Which countries have US dollar swap lines?

Can you enlighten me on which nations have established US dollar swap lines? I'm curious to understand the financial arrangements these countries have made to facilitate the exchange of dollars during times of need or to stabilize their currencies. It would be interesting to learn about the motivations behind these agreements and the potential benefits they offer to both parties involved. Could you elaborate on the process of setting up such lines and the role the Federal Reserve plays in facilitating these arrangements?