Segment Information - Financial Information for Partnership's Reportable Segments (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) Advisor	Dec. 31, 2021 USD ($) Advisor	Dec. 31, 2020 USD ($) Advisor
Net revenue
Total net revenue	$ 12,269	$ 12,279	$ 10,063
Net interest and dividends revenue
Total net interest and dividends revenue	372	73	105
Pre-variable income:
Total pre-variable income	3,139	3,554	2,699
Variable compensation:
Total variable compensation	1,735	1,949	1,414
Income (loss) before allocations to partners:
Income before allocations to partners	1,404	1,605	1,285
Capital expenditures:
Total capital expenditures	302	234	129
Depreciation and amortization:
Depreciation and amortization	499	461	443
Total assets at year end:
Total assets	$ 29,892	$ 32,208	$ 28,854
Financial advisors at year end:
Total financial advisors | Advisor	18,796	18,823	19,225
United States [Member]
Net revenue
Total net revenue	$ 11,902	$ 11,946	$ 9,805
Net interest and dividends revenue
Total net interest and dividends revenue	354	69	99
Pre-variable income:
Total pre-variable income	3,057	3,489	2,673
Variable compensation:
Total variable compensation	1,694	1,907	1,385
Income (loss) before allocations to partners:
Income before allocations to partners	1,363	1,582	1,288
Capital expenditures:
Total capital expenditures	298	229	126
Depreciation and amortization:
Depreciation and amortization	483	445	428
Total assets at year end:
Total assets	$ 28,761	$ 31,034	$ 27,776
Financial advisors at year end:
Total financial advisors | Advisor	17,961	17,971	18,321
Canada [Member]
Net revenue
Total net revenue	$ 367	$ 333	$ 258
Net interest and dividends revenue
Total net interest and dividends revenue	18	4	6
Pre-variable income:
Total pre-variable income	82	65	26
Variable compensation:
Total variable compensation	41	42	29
Income (loss) before allocations to partners:
Income before allocations to partners	41	23	(3)
Capital expenditures:
Total capital expenditures	4	5	3
Depreciation and amortization:
Depreciation and amortization	16	16	15
Total assets at year end:
Total assets	$ 1,131	$ 1,174	$ 1,078
Financial advisors at year end:
Total financial advisors | Advisor	835	852	904