Regulatory Capital Requirements and Other Restrictions, Regulatory Capital Information (Details) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Wells Fargo & Company [Member]
Regulatory leverage:
Total leverage exposure	$ 2,569,772	$ 2,466,623
Supplementary leverage ratio (SLR)	0.0585	0.0623
Tier 1 leverage ratio	0.0703	0.0748
Required minimum leverage
Supplementary leverage ratio	0.0350	0.0500
Tier 1 leverage ratio	0.0400	0.0400
Wells Fargo & Company [Member] \| Standardized Approach Under Basel III [Member]
Regulatory capital:
Common Equity Tier 1	$ 135,442	$ 137,346
Tier 1	150,430	153,567
Total	181,754	184,682
Assets:
Risk-weighted assets	1,315,968	1,294,609
Adjusted average assets	$ 2,139,900	$ 2,052,117
Regulatory capital ratios:
Common Equity Tier 1 capital	0.1029	0.1061
Tier 1 capital	0.1143	0.1186
Total capital	0.1381	0.1427
Required minimum capital ratios:
Common Equity Tier 1 Capital	0.0850	0.0850
Tier 1 capital	0.1000	0.1000
Total capital	0.1200	0.1200
Wells Fargo & Company [Member] \| Advanced Approach Under Basel III [Member]
Regulatory capital:
Common Equity Tier 1	$ 135,442	$ 137,346
Tier 1	150,430	153,567
Total	171,741	174,617
Assets:
Risk-weighted assets	1,121,045	1,112,533
Adjusted average assets	$ 2,139,900	$ 2,052,117
Regulatory capital ratios:
Common Equity Tier 1 capital	0.1208	0.1235
Tier 1 capital	0.1342	0.1380
Total capital	0.1532	0.1570
Required minimum capital ratios:
Common Equity Tier 1 Capital	0.0850	0.0850
Tier 1 capital	0.1000	0.1000
Total capital	0.1200	0.1200
Wells Fargo Bank, NA [Member]
Regulatory leverage:
Total leverage exposure	$ 2,213,313	$ 2,141,519
Supplementary leverage ratio (SLR)	0.0684	0.0709
Tier 1 leverage ratio	0.0840	0.0869
Required minimum leverage
Supplementary leverage ratio	0.0350	0.0600
Tier 1 leverage ratio	0.0500	0.0500
Wells Fargo Bank, NA [Member] \| Standardized Approach Under Basel III [Member]
Regulatory capital:
Common Equity Tier 1	$ 151,450	$ 151,833
Tier 1	151,450	151,833
Total	169,159	169,520
Assets:
Risk-weighted assets	1,203,547	1,184,912
Adjusted average assets	$ 1,802,901	$ 1,746,906
Regulatory capital ratios:
Common Equity Tier 1 capital	0.1258	0.1281
Tier 1 capital	0.1258	0.1281
Total capital	0.1406	0.1431
Required minimum capital ratios:
Common Equity Tier 1 Capital	0.0700	0.0700
Tier 1 capital	0.0850	0.0850
Total capital	0.1050	0.1050
Wells Fargo Bank, NA [Member] \| Advanced Approach Under Basel III [Member]
Regulatory capital:
Common Equity Tier 1	$ 151,450	$ 151,833
Tier 1	151,450	151,833
Total	158,658	158,966
Assets:
Risk-weighted assets	943,876	940,876
Adjusted average assets	$ 1,802,901	$ 1,746,906
Regulatory capital ratios:
Common Equity Tier 1 capital	0.1605	0.1614
Tier 1 capital	0.1605	0.1614
Total capital	0.1681	0.1690
Required minimum capital ratios:
Common Equity Tier 1 Capital	0.0700	0.0700
Tier 1 capital	0.0850	0.0850
Total capital	0.1050	0.1050

Ratio of minimum Common Equity Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio of minimum Tier 1 risk-based capital to total leverage exposure categorized as well capitalized as defined by regulatory framework for prompt corrective action.