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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2011
Schedule of Change in Asset Retirement Obligation Table |
In Millions |
Company and ARO Description |  |  | ARO Liability 12/31/10 |  |  |  | Incurred |  |  |  | Settled |  |  |  | Accretion |  |  |  | Cash flow Revisions |  |  |  | ARO Liability 12/31/11 |
CMS ENERGY, INCLUDING CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Close gas treating plant and gas wells |  | $ | 1 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 1 |
Consumers |  |  | 244 |  |  |  | (2 | ) |  |  | (7 | ) |  |  | 18 |  |  |  | - |  |  |  | 253 |
Total CMS Energy |  | $ | 245 |  |  | $ | (2 | ) |  | $ | (7 | ) |  | $ | 18 |  |  | $ | - |  |  | $ | 254 |
CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 66 |  |  | $ | - |  |  | $ | (2 | ) |  | $ | 6 |  |  | $ | - |  |  | $ | 70 |
Wells at gas storage fields |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1 |
Indoor gas services relocations |  |  | 1 |  |  |  | - |  |  |  | (1 | ) |  |  | - |  |  |  | - |  |  |  | - |
Asbestos abatement |  |  | 40 |  |  |  | - |  |  |  | (1 | ) |  |  | 3 |  |  |  | - |  |  |  | 42 |
Gas distribution cut, purge, and cap |  |  | 136 |  |  |  | (2 | ) |  |  | (3 | ) |  |  | 9 |  |  |  | - |  |  |  | 140 |
Total Consumers |  | $ | 244 |  |  | $ | (2 | ) |  | $ | (7 | ) |  | $ | 18 |  |  | $ | - |  |  | $ | 253 |
In Millions |
Company and ARO Description |  |  | ARO Liability 12/31/09 |  |  |  | Incurred |  |  |  | Settled |  |  |  | Accretion |  |  |  | Cash flow Revisions |  |  |  | ARO Liability 12/31/10 |
CMS ENERGY, INCLUDING CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Close gas treating plant and gas wells |  | $ | 1 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 1 |
Consumers |  |  | 228 |  |  |  | 6 |  |  |  | (7 | ) |  |  | 17 |  |  |  | - |  |  |  | 244 |
Total CMS Energy |  | $ | 229 |  |  | $ | 6 |  |  | $ | (7 | ) |  | $ | 17 |  |  | $ | - |  |  | $ | 245 |
CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 64 |  |  | $ | - |  |  | $ | (4 | ) |  | $ | 6 |  |  | $ | - |  |  | $ | 66 |
Wells at gas storage fields |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1 |
Indoor gas services relocations |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1 |
Asbestos abatement |  |  | 38 |  |  |  | - |  |  |  | (1 | ) |  |  | 3 |  |  |  | - |  |  |  | 40 |
Gas distribution cut, purge, and cap |  |  | 124 |  |  |  | 6 |  |  |  | (2 | ) |  |  | 8 |  |  |  | - |  |  |  | 136 |
Total Consumers |  | $ | 228 |  |  | $ | 6 |  |  | $ | (7 | ) |  | $ | 17 |  |  | $ | - |  |  | $ | 244 |
Consumers Energy Company [Member] |
Schedule of Change in Asset Retirement Obligation Table |
In Millions |
Company and ARO Description |  |  | ARO Liability 12/31/10 |  |  |  | Incurred |  |  |  | Settled |  |  |  | Accretion |  |  |  | Cash flow Revisions |  |  |  | ARO Liability 12/31/11 |
CMS ENERGY, INCLUDING CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Close gas treating plant and gas wells |  | $ | 1 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 1 |
Consumers |  |  | 244 |  |  |  | (2 | ) |  |  | (7 | ) |  |  | 18 |  |  |  | - |  |  |  | 253 |
Total CMS Energy |  | $ | 245 |  |  | $ | (2 | ) |  | $ | (7 | ) |  | $ | 18 |  |  | $ | - |  |  | $ | 254 |
CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 66 |  |  | $ | - |  |  | $ | (2 | ) |  | $ | 6 |  |  | $ | - |  |  | $ | 70 |
Wells at gas storage fields |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1 |
Indoor gas services relocations |  |  | 1 |  |  |  | - |  |  |  | (1 | ) |  |  | - |  |  |  | - |  |  |  | - |
Asbestos abatement |  |  | 40 |  |  |  | - |  |  |  | (1 | ) |  |  | 3 |  |  |  | - |  |  |  | 42 |
Gas distribution cut, purge, and cap |  |  | 136 |  |  |  | (2 | ) |  |  | (3 | ) |  |  | 9 |  |  |  | - |  |  |  | 140 |
Total Consumers |  | $ | 244 |  |  | $ | (2 | ) |  | $ | (7 | ) |  | $ | 18 |  |  | $ | - |  |  | $ | 253 |
In Millions |
Company and ARO Description |  |  | ARO Liability 12/31/09 |  |  |  | Incurred |  |  |  | Settled |  |  |  | Accretion |  |  |  | Cash flow Revisions |  |  |  | ARO Liability 12/31/10 |
CMS ENERGY, INCLUDING CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Close gas treating plant and gas wells |  | $ | 1 |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 1 |
Consumers |  |  | 228 |  |  |  | 6 |  |  |  | (7 | ) |  |  | 17 |  |  |  | - |  |  |  | 244 |
Total CMS Energy |  | $ | 229 |  |  | $ | 6 |  |  | $ | (7 | ) |  | $ | 17 |  |  | $ | - |  |  | $ | 245 |
CONSUMERS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coal ash disposal areas |  | $ | 64 |  |  | $ | - |  |  | $ | (4 | ) |  | $ | 6 |  |  | $ | - |  |  | $ | 66 |
Wells at gas storage fields |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1 |
Indoor gas services relocations |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1 |
Asbestos abatement |  |  | 38 |  |  |  | - |  |  |  | (1 | ) |  |  | 3 |  |  |  | - |  |  |  | 40 |
Gas distribution cut, purge, and cap |  |  | 124 |  |  |  | 6 |  |  |  | (2 | ) |  |  | 8 |  |  |  | - |  |  |  | 136 |
Total Consumers |  | $ | 228 |  |  | $ | 6 |  |  | $ | (7 | ) |  | $ | 17 |  |  | $ | - |  |  | $ | 244 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 410 -SubTopic 30 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 5 -Section 50 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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