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Long-term Incentive Compensation (Schedule of Equity-Classified Stock-Based Compensation Costs) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]    
Equity-classified awards – expensed $ 1 $ 0
Equity-classified awards – capitalized $ 0 $ 0