v2.4.0.6
Employee Benefit Plans (Narratives) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Pre-tax expense associated with the 401(k) plans and profit sharing $ 246 $ 257 $ 196
Accumulated benefit obligation for all defined benefit pension plans 3,858 3,458  
Total assets held under the U.S. qualified plan as a percentage of total pension plan assets 90.00%    
Expense related to defined contribution pension plans 126 136 117
Estimated contributions by employer in next year 50    
Compensation expense 2,250 1,941 1,236
U.S. Qualified Plan
      
Reduction in compensation and benefits expense due to benefit plan amendment     51
Morgan Stanley Medical Plan
      
Reduction in compensation and benefits expense due to benefit plan amendment     4
Pension
      
Estimated net loss that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over 2013 36    
Postretirement
      
Estimated prior-service credit that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over 2013 14    
Estimated net loss that will be amortized from accumulated other comprehensive loss into net periodic benefit cost over 2013 $ 3