RETIREMENT BENEFITS - Schedule of Accumulated and Projected Benefit Obligation in Excess of Fair Value of Plan Assets (Details) - Pension Plans, Defined Benefit - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 635	$ 605
Fair value of plan assets	405	353
Accumulated benefit obligation	610	578
Fair value of plan assets	$ 405	$ 353

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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