v3.26.1
Shareholder Report
 12 Months Ended
Feb. 28, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSR
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 Feb. 28, 2026
Shareholder Report Annual or Semi-Annual annual shareholder report
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 annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to February 28, 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.
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
$79
0.77%
Expenses Paid, Amount $ 79
Expense Ratio, Percent 0.77%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended February 28, 2026, Class A shares of Franklin California Tax-Free Income Fund returned 4.15%. The Fund compares its performance to the  Bloomberg Municipal Bond California Exempt Index, which returned 4.98% for the same period.  
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Selection in A rated bonds
↑
Selection in AA rated bonds
↑
Overweight to BBB rated bonds
Top detractors from performance:
↓
Underweight bonds with five years or less to maturity
↓
Overweight bonds with 20 or more years to maturity
↓
Selection in BBB rated bonds
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 February 28, 2026
 
1 Year
5 Year
10 Year
Class A
4.15
1.11
2.37
Class A (with sales charge)
0.25
0.34
1.98
Bloomberg Municipal Bond Index
4.96
1.44
2.43
Bloomberg Municipal Bond California Exempt Index
4.98
1.45
2.37
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.
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 $ 13,284,092,002
Holdings Count | $ / shares 1,111
Advisory Fees Paid, Amount $ 56,929,729
Investment Company Portfolio Turnover 11.93%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of February 28, 2026)
Total Net Assets
$13,284,092,002
Total Number of Portfolio Holdings
1,111
Total Management Fee Paid
$56,929,729
Portfolio Turnover Rate
11.93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of February 28, 2026)
Portfolio Composition* (% of Total Investments)
image
 [1]
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 annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to February 28, 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.
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
$62
0.61%
Expenses Paid, Amount $ 62
Expense Ratio, Percent 0.61%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended February 28, 2026, Class A1 shares of Franklin California Tax-Free Income Fund returned 4.32%. The Fund compares its performance to the  Bloomberg Municipal Bond California Exempt Index, which returned 4.98% for the same period.  
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Selection in A rated bonds
↑
Selection in AA rated bonds
↑
Overweight to BBB rated bonds
Top detractors from performance:
↓
Underweight bonds with five years or less to maturity
↓
Overweight bonds with 20 or more years to maturity
↓
Selection in BBB rated bonds
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 February 28, 2026
 
1 Year
5 Year
10 Year
Class A1
4.32
1.29
2.48
Class A1 (with sales charge)
0.36
0.51
2.09
Bloomberg Municipal Bond Index
4.96
1.44
2.43
Bloomberg Municipal Bond California Exempt Index
4.98
1.45
2.37
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.
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 $ 13,284,092,002
Holdings Count | $ / shares 1,111
Advisory Fees Paid, Amount $ 56,929,729
Investment Company Portfolio Turnover 11.93%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of February 28, 2026)
Total Net Assets
$13,284,092,002
Total Number of Portfolio Holdings
1,111
Total Management Fee Paid
$56,929,729
Portfolio Turnover Rate
11.93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of February 28, 2026)
Portfolio Composition* (% of Total Investments)
image
 [2]
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 annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to February 28, 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.
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
$119
1.17%
Expenses Paid, Amount $ 119
Expense Ratio, Percent 1.17%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended February 28, 2026, Class C shares of Franklin California Tax-Free Income Fund returned 3.61%. The Fund compares its performance to the  Bloomberg Municipal Bond California Exempt Index, which returned 4.98% for the same period.  
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Selection in A rated bonds
↑
Selection in AA rated bonds
↑
Overweight to BBB rated bonds
Top detractors from performance:
↓
Underweight bonds with five years or less to maturity
↓
Overweight bonds with 20 or more years to maturity
↓
Selection in BBB rated bonds
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 February 28, 2026
 
1 Year
5 Year
10 Year
Class C
3.61
0.71
1.90
Class C (with sales charge)
2.61
0.71
1.90
Bloomberg Municipal Bond Index
4.96
1.44
2.43
Bloomberg Municipal Bond California Exempt Index
4.98
1.45
2.37
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.
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 $ 13,284,092,002
Holdings Count | $ / shares 1,111
Advisory Fees Paid, Amount $ 56,929,729
Investment Company Portfolio Turnover 11.93%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of February 28, 2026)
Total Net Assets
$13,284,092,002
Total Number of Portfolio Holdings
1,111
Total Management Fee Paid
$56,929,729
Portfolio Turnover Rate
11.93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of February 28, 2026)
Portfolio Composition* (% of Total Investments)
image
 [3]
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 annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to February 28, 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.
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
$49
0.48%
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.48%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended February 28, 2026, Class R6 shares of Franklin California Tax-Free Income Fund returned 4.47%. The Fund compares its performance to the  Bloomberg Municipal Bond California Exempt Index, which returned 4.98% for the same period.  
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Selection in A rated bonds
↑
Selection in AA rated bonds
↑
Overweight to BBB rated bonds
Top detractors from performance:
↓
Underweight bonds with five years or less to maturity
↓
Overweight bonds with 20 or more years to maturity
↓
Selection in BBB rated bonds
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 February 28, 2026
 
1 Year
5 Year
10 Year
Class R6
4.47
1.40
2.57
Bloomberg Municipal Bond Index
4.96
1.44
2.43
Bloomberg Municipal Bond California Exempt Index
4.98
1.45
2.37
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.
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 $ 13,284,092,002
Holdings Count | $ / shares 1,111
Advisory Fees Paid, Amount $ 56,929,729
Investment Company Portfolio Turnover 11.93%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of February 28, 2026)
Total Net Assets
$13,284,092,002
Total Number of Portfolio Holdings
1,111
Total Management Fee Paid
$56,929,729
Portfolio Turnover Rate
11.93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of February 28, 2026)
Portfolio Composition* (% of Total Investments)
image
 [4]
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 annual shareholder report contains important information about Franklin California Tax-Free Income Fund for the period March 1, 2025, to February 28, 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.
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
$53
0.52%
Expenses Paid, Amount $ 53
Expense Ratio, Percent 0.52%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
For the twelve months ended February 28, 2026, Advisor Class shares of Franklin California Tax-Free Income Fund returned 4.28%. The Fund compares its performance to the  Bloomberg Municipal Bond California Exempt Index, which returned 4.98% for the same period.  
PERFORMANCE HIGHLIGHTS
Top contributors to performance:
↑
Selection in A rated bonds
↑
Selection in AA rated bonds
↑
Overweight to BBB rated bonds
Top detractors from performance:
↓
Underweight bonds with five years or less to maturity
↓
Overweight bonds with 20 or more years to maturity
↓
Selection in BBB rated bonds
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 February 28, 2026
 
1 Year
5 Year
10 Year
Advisor Class
4.28
1.36
2.56
Bloomberg Municipal Bond Index
4.96
1.44
2.43
Bloomberg Municipal Bond California Exempt Index
4.98
1.45
2.37
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.
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 $ 13,284,092,002
Holdings Count | $ / shares 1,111
Advisory Fees Paid, Amount $ 56,929,729
Investment Company Portfolio Turnover 11.93%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of February 28, 2026)
Total Net Assets
$13,284,092,002
Total Number of Portfolio Holdings
1,111
Total Management Fee Paid
$56,929,729
Portfolio Turnover Rate
11.93%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of February 28, 2026)
Portfolio Composition* (% of Total Investments)
image
 [5]
Updated Prospectus Web Address https://www.franklintempleton.com/regulatory-fund-documents
[1]
* Does not include derivatives, except purchased options, if any.  
[2]
* Does not include derivatives, except purchased options, if any.  
[3]
* Does not include derivatives, except purchased options, if any.  
[4]
* Does not include derivatives, except purchased options, if any.  
[5]
* Does not include derivatives, except purchased options, if any.