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summary Of Significant Accounting Policies - (Schedule of Components of Investments) (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]    
Investments $ 423 $ 402
Catalyst [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Investments $ 354 368
Percentage Of Interest In Investments 50.00%  
Other Member    
Summary Of Significant Accounting Policies [Line Items]    
Investments $ 69 $ 34