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Debt (Long-term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Long-term debt, net of current maturities	$ 551	$ 875
Credit Agreement
Debt Instrument [Line Items]
Deferred financing costs	(2)	(2)
Term Loan | Credit Agreement
Debt Instrument [Line Items]
Long term debt	586	610
Current maturities	(33)	(33)
Revolving Credit Facility | Unsecured Debt | Credit Agreement
Debt Instrument [Line Items]
Long term debt	$ 0	$ 300

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