Segment Reporting (Segment Reporting Table) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Net interest income	$ 2,581	$ 2,527	$ 4,929	$ 5,038
Noninterest income	2,086	1,549	3,958	3,374
Total revenue	4,667	4,076	8,887	8,412
Provision for (recapture of) credit losses	302	2,463	(249)	3,377
Depreciation and amortization	256	251	490	491
Other noninterest expense	2,794	2,264	5,134	4,567
Income (loss) from continuing operations before income taxes and noncontrolling interests	1,315	(902)	3,512	(23)
Income taxes (benefit)	212	(158)	583	(38)
Net income (loss) from continuing operations	1,103	(744)	2,929	15
Less: Net income attributable to noncontrolling interests	12	7	22	14
Net income (loss) from continuing operations excluding noncontrolling interests	1,091	(751)	2,907	1
Average Assets	504,429	457,313	486,425	434,874
Retail Banking
Segment Reporting Information [Line Items]
Net interest income			2,859	2,846
Noninterest income	706	585	1,360	1,373
Total revenue			4,219	4,219
Provision for (recapture of) credit losses			(43)	1,206
Depreciation and amortization			136	124
Other noninterest expense			3,017	2,901
Income (loss) from continuing operations before income taxes and noncontrolling interests			1,109	(12)
Average Assets			96,942	99,583
Retail Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	1,497	1,390
Noninterest income	706	585
Total revenue	2,203	1,975
Provision for (recapture of) credit losses	214	761
Depreciation and amortization	73	67
Other noninterest expense	1,604	1,430
Income (loss) from continuing operations before income taxes and noncontrolling interests	312	(283)
Income taxes (benefit)	73	(63)	256	(1)
Net income (loss) from continuing operations	239	(220)	853	(11)
Less: Net income attributable to noncontrolling interests	7	3	14	11
Net income (loss) from continuing operations excluding noncontrolling interests	232	(223)	839	(22)
Average Assets	100,948	102,103
Corporate & Institutional Banking
Segment Reporting Information [Line Items]
Net interest income			2,074	2,002
Noninterest income	867	726	1,674	1,420
Total revenue			3,748	3,422
Provision for (recapture of) credit losses			(178)	2,043
Depreciation and amortization			98	99
Other noninterest expense			1,426	1,293
Income (loss) from continuing operations before income taxes and noncontrolling interests			2,402	(13)
Average Assets			176,182	185,878
Corporate & Institutional Banking | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	1,083	1,052
Noninterest income	867	726
Total revenue	1,950	1,778
Provision for (recapture of) credit losses	104	1,585
Depreciation and amortization	51	51
Other noninterest expense	762	619
Income (loss) from continuing operations before income taxes and noncontrolling interests	1,033	(477)
Income taxes (benefit)	220	(122)	528	(28)
Net income (loss) from continuing operations	813	(355)	1,874	15
Less: Net income attributable to noncontrolling interests	4	3	7	3
Net income (loss) from continuing operations excluding noncontrolling interests	809	(358)	1,867	12
Average Assets	181,770	199,254
Asset Management Group
Segment Reporting Information [Line Items]
Net interest income			205	177
Noninterest income	244	204	473	408
Total revenue			678	585
Provision for (recapture of) credit losses			14	42
Depreciation and amortization			9	23
Other noninterest expense			412	413
Income (loss) from continuing operations before income taxes and noncontrolling interests			243	107
Average Assets			9,761	7,880
Asset Management Group | Operating Segments
Segment Reporting Information [Line Items]
Net interest income	112	89
Noninterest income	244	204
Total revenue	356	293
Provision for (recapture of) credit losses	23	39
Depreciation and amortization	5	12
Other noninterest expense	214	205
Income (loss) from continuing operations before income taxes and noncontrolling interests	114	37
Income taxes (benefit)	27	9	57	25
Net income (loss) from continuing operations	87	28	186	82
Less: Net income attributable to noncontrolling interests
Net income (loss) from continuing operations excluding noncontrolling interests	87	28	186	82
Average Assets	10,640	7,958
Other
Segment Reporting Information [Line Items]
Net interest income	(111)	(4)	(209)	13
Noninterest income	269	34	451	173
Total revenue	158	30	242	186
Provision for (recapture of) credit losses	(39)	78	(42)	86
Depreciation and amortization	127	121	247	245
Other noninterest expense	214	10	279	(40)
Income (loss) from continuing operations before income taxes and noncontrolling interests	(144)	(179)	(242)	(105)
Income taxes (benefit)	(108)	18	(258)	(34)
Net income (loss) from continuing operations	(36)	(197)	16	(71)
Less: Net income attributable to noncontrolling interests	1	1	1
Net income (loss) from continuing operations excluding noncontrolling interests	(37)	(198)	15	(71)
Average Assets	$ 211,071	$ 147,998	$ 203,540	$ 141,533