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Summary Of Significant Accounting Policies (Schedule of Components of Investments) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]    
Investments $ 666 $ 440
Catalyst [Member]    
Summary Of Significant Accounting Policies [Line Items]    
% Interest 50.00%  
Investments $ 311 339
Water JV [Member]    
Summary Of Significant Accounting Policies [Line Items]    
% Interest 30.00%  
Investments $ 216 0
Matterhorn [Member]    
Summary Of Significant Accounting Policies [Line Items]    
% Interest 12.50%  
Investments $ 90 54
Other [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Investments $ 49 $ 47