Related Parties - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Lease cost	$ 319	$ 304	$ 280
Lease right-of-use assets	922	915
Lease liabilities	$ 954	938
Financial Advisor [Member] \| Edward D. Jones & Co., L. P [Member]
Related Party Transaction [Line Items]
Percentage of branch office space leased from its financial advisors	10.00%
Lease cost	$ 37	35	34
Lease right-of-use assets	95	89
Lease liabilities	96	89
BB Trust [Member] \| Olive Street [Member]
Related Party Transaction [Line Items]
Expense paid to sub-advisers	233	174	147
Investment advisory fee revenue	233	174	147
Edward Jones Money Market Fund [Member] \| Edward D. Jones & Co., L. P [Member]
Related Party Transaction [Line Items]
Revenue contracts with customers		46	138
Total fees voluntarily waived to limit fund expenses	190	133	30
Edward Jones Money Market Fund [Member] \| Passport Research, Ltd [Member]
Related Party Transaction [Line Items]
Investment advisory fee revenue	15	56	$ 58
Total fees waived	$ 51	$ 7

Amount of fees voluntarily waived to limit fund expenses.

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Operating lease space owned by financial advisors

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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