detachment

noun

• The action of detaching; separation.
• The state of being detached or disconnected; insulation.
• Indifference to the concerns of others; disregard; nonchalance; aloofness.
• Absence of bias; impartiality; objectivity.
• The separation of a military unit from the main body for a particular purpose or special mission.
• The unit so dispatched.
• A permanent unit organized for special duties.
• Any smaller portion of a main body separately employed.