v3.25.4
Annual Total Returns
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Janus Henderson AAA CLO ETF | Janus Henderson AAA CLO ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 5.18% 7.41% 8.58% 0.49% 1.35%        
Janus Henderson B-BBB CLO ETF | Janus Henderson B-BBB CLO ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 4.61% 11.04% 15.35%            
Janus Henderson Corporate Bond ETF | Janus Henderson Corporate Bond ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 7.70% 3.14% 8.49% (15.71%)          
Janus Henderson Emerging Markets Debt Hard Currency ETF | Janus Henderson Corporate Bond ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 14.28%                
Janus Henderson Income ETF | Janus Henderson Corporate Bond ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 8.07%                
Janus Henderson Mortgage-Backed Securities ETF | Janus Henderson Mortgage-Backed Securities ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 8.67% 1.68% 5.68% (11.51%) (0.43%) 6.09% 6.99%    
Janus Henderson Securitized Income ETF | Janus Henderson Securitized Income ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 6.66% 7.40%              
Janus Henderson Short Duration Income ETF | Janus Henderson Short Duration Income ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 5.45% 6.34% 6.02% (0.08%) (0.18%) 3.07% 4.28% 1.58% 2.07%
Janus Henderson U.S. Real Estate ETF | Janus Henderson U.S. Real Estate ETF                  
Prospectus [Line Items]                  
Annual Return [Percent] 3.02% 7.62% 8.73% (23.30%)          
Janus Henderson Mid Cap Growth Alpha ETF | Janus Henderson Mid Cap Growth Alpha ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 5.37%                
Janus Henderson Small Cap Growth Alpha ETF | Janus Henderson Small Cap Growth Alpha ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 13.57% 12.40% 29.82% (28.96%) 2.72% 35.81% 31.06% (1.45%) 20.54%
Janus Henderson Small/Mid Cap Growth Alpha ETF | Janus Henderson Small/Mid Cap Growth Alpha ETF Shares                  
Prospectus [Line Items]                  
Annual Return [Percent] 9.13% 15.13% 26.88% (23.00%) 8.56% 30.99% 30.21% (3.94%) 23.97%