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Income Taxes - Reconciliation Between the Effective Income Tax Rates and the Applicable Statutory Rate (Details) | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Effective Income Tax Rate Reconciliation [Line Items] |  |
Statutory federal income tax rate | 21.00% | 21.00%
Increases (reductions) resulting from: |  |
State income taxes - net of federal income tax benefit | 0.80% | (61.00%)
Taxes attributable to noncontrolling interests | 2.00% | 32.70%
PTCs and ITCs - NEER | (5.00%) | (86.50%)
Amortization of deferred regulatory credit | (1.90%) | (55.50%)
Foreign operations | 0.20% | (76.90%)
Other - net | (2.80%) | (95.70%)
Effective income tax rate | 14.30% | (321.90%)
FPL [Member] |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |
Statutory federal income tax rate | 21.00% | 21.00%
Increases (reductions) resulting from: |  |
State income taxes - net of federal income tax benefit | 4.40% | 4.30%
Taxes attributable to noncontrolling interests | 0.00% | 0.00%
PTCs and ITCs - NEER | 0.00% | 0.00%
Amortization of deferred regulatory credit | (3.40%) | (4.80%)
Foreign operations | 0.00% | 0.00%
Other - net | (0.80%) | (2.70%)
Effective income tax rate | 21.20% | 17.80%

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- Definition Effective Income Tax Rate Reconciliation, Increases (Decreases), Percent [Abstract] + References No definition available. + Details
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- Definition [Line Items] for Effective Income Tax Rate Reconciliation [Table] + References No definition available. + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 + Details
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