Derivative Financial instruments and Risk Management- Effect of net settlement provisions upon default or termination (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets
Gross Amounts Recognized	$ 462	$ 520
Financial Instruments Not Offset	(186)	(202)
Net Amount	276	318
Liabilities
Gross Amounts Recognized	(571)	(455)
Financial Instruments Not Offset	186	202
Net Amount	$ (385)	$ (253)

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