Stock Compensation Plans - Stock-based Compensation Expense and Cash Activity (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Stock-based compensation expense recognized	$ 23	$ 23	$ 19
Tax benefit	0	(5)	(4)
After-tax stock-based compensation expense	23	18	15
Cash payments to settle SARs	0	0	0
Cash received from stock option exercises	$ 1	$ 3	$ 3

Cash Payment To Settle Sars and Performance Share Units

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- Definition

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

+ References

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Amount, after tax, of expense for award under share-based payment arrangement.

+ References

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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