v2.4.0.6
Regulatory Requirements (Significant U.S. Bank Operating Subsidiaries' Capital) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Total capital, amount $ 57,954 [1] $ 54,956 [1]
Tier 1 capital, amount 54,245 [1] 51,114 [1]
Tier 1 leverage capital, amount 0 [1] 0 [1]
Total capital to RWAs, ratio 18.40% [1] 17.50% [1]
Tier 1 capital to RWAs, ratio 17.20% [1] 16.20% [1]
Tier 1 leverage, ratio 7.10% [1] 6.60% [1]
Morgan Stanley Bank, N.A.
    
Total capital, amount 10,769 10,222
Tier 1 capital, amount 9,236 8,703
Tier 1 leverage capital, amount 9,236 8,703
Total capital to RWAs, ratio 16.90% 17.80%
Tier 1 capital to RWAs, ratio 14.50% 15.10%
Tier 1 leverage, ratio 13.60% 13.20%
Morgan Stanley Private Bank, National Association
    
Total capital, amount 1,320 1,278
Tier 1 capital, amount 1,315 1,275
Tier 1 leverage capital, amount $ 1,315 $ 1,275
Total capital to RWAs, ratio 30.00% 31.90%
Tier 1 capital to RWAs, ratio 29.90% 31.80%
Tier 1 leverage, ratio 11.00% 10.20%
[1] The December 31, 2011 deferred tax asset disallowance was adjusted by approximately $1.2 billion, resulting in a reduction to the Company’s Tier 1 common capital, Tier 1 capital, Total capital, RWAs and adjusted average assets by such amount, Tier 1 common capital ratio, Tier 1 capital ratio and Total capital ratio by approximately 30 basis points and Tier 1 leverage ratio by approximately 20 basis points.