Variable Interest Entities (Nonconsolidated Variable Interest Entities) - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Jan. 01, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Assets in VIEs	$ 76,010		$ 90,145
Carrying Value of the Firm's Variable Interests in Nonconsolidated VIEs - Assets	6,562		7,171
Maximum Exposure to Loss in Nonconsolidated VIEs	14,905		15,751
Investments in Funds and Other [Member]
Variable Interest Entity [Line Items]
Assets in VIEs	15,474		4,161
Carrying Value of the Firm's Variable Interests in Nonconsolidated VIEs - Assets	897		286
Maximum Exposure to Loss in Nonconsolidated VIEs	$ 1,457		$ 555
ASU No. 2015-02 [Member] \| Investments in Funds and Other [Member]
Variable Interest Entity [Line Items]
Assets in VIEs		$ 10,700
Carrying Value of the Firm's Variable Interests in Nonconsolidated VIEs - Assets		543
Maximum Exposure to Loss in Nonconsolidated VIEs		$ 559

Size of the variable interest entity measured by total assets.

No definition available.

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Balance Type:	debit
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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5747-111685

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Carrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

+ Details

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- Details

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- Details

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