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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash, Cash Equivalents and Restricted Cash:        
Cash and cash equivalents $ 180 $ 76    
Restricted cash 140 130    
Total cash, cash equivalents and restricted cash shown in the Statements of Consolidated Cash Flows 320 206 $ 2,965 $ 1,158
Allowance for Credit Losses [Member]        
Movement in valuation allowances and reserves [Roll Forward]        
Balance at beginning of period 54 53 47  
Charged to costs and expenses 1 6 7  
Charged to other accounts 0 1 4  
Deductions (20) (6) (5)  
Balance at end of period $ 35 $ 54 $ 53  
Minor Investment [Member] | Minimum [Member]        
Consolidation Policy [Abstract]        
Equity method of ownership interest 3.00%      
Minor Investment [Member] | Maximum [Member]        
Consolidation Policy [Abstract]        
Equity method of ownership interest 50.00%      
Major Investment [Member] | Minimum [Member]        
Consolidation Policy [Abstract]        
Equity method of ownership interest 20.00%      
Major Investment [Member] | Maximum [Member]        
Consolidation Policy [Abstract]        
Equity method of ownership interest 50.00%