Operating Segments (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable operating segments | segment			3
Financial Information of Operating Segment [Abstract]
Net interest income	$ 12,095	$ 12,541	$ 24,406	$ 24,779
Provision (reversal of provision) for credit losses	503	452	1,348	643
Noninterest income	9,489	9,012	18,787	18,708
Noninterest expense	13,449	13,982	27,365	29,024
Income before income tax expense	7,632	7,119	14,480	13,820
Income tax expense (benefit)	1,294	1,810	2,175	3,184
Net income before noncontrolling interests	6,338	5,309	12,305	10,636
Less: Net income from noncontrolling interests	132	123	239	314
Wells Fargo net income	6,206	5,186	12,066	10,322
Average loans	947,500	944,100	948,700	947,500
Average assets	1,900,600	1,884,900	1,891,900	1,900,300
Average Deposits	1,269,000	1,271,300	1,265,500	1,284,200
Other [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	(543)	(609)	(1,115)	(1,210)
Provision (reversal of provision) for credit losses	(3)	6	(6)	5
Noninterest income	(793)	(792)	(1,552)	(1,608)
Noninterest expense	(891)	(888)	(1,805)	(1,816)
Income before income tax expense	(442)	(519)	(856)	(1,007)
Income tax expense (benefit)	(110)	(129)	(214)	(251)
Net income before noncontrolling interests	(332)	(390)	(642)	(756)
Less: Net income from noncontrolling interests	0	0	0	0
Wells Fargo net income	(332)	(390)	(642)	(756)
Average loans	(59,200)	(59,100)	(59,100)	(58,800)
Average assets	(60,200)	(59,800)	(60,100)	(59,600)
Average Deposits	(62,500)	(70,400)	(64,500)	(72,300)
Community Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	7,066	7,346	14,314	14,541
Provision (reversal of provision) for credit losses	479	484	1,189	702
Noninterest income	4,739	4,460	9,241	9,095
Noninterest expense	7,212	7,290	14,901	15,992
Income before income tax expense	4,114	4,032	7,465	6,942
Income tax expense (benefit)	838	1,413	1,262	2,222
Net income before noncontrolling interests	3,276	2,619	6,203	4,720
Less: Net income from noncontrolling interests	129	123	233	311
Wells Fargo net income	3,147	2,496	5,970	4,409
Average loans	457,700	463,800	457,900	467,100
Average assets	1,024,800	1,034,300	1,020,100	1,048,000
Average Deposits	777,600	760,600	771,600	754,100
Wholesale Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	4,535	4,693	9,069	9,225
Provision (reversal of provision) for credit losses	28	(36)	162	(56)
Noninterest income	2,530	2,504	5,107	5,251
Noninterest expense	3,882	4,219	7,720	8,197
Income before income tax expense	3,155	3,014	6,294	6,335
Income tax expense (benefit)	365	379	734	827
Net income before noncontrolling interests	2,790	2,635	5,560	5,508
Less: Net income from noncontrolling interests	1	0	1	(2)
Wells Fargo net income	2,789	2,635	5,559	5,510
Average loans	474,000	464,700	475,200	464,900
Average assets	852,200	826,400	848,400	827,800
Average Deposits	410,400	414,000	410,100	429,900
Wealth and Investment Management [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	1,037	1,111	2,138	2,223
Provision (reversal of provision) for credit losses	(1)	(2)	3	(8)
Noninterest income	3,013	2,840	5,991	5,970
Noninterest expense	3,246	3,361	6,549	6,651
Income before income tax expense	805	592	1,577	1,550
Income tax expense (benefit)	201	147	393	386
Net income before noncontrolling interests	604	445	1,184	1,164
Less: Net income from noncontrolling interests	2	0	5	5
Wells Fargo net income	602	445	1,179	1,159
Average loans	75,000	74,700	74,700	74,300
Average assets	83,800	84,000	83,500	84,100
Average Deposits	$ 143,500	$ 167,100	$ 148,300	$ 172,500