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Investment Objectives and Goals
Mar. 01, 2026
California Municipal Fund  
Prospectus [Line Items]  
Risk/Return [Heading] CALIFORNIA MUNICIPAL FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide as high a level of current income that is exempt from federal and state personal income tax as is consistent with prudent investment management and preservation of capital.
Core Fixed Income Fund  
Prospectus [Line Items]  
Risk/Return [Heading] CORE FIXED INCOME FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide a high level of current income consistent with preservation of capital.
Core Plus Bond Fund  
Prospectus [Line Items]  
Risk/Return [Heading] CORE PLUS BOND FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide current income
Objective, Secondary [Text Block] and, as a secondary objective, capital appreciation.
Diversified Income Fund  
Prospectus [Line Items]  
Risk/Return [Heading] DIVERSIFIED INCOME FUND
Objective [Heading] Objective
Objective, Primary [Text Block]
The Fund seeks income.
Diversified International Fund  
Prospectus [Line Items]  
Risk/Return [Heading] DIVERSIFIED INTERNATIONAL FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
Equity Income Fund  
Prospectus [Line Items]  
Risk/Return [Heading] EQUITY INCOME FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide current income and long-term growth of income and capital.
Finisterre Emerging Markets Total Return Bond Fund  
Prospectus [Line Items]  
Risk/Return [Heading] FINISTERRE EMERGING MARKETS TOTAL RETURN BOND FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to generate total returns from current income and capital appreciation.
Global Emerging Markets Fund  
Prospectus [Line Items]  
Risk/Return [Heading] GLOBAL EMERGING MARKETS FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
Global Real Estate Securities Fund  
Prospectus [Line Items]  
Risk/Return [Heading] GLOBAL REAL ESTATE SECURITIES FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to generate a total return.
Government & High Quality Bond Fund  
Prospectus [Line Items]  
Risk/Return [Heading] GOVERNMENT & HIGH QUALITY BOND FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide a high level of current income consistent with safety and liquidity.
Government Money Market Fund  
Prospectus [Line Items]  
Risk/Return [Heading] GOVERNMENT MONEY MARKET FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks as high a level of current income as is considered consistent with preservation of principal and maintenance of liquidity.
High Yield Fund  
Prospectus [Line Items]  
Risk/Return [Heading] HIGH YIELD FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide a high level of current income.
Inflation Protection Fund  
Prospectus [Line Items]  
Risk/Return [Heading] INFLATION PROTECTION FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide current income and real (after inflation) total returns.
International Bond Fund  
Prospectus [Line Items]  
Risk/Return [Heading] INTERNATIONAL BOND FUND
Objective [Heading] Objective
Objective, Primary [Text Block]
The Fund seeks to provide current income and capital appreciation.
International Equity Fund  
Prospectus [Line Items]  
Risk/Return [Heading] INTERNATIONAL EQUITY FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
LargeCap Growth Fund I  
Prospectus [Line Items]  
Risk/Return [Heading] LARGECAP GROWTH FUND I
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
LargeCap S&P 500 Index Fund  
Prospectus [Line Items]  
Risk/Return [Heading] LARGECAP S&P 500 INDEX FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
LargeCap Value Fund III  
Prospectus [Line Items]  
Risk/Return [Heading] LARGECAP VALUE FUND III
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
MidCap Fund  
Prospectus [Line Items]  
Risk/Return [Heading] MIDCAP FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
MidCap S&P 400 Index Fund  
Prospectus [Line Items]  
Risk/Return [Heading] MIDCAP S&P 400 INDEX FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
MidCap Value Fund I  
Prospectus [Line Items]  
Risk/Return [Heading] MIDCAP VALUE FUND I
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
Money Market Fund  
Prospectus [Line Items]  
Risk/Return [Heading] MONEY MARKET FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks as high a level of current income as is considered consistent with preservation of principal and maintenance of liquidity.
Overseas Fund  
Prospectus [Line Items]  
Risk/Return [Heading] OVERSEAS FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
Principal Capital Appreciation Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL CAPITAL APPRECIATION FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide long-term growth of capital.
Principal LifeTime Strategic Income Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME STRATEGIC INCOME FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks current income, and
Objective, Secondary [Text Block] as a secondary objective, capital appreciation.
Principal LifeTime 2015 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2015 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2020 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2020 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2025 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2025 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2030 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2030 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2035 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2035 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2040 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2040 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2045 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2045 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2050 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2050 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2055 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2055 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2060 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2060 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2065 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2065 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime 2070 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME 2070 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid Income Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID INCOME FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks current income,
Objective, Secondary [Text Block] and as a secondary objective, capital appreciation.
Principal LifeTime Hybrid 2015 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2015 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2020 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2020 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2025 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2025 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2030 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2030 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2035 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2035 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2040 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2040 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2045 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2045 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2050 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2050 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2055 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2055 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2060 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2060 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2065 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2065 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Principal LifeTime Hybrid 2070 Fund  
Prospectus [Line Items]  
Risk/Return [Heading] PRINCIPAL LIFETIME HYBRID 2070 FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks a total return consisting of long-term growth of capital and current income.
Real Estate Securities Fund  
Prospectus [Line Items]  
Risk/Return [Heading] REAL ESTATE SECURITIES FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to generate a total return.
Strategic Asset Management Balanced Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] SAM (STRATEGIC ASSET MANAGEMENT) BALANCED PORTFOLIO
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide as high a level of total return (consisting of reinvested income and capital appreciation) as is consistent with reasonable risk.
Strategic Asset Management Conservative Balanced Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] SAM (STRATEGIC ASSET MANAGEMENT) CONSERVATIVE BALANCED PORTFOLIO
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide a high level of total return (consisting of reinvestment of income and capital appreciation), consistent with a moderate degree of principal risk.
Strategic Asset Management Conservative Growth Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] SAM (STRATEGIC ASSET MANAGEMENT) CONSERVATIVE GROWTH PORTFOLIO
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide long-term capital appreciation.
Strategic Asset Management Flexible Income Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] SAM (STRATEGIC ASSET MANAGEMENT) FLEXIBLE INCOME PORTFOLIO
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide a high level of total return (consisting of reinvestment of income with some capital appreciation).
Strategic Asset Management Strategic Growth Portfolio  
Prospectus [Line Items]  
Risk/Return [Heading] SAM (STRATEGIC ASSET MANAGEMENT) STRATEGIC GROWTH PORTFOLIO
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide long-term capital appreciation.
Short-Term Income Fund  
Prospectus [Line Items]  
Risk/Return [Heading] SHORT-TERM INCOME FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide as high a level of current income as is consistent with prudent investment management and stability of principal.
SmallCap Fund  
Prospectus [Line Items]  
Risk/Return [Heading] SMALLCAP FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
SmallCap Growth Fund I  
Prospectus [Line Items]  
Risk/Return [Heading] SMALLCAP GROWTH FUND I
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
SmallCap S&P 600 Index Fund  
Prospectus [Line Items]  
Risk/Return [Heading] SMALLCAP S&P 600 INDEX FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
SmallCap Value Fund II  
Prospectus [Line Items]  
Risk/Return [Heading] SMALLCAP VALUE FUND II
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks long-term growth of capital.
Tax-Exempt Bond Fund  
Prospectus [Line Items]  
Risk/Return [Heading] TAX-EXEMPT BOND FUND
Objective [Heading] Objective
Objective, Primary [Text Block] The Fund seeks to provide a high level of income that is exempt from federal income tax while protecting investors’ capital.