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RETIREMENT BENEFITS - Narrative (Details) - Pension Benefits $ in Millions	9 Months Ended
	Sep. 30, 2025 USD ($)
Defined Benefit Plan, Funded Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected future employer contributions	$ 750
Contributions paid	702
Defined Benefit Plan, Underfunded Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, expected future employer contributions	450
Contributions paid	$ 333

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