GMO Emerging Markets Debt Total Return Fund S000103783 [Member] Class III C000274378 [Member] Class IV C000274381 [Member] Class V C000274380 [Member] Class VI C000274379 [Member] Class R6 C000274377 [Member] Class I C000274376 [Member] Credit Risk [Member] Currency Risk [Member] Market Risk Fixed Income [Member] Market Disruption and Geopolitical Risk [Member] Focused Investment Risk [Member] Illiquidity Risk [Member] Derivatives and Short Sales Risk [Member] Counterparty Risk [Member] Non-U.S. Investment Risk [Member] Large Transactions Risk [Member] Management and Operational Risk [Member] Leveraging Risk [Member]