010001 - Document - Document And Entity Information {Elements} link:presentationLink link:calculationLink link:definitionLink 040014 - Document - Shareholder Report, Line Graph (Details) LMF6900_Western Asset Variable Global High Yield Bond Portfolio_Class I_TSR SemiAnnual {Class I} link:presentationLink link:calculationLink link:definitionLink 040015 - Document - Shareholder Report, Average Annual Return (Details) LMF6900_Western Asset Variable Global High Yield Bond Portfolio_Class I_TSR SemiAnnual {Class I} link:presentationLink link:calculationLink link:definitionLink 040016 - Document - Shareholder Report, Holdings (Details) LMF6900_Western Asset Variable Global High Yield Bond Portfolio_Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040018 - Document - Shareholder Report, Line Graph (Details) LMF6900_Western Asset Variable Global High Yield Bond Portfolio_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040019 - Document - Shareholder Report, Average Annual Return (Details) LMF6900_Western Asset Variable Global High Yield Bond Portfolio_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040020 - Document - Shareholder Report, Holdings (Details) LMF6900_Western Asset Variable Global High Yield Bond Portfolio_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink