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JPMorgan California Municipal Money Market Fund Average Annual Total Returns
12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Agency Shares [Member] | Agency      
Prospectus [Line Items]      
Average Annual Return, Percent 2.31% 1.80% 1.20%