Shareholder Report, Holdings (Details)

Apr. 30, 2026

C000061462 [Member] | Net Other Assets and Liabilities [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.00%)

^[1]

C000061462 [Member] | U S Treasury Floating Rate Notes [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.40%

C000061462 [Member] | Repurchase Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

55.20%

C000061462 [Member] | US Treasury Bill Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

24.00%

C000061462 [Member] | US Treasury Notes Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.40%

C000061463 [Member] | Net Other Assets and Liabilities [Member]

Holdings [Line Items]

Percent of Net Asset Value

(0.00%)

^[2]

C000061463 [Member] | U S Treasury Floating Rate Notes [Member]

Holdings [Line Items]

Percent of Net Asset Value

11.40%

C000061463 [Member] | Repurchase Agreements [Member]

Holdings [Line Items]

Percent of Net Asset Value

55.20%

C000061463 [Member] | US Treasury Bill Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

24.00%

C000061463 [Member] | US Treasury Notes Securities [Member]

Holdings [Line Items]

Percent of Net Asset Value

9.40%

[1]	Amount represents less than .1%.
[2]	Amount represents less than .1%.