Mercer US Small/Mid Cap Equity Fund Mercer Non-US Core Equity Fund Mercer Emerging Markets Equity Fund Mercer Core Fixed Income Fund Mercer Opportunistic Fixed Income Fund Mercer Short Duration Fixed Income Fund Mercer US Small/Mid Cap Equity Fund Mercer Non-US Core Equity Fund Mercer Emerging Markets Equity Fund Mercer Core Fixed Income Fund Mercer Opportunistic Fixed Income Fund Mercer Short Duration Fixed Income Fund Adviser Class Class I Class Y-2 Class Y-3 Adviser Class Class I Class Y-2 Class Y-3 Adviser Class Class I Class Y-2 Class Y-3 Adviser Class Class I Class Y-2 Class Y-3 Adviser Class Class I Class Y-2 Class Y-3 Adviser Class Class I Class Y-2 Class Y-3 C000027786 Member S000010041 Member doc_ Mercer_ Core_ Fixed_ Income_ Fund Member S000041478 Member C000246251 Member doc_ Mercer_ Non US_ Core_ Equity_ Fund Member C000128966 Member C000027788 Member C000246252 Member C000027778 Member doc_ Mercer_ Short_ Duration_ Fixed_ Income_ Fund Member C000106516 Member C000027790 Member C000128968 Member C000027780 Member S000034610 Member C000027785 Member C000128965 Member S000010040 Member C000128967 Member doc_ Mercer_ Emerging_ Markets_ Equity_ Fund Member C000106515 Member C000246249 Member C000027787 Member C000106518 Member C000027777 Member doc_ Mercer_ US_ Small Mid_ Cap_ Equity_ Fund Member C000027792 Member S000082908 Member C000027779 Member C000027789 Member C000106517 Member C000246250 Member C000027791 Member doc_ Mercer_ Opportunistic_ Fixed_ Income_ Fund Member S000010038 Member