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INCOME TAXES - Reconciliation of Beginning and Ending Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits at January 1 $ 8 $ 7 $ 6
Additions for tax positions of prior periods 0 1 1
Additions for tax positions of current period 1 1 1
Settlements with taxing authorities 0 (1) 0
Lapse of applicable statute of limitations (1) 0 (1)
Adjustments to tax positions (1) 0 0
Unrecognized tax benefits at December 31 $ 7 $ 8 $ 7