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Property, Plant And Equipment (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Interest capitalized $ 76 $ 81 $ 83
Property, plant and equipment additions, non-cash 46 47  
Property, plant and equipment included in accounts payable 295 182  
Property, Plant and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Depreciation $ 1,488 $ 1,533 $ 1,567