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Income Taxes (Principal Components Of Deferred Income Tax Assets) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Employee benefits | $ (99) | $ 3
Gas inventory | (130) | (147)
Property, plant and equipment | (1,856) | (1,783)
Net regulatory tax liability | 86 | 131
Reserves and accruals | 57 | 71
Securitized costs | (190) | (73)
Tax loss and credit carryforwards | 629 | 733
Other | 15 | (15)
Gross Deferred Tax Liabilities | (1,488) | (1,080)
Less: valuation allowance | (2) | (3)
Total net deferred income tax liabilities | (1,490) | (1,083)
Deferred tax assets, net of valuation reserves | 785 | 935
Deferred tax liabilities | (2,275) | (2,018)
Consumers Energy Company [Member] |  |
Employee benefits | (119) | (36)
Gas inventory | (130) | (147)
Property, plant and equipment | (1,911) | (1,848)
Net regulatory tax liability | 86 | 131
Reserves and accruals | 31 | 41
Securitized costs | (190) | (73)
Tax loss and credit carryforwards | 48 | 61
Other | 16 | (13)
Gross Deferred Tax Liabilities | (2,169) | (1,884)
Less: valuation allowance | (1) | (1)
Total net deferred income tax liabilities | (2,170) | (1,885)
Deferred tax assets, net of valuation reserves | 180 | 232
Deferred tax liabilities | $ (2,350) | $ (2,117)

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- Definition The tax effect as of the balance sheet date of the amount of future tax deductions arising from tax carryforwards and the excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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