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Master Netting and Similar Agreements—Repurchase, Reverse Repurchase, and Securities Borrowing Transactions - Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Securities Sold under Agreements to Repurchase [Abstract]    
Gross amounts of recognized liabilities $ 1,098 $ 1,187
Gross amounts offset in the Balance Sheets 0 0
Net amounts of liabilities presented in the Balance Sheets 1,098 1,187
Offsetting securities purchased under agreements to resell 0 0
Securities/ government guaranteed loans collateral (1,098) (1,187)
Net amount $ 0 $ 0