Annual report pursuant to Section 13 and 15(d)

Schedule II - Schedule of Valuation and Qualifying Accounts

v3.20.4
Schedule II - Schedule of Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Schedule of Valuation and Qualifying Accounts
(in millions)        
Description Balance
January 1,		 Charged to
Expenses		 Write-offs/
Payments/ Other		 Balance
December 31,
2020
Allowance for doubtful accounts $ 14  60  (59) $ 15 
Deferred tax assets—valuation allowance $ 70  3  (19) $ 54 
2019        
Allowance for doubtful accounts $ 7  53  (46) $ 14 
Deferred tax assets—valuation allowance $ 66  4  —  $ 70 
2018        
Allowance for doubtful accounts $ 10  51  (54) $ 7 
Deferred tax assets—valuation allowance $ 53  13  —  $ 66