Revenue Recognition	3 Months Ended
Mar. 31, 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 is, at FPL, for the delivery of electricity 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 March 31, 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 months ended March 31, 2018, NEE’s revenue from contracts with customers was approximately $3.3 billion ($2.6 billion at FPL). At March 31, 2018, NEE's accounts receivable balances related to contracts with customers was approximately $1.3 billion ($951 million at FPL) which are primarily included in customer receivables on NEE's and FPL's condensed consolidated balance sheets. FPL - FPL’s revenue from contracts with customers is 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 over 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. FPL considers the billed and unbilled amounts to 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. NEER considers the amount billed to 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.

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 is, at FPL, for the delivery of electricity 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 March 31, 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 months ended March 31, 2018, NEE’s revenue from contracts with customers was approximately $3.3 billion ($2.6 billion at FPL). At March 31, 2018, NEE's accounts receivable balances related to contracts with customers was approximately $1.3 billion ($951 million at FPL) which are primarily included in customer receivables on NEE's and FPL's condensed consolidated balance sheets.

FPL - FPL’s revenue from contracts with customers is 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 over 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. FPL considers the billed and unbilled amounts to 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. NEER considers the amount billed to 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.