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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE LOSS - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 05, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized loss   $ 0 $ 0 $ (7)
LoyaltyOne        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized loss $ 7