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SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ in Millions |  |  |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
May 16, 2023 | Apr. 24, 2023 | Mar. 06, 2023 | Sep. 05, 2022 | May 05, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | May 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Remaining unrecognized compensation expense related to non-vested awards |  |  |  |  |  | $ 166 |  |
Weighted average service period over which compensation cost is expected to be recognized (in years) |  |  |  |  |  | 2 years 10 days |  |
Bausch + Lomb |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares available for future grant (in shares) |  |  |  |  |  | 18,900,000 |  |
Remaining unrecognized compensation expense related to non-vested awards |  |  |  |  |  | $ 101 |  |
Weighted average service period over which compensation cost is expected to be recognized (in years) |  |  |  |  |  | 2 years 2 months 23 days |  |
RSUs | Bausch + Lomb |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  | 3,165,000 | 4,205,000 |
2014 Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Maximum shares authorized (in shares) |  |  |  |  |  |  |  | 18,000,000
Common shares available for issuance (in shares) |  |  |  |  |  |  |  | 20,000,000
Number of additional shares available for issuance (in shares) | 7,500,000 |  |  |  |  |  |  |
Number of shares available for future grant (in shares) |  |  |  |  |  | 18,238,000 |  |
2014 Plan, Retention RSU Grant | Certain Executive Officers and Other Members of Leadership | RSUs |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  |  |  |
2014 Plan, Retention RSU Grant | Certain Executive Officers and Other Members of Leadership | RSUs | Vesting Period One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 33.33% |  |  |  |
2014 Plan, Retention RSU Grant | Certain Executive Officers and Other Members of Leadership | RSUs | Vesting Period Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 33.33% |  |  |  |
2014 Plan, Retention RSU Grant | Certain Executive Officers and Other Members of Leadership | RSUs | Vesting Period Three |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 33.33% |  |  |  |
2022 Omnibus Incentive Plan | Bausch + Lomb |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Maximum shares authorized (in shares) |  | 38,000,000 |  |  | 28,000,000 |  |  |
Number of additional shares available for issuance (in shares) |  | 10,000,000 |  |  |  |  |  |
2022 Omnibus Incentive Plan | Stock options | Bausch + Lomb |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 3 years |  |  |
Incentive stock plan, term |  |  |  |  | 10 years |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | Stock options | Bausch + Lomb |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  |  | 1,318,681 |  |  |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | Stock options | Bausch + Lomb | Vesting Period One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |  |  |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | Stock options | Bausch + Lomb | Vesting Period Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |  |  |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | Stock options | Bausch + Lomb | Vesting Period Three |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |  |  |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | RSUs | Bausch + Lomb |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (in shares) |  |  | 375,000 |  |  |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | RSUs | Bausch + Lomb | Vesting Period One |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  | 50.00% |  |  |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | RSUs | Bausch + Lomb | Vesting Period Two |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award vesting rights, percentage |  |  | 50.00% |  |  |  |  |
2022 Omnibus Incentive Plan | Chief Executive Officer | PSUs | Bausch + Lomb |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vesting period |  |  | 4 years |  |  |  |  |
Granted (in shares) |  |  | 750,000 |  |  |  |  |
Performance period |  |  | 4 years |  |  |  |  |

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