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Consolidated Balance Sheet - UE (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Accounts receivable - trade, allowance for doubtful accounts | $ 30 | $ 31
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.01 | $ 0.01
Common stock, shares authorized | 400,000,000.0 | 400,000,000.0
Common Stock, Shares, Outstanding | 266,300,000 | 262,000,000.0
Ameren Missouri |  |
Accounts receivable - trade, allowance for doubtful accounts | $ 12 | $ 13
Common Stock, No Par Value (in dollars per share) | $ 5 | $ 5
Common stock, shares authorized | 150,000,000.0 | 150,000,000.0
Common Stock, Shares, Outstanding | 102,100,000 | 102,100,000

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