Segment Reporting (Segment Reporting Table) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Net interest income	$ 3,418	$ 3,475	$ 10,513	$ 9,330
Noninterest income	1,815	2,074	5,616	6,027
Total revenue	5,233	5,549	16,129	15,357
Provision for (recapture of) credit losses	129	241	510	69
Depreciation and amortization	285	277	850	843
Other noninterest expense	2,960	3,003	9,088	8,853
Income (loss) before income taxes (benefit) and noncontrolling interests	1,859	2,028	5,681	5,592
Income taxes (benefit)	289	388	917	1,027
Net income (loss)	1,570	1,640	4,764	4,565
Less: Net income (loss) attributable to noncontrolling interests	16	16	50	52
Net income (loss) excluding noncontrolling interests	1,554	1,624	4,714	4,513
Average Assets	554,963	547,097	557,574	548,443
Retail Banking
Segment Reporting Information [Line Items]
Noninterest income	784	725	2,229	2,218
Retail Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	2,576	2,017	7,305	5,210
Noninterest income	784	725	2,229	2,218
Total revenue	3,360	2,742	9,534	7,428
Provision for (recapture of) credit losses	42	92	266	66
Depreciation and amortization	80	76	239	233
Other noninterest expense	1,796	1,825	5,468	5,473
Income (loss) before income taxes (benefit) and noncontrolling interests	1,442	749	3,561	1,656
Income taxes (benefit)	337	175	834	389
Net income (loss)	1,105	574	2,727	1,267
Less: Net income (loss) attributable to noncontrolling interests	11	14	32	45
Net income (loss) excluding noncontrolling interests	1,094	560	2,695	1,222
Average Assets	114,724	114,619	114,975	113,157
Corporate & Institutional Banking
Segment Reporting Information [Line Items]
Noninterest income	835	887	2,542	2,659
Corporate & Institutional Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	1,390	1,345	4,122	3,720
Noninterest income	835	887	2,542	2,659
Total revenue	2,225	2,232	6,664	6,379
Provision for (recapture of) credit losses	102	150	283	15
Depreciation and amortization	52	50	159	153
Other noninterest expense	843	840	2,596	2,508
Income (loss) before income taxes (benefit) and noncontrolling interests	1,228	1,192	3,626	3,703
Income taxes (benefit)	263	258	775	803
Net income (loss)	965	934	2,851	2,900
Less: Net income (loss) attributable to noncontrolling interests	5	5	15	12
Net income (loss) excluding noncontrolling interests	960	929	2,836	2,888
Average Assets	230,082	224,984	232,914	215,163
Asset Management Group
Segment Reporting Information [Line Items]
Noninterest income	223	231	681	713
Asset Management Group | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	139	165	391	456
Noninterest income	223	231	681	713
Total revenue	362	396	1,072	1,169
Provision for (recapture of) credit losses	(4)	4	(5)	11
Depreciation and amortization	9	6	22	20
Other noninterest expense	262	268	809	775
Income (loss) before income taxes (benefit) and noncontrolling interests	95	118	246	363
Income taxes (benefit)	22	28	58	85
Net income (loss)	73	90	188	278
Less: Net income (loss) attributable to noncontrolling interests
Net income (loss) excluding noncontrolling interests	73	90	188	278
Average Assets	16,161	14,820	15,578	14,360
Other
Segment Reporting Information [Line Items]
Net interest income	(687)	(52)	(1,305)	(56)
Noninterest income	(27)	231	164	437
Total revenue	(714)	179	(1,141)	381
Provision for (recapture of) credit losses	(11)	(5)	(34)	(23)
Depreciation and amortization	144	145	430	437
Other noninterest expense	59	70	215	97
Income (loss) before income taxes (benefit) and noncontrolling interests	(906)	(31)	(1,752)	(130)
Income taxes (benefit)	(333)	(73)	(750)	(250)
Net income (loss)	(573)	42	(1,002)	120
Less: Net income (loss) attributable to noncontrolling interests		(3)	3	(5)
Net income (loss) excluding noncontrolling interests	(573)	45	(1,005)	125
Average Assets	$ 193,996	$ 192,674	$ 194,107	$ 205,763