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RETIREMENT BENEFIT PLANS - Schedule of Difference Amounts Recorded in AOCI (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Retirement Benefits [Abstract]
Prior service credit	$ (1.2)	$ (1.2)
Net gain	(18.3)	(20.3)
Total pre-tax amount	$ (19.5)	$ (21.5)

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Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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