Incentive Plans (Schedule Of Expense Relating To RSUs, Charged To Compensation And Benefits Expense And Restructuring Expense) (Details) (USD $) In Thousands	1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 31, 2010	Sep. 30, 2011	Sep. 30, 2010	Mar. 31, 2010	Sep. 30, 2011	Sep. 30, 2010
Incentive Plans
Compensation and benefits		$ 58,489	$ 46,814		$ 200,899	$ 201,157	[1]
Restructuring						46,880	[1]
Total		58,489	46,814		200,899	248,037	[1]
Share Based Compensation Expense RSU Awards Expense In Connection With Change In Retirement Policy	$ 24,860			$ 24,860

[1] Includes, during the nine month period ended September 30, 2010, $24,860 relating to the January 2010 amendment of the Company's retirement policy (described below).