v3.25.3
Shareholder Report
6 Months Ended
Aug. 31, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Franklin California Tax Free Income Fund
Entity Central Index Key 0000225375
Entity Investment Company Type N-1A
Document Period End Date Aug. 31, 2025
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin California Tax-Free Income Fund
Class Name Class A
Trading Symbol FTFQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to August 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$38
0.76%
[1]
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.76%
Net Assets $ 12,582,665,918
Holdings Count | $ / shares 1,131
Investment Company Portfolio Turnover 6.99%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of August 31, 2025)
Total Net Assets
$12,582,665,918
Total Number of Portfolio Holdings
1,131
Portfolio Turnover Rate
6.99%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of August 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[2]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A1  
Shareholder Report [Line Items]  
Fund Name Franklin California Tax-Free Income Fund
Class Name Class A1
Trading Symbol FKTFX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to August 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A1
$30
0.61%
[3]
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.61%
Net Assets $ 12,582,665,918
Holdings Count | $ / shares 1,131
Investment Company Portfolio Turnover 6.99%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of August 31, 2025)
Total Net Assets
$12,582,665,918
Total Number of Portfolio Holdings
1,131
Portfolio Turnover Rate
6.99%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of August 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[4]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin California Tax-Free Income Fund
Class Name Class C
Trading Symbol FRCTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to August 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class C
$58
1.16%
[5]
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.16%
Net Assets $ 12,582,665,918
Holdings Count | $ / shares 1,131
Investment Company Portfolio Turnover 6.99%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of August 31, 2025)
Total Net Assets
$12,582,665,918
Total Number of Portfolio Holdings
1,131
Portfolio Turnover Rate
6.99%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of August 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[6]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin California Tax-Free Income Fund
Class Name Class R6
Trading Symbol FKTQX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to August 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class R6
$23
0.47%
[7]
Expenses Paid, Amount $ 23
Expense Ratio, Percent 0.47%
Net Assets $ 12,582,665,918
Holdings Count | $ / shares 1,131
Investment Company Portfolio Turnover 6.99%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of August 31, 2025)
Total Net Assets
$12,582,665,918
Total Number of Portfolio Holdings
1,131
Portfolio Turnover Rate
6.99%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of August 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[8]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin California Tax-Free Income Fund
Class Name Advisor Class
Trading Symbol FCAVX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to August 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.franklintempleton.com/regulatory-fund-documents. You can also request this information by contacting us at (800) DIAL BEN/342-5236.
Additional Information Phone Number (800) DIAL BEN/342-5236
Additional Information Website https://www.franklintempleton.com/regulatory-fund-documents
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Class Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Advisor Class
$25
0.51%
[9]
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.51%
Net Assets $ 12,582,665,918
Holdings Count | $ / shares 1,131
Investment Company Portfolio Turnover 6.99%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of August 31, 2025)
Total Net Assets
$12,582,665,918
Total Number of Portfolio Holdings
1,131
Portfolio Turnover Rate
6.99%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of August 31, 2025)
Portfolio Composition* (% of Total Investments)
image
[10]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
[1]
Annualized.
[2]
* Does not include derivatives, except purchased options, if any.  
[3]
Annualized.
[4]
* Does not include derivatives, except purchased options, if any.  
[5]
Annualized.
[6]
* Does not include derivatives, except purchased options, if any.  
[7]
Annualized.
[8]
* Does not include derivatives, except purchased options, if any.  
[9]
Annualized.
[10]
* Does not include derivatives, except purchased options, if any.