XML 45 R22.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Contingencies And Commitments (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2015
Site Contingency [Line Items] |
Guarantees |
In Millions
|  |  | Maximum |  | Carrying |
Guarantee Description | Issue Date | Expiration Date | Obligation |  | Amount |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |
Indemnity obligations from asset sales and other agreements | Various | Various through August 2029 |  | $ | 148 | 1 |  | $ | 7 |
Guarantees | Various | Various through March 2021 |  |  | 51 |  |  |  | - |
Consumers |  |  |  |  |  |  |  |  |  |
Indemnity obligations and other guarantees | Various | Various through August 2029 |  | $ | 30 |  |  | $ | 1 |
| 1 |  | The majority of this amount arises from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy, other than Consumers, indemnified the purchaser for losses resulting from various matters, including claims related to tax disputes, claims related to power purchase agreements, and defects in title to the assets or stock sold to the purchaser by CMS Energy subsidiaries. Except for items described elsewhere in this Note, CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.
Schedule Of Guarantees, Other Information |
Guarantee Description | How Guarantee Arose | Events That Would Require Performance |
CMS Energy, including Consumers |  |  |
Indemnity obligations from asset sales and other agreements | Stock and asset sale agreements | Findings of misrepresentation, breach of warranties, tax claims, and other specific events or circumstances |
Guarantees | Normal operating activity | Nonperformance or non-payment by a subsidiary under a related contract |
Consumers |  |  |
Indemnity obligations and other guarantees | Normal operating activity | Nonperformance or claims made by a third party under a related contract |
Consumers Energy Company [Member] |
Site Contingency [Line Items] |
Expected Remediation Cost By Year |
In Millions
| 2015 | 2016 | 2017 | 2018 | 2019 |
Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remediation and other response activity costs |  | $ | 11 |  | $ | 12 |  | $ | 13 |  | $ | 11 |  | $ | 14 |
Guarantees |
In Millions
|  |  | Maximum |  | Carrying |
Guarantee Description | Issue Date | Expiration Date | Obligation |  | Amount |
CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |
Indemnity obligations from asset sales and other agreements | Various | Various through August 2029 |  | $ | 148 | 1 |  | $ | 7 |
Guarantees | Various | Various through March 2021 |  |  | 51 |  |  |  | - |
Consumers |  |  |  |  |  |  |  |  |  |
Indemnity obligations and other guarantees | Various | Various through August 2029 |  | $ | 30 |  |  | $ | 1 |
| 1 |  | The majority of this amount arises from stock and asset sale agreements under which CMS Energy or a subsidiary of CMS Energy, other than Consumers, indemnified the purchaser for losses resulting from various matters, including claims related to tax disputes, claims related to power purchase agreements, and defects in title to the assets or stock sold to the purchaser by CMS Energy subsidiaries. Except for items described elsewhere in this Note, CMS Energy believes the likelihood of material loss to be remote for the indemnity obligations not recorded as liabilities.
Schedule Of Guarantees, Other Information |
Guarantee Description | How Guarantee Arose | Events That Would Require Performance |
CMS Energy, including Consumers |  |  |
Indemnity obligations from asset sales and other agreements | Stock and asset sale agreements | Findings of misrepresentation, breach of warranties, tax claims, and other specific events or circumstances |
Guarantees | Normal operating activity | Nonperformance or non-payment by a subsidiary under a related contract |
Consumers |  |  |
Indemnity obligations and other guarantees | Normal operating activity | Nonperformance or claims made by a third party under a related contract |
Bay Harbor [Member] |
Site Contingency [Line Items] |
Expected Remediation Cost By Year |
In Millions
| 2015 | 2016 | 2017 | 2018 | 2019 |
CMS Energy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term liquid disposal and operating and maintenance costs |  | $ | 7 |  | $ | 6 |  | $ | 5 |  | $ | 5 |  | $ | 5 |

X
- Definition The expected remediation costs to be incurred over the next five years. + References No definition available. + Details
Name: | cms_ExpectedRemediationCostsByYearTableTextBlock
Namespace Prefix: | cms_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Guarantees, Other Information + References No definition available. + Details
Name: | cms_ScheduleOfGuaranteesOtherInformationTableTextBlock
Namespace Prefix: | cms_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12265-110248 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_ScheduleOfGuaranteeObligationsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SiteContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=cms_ConsumersEnergyCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=cms_BayHarborMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |