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Document and Entity Information
6 Months Ended
Jun. 30, 2021
Document And Entity Information [Abstract]  
Document Type 6-K
Amendment Flag false
Document Period End Date Jun. 30, 2021
Document Fiscal Year Focus 2021
Document Fiscal Period Focus Q2
Entity Registrant Name Teekay LNG Partners L.P.
Entity Central Index Key 0001308106
Current Fiscal Year End Date --12-31