U.S. one-hundred dollar banknotes are arranged for a photograph in Hong Kong on April 15, 2019.

The dollar fell on Wednesday after the Federal Reserve left interest rates unchanged and repeated a vow to do what it takes to shore up the economy that has been battered by business shutdowns due to the novel coronavirus.

"The Federal Reserve is committed to using its full range of tools to support the U.S. economy in this challenging time, thereby promoting its maximum employment and price stability goals," the central bank said in a statement at the end of a two-day policy meeting.