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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Allowances for doubtful accounts receivable	$ 25	$ 25
Allowances for doubtful notes receivable	5	5
Common stock, shares authorized	350.0	350.0
Common stock, shares outstanding	251.8	249.6
Consumers Energy Company [Member]
Allowances for doubtful accounts receivable	$ 23	$ 23
Common stock, shares authorized	125.0	125.0
Common stock, shares outstanding	84.1	84.1

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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