Janus Henderson Short Duration Flexible Bond Fund Average Annual Total Returns - Class A C S I N 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 1-3 Year U.S. Government/Credit Index (reflects no deduction for expenses, fees, or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

5.35%

1.97%

2.09%

Class A | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

3.51%

1.58%

1.94%

Class C | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[2]

3.93%

1.34%

1.45%

Class S | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

5.48%

1.84%

1.99%

Class I | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

5.93%

2.27%

2.39%

Class N | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.00%

2.27%

2.44%

Class T | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

3.80%

0.72%

1.19%

Class T | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

^[3]

3.37%

1.00%

1.26%

Class T | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

5.74%

2.10%

2.26%

[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.