detached

Concise Oxford English Dictionary © 2008 Oxford University Press:
detached/dɪˈtatʃt/

▶adjective

• 1 separate or disconnected.

  ■ (of a house) not joined to another on either side.

• 2 aloof and objective.

• 3 denoting a retina that has become separated from the underlying choroid tissue at the back of the eye, causing loss of vision in the affected area.

– derivatives
detachedly adverb.