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Goodwill and Other Intangibles (Other Intangibles Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite and Indefinite-Lived Intangible Assets [Line Items]
Amortization expense for other intangibles	$ 89	$ 104	$ 110
Mortgage servicing rights
Finite and Indefinite-Lived Intangible Assets [Line Items]
Net Carrying Amount	284	313
Mortgage servicing rights | Fair Value
Finite and Indefinite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 286	$ 316

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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.

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- Definition

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

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