BENEFIT PLANS - Information for Pension Plans with an Accumulated Benefit Obligation in Excess of Plan Assets (Details) - Pension Plan - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Japan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 425	$ 390
Fair value of plan assets	416	344
U.S.
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	1,017	886
Fair value of plan assets	$ 824	$ 644