] | Handymax Product [Member] |
Segment Reporting Information [Line Items] |
Number of vessels | 1

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- Definition Number Of Vessels + References No definition available. + Details
Name: | tgp_NumberOfVessels
Namespace Prefix: | tgp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of vessels in partnership. + References No definition available. + Details
Name: | tgp_NumberOfVesselsInPartnership
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

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

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tgp_LiquefiedGasSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementOperatingActivitiesSegmentAxis=tgp_LiquefiedNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=us-gaap_CorporateJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementOperatingActivitiesSegmentAxis=tgp_LiquefiedPetroleumGasMultiGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementOperatingActivitiesSegmentAxis=tgp_LiquefiedPetroleumGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=tgp_ConventionalTankersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementOperatingActivitiesSegmentAxis=tgp_SuezmaxTankersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementOperatingActivitiesSegmentAxis=tgp_HandymaxProductMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |