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Presentation of Financial Statements	3 Months Ended
Presentation of Financial Statements	Jul. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Presentation of Financial Statements	Presentation of Financial Statements As of July 31, 2025, Casey’s General Stores, Inc. and its subsidiaries (hereinafter referred to as the "Company" or "Casey’s") operate 2,895 convenience stores in 19 states, primarily in the Midwest. Many of the stores are located in smaller communities, often with populations of less than 20,000. The accompanying condensed consolidated financial statements include the accounts and transactions of Casey's General Stores, Inc. and its direct and indirect wholly-owned subsidiaries. All material intercompany balances and transactions have been eliminated in consolidation.