Janus Henderson High-Yield Fund Average Annual Total Returns - Class A C S I N R T 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 A | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

3.68%

2.32%

4.61%

Class C | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[2]

7.14%

2.58%

4.41%

Class S | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

8.71%

3.12%

4.96%

Class I | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

9.13%

3.52%

5.40%

Class N | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

9.24%

3.68%

5.51%

Class R | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

8.44%

2.86%

4.69%

Class T | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

6.10%

0.94%

2.80%

Class T | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

^[3]

5.24%

1.48%

2.93%

Class T | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

8.98%

3.39%

5.25%

[1]	Calculated assuming maximum permitted sales loads.
[2]	The one year return is calculated to include the contingent deferred sales charge.
[3]	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.