v3.26.1
Expense Example
Jul. 23, 2026
USD ($)
Mercer US Small/Mid Cap Equity Fund | Mercer US Small/Mid Cap Equity Fund | Adviser Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 102
Expense Example, with Redemption, 3 Years 363
Expense Example, with Redemption, 5 Years 645
Expense Example, with Redemption, 10 Years 1,447
Mercer US Small/Mid Cap Equity Fund | Mercer US Small/Mid Cap Equity Fund | Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 77
Expense Example, with Redemption, 3 Years 285
Expense Example, with Redemption, 5 Years 510
Expense Example, with Redemption, 10 Years 1,159
Mercer US Small/Mid Cap Equity Fund | Mercer US Small/Mid Cap Equity Fund | Class Y-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 66
Expense Example, with Redemption, 3 Years 253
Expense Example, with Redemption, 5 Years 456
Expense Example, with Redemption, 10 Years 1,041
Mercer US Small/Mid Cap Equity Fund | Mercer US Small/Mid Cap Equity Fund | Class Y-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 206
Expense Example, with Redemption, 5 Years 374
Expense Example, with Redemption, 10 Years 863
Mercer Non-US Core Equity Fund | Mercer Non-US Core Equity Fund | Adviser Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 89
Expense Example, with Redemption, 3 Years 325
Expense Example, with Redemption, 5 Years 580
Expense Example, with Redemption, 10 Years 1,309
Mercer Non-US Core Equity Fund | Mercer Non-US Core Equity Fund | Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 63
Expense Example, with Redemption, 3 Years 246
Expense Example, with Redemption, 5 Years 444
Expense Example, with Redemption, 10 Years 1,017
Mercer Non-US Core Equity Fund | Mercer Non-US Core Equity Fund | Class Y-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 53
Expense Example, with Redemption, 3 Years 214
Expense Example, with Redemption, 5 Years 390
Expense Example, with Redemption, 10 Years 898
Mercer Non-US Core Equity Fund | Mercer Non-US Core Equity Fund | Class Y-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 38
Expense Example, with Redemption, 3 Years 167
Expense Example, with Redemption, 5 Years 307
Expense Example, with Redemption, 10 Years 717
Mercer Emerging Markets Equity Fund | Mercer Emerging Markets Equity Fund | Adviser Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 90
Expense Example, with Redemption, 3 Years 343
Expense Example, with Redemption, 5 Years 616
Expense Example, with Redemption, 10 Years 1,395
Mercer Emerging Markets Equity Fund | Mercer Emerging Markets Equity Fund | Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 64
Expense Example, with Redemption, 3 Years 264
Expense Example, with Redemption, 5 Years 481
Expense Example, with Redemption, 10 Years 1.105
Mercer Emerging Markets Equity Fund | Mercer Emerging Markets Equity Fund | Class Y-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 54
Expense Example, with Redemption, 3 Years 233
Expense Example, with Redemption, 5 Years 427
Expense Example, with Redemption, 10 Years 987
Mercer Emerging Markets Equity Fund | Mercer Emerging Markets Equity Fund | Class Y-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 39
Expense Example, with Redemption, 3 Years 185
Expense Example, with Redemption, 5 Years 344
Expense Example, with Redemption, 10 Years 807
Mercer Core Fixed Income Fund | Mercer Core Fixed Income Fund | Adviser Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 65
Expense Example, with Redemption, 3 Years 246
Expense Example, with Redemption, 5 Years 442
Expense Example, with Redemption, 10 Years 1,008
Mercer Core Fixed Income Fund | Mercer Core Fixed Income Fund | Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 40
Expense Example, with Redemption, 3 Years 167
Expense Example, with Redemption, 5 Years 305
Expense Example, with Redemption, 10 Years 708
Mercer Core Fixed Income Fund | Mercer Core Fixed Income Fund | Class Y-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 30
Expense Example, with Redemption, 3 Years 135
Expense Example, with Redemption, 5 Years 250
Expense Example, with Redemption, 10 Years 585
Mercer Core Fixed Income Fund | Mercer Core Fixed Income Fund | Class Y-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 14
Expense Example, with Redemption, 3 Years 87
Expense Example, with Redemption, 5 Years 166
Expense Example, with Redemption, 10 Years 400
Mercer Opportunistic Fixed Income Fund | Mercer Opportunistic Fixed Income Fund | Adviser Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 103
Expense Example, with Redemption, 3 Years 360
Expense Example, with Redemption, 5 Years 637
Expense Example, with Redemption, 10 Years 1,427
Mercer Opportunistic Fixed Income Fund | Mercer Opportunistic Fixed Income Fund | Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 78
Expense Example, with Redemption, 3 Years 282
Expense Example, with Redemption, 5 Years 503
Expense Example, with Redemption, 10 Years 1,138
Mercer Opportunistic Fixed Income Fund | Mercer Opportunistic Fixed Income Fund | Class Y-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 67
Expense Example, with Redemption, 3 Years 250
Expense Example, with Redemption, 5 Years 448
Expense Example, with Redemption, 10 Years 1,020
Mercer Opportunistic Fixed Income Fund | Mercer Opportunistic Fixed Income Fund | Class Y-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 52
Expense Example, with Redemption, 3 Years 203
Expense Example, with Redemption, 5 Years 366
Expense Example, with Redemption, 10 Years 842
Mercer Short Duration Fixed Income Fund | Mercer Short Duration Fixed Income Fund | Adviser Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 72
Expense Example, with Redemption, 3 Years 368
Expense Example, with Redemption, 5 Years 686
Expense Example, with Redemption, 10 Years 1,588
Mercer Short Duration Fixed Income Fund | Mercer Short Duration Fixed Income Fund | Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 46
Expense Example, with Redemption, 3 Years 289
Expense Example, with Redemption, 5 Years 552
Expense Example, with Redemption, 10 Years 1,303
Mercer Short Duration Fixed Income Fund | Mercer Short Duration Fixed Income Fund | Class Y-2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 36
Expense Example, with Redemption, 3 Years 258
Expense Example, with Redemption, 5 Years 498
Expense Example, with Redemption, 10 Years 1,187
Mercer Short Duration Fixed Income Fund | Mercer Short Duration Fixed Income Fund | Class Y-3  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 20
Expense Example, with Redemption, 3 Years 210
Expense Example, with Redemption, 5 Years 416
Expense Example, with Redemption, 10 Years $ 1,011