020100 - Document - Risk/Return Summary {Unlabeled} - Old Westbury All Cap Core Fund - Old Westbury All Cap Core Fund link:presentationLink link:definitionLink link:calculationLink 020101 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury All Cap Core Fund - Old Westbury All Cap Core Fund link:presentationLink link:definitionLink link:calculationLink 020102 - Document - Risk/Return Summary {Unlabeled} - Old Westbury Large Cap Strategies Fund - Old Westbury Large Cap Strategies Fund link:presentationLink link:definitionLink link:calculationLink 020103 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury Large Cap Strategies Fund - Old Westbury Large Cap Strategies Fund link:presentationLink link:definitionLink link:calculationLink 020104 - Document - Risk/Return Summary {Unlabeled} - Old Westbury Small & Mid Cap Strategies Fund - Old Westbury Small & Mid Cap Strategies Fund link:presentationLink link:definitionLink link:calculationLink 020105 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury Small & Mid Cap Strategies Fund - Old Westbury Small & Mid Cap Strategies Fund link:presentationLink link:definitionLink link:calculationLink 020106 - Document - Risk/Return Summary {Unlabeled} - Old Westbury Total Equity Fund - Old Westbury Total Equity Fund link:presentationLink link:definitionLink link:calculationLink 020107 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury Total Equity Fund - Old Westbury Total Equity Fund link:presentationLink link:definitionLink link:calculationLink 020108 - Document - Risk/Return Summary {Unlabeled} - Old Westbury Credit Income Fund - Old Westbury Credit Income Fund link:presentationLink link:definitionLink link:calculationLink 020109 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury Credit Income Fund - Old Westbury Credit Income Fund link:presentationLink link:definitionLink link:calculationLink 020110 - Document - Risk/Return Summary {Unlabeled} - Old Westbury Fixed Income Fund - Old Westbury Fixed Income Fund link:presentationLink link:definitionLink link:calculationLink 020111 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury Fixed Income Fund - Old Westbury Fixed Income Fund link:presentationLink link:definitionLink link:calculationLink 020112 - Document - Risk/Return Summary {Unlabeled} - Old Westbury Short-Term Bond Fund - Old Westbury Short-Term Bond Fund link:presentationLink link:definitionLink link:calculationLink 020113 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury Short-Term Bond Fund - Old Westbury Short-Term Bond Fund link:presentationLink link:definitionLink link:calculationLink 020114 - Document - Risk/Return Summary {Unlabeled} - Old Westbury Municipal Bond Fund - Old Westbury Municipal Bond Fund link:presentationLink link:definitionLink link:calculationLink 020115 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury Municipal Bond Fund - Old Westbury Municipal Bond Fund link:presentationLink link:definitionLink link:calculationLink 020116 - Document - Risk/Return Summary {Unlabeled} - Old Westbury California Municipal Bond Fund - Old Westbury California Municipal Bond Fund link:presentationLink link:definitionLink link:calculationLink 020117 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury California Municipal Bond Fund - Old Westbury California Municipal Bond Fund link:presentationLink link:definitionLink link:calculationLink 020118 - Document - Risk/Return Summary {Unlabeled} - Old Westbury New York Municipal Bond Fund - Old Westbury New York Municipal Bond Fund link:presentationLink link:definitionLink link:calculationLink 020119 - Disclosure - Risk/Return Detail Data {Elements} - Old Westbury New York Municipal Bond Fund - Old Westbury New York Municipal Bond Fund link:presentationLink link:definitionLink link:calculationLink