v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000255373 | SWEEPUSDJPM  
Holdings [Line Items]  
Percent of Net Asset Value 58.10%
C000255373 | 78462F103  
Holdings [Line Items]  
Percent of Net Asset Value 48.60%
C000255373 | WEBS2840215CLS  
Holdings [Line Items]  
Percent of Net Asset Value (6.60%)
C000255373 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000255373 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 48.60%
C000255373 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 58.10%
C000255373 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value (6.60%)
C000255375 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 53.80%
C000255375 | 46090E103  
Holdings [Line Items]  
Percent of Net Asset Value 49.40%
C000255375 | WEBSBDQYP67CLS  
Holdings [Line Items]  
Percent of Net Asset Value (3.10%)
C000255375 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000255375 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 49.40%
C000255375 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 53.80%
C000255375 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value (3.10%)
C000259001 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 51.10%
C000259001 | 81369Y506  
Holdings [Line Items]  
Percent of Net Asset Value 44.00%
C000259001 | WEBS2402466WFB  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000259001 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (1.90%)
C000259001 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 44.00%
C000259001 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 51.10%
C000259001 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 6.80%
C000258997 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 41.60%
C000258997 | 81369Y100  
Holdings [Line Items]  
Percent of Net Asset Value 48.90%
C000258997 | WEBS2436841CLS  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
C000258997 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (1.40%)
C000258997 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 48.90%
C000258997 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 41.60%
C000258997 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 10.90%
C000259003 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 39.40%
C000259003 | 81369Y704  
Holdings [Line Items]  
Percent of Net Asset Value 48.80%
C000259003 | WEBS2502139CF  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
C000259003 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000259003 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 48.80%
C000259003 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 39.40%
C000259003 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 11.80%
C000258999 | SWEEPUSDJPM  
Holdings [Line Items]  
Percent of Net Asset Value 50.80%
C000258999 | 81369Y407  
Holdings [Line Items]  
Percent of Net Asset Value 56.10%
C000258999 | WEBS2424341CLS  
Holdings [Line Items]  
Percent of Net Asset Value (5.70%)
C000258999 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000258999 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 56.10%
C000258999 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 50.80%
C000258999 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value (5.70%)
C000259005 | SWEEPUSDJPM  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000259005 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 39.50%
C000259005 | 81369Y308  
Holdings [Line Items]  
Percent of Net Asset Value 50.80%
C000259005 | WEBS2369389CF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000259005 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value 0.00%
C000259005 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 50.80%
C000259005 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 46.40%
C000259005 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000258998 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 44.30%
C000258998 | 81369Y209  
Holdings [Line Items]  
Percent of Net Asset Value 48.20%
C000258998 | WEBS2371823CLS  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000258998 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000258998 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 48.20%
C000258998 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 44.30%
C000258998 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 7.60%
C000259002 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 48.50%
C000259002 | 81369Y605  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
C000259002 | WEBS2364038CF  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
C000259002 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000259002 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 51.90%
C000259002 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 48.50%
C000259002 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value (0.30%)
C000259004 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 41.30%
C000259004 | 81369Y803  
Holdings [Line Items]  
Percent of Net Asset Value 48.60%
C000259004 | WEBS2369709WFB  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000259004 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000259004 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 48.60%
C000259004 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 41.30%
C000259004 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 10.20%
C000259000 | SWEEPUSDJPM  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000259000 | SWEEPUSDCitibank - New York  
Holdings [Line Items]  
Percent of Net Asset Value 34.30%
C000259000 | 81369Y852  
Holdings [Line Items]  
Percent of Net Asset Value 49.60%
C000259000 | WEBSBFXHC51CF  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000259000 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000259000 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 49.60%
C000259000 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 41.60%
C000259000 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000259007 | SWEEPUSDJPM  
Holdings [Line Items]  
Percent of Net Asset Value 42.20%
C000259007 | 81369Y886  
Holdings [Line Items]  
Percent of Net Asset Value 48.40%
C000259007 | WEBS2371812WFB  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000259007 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000259007 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 48.40%
C000259007 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 42.20%
C000259007 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000259006 | SWEEPUSDJPM  
Holdings [Line Items]  
Percent of Net Asset Value 41.40%
C000259006 | 81369Y860  
Holdings [Line Items]  
Percent of Net Asset Value 53.00%
C000259006 | WEBSBYZ65Y9WFB  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000259006 | Other Assets less Liabilities  
Holdings [Line Items]  
Percent of Net Asset Value (0.10%)
C000259006 | Exchange-Traded Funds  
Holdings [Line Items]  
Percent of Net Asset Value 53.00%
C000259006 | Asset Time Deposits  
Holdings [Line Items]  
Percent of Net Asset Value 41.40%
C000259006 | Swaps  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%