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Segment Reporting - Narrative (Detail)
1 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended
May 08, 2019
USD ($)
May 08, 2019
USD ($)
Jun. 30, 2020
USD ($)
subsidiary
Jun. 30, 2019
USD ($)
May 08, 2019
USD ($)
Jun. 30, 2020
USD ($)
subsidiary
segment
Jun. 30, 2019
USD ($)
Segment Reporting Information [Line Items]              
Number of reportable segments | segment           3  
Equity income (loss) (note 4 and 13b)     $ 35,343,000 $ (6,284,000)   $ 37,656,000 $ (67,937,000)
Teekay Offshore [Member]              
Segment Reporting Information [Line Items]              
Equity income (loss) (note 4 and 13b)   $ 0     $ 3,100,000    
Equity Method Investment, Other than Temporary Impairment           $ 64,900,000 64,900,000
Equity Method Investment, Realized Gain (Loss) on Disposal $ 8,900,000           $ 8,900,000
Subsidiaries              
Segment Reporting Information [Line Items]              
Number of Subsidiaries | subsidiary     2     2