v2.3.0.11
Segment And Geographic Information (Net Revenues By Geographic Area) (Details) (USD $)
In Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Net Revenues $ 9,282 [1] $ 7,963 [1] $ 16,917 [1] $ 17,035 [1]
Americas [Member]
        
Net Revenues 6,629 5,673 12,119 11,873
Europe, Middle East, And Africa [Member]
        
Net Revenues 1,572 1,720 3,276 3,726
Asia [Member]
        
Net Revenues $ 1,081 $ 570 $ 1,522 $ 1,436
[1] In certain management fee arrangements, the Company is entitled to receive performance-based fees (also referred to as incentive fees) when the return on assets under management exceeds certain benchmark returns or other performance targets. In such arrangements, performance fee revenue is accrued (or reversed) quarterly based on measuring account fund performance to date versus the performance benchmark stated in the investment management agreement. The amount of performance-based fee revenue at risk of reversing if fund performance falls below stated investment management agreement benchmarks was approximately $262 million at June 30, 2011 and approximately $208 million at December 31, 2010 (see Note 2 to the consolidated financial statements for the year ended December 31, 2010 included in the Form 10-K).