Financing Receivables - Credit Quality Information - Financial Advisor Loans (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Financing receivables - credit quality information
Allowance for credit losses	$ 52	$ 50	$ 53	$ 68
Commercial Loans
Financing receivables - credit quality information
Allowance for credit losses	49	47	$ 50	$ 66
Commercial Loans \| Loans to financial advisors
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	99	137
Year 2	126	148
Year 3	133	119
Year 4	110	89
Year 5	83	116
Prior	201	119
Total amortized cost basis	752	728
Commercial Loans \| Loans to financial advisors \| Active
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	99	136
Year 2	125	147
Year 3	132	119
Year 4	108	89
Year 5	83	116
Prior	194	113
Total amortized cost basis	741	720
Commercial Loans \| Loans to financial advisors \| Terminated
Financing receivables - credit quality information
Allowance for credit losses	7	5
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0	1
Year 2	1	1
Year 3	1	0
Year 4	2	0
Year 5	0	0
Prior	7	6
Total amortized cost basis	$ 11	$ 8

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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-Name Accounting Standards Codification
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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost excluding accrued interest, of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

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