Janus Henderson High-Yield Fund Average Annual Total Returns - Class D Shares [Member]

12 Months Ended

60 Months Ended

120 Months Ended

Dec. 31, 2025

Dec. 31, 2025

Dec. 31, 2025

Bloomberg U.S. Aggregate Bond Index (reflects no deduction for expenses, fees, or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

7.30%

(0.36%)

2.01%

Bloomberg U.S. Corporate High-Yield Bond Index (reflects no deduction for expenses, fees, or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

8.62%

4.51%

6.53%

Class D | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

6.18%

1.03%

2.86%

Class D | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

5.32%

1.56%

2.99%

Class D | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

9.11%

3.52%

5.35%

[1]	If the Fund incurs a loss, which generates a tax benefit, the Return After Taxes on Distributions and Sale of Fund Shares may exceed the Fund’s other return figures.