The dollar gained on Wednesday as investors focused on the minutes of the Federal Reserve’s last policy meeting to understand the future stages of its monetary policy.
The dollar's index inched up to a one-week peak of 89.904. The greenback continued an overnight rise and climbed 0.45 percent to 107.800 yen.
The euro sank 0.1 percent to $1.2323 following decline of 0.55 percent in the previous session.
The Australian dollar dipped 0.4 percent to $0.7852 and the New Zealand dollar edged down 0.2 percent to $0.7333.
Sterling fell 0.2 percent to $1.3972, its weakest level in more than a week.