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Condensed Consolidated Balance Sheets - Piedmont (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Allowance for doubtful accounts - receivables $ 49 $ 40
Common stock, shares authorized (in shares) 2,000,000,000 2,000,000,000
Common stock, shares outstanding (in shares) 771,000,000 770,000,000
Piedmont    
Allowance for doubtful accounts - receivables $ 10 $ 14
Common stock, shares authorized (in shares) 100 100
Common stock, shares outstanding (in shares) 100 100