Segment Reporting (Tables)

9 Months Ended

Aug. 31, 2011

Segment Reporting [Abstract]

Net revenues, and expenses by segment

					Nine Months		Eight Months
	Three Months Ended				Ended		Ended
	August 31, 2011		August 31, 2010		August 31, 2011		August 31, 2010
Capital Markets:
Net revenues	$	506.2	$	516.5	$	1,957.3	$	1,500.6
Expenses	$	463.7	$	435.0	$	1,616.0	$	1,218.8
Asset Management:
Net revenues	$	3.1	$	0.8	$	37.5	$	11.8
Expenses	$	5.0	$	8.3	$	24.0	$	20.6
Total:
Net revenues	$	509.3	$	517.3	$	1,994.8	$	1,512.4
Expenses	$	468.7	$	443.3	$	1,640.0	$	1,239.4

Total assets by segment

	August 31, 2011		August 31, 2010
Segment Assets:
Capital Markets	$	45,080.9	$	32,539.5
Asset Management		44.3		132.6
Total Assets	$	45,125.2	$	32,672.1

Net revenues by geographic region

					Nine Months		Eight Months
	Three Months Ended				Ended		Ended
	August 31, 2011		August 31, 2010		August 31, 2011		August 31, 2010
Americas (1)	$	372,727	$	428,037	$	1,611,117	$	1,294,118
Europe (2)		127,229		85,485		363,114		215,034
Asia (including Middle East)		9,326		3,747		20,599		3,285
Net Revenues	$	509,282	$	517,269	$	1,994,830	$	1,512,437

(1)	Substantially all relates to U.S. results.
(2)	Substantially all relates to U.K. results.