Other Comprehensive Income, Summary of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt securities:
Net unrealized gains (losses) arising during the period, Before tax	$ (6,888)	$ (2,012)
Net unrealized gains (losses) arising during the period, Tax effect	1,697	500
Net unrealized gains (losses) arising during the period, Net of tax	(5,191)	(1,512)
Net change, Before tax	(6,830)	(2,026)
Net change, Tax effect	1,682	501
Debt securities	(5,148)	(1,525)
Cash Flow Hedges:
Net change, Before tax	27	47
Net change, Tax effect	(7)	(11)
Net change, Net of tax	20	36
Defined benefit plans adjustments:
Net actuarial and prior service gains (losses) arising during the period, Before tax	19	10
Net actuarial and prior service gains (losses) arising during the period, Tax effect	(5)	(3)
Net actuarial and prior service gains (losses) arising during the period, Net of tax	14	7
Reclassification of amounts to noninterest expense, Before tax	76	36
Reclassification of amounts to noninterest expense, Tax effect	(18)	(8)
Reclassification of amounts to noninterest expense, Net of tax	58	28
Net change, Before tax	95	46
Net change, Tax effect	(23)	(11)
Net change, Net of tax	72	35
Debit valuation adjustment (DVA):
Net unrealized gains (losses) arising during period, Before tax	(4)	0
Net unrealized gains (losses) arising during period, Tax effect	1	0
Net unrealized gains (losses) arising during period, Net of tax	(3)	0
Reclassification of net (gains) losses to net income, Before tax	0	0
Reclassification of net (gains) losses to net income, Tax effect	0	0
Reclassification of net (gains) losses to net income, Net of tax	0	0
Net change, Before tax	(4)	0
Net change, Tax effect	1	0
Net change, net of tax	(3)	0
Foreign currency translation adjustments:
Net unrealized gains (losses) arising during the period, Before tax	(6)	13
Net unrealized gains (losses) arising during the period, Tax effect	0	(2)
Net unrealized gains (losses) arising during the period, Net of tax	(6)	11
Reclassification of net (gains) losses to net income, Before tax	0	0
Reclassification of net (gains) losses to net income, Tax	0	0
Reclassification of net (gains) losses to net income, Net of Tax	0	0
Net change, Before tax	(6)	13
Net change, Tax effect	0	(2)
Net change, Net of tax	(6)	11
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other comprehensive income (loss), Before tax	(6,718)	(1,920)
Other comprehensive income (loss), Tax effect	1,653	477
Other comprehensive income (loss), after tax	(5,065)	(1,443)
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	(5,065)	(1,444)
Noncontrolling interests [Member]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Other comprehensive income (loss), after tax	0	1
Debt securities [Member]
Debt securities:
Reclassification of net (gains) losses to net income, Before tax	58	(14)
Reclassification of net (gains) losses to net income, Tax effect	(15)	1
Reclassification of net (gains) losses to net income, Net of tax	43	(13)
Fair value hedging [Member]
Fair Value Hedges:
Change in fair value of excluded components on fair value hedges, Before tax	64	25
Change in fair value of excluded components on fair value hedges, Tax	(16)	(6)
Change in fair value of excluded components on fair value hedges, Net of tax	48	19
Cash flow hedging [Member]
Cash Flow Hedges:
Net unrealized gains (losses) arising during the period on cash flow hedges, Before Tax	(51)	(31)
Net unrealized gains (losses) arising during the period on cash flow hedges, Tax	13	8
Net unrealized gains (losses) arising during the period on cash flow hedges, Net of Tax	(38)	(23)
Reclassification of net (gains) losses to net income on cash flow hedges, Before tax	14	53
Reclassification of net (gains) losses to net income on cash flow hedges, Tax	(4)	(13)
Reclassification of net (gains) losses to net income on cash flow hedges, Net of tax	$ 10	$ 40