v3.21.2
BASIS OF PRESENTATION, PRINCIPLES OF CONSOLIDATION, AND SIGNIFICANT ACCOUNTING POLICIES - RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (Details) - USD ($)
$ in Millions
6 Months Ended
Jan. 06, 2021
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]          
Payments to acquire business interest $ 35        
Cash and cash equivalents   $ 464 $ 277 $ 352  
Restricted cash included in other current assets   40 2 29  
Total   504 279 $ 381 $ 322
Cash paid for taxes, net of refunds   121 175    
Cash paid for interest expense   $ 79 $ 133