Fair Value [Line Items]

No definition available.

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- Definition

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings And Other Comprehensive Income

+ References

No definition available.

+ Details

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- Definition

Total contractual amount of unfunded commitments for which the fair value option was elected.

+ References

No definition available.

+ Details

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- Definition

Fair value of unfunded commitments for which the fair value option was elected.

+ References

No definition available.

+ Details

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- Definition

Other Secured Financing, Measurement Input.

+ References

No definition available.

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- Definition

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of gain (loss) recognized in other comprehensive income (OCI) from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of long-term debt instruments that have contractual principal amounts and for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

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- Definition

This item represents the estimated amount of gains or losses included in earnings during the period attributable to changes in instrument-specific credit risk arising from loans and other receivables held as assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612

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Fair Value Option - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) yr	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) yr	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) yr
Fair Value [Line Items]
Total contractual amount of unfunded commitments for which the fair value option was elected	$ 1,580		$ 1,580		$ 1,550
Net Gains (Losses) Attributable to the Impact of Changes in Instrument-Specific Credit Spreads on Loans and Lending Commitments For Which the Fair Value Option Was Elected	$ 73	$ (22)	$ (151)	$ 161
Unsecured Long-Term Borrowings at Fair Value [Member]
Fair Value [Line Items]
Difference between aggregate contractual principal amount of long-term debt instruments for which the fair value option was elected and related fair value					$ 199
Minimum [Member] \| Other Secured Financings at Fair Value [Member] \| Level 3 [Member] \| Fair Value Unobservable Inputs, Yield [Member]
Fair Value [Line Items]
Other secured financing measurement input	0.015		0.015		0.033
Minimum [Member] \| Other Secured Financings at Fair Value [Member] \| Level 3 [Member] \| Fair Value Unobservable Inputs, Duration [Member]
Fair Value [Line Items]
Other secured financing measurement input \| yr	0.9		0.9		0.6
Maximum [Member] \| Other Secured Financings at Fair Value [Member] \| Level 3 [Member] \| Fair Value Unobservable Inputs, Yield [Member]
Fair Value [Line Items]
Other secured financing measurement input	0.071		0.071		0.042
Maximum [Member] \| Other Secured Financings at Fair Value [Member] \| Level 3 [Member] \| Fair Value Unobservable Inputs, Duration [Member]
Fair Value [Line Items]
Other secured financing measurement input \| yr	8.3		8.3		2.1
Weighted Average [Member] \| Other Secured Financings at Fair Value [Member] \| Level 3 [Member] \| Fair Value Unobservable Inputs, Yield [Member]
Fair Value [Line Items]
Other secured financing measurement input	0.031		0.031		0.035
Weighted Average [Member] \| Other Secured Financings at Fair Value [Member] \| Level 3 [Member] \| Fair Value Unobservable Inputs, Duration [Member]
Fair Value [Line Items]
Other secured financing measurement input \| yr	4.2		4.2		1.0
Other Financial Liabilities [Member]
Fair Value [Line Items]
Gains/(Losses) on liabilities	$ (466)	(320)	$ 103	(2,150)
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of earnings	(112)	(135)	(244)	(307)
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of comprehensive income	(354)	(185)	347	(1,839)
Other Financial Liabilities [Member] \| Unsecured Long-Term Borrowings at Fair Value [Member]
Fair Value [Line Items]
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of earnings	(64)	(96)	(171)	(244)
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of comprehensive income	(167)	(60)	225	(1,110)
Other Financial Liabilities [Member] \| Other Secured Financings at Fair Value [Member]
Fair Value [Line Items]
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of earnings	7	4	13	19
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of comprehensive income	(67)	(5)	(12)	(24)
Other Financial Liabilities [Member] \| Debt Valuation Adjustment [Member]
Fair Value [Line Items]
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of comprehensive income	(138)	41	126	(362)
Other Financial Liabilities [Member] \| Market making [Member]
Fair Value [Line Items]
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of earnings	(289,000)	(361)	(38)	(1,780)
Other Financial Liabilities [Member] \| Other Principal Transactions [Member]
Fair Value [Line Items]
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of earnings	(32)	(4)	27	(2)
Other Financial Liabilities [Member] \| Interest Expense [Member]
Fair Value [Line Items]
Fair Value, Measured on Recurring Basis, Gains/(Losses) Included in condensed consolidated statements of earnings	(7)	$ (4)	(12)	$ (4)
Written Loan Commitment, Fair Value Option [Member]
Fair Value [Line Items]
Fair value of unfunded commitments for which the fair value option was elected	$ 22		$ 22		$ 24