Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Financial Instruments [Line Items]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 6, Fair Value Measurements.

In Millions
	December 31, 2018															December 31, 2017
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Assets
Long-term receivables1		$	22		$	22		$	—		$	—		$	22		$	21		$	21		$	—		$	—		$	21
Notes receivable2		1,857			1,967			—			—			1,967			1,371			1,464			—			—			1,464
Securities held to maturity		22			21			—			21			—			16			16			—			16			—
Liabilities
Long-term debt3		11,589			11,630			459			9,404			1,767			10,204			10,715			—			9,363			1,352
Long-term payables4		27			27			—			—			27			27			26			—			—			26
Consumers
Assets
Long-term receivables1		$	22		$	22		$	—		$	—		$	22		$	21		$	21		$	—		$	—		$	21
Notes receivable5		—			—			—			—			—			17			17			—			—			17
Notes receivable – related party6		106			106			—			—			106			—			—			—			—			—
Liabilities
Long-term debt7		6,805			6,833			—			5,066			1,767			5,904			6,236			—			4,883			1,353

¹  Includes current accounts receivable of $14 million at December 31, 2018 and $14 million at December 31, 2017.

²  Includes current portion of notes receivable of $233 million at December 31, 2018 and $200 million at December 31, 2017. For further details, see Note 8, Notes Receivable.

³  Includes current portion of long-term debt of $1.0 billion at December 31, 2018 and $1.1 billion at December 31, 2017.

⁴  Includes current portion of long-term payables of $1 million at December 31, 2018 and $3 million at December 31, 2017.

⁵  Includes current portion of notes receivable of $17 million at December 31, 2017.

⁶  Includes current portion of notes receivable – related party of $7 million at December 31, 2018. For further details on this note receivable, see the DB SERP discussion below.

⁷  Includes current portion of long-term debt of $26 million at December 31, 2018 and $343 million at December 31, 2017.

Schedule Of Investment Securities

Presented in the following table are CMS Energy’s and Consumers’ investment securities classified as available for sale or held to maturity:

In Millions
	December 31, 2018												December 31, 2017
	Cost			Unrealized Gains			Unrealized Losses			Fair Value			Cost			Unrealized Gains			Unrealized Losses			Fair Value
CMS Energy, including Consumers
Available for sale
DB SERP securities		$	—		$	—		—			$	—		$	141		$	—		$	—		$	141
Held to maturity
Debt securities		22			—			1			21			16			—			—			16
Consumers
Available for sale
DB SERP securities		$	—		$	—		$	—		$	—		$	102		$	—		$	—		$	102
CMS Energy common stock		—			—			—			—			2			19			—			21

Schedule Of Sales Activity For Investment Securities

Presented in the following table is a summary of the sales activity for investment securities held within the DB SERP and classified as available for sale:

In Millions
Years Ended December 31	2018			2017			2016
CMS Energy, including Consumers
Proceeds from sales of investment securities		$	142		$	145		$	6
Consumers
Proceeds from sales of investment securities		$	103		$	105		$	4

Consumers Energy Company

Financial Instruments [Line Items]

Schedule Of Carrying Amounts And Fair Values Of Financial Instruments

For information about assets and liabilities recorded at fair value and for additional details regarding the fair value hierarchy, see Note 6, Fair Value Measurements.

In Millions
	December 31, 2018															December 31, 2017
				Fair Value															Fair Value
	Carrying						Level									Carrying						Level
	Amount			Total			1			2			3			Amount			Total			1			2			3
CMS Energy, including Consumers
Assets
Long-term receivables1		$	22		$	22		$	—		$	—		$	22		$	21		$	21		$	—		$	—		$	21
Notes receivable2		1,857			1,967			—			—			1,967			1,371			1,464			—			—			1,464
Securities held to maturity		22			21			—			21			—			16			16			—			16			—
Liabilities
Long-term debt3		11,589			11,630			459			9,404			1,767			10,204			10,715			—			9,363			1,352
Long-term payables4		27			27			—			—			27			27			26			—			—			26
Consumers
Assets
Long-term receivables1		$	22		$	22		$	—		$	—		$	22		$	21		$	21		$	—		$	—		$	21
Notes receivable5		—			—			—			—			—			17			17			—			—			17
Notes receivable – related party6		106			106			—			—			106			—			—			—			—			—
Liabilities
Long-term debt7		6,805			6,833			—			5,066			1,767			5,904			6,236			—			4,883			1,353

¹  Includes current accounts receivable of $14 million at December 31, 2018 and $14 million at December 31, 2017.

²  Includes current portion of notes receivable of $233 million at December 31, 2018 and $200 million at December 31, 2017. For further details, see Note 8, Notes Receivable.

³  Includes current portion of long-term debt of $1.0 billion at December 31, 2018 and $1.1 billion at December 31, 2017.

⁴  Includes current portion of long-term payables of $1 million at December 31, 2018 and $3 million at December 31, 2017.

⁵  Includes current portion of notes receivable of $17 million at December 31, 2017.

⁶  Includes current portion of notes receivable – related party of $7 million at December 31, 2018. For further details on this note receivable, see the DB SERP discussion below.

⁷  Includes current portion of long-term debt of $26 million at December 31, 2018 and $343 million at December 31, 2017.

Schedule Of Investment Securities

Presented in the following table are CMS Energy’s and Consumers’ investment securities classified as available for sale or held to maturity:

In Millions
	December 31, 2018												December 31, 2017
	Cost			Unrealized Gains			Unrealized Losses			Fair Value			Cost			Unrealized Gains			Unrealized Losses			Fair Value
CMS Energy, including Consumers
Available for sale
DB SERP securities		$	—		$	—		—			$	—		$	141		$	—		$	—		$	141
Held to maturity
Debt securities		22			—			1			21			16			—			—			16
Consumers
Available for sale
DB SERP securities		$	—		$	—		$	—		$	—		$	102		$	—		$	—		$	102
CMS Energy common stock		—			—			—			—			2			19			—			21

Schedule Of Sales Activity For Investment Securities

Presented in the following table is a summary of the sales activity for investment securities held within the DB SERP and classified as available for sale:

In Millions
Years Ended December 31	2018			2017			2016
CMS Energy, including Consumers
Proceeds from sales of investment securities		$	142		$	145		$	6
Consumers
Proceeds from sales of investment securities		$	103		$	105		$	4