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