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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2014
Assets And Liabilities Measured At Fair Value On A Recurring Basis |
In Millions
| CMS Energy, including Consumers |  | Consumers |
| March 31 |  | December 31 |  | March 31 |  | December 31 |
| 2014 |  | 2013 |  | 2014 |  | 2013 |
Assets 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 548 |  |  | $ | 87 |  |  | $ | 80 |  |  | $ | - |
Restricted cash equivalents |  |  | 15 |  |  |  | 16 |  |  |  | 15 |  |  |  | 15 |
CMS Energy common stock |  |  | - |  |  |  | - |  |  |  | 32 |  |  |  | 29 |
Nonqualified deferred compensation plan assets |  |  | 7 |  |  |  | 6 |  |  |  | 5 |  |  |  | 4 |
DB SERP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  | 2 |  |  |  | - |  |  |  | 1 |  |  |  | - |
Mutual funds |  |  | 133 |  |  |  | 136 |  |  |  | 94 |  |  |  | 95 |
Derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  | 2 |  |  |  | 5 |  |  |  | - |  |  |  | 4 |
Total |  | $ | 707 |  |  | $ | 250 |  |  | $ | 227 |  |  | $ | 147 |
Liabilities 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonqualified deferred compensation plan liabilities |  | $ | 7 |  |  | $ | 6 |  |  | $ | 5 |  |  | $ | 4 |
Derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  | - |  |  |  | 1 |  |  |  | - |  |  |  | - |
Total |  | $ | 7 |  |  | $ | 7 |  |  | $ | 5 |  |  | $ | 4 |
1 All assets and liabilities were classified as Level 1 with the exception of commodity contracts, which were classified as Level 2 or Level 3, and which were insignificant.
Consumers Energy Company [Member] |
Assets And Liabilities Measured At Fair Value On A Recurring Basis |
In Millions
| CMS Energy, including Consumers |  | Consumers |
| March 31 |  | December 31 |  | March 31 |  | December 31 |
| 2014 |  | 2013 |  | 2014 |  | 2013 |
Assets 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 548 |  |  | $ | 87 |  |  | $ | 80 |  |  | $ | - |
Restricted cash equivalents |  |  | 15 |  |  |  | 16 |  |  |  | 15 |  |  |  | 15 |
CMS Energy common stock |  |  | - |  |  |  | - |  |  |  | 32 |  |  |  | 29 |
Nonqualified deferred compensation plan assets |  |  | 7 |  |  |  | 6 |  |  |  | 5 |  |  |  | 4 |
DB SERP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  |  | 2 |  |  |  | - |  |  |  | 1 |  |  |  | - |
Mutual funds |  |  | 133 |  |  |  | 136 |  |  |  | 94 |  |  |  | 95 |
Derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  | 2 |  |  |  | 5 |  |  |  | - |  |  |  | 4 |
Total |  | $ | 707 |  |  | $ | 250 |  |  | $ | 227 |  |  | $ | 147 |
Liabilities 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonqualified deferred compensation plan liabilities |  | $ | 7 |  |  | $ | 6 |  |  | $ | 5 |  |  | $ | 4 |
Derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  |  | - |  |  |  | 1 |  |  |  | - |  |  |  | - |
Total |  | $ | 7 |  |  | $ | 7 |  |  | $ | 5 |  |  | $ | 4 |
1 All assets and liabilities were classified as Level 1 with the exception of commodity contracts, which were classified as Level 2 or Level 3, and which were insignificant.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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