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Long-Term Debt - Additional Information - Other (Detail)
12 Months Ended
Dec. 31, 2020
USD ($)
loan
Dec. 31, 2019
Debt Instrument [Line Items]    
Long-term Debt, Weighted Average Interest Rate, at Point in Time 3.80% 4.60%
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 262,300,000  
Long-term Debt, Maturities, Repayments of Principal in Year Two 463,500,000  
Long-term Debt, Maturities, Repayments of Principal in Year Three 392,800,000  
Long-term Debt, Maturities, Repayments of Principal in Year Four 310,900,000  
Long-term Debt, Maturities, Repayments of Principal in Year Five 187,800,000  
Long term debt principal repayments thereafter $ 469,800,000  
Number Of Loan Agreements, Minimum Required Vessel Market Value to Loan Ratios | loan 5  
Teekay Tankers    
Debt Instrument [Line Items]    
Minimum level of free cash be maintained as per loan agreements $ 35,000,000.0  
Teekay Tankers | Minimum    
Debt Instrument [Line Items]    
Revolving credit lines maturity period (in months) 6 months  
Teekay LNG    
Debt Instrument [Line Items]    
Minimum level of free cash be maintained as per loan agreements $ 35,000,000.0  
Teekay LNG | Minimum    
Debt Instrument [Line Items]    
Revolving credit lines maturity period (in months) 6 months  
2020 Debt Facility Maturing in December 2024    
Debt Instrument [Line Items]    
Percentage of debt 5.00%  
Long Term Debt1 | Transportation Equipment    
Debt Instrument [Line Items]    
Vessel market value to loan ratio 405.00%  
Vessel market value to loan minimum required ratio 125.00%  
Long Term Debt2 | Transportation Equipment    
Debt Instrument [Line Items]    
Vessel market value to loan ratio 273.00%  
Vessel market value to loan minimum required ratio 115.00%  
Long Term Debt3 | Transportation Equipment    
Debt Instrument [Line Items]    
Vessel market value to loan ratio 142.00%  
Vessel market value to loan minimum required ratio 120.00%  
Long Term Debt4 | Transportation Equipment    
Debt Instrument [Line Items]    
Vessel market value to loan ratio 215.00%  
Vessel market value to loan minimum required ratio 135.00%  
Long Term Debt5 | Transportation Equipment    
Debt Instrument [Line Items]    
Vessel market value to loan ratio 190.00%  
Vessel market value to loan minimum required ratio 125.00%