XML 44 R25.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Financial Instruments (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2017
Schedule Of Carrying Amounts And Fair Values Of Financial Instruments |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2017 |  | December 31, 2016 |
﻿ |  | Fair Value |  |  | Fair Value |
﻿ | Carrying |  |  |  | Level |  | Carrying |  |  |  | Level |
﻿ | Amount | Total | 1 | 2 | 3 |  | Amount | Total | 1 | 2 | 3 |
﻿CMS Energy, including Consumers |
﻿Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term receivables1 |  | $ | 20 |  | $ | 20 |  | $ | - |  | $ | - |  | $ | 20 |  |  | $ | 22 |  | $ | 22 |  | $ | - |  | $ | - |  | $ | 22 |
﻿Notes receivable2 |  |  | 1,325 |  |  | 1,411 |  |  | - |  |  | - |  |  | 1,411 |  |  |  | 1,326 |  |  | 1,415 |  |  | - |  |  | - |  |  | 1,415 |
﻿Securities held to maturity |  |  | 13 |  |  | 13 |  |  | - |  |  | 13 |  |  | - |  |  |  | 13 |  |  | 13 |  |  | - |  |  | 13 |  |  | - |
﻿Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt3 |  |  | 9,910 |  |  | 10,435 |  |  | - |  |  | 9,463 |  |  | 972 |  |  |  | 9,504 |  |  | 9,953 |  |  | - |  |  | 8,990 |  |  | 963 |
﻿Long-term payables4 |  |  | 17 |  |  | 18 |  |  | - |  |  | - |  |  | 18 |  |  |  | 17 |  |  | 17 |  |  | - |  |  | - |  |  | 17 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term receivables1 |  | $ | 20 |  | $ | 20 |  | $ | - |  | $ | - |  | $ | 20 |  |  | $ | 22 |  | $ | 22 |  | $ | - |  | $ | - |  | $ | 22 |
﻿Notes receivable5 |  |  | 46 |  |  | 46 |  |  | - |  |  | - |  |  | 46 |  |  |  | 45 |  |  | 45 |  |  | - |  |  | - |  |  | 45 |
﻿Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt6 |  |  | 5,712 |  |  | 6,045 |  |  | - |  |  | 5,073 |  |  | 972 |  |  |  | 5,628 |  |  | 5,903 |  |  | - |  |  | 4,940 |  |  | 963 |
﻿ 1 Includes current accounts receivable of $13 million at June 30, 2017 and $12 million at December 31, 2016. 2 Includes current portion of notes receivable of $211 million at June 30, 2017 and $219 million at December 31, 2016. 3 Includes current portion of long-term debt of $819 million at June 30, 2017 and $864 million at December 31, 2016. 4 Includes current portion of long-term payables of $1 million at June 30, 2017 and December 31, 2016. 5 Includes current portion of notes receivable of $30 million at June 30, 2017 and $29 million at December 31, 2016. 6 Includes current portion of long-term debt of $373 million at June 30, 2017 and $375 million at December 31, 2016.
Schedule Of Investment Securities |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2017 |  | December 31, 2016 |
﻿ |  | Unrealized | Unrealized | Fair |  |  | Unrealized | Unrealized | Fair |
﻿ | Cost | Gains | Losses | Value |  | Cost | Gains | Losses | Value |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿DB SERP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Mutual funds |  | $ | 142 |  | $ | 2 |  | $ | - |  | $ | 144 |  |  | $ | 141 |  | $ | - |  | $ | - |  | $ | 141 |
﻿Held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Debt securities |  |  | 13 |  |  | - |  |  | - |  |  | 13 |  |  |  | 13 |  |  | - |  |  | - |  |  | 13 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿DB SERP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Mutual funds |  | $ | 103 |  | $ | 1 |  | $ | - |  | $ | 104 |  |  | $ | 102 |  | $ | - |  | $ | - |  | $ | 102 |
﻿CMS Energy common stock |  |  | 2 |  |  | 18 |  |  | - |  |  | 20 |  |  |  | 4 |  |  | 29 |  |  | - |  |  | 33 |
﻿
Consumers Energy Company [Member] |
Schedule Of Carrying Amounts And Fair Values Of Financial Instruments |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2017 |  | December 31, 2016 |
﻿ |  | Fair Value |  |  | Fair Value |
﻿ | Carrying |  |  |  | Level |  | Carrying |  |  |  | Level |
﻿ | Amount | Total | 1 | 2 | 3 |  | Amount | Total | 1 | 2 | 3 |
﻿CMS Energy, including Consumers |
﻿Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term receivables1 |  | $ | 20 |  | $ | 20 |  | $ | - |  | $ | - |  | $ | 20 |  |  | $ | 22 |  | $ | 22 |  | $ | - |  | $ | - |  | $ | 22 |
﻿Notes receivable2 |  |  | 1,325 |  |  | 1,411 |  |  | - |  |  | - |  |  | 1,411 |  |  |  | 1,326 |  |  | 1,415 |  |  | - |  |  | - |  |  | 1,415 |
﻿Securities held to maturity |  |  | 13 |  |  | 13 |  |  | - |  |  | 13 |  |  | - |  |  |  | 13 |  |  | 13 |  |  | - |  |  | 13 |  |  | - |
﻿Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt3 |  |  | 9,910 |  |  | 10,435 |  |  | - |  |  | 9,463 |  |  | 972 |  |  |  | 9,504 |  |  | 9,953 |  |  | - |  |  | 8,990 |  |  | 963 |
﻿Long-term payables4 |  |  | 17 |  |  | 18 |  |  | - |  |  | - |  |  | 18 |  |  |  | 17 |  |  | 17 |  |  | - |  |  | - |  |  | 17 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term receivables1 |  | $ | 20 |  | $ | 20 |  | $ | - |  | $ | - |  | $ | 20 |  |  | $ | 22 |  | $ | 22 |  | $ | - |  | $ | - |  | $ | 22 |
﻿Notes receivable5 |  |  | 46 |  |  | 46 |  |  | - |  |  | - |  |  | 46 |  |  |  | 45 |  |  | 45 |  |  | - |  |  | - |  |  | 45 |
﻿Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Long-term debt6 |  |  | 5,712 |  |  | 6,045 |  |  | - |  |  | 5,073 |  |  | 972 |  |  |  | 5,628 |  |  | 5,903 |  |  | - |  |  | 4,940 |  |  | 963 |
﻿ 1 Includes current accounts receivable of $13 million at June 30, 2017 and $12 million at December 31, 2016. 2 Includes current portion of notes receivable of $211 million at June 30, 2017 and $219 million at December 31, 2016. 3 Includes current portion of long-term debt of $819 million at June 30, 2017 and $864 million at December 31, 2016. 4 Includes current portion of long-term payables of $1 million at June 30, 2017 and December 31, 2016. 5 Includes current portion of notes receivable of $30 million at June 30, 2017 and $29 million at December 31, 2016. 6 Includes current portion of long-term debt of $373 million at June 30, 2017 and $375 million at December 31, 2016.
Schedule Of Investment Securities |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿In Millions
﻿ | June 30, 2017 |  | December 31, 2016 |
﻿ |  | Unrealized | Unrealized | Fair |  |  | Unrealized | Unrealized | Fair |
﻿ | Cost | Gains | Losses | Value |  | Cost | Gains | Losses | Value |
﻿CMS Energy, including Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿DB SERP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Mutual funds |  | $ | 142 |  | $ | 2 |  | $ | - |  | $ | 144 |  |  | $ | 141 |  | $ | - |  | $ | - |  | $ | 141 |
﻿Held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Debt securities |  |  | 13 |  |  | - |  |  | - |  |  | 13 |  |  |  | 13 |  |  | - |  |  | - |  |  | 13 |
﻿Consumers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿DB SERP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Mutual funds |  | $ | 103 |  | $ | 1 |  | $ | - |  | $ | 104 |  |  | $ | 102 |  | $ | - |  | $ | - |  | $ | 102 |
﻿CMS Energy common stock |  |  | 2 |  |  | 18 |  |  | - |  |  | 20 |  |  |  | 4 |  |  | 29 |  |  | - |  |  | 33 |
﻿

X
- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
Name: | us-gaap_FairValueByBalanceSheetGroupingTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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