020100 - Document - Risk/Return Summary {Unlabeled} - LARGE CAP FUND - SIIT LARGE CAP FUND link:presentationLink link:definitionLink link:calculationLink 020101 - Disclosure - Risk/Return Detail Data {Elements} - LARGE CAP FUND - SIIT LARGE CAP FUND link:presentationLink link:definitionLink link:calculationLink 020102 - Document - Risk/Return Summary {Unlabeled} - LARGE CAP DISCIPLINED EQUITY FUND - SIIT LARGE CAP DISCIPLINED EQUITY FUND link:presentationLink link:definitionLink link:calculationLink 020103 - Disclosure - Risk/Return Detail Data {Elements} - LARGE CAP DISCIPLINED EQUITY FUND - SIIT LARGE CAP DISCIPLINED EQUITY FUND link:presentationLink link:definitionLink link:calculationLink 020104 - Document - Risk/Return Summary {Unlabeled} - LARGE CAP INDEX FUND - SIIT LARGE CAP INDEX FUND link:presentationLink link:definitionLink link:calculationLink 020105 - Disclosure - Risk/Return Detail Data {Elements} - LARGE CAP INDEX FUND - SIIT LARGE CAP INDEX FUND link:presentationLink link:definitionLink link:calculationLink 020106 - Document - Risk/Return Summary {Unlabeled} - S&P 500 INDEX FUND - SIIT S&P 500 Index Fund link:presentationLink link:definitionLink link:calculationLink 020107 - Disclosure - Risk/Return Detail Data {Elements} - S&P 500 INDEX FUND - SIIT S&P 500 Index Fund link:presentationLink link:definitionLink link:calculationLink 020108 - Document - Risk/Return Summary {Unlabeled} - EXTENDED MARKET INDEX FUND - SIIT Extended Market Index Fund link:presentationLink link:definitionLink link:calculationLink 020109 - Disclosure - Risk/Return Detail Data {Elements} - EXTENDED MARKET INDEX FUND - SIIT Extended Market Index Fund link:presentationLink link:definitionLink link:calculationLink 020110 - Document - Risk/Return Summary {Unlabeled} - SMALL CAP FUND - SIIT SMALL CAP FUND link:presentationLink link:definitionLink link:calculationLink 020111 - Disclosure - Risk/Return Detail Data {Elements} - SMALL CAP FUND - SIIT SMALL CAP FUND link:presentationLink link:definitionLink link:calculationLink 020112 - Document - Risk/Return Summary {Unlabeled} - SMALL CAP II FUND - SIIT Small Cap II Fund link:presentationLink link:definitionLink link:calculationLink 020113 - Disclosure - Risk/Return Detail Data {Elements} - SMALL CAP II FUND - SIIT Small Cap II Fund link:presentationLink link:definitionLink link:calculationLink 020114 - Document - Risk/Return Summary {Unlabeled} - SMALL/MID CAP EQUITY FUND - SIIT SMALL MID CAP EQUITY FUND link:presentationLink link:definitionLink link:calculationLink 020115 - Disclosure - Risk/Return Detail Data {Elements} - SMALL/MID CAP EQUITY FUND - SIIT SMALL MID CAP EQUITY FUND link:presentationLink link:definitionLink link:calculationLink 020116 - Document - Risk/Return Summary {Unlabeled} - U.S. EQUITY FACTOR ALLOCATION FUND - SIIT U.S. Equity Factor Allocation Fund link:presentationLink link:definitionLink link:calculationLink 020117 - Disclosure - Risk/Return Detail Data {Elements} - U.S. EQUITY FACTOR ALLOCATION FUND - SIIT U.S. Equity Factor Allocation Fund link:presentationLink link:definitionLink link:calculationLink 020118 - Document - Risk/Return Summary {Unlabeled} - U.S. MANAGED VOLATILITY FUND - SIIT U.S. Managed Volatility Fund link:presentationLink link:definitionLink link:calculationLink 020119 - Disclosure - Risk/Return Detail Data {Elements} - U.S. MANAGED VOLATILITY FUND - SIIT U.S. Managed Volatility Fund link:presentationLink link:definitionLink link:calculationLink 020120 - Document - Risk/Return Summary {Unlabeled} - GLOBAL MANAGED VOLATILITY FUND - SIIT Global Managed Volatility Fund link:presentationLink link:definitionLink link:calculationLink 020121 - Disclosure - Risk/Return Detail Data {Elements} - GLOBAL MANAGED VOLATILITY FUND - SIIT Global Managed Volatility Fund link:presentationLink link:definitionLink link:calculationLink 020122 - Document - Risk/Return Summary {Unlabeled} - WORLD EQUITY EX-US FUND - SIIT WORLD EQUITY EX-US FUND link:presentationLink link:definitionLink link:calculationLink 020123 - Disclosure - Risk/Return Detail Data {Elements} - WORLD EQUITY EX-US FUND - SIIT WORLD EQUITY EX-US FUND link:presentationLink link:definitionLink link:calculationLink 020124 - Document - Risk/Return Summary {Unlabeled} - SCREENED WORLD EQUITY EX-US FUND - SIIT Screened World Equity Ex-US Fund link:presentationLink link:definitionLink link:calculationLink 020125 - Disclosure - Risk/Return Detail Data {Elements} - SCREENED WORLD EQUITY EX-US FUND - SIIT Screened World Equity Ex-US Fund link:presentationLink link:definitionLink link:calculationLink 020126 - Document - Risk/Return Summary {Unlabeled} - EMERGING MARKETS EQUITY FUND - SIIT EMERGING MARKETS EQUITY FUND link:presentationLink link:definitionLink link:calculationLink 020127 - Disclosure - Risk/Return Detail Data {Elements} - EMERGING MARKETS EQUITY FUND - SIIT EMERGING MARKETS EQUITY FUND link:presentationLink link:definitionLink link:calculationLink 020128 - Document - Risk/Return Summary {Unlabeled} - OPPORTUNISTIC INCOME FUND - SIIT Opportunistic Income Fund link:presentationLink link:definitionLink link:calculationLink 020129 - Disclosure - Risk/Return Detail Data {Elements} - OPPORTUNISTIC INCOME FUND - SIIT Opportunistic Income Fund link:presentationLink link:definitionLink link:calculationLink 020130 - Document - Risk/Return Summary {Unlabeled} - CORE FIXED INCOME FUND - SIIT CORE FIXED INCOME link:presentationLink link:definitionLink link:calculationLink 020131 - Disclosure - Risk/Return Detail Data {Elements} - CORE FIXED INCOME FUND - SIIT CORE FIXED INCOME link:presentationLink link:definitionLink link:calculationLink 020132 - Document - Risk/Return Summary {Unlabeled} - HIGH YIELD BOND FUND - SIIT HIGH YIELD BOND FUND link:presentationLink link:definitionLink link:calculationLink 020133 - Disclosure - Risk/Return Detail Data {Elements} - HIGH YIELD BOND FUND - SIIT HIGH YIELD BOND FUND link:presentationLink link:definitionLink link:calculationLink 020134 - Document - Risk/Return Summary {Unlabeled} - LONG DURATION FUND - SIIT LONG DURATION FUND link:presentationLink link:definitionLink link:calculationLink 020135 - Disclosure - Risk/Return Detail Data {Elements} - LONG DURATION FUND - SIIT LONG DURATION FUND link:presentationLink link:definitionLink link:calculationLink 020136 - Document - Risk/Return Summary {Unlabeled} - LONG DURATION CREDIT FUND - SIIT Long Duration Credit Fund link:presentationLink link:definitionLink link:calculationLink 020137 - Disclosure - Risk/Return Detail Data {Elements} - LONG DURATION CREDIT FUND - SIIT Long Duration Credit Fund link:presentationLink link:definitionLink link:calculationLink 020138 - Document - Risk/Return Summary {Unlabeled} - ULTRA SHORT DURATION BOND FUND - SIIT Ultra Short Duration Bond Fund link:presentationLink link:definitionLink link:calculationLink 020139 - Disclosure - Risk/Return Detail Data {Elements} - ULTRA SHORT DURATION BOND FUND - SIIT Ultra Short Duration Bond Fund link:presentationLink link:definitionLink link:calculationLink 020140 - Document - Risk/Return Summary {Unlabeled} - EMERGING MARKETS DEBT FUND - SIIT EMERGING MARKETS DEBT FUND link:presentationLink link:definitionLink link:calculationLink 020141 - Disclosure - Risk/Return Detail Data {Elements} - EMERGING MARKETS DEBT FUND - SIIT EMERGING MARKETS DEBT FUND link:presentationLink link:definitionLink link:calculationLink 020142 - Document - Risk/Return Summary {Unlabeled} - REAL RETURN FUND - SIIT Real Return Fund link:presentationLink link:definitionLink link:calculationLink 020143 - Disclosure - Risk/Return Detail Data {Elements} - REAL RETURN FUND - SIIT Real Return Fund link:presentationLink link:definitionLink link:calculationLink 020144 - Document - Risk/Return Summary {Unlabeled} - LIMITED DURATION BOND FUND - SIIT Limited Duration Bond Fund link:presentationLink link:definitionLink link:calculationLink 020145 - Disclosure - Risk/Return Detail Data {Elements} - LIMITED DURATION BOND FUND - SIIT Limited Duration Bond Fund link:presentationLink link:definitionLink link:calculationLink 020146 - Document - Risk/Return Summary {Unlabeled} - INTERMEDIATE DURATION CREDIT FUND - SIIT Intermediate Duration Credit Fund link:presentationLink link:definitionLink link:calculationLink 020147 - Disclosure - Risk/Return Detail Data {Elements} - INTERMEDIATE DURATION CREDIT FUND - SIIT Intermediate Duration Credit Fund link:presentationLink link:definitionLink link:calculationLink 020148 - Document - Risk/Return Summary {Unlabeled} - DYNAMIC ASSET ALLOCATION FUND - SIIT Dynamic Asset Allocation Fund link:presentationLink link:definitionLink link:calculationLink 020149 - Disclosure - Risk/Return Detail Data {Elements} - DYNAMIC ASSET ALLOCATION FUND - SIIT Dynamic Asset Allocation Fund link:presentationLink link:definitionLink link:calculationLink 020150 - Document - Risk/Return Summary {Unlabeled} - MULTI-ASSET REAL RETURN FUND - SIIT Multi-Asset Real Return Fund link:presentationLink link:definitionLink link:calculationLink 020151 - Disclosure - Risk/Return Detail Data {Elements} - MULTI-ASSET REAL RETURN FUND - SIIT Multi-Asset Real Return Fund link:presentationLink link:definitionLink link:calculationLink