SCHEDULE II – CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] | |||
Balance at Beginning of Period | $ 56 | $ 64 | $ 58 |
Charged to Costs and Expenses | 0 | 34 | 55 |
Charged to Other Accounts | 0 | 0 | 0 |
Deductions | 13 | 42 | 49 |
Balance at End of Period | $ 43 | $ 56 | $ 64 |