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Derivative Instruments - Interest Rate Swap Agreements (Parenthetical) (Detail) - 12 months ended Dec. 31, 2015 € in Millions, $ in Millions	USD ($)	EUR (€)
Derivative [Line Items]
Reducing principal amount of interest rate swaps	$ 76.1	€ 70.1
Minimum [Member]
Derivative [Line Items]
Variable interest rate on Debt	0.30%
Maximum [Member]
Derivative [Line Items]
Variable interest rate on Debt	2.80%

X

- Definition

Reduced Principal Amount of Interest Rate Swaps

+ References

No definition available.

+ Details

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

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: