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Segment Information - Energy & Transportation Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Energy and transportation sales
Sales and revenues	$ 14,249	$ 15,799
Energy & Transportation
Energy and transportation sales
Sales and revenues	5,398	5,487
Energy & Transportation | Oil and gas
Energy and transportation sales
Sales and revenues	1,258	1,568
Energy & Transportation | Power generation
Energy and transportation sales
Sales and revenues	1,996	1,618
Energy & Transportation | Industrial
Energy and transportation sales
Sales and revenues	967	989
Energy & Transportation | Transportation
Energy and transportation sales
Sales and revenues	$ 1,177	$ 1,312

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