By Herbert Lash and Saqib Iqbal Ahmed NEW YORK (Reuters) -The dollar slid broadly against major currencies on Wednesday after the Federal Reserve signaled that future interest rate increases to battle high inflation could be made in smaller increments. The Fed, as expected, raised its key lending rate by 75 basis points for the fourth straight time at the end of its two-day policy meeting on Wednesday. The U.S. central bank acknowledged in a statement the debate around its policy tightening, its impact on the U.S. and world economies, and the danger that more large rate hikes could stress the …