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Dropdowns - Additional Information (Detail) (USD $) In Millions, unless otherwise specified		12 Months Ended
	Oct. 27, 2011 Vessel	Dec. 31, 2010 Conventional Tankers [Member] Vessel	Mar. 17, 2010 Conventional Tankers [Member] Tanker
Business Acquisition [Line Items]
Number of vessels acquired	3	3	3
Increase in Partnership's net income due to effect of adjustment in common control exchanges		$ 2.3

X

- Definition

Adjustment to Partnership's net income (loss) as a result of business acquisitions between entities under common control.

+ References

No definition available.

+ Details

Name:	tgp_IncreaseInPartnershipsNetIncomeLossDueToEffectOfAdjustmentInCommonControlExchanges
Namespace Prefix:	tgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Number of vessels acquired.

+ References

No definition available.

+ Details

Name:	tgp_NumberOfVesselsAcquired
Namespace Prefix:	tgp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

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