The greenback pared its modest gains on Friday after the U.S. Senate suspended votes on the tax bill until Friday.
The dollar index was down 0.1 percent at 92.959 .DXY, poised for a weekly rise of 0.2 percent.
The greenback was stable on the day 112.53 yen after hitting 112.690 earlier, its top since Nov. 21, retreating from a 10-week trough of 110.85 yen touched on Monday.
The euro edged up on the day at $1.1912, not far from its two-month high of $1.1961 touched on Monday.
Sterling traded at $1.3535 after a 0.9 percent gain.