XML 115 R119.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Reportable Segments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Operating Revenue | $ 1,670 | $ 1,507 | $ 1,333 | $ 1,743 | $ 1,620 | $ 1,464 | $ 1,364 | $ 2,055 | $ 6,253 | $ 6,503 | $ 6,432
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 598 | 546 | 576
Income (loss) from equity method investees |  |  |  |  |  |  |  |  | 17 | 9 | 11
Interest Expense |  |  |  |  |  |  |  |  | 389 | 415 | 431
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | 245 | 191 | 224
Total Net Income Available to Common Stockholders | 67 | 148 | 100 | 67 | 41 | 139 | 100 | 135 | 382 | 415 | 324
Total Plant, Property, and Equipment, Gross | 15,592 |  |  |  | 14,751 |  |  |  | 15,592 | 14,751 | 14,145
Equity Method Investments | 57 |  |  |  | 50 |  |  |  | 57 | 50 | 49
Total Assets | 17,131 |  |  |  | 16,452 |  |  |  | 17,131 | 16,452 | 15,616
Capital Expenditures |  |  |  |  |  |  |  |  | 1,266 | 928 | 883
International [Member] |  |  |  |  |  |  |  |  |  |  |
Total Assets |  |  |  |  | 1 |  |  |  |  | 1 | 3
Consumers Energy Company [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Revenue | 1,608 | 1,448 | 1,282 | 1,675 | 1,565 | 1,397 | 1,303 | 1,988 | 6,013 | 6,253 | 6,156
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 592 | 542 | 572
Interest Expense |  |  |  |  |  |  |  |  | 244 | 265 | 277
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | 297 | 267 | 254
Total Net Income Available to Common Stockholders | 78 | 162 | 121 | 76 | 67 | 154 | 91 | 153 | 437 | 465 | 432
Total Plant, Property, and Equipment, Gross | 15,456 |  |  |  | 14,621 |  |  |  | 15,456 | 14,621 | 14,022
Total Assets | 16,275 |  |  |  | 15,662 |  |  |  | 16,275 | 15,662 | 14,839
Capital Expenditures |  |  |  |  |  |  |  |  | 1,261 | 922 | 877
Electric Utility [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  | 4,031 | 3,913 | 3,802
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 459 | 412 | 450
Interest Expense |  |  |  |  |  |  |  |  | 179 | 192 | 202
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | 227 | 190 | 187
Total Net Income Available to Common Stockholders |  |  |  |  |  |  |  |  | 325 | 333 | 303
Total Plant, Property, and Equipment, Gross | 11,041 |  |  |  | 10,400 |  |  |  | 11,041 | 10,400 | 9,944
Total Assets | 10,423 |  |  |  | 9,938 |  |  |  | 10,423 | 9,938 | 9,321
Capital Expenditures |  |  |  |  |  |  |  |  | 921 | 661 | 642
Electric Utility [Member] | Consumers Energy Company [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  | 4,031 | 3,913 | 3,802
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 459 | 412 | 450
Interest Expense |  |  |  |  |  |  |  |  | 179 | 192 | 202
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | 227 | 190 | 187
Total Net Income Available to Common Stockholders |  |  |  |  |  |  |  |  | 325 | 333 | 303
Total Plant, Property, and Equipment, Gross | 11,041 |  |  |  | 10,400 |  |  |  | 11,041 | 10,400 | 9,944
Total Assets | 10,423 |  |  |  | 9,938 |  |  |  | 10,423 | 9,938 | 9,321
Capital Expenditures |  |  |  |  |  |  |  |  | 921 | 661 | 642
Gas Utility [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  | 1,982 | 2,340 | 2,354
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 133 | 130 | 122
Interest Expense |  |  |  |  |  |  |  |  | 63 | 71 | 73
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | 70 | 77 | 67
Total Net Income Available to Common Stockholders |  |  |  |  |  |  |  |  | 110 | 130 | 127
Total Plant, Property, and Equipment, Gross | 4,400 |  |  |  | 4,206 |  |  |  | 4,400 | 4,206 | 4,063
Total Assets | 5,016 |  |  |  | 4,956 |  |  |  | 5,016 | 4,956 | 4,614
Capital Expenditures |  |  |  |  |  |  |  |  | 340 | 261 | 235
Gas Utility [Member] | Consumers Energy Company [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  | 1,982 | 2,340 | 2,354
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 133 | 130 | 122
Interest Expense |  |  |  |  |  |  |  |  | 63 | 71 | 73
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | 70 | 77 | 67
Total Net Income Available to Common Stockholders |  |  |  |  |  |  |  |  | 110 | 130 | 127
Total Plant, Property, and Equipment, Gross | 4,400 |  |  |  | 4,206 |  |  |  | 4,400 | 4,206 | 4,063
Total Assets | 5,016 |  |  |  | 4,956 |  |  |  | 5,016 | 4,956 | 4,614
Capital Expenditures |  |  |  |  |  |  |  |  | 340 | 261 | 235
Enterprises [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  | 183 | 204 | 238
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 4 | 3 | 3
Income (loss) from equity method investees |  |  |  |  |  |  |  |  | 17 | 9 | 11
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | (1) | (24) | 14
Total Net Income Available to Common Stockholders |  |  |  |  |  |  |  |  | 16 | 32 | 36
Total Plant, Property, and Equipment, Gross | 113 |  |  |  | 109 |  |  |  | 113 | 109 | 102
Equity Method Investments | 55 |  |  |  | 49 |  |  |  | 55 | 49 | 48
Total Assets | 181 |  |  |  | 242 |  |  |  | 181 | 242 | 191
Capital Expenditures |  |  |  |  |  |  |  |  | 1 | 5 | 4
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  | 57 | 46 | 38
Other Depreciation and amortization |  |  |  |  |  |  |  |  | 2 | 1 | 1
Interest Expense |  |  |  |  |  |  |  |  | 147 | 152 | 156
Income Tax Expense/Benefit |  |  |  |  |  |  |  |  | (51) | (52) | (44)
Total Net Income Available to Common Stockholders |  |  |  |  |  |  |  |  | (69) | (80) | (142)
Total Plant, Property, and Equipment, Gross | 38 |  |  |  | 36 |  |  |  | 38 | 36 | 36
Equity Method Investments | 2 |  |  |  | 1 |  |  |  | 2 | 1 | 1
Total Assets | 1,511 |  |  |  | 1,316 |  |  |  | 1,511 | 1,316 | 1,490
Capital Expenditures |  |  |  |  |  |  |  |  | 4 | 1 | 2
Other [Member] | Consumers Energy Company [Member] |  |  |  |  |  |  |  |  |  |  |
Interest Expense |  |  |  |  |  |  |  |  | 2 | 2 | 2
Total Net Income Available to Common Stockholders |  |  |  |  |  |  |  |  | 2 | 2 | 2
Total Plant, Property, and Equipment, Gross | 15 |  |  |  | 15 |  |  |  | 15 | 15 | 15
Total Assets | 836 |  |  |  | 768 |  |  |  | 836 | 768 | 904
Maximum [Member] | International [Member] |  |  |  |  |  |  |  |  |  |  |
Total Assets | $ 1 |  |  |  |  |  |  |  | $ 1 |  |

X
- Definition Carrying amount at the balance sheet date for long-lived assets used in the normal conduct of business and not intended for resale. This can include land, physical structures, machinery, vehicles, furniture, computer equipment, similar items, including certain intangible assets. Amount is not net of depreciation, depletion, and amortization, and does not include construction work in progress. + References No definition available. + Details
Name: | cms_PlantAndPropertyGross
Namespace Prefix: | cms_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Concepts (CON) -Number 6 -Paragraph 25 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 + Details
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cost of borrowed funds accounted for as interest that was charged against earnings during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 9 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 9 -Chapter V -Subsection II -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.9) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_InterestExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The other noncash expense, not otherwise specified in the taxonomy, charged against earnings in the period to allocate the cost of tangible and intangible assets over their remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_OtherDepreciationAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_PaymentsToAcquireProductiveAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration