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Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 1 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2013 Consumers Energy Company [Member] | Dec. 31, 2012 Consumers Energy Company [Member] | Jan. 31, 2013 Renewable Energy Grant [Member] Consumers Energy Company [Member]
Regulatory Liabilities [Line Items] |  |  |  |
Proceeds from government grant | $ 69 | $ 69 |  | $ 69
Recorded liability |  | $ 2,282 | $ 2,126 | $ 69

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- Definition Cash grant received from government during the current period. + References No definition available. + Details
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- Definition The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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- Details
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