Janus Henderson Short Duration Flexible Bond 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 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 D | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

3.87%

0.79%

1.25%

Class D | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

3.44%

1.06%

1.33%

Class D | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

5.86%

2.21%

2.38%

[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.