v3.26.1
Guarantees - Carrying Value and Maximum Exposure to Loss (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Guarantor Obligations [Line Items]    
Carrying value of obligation $ 351 $ 263
Maximum exposure to loss, Expires in one year or less 204,367 118,441
Maximum exposure to loss, Expires after one year through three years 11,860 13,121
Maximum exposure to loss, Expires after three years through five years 7,802 5,922
Maximum exposure to loss, Expires after five years 9,517 8,144
Maximum exposure to loss 233,546 145,628
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss $ 233,546 145,628
Description of guarantees given by registrant The Parent fully and unconditionally guarantees the payment of principal, interest, and any other amounts that may be due on securities that its 100% owned finance subsidiary, Wells Fargo Finance LLC, may issue.  
Liabilities [1] $ 2,099,878 1,965,593
Written options [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 61,700 45,400
Guarantees Obligations Textual [Abstract]    
Carrying value of obligation (asset) 148 (101)
Maximum exposure for loss 61,700 45,400
Maximum exposure to loss, Expires in three years or less 58,800 42,000
Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 19,389 19,692
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 19,389 19,692
Standby letters of credit [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 103 98
Maximum exposure to loss, Expires in one year or less 16,237 13,967
Maximum exposure to loss, Expires after one year through three years 4,832 6,550
Maximum exposure to loss, Expires after three years through five years 1,998 1,814
Maximum exposure to loss, Expires after five years 59 15
Maximum exposure to loss 23,126 22,346
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 23,126 22,346
Standby letters of credit [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 6,646 7,315
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 6,646 7,315
Direct pay letters of credit [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 4 5
Maximum exposure to loss, Expires in one year or less 624 588
Maximum exposure to loss, Expires after one year through three years 2,211 1,836
Maximum exposure to loss, Expires after three years through five years 619 353
Maximum exposure to loss, Expires after five years 86 88
Maximum exposure to loss 3,540 2,865
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 3,540 2,865
Direct pay letters of credit [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 693 488
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 693 488
Loans and LHFS sold with recourse [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 85 91
Maximum exposure to loss, Expires in one year or less 1,415 1,362
Maximum exposure to loss, Expires after one year through three years 3,622 3,214
Maximum exposure to loss, Expires after three years through five years 3,523 3,385
Maximum exposure to loss, Expires after five years 5,970 6,378
Maximum exposure to loss 14,530 14,339
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 14,530 14,339
Loans and LHFS sold with recourse [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 11,181 10,910
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 11,181 10,910
Exchange and clearing house guarantees [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 0 0
Maximum exposure to loss, Expires in one year or less 181,861 98,106
Maximum exposure to loss, Expires after one year through three years 0 0
Maximum exposure to loss, Expires after three years through five years 0 0
Maximum exposure to loss, Expires after five years 0 0
Maximum exposure to loss 181,861 98,106
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 181,861 98,106
Exchange and clearing house guarantees [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 0 0
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 0 0
Other guarantees and indemnifications [Member]    
Guarantor Obligations [Line Items]    
Carrying value of obligation 159 69
Maximum exposure to loss, Expires in one year or less 4,230 4,418
Maximum exposure to loss, Expires after one year through three years 1,195 1,521
Maximum exposure to loss, Expires after three years through five years 1,662 370
Maximum exposure to loss, Expires after five years 3,402 1,663
Maximum exposure to loss 10,489 7,972
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 10,489 7,972
Other guarantees and indemnifications [Member] | Non-investment grade [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 869 979
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss 869 979
Other commitments and guarantees [Member] | Wells Fargo Finance, LLC [Member]    
Guarantees Obligations Textual [Abstract]    
Liabilities 2,800 $ 1,700
Credit and debit card [Member]    
Guarantor Obligations [Line Items]    
Maximum exposure to loss 322,200  
Guarantees Obligations Textual [Abstract]    
Maximum exposure for loss $ 322,200  
[1] Our consolidated liabilities at June 30, 2026, and December 31, 2025, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Short-term borrowings, $711 million and $0 million; Accrued expenses and other liabilities, $228 million and $206 million; Long-term debt, $5.0 billion and $3.8 billion; and Total liabilities $5.9 billion and $4.0 billion, respectively.