010000 - Document - Document and Entity Information {Elements}
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020102 - Disclosure - Risk/Return Detail Data (Nuveen Bond Index Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020104 - Disclosure - Risk/Return Detail Data (Nuveen Core Bond Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020106 - Disclosure - Risk/Return Detail Data (Nuveen Core Impact Bond Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020108 - Disclosure - Risk/Return Detail Data (Nuveen Core Plus Bond Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020110 - Disclosure - Risk/Return Detail Data (Nuveen 5-15 Year Laddered Tax Exempt Bond Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020112 - Disclosure - Risk/Return Detail Data (Nuveen Green Bond Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020114 - Disclosure - Risk/Return Detail Data (Nuveen High Yield Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020116 - Disclosure - Risk/Return Detail Data (Nuveen Short Duration Impact Bond Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020118 - Disclosure - Risk/Return Detail Data (Nuveen Short Term Bond Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020120 - Disclosure - Risk/Return Detail Data (Nuveen Short Term Bond Index Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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020122 - Disclosure - Risk/Return Detail Data (Nuveen Money Market Fund) {Elements}
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020101 - Schedule - Risk Table {Transposed}
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010004 - Schedule - Investment Risks {Unlabeled}
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