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Intangible Assets - Schedule Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 756	$ 292
Accumulated Amortization	(95)	(5)
Net Carrying Value	661	287
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	700	250
Accumulated Amortization	(81)	(4)
Net Carrying Value	619	246
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	56	42
Accumulated Amortization	(14)	(1)
Net Carrying Value	$ 42	$ 41

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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