Detached

The adjective detached means someone who is separated or has no emotional interest.

Synonyms are disconnected, isolated, disinterested, or apart.

The word origins from detach meaning “unfasten, disunite” plus -ed. It was first recorded in 1700s.

I detached unnecessary things from my schedule.

It’s not good to always detach yourself from reality.

They have detached him from their political alliance.