Fair Value Measurements (Narrative) (Details) - USD ($)	6 Months Ended
Jun. 30, 2025	Dec. 31, 2024
Fair Value Measurements [Abstract]
Long-term Debt	$ 1,186,000,000	$ 1,199,000,000
Fair value of long-term debt	1,204,000,000	$ 1,211,000,000
Transfers between levels during period	$ 0

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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+ Details

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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+ Details