Regulatory and Agency Capital Requirements (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Wells Fargo & Company [Member] | Advanced Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 152,742	$ 148,785
Tier 1	176,134	171,364
Total	208,535	204,425
Assets:
Risk-weighted	1,232,977	1,274,589
Adjusted average	$ 1,897,370	$ 1,914,802
Regulatory capital ratios:
Common equity tier 1 capital	12.39%	11.67%
Tier 1 capital	14.29%	13.44%
Total capital	16.91%	16.04%
Tier 1 leverage	9.28%	8.95%
Wells Fargo & Company [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 152,742	$ 148,785
Tier 1	176,134	171,364
Total	218,399	214,877
Assets:
Risk-weighted	1,287,327	1,336,198
Adjusted average	$ 1,897,370	$ 1,914,802
Regulatory capital ratios:
Common equity tier 1 capital	11.87%	11.13%
Tier 1 capital	13.68%	12.82%
Total capital	16.97%	16.08%
Tier 1 leverage	9.28%	8.95%
Wells Fargo Bank, NA [Member] | Advanced Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 139,581	$ 132,225
Tier 1	139,581	132,225
Total	152,850	145,665
Assets:
Risk-weighted	1,114,978	1,143,681
Adjusted average	$ 1,703,737	$ 1,714,524
Regulatory capital ratios:
Common equity tier 1 capital	12.52%	11.56%
Tier 1 capital	12.52%	11.56%
Total capital	13.71%	12.74%
Tier 1 leverage	8.19%	7.71%
Wells Fargo Bank, NA [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 139,581	$ 132,225
Tier 1	139,581	132,225
Total	162,320	155,281
Assets:
Risk-weighted	1,188,024	1,222,876
Adjusted average	$ 1,703,737	$ 1,714,524
Regulatory capital ratios:
Common equity tier 1 capital	11.75%	10.81%
Tier 1 capital	11.75%	10.81%
Total capital	13.66%	12.70%
Tier 1 leverage	8.19%	7.71%