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Debt (Schedule of Short-term Debt) (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates    
Current installments of long-term debt $ 525 $ 527
Short-term borrowings, including amounts due to affiliates(1) [1] 35 64
Total $ 860 $ 791
Loans Payable    
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates    
Weighted average interest rate, short-term borrowings 0.20% 0.20%
Revolving Credit Facility    
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates    
Weighted average interest rate, short-term borrowings 1.70% 1.40%
Revolving Credit Facility    
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates    
Revolving credit facility(2) [2] $ 300 $ 200
Revolving Credit Facility | Revolving Credit Facility    
Short-Term Borrowings and Current Installments of Long-Term Debt - Third Party and Affiliates    
Revolving credit facility(2) [3] $ 300  
[1] The weighted average interest rate was 0.2% and 0.2% as of March 31, 2022 and December 31, 2021, respectively.
[2] The weighted average interest rate was 1.7% and 1.4% as of March 31, 2022 and December 31, 2021, respectively.
[3] The Company borrowed $365 million under its new senior unsecured revolving credit facility to repay and terminate its previous unsecured revolving credit facility and repaid $65 million under its new senior unsecured revolving credit facility during the three months ended March 31, 2022. The Company borrowed $165 million and repaid $365 million under its previous unsecured revolving credit facility during the three months ended March 31, 2022.