Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2011	Nov. 30, 2010
Fair value and related number of derivative contracts categorized by predominant risk exposure
Fair Value Assets	$ 2,525,560	$ 455,880
Number of contracts, Assets	2,700,663	1,312,276
Fair Value Liabilities	2,515,441	485,072
Number of contracts, Liabilities	2,515,562	1,212,083
Counterparty/cash-collateral netting, Assets	(1,609,418)	(336,612)
Counterparty/cash-collateral netting, Liabilities	(1,919,499)	(425,520)
Total Derivative Assets per Consolidated Statement of Financial Condition	916,142	119,268
Total Derivative Liabilities per Consolidated Statement of Financial Condition	595,942	59,552
Interest rate contracts [Member]
Fair value and related number of derivative contracts categorized by predominant risk exposure
Fair Value Assets	417,666	77,295
Number of contracts, Assets	93,251	41,166
Fair Value Liabilities	512,254	126,281
Number of contracts, Liabilities	134,486	43,243
Foreign exchange contracts [Member]
Fair value and related number of derivative contracts categorized by predominant risk exposure
Fair Value Assets	501,063	20,263
Number of contracts, Assets	105,139	1,165
Fair Value Liabilities	546,885	17,004
Number of contracts, Liabilities	109,033	290
Equity contracts [Member]
Fair value and related number of derivative contracts categorized by predominant risk exposure
Fair Value Assets	951,232	275,760
Number of contracts, Assets	2,329,567	1,166,365
Fair Value Liabilities	665,190	249,229
Number of contracts, Liabilities	2,090,700	1,133,464
Commodity contracts [Member]
Fair value and related number of derivative contracts categorized by predominant risk exposure
Fair Value Assets	595,268	62,727
Number of contracts, Assets	172,621	103,562
Fair Value Liabilities	749,278	76,911
Number of contracts, Liabilities	181,285	35,071
Credit contracts [Member]
Fair value and related number of derivative contracts categorized by predominant risk exposure
Fair Value Assets	60,331	19,835
Number of contracts, Assets	85	18
Fair Value Liabilities	$ 41,834	$ 15,647
Number of contracts, Liabilities	58	15

The number of derivative instruments of a particular derivative asset or group of derivative assets held by the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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The amount as of the balance sheet date of the fair value of derivative assets that in accordance with the entity's accounting policy was not offset against an obligation to return cash collateral under a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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The amount as of the balance sheet date of the fair value of derivative assets that in accordance with the entity's accounting policy was offset against an obligation to return cash collateral under a master netting arrangement.

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Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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The amount as of the balance sheet date of the fair value of derivative liabilities that in accordance with the entity's accounting policy were offset against the right to reclaim cash collateral under a master netting arrangement.

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Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The number of derivative instruments of a particular derivative liability or group of derivative liabilities held by the entity.

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