Regulatory and Agency Capital Requirements (Details) - USD ($) $ in Billions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Regulatory and Agency Capital Requirements (Textual) [Abstract]
Minimum leverage ratio for banking organizations	3.00%
Advance Approach Under Basel III [Member]
Regulatory capital ratios:
Tier 1 common equity ratio required for capital adequacy purposes	4.50%
Tier 1 capital ratio required for capital adequacy purposes	6.00%
Total capital ratio required for capital adequacy purposes	8.00%
Tier 1 leverage capital ratio required for capital adequacy purposes	4.00%
Standardized Approach Under Basel III [Member]
Regulatory capital ratios:
Tier 1 common equity ratio required for capital adequacy purposes	4.50%
Tier 1 capital ratio required for capital adequacy purposes	6.00%
Total capital ratio required for capital adequacy purposes	8.00%
Tier 1 leverage capital ratio required for capital adequacy purposes	4.00%
General Approach Under Basel III [Member]
Regulatory capital ratios:
Tier 1 common equity ratio required for capital adequacy purposes		4.50%
Tier 1 capital ratio required for capital adequacy purposes		4.00%
Total capital ratio required for capital adequacy purposes		8.00%
Tier 1 leverage capital ratio required for capital adequacy purposes		4.00%
Wells Fargo & Company [Member] | Advance Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 140.9
Tier 1	160.4
Total	187.4
Assets:
Risk-weighted	1,297.1
Adjusted average	$ 1,697.5
Regulatory capital ratios:
Common equity tier 1 capital	10.86%
Tier 1 capital	12.37%
Total capital	14.45%
Tier 1 leverage	9.45%
Wells Fargo & Company [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 140.9
Tier 1	160.4
Total	198.0
Assets:
Risk-weighted	1,306.1
Adjusted average	$ 1,697.4
Regulatory capital ratios:
Common equity tier 1 capital	10.78%
Tier 1 capital	12.28%
Total capital	15.16%
Tier 1 leverage	9.45%
Wells Fargo & Company [Member] | General Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1		$ 137.1
Tier 1		154.7
Total		192.9
Assets:
Risk-weighted		1,242.5
Adjusted average		$ 1,637.0
Regulatory capital ratios:
Common equity tier 1 capital		11.04%
Tier 1 capital		12.45%
Total capital		15.53%
Tier 1 leverage		9.45%
Wells Fargo Bank, NA [Member] | Advance Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 122.9
Tier 1	122.9
Total	136.7
Assets:
Risk-weighted	1,118.0
Adjusted average	$ 1,535.8
Regulatory capital ratios:
Common equity tier 1 capital	10.99%
Tier 1 capital	10.99%
Total capital	12.23%
Tier 1 leverage	8.00%
Wells Fargo Bank, NA [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 122.9
Tier 1	122.9
Total	146.2
Assets:
Risk-weighted	1,192.0
Adjusted average	$ 1,535.8
Regulatory capital ratios:
Common equity tier 1 capital	10.31%
Tier 1 capital	10.31%
Total capital	12.26%
Tier 1 leverage	8.00%
Wells Fargo Bank, NA [Member] | General Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1		$ 119.9
Tier 1		119.9
Total		144.0
Assets:
Risk-weighted		1,142.5
Adjusted average		$ 1,487.6
Regulatory capital ratios:
Common equity tier 1 capital		10.49%
Tier 1 capital		10.49%
Total capital		12.61%
Tier 1 leverage		8.06%