Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Feb. 28, 2013	Nov. 30, 2013	Nov. 30, 2015	Nov. 30, 2014
Adjustments to reconcile net earnings to net cash (used in) provided by operating activities:
Goodwill impairment			$ 0	$ 54,000
Successor [Member]
Cash flows from operating activities:
Net earnings		$ 169,609	95,329	160,960
Adjustments to reconcile net earnings to net cash (used in) provided by operating activities:
Depreciation and amortization		(2,509)	15,236	691
Goodwill impairment		0	0	54,000
Interest on mandatorily redeemable preferred interests of consolidated subsidiaries		3,368	0	0
Accruals related to various benefit plans and stock issuances, net of forfeiture		0	0	0
Deferred income taxes		31,284	88,796	122,195
Income on loans to and investments in related parties		(92,181)	(75,717)	(90,243)
Distributions received on investments in related parties		37,742	76,681	53,985
Other adjustments		(14,740)	(97,804)	(78,064)
Net change in assets and liabilities:
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations		113,754	2,691,028	166,108
Receivables:
Brokers, dealers and clearing organizations		506,774	576,832	11,872
Customers		(170,286)	57,837	(294,412)
Fees, interest and other		(29,388)	541	(12,062)
Securities borrowed		(41,678)	(127,060)	(1,497,438)
Financial instruments owned		(200,974)	2,003,978	(2,243,053)
Loans to and investments in related parties		0	0	0
Investments in managed funds		2,674	15,498	13,473
Securities purchased under agreements to resell		(156,197)	53,817	(200,568)
Other assets		47,296	(63,110)	(146,114)
Payables:
Brokers, dealers and clearing organizations		(532,255)	471,661	968,615
Customers		(224,772)	(3,455,080)	1,089,423
Securities loaned		600,539	385,929	95,607
Financial instruments sold, not yet purchased		(2,511,777)	(2,043,319)	1,832,930
Securities sold under agreements to repurchase		2,794,412	(650,795)	(84,303)
Accrued expenses and other liabilities		414,515	(230,370)	69,459
Net cash (used in) provided by operating activities		745,210	(210,092)	(6,939)
Cash flows from investing activities:
Contributions to loans to and investments in related parties		(2,241,232)	(1,438,675)	(2,786,394)
Distributions from loans to and investments in related parties		2,360,691	1,384,944	2,751,384
Net payments on premises and equipment		(48,534)	(68,813)	(110,536)
Cash disposed in connection with disposal of reporting units, net of cash received		(4,939)	0	0
Deconsolidation of asset management entity		0	(16,512)	(137,856)
Cash received from contingent consideration		3,796	4,444	6,253
Net cash (used in) provided by investing activities		69,782	(134,612)	(277,149)
Cash flows from financing activities:
Excess tax benefits from the issuance of share-based awards		3,054	749	1,921
Proceeds from short-term borrowings		13,623,650	17,263,217	18,965,163
Payments on short-term borrowings		(13,711,650)	(16,964,558)	(18,965,163)
Proceeds from secured credit facility		920,000	903,000	2,819,000
Payments on secured credit facility		(980,000)	(1,073,000)	(2,849,000)
Net proceeds from other secured financings		114,711	157,085	371,113
Net proceeds from issuance of senior notes, net of issuance costs		0	0	681,222
Repayment of long-term debt		0	(500,000)	(250,000)
Proceeds from contributions of noncontrolling interests		100,210	0	39,075
Payments on mandatorily redeemable preferred interest of consolidated subsidiaries		(64)	0	0
Payments on repurchase of common stock		0	0	0
Payments on dividends		0	0	0
Proceeds from exercise of stock options, not including tax benefits		0	0	0
Payments on distributions to noncontrolling interests		(347,654)	(4,982)	0
Net cash (used in) provided by financing activities		(277,743)	(218,489)	813,331
Effect of changes in exchange rates on cash and cash equivalents		5,912	(6,612)	(10,394)
Net (decrease) increase in cash and cash equivalents		543,161	(569,805)	518,849
Cash and cash equivalents at beginning of period		3,017,958	4,079,968	3,561,119
Cash and cash equivalents at end of period	$ 3,017,958	3,561,119	3,510,163	4,079,968
Cash paid (received) during the period for:
Interest		638,657	859,815	922,194
Income taxes, net		55,251	$ (683)	$ 120,703
Predecessor [Member]
Cash flows from operating activities:
Net earnings	90,842
Adjustments to reconcile net earnings to net cash (used in) provided by operating activities:
Depreciation and amortization	17,393
Goodwill impairment	0
Interest on mandatorily redeemable preferred interests of consolidated subsidiaries	10,961
Accruals related to various benefit plans and stock issuances, net of forfeiture	23,505
Deferred income taxes	30,835
Income on loans to and investments in related parties	0
Distributions received on investments in related parties	0
Other adjustments	(1,154)
Net change in assets and liabilities:
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	352,891
Receivables:
Brokers, dealers and clearing organizations	(1,225,840)
Customers	67,626
Fees, interest and other	(29,149)
Securities borrowed	(224,557)
Financial instruments owned	229,394
Loans to and investments in related parties	(197,166)
Investments in managed funds	(2,213)
Securities purchased under agreements to resell	(224,418)
Other assets	(5,346)
Payables:
Brokers, dealers and clearing organizations	(1,018,241)
Customers	(124,233)
Securities loaned	(28,138)
Financial instruments sold, not yet purchased	2,327,667
Securities sold under agreements to repurchase	(197,493)
Accrued expenses and other liabilities	(267,336)
Net cash (used in) provided by operating activities	(394,170)
Cash flows from investing activities:
Contributions to loans to and investments in related parties	0
Distributions from loans to and investments in related parties	0
Net payments on premises and equipment	(10,706)
Cash disposed in connection with disposal of reporting units, net of cash received	0
Deconsolidation of asset management entity	0
Cash received from contingent consideration	1,203
Net cash (used in) provided by investing activities	(9,503)
Cash flows from financing activities:
Excess tax benefits from the issuance of share-based awards	5,682
Proceeds from short-term borrowings	6,744,000
Payments on short-term borrowings	(6,794,000)
Proceeds from secured credit facility	900,000
Payments on secured credit facility	(990,007)
Net proceeds from other secured financings	60,000
Net proceeds from issuance of senior notes, net of issuance costs	991,469
Repayment of long-term debt	0
Proceeds from contributions of noncontrolling interests	0
Payments on mandatorily redeemable preferred interest of consolidated subsidiaries	(61)
Payments on repurchase of common stock	(166,541)
Payments on dividends	(15,799)
Proceeds from exercise of stock options, not including tax benefits	57
Payments on distributions to noncontrolling interests	(1,262)
Net cash (used in) provided by financing activities	733,538
Effect of changes in exchange rates on cash and cash equivalents	(4,502)
Net (decrease) increase in cash and cash equivalents	325,363
Cash and cash equivalents at beginning of period	2,692,595	$ 3,017,958
Cash and cash equivalents at end of period	3,017,958
Cash paid (received) during the period for:
Interest	178,836
Income taxes, net	$ (34,054)