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Schedule I - Condensed Financial Information of Registrant (Parent Company Only) (Transactions With Affiliates) (Details) - USD ($) $ in Millions | 12 Months Ended
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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 |

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