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Shareholders' Equity - Total Stock-based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Stock-based compensation expense, pre-tax	$ 21	$ 21	$ 20
Income tax benefit recognized in earnings	$ 4	$ 3	$ 3
Officers and Select Executives | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period	3 years
Share-based Compensation Arrangement by Share-based Payment Award - Maximum over-achievement	50.00%

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award - Maximum over-achievement - amount by which original grant may not be exceeded.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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