Other Comprehensive Income, Summary of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Debt securities:
Net unrealized gains (losses) arising during the period, Before tax	$ (2,790)	$ (3,373)		$ (2,989)	$ (15,067)
Net unrealized gains (losses) arising during the period, Tax effect	686	829		737	3,709
Net unrealized gains (losses) arising during the period, Net of tax	(2,104)	(2,544)		(2,252)	(11,358)
Reclassification of net (gains) losses to net income, Before tax	152	180		421	242
Reclassification of net (gains) losses to net income, Tax effect	(37)	(44)		(104)	(60)
Reclassification of net (gains) losses to net income, Net of tax	115	136		317	182
Net change, Before tax	(2,638)	(3,193)		(2,568)	(14,825)
Net change, Tax effect	649	785		633	3,649
Net change, Net of tax	(1,989)	(2,408)		(1,935)	(11,176)
Cash Flow Hedges:
Net change, Before tax	(542)	(1,476)		(850)	(1,560)
Net change, Tax effect	135	365		211	386
Net change, Net of tax	(407)	(1,111)		(639)	(1,174)
Defined benefit plans adjustments:
Net actuarial and prior service gains (losses) arising during the period, Before tax	0	(143)		0	(244)
Net actuarial and prior service gains (losses) arising during the period, Tax effect	0	36		0	61
Net actuarial and prior service gains (losses) arising during the period, Net of tax	0	(107)		0	(183)
Reclassification of amounts to noninterest expense, Before tax	27	77		82	243
Reclassification of amounts to noninterest expense, Tax effect	(6)	(19)		(19)	(59)
Reclassification of amounts to noninterest expense, Net of tax	21	58		63	184
Net change, Before tax	27	(66)		82	(1)
Net change, Tax effect	(6)	17		(19)	2
Net change, Net of tax	21	(49)		63	1
Debit valuation adjustment (DVA):
Net unrealized gains (losses) arising during period, Before tax	(13)	12		(22)	125
Net unrealized gains (losses) arising during period, Tax effect	3	(3)		5	(27)
Net unrealized gains (losses) arising during period, Net of tax	(10)	9		(17)	98
Reclassification of net (gains) losses to net income, Before tax	0	0		0	0
Reclassification of net (gains) losses to net income, Tax effect	0	0		0	0
Reclassification of net (gains) losses to net income, Net of tax	0	0		0	0
Net change, Before tax	(13)	12		(22)	125
Net change, Tax effect	3	(3)		5	(27)
Net change, net of tax	(10)	9		(17)	98
Foreign currency translation adjustments:
Net unrealized gains (losses) arising during the period, Before tax	(48)	(174)		17	(301)
Net unrealized gains (losses) arising during the period, Tax effect	(1)	0		(2)	(2)
Net unrealized gains (losses) arising during the period, Net of tax	(49)	(174)		15	(303)
Reclassification of net (gains) losses to net income, Before tax	0	0		0	0
Reclassification of net (gains) losses to net income, Tax	0	0		0	0
Reclassification of net (gains) losses to net income, Net of Tax	0	0		0	0
Net change, Before tax	(48)	(174)		17	(301)
Net change, Tax effect	(1)	0		(2)	(2)
Net change, Net of tax	(49)	(174)		15	(303)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other comprehensive income (loss), Before tax	(3,214)	(4,897)		(3,341)	(16,562)
Other comprehensive income (loss), Tax effect	780	1,164		828	4,008
Other comprehensive income (loss), after tax	(2,434)	(3,733)	[1]	(2,513)	(12,554)	[2]
Noncontrolling interests [Member]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other comprehensive income (loss), after tax	2	2	[1]	2	3	[2]
Total Wells Fargo stockholders' equity [Member]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other comprehensive income (loss), after tax	(2,436)	(3,735)		(2,515)	(12,557)
Fair value hedging [Member]
Fair Value Hedges:
Change in fair value of excluded components on fair value hedges, Before tax	9	30		20	140
Change in fair value of excluded components on fair value hedges, Tax	(2)	(7)		(5)	(34)
Change in fair value of excluded components on fair value hedges, Net of tax	7	23		15	106
Cash flow hedging [Member]
Cash Flow Hedges:
Net unrealized gains (losses) arising during the period on cash flow hedges, Before Tax	(757)	(1,482)		(1,374)	(1,647)
Net unrealized gains (losses) arising during the period on cash flow hedges, Tax	187	366		340	407
Net unrealized gains (losses) arising during the period on cash flow hedges, Net of Tax	(570)	(1,116)		(1,034)	(1,240)
Reclassification of net (gains) losses to net income on cash flow hedges, Before tax	206	(24)		504	(53)
Reclassification of net (gains) losses to net income on cash flow hedges, Tax	(50)	6		(124)	13
Reclassification of net (gains) losses to net income on cash flow hedges, Net of tax	$ 156	$ (18)		$ 380	$ (40)

[1] In first quarter 2023, we adopted ASU 2018-12 – Financial Services – Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. For additional information, see Note 1 (Summary of Significant Accounting Policies).

[2] In first quarter 2023, we adopted ASU 2018-12 – Financial Services – Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. For additional information, see Note 1 (Summary of Significant Accounting Policies).