The dollar index, which measures the greenback against six major peers, decreased 0.62 percent at 96.6788.
The euro appreciated after the European Central Bank (ECB) increased stimulus to support economies hurt by the COVID-19 pandemic.
The ECB announced on Thursday that it decided to expand its pandemic emergency purchase program by 600 billion euros to a total of 1,350 billion euros.
In late New York trading, the euro increased to 1.1347 U.S. dollars from 1.1237 dollars in the previous session, and the British pound rose to 1.2612 dollars from 1.2587 U.S. dollars in the previous session. The Australian dollar increased to 0.6937 U.S. dollar from 0.6930 dollar.
The U.S. dollar bought 109.12 Japanese yen, higher than 108.93 Japanese yen of the previous session. The U.S. dollar fell to 0.9550 Swiss franc from 0.9619 Swiss franc, and it increased to 1.3505 Canadian dollars from 1.3485 Canadian dollars.
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