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RETIREMENT BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit plan, expected future employer contributions, current fiscal year | $ 20 |  |
Actual contribution to defined benefit pension plans | $ 12 |  |
UK Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit plan, benefit obligation |  | $ 98 |
UK Pension Plan | Pension benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit plan, plan assets, amount |  | 50 |
UK Pension Plan | Pension benefits | Non-US |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined benefit plan, plan assets, amount |  | $ 118 |
Plan assets, target allocation, percentage | 17.00% | 83.00% |
Funded status of plan |  | $ 20 | $ 18

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