Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	May 31, 2025	May 31, 2025	May 31, 2025
C000193017 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	California Municipal Bond Fund (Class R6/JCSRX)
Average Annual Return, Percent	0.07%	1.22%	2.22%
C000001742 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	California Municipal Bond Fund (Class A/TACAX)
Average Annual Return, Percent	(4.13%)	0.21%	1.67%
C000001744 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	California Municipal Bond Fund (Class C/TCCAX)
Average Annual Return, Percent	(1.85%)	0.27%	1.32%
C000178768 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	California Municipal Bond Fund (Class I/JCAFX)
Average Annual Return, Percent	0.01%	1.19%	2.22%
Without Sales Load [Member] \| C000001742 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	California Municipal Bond Fund (Class A/TACAX)—excluding sales charge
Average Annual Return, Percent	(0.14%)	1.02%	2.08%
Without Sales Load [Member] \| C000001744 [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	California Municipal Bond Fund (Class C/TCCAX)—excluding sales charge
Average Annual Return, Percent	(0.89%)	0.27%	1.32%
Bloomberg Municipal Bond Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Bloomberg Municipal Bond Index
Average Annual Return, Percent	2.03%	0.55%	2.13%
Bloomberg California Municipal Bond Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name	Bloomberg California Municipal Bond Index
Average Annual Return, Percent	1.71%	0.33%	2.06%