Segment Reporting - Schedule of Business Segment Results (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net interest income	$ 13,499	$ 13,916	$ 13,014
Noninterest income	8,056	7,574	8,106
Total revenue	21,555	21,490	21,120
Provision for (recapture of) credit losses	789	742	477
Personnel	7,302	7,428	7,244
Depreciation, amortization and accretion	259	217	651
Total noninterest expense	13,524	14,012	13,170
Income before income taxes and noncontrolling interests	7,242	6,736	7,473
Income taxes	1,289	1,089	1,360
Net income	5,953	5,647	6,113
Less: Net income attributable to noncontrolling interests	64	69	72
Average assets	564,883	558,770	550,652
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	26,345	23,646	20,851
Total noninterest expense	12,368	12,400	12,335
Net income	10,232	8,139	6,246
Average assets	359,852	364,063	348,275
Retail Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	10,933	9,974	7,540
Noninterest income	3,582	2,951	2,967
Total revenue	14,515	12,925	10,507
Provision for (recapture of) credit losses	362	396	259
Personnel	2,189	2,266	2,409
Segment allocations	3,653	3,571	3,394
Depreciation, amortization and accretion	312	330	310
Other	1,377	1,388	1,485
Total noninterest expense	7,531	7,555	7,598
Income before income taxes and noncontrolling interests	6,622	4,974	2,650
Income taxes	1,545	1,163	621
Net income	5,077	3,811	2,029
Less: Net income attributable to noncontrolling interests	39	43	55
Net income	5,038	3,768	1,974
Average assets	114,631	114,914	113,829
Corporate & Institutional Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	6,302	5,732	5,179
Noninterest income	3,927	3,537	3,621
Total revenue	10,229	9,269	8,800
Provision for (recapture of) credit losses	453	398	198
Personnel	1,508	1,426	1,463
Segment allocations	1,497	1,507	1,421
Depreciation, amortization and accretion	202	211	213
Other	557	586	554
Total noninterest expense	3,764	3,730	3,651
Income before income taxes and noncontrolling interests	6,012	5,141	4,951
Income taxes	1,264	1,073	1,064
Net income	4,748	4,068	3,887
Less: Net income attributable to noncontrolling interests	19	19	17
Net income	4,729	4,049	3,870
Average assets	228,349	233,337	219,941
Asset Management Group | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	652	547	608
Noninterest income	949	905	936
Total revenue	1,601	1,452	1,544
Provision for (recapture of) credit losses	(3)	(3)	28
Personnel	472	494	483
Segment allocations	454	464	441
Depreciation, amortization and accretion	30	30	29
Other	117	127	133
Total noninterest expense	1,073	1,115	1,086
Income before income taxes and noncontrolling interests	531	340	430
Income taxes	124	80	100
Net income	407	260	330
Less: Net income attributable to noncontrolling interests
Net income	407	260	330
Average assets	$ 16,872	$ 15,812	$ 14,505