Financing Receivables - Credit Quality Information - Financial Advisor Loans (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing receivables - credit quality information
Allowance for credit losses	$ 52	$ 54	$ 63	$ 59
Loan write-offs	5	8	4
Commercial Loans
Financing receivables - credit quality information
Allowance for credit losses	41	45	54	$ 54
Loan write-offs	1	4	$ 2
Commercial Loans \| Loans to financial advisors
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	637	358
Year 2	310	351
Year 3	280	263
Year 4	216	123
Year 5	80	84
Prior	150	156
Total	1,673	1,335
Commercial Loans \| Loans to financial advisors \| Active
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	637	358
Year 2	309	351
Year 3	280	261
Year 4	215	121
Year 5	79	82
Prior	142	150
Total	1,662	1,323
Commercial Loans \| Loans to financial advisors \| Terminated
Financing receivables - credit quality information
Allowance for credit losses	7	6
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0	0
Year 2	1	0
Year 3	0	2
Year 4	1	2
Year 5	1	2
Prior	8	6
Total	$ 11	$ 12

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

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