XML 139 R125.htm IDEA: XBRL DOCUMENT v3.20.4
SCHEDULE II. VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Movement in valuation and qualifying accounts      
Balance at Beginning of Period $ 4 $ 5 $ 4
Charged to Costs and Expenses 3 1 3
Charged to Other Accounts 0 0 0
Deductions (1) (2) (2)
Balance at End of Period 7 4 5
Cumulative Effect, Period of Adoption, Adjustment      
Movement in valuation and qualifying accounts      
Balance at Beginning of Period 1    
Balance at End of Period   1  
Cumulative Effect Period of Adoption Adjusted Balance      
Movement in valuation and qualifying accounts      
Balance at Beginning of Period 5    
Balance at End of Period   5  
Valuation allowance on deferred tax assets:      
Movement in valuation and qualifying accounts      
Balance at Beginning of Period 38 43 47
Charged to Costs and Expenses 0 0 0
Charged to Other Accounts 2 0 0
Deductions (5) (5) (4)
Balance at End of Period $ 35 $ 38 43
Valuation allowance on deferred tax assets: | Other Comprehensive Income (Loss)      
Movement in valuation and qualifying accounts      
Deductions     (1)
Income Tax Benefit | Valuation allowance on deferred tax assets:      
Movement in valuation and qualifying accounts      
Deductions     $ (3)