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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-30

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- Definition

Fair Value Inputs Credit Valuation Adjustment As A Percentage Of Derivative Contract

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- Definition

Other guarantees carrying value excluding standby letters of credit.

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- Definition

Unfunded commitments deferred non-yield related loan fees and standby letters of credit carrying value.

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No definition available.

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Fair Values of Assets and Liabilities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Carrying value of unfunded commitments, deferred non-yield related loan fees and standby letters of credit	$ 604		$ 604		$ 498
Other guarantees carrying value	202		202		$ 241
Gain/Loss recognized related to assets and liabilities elected at fair value option	(28)	$ (144)	(61)	$ (442)
Interest Expense [Member] \| Time Deposits [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value Disclosures [Abstract]
Gain/Loss recognized related to assets and liabilities elected at fair value option	$ 1		$ 1
Minimum [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of derivative contract fair value			0.00%
Maximum [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of derivative contract fair value			3348.00%
Weighted Average [Member]
Fair Value Disclosures [Abstract]
Assumed credit valuation adjustment as percentage of derivative contract fair value			4.00%