How much money has the U.S. donated to refugees (up to 2015)?

As of 2015, the United States had donated over $4 billion to support refugees globally. This funding primarily provided humanitarian aid, assistance, and resettlement services through various programs and agencies, including the U.S. Department of State and the U.S. Agency for International Development (USAID). The U.S. has consistently been one of the largest contributors to international refugee assistance efforts.