Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	5 Months Ended	6 Months Ended
	May 31, 2010	May 31, 2011
Cash flows from operating activities:
Net earnings	$ 120,191	$ 186,745
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation and amortization	14,720	25,209
Fees related to assigned management agreements	(1,587)	(1,736)
Interest on mandatorily redeemable preferred interests of consolidated subsidiaries	2,513	20,854
Accruals related to various benefit plans and stock issuances, net of estimated forfeitures	18,011	37,817
Decrease (increase) in cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	(323,250)	417,049
Increase in receivables:
Brokers, dealers and clearing organizations	(741,789)	(1,274,030)
Customers	(552,492)	(473,600)
Fees, interest and other	(50,866)	(119,575)
Increase in securities borrowed	(289,095)	(58,616)
Increase in financial instruments owned	(4,329,765)	(1,645,394)
Increase in other investments	(29,762)	(209,105)
Decrease (increase) in investments in managed funds	(7,823)	6,282
(Increase) decrease in securities purchased under agreements to resell	302,795	(46,590)
Increase in other assets	(184,498)	(182,534)
Increase in payables:
Brokers, dealers and clearing organizations	443,574	1,386,872
Customers	114,208	344,807
Increase in securities loaned	572,189	54,510
Increase in financial instruments sold, not yet purchased	2,474,499	2,183,385
(Decrease) increase in securities sold under agreements to repurchase	1,737,028	(1,565,229)
Increase in accrued expenses and other liabilities	23,298	15,487
Net cash used in operating activities	(687,901)	(897,392)
Cash flows from investing activities:
Net payments on premises and equipment	(10,136)	(27,568)
Cash received from contingent consideration	925	1,752
Cash paid for contingent consideration	(6,997)
Net cash used in investing activities	(16,208)	(25,816)
Cash flows from financing activities:
Excess tax benefits from the issuance of share-based awards	1,994	34,010
Gross proceeds from short-term borrowings	1,497,000	1,257,000
Gross payments on short-term borrowings	(1,497,000)	(1,257,000)
Net proceeds from (payments on):
Issuance of common shares		494,845
Issuance of senior notes, net of issuance costs		794,587
Mandatorily redeemable preferred interest of consolidated subsidiaries	(17,066)	(8,949)
Noncontrolling interest	(14,408)	(20,671)
Repurchase of common stock	(103,336)	(41,567)
Dividends	(12,957)	(28,161)
Exercise of stock options, not including tax benefits	108	51
Net cash provided by (used in) financing activities	(145,665)	1,224,145
Effect of foreign currency translation on cash and cash equivalents	(9,109)	8,802
Net increase (decrease) in cash and cash equivalents	(858,883)	309,739
Cash and cash equivalents at beginning of period	1,853,167	2,188,998
Cash and cash equivalents at end of period	994,284	2,498,737
Cash paid during the year for:
Interest	237,138	363,397
Income taxes, net	$ 84,090	$ 129,984