Quarterly report pursuant to Section 13 or 15(d)

Pension and Postretirement Plans (Details)

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Pension and Postretirement Plans (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
        
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Restricted stock units authorized to be converted to common stock upon vesting (shares) 2   2  
Key Associate Stock Plan [Member]
        
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Share-based compensation, restricted stock units granted (shares)     183  
Qualified Pension Plans [Member]
        
Net Periodic benefit cost (income)        
Service cost $ 0 $ 117 $ 0 $ 231
Interest cost 151 169 302 341
Expected return on plan assets (252) (312) (505) (621)
Amortization of transition obligation   0   0
Amortization of prior service cost (credits) 0 4 0 9
Amortization of net actuarial loss (gain) 70 115 141 238
Recognized loss due to settlements and curtailments   0 17 58
Net periodic benefit cost (income) (31) 93 (45) 256
Nonqualified and Other Pension Plans [Member]
        
Net Periodic benefit cost (income)        
Service cost 1 [1] 0 [1] 1 [1] 0 [1]
Interest cost 29 [1] 35 [1] 59 [1] 70 [1]
Expected return on plan assets (28) [1] (38) [1] (55) [1] (76) [1]
Amortization of transition obligation   0 [1]   0 [1]
Amortization of prior service cost (credits) 0 [1] (2) [1] 0 [1] (4) [1]
Amortization of net actuarial loss (gain) 6 [1] 2 [1] 12 [1] 5 [1]
Recognized loss due to settlements and curtailments   1 [1] 0 [1] 4 [1]
Net periodic benefit cost (income) 8 [1] (2) [1] 17 [1] (1) [1]
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Estimated future employer contributions in current fiscal year     103  
Contribution made under group annuity contract     59  
Postretirement Health and Life Plans [Member]
        
Net Periodic benefit cost (income)        
Service cost 3 3 7 7
Interest cost 15 18 28 36
Expected return on plan assets (1) (1) (2) (3)
Amortization of transition obligation   8   16
Amortization of prior service cost (credits) 1 1 2 2
Amortization of net actuarial loss (gain) (5) (5) (10) (10)
Recognized loss due to settlements and curtailments   0 0 0
Net periodic benefit cost (income) 13 24 25 48
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Estimated future employer contributions in current fiscal year     107  
Contribution made under group annuity contract     54  
Non-U.S. Pension Plans [Member]
        
Net Periodic benefit cost (income)        
Service cost 8 10 17 20
Interest cost 25 25 50 49
Expected return on plan assets (31) (35) (63) (69)
Amortization of transition obligation   0   0
Amortization of prior service cost (credits) 0 0 0 0
Amortization of net actuarial loss (gain) 0 (2) 1 (4)
Recognized loss due to settlements and curtailments   0 (7) 0
Net periodic benefit cost (income) 2 (2) (2) (4)
Pensions And Postretirement Benefits (Textuals) [Abstract]        
Estimated future employer contributions in current fiscal year     122  
Contribution made under group annuity contract     $ 88  
[1] Includes nonqualified pension plans and the terminated Merrill Lynch U.S. pension plan.