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Acquisitions and Other Transactions (Whiptail Midstream) (Details) - USD ($) $ in Millions		9 Months Ended
	Mar. 11, 2025	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Acquisitions, net of cash acquired		$ 3,316	$ 622
Whiptail Midstream Acquisition
Business Combination [Line Items]
Acquisitions, net of cash acquired	$ 237
Property, plant and equipment	172
Intangibles	41
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Net Working Capital	$ 24

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