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Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments



In Millions
	December 31, 2012															December 31, 2011
	Carrying			Fair Value												Carrying
	Amount			Total			Level 1			Level 2			Level 3			Amount			Fair Value
CMS Energy, including Consumers
Securities held to
maturity		$	9		$	10		$	-		$	10		$	-		$	7		$	7
Notes receivable¹			544			581			-			-			581			480			504
Long-term debt²			7,229			8,347			-			7,321			1,026			7,073			8,025
Consumers
Long-term debt³		$	4,338		$	5,015		$	-		$	3,989		$	1,026		$	4,326		$	4,882

¹	Includes current portion of notes receivable of $40 million at December 31, 2012 and $19 million at December 31, 2011.

²	Includes current portion of long-term debt of $519 million at December 31, 2012 and $1,033 million at December 31, 2011.

³	Includes current portion of long-term debt of $41 million at December 31, 2012 and $339 million at December 31, 2011.

Schedule Of Investment Securities



In Millions
	December 31, 2012												December 31, 2011
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	123		$	3		$	-		$	126		$	113		$	-		$	-		$	113
Held to maturity
Debt securities			9			1			-			10			7			-			-			7
Consumers
Available for sale
DB SERP
Mutual funds		$	83		$	2		$	-		$	85		$	74		$	-		$	-		$	74
CMS Energy
common stock			6			26			-			32			7			28			-			35

Schedule Of Proceeds And Gross Realized Gains/Losses From Sales Of Available-For-Sale Securities



In Millions
Years Ended December 31	2012			2011			2010
CMS Energy, including Consumers
Proceeds from sales of investment securities		$	3		$	29		$	1
Consumers
Proceeds from sales of investment securities		$	2		$	19		$	-

Consumers Energy Company [Member]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments



In Millions
	December 31, 2012															December 31, 2011
	Carrying			Fair Value												Carrying
	Amount			Total			Level 1			Level 2			Level 3			Amount			Fair Value
CMS Energy, including Consumers
Securities held to
maturity		$	9		$	10		$	-		$	10		$	-		$	7		$	7
Notes receivable¹			544			581			-			-			581			480			504
Long-term debt²			7,229			8,347			-			7,321			1,026			7,073			8,025
Consumers
Long-term debt³		$	4,338		$	5,015		$	-		$	3,989		$	1,026		$	4,326		$	4,882

¹	Includes current portion of notes receivable of $40 million at December 31, 2012 and $19 million at December 31, 2011.

²	Includes current portion of long-term debt of $519 million at December 31, 2012 and $1,033 million at December 31, 2011.

³	Includes current portion of long-term debt of $41 million at December 31, 2012 and $339 million at December 31, 2011.

Schedule Of Investment Securities



In Millions
	December 31, 2012												December 31, 2011
				Unrealized			Unrealized			Fair						Unrealized			Unrealized			Fair
	Cost			Gains			Losses			Value			Cost			Gains			Losses			Value
CMS Energy, including Consumers
Available for sale
DB SERP
Mutual funds		$	123		$	3		$	-		$	126		$	113		$	-		$	-		$	113
Held to maturity
Debt securities			9			1			-			10			7			-			-			7
Consumers
Available for sale
DB SERP
Mutual funds		$	83		$	2		$	-		$	85		$	74		$	-		$	-		$	74
CMS Energy
common stock			6			26			-			32			7			28			-			35

Schedule Of Proceeds And Gross Realized Gains/Losses From Sales Of Available-For-Sale Securities



In Millions
Years Ended December 31	2012			2011			2010
CMS Energy, including Consumers
Proceeds from sales of investment securities		$	3		$	29		$	1
Consumers
Proceeds from sales of investment securities		$	2		$	19		$	-

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 14

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph c(2), d, e, f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15

-Subparagraph b-d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13467-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 19

-Subparagraph a, b, c(1), d(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph a, c(1), c(2), c(3), d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Section 50

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-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

+ Details

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

+ References+ Details