Nuveen Short Duration and Impact Bond Fund Class A Class I Premier Class Class R6 Retirement Class Regulation S Securities Risk [Member] Risks of Investments in the Fund’s TEFRA Bond Subsidiary [Member] Risks of Investments in the Fund’s Wholly Owned Subsidiaries [Member] Risks of Investments in Short Duration and Impact Bond Fund’s TEFRA Bond Subsidiary[Member] Risks of Investments in the Short Duration and Impact Bond Fund’s Wholly Owned Subsidiaries [Member] S000063523 Member C000205820 Member C000205816 Member C000205819 Member Risks Of Investments In The Funds Wholly Owned Subsidiaries Member Risks Of Investments In Short Duration And Impact Bond Funds TEFRABond Subsidiary Member Risks Of Investments In The Short Duration And Impact Bond Funds Wholly Owned Subsidiaries Member C000205818 Member Risks Of Investments In The Funds TEFRABond Subsidiary Member C000205817 Member Regulation SSecurities Risk Member