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Capital Stock - Additional Information, Stock-based compensation (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
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
Weighted-average grant-date fair value of options granted (in dollars per share) | $ 0 | $ 2.55 | $ 1.16
Common stock conversion (in shares) | 1 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 5 years 6 months |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested | $ 3.6 | $ 3.5 | $ 0.1
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
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Common stock, shares reserved for issuance upon exercise of options or equity awards granted or to be granted | 10,254,117 | 11,324,227 |
Stock options granted (in shares) | 0 | 506,579 |
Stock option, term (in years) | 10 years |  |
Vesting period (in years) | 3 years |  |
Compensation costs | $ 0.0 | $ 1.6 | $ 1.1
Intrinsic value of outstanding in-the-money stock options | $ 7.1 | $ 10.5 |
Weighted-average remaining life (in years) | 4 years 6 months | 5 years 6 months |
Weighted-average grant-date fair value of options granted (in dollars per share) |  | $ 2.55 |
Expected volatility used in computing fair value of options granted | 41.27% |  |
Dividend yield used in computing fair value of options granted | 0.00% |  |
Risk-free interest rate used in computing fair value of options granted | 3.83% |  |
Estimated forfeiture rate used in computing fair value of options granted | 0.00% |  |
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] |  |  |
Vesting period (in years) | 3 years |  |
Common stock conversion (in shares) | 1 |  |
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
Vested restricted stock (in shares) | 386,305 | 651,135 | 631,706
Market value of vested restricted stock | $ 1.5 | $ 2.0 | $ 2.2
Stock granted (in shares) | 104,900 | 149,217 | 218,671
Share based compensation expense | $ 2.6 | $ 2.7 | $ 2.9
Shares Issued, Shares, Share-Based Payment, Arrangement, Vested and Deferred | 44,967 |  |
Restricted Stock Units | Teekay Tankers |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period (in years) | 3 years |  |
Restricted Stock Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Compensation costs | $ 0.7 | $ 0.3 | $ 0.3
Number of shares or units granted equity based compensation awards | 70,385 | 47,330 | 95,485

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