RETIREMENT AND DEFERRED COMPENSATION PLANS - Fair Values of Plan Assets for Each Major Asset Category Based on Nature and Significant Concentration of Risks in Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 254	$ 262
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	38	49
Overseas quoted equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	38	49
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200	211
U.K. government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138	168
U.K. corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	62	43
Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 16	$ 2