Segment Reporting (Segment Reporting Table) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Net interest income	$ 3,264	$ 3,585
Noninterest income	1,881	2,018
Total revenue	5,145	5,603
Provision for (recapture of) credit losses	155	235
Depreciation and amortization	280	281
Other noninterest expense	3,054	3,040
Income (loss) before income taxes (benefit) and noncontrolling interests	1,656	2,047
Income taxes (benefit)	312	353
Net income (loss)	1,344	1,694
Less: Net income (loss) attributable to noncontrolling interests	14	17
Net income (loss) excluding noncontrolling interests	1,330	1,677
Average Assets	562,848	562,332
Retail Banking
Segment Reporting Information [Line Items]
Noninterest income	764	743
Retail Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	2,617	2,281
Noninterest income	764	743
Total revenue	3,381	3,024
Provision for (recapture of) credit losses	118	238
Depreciation and amortization	79	78
Other noninterest expense	1,758	1,849
Income (loss) before income taxes (benefit) and noncontrolling interests	1,426	859
Income taxes (benefit)	333	202
Net income (loss)	1,093	657
Less: Net income (loss) attributable to noncontrolling interests	8	10
Net income (loss) excluding noncontrolling interests	1,085	647
Average Assets	114,199	115,384
Corporate & Institutional Banking
Segment Reporting Information [Line Items]
Noninterest income	888	886
Corporate & Institutional Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	1,520	1,383
Noninterest income	888	886
Total revenue	2,408	2,269
Provision for (recapture of) credit losses	47	(28)
Depreciation and amortization	50	54
Other noninterest expense	872	885
Income (loss) before income taxes (benefit) and noncontrolling interests	1,439	1,358
Income taxes (benefit)	313	294
Net income (loss)	1,126	1,064
Less: Net income (loss) attributable to noncontrolling interests	5	5
Net income (loss) excluding noncontrolling interests	1,121	1,059
Average Assets	228,698	234,536
Asset Management Group
Segment Reporting Information [Line Items]
Noninterest income	230	230
Asset Management Group | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	157	127
Noninterest income	230	230
Total revenue	387	357
Provision for (recapture of) credit losses	(5)	9
Depreciation and amortization	7	6
Other noninterest expense	258	274
Income (loss) before income taxes (benefit) and noncontrolling interests	127	68
Income taxes (benefit)	30	16
Net income (loss)	97	52
Less: Net income (loss) attributable to noncontrolling interests
Net income (loss) excluding noncontrolling interests	97	52
Average Assets	16,728	14,997
Other
Segment Reporting Information [Line Items]
Net interest income	(1,030)	(206)
Noninterest income	(1)	159
Total revenue	(1,031)	(47)
Provision for (recapture of) credit losses	(5)	16
Depreciation and amortization	144	143
Other noninterest expense	166	32
Income (loss) before income taxes (benefit) and noncontrolling interests	(1,336)	(238)
Income taxes (benefit)	(364)	(159)
Net income (loss)	(972)	(79)
Less: Net income (loss) attributable to noncontrolling interests	1	2
Net income (loss) excluding noncontrolling interests	(973)	(81)
Average Assets	$ 203,223	$ 197,415