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CAPITAL STOCK - Narrative (Details) shares in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2025 USD ($) shares | Jun. 30, 2024 USD ($) shares | Jun. 30, 2025 USD ($) plan shares | Jun. 30, 2024 USD ($) plan shares | Dec. 31, 2024 USD ($) shares | Oct. 30, 2024 shares | Dec. 31, 2023 USD ($) | Dec. 12, 2023 shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Treasury stock, shares, share based compensation plan to be deliverable (in shares) |  |  | 6,900 |  |  |  |  |
Treasury stock, share-based compensation plan settlement (in shares) | 30 | 100 | 2,000 | 3,300 |  |  |  |
Share-based compensation cash settlement | $ | $ 0.0 | $ 0.0 | $ 156.0 | $ 69.0 |  |  |  |
Treasury stock |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Treasury stock, common (in shares) | 2,200 |  | 2,200 |  | 2,500 |  |  |
Common stock held by trustee for delivery under share-based compensation plans (in share) | $ | $ 202.2 |  | $ 202.2 |  | $ 92.9 |  |  |
2023 SBC |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Accrual for repurchase of stock under automatic share purchase plan | $ |  |  |  |  |  |  | $ 7.5 |
RSUs |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |  |
RSUs | Share-Based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting percentage |  |  | 33.30% |  |  |  |  |
RSUs | Share-Based Payment Arrangement, Tranche Two |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting percentage |  |  | 33.30% |  |  |  |  |
RSUs | Share-Based Payment Arrangement, Tranche Three |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting percentage |  |  | 33.30% |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period |  |  | 4 years |  |  |  |  |
Employee Stock Option | Share-Based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |  |  |
Employee Stock Option | Share-Based Payment Arrangement, Tranche Two |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |  |  |
Employee Stock Option | Share-Based Payment Arrangement, Tranche Three |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |  |  |
Employee Stock Option | Share-Based Payment Arrangement, Tranche Four |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |  |  |
PSUs |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award performance period |  |  | 3 years |  |  |  |  |
PSUs | Minimum |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment award, awards granted, percentage of target |  |  | 0.00% |  |  |  |  |
PSUs | Maximum |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment award, awards granted, percentage of target |  |  | 200.00% |  |  |  |  |
Share-Based Payment Arrangement |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation cash settlement | $ | $ 0.0 | $ 0.0 | $ 156.0 | $ 69.0 |  |  |  |
2023 NCIB |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share repurchase program, authorized, number of shares (in shares) |  |  |  |  |  |  |  | 11,800
Accrual for repurchase of stock under automatic share purchase plan | $ |  |  |  |  |  |  | $ 2.7 |
NCIB ASPP |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share repurchase program, number of effective plans | plan |  |  | 1 | 1 |  |  |  |
SBC ASPP |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share repurchase program, number of effective plans | plan |  |  | 1 | 2 |  |  |  |
2024 NCIB |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share repurchase program, authorized, number of shares (in shares) |  |  |  |  |  | 8,600 |  |
Share repurchase program, remaining authorized, number of shares (in shares) | 7,100 |  | 7,100 |  |  |  |  |

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