Consolidated Statements of Financial Condition (Unaudited) (USD $) In Thousands, unless otherwise specified	Feb. 29, 2012	Nov. 30, 2011
ASSETS
Cash and cash equivalents	$ 2,589,193	$ 2,393,797
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	3,636,531	3,344,960
Financial instruments owned, at fair value, including securities pledged of 11,614,619 and $12,452,970 at February 29, 2012 and November 30, 2011, respectively:
Corporate equity securities	1,486,405	1,235,079
Corporate debt securities	3,087,846	2,868,304
Government, federal agency and other sovereign obligations	5,052,529	7,471,563
Mortgage- and asset-backed securities	3,423,647	3,923,303
Loans and other receivables	427,134	376,146
Derivatives	312,156	525,893
Investments, at fair value	105,719	105,585
Physical commodities	205,112	172,668
Total financial instruments owned, at fair value	14,100,548	16,678,541
Investments in managed funds	73,015	70,740
Loans to and investments in related parties	547,893	594,538
Securities borrowed	5,036,447	5,169,689
Securities purchased under agreements to resell	4,434,611	2,893,043
Securities received as collateral	984	21,862
Receivables:
Brokers, dealers and clearing organizations	1,720,976	1,235,393
Customers	857,654	1,116,982
Fees, interest and other	206,864	163,092
Premises and equipment	173,446	175,139
Goodwill	365,508	365,574
Other assets	820,070	748,072
Total assets	34,563,740	34,971,422
LIABILITIES AND STOCKHOLDERS' EQUITY
Short-term borrowing	100,000	52,721
Financial instruments sold, not yet purchased, at fair value:
Corporate equity securities	1,517,197	1,330,096
Corporate debt securities	1,893,280	1,614,493
Government, federal agency and other sovereign obligations	4,279,673	3,209,713
Mortgage- and asset-backed securities	16,712	50,517
Loans	93,606	151,117
Derivatives	201,245	249,037
Total financial instruments sold, not yet purchased, at fair value	8,001,713	6,604,973
Securities loaned	1,829,111	1,706,308
Securities sold under agreements to repurchase	8,576,917	9,620,663
Obligation to return securities received as collateral	984	21,862
Payables:
Brokers, dealers and clearing organizations	1,316,673	2,816,877
Customers	5,305,110	4,763,364
Accrued expenses and other liabilities	609,856	803,219
Long-term debt	4,746,077	4,608,926
Mandatorily redeemable convertible preferred stock	125,000	125,000
Mandatorily redeemable preferred interest of consolidated subsidiaries	332,378	310,534
Total liabilities	30,943,819	31,434,447
STOCKHOLDERS' EQUITY
Common stock, $.0001 par value. Authorized 500,000,000 shares; issued 209,061,653 shares at February 29, 2012 and 197,197,848 shares at November 30, 2011	21	20
Additional paid-in capital	2,253,641	2,207,410
Retained earnings	1,128,120	1,067,858
Less: Treasury stock, at cost, 3,242,869 shares at February 29, 2012 and 37,842 shares at November 30, 2011	(49,106)	(486)
Accumulated other comprehensive loss:
Currency translation adjustments	(34,029)	(39,520)
Additional minimum pension liability	(10,970)	(10,970)
Total accumulated other comprehensive loss	(44,999)	(50,490)
Total common stockholders' equity	3,287,677	3,224,312
Noncontrolling interests	332,244	312,663
Total stockholders' equity	3,619,921	3,536,975
Total liabilities and stockholders' equity	34,563,740	34,971,422
Variable Interest Entity, Primary Beneficiary
ASSETS
Cash and cash equivalents	455,673	345,959
Financial instruments owned, at fair value, including securities pledged of 11,614,619 and $12,452,970 at February 29, 2012 and November 30, 2011, respectively:
Corporate equity securities	83,009	61,670
Corporate debt securities	255,110	326,549
Mortgage- and asset-backed securities	39,457	41,004
Loans and other receivables	274,679	281,416
Derivatives	191	569
Investments, at fair value	1,570	1,570
Total financial instruments owned, at fair value	654,016	712,778
Receivables:
Brokers, dealers and clearing organizations	82,452	150,592
Fees, interest and other	5,849	7,396
Other assets	304	385
Total assets	1,198,294	1,217,110
Financial instruments sold, not yet purchased, at fair value:
Corporate equity securities	7,648	7,122
Corporate debt securities	268,184	200,223
Loans	76,365	117,958
Derivatives	665	935
Total financial instruments sold, not yet purchased, at fair value	352,862	326,238
Payables:
Brokers, dealers and clearing organizations	79,587	105,165
Accrued expenses and other liabilities	11,376	9,740
Mandatorily redeemable preferred interest of consolidated subsidiaries	332,378	310,534
Total liabilities	$ 776,203	$ 751,677