Financing Receivables - Credit Quality Information - Financial Advisor Loans (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing receivables - credit quality information
Allowance for credit losses	$ 50	$ 68	$ 51
Commercial Loans
Financing receivables - credit quality information
Allowance for credit losses	47	66	$ 51
Commercial Loans \| Loans to financial advisors
Amortized cost basis by year of origination and loan-to-value ratio
Originated in Current Fiscal Year	137	171
Originated in Fiscal Year before Latest Fiscal Year	148	137
Originated Two Years before Latest Fiscal Year	119	101
Originated Three Years before Latest Fiscal Year	89	128
Originated Four Years before Latest Fiscal Year	116	84
Originated Five or More Years before Latest Fiscal Year	119	94
Total amortized cost basis	728	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	136	171
Originated in Fiscal Year before Latest Fiscal Year	147	137
Originated Two Years before Latest Fiscal Year	119	101
Originated Three Years before Latest Fiscal Year	89	127
Originated Four Years before Latest Fiscal Year	116	83
Originated Five or More Years before Latest Fiscal Year	113	86
Total amortized cost basis	720	705
Commercial Loans \| Loans to financial advisors \| Terminated
Financing receivables - credit quality information
Allowance for credit losses	5	7
Amortized cost basis by year of origination and loan-to-value ratio
Originated in Current Fiscal Year	1
Originated in Fiscal Year before Latest Fiscal Year	1
Originated Three Years before Latest Fiscal Year		1
Originated Four Years before Latest Fiscal Year		1
Originated Five or More Years before Latest Fiscal Year	6	8
Total amortized cost basis	$ 8	$ 10

Amount excluding accrued interest, of allowance for credit loss on financing receivable.

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Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

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Amount excluding accrued interest of financing receivable originated more than five years prior to current fiscal year.

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Amount excluding accrued interest of financing receivable originated three years prior to current fiscal year.

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