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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Allowance for doubtful accounts receivable | $ 20 | $ 20
Allowances for doubtful notes receivable | $ 33 | $ 24
Common stock authorized (in shares) | 350,000,000 | 350,000,000
Common stock outstanding (in shares) | 283,900,000 | 283,400,000
Par value of preferred stock (in dollars per share) | $ 0.01 |
Consumers Energy Company |  |
Allowance for doubtful accounts receivable | $ 20 | $ 20
Common stock authorized (in shares) | 125,000,000 | 125,000,000
Common stock outstanding (in shares) | 84,100,000 | 84,100,000
Par value of preferred stock (in dollars per share) | $ 4.50 | $ 4.50

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