NextEra Energy Inc., which was blocked by Hawaii regulators from purchasing Hawaiian Electric Industries Inc. for $4.3 billion this month, announced Friday it will purchase Texas’ largest electrical utility for $18.4 billion.

Juno Beach, Fla.-based NextEra said it is seeking to become a majority owner of Oncor Electric Delivery Co., an electric energy power transmission network in Texas, by purchasing Energy Future Holdings Corp., which owns about 80 percent of Dallas- based Oncor Electric Delivery Co.

If the transaction closes, Oncor will become a principal subsidiary of NextEra — joining Florida Power & Light Co., NextEra’s electrical utility in Florida; and NextEra Energy Resources LLC, NextEra’s utility-scale renewable energy business.

“We are pleased to have reached a definitive agreement to acquire EFH’s 80 percent indirect interest in Oncor,” said Jim Robo, chairman and chief executive of NextEra Energy. “We are incredibly impressed by Oncor’s management team and its employees, and we are committed to retaining the Oncor name, its Dallas headquarters and local management.”

The sale needs approval from the Public Utility Commission of Texas and the Federal Energy Regulatory Commission.

NextEra Energy said it expects the sale to close in the first quarter of 2017. The sale already has been approved by the boards of directors of NextEra Energy and EFH.

In a 2-0 vote July 15, the Hawaii Public Utilities Commission denied NextEra’s purchase of HEI because the agency had doubts regarding Next­Era’s plans for Hawaii.