Financial and Other Derivative Instruments ( Netting Offsets of Derivative Assets and Liabilities Reconciliation to the Statements of Financial Position) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Derivative Assets
Derivative Assets	$ 723	$ 707
Collateral adjustment	(18)	(35)
Total derivatives assets as reported, current	137	143
Total derivatives assets as reported, noncurrent	67	89
Derivative Liabilities
Derivative Liabilities	(750)	(597)
Collateral adjustment	44	5
Total derivatives liabilities as reported, current	(144)	(86)
Total derivatives liabilities as reported, noncurrent	(61)	(66)
Current derivative assets
Derivative Assets
Derivative Assets	536	482
Counterparty netting	(383)	(325)
Collateral adjustment	(16)	(14)
Noncurrent derivative assets
Derivative Assets
Derivative Assets	187	225
Counterparty netting	(118)	(115)
Collateral adjustment	(2)	(21)
Current derivative liabilities
Derivative Liabilities
Derivative Liabilities	(556)	(413)
Counterparty netting	383	325
Collateral adjustment	29	2
Noncurrent derivative liabilities
Derivative Liabilities
Derivative Liabilities	(194)	(184)
Counterparty netting	118	115
Collateral adjustment	$ 15	$ 3