This morning, Apple announced its largest spend commitment to date: A whopping $500 billion thats set to be invested in American manufacturing, engineering, and AI efforts over the next four years.The major news comes just days after Apple CEO Tim Cook met with President Donald Trump to discuss the tech giants current manufacturing practices and the presidents tariff initiatives. Earlier this month, the Trump administration moved ahead with a 10% tariff on all Chinese imports and proposed even larger tariffs on Mexican importsboth countries that serve as major manufacturing suppliers for Apples partner, Foxconn Technology Group. After Cook and Trump met on Friday, the president said that Apple planned to close existing plants in Mexico and build more products in the U.S. instead, claiming, They dont want to be in the tariffs.[Cook] is going to start building, Trump told reporters of the CEOs plans for U.S. investment. Very big numbersyou have to speak to him. I assume theyre going to announce it at some point.Now, Cooks plans have come into sharper focus. Heres everything you need to know about Apples supersized American investment:Where will the money go?According to a press release from Apple, the $500 billion investment will be spread across a few major projects and several smaller initiatives.To start, the company plans to begin building servers in the U.S. via a new 250,000-square-foot manufacturing facility. The plant will be located in Houston, Texas, and is slated to open sometime in 2026. Meanwhile, in Detroit, Apple will open the Apple Manufacturing Academy, a tech education initiative.Apple engineers, along with experts from top universities such as Michigan State, will consult with small- and medium-sized businesses on implementing AI and smart manufacturing techniques, the press release notes.The company will also use the new investment to double its existing U.S. Advanced Manufacturing Fund, a program designed to create American manufacturing jobs. Part of that expansion will entail a multibillion-dollar commitment from Apple to produce advanced silicon in TSMCs Fab 21 facility in Arizona, the release reads.What can Apple users expect?Another core beneficiary of the $500 billion initiative will be Apples U.S.-based research and development (R&D) teams, which are responsible for new product releases like the recent iPhone 16E.Over the next four years, Apple expects to hire around 20,000 new employees, the vast majority of whom will be focused on R&D, silicon engineering, software development, AI, and machine learningeach a subcategory that will presumably shape Apples future product releases.Why is Apple doing this now?As Trump continues to pursue higher tariffs, costs for overseas manufacturing are rising for Apple, especially given that China is the companys largest manufacturing hub. Meanwhile, Cooklike many tech CEOs in Trumps second administrationseems intent on maintaining a strong relationship with the president, including via donations to his campaign and visits to his Mar-A-Lago estate. During Trumps first term, Cook leveraged his connection to the president to secure a tariff exemption for the iPhone.Now, it seems, this unprecedented new investment is part of Cooks plan to shepherd Apple forward in a political climate that rewards American manufacturing while punishing production abroad.