RETIREMENT BENEFITS - Fair Value of Plan Assets by Asset Category (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,024,454	$ 956,345
Equity securities—U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	482,381	453,135
Equity securities—International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	100,705	94,919
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	422,570	397,529
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 18,798	$ 10,762