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Financing Receivables - Credit Quality Information - Financial Advisor Loans (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Dec. 31, 2019 | [1]
--- | --- | --- | --- | --- | ---
Financing receivables - credit quality information |  |  |  |
Allowance for credit losses | $ 51 | $ 68 | $ 71 | $ 51
Commercial Loans |  |  |  |
Financing receivables - credit quality information |  |  |  |
Allowance for credit losses | 48 | 66 | $ 67 | $ 51
Commercial Loans | Loans to financial advisors |  |  |  |
Amortized cost basis by year of origination and loan-to-value ratio |  |  |  |
Originated in Current Fiscal Year | 106 | 171 |  |
Originated in Fiscal Year before Latest Fiscal Year | 155 | 137 |  |
Originated Two Years before Latest Fiscal Year | 124 | 101 |  |
Originated Three Years before Latest Fiscal Year | 91 | 128 |  |
Originated Four Years before Latest Fiscal Year | 120 | 84 |  |
Originated Five or More Years before Latest Fiscal Year | 135 | 94 |  |
Total amortized cost basis | 731 | 715 |  |
Commercial Loans | Loans to financial advisors | Active |  |  |  |
Amortized cost basis by year of origination and loan-to-value ratio |  |  |  |
Originated in Current Fiscal Year | 104 | 171 |  |
Originated in Fiscal Year before Latest Fiscal Year | 155 | 137 |  |
Originated Two Years before Latest Fiscal Year | 124 | 101 |  |
Originated Three Years before Latest Fiscal Year | 91 | 127 |  |
Originated Four Years before Latest Fiscal Year | 119 | 83 |  |
Originated Five or More Years before Latest Fiscal Year | 128 | 86 |  |
Total amortized cost basis | 721 | 705 |  |
Commercial Loans | Loans to financial advisors | Terminated |  |  |  |
Financing receivables - credit quality information |  |  |  |
Allowance for credit losses | 6 | 7 |  |
Amortized cost basis by year of origination and loan-to-value ratio |  |  |  |
Originated in Current Fiscal Year | 2 |  |  |
Originated Three Years before Latest Fiscal Year |  | 1 |  |
Originated Four Years before Latest Fiscal Year | 1 | 1 |  |
Originated Five or More Years before Latest Fiscal Year | 7 | 8 |  |
Total amortized cost basis | $ 10 | $ 10 |  |
[1] | Prior to January 1, 2020, the allowance for credit losses was based on an incurred loss model that did not require estimating expected credit losses over the expected life of the asset.

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