RETIREMENT BENEFITS - Fair Value of Plan Assets by Asset Category (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 764,405	$ 1,024,454
Equity securities—U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	248,858	482,381
Equity securities—International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	52,394	100,705
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	448,908	422,570
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 14,245	$ 18,798