v2.4.0.6
Regulatory Requirements (Tables)
 12 Months Ended
Dec. 31, 2012
Regulatory Requirements  
Capital Measures
 December 31, 2012 December 31, 2011
 Balance Ratio Balance Ratio
          
 (dollars in millions)
Tier 1 common capital(1)(2)$ 44,794  14.6% $ 39,785  12.6%
Tier 1 capital(1)  54,360  17.7%   51,114  16.2%
Total capital(1)  56,626  18.5%   54,956  17.5%
RWAs(1)  306,746  —   314,817  —
Adjusted average assets(1)  769,495  —   769,578  —
Tier 1 leverage(1)  —  7.1%   —  6.6%

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(1)       The Company's December 31, 2011 Tier 1 common capital ratio, Tier 1 capital ratio and Total capital ratio were each reduced by approximately 30 basis points, and Tier 1 leverage ratio was reduced by approximately 20 basis points due to an approximate $1.2 billion deferred tax asset disallowance adjustment, which resulted in a reduction to the Company's Tier 1 common capital, Tier 1 capital, Total capital, RWAs and adjusted average assets by such amount.

(2)       Tier 1 common capital ratio equals Tier 1 common capital divided by RWAs. On December 30, 2011, the Federal Reserve formalized regulatory definitions for Tier 1 common capital and Tier 1 common capital ratio. The Federal Reserve defined Tier 1 common capital as Tier 1 capital less non-common elements in Tier 1 capital, including perpetual preferred stock and related surplus, minority interest in subsidiaries, trust preferred securities and mandatory convertible preferred securities. Previously, the Company's definition of Tier 1 common capital included all of the items noted in the Federal Reserve's definition, but it also included an adjustment for the portion of goodwill and non-servicing intangible assets associated with the Wealth Management JV's noncontrolling interests (i.e., Citi's share of the Wealth Management JV's goodwill and intangibles). The Company's conformance to the Federal Reserve's definition under the final rule reduced its Tier 1 common capital and Tier 1 common ratio by approximately $4.2 billion and 132 basis points, respectively, at December 31, 2011.   

 
Capital Information for U.S. Bank Operating Subsidiaries, Which Are U.S. Depository Institutions
   December 31, 2012 December 31, 2011
   Amount Ratio Amount Ratio
          
   (dollars in millions)
Total capital (to RWAs):        
 Morgan Stanley Bank, N.A. $ 11,509 17.2%$ 10,222 17.8%
 Morgan Stanley Private Bank, National Association $ 1,673 28.8%$ 1,278 31.9%
Tier I capital (to RWAs):        
 Morgan Stanley Bank, N.A. $ 9,918 14.9%$ 8,703 15.1%
 Morgan Stanley Private Bank, National Association $ 1,665 28.7%$ 1,275 31.8%
Leverage ratio:        
 Morgan Stanley Bank, N.A. $ 9,918 13.3%$ 8,703 13.2%
 Morgan Stanley Private Bank, National Association $ 1,665 10.6%$ 1,275 10.2%