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Income Taxes - Schedule of Components of Income Taxes Paid (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Paid, by Individual Jurisdiction [Line Items]      
US Federal $ 930 $ 698 $ 1,009
Total U.S. State and Local 71 191 175
Foreign 1 (2) 14
Total income taxes paid, net 1,002 887 1,198
Tax credits purchased, federal 100 49  
Tax credits purchased, State and Local 15 10 19
PENNSYLVANIA      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
Total U.S. State and Local   53  
Other      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
Total U.S. State and Local $ 71 $ 138 $ 175