v3.25.2
NT Tax Exempt Bond ETF [Member] N-1A Cover
Aug. 05, 2025
Prospectus [Line Items]  
Document Type 485BPOS
Amendment Flag false
Registrant Name NORTHERN FUNDS
Entity Central Index Key 0000916620
Entity Investment Company Type N-1A
Document Period End Date Aug. 05, 2025
Prospectus Date Aug. 06, 2025