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Accounts Receivable and Accrued Revenues (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Business Combination [Line Items]
Allowance for credit loss	$ 6	$ 5
Investment in marketable securities	$ 245
NuVista [Member]
Business Combination [Line Items]
Purchase of common stock, shares	18.5
Investment in marketable securities	$ 245
Unrealized gain	$ 28

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