v3.26.1
Shareholder Report
 12 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Franklin California Tax-Free Trust
Entity Central Index Key 0000773478
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual annual shareholder report
Class A  
Shareholder Report [Line Items]  
Fund Name Franklin California Intermediate-Term Tax-Free Income Fund
Class Name Class A
Trading Symbol FCCQX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Franklin California Intermediate-Term Tax-Free Income Fund for the period July 1, 2025, to June 30, 2026.
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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 YEAR? (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
$76
0.74%
[1]
Expenses Paid, Amount $ 76
Expense Ratio, Percent 0.74%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended June 30, 2026, Class A shares of Franklin California Intermediate-Term Tax-Free Income Fund returned 5.56%. The Fund compares its performance to the  Bloomberg Municipal M.F. CA Intermediate Index, which returned 4.79% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight bonds with 20+ years to maturity
↑
Overweight bonds with no external credit rating and BBB rated bonds
↑
Security selection in AA rated securities
Top detractors from performance:
↓
Underweight bonds with five to 10 years to maturity
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended June 30, 2026
 
1 Year
5 Year
10 Year
Class A
5.56
0.81
1.38
Class A (with sales charge)
3.18
0.36
1.15
Bloomberg Municipal Bond Index
7.03
1.05
2.15
Bloomberg Municipal M.F. CA Intermediate Index
4.79
1.07
1.82
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jul. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) DIAL BEN/342-5236 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,421,199,278
Holdings Count | $ / shares 474
Advisory Fees Paid, Amount $ 5,254,898
Investment Company Portfolio Turnover 10.23%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$1,421,199,278
Total Number of Portfolio Holdings
474
Total Management Fee Paid
$5,254,898
Portfolio Turnover Rate
10.23%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [2]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, John Wiley stepped down as portfolio manager of the Fund and James Conn, CFA was added as a portfolio manager of the Fund.
This is a summary of a certain change to the Fund since July 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by November 1, 2026, at  https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) DIAL BEN/342-5236 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number (800) DIAL BEN/342-5236
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class A1  
Shareholder Report [Line Items]  
Fund Name Franklin California Intermediate-Term Tax-Free Income Fund
Class Name Class A1
Trading Symbol FKCIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Franklin California Intermediate-Term Tax-Free Income Fund for the period July 1, 2025, to June 30, 2026.
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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 YEAR? (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
$61
0.59%
[3]
Expenses Paid, Amount $ 61
Expense Ratio, Percent 0.59%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended June 30, 2026, Class A1 shares of Franklin California Intermediate-Term Tax-Free Income Fund returned 5.82%. The Fund compares its performance to the  Bloomberg Municipal M.F. CA Intermediate Index, which returned 4.79% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight bonds with 20+ years to maturity
↑
Overweight bonds with no external credit rating and BBB rated bonds
↑
Security selection in AA rated securities
Top detractors from performance:
↓
Underweight bonds with five to 10 years to maturity
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended June 30, 2026
 
1 Year
5 Year
10 Year
Class A1
5.82
0.98
1.50
Class A1 (with sales charge)
3.42
0.52
1.27
Bloomberg Municipal Bond Index
7.03
1.05
2.15
Bloomberg Municipal M.F. CA Intermediate Index
4.79
1.07
1.82
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jul. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) DIAL BEN/342-5236 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,421,199,278
Holdings Count | $ / shares 474
Advisory Fees Paid, Amount $ 5,254,898
Investment Company Portfolio Turnover 10.23%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$1,421,199,278
Total Number of Portfolio Holdings
474
Total Management Fee Paid
$5,254,898
Portfolio Turnover Rate
10.23%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [4]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, John Wiley stepped down as portfolio manager of the Fund and James Conn, CFA was added as a portfolio manager of the Fund.
This is a summary of a certain change to the Fund since July 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by November 1, 2026, at  https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) DIAL BEN/342-5236 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number (800) DIAL BEN/342-5236
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class C  
Shareholder Report [Line Items]  
Fund Name Franklin California Intermediate-Term Tax-Free Income Fund
Class Name Class C
Trading Symbol FCCIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Franklin California Intermediate-Term Tax-Free Income Fund for the period July 1, 2025, to June 30, 2026.
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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 YEAR? (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
$117
1.14%
[5]
Expenses Paid, Amount $ 117
Expense Ratio, Percent 1.14%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended June 30, 2026, Class C shares of Franklin California Intermediate-Term Tax-Free Income Fund returned 5.12%. The Fund compares its performance to the  Bloomberg Municipal M.F. CA Intermediate Index, which returned 4.79% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight bonds with 20+ years to maturity
↑
Overweight bonds with no external credit rating and BBB rated bonds
↑
Security selection in AA rated securities
Top detractors from performance:
↓
Underweight bonds with five to 10 years to maturity
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended June 30, 2026
 
1 Year
5 Year
10 Year
Class C
5.12
0.41
0.93
Class C (with sales charge)
4.12
0.41
0.93
Bloomberg Municipal Bond Index
7.03
1.05
2.15
Bloomberg Municipal M.F. CA Intermediate Index
4.79
1.07
1.82
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jul. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) DIAL BEN/342-5236 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,421,199,278
Holdings Count | $ / shares 474
Advisory Fees Paid, Amount $ 5,254,898
Investment Company Portfolio Turnover 10.23%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$1,421,199,278
Total Number of Portfolio Holdings
474
Total Management Fee Paid
$5,254,898
Portfolio Turnover Rate
10.23%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [6]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, John Wiley stepped down as portfolio manager of the Fund and James Conn, CFA was added as a portfolio manager of the Fund.
This is a summary of a certain change to the Fund since July 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by November 1, 2026, at  https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) DIAL BEN/342-5236 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number (800) DIAL BEN/342-5236
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Class R6  
Shareholder Report [Line Items]  
Fund Name Franklin California Intermediate-Term Tax-Free Income Fund
Class Name Class R6
Trading Symbol FCCRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Franklin California Intermediate-Term Tax-Free Income Fund for the period July 1, 2025, to June 30, 2026.
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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 YEAR? (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
$47
0.46%
[7]
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.46%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended June 30, 2026, Class R6 shares of Franklin California Intermediate-Term Tax-Free Income Fund returned 5.84%. The Fund compares its performance to the  Bloomberg Municipal M.F. CA Intermediate Index, which returned 4.79% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight bonds with 20+ years to maturity
↑
Overweight bonds with no external credit rating and BBB rated bonds
↑
Security selection in AA rated securities
Top detractors from performance:
↓
Underweight bonds with five to 10 years to maturity
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended June 30, 2026
 
1 Year
5 Year
10 Year
Class R6
5.84
1.09
1.61
Bloomberg Municipal Bond Index
7.03
1.05
2.15
Bloomberg Municipal M.F. CA Intermediate Index
4.79
1.07
1.82
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jul. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) DIAL BEN/342-5236 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$1,421,199,278
Total Number of Portfolio Holdings
474
Total Management Fee Paid
$5,254,898
Portfolio Turnover Rate
10.23%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [8]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, John Wiley stepped down as portfolio manager of the Fund and James Conn, CFA was added as a portfolio manager of the Fund.
This is a summary of a certain change to the Fund since July 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by November 1, 2026, at  https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) DIAL BEN/342-5236 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number (800) DIAL BEN/342-5236
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
Advisor Class  
Shareholder Report [Line Items]  
Fund Name Franklin California Intermediate-Term Tax-Free Income Fund
Class Name Advisor Class
Trading Symbol FRCZX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Franklin California Intermediate-Term Tax-Free Income Fund for the period July 1, 2025, to June 30, 2026.
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.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
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 YEAR? (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
$50
0.49%
[9]
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.49%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended June 30, 2026, Advisor Class shares of Franklin California Intermediate-Term Tax-Free Income Fund returned 5.91%. The Fund compares its performance to the  Bloomberg Municipal M.F. CA Intermediate Index, which returned 4.79% for the same period.
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Overweight bonds with 20+ years to maturity
↑
Overweight bonds with no external credit rating and BBB rated bonds
↑
Security selection in AA rated securities
Top detractors from performance:
↓
Underweight bonds with five to 10 years to maturity
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
AVERAGE ANNUAL TOTAL RETURNS (%) Period Ended June 30, 2026
 
1 Year
5 Year
10 Year
Advisor Class
5.91
1.08
1.60
Bloomberg Municipal Bond Index
7.03
1.05
2.15
Bloomberg Municipal M.F. CA Intermediate Index
4.79
1.07
1.82
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Material Change Date Jul. 01, 2025
Updated Performance Information Location [Text Block]
For current month-end performance, please call Franklin Templeton at (800) DIAL BEN/342-5236 or visit
https://www.franklintempleton.com/investments/options/mutual-funds.
Important data provider notices and terms available at www.franklintempletondatasources.com.
Net Assets $ 1,421,199,278
Holdings Count | $ / shares 474
Advisory Fees Paid, Amount $ 5,254,898
Investment Company Portfolio Turnover 10.23%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Total Net Assets
$1,421,199,278
Total Number of Portfolio Holdings
474
Total Management Fee Paid
$5,254,898
Portfolio Turnover Rate
10.23%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Portfolio Composition* (% of Total Investments)
image
 [10]
Material Fund Change [Text Block]
HOW HAS THE FUND CHANGED?
Effective June 30, 2026, John Wiley stepped down as portfolio manager of the Fund and James Conn, CFA was added as a portfolio manager of the Fund.
This is a summary of a certain change to the Fund since July 1, 2025. For more complete information, you may review the Fund’s current prospectus and any applicable supplements and the Fund’s next prospectus, which we expect to be available by November 1, 2026, at  https://www.franklintempleton.com/regulatory-fund-documents or upon request at (800) DIAL BEN/342-5236 or prospectus.us.franklintempleton@fisglobal.com.
Updated Prospectus Phone Number (800) DIAL BEN/342-5236
Updated Prospectus Email Address prospectus.us.franklintempleton@fisglobal.com
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
[1]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[2]
* Does not include derivatives, except purchased options, if any.  
[3]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[4]
* Does not include derivatives, except purchased options, if any.  
[5]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[6]
* Does not include derivatives, except purchased options, if any.  
[7]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[8]
* Does not include derivatives, except purchased options, if any.  
[9]
* Reflects fee waivers and/or expense reimbursements, without which expenses would have been higher.
[10]
* Does not include derivatives, except purchased options, if any.