v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000274169 [Member] | Palm RE Ltd 6 7 2029 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000274169 [Member] | Kilimanjaro II Re Ltd 7 8 2030 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000274169 [Member] | Kendall Re Ltd 4 30 2027 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000274169 [Member] | Cape Lookout Re Ltd 3 13 2028 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000274169 [Member] | Recoletos Re DAC 1 7 2028 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000274169 [Member] | Blue Ridge Re Ltd 1 8 2027 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000274169 [Member] | Ocelot Re Ltd 2 26 2029 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000274169 [Member] | Mona Lisa Re Ltd 1 8 2031 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000274169 [Member] | Bridge Street Re Ltd 1 7 2028 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000274169 [Member] | Foundation Re IV Ltd 1 8 2027 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000274169 [Member] | Global [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.20%
C000274169 [Member] | Europe [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000274169 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 46.40%
C000274169 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000274169 [Member] | Liabilities in Excess of Other Assets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.60%)
C000274169 [Member] | Preferred Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000274169 [Member] | Event Linked Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 78.50%
C000274169 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000231837 [Member] | Palm RE Ltd 6 7 2029 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000231837 [Member] | Kilimanjaro II Re Ltd 7 8 2030 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000231837 [Member] | Kendall Re Ltd 4 30 2027 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000231837 [Member] | Cape Lookout Re Ltd 3 13 2028 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000231837 [Member] | Recoletos Re DAC 1 7 2028 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000231837 [Member] | Blue Ridge Re Ltd 1 8 2027 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000231837 [Member] | Ocelot Re Ltd 2 26 2029 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000231837 [Member] | Mona Lisa Re Ltd 1 8 2031 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000231837 [Member] | Bridge Street Re Ltd 1 7 2028 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000231837 [Member] | Foundation Re IV Ltd 1 8 2027 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000231837 [Member] | Global [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 25.20%
C000231837 [Member] | Europe [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000231837 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 46.40%
C000231837 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000231837 [Member] | Liabilities in Excess of Other Assets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.60%)
C000231837 [Member] | Preferred Notes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000231837 [Member] | Event Linked Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 78.50%
C000231837 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000237757 [Member] | United States Treasury Note 3 500 2 28 2031 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 94.60%
C000237757 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000237757 [Member] | US Treasury Notes Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 94.60%
C000237757 [Member] | Other Assets in Excess of Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%