Revenue Recognition	9 Months Ended
Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue from Contracts with Customers Effective January 1, 2018, NEE and FPL adopted an accounting standards update that provides guidance on the recognition of revenue from contracts with customers and requires additional disclosures regarding such contracts (new revenue standard). Under the new revenue standard, revenue is recognized when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. The promised goods or services in the majority of NEE’s contracts with customers under the new revenue standard is, at FPL, for the delivery of electricity based on tariff rates approved by the FPSC and, at NEER, for the delivery of energy commodities and the availability of electric capacity and electric transmission. NEE and FPL adopted the new revenue standard using the modified retrospective approach applying it only to contracts that were not complete at January 1, 2018. On January 1, 2018, NEE recorded a reduction to retained earnings of approximately $25 million representing the cumulative effect of adopting the new revenue standard, which was primarily due to identifying separate performance obligations in certain energy-related contracts at NEER. The cumulative effect of adopting the new revenue standard was not material at FPL. The impact of applying the new revenue standard to NEE’s and FPL's September 30, 2018 financial statements as compared to the prior revenue standard was not material. FPL and NEER generate substantially all of NEE’s operating revenues, which primarily include revenues from contracts with customers, as well as, at NEER, derivative and lease transactions. For the vast majority of contracts with customers, NEE believes that the obligation to deliver energy, capacity or transmission is satisfied over time as the customer simultaneously receives and consumes benefits as NEE performs. For the three and nine months ended September 30, 2018, NEE’s revenue from contracts with customers was approximately $4.1 billion ($3.4 billion at FPL) and $10.9 billion ($8.9 billion at FPL), respectively. NEE's and FPL's receivables are primarily associated with revenues earned from contracts with customers, as well as, at NEER, derivative and lease transactions, and consist of both billed and unbilled amounts, which are recorded in customer receivables and other receivables on NEE's and FPL's condensed consolidated balance sheets. Receivables represent unconditional rights to consideration and reflect the differences in timing of revenue recognition and cash collections. For substantially all of NEE's and FPL's receivables, regardless of the type of revenue transaction from which the receivable originated, customer and counterparty credit risk is managed in the same manner and the terms and conditions of payment are similar. FPL - FPL’s revenues are derived primarily from tariff-based sales that result from providing electricity to retail customers in Florida with no defined contractual term. Electricity sales to retail customers account for approximately 90% of FPL’s operating revenues, the majority of which is to residential customers. FPL’s retail customers receive a bill monthly based on the amount of monthly kWh usage with payment due monthly. For these types of sales, FPL recognizes revenue as electricity is delivered and billed to customers, as well as an estimate for electricity delivered and not yet billed. The billed and unbilled amounts represent the value of electricity delivered to the customer. NEER - NEER’s revenue from contracts with customers is derived primarily from the sale of energy commodities, electric capacity and electric transmission. For these types of sales, NEER recognizes revenue as energy commodities are delivered and as electric capacity and electric transmission are made available, consistent with the amounts billed to customers based on rates stipulated in the respective contracts as well as an accrual for amounts earned but not yet billed. The amounts billed and accrued represent the value of energy or transmission delivered and/or the capacity of energy or transmission available to the customer. Revenues yet to be earned under these contracts, which have maturity dates ranging from 2018 to 2043, will vary based on the volume of energy or transmission delivered and/or available. NEER’s customers typically receive bills monthly with payment due within 30 days. Certain contracts with customers contain a fixed price related primarily to electric capacity sales associated with ISO annual auctions through 2020 and certain power purchase agreements with maturity dates through 2034. At September 30, 2018, NEER expects to record approximately $650 million of revenues related to the fixed price components of such contracts over the remaining terms of the related contracts as the capacity is provided.

Revenue from Contracts with Customers

Effective January 1, 2018, NEE and FPL adopted an accounting standards update that provides guidance on the recognition of revenue from contracts with customers and requires additional disclosures regarding such contracts (new revenue standard). Under the new revenue standard, revenue is recognized when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. The promised goods or services in the majority of NEE’s contracts with customers under the new revenue standard is, at FPL, for the delivery of electricity based on tariff rates approved by the FPSC and, at NEER, for the delivery of energy commodities and the availability of electric capacity and electric transmission. NEE and FPL adopted the new revenue standard using the modified retrospective approach applying it only to contracts that were not complete at January 1, 2018. On January 1, 2018, NEE recorded a reduction to retained earnings of approximately $25 million representing the cumulative effect of adopting the new revenue standard, which was primarily due to identifying separate performance obligations in certain energy-related contracts at NEER. The cumulative effect of adopting the new revenue standard was not material at FPL. The impact of applying the new revenue standard to NEE’s and FPL's September 30, 2018 financial statements as compared to the prior revenue standard was not material.

FPL and NEER generate substantially all of NEE’s operating revenues, which primarily include revenues from contracts with customers, as well as, at NEER, derivative and lease transactions. For the vast majority of contracts with customers, NEE believes that the obligation to deliver energy, capacity or transmission is satisfied over time as the customer simultaneously receives and consumes benefits as NEE performs. For the three and nine months ended September 30, 2018, NEE’s revenue from contracts with customers was approximately $4.1 billion ($3.4 billion at FPL) and $10.9 billion ($8.9 billion at FPL), respectively. NEE's and FPL's receivables are primarily associated with revenues earned from contracts with customers, as well as, at NEER, derivative and lease transactions, and consist of both billed and unbilled amounts, which are recorded in customer receivables and other receivables on NEE's and FPL's condensed consolidated balance sheets. Receivables represent unconditional rights to consideration and reflect the differences in timing of revenue recognition and cash collections. For substantially all of NEE's and FPL's receivables, regardless of the type of revenue transaction from which the receivable originated, customer and counterparty credit risk is managed in the same manner and the terms and conditions of payment are similar.

FPL - FPL’s revenues are derived primarily from tariff-based sales that result from providing electricity to retail customers in Florida with no defined contractual term. Electricity sales to retail customers account for approximately 90% of FPL’s operating revenues, the majority of which is to residential customers. FPL’s retail customers receive a bill monthly based on the amount of monthly kWh usage with payment due monthly. For these types of sales, FPL recognizes revenue as electricity is delivered and billed to customers, as well as an estimate for electricity delivered and not yet billed. The billed and unbilled amounts represent the value of electricity delivered to the customer.

NEER - NEER’s revenue from contracts with customers is derived primarily from the sale of energy commodities, electric capacity and electric transmission. For these types of sales, NEER recognizes revenue as energy commodities are delivered and as electric capacity and electric transmission are made available, consistent with the amounts billed to customers based on rates stipulated in the respective contracts as well as an accrual for amounts earned but not yet billed. The amounts billed and accrued represent the value of energy or transmission delivered and/or the capacity of energy or transmission available to the customer. Revenues yet to be earned under these contracts, which have maturity dates ranging from 2018 to 2043, will vary based on the volume of energy or transmission delivered and/or available. NEER’s customers typically receive bills monthly with payment due within 30 days. Certain contracts with customers contain a fixed price related primarily to electric capacity sales associated with ISO annual auctions through 2020 and certain power purchase agreements with maturity dates through 2034. At September 30, 2018, NEER expects to record approximately $650 million of revenues related to the fixed price components of such contracts over the remaining terms of the related contracts as the capacity is provided.