v3.7.0.1

Income Taxes (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) MW | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) MW
Income Tax Contingency [Line Items] |  |  |  |
Effective income tax rate (as a percent) | 26.00% | 29.00% | 29.00% | 28.00%
Production tax credits | $ 30 | $ 31 | $ 58 | $ 73
Deferred income tax benefit associated with convertible investment tax credits | $ 42 | 43 | $ 169 | $ 79
Production tax credit (PTC), roll off period |  |  | 10 years |
Reorganization Value, Income Tax Benefits Associated with Reorganization of Certain Assets |  | 30 |  |
Merchant Natural Gas Generation Facilities [Member] | NextEra Energy Resources subsidiary [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income Tax Charge Related to Sale of Asset |  | $ 58 |  |
Renewable Energy Assets, Power Generation Capacity | MW |  | 2,884 |  | 2,884

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