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Loans and Interest Receivable - Consumer Receivables (Details) - Consumer Receivables - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans, advances, and interest and fees receivable $ 2,244 $ 2,169
Threshold period, write-off of receivables 180 days  
Threshold period, write-off of bankrupt accounts 60 days  
Installment Loans Receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Expected period of repayment 12 months