Related Parties - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Lease cost	$ 337	$ 328	$ 319
Lease right-of-use assets	1,029	922
Lease liabilities	1,066	958
Operating expenses reimbursed	$ 12,186	10,865	10,674
Financial Advisor [Member]
Related Party Transaction [Line Items]
Percentage of branch office space leased from its financial advisors	11.00%
Lease cost	$ 45	41	37
Lease right-of-use assets	114	105
Lease liabilities	116	106
BB Trust [Member] | Olive Street [Member]
Related Party Transaction [Line Items]
Investment advisory fee revenue	260	239	233
Edward Jones Money Market Fund [Member]
Related Party Transaction [Line Items]
Revenue contracts with customers	136	103
Total fees voluntarily waived to limit fund expenses	42	89	190
Edward Jones Money Market Fund [Member] | Olive Street [Member]
Related Party Transaction [Line Items]
Total fees waived		8	51
Investment advisory fee revenue	$ 57	$ 56	$ 15