Janus Henderson Developed World Bond Fund Average Annual Total Returns - Class A C S I N T Shares [Member]

12 Months Ended

60 Months Ended

120 Months Ended

267 Months Ended

Jun. 30, 2026

Dec. 31, 2025

Dec. 31, 2025

Dec. 31, 2025

Dec. 31, 2025

Bloomberg Global Aggregate Bond Index (Unhedged) (reflects no deduction for expenses, fees, or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

8.17%

(2.15%)

1.26%

2.62%

Bloomberg Global Aggregate Credit Index (USD Hedged) (reflects no deduction for expenses, fees, or taxes)[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.80%

0.41%

3.15%

3.92%

Class A | After Taxes on Distributions

Prospectus [Line Items]

Average Annual Return, Percent

(0.06%)

(3.32%)

0.61%

2.03%

Class A | After Taxes on Distributions and Sales

Prospectus [Line Items]

Average Annual Return, Percent

^[1]

0.75%

(2.11%)

0.91%

2.17%

Class A | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[2]

1.30%

(2.12%)

1.90%

3.66%

Performance Inception Date

Sep. 30, 2003

Class C | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

^[3]

4.61%

(1.89%)

1.64%

3.10%

Class S | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.12%

(1.41%)

2.20%

3.79%

Class I | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.48%

(0.96%)

2.63%

4.05%

Class N | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.56%

(0.95%)

2.66%

4.01%

Class T | Return Before Taxes[Member]

Prospectus [Line Items]

Average Annual Return, Percent

6.29%

(1.19%)

2.42%

3.90%

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