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Related Party Transactions Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Due to related parties $ 21 $ 23  
Fees and expenses of investment facilities and services      
Amounts reimbursed to Loews for services provided to the Company 44 43 $ 43
Due to related parties 21 23  
Corporate services and related travel expenses      
Amounts reimbursed to Loews for services provided to the Company 1 1  
Taxes paid      
Due to related parties 21 8  
Loews      
Amounts earned from Loews for insurance premiums $ 2 $ 2 $ 2