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Summary of Significant Accounting and Reporting Policies (Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current: |  |
Storm reserve deficiency | $ 0 | $ 203
Other | 336 | 321
Total | 336 | 524
Noncurrent: |  |
Purchased power agreement termination | 963 | 636
Other | 1,506 | 1,258
Total | 2,469 | 1,894
Current: |  |
Derivatives | 0 | 208
Deferred clause revenues | 296 | 86
Other | 50 | 5
Total | 346 | 299
Noncurrent: |  |
Accrued asset removal costs | 601 | 1,956
Asset retirement obligation regulatory expense difference | 2,569 | 2,294
Deferred Tax Liabilities, Net, Noncurrent | 4,981 | 96
Other | 614 | 560
Total | 8,765 | 4,906
FPL[Member] |  |
Current: |  |
Storm reserve deficiency | 0 | 203
Other | 335 | 321
Total | 335 | 524
Noncurrent: |  |
Purchased power agreement termination | 963 | 636
Other | 1,286 | 937
Total | 2,249 | 1,573
Current: |  |
Derivatives | 0 | 208
Deferred clause revenues | 296 | 86
Other | 37 | 0
Total | 333 | 294
Noncurrent: |  |
Accrued asset removal costs | 585 | 1,944
Asset retirement obligation regulatory expense difference | 2,569 | 2,294
Deferred Tax Liabilities, Net, Noncurrent | 4,903 | 96
Other | 585 | 559
Total | $ 8,642 | $ 4,893

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- Definition Carrying amount as of the balance sheet date of other regulatory assets, not separately disclosed in the balance sheet due to materiality considerations, of regulated entities that are not expected to be returned to ratepayers within one year. + References No definition available. + Details
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- Definition The regulatory liability as of the balance sheet date for the amount recoverable from ratepayers for removal costs associated with utility plant in service which are not recognized as a liability under Statement of Financial Accounting Standards No.143, "Accounting for Asset Retirement Obligations" and FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations." + References No definition available. + Details
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- Definition The regulatory liability as of the balance sheet date for the difference between the expense recognized under Statement of Financial Accounting Standards No.143, "Accounting for Asset Retirement Obligations" and FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations," and the amount recoverable from ratepayers. + References No definition available. + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets and liabilities. + References Reference 1: 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=84230637&loc=d3e32632-109319 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=96869850&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 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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