Organization - Additional Information (Detail) |
6 Months Ended | ||||
|---|---|---|---|---|---|
|
Jun. 30, 2026
Trust
CreationUnit
shares
|
Dec. 31, 2025
shares
|
Dec. 31, 2024
shares
|
Feb. 23, 2015
shares
|
Aug. 03, 2006
Trust
|
|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||
| Number of series of trusts | Trust | 5 | 5 | |||
| General shares, shares issued | 40 | 40 | 40 | 40 | |
| Treasury obligation measurement maximum maturity period | 12 months | ||||
| Minimum number of Creation Units that can be purchased | CreationUnit | 1 | ||||
| Number of shares issued per Creation Unit | 50,000 |