Earnings and Dividends Per Common Share, Calculation of Earnings and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Common Share [Abstract]
Wells Fargo net income	$ 6,206	$ 5,186	$ 12,066	$ 10,322
Less: Preferred stock dividends and other	358	394	711	797
Wells Fargo net income applicable to common stock (numerator)	$ 5,848	$ 4,792	$ 11,355	$ 9,525
Earnings per common share
Average common shares outstanding (denominator)	4,469.4	4,865.8	4,510.2	4,875.7
Per share	$ 1.31	$ 0.98	$ 2.52	$ 1.95
Diluted earnings per common share
Average common shares outstanding (in shares)	4,469.4	4,865.8	4,510.2	4,875.7
Diluted average common shares outstanding (denominator)	4,495.0	4,899.8	4,540.1	4,916.1
Per share	$ 1.30	$ 0.98	$ 2.50	$ 1.94
Stock Option [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	0.1	8.2	1.4	9.0
Restricted Share Rights [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	25.5	20.7	28.5	25.4
Warrants [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	0.0	5.1	0.0	6.0