Business Combinations - Other Intangible Assets Acquired (Details) - MUB $ in Millions	Dec. 01, 2022 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 2,808
Mortgage servicing rights
Acquired Finite-Lived Intangible Assets [Line Items]
Fair Value	$ 147
Core deposit benefits
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-Average Estimated Life	10 years
Fair Value	$ 2,635
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-Average Estimated Life	11 years
Fair Value	$ 26

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.

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482665/350-30-50-1

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 30
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-Section 50
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-URI https://asc.fasb.org//1943274/2147482665/350-30-50-1

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