Segment Information - Financial Information for Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Revenues
Net interest revenue	$ 2,222	$ 2,237	$ 6,613	$ 7,297
Total net revenues	4,847	4,606	14,277	14,378
Expenses Excluding Interest	3,005	3,223	8,890	9,194
Income before taxes on income	1,842	1,383	5,387	5,184
Asset management and administration fees
Net Revenues
Revenues from contracts with customers	1,476	1,224	4,207	3,515
Trading revenue
Net Revenues
Revenues from contracts with customers	797	768	2,391	2,463
Bank deposit account fees
Net Revenues
Revenues from contracts with customers	152	205	488	531
Other
Net Revenues
Revenues from contracts with customers	200	172	578	572
Investor Services
Net Revenues
Net interest revenue	1,755	1,710	5,212	5,448
Total net revenues	3,787	3,560	11,113	10,966
Expenses Excluding Interest	2,262	2,356	6,758	6,780
Income before taxes on income	1,525	1,204	4,355	4,186
Investor Services | Asset management and administration fees
Net Revenues
Revenues from contracts with customers	1,046	877	2,966	2,523
Investor Services | Trading revenue
Net Revenues
Revenues from contracts with customers	706	672	2,104	2,148
Investor Services | Bank deposit account fees
Net Revenues
Revenues from contracts with customers	114	157	362	396
Investor Services | Other
Net Revenues
Revenues from contracts with customers	166	144	469	451
Advisor Services
Net Revenues
Net interest revenue	467	527	1,401	1,849
Total net revenues	1,060	1,046	3,164	3,412
Expenses Excluding Interest	743	867	2,132	2,414
Income before taxes on income	317	179	1,032	998
Advisor Services | Asset management and administration fees
Net Revenues
Revenues from contracts with customers	430	347	1,241	992
Advisor Services | Trading revenue
Net Revenues
Revenues from contracts with customers	91	96	287	315
Advisor Services | Bank deposit account fees
Net Revenues
Revenues from contracts with customers	38	48	126	135
Advisor Services | Other
Net Revenues
Revenues from contracts with customers	$ 34	$ 28	$ 109	$ 121