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Acquisitions - AllFirst Carrying Value and Estimated Useful Lives (Details) - AllFirst $ in Millions	Aug. 09, 2022 USD ($)
Business Acquisition [Line Items]
Other intangible assets	$ 55
Customer relationships
Business Acquisition [Line Items]
Other intangible assets	$ 46
Weighted average useful life (years)	10 years
Trademarks and licenses
Business Acquisition [Line Items]
Other intangible assets	$ 7
Weighted average useful life (years)	10 years
Noncompete Agreements
Business Acquisition [Line Items]
Other intangible assets	$ 1
Weighted average useful life (years)	5 years
Software
Business Acquisition [Line Items]
Other intangible assets	$ 1
Weighted average useful life (years)	2 years

X

- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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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.

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI https://asc.fasb.org/extlink&oid=123455525&loc=d3e2207-128464

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=128092470&loc=d3e4845-128472

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