S000001251 [Member] Expense Example - CALIFORNIA TAX-EXEMPT FUND - CALIFORNIA TAX-EXEMPT FUND	Mar. 31, 2026 USD ($)
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 47
Expense Example, with Redemption, 3 Years	172
Expense Example, with Redemption, 5 Years	307
Expense Example, with Redemption, 10 Years	$ 703

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Form N-1A
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
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