v2.4.0.6
Regulatory and Agency Capital Requirements (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2012
Dec. 31, 2011
Regulatory And Agency Capital Requirements [Abstract]    
Tier 1 capital ratio required to be well capitalized 6.00% 6.00%
Total capital ratio required to be well capitalized 10.00% 10.00%
Tier 1 leverage capital ratio required to be well capitalized 5.00% 5.00%
Tier 1 capital ratio required for capital adequacy purposes 4.00% 4.00%
Total capital ratio required for capital adequacy purposes 8.00% 8.00%
Tier 1 leverage capital ratio required for capital adequacy purposes 4.00% 4.00%
Regulatory and Agency Capital Requirements (Textual) [Abstract]    
Trust preferred and perpetual preferred purchase securities included in Tier 1 capital $ 6,600,000,000  
Minimum leverage ratio for banking organizations 3.00%  
Trust Preferred Securities [Member]
    
Regulatory and Agency Capital Requirements (Textual) [Abstract]    
Trust preferred securities redeemed 875,000,000  
Wells Fargo & Company [Member]
    
Regulatory And Agency Capital Requirements [Abstract]    
Tier 1 capital, amounts 117,400,000,000 114,000,000,000
Total capital, amounts 150,800,000,000 148,500,000,000
Risk Weighted Assets 996,800,000,000 1,005,600,000,000
Adjusted Average Assets 1,256,600,000,000 1,262,600,000,000
Tier 1 capital ratio 11.78% 11.33%
Total capital ratio 15.13% 14.76%
Tier 1 leverage capital ratio 9.35% 9.03%
Wells Fargo Bank, NA [Member]
    
Regulatory And Agency Capital Requirements [Abstract]    
Tier 1 capital, amounts 93,300,000,000 92,600,000,000
Total capital, amounts 117,800,000,000 117,900,000,000
Risk Weighted Assets 921,200,000,000 923,200,000,000
Adjusted Average Assets $ 1,116,700,000,000 $ 1,115,400,000,000
Tier 1 capital ratio 10.13% 10.03%
Total capital ratio 12.79% 12.77%
Tier 1 leverage capital ratio 8.36% 8.30%