Segment Reporting (Segment Reporting Table) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Net interest income	$ 3,410	$ 3,418	$ 9,976	$ 10,513
Noninterest income	2,022	1,815	6,012	5,616
Total revenue	5,432	5,233	15,988	16,129
Provision for (recapture of) credit losses	243	129	633	510
Depreciation and amortization	281	285	846	850
Other noninterest expense	3,046	2,960	9,172	9,088
Income (loss) before income taxes (benefit) and noncontrolling interests	1,862	1,859	5,337	5,681
Income taxes (benefit)	357	289	1,011	917
Net income (loss)	1,505	1,570	4,326	4,764
Less: Net income attributable to noncontrolling interests	15	16	47	50
Net income (loss) excluding noncontrolling interests	1,490	1,554	4,279	4,714
Average Assets	569,513	554,963	565,146	557,574
Other
Segment Reporting Information [Line Items]
Net interest income	(1,122)	(687)	(3,253)	(1,305)
Noninterest income	49	(27)	(429)	164
Total revenue	(1,073)	(714)	(3,682)	(1,141)
Provision for (recapture of) credit losses		(11)	(27)	(34)
Depreciation and amortization	147	144	436	430
Other noninterest expense	118	59	483	215
Income (loss) before income taxes (benefit) and noncontrolling interests	(1,338)	(906)	(4,574)	(1,752)
Income taxes (benefit)	(364)	(333)	(1,225)	(750)
Net income (loss)	(974)	(573)	(3,349)	(1,002)
Less: Net income attributable to noncontrolling interests	1		4	3
Net income (loss) excluding noncontrolling interests	(975)	(573)	(3,353)	(1,005)
Average Assets	211,051	193,996	205,215	194,107
Retail Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	2,783	2,576	8,109	7,305
Noninterest income	701	784	2,874	2,229
Total revenue	3,484	3,360	10,983	9,534
Provision for (recapture of) credit losses	111	42	256	266
Depreciation and amortization	78	80	237	239
Other noninterest expense	1,764	1,796	5,283	5,468
Income (loss) before income taxes (benefit) and noncontrolling interests	1,531	1,442	5,207	3,561
Income taxes (benefit)	358	337	1,215	834
Net income (loss)	1,173	1,105	3,992	2,727
Less: Net income attributable to noncontrolling interests	9	11	28	32
Net income (loss) excluding noncontrolling interests	1,164	1,094	3,964	2,695
Average Assets	114,257	114,724	114,522	114,975
Corporate & Institutional Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	1,588	1,390	4,639	4,122
Noninterest income	1,030	835	2,860	2,542
Total revenue	2,618	2,225	7,499	6,664
Provision for (recapture of) credit losses	134	102	409	283
Depreciation and amortization	50	52	151	159
Other noninterest expense	900	843	2,632	2,596
Income (loss) before income taxes (benefit) and noncontrolling interests	1,534	1,228	4,307	3,626
Income taxes (benefit)	332	263	928	775
Net income (loss)	1,202	965	3,379	2,851
Less: Net income attributable to noncontrolling interests	5	5	15	15
Net income (loss) excluding noncontrolling interests	1,197	960	3,364	2,836
Average Assets	227,277	230,082	228,518	232,914
Asset Management Group | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	161	139	481	391
Noninterest income	242	223	707	681
Total revenue	403	362	1,188	1,072
Provision for (recapture of) credit losses	(2)	(4)	(5)	(5)
Depreciation and amortization	6	9	22	22
Other noninterest expense	264	262	774	809
Income (loss) before income taxes (benefit) and noncontrolling interests	135	95	397	246
Income taxes (benefit)	31	22	93	58
Net income (loss)	104	73	304	188
Less: Net income attributable to noncontrolling interests
Net income (loss) excluding noncontrolling interests	104	73	304	188
Average Assets	$ 16,928	$ 16,161	$ 16,891	$ 15,578