WASHINGTON — President Trump is planning to introduce an initiative on Thursday that will seek to help bring economic security to 50 million women across the world by 2025, a program that his eldest daughter, Ivanka Trump, has hailed as a nonpartisan and “generous” approach to women’s empowerment.

The plan, which the White House is calling the Women’s Global Development and Prosperity Initiative, will draw from a $50 million starter fund from the United States Agency for International Development, and will team up with several private companies, including UPS and Walmart, Ms. Trump said. The White House is expected to officially announce the initiative on Thursday afternoon.

The Trump administration has often been guided by an isolationist credo espoused by the president and his advisers: Last year, an administration plan to cut U.S.A.I.D.’s foreign aid budget was met with a bipartisan backlash.

Ms. Trump’s initiative was meant to strike a subtly different tone.

“‘America First’ does not mean ‘America Alone,’” Ms. Trump, a senior adviser to the president and a champion of the initiative, said in a call with reporters on Wednesday as she detailed the rollout. “We are proud to be the most generous nation in the world.”