Financing Receivables - Credit Quality Information - Financial Advisor Loans (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing receivables - credit quality information
Allowance for credit losses	$ 48	$ 50	$ 68	$ 68
Commercial Loans
Financing receivables - credit quality information
Allowance for credit losses	45	47	$ 65	$ 66
Commercial Loans \| Loans to financial advisors
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	40	137
Year 2	131	148
Year 3	143	119
Year 4	115	89
Year 5	86	116
Prior	218	119
Total amortized cost basis	733	728
Commercial Loans \| Loans to financial advisors \| Active
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	40	136
Year 2	131	147
Year 3	142	119
Year 4	114	89
Year 5	86	116
Prior	212	113
Total amortized cost basis	725	720
Commercial Loans \| Loans to financial advisors \| Terminated
Financing receivables - credit quality information
Allowance for credit losses	5	5
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0	1
Year 2	0	1
Year 3	1	0
Year 4	1	0
Year 5	0	0
Prior	6	6
Total amortized cost basis	$ 8	$ 8

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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