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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Receivables- |  |
Allowance for uncollectible accounts | $ 124 | $ 137
Common stock, par value (in dollars per share) | $ 0.10 | $ 0.10
Common stock, authorized (in shares) | 700,000,000 | 700,000,000
Common stock, outstanding (in shares) | 572,836,882 | 572,130,932
Other |  |
Receivables- |  |
Allowance for uncollectible accounts | $ 10 | $ 11

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