Shareholder Fees	Mar. 31, 2026
Mercer US Small/Mid Cap Equity Fund \| Mercer US Small/Mid Cap Equity Fund \| Adviser Class
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer US Small/Mid Cap Equity Fund \| Mercer US Small/Mid Cap Equity Fund \| Class I
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer US Small/Mid Cap Equity Fund \| Mercer US Small/Mid Cap Equity Fund \| Class Y-2
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer US Small/Mid Cap Equity Fund \| Mercer US Small/Mid Cap Equity Fund \| Class Y-3
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Non-US Core Equity Fund \| Mercer Non-US Core Equity Fund \| Adviser Class
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Non-US Core Equity Fund \| Mercer Non-US Core Equity Fund \| Class I
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Non-US Core Equity Fund \| Mercer Non-US Core Equity Fund \| Class Y-2
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Non-US Core Equity Fund \| Mercer Non-US Core Equity Fund \| Class Y-3
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Emerging Markets Equity Fund \| Mercer Emerging Markets Equity Fund \| Adviser Class
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Emerging Markets Equity Fund \| Mercer Emerging Markets Equity Fund \| Class I
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Emerging Markets Equity Fund \| Mercer Emerging Markets Equity Fund \| Class Y-2
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Emerging Markets Equity Fund \| Mercer Emerging Markets Equity Fund \| Class Y-3
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Core Fixed Income Fund \| Mercer Core Fixed Income Fund \| Adviser Class
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Core Fixed Income Fund \| Mercer Core Fixed Income Fund \| Class I
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Core Fixed Income Fund \| Mercer Core Fixed Income Fund \| Class Y-2
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Core Fixed Income Fund \| Mercer Core Fixed Income Fund \| Class Y-3
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Opportunistic Fixed Income Fund \| Mercer Opportunistic Fixed Income Fund \| Adviser Class
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Opportunistic Fixed Income Fund \| Mercer Opportunistic Fixed Income Fund \| Class I
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Opportunistic Fixed Income Fund \| Mercer Opportunistic Fixed Income Fund \| Class Y-2
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Opportunistic Fixed Income Fund \| Mercer Opportunistic Fixed Income Fund \| Class Y-3
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Short Duration Fixed Income Fund \| Mercer Short Duration Fixed Income Fund \| Adviser Class
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Short Duration Fixed Income Fund \| Mercer Short Duration Fixed Income Fund \| Class I
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Short Duration Fixed Income Fund \| Mercer Short Duration Fixed Income Fund \| Class Y-2
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Mercer Short Duration Fixed Income Fund \| Mercer Short Duration Fixed Income Fund \| Class Y-3
Prospectus [Line Items]
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)

Mercer US Small/Mid Cap Equity Fund | Mercer US Small/Mid Cap Equity Fund | Adviser Class