Synonyms for Detachment (same or very similar meaning)
WordNet sense 1 (the state of being isolated or detached):
insularity, insulation, insularismWordNet sense 2 (avoiding emotional involvement):
withdrawalWordNet sense 3 (coming apart):
breakup, separationWordNet sense 4 (the act of releasing from an attachment or connection):
disengagementFrom the ODE community, based on WordNetadd/edit