Regulatory and Agency Capital Requirements Minimum Required Regulatory Capital Ratios – Transition Requirements (Details)	Mar. 31, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer, minimum	0.02500
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	9.00%	9.00%
Tier 1 capital	10.50%	10.50%
Total capital	12.50%	12.50%
Tier 1 leverage	4.00%	4.00%
Supplementary leverage	5.00%	5.00%
Capital conservation buffer, minimum	0.02500
Banking Regulation, Global Systemically Important Bank (GSIB) Surcharge	0.02000
Leverage buffer, minimum	0.02000
Supplementary leverage ratio, minimum	0.03000
Wells Fargo Bank, NA [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital	7.00%	7.00%
Tier 1 capital	8.50%	8.50%
Total capital	10.50%	10.50%
Tier 1 leverage	4.00%	4.00%
Supplementary leverage	6.00%	6.00%
Capital conservation buffer, minimum	0.02500

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

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The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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Minimum capital conservation buffer percentage required to avoid restriction on payout amount of eligible retained income as defined by regulatory framework.

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Global systemically important bank (GSIB) surcharge percentage as defined by regulatory framework.

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Minimum leverage buffer percentage as defined by regulatory framework.

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Ratio of minimum Tier 1 risk-based capital to total leverage exposure required for capital adequacy as defined by regulatory framework.

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The minimum amount of Tier 1 enhanced supplemental Leverage Capital for well capitalized purposes divided by leverage exposure as defined in the regulations.

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The minimum Tier One Common Equity Ratio (Tier one common equity divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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