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Reportable Segments (Tables) | 6 Months Ended
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Jun. 30, 2016
Schedule Of Financial Information By Reportable Segments |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | Three Months Ended |  | Six Months Ended |
﻿June 30 | 2016 | 2015 |  | 2016 | 2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Operating revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 1,022 |  | $ | 1,007 |  |  | $ | 2,035 |  | $ | 2,040 |
﻿Gas utility |  |  | 271 |  |  | 274 |  |  |  | 981 |  |  | 1,269 |
﻿Enterprises |  |  | 49 |  |  | 45 |  |  |  | 97 |  |  | 105 |
﻿Other reconciling items |  |  | 29 |  |  | 24 |  |  |  | 59 |  |  | 47 |
﻿Total operating revenue – CMS Energy |  | $ | 1,371 |  | $ | 1,350 |  |  | $ | 3,172 |  | $ | 3,461 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Operating revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 1,022 |  | $ | 1,007 |  |  | $ | 2,035 |  | $ | 2,040 |
﻿Gas utility |  |  | 271 |  |  | 274 |  |  |  | 981 |  |  | 1,269 |
﻿Total operating revenue – Consumers |  | $ | 1,293 |  | $ | 1,281 |  |  | $ | 3,016 |  | $ | 3,309 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net income (loss) available to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 113 |  | $ | 82 |  |  | $ | 204 |  | $ | 176 |
﻿Gas utility |  |  | 18 |  |  | 1 |  |  |  | 99 |  |  | 122 |
﻿Enterprises |  |  | 3 |  |  | - |  |  |  | 9 |  |  | 7 |
﻿Other reconciling items |  |  | (10) |  |  | (16) |  |  |  | (24) |  |  | (36) |
﻿Total net income available to common stockholders – CMS Energy |  | $ | 124 |  | $ | 67 |  |  | $ | 288 |  | $ | 269 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net income available to common stockholder |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 113 |  | $ | 82 |  |  | $ | 204 |  | $ | 176 |
﻿Gas utility |  |  | 18 |  |  | 1 |  |  |  | 99 |  |  | 122 |
﻿Total net income available to common stockholder – Consumers |  | $ | 131 |  | $ | 83 |  |  | $ | 303 |  | $ | 298 |
﻿
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2016 | December 31, 2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Plant, property, and equipment, gross |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 14,297 |  | $ | 13,059 |
﻿Gas utility 1 |  |  | 6,014 |  |  | 5,723 |
﻿Enterprises |  |  | 160 |  |  | 120 |
﻿Other reconciling items |  |  | 26 |  |  | 41 |
﻿Total plant, property, and equipment, gross – CMS Energy |  | $ | 20,497 |  | $ | 18,943 |
﻿Consumers |  |  |  |  |  |  |
﻿Plant, property, and equipment, gross |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 14,297 |  | $ | 13,059 |
﻿Gas utility 1 |  |  | 6,014 |  |  | 5,723 |
﻿Other reconciling items |  |  | 15 |  |  | 15 |
﻿Total plant, property, and equipment, gross – Consumers |  | $ | 20,326 |  | $ | 18,797 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Total assets |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 12,901 |  | $ | 12,660 |
﻿Gas utility 1 |  |  | 5,744 |  |  | 5,912 |
﻿Enterprises |  |  | 267 |  |  | 270 |
﻿Other reconciling items |  |  | 1,551 |  |  | 1,457 |
﻿Total assets – CMS Energy 2 |  | $ | 20,463 |  | $ | 20,299 |
﻿Consumers |  |  |  |  |  |  |
﻿Total assets |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 12,902 |  | $ | 12,660 |
﻿Gas utility 1 |  |  | 5,744 |  |  | 5,912 |
﻿Other reconciling items |  |  | 56 |  |  | 63 |
﻿Total assets – Consumers 2 |  | $ | 18,702 |  | $ | 18,635 |
﻿
| 1 |  | Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
| 2 |  | CMS Energy and Consumers changed the reporting of debt issuance costs on their consolidated balance sheets in accordance with ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs, as of January 1, 2016, and retrospectively adjusted prior-period amounts for comparability. For further details on the implementation of this standard, see Note 1, New Accounting Standards.
Consumers Energy Company [Member] |
Schedule Of Financial Information By Reportable Segments |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | Three Months Ended |  | Six Months Ended |
﻿June 30 | 2016 | 2015 |  | 2016 | 2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Operating revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 1,022 |  | $ | 1,007 |  |  | $ | 2,035 |  | $ | 2,040 |
﻿Gas utility |  |  | 271 |  |  | 274 |  |  |  | 981 |  |  | 1,269 |
﻿Enterprises |  |  | 49 |  |  | 45 |  |  |  | 97 |  |  | 105 |
﻿Other reconciling items |  |  | 29 |  |  | 24 |  |  |  | 59 |  |  | 47 |
﻿Total operating revenue – CMS Energy |  | $ | 1,371 |  | $ | 1,350 |  |  | $ | 3,172 |  | $ | 3,461 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Operating revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 1,022 |  | $ | 1,007 |  |  | $ | 2,035 |  | $ | 2,040 |
﻿Gas utility |  |  | 271 |  |  | 274 |  |  |  | 981 |  |  | 1,269 |
﻿Total operating revenue – Consumers |  | $ | 1,293 |  | $ | 1,281 |  |  | $ | 3,016 |  | $ | 3,309 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net income (loss) available to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 113 |  | $ | 82 |  |  | $ | 204 |  | $ | 176 |
﻿Gas utility |  |  | 18 |  |  | 1 |  |  |  | 99 |  |  | 122 |
﻿Enterprises |  |  | 3 |  |  | - |  |  |  | 9 |  |  | 7 |
﻿Other reconciling items |  |  | (10) |  |  | (16) |  |  |  | (24) |  |  | (36) |
﻿Total net income available to common stockholders – CMS Energy |  | $ | 124 |  | $ | 67 |  |  | $ | 288 |  | $ | 269 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net income available to common stockholder |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Electric utility |  | $ | 113 |  | $ | 82 |  |  | $ | 204 |  | $ | 176 |
﻿Gas utility |  |  | 18 |  |  | 1 |  |  |  | 99 |  |  | 122 |
﻿Total net income available to common stockholder – Consumers |  | $ | 131 |  | $ | 83 |  |  | $ | 303 |  | $ | 298 |
﻿
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2016 | December 31, 2015 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Plant, property, and equipment, gross |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 14,297 |  | $ | 13,059 |
﻿Gas utility 1 |  |  | 6,014 |  |  | 5,723 |
﻿Enterprises |  |  | 160 |  |  | 120 |
﻿Other reconciling items |  |  | 26 |  |  | 41 |
﻿Total plant, property, and equipment, gross – CMS Energy |  | $ | 20,497 |  | $ | 18,943 |
﻿Consumers |  |  |  |  |  |  |
﻿Plant, property, and equipment, gross |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 14,297 |  | $ | 13,059 |
﻿Gas utility 1 |  |  | 6,014 |  |  | 5,723 |
﻿Other reconciling items |  |  | 15 |  |  | 15 |
﻿Total plant, property, and equipment, gross – Consumers |  | $ | 20,326 |  | $ | 18,797 |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |
﻿Total assets |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 12,901 |  | $ | 12,660 |
﻿Gas utility 1 |  |  | 5,744 |  |  | 5,912 |
﻿Enterprises |  |  | 267 |  |  | 270 |
﻿Other reconciling items |  |  | 1,551 |  |  | 1,457 |
﻿Total assets – CMS Energy 2 |  | $ | 20,463 |  | $ | 20,299 |
﻿Consumers |  |  |  |  |  |  |
﻿Total assets |  |  |  |  |  |  |
﻿Electric utility 1 |  | $ | 12,902 |  | $ | 12,660 |
﻿Gas utility 1 |  |  | 5,744 |  |  | 5,912 |
﻿Other reconciling items |  |  | 56 |  |  | 63 |
﻿Total assets – Consumers 2 |  | $ | 18,702 |  | $ | 18,635 |
﻿
| 1 |  | Amounts include a portion of Consumers’ other common assets attributable to both the electric and gas utility businesses.
| 2 |  | CMS Energy and Consumers changed the reporting of debt issuance costs on their consolidated balance sheets in accordance with ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs, as of January 1, 2016, and retrospectively adjusted prior-period amounts for comparability. For further details on the implementation of this standard, see Note 1, New Accounting Standards.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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