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Income Taxes - Reconciliation Between the Effective Income Tax Rates and the Applicable Statutory Rate (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Effective Income Tax Rate Reconciliation [Line Items] |  |  |  |
Statutory federal income tax rate | 21.00% | 21.00% | 21.00% | 21.00%
Increases (reductions) resulting from: |  |  |  |
State income taxes - net of federal income tax benefit | 4.20% | 2.00% | 0.80% | 3.00%
Taxes attributable to noncontrolling interests | 2.40% | 1.60% | 3.90% | 1.80%
PTCs and ITCs - NEER | (5.70%) | (5.20%) | (9.90%) | (6.30%)
Amortization of deferred regulatory credit | (3.70%) | (9.20%) | (6.40%) | (7.70%)
Foreign operations | (0.20%) | (0.10%) | (4.30%) | 0.10%
Other - net | (3.90%) | (0.30%) | (8.80%) | (1.70%)
Effective income tax rate | 14.10% | 9.80% | (3.70%) | 10.20%
FPL [Member] |  |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |  |
Statutory federal income tax rate | 21.00% | 21.00% | 21.00% | 21.00%
Increases (reductions) resulting from: |  |  |  |
State income taxes - net of federal income tax benefit | 3.90% | 1.60% | 4.10% | 3.00%
Taxes attributable to noncontrolling interests | 0.00% | 0.00% | 0.00% | 0.00%
PTCs and ITCs - NEER | 0.00% | 0.00% | 0.00% | 0.00%
Amortization of deferred regulatory credit | (5.00%) | (15.60%) | (5.00%) | (9.60%)
Foreign operations | 0.00% | 0.00% | 0.00% | 0.00%
Other - net | (0.50%) | 0.10% | (1.50%) | (0.20%)
Effective income tax rate | 19.40% | 7.10% | 18.60% | 14.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amortization, Amount |  | $ 83 |  | $ 83
Amortization Of Excess Deferred Income Taxes |  | $ 870 |  | $ 870

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