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Schedule I - Condensed Financial Information of Registrant (Parent Company Only) (Transactions With Affiliates) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule I - Condensed Financial Information of Registrant (Parent Company Only) [Abstract]      
Receivables from affiliates $ 0    
Dividends received 81 $ 76 $ 56
Affiliate $ 152 $ 171