XML 132 R118.htm IDEA: XBRL DOCUMENT v3.20.4
INCOME TAXES - Uncertain Tax Positions (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Uncertain Tax Positions    
Balance at the beginning of the period $ 63 $ 58
Total balance at beginning of the period 73 67
Additions 22 14
Reductions (2) (1)
Prior year tax positions: Additions 2 1
Prior year tax positions: Reductions (2)  
Lapse of applicable statute of limitations (9) (9)
Balance at the end of the period 74 63
Total balance at the end of the period 84 73
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense [Abstract]    
Interest and penalties at period start 10 9
Interest and penalties recognized in income tax expense   1
Interest and penalties at period end $ 10 $ 10