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Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments



In Millions
	March 31, 2013															December 31, 2012
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Securities held to maturity		$	9		$	9		$	-		$	9		$	-		$	9		$	10		$	-		$	10		$	-
Notes receivable¹			541			576			-			-			576			544			581			-			-			581
Long-term debt²			7,452			8,656			-			7,614			1,042			7,229			8,347			-			7,321			1,026
Consumers
Long-term debt³		$	4,327		$	5,002		$	-		$	3,960		$	1,042		$	4,338		$	5,015		$	-		$	3,989		$	1,026

¹	Includes current portion of notes receivable of $47 million at March 31, 2013 and $40 million at December 31, 2012.

²	Includes current portion of long-term debt of $711 million at March 31, 2013 and $519 million at December 31, 2012.

³	Includes current portion of long-term debt of $241 million at March 31, 2013 and $41 million at December 31, 2012.

Schedule Of Investment Securities



In Millions
	March 31, 2013												December 31, 2012
				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		$	139		$	2		$	-		$	141		$	123		$	3		$	-		$	126
Held to maturity
Debt securities			9			-			-			9			9			1			-			10
Consumers
Available for sale
DB SERP
Mutual funds		$	97		$	2		$	-		$	99		$	83		$	2		$	-		$	85
CMS Energy
common stock			5			25			-			30			6			26			-			32

Consumers Energy Company [Member]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments



In Millions
	March 31, 2013															December 31, 2012
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Securities held to maturity		$	9		$	9		$	-		$	9		$	-		$	9		$	10		$	-		$	10		$	-
Notes receivable¹			541			576			-			-			576			544			581			-			-			581
Long-term debt²			7,452			8,656			-			7,614			1,042			7,229			8,347			-			7,321			1,026
Consumers
Long-term debt³		$	4,327		$	5,002		$	-		$	3,960		$	1,042		$	4,338		$	5,015		$	-		$	3,989		$	1,026

¹	Includes current portion of notes receivable of $47 million at March 31, 2013 and $40 million at December 31, 2012.

²	Includes current portion of long-term debt of $711 million at March 31, 2013 and $519 million at December 31, 2012.

³	Includes current portion of long-term debt of $241 million at March 31, 2013 and $41 million at December 31, 2012.

Schedule Of Investment Securities



In Millions
	March 31, 2013												December 31, 2012
				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		$	139		$	2		$	-		$	141		$	123		$	3		$	-		$	126
Held to maturity
Debt securities			9			-			-			9			9			1			-			10
Consumers
Available for sale
DB SERP
Mutual funds		$	97		$	2		$	-		$	99		$	83		$	2		$	-		$	85
CMS Energy
common stock			5			25			-			30			6			26			-			32

- 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

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

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

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 45

-Paragraph 2

-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

-Paragraph 12

-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

-SubTopic 10

-Section 50

-Paragraph 30

-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