Dominion Energy plans to merge with Florida-based NextEra Energy to create the world's largest electricity company, the companies announced Monday. Why it matters: The deal could have a big impact on Richmonders' power bills and possibly on Dominion's more than 5,000 local workers. The big picture: The all-stock merger between the two energy giants lands amid soaring electricity demand, driven largely by AI and the data centers that power it. It would also give NextEra, which owns the utility Florida Power & Light, a foothold in Virginia, the data center capital of the world, where electricity sales are growing at twice the national rate, per a NextEra investor presentation.The companies said in a joint announcement that their prospective 10 million combined customers would benefit from increased scale and efficiency from the mega company. The combined company would operate as NextEra Energy on the stock exchange but still be called Dominion Energy in Virginia.And the merged mega power company would also have dual headquarters, with one in Richmond and one in Juno Beach, Florida. The deal has to be approved by state and federal regulators. The intrigue: As part of the merger, NextEra is proposing $2.25 billion in electric bill credits, spread over two years, for Dominion customers — with 79% of that going to Dominion's Virginia customers, per a NextEra investor presentation. That breaks down to about $1.78 billion for Dominion's roughly 2.7 million Virginia customers, or about a $27-a-month bill credit that locals could see for 24 months if the deal is approved. Yes, but: Those amounts are proposals. "The final amount and monthly bill impact will be decided by state regulatory commissions," Dominion spokesperson Aaron Ruby tells Axios.Context: Dominion customers' bills rose by an average of $11.24 at the start of the year and are expected to rise again this year by nearly $3 before another hike hits in January. Meanwhile, NextEra's Florida customers are paying for what critics have dubbed "the largest rate hike in American history" — $7 billion more over four years. Plus, as a combined company, NextEra told investors, it would increase charitable giving by $10 million a year for five years in Virginia, South Carolina and North Carolina, where Dominion serves about 4 million customers.Dominion is a major sponsor for local events and venues, including last weekend's Dominion Riverrock, the Dominion Energy Christmas Parade and the Dominion Energy Center. It invested $46.3 million in local communities in 2024, per the company. Zoom in: Dominion has about 15,000 employees, including 5,433 in Richmond, making it the region's fifth largest private employer, per the region's economic development group. After the deal closes, Dominion's workers will have 18 months of job protection and two years of compensation and benefits guaranteed, per NextEra's investor presentation.After that, it's unclear what will happen to those local workers and jobs. What they're saying: "The combined company will have an enormous amount of work ahead of it. We expect there to be good jobs for our talented teams across all the states we serve and wherever we have operations across the country," Dominion's Ruby tells Axios. What we're watching: The deal could face legal and regulatory challenges during the approval process. The companies hope to close the transaction in 12 to 18 months. Axios' Ben Geman contributed to this report.