v3.26.1
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 60 Months Ended 67 Months Ended
May 31, 2026
May 31, 2026
May 31, 2026
Without Sales Load [Member] | C000222751      
Average Annual Return [Line Items]      
Average Annual Return, Percent 4.21% 2.45% 3.00%
Without Sales Load [Member] | C000222752      
Average Annual Return [Line Items]      
Average Annual Return, Percent 4.32% 2.56% 3.10%
Without Sales Load [Member] | C000222750      
Average Annual Return [Line Items]      
Average Annual Return, Percent 4.43% 2.67% 3.22%
Bloomberg U.S. Aggregate Bond Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 5.13% 0.17% (0.07%)
Bloomberg U.S. Aggregate Bond Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 5.13% 0.17% (0.07%)
Bloomberg U.S. Aggregate Bond Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 5.13% 0.17% (0.07%)
Bloomberg U.S. 1-5 Year Treasury TIPS Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 4.51% 3.11% 3.62%
Bloomberg U.S. 1-5 Year Treasury TIPS Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 4.51% 3.11% 3.62%
Bloomberg U.S. 1-5 Year Treasury TIPS Index      
Average Annual Return [Line Items]      
Average Annual Return, Percent 4.51% 3.11% 3.62%