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Consolidated Balance Sheets - Exelon (Parentheticals) - USD ($)
shares in Millions, $ in Millions
Sep. 30, 2024
Dec. 31, 2023
Statement of Financial Position [Abstract]    
Accumulated depreciation and amortization $ 18,227 $ 17,251
Common stock (in dollars) $ 0 $ 0
Common stock, shares authorized (in shares) 2,000 2,000
Common stock, shares outstanding (in shares) 1,005 999
Treasury stock, common (in shares) 2 2