Segment Information - Energy & Transportation Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Energy and transportation sales
Sales and revenues	$ 17,318	$ 14,247	$ 33,180	$ 27,836
Energy & Transportation
Energy and transportation sales
Sales and revenues	5,957	4,640	11,012	8,672
Energy & Transportation | Oil and gas
Energy and transportation sales
Sales and revenues	1,760	1,232	3,074	2,180
Energy & Transportation | Power generation
Energy and transportation sales
Sales and revenues	1,645	1,186	2,929	2,198
Energy & Transportation | Industrial
Energy and transportation sales
Sales and revenues	1,318	1,117	2,573	2,137
Energy & Transportation | Transportation
Energy and transportation sales
Sales and revenues	$ 1,234	$ 1,105	$ 2,436	$ 2,157