Disclosures About Segments And Related Information (Schedule Of Long-Lived Assets By Geographic Regions) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 294,318	$ 214,940	$ 204,692
United States
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	178,633	95,792	90,051
Non-U.S.
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	115,685	119,148	114,641
Canada
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	28,761	31,682	31,106
Singapore
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	12,621	12,490	11,972
Guyana
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	12,414	9,689	6,766
Australia
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 9,818	$ 11,212	$ 11,372