Level 3 Analysis - Supplemental Data [Abstract]

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- Definition

The percentage of level 3 assets as compared to total assets of the entity.

+ References

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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- Definition

Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

+ 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)(3)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of transfers of financial instrument classified as a liability out of level 3 of the fair value hierarchy.

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- Definition

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

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

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Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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-Topic 820
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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

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

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Fair Value Measurement - Level 3 Analysis (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Level 3 Analysis - Supplemental Data [Abstract]
Percentage of level 3 assets in total Firm assets	0.50%
Total debt and equity instruments
Level 3 Analysis - Supplemental Data [Abstract]
Transfers from level 2 into level 3, liabilities	$ 59	$ 86
Transfers from level 3 into level 2, liabilities	3	1
Recurring
Level 3 Analysis - Supplemental Data [Abstract]
Assets fair value	1,362,935		$ 1,243,209
Recurring \| Total debt and equity instruments
Level 3 Analysis - Supplemental Data [Abstract]
Transfers from level 2 into level 3, liabilities		2,100
Recurring \| Equity \| Derivative payables
Level 3 Analysis - Supplemental Data [Abstract]
Transfers from level 2 into level 3, liabilities		1,700
Recurring \| Derivative receivables \| Equity
Level 3 Analysis - Supplemental Data [Abstract]
Transfers from level 2 into level 3, assets		1,000
Recurring \| Level 3
Level 3 Analysis - Supplemental Data [Abstract]
Assets fair value	17,362		$ 16,410
Increase (decrease) in level 3 assets	952
Realized/unrealized gains (losses), assets	984	1,200
Realized/unrealized gains (losses), liabilities	528	$ 4,600
Recurring \| Level 3 \| MSRs
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	$ 1,200