v2.4.0.8
Regulatory and Agency Capital Requirements (Details) (USD $)
In Billions, unless otherwise specified
3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Mar. 31, 2013
Basel I [Member]
Mar. 31, 2013
Basel III [Member]
Jun. 30, 2013
Trust Preferred Securities [Member]
Jun. 30, 2013
Wells Fargo & Company [Member]
Dec. 31, 2012
Wells Fargo & Company [Member]
Jun. 30, 2013
Wells Fargo Bank, NA [Member]
Dec. 31, 2012
Wells Fargo Bank, NA [Member]
Regulatory And Agency Capital Requirements [Abstract]                  
Tier 1 capital, amounts           $ 133.0 $ 126.6 $ 109.6 $ 101.3
Total capital, amounts           165.0 157.6 136.4 124.8
Risk Weighted Assets           1,097.4 1,077.1 1,012.3 1,002.0
Adjusted Average Assets           1,381.3 1,336.4 1,236.9 1,195.9
Tier 1 capital ratio           12.12% 11.75% 10.83% 10.11%
Total capital ratio           15.03% 14.63% 13.48% 12.45%
Tier 1 leverage capital ratio           9.63% 9.47% 8.86% 8.47%
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 2.1                
Minimum leverage ratio for banking organizations 3.00%                
Trust preferred securities redeemed         $ 2.8        
Impact on capital ratios from implementation of market risk capital rule     0.25% 0.00%