Annual report pursuant to Section 13 and 15(d)

REVENUES - Deferred Revenue (Details)

v3.20.4
REVENUES - Deferred Revenue (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deferred Revenue Arrangement [Line Items]      
Realization of Deferred Revenue $ 35 $ 0 $ 0
Other Current Liabilities [Member]      
Deferred Revenue Arrangement [Line Items]      
Deferred Revenue (Current) 7 22 21
Net Increase (Decrease) (15) 1  
Other Noncurrent Liabilities [Member]      
Deferred Revenue Arrangement [Line Items]      
Net Increase (Decrease) (26) (13)  
Deferred Revenue (Long-Term) $ 0 $ 26 $ 39