Janus Henderson Flexible Bond 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%

Class A | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

2.06%

(1.34%)

1.63%

Class C | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[2]

5.63%

(1.04%)

1.46%

Class S | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

7.20%

(0.55%)

2.00%

Class I | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

7.65%

(0.09%)

2.46%

Class N | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

7.62%

(0.05%)

2.51%

Class R | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.83%

(0.79%)

1.76%

Class T | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

5.36%

(1.74%)

0.95%

Class T | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

^[3]

4.33%

(0.85%)

1.16%

Class T | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

7.37%

(0.31%)

2.27%

[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.