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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2016
Schedule of Change in Asset Retirement Obligation |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | ARO |  |  |  |  |  |  |  |  |  |  |  |  | ARO |
﻿ | Liability |  |  |  |  |  |  |  |  |  | Cash flow | Liability |
﻿Company and ARO Description | 12/31/2015 | Incurred | Settled | Accretion | Revisions | 12/31/2016 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Consumers |  | $ | 438 |  | $ | 3 |  | $ | (18) |  | $ | 23 |  | $ | - |  | $ | 446 |
﻿Gas treating plant and gas wells |  |  | 1 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 1 |
﻿Total CMS Energy |  | $ | 439 |  | $ | 3 |  | $ | (18) |  | $ | 23 |  | $ | - |  | $ | 447 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Coal ash disposal areas |  | $ | 200 |  | $ | - |  | $ | (8) |  | $ | 9 |  | $ | - |  | $ | 201 |
﻿Gas distribution cut, purge, and cap |  |  | 178 |  |  | 2 |  |  | (9) |  |  | 11 |  |  | - |  |  | 182 |
﻿Asbestos abatement |  |  | 54 |  |  | - |  |  | (1) |  |  | 3 |  |  | - |  |  | 56 |
﻿Renewable generation assets |  |  | 6 |  |  | 1 |  |  | - |  |  | - |  |  | - |  |  | 7 |
﻿Total Consumers |  | $ | 438 |  | $ | 3 |  | $ | (18) |  | $ | 23 |  | $ | - |  | $ | 446 |
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | ARO |  |  |  |  |  |  |  |  |  |  |  |  | ARO |
﻿ | Liability |  |  |  |  |  |  |  |  |  | Cash flow | Liability |
﻿Company and ARO Description | 12/31/2014 | Incurred | Settled | Accretion | Revisions | 12/31/2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Consumers |  | $ | 339 |  | $ | 11 |  | $ | (6) |  | $ | 20 |  | $ | 74 |  | $ | 438 |
﻿Gas treating plant and gas wells |  |  | 1 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 1 |
﻿Total CMS Energy |  | $ | 340 |  | $ | 11 |  | $ | (6) |  | $ | 20 |  | $ | 74 |  | $ | 439 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Coal ash disposal areas |  | $ | 120 |  | $ | - |  | $ | - |  | $ | 6 |  | $ | 74 |  | $ | 200 |
﻿Gas distribution cut, purge, and cap |  |  | 162 |  |  | 11 |  |  | (6) |  |  | 11 |  |  | - |  |  | 178 |
﻿Asbestos abatement |  |  | 51 |  |  | - |  |  | - |  |  | 3 |  |  | - |  |  | 54 |
﻿Renewable generation assets |  |  | 6 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 6 |
﻿Total Consumers |  | $ | 339 |  | $ | 11 |  | $ | (6) |  | $ | 20 |  | $ | 74 |  | $ | 438 |
﻿
Consumers Energy Company [Member] |
Schedule of Change in Asset Retirement Obligation |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | ARO |  |  |  |  |  |  |  |  |  |  |  |  | ARO |
﻿ | Liability |  |  |  |  |  |  |  |  |  | Cash flow | Liability |
﻿Company and ARO Description | 12/31/2015 | Incurred | Settled | Accretion | Revisions | 12/31/2016 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Consumers |  | $ | 438 |  | $ | 3 |  | $ | (18) |  | $ | 23 |  | $ | - |  | $ | 446 |
﻿Gas treating plant and gas wells |  |  | 1 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 1 |
﻿Total CMS Energy |  | $ | 439 |  | $ | 3 |  | $ | (18) |  | $ | 23 |  | $ | - |  | $ | 447 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Coal ash disposal areas |  | $ | 200 |  | $ | - |  | $ | (8) |  | $ | 9 |  | $ | - |  | $ | 201 |
﻿Gas distribution cut, purge, and cap |  |  | 178 |  |  | 2 |  |  | (9) |  |  | 11 |  |  | - |  |  | 182 |
﻿Asbestos abatement |  |  | 54 |  |  | - |  |  | (1) |  |  | 3 |  |  | - |  |  | 56 |
﻿Renewable generation assets |  |  | 6 |  |  | 1 |  |  | - |  |  | - |  |  | - |  |  | 7 |
﻿Total Consumers |  | $ | 438 |  | $ | 3 |  | $ | (18) |  | $ | 23 |  | $ | - |  | $ | 446 |
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | ARO |  |  |  |  |  |  |  |  |  |  |  |  | ARO |
﻿ | Liability |  |  |  |  |  |  |  |  |  | Cash flow | Liability |
﻿Company and ARO Description | 12/31/2014 | Incurred | Settled | Accretion | Revisions | 12/31/2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Consumers |  | $ | 339 |  | $ | 11 |  | $ | (6) |  | $ | 20 |  | $ | 74 |  | $ | 438 |
﻿Gas treating plant and gas wells |  |  | 1 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 1 |
﻿Total CMS Energy |  | $ | 340 |  | $ | 11 |  | $ | (6) |  | $ | 20 |  | $ | 74 |  | $ | 439 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Coal ash disposal areas |  | $ | 120 |  | $ | - |  | $ | - |  | $ | 6 |  | $ | 74 |  | $ | 200 |
﻿Gas distribution cut, purge, and cap |  |  | 162 |  |  | 11 |  |  | (6) |  |  | 11 |  |  | - |  |  | 178 |
﻿Asbestos abatement |  |  | 51 |  |  | - |  |  | - |  |  | 3 |  |  | - |  |  | 54 |
﻿Renewable generation assets |  |  | 6 |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 6 |
﻿Total Consumers |  | $ | 339 |  | $ | 11 |  | $ | (6) |  | $ | 20 |  | $ | 74 |  | $ | 438 |
﻿

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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