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Capital Stock - Additional Information, Stock-based compensation of Subsidiaries (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options granted (in shares) | 0 | 507,000 | 1,490,000
Stock option per share value (dollars per share) | $ 0 | $ 5.81 | $ 2.88
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Deferred | 28,154 | 18,932 |
Non-Management Directors | Teekay Tankers |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture | $ 0.4 | $ 0.3 | $ 0.3
Restricted Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares or units granted equity based compensation awards | 70,385 | 47,330 | 95,485
Employee stock compensation and other, Number of Shares | 132,023 | 28,398 |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period (in years) | 3 years |  |
Stock options granted (in shares) | 0 | 506,579 |
Stock option, term (in years) | 10 years |  |
Stock Options | Teekay Tankers |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options granted (in shares) | 0 |  |
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares or units granted equity based compensation awards | 273,657 | 329,735 | 787,586
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture | $ 2.6 | $ 1.9 | $ 2.3
Vesting period (in years) | 3 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Deferred | 180,965 | 354,580 |
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instrument other than Options, Vested and Deferred | 96,708 |  |
Restricted Stock Units | Teekay Tankers |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period (in years) | 3 years |  |
Restricted Stock Units | Officers and Employees | Teekay Tankers |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares or units granted equity based compensation awards | 41,638 | 63,699 | 104,185
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture | $ 3.0 | $ 2.3 | $ 1.9
2007 LTIP [Member] | Common Class A | Non-Management Directors | Teekay Tankers |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of common shares or units issued related to the exercise of share based compensation during the period |  | 8,188 | 16,648
2023 LTIP | Common Class A | Non-Management Directors | Teekay Tankers |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of common shares or units issued related to the exercise of share based compensation during the period | 5,512 |  |

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