Condensed Consolidated Balance Sheets - Piedmont (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Allowance for doubtful accounts - receivables	$ 102	$ 55
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	772,000,000	771,000,000
Piedmont
Allowance for doubtful accounts - receivables	$ 12	$ 11
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100