Regulatory and Agency Capital Requirements (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Parent Company [Member]
Supplementary leverage:
Total Leverage Exposure	$ 2,202,607	$ 2,174,564
Supplementary Leverage Ratio	7.75%	7.72%
Parent Company [Member] | Advanced Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 149,183	$ 146,363
Tier 1	170,675	167,866
Total	200,810	198,798
Assets:
Risk-weighted assets	1,182,838	1,177,350
Adjusted average	$ 1,871,806	$ 1,850,299
Regulatory capital ratios:
Common equity tier 1 capital	12.61%	12.43%
Tier 1 capital	14.43%	14.26%
Total capital	16.98%	16.89%
Tier 1 leverage	9.12%	9.07%
Parent Company [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 149,183	$ 146,363
Tier 1	170,675	167,866
Total	208,817	207,041
Assets:
Risk-weighted assets	1,246,683	1,247,210
Adjusted average	$ 1,871,806	$ 1,850,299
Regulatory capital ratios:
Common equity tier 1 capital	11.97%	11.74%
Tier 1 capital	13.69%	13.46%
Total capital	16.75%	16.60%
Tier 1 leverage	9.12%	9.07%
Wells Fargo Bank, NA [Member]
Supplementary leverage:
Total Leverage Exposure	$ 1,964,107	$ 1,957,276
Supplementary Leverage Ratio	7.46%	7.29%
Wells Fargo Bank, NA [Member] | Advanced Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 146,505	$ 142,685
Tier 1	146,505	142,685
Total	159,090	155,558
Assets:
Risk-weighted assets	1,059,642	1,058,653
Adjusted average	$ 1,654,994	$ 1,652,009
Regulatory capital ratios:
Common equity tier 1 capital	13.83%	13.48%
Tier 1 capital	13.83%	13.48%
Total capital	15.01%	14.69%
Tier 1 leverage	8.85%	8.64%
Wells Fargo Bank, NA [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 146,505	$ 142,685
Tier 1	146,505	142,685
Total	166,648	163,380
Assets:
Risk-weighted assets	1,144,959	1,154,182
Adjusted average	$ 1,654,994	$ 1,652,009
Regulatory capital ratios:
Common equity tier 1 capital	12.80%	12.36%
Tier 1 capital	12.80%	12.36%
Total capital	14.56%	14.16%
Tier 1 leverage	8.85%	8.64%