v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Northern Funds
Entity Central Index Key 0000916620
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
C000261794  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2030 INFLATION-LINKED DISTRIBUTING LADDER ETF
Trading Symbol TIPA
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 5
Expense Ratio, Percent 0.10%
AssetsNet $ 18,017,131
Holdings Count | Holding 5
InvestmentCompanyPortfolioTurnover 61.96%
C000261798  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2030 TAX-EXEMPT DISTRIBUTING LADDER ETF
Trading Symbol MUNA
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
AssetsNet $ 9,036,055
Holdings Count | Holding 228
InvestmentCompanyPortfolioTurnover 47.42%
C000261795  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2035 INFLATION-LINKED DISTRIBUTING LADDER ETF
Trading Symbol TIPB
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 5
Expense Ratio, Percent 0.10%
AssetsNet $ 7,951,595
Holdings Count | Holding 10
InvestmentCompanyPortfolioTurnover 31.75%
C000261799  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2035 TAX-EXEMPT DISTRIBUTING LADDER ETF
Trading Symbol MUNB
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
AssetsNet $ 14,137,965
Holdings Count | Holding 247
InvestmentCompanyPortfolioTurnover 0.00%
C000261796  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2045 INFLATION-LINKED DISTRIBUTING LADDER ETF
Trading Symbol TIPC
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 5
Expense Ratio, Percent 0.10%
AssetsNet $ 2,976,603
Holdings Count | Holding 16
InvestmentCompanyPortfolioTurnover 5.28%
C000261790  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2045 TAX-EXEMPT DISTRIBUTING LADDER ETF
Trading Symbol MUNC
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
AssetsNet $ 8,238,553
Holdings Count | Holding 150
InvestmentCompanyPortfolioTurnover 1.29%
C000261797  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2055 INFLATION-LINKED DISTRIBUTING LADDER ETF
Trading Symbol TIPD
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 5
Expense Ratio, Percent 0.10%
AssetsNet $ 1,980,368
Holdings Count | Holding 26
InvestmentCompanyPortfolioTurnover 35.48%
C000261791  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST 2055 TAX-EXEMPT DISTRIBUTING LADDER ETF
Trading Symbol MUND
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
AssetsNet $ 4,151,960
Holdings Count | Holding 98
InvestmentCompanyPortfolioTurnover 0.00%
C000261792  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST INTERMEDIATE TAX-EXEMPT BOND ETF
Trading Symbol TAXI
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 3
Expense Ratio, Percent 0.05%
AssetsNet $ 160,136,647
Holdings Count | Holding 2,398
InvestmentCompanyPortfolioTurnover 11.97%
C000261789  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST SHORT-TERM TAX-EXEMPT BOND ETF
Trading Symbol TAXS
Security Exchange Name NASDAQ
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 3
Expense Ratio, Percent 0.05%
AssetsNet $ 117,757,492
Holdings Count | Holding 1,531
InvestmentCompanyPortfolioTurnover 5.89%
C000261793  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST TAX-EXEMPT BOND ETF
Trading Symbol TAXT
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 3
Expense Ratio, Percent 0.05%
AssetsNet $ 61,078,682
Holdings Count | Holding 1,292
InvestmentCompanyPortfolioTurnover 16.74%
C000271317  
Shareholder Report [Line Items]  
Fund Name NORTHERN TRUST US EQUITY ETF
Trading Symbol NOEQ
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] Semi-Annual
Expenses Paid, Amount $ 2
Expense Ratio, Percent 0.08%
AssetsNet $ 875,699,707
Holdings Count | Holding 409
InvestmentCompanyPortfolioTurnover 0.20%