Summary of Significant Accounting and Reporting Policies	3 Months Ended
Mar. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting and Reporting Policies	Summary of Significant Accounting and Reporting Policies Revenue Recognition - In May 2014, the FASB issued an accounting standards update which provides guidance on the recognition of revenue from contracts with customers and requires additional disclosures about the nature, amount, timing and uncertainty of revenue and cash flows from an entity's contracts with customers. The standards update will be effective for NEE and FPL beginning January 1, 2018 with early adoption on January 1, 2017 permitted. The standards update may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as an adjustment to retained earnings as of the date of initial application (modified retrospective method). NEE and FPL are currently reviewing individual contracts within various identified revenue streams in order to determine the impact, if any, this standards update will have on their consolidated financial statements. A number of industry-specific implementation issues are still unresolved and the final resolution of certain of these issues could impact NEE's and/or FPL's current accounting policies and/or revenue recognition patterns. NEE and FPL currently anticipate adopting the standards update on January 1, 2018 using the modified retrospective method. Accounting for Partial Sales of Nonfinancial Assets - In February 2017, the FASB issued an accounting standards update regarding the accounting for partial sales of nonfinancial assets. NEE and FPL anticipate adopting the standards update on January 1, 2018, concurrent with the FASB's new revenue recognition standard. The standards update may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as an adjustment to retained earnings as of the date of initial application. NEE and FPL are currently evaluating the effect the adoption of this standards update will have on their consolidated financial statements. Electric Plant, Depreciation and Amortization - NEER reviews the estimated useful lives of its fixed assets on an ongoing basis. NEER's most recent review indicated that the actual lives of certain equipment at its wind plants are expected to be longer than those previously estimated for depreciation purposes. As a result, effective January 1, 2017, NEER changed the estimated useful lives of certain wind plant equipment from 30 years to 35 years to better reflect the period during which these assets are expected to remain in service. This change increased net income attributable to NEE by approximately $15 million and basic and diluted earnings per share attributable to NEE by approximately $0.03 for the three months ended March 31, 2017. For the year ended December 31, 2017 the change is expected to increase net income attributable to NEE by approximately $60 million. Assets and Liabilities Associated with Assets Held for Sale - In January 2017, an indirect wholly owned subsidiary of NEE completed the sale of its membership interests in its fiber-optic telecommunications business for net cash proceeds of approximately $1.1 billion, after repayment of $370 million of related long-term debt. In connection with the sale and the related consolidating state income tax effects, a gain of approximately $1.1 billion (approximately $685 million after tax) was recorded in NEE's condensed consolidated statements of income during the three months ended March 31, 2017. The carrying amounts of the major classes of assets and liabilities that were classified as held for sale on NEE's condensed consolidated balance sheets as of December 31, 2016 primarily represent property, plant and equipment and the related long-term debt.

Summary of Significant Accounting and Reporting Policies

Revenue Recognition - In May 2014, the FASB issued an accounting standards update which provides guidance on the recognition of revenue from contracts with customers and requires additional disclosures about the nature, amount, timing and uncertainty of revenue and cash flows from an entity's contracts with customers. The standards update will be effective for NEE and FPL beginning January 1, 2018 with early adoption on January 1, 2017 permitted. The standards update may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as an adjustment to retained earnings as of the date of initial application (modified retrospective method).

NEE and FPL are currently reviewing individual contracts within various identified revenue streams in order to determine the impact, if any, this standards update will have on their consolidated financial statements. A number of industry-specific implementation issues are still unresolved and the final resolution of certain of these issues could impact NEE's and/or FPL's current accounting policies and/or revenue recognition patterns. NEE and FPL currently anticipate adopting the standards update on January 1, 2018 using the modified retrospective method.

Accounting for Partial Sales of Nonfinancial Assets - In February 2017, the FASB issued an accounting standards update regarding the accounting for partial sales of nonfinancial assets. NEE and FPL anticipate adopting the standards update on January 1, 2018, concurrent with the FASB's new revenue recognition standard. The standards update may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as an adjustment to retained earnings as of the date of initial application. NEE and FPL are currently evaluating the effect the adoption of this standards update will have on their consolidated financial statements.

Electric Plant, Depreciation and Amortization - NEER reviews the estimated useful lives of its fixed assets on an ongoing basis. NEER's most recent review indicated that the actual lives of certain equipment at its wind plants are expected to be longer than those previously estimated for depreciation purposes. As a result, effective January 1, 2017, NEER changed the estimated useful lives of certain wind plant equipment from 30 years to 35 years to better reflect the period during which these assets are expected to remain in service. This change increased net income attributable to NEE by approximately $15 million and basic and diluted earnings per share attributable to NEE by approximately $0.03 for the three months ended March 31, 2017. For the year ended December 31, 2017 the change is expected to increase net income attributable to NEE by approximately $60 million.

Assets and Liabilities Associated with Assets Held for Sale - In January 2017, an indirect wholly owned subsidiary of NEE completed the sale of its membership interests in its fiber-optic telecommunications business for net cash proceeds of approximately $1.1 billion, after repayment of $370 million of related long-term debt. In connection with the sale and the related consolidating state income tax effects, a gain of approximately $1.1 billion (approximately $685 million after tax) was recorded in NEE's condensed consolidated statements of income during the three months ended March 31, 2017. The carrying amounts of the major classes of assets and liabilities that were classified as held for sale on NEE's condensed consolidated balance sheets as of December 31, 2016 primarily represent property, plant and equipment and the related long-term debt.