acctfmf20140106_485bpos.htm

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in American Century Investments funds. More information about these and other discounts is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 81% of the average value of its portfolio.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in American Century Investments funds. More information about these and other discounts is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that you earn a 5% return each year, and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund invests in California municipal and other debt securities with an emphasis on high-yield securities. A high-yield security is one that has been rated below investment-grade, or determined by the investment advisor to be of similar quality. Under normal market conditions, the portfolio managers invest at least 80% of the fund's net assets in municipal securities with income payments exempt from federal and California income taxes. Cities, counties and other municipalities in California and U. S. territories usually issue these securities for public projects, such as schools, roads, and water and sewer systems. Some of these investments are not necessarily exempt from the federal alternative minimum tax.

The portfolio managers seek to invest in securities that will result in a high yield for the fund. To accomplish this, the portfolio managers buy securities that are rated below investment-grade, including so-called junk bonds and bonds that are in technical or monetary default. Issuers of these securities often have short financial histories or have questionable credit or have had and may continue to have problems making interest and principal payments.

The portfolio managers also may buy unrated securities if they determine such securities meet the investment objectives of the fund.

Although the fund invests primarily for income, it also employs techniques designed to realize capital appreciation. For example, the portfolio managers may select bonds with maturities and coupon rates that position the fund for potential capital appreciation for a variety of reasons, including their view on the direction of future interest-rate movements and the potential for a credit upgrade.

When determining whether to sell a security, the portfolio managers consider, among other things, current and anticipated changes in interest rates, the credit quality of a particular issuer, comparable alternatives, general market conditions and any other factor deemed relevant by the portfolio managers.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

•	Credit Risk – The fund's investments often have high credit risk, which helps the fund pursue a higher yield than more conservatively managed bond funds. Issuers of high-yield securities are more vulnerable to real or perceived economic changes (such as an economic downturn or a prolonged period of rising interest rates), political changes or adverse developments specific to the issuer. Adverse economic, political and other developments may be more likely to cause an issuer of low-quality bonds to default on its obligation to pay interest and principal due under its securities.
	The fund invests a significant part of its assets in securities rated below investment-grade or that are unrated, including bonds that are in technical or monetary default. By definition, the issuers of many of these securities have had and may continue to have problems making interest and principal payments.
•	Interest Rate Risk – When interest rates change, the fund's share value will be affected. Generally, the value of debt securities and the funds that hold them decline as interest rates rise. Because the fund typically invests in intermediate-term and long-term bonds, the fund's interest rate risk is generally higher than for funds with shorter-weighted average maturities, such as money market and short-term bond funds.
•	California Economic Risk – The fund will be sensitive to events that affect California's economy. Significant political or economic developments in California will likely impact virtually all municipal securities issued in the state. Because the fund invests primarily in California municipal securities, it may have a higher level of risk than funds that invest in a larger universe of securities.
•	Municipal Securities Risk – Because the fund invests primarily in municipal securities, it will be sensitive to events that affect municipal markets, including legislative or political changes and the financial condition of the issuers of municipal securities. The fund may have a higher level of risk than funds that invest in a larger universe of securities.
•	Liquidity Risk – The fund may also be subject to liquidity risk. During periods of market turbulence or unusually low trading activity, in order to meet redemptions, it may be necessary for the fund to sell securities at prices that could have an adverse effect on the fund's share price.
•	Nondiversification – The fund is classified as nondiversified. A nondiversified fund may invest a greater percentage of its assets in a smaller number of securities than a diversified fund. This gives the managers the flexibility to hold large positions in a small number of securities. If so, a price change in any one of those securities may have a greater impact on the fund's share price than would be the case in a diversified fund.

•	Tax Risk – Some or all of the fund's income may be subject to the federal alternative minimum tax. There is no guarantee that all of the fund's income will remain exempt from federal or state income taxes. Income from municipal bonds held by a fund could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or state tax authorities, or noncompliant conduct of a bond issuer.
•	Market Risk – The value of securities owned by the fund may go up and down, sometimes rapidly or unpredictably.
•	Principal Loss – At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.

An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Nondiversification - The fund is classified as nondiversified. A nondiversified fund may invest a greater percentage of its assets in a smaller number of securities than a diversified fund. This gives the managers the flexibility to hold large positions in a small number of securities. If so, a price change in any one of those securities may have a greater impact on the fund's share price than would be the case in a diversified fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund's performance from year to year for Investor Class shares. The table shows how the fund's average annual returns for the periods shown compared with those of a broad measure of market performance.

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.

Year to Date Return, Label

rr_YearToDateReturnLabel

Investor Class year-to-date

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

(3.59%)

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Performance Quarter

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(9.36%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary.

1 year

rr_AverageAnnualReturnYear01

6.78%

10 years

rr_AverageAnnualReturnYear10

5.10%

Prospectus [Line Items]

rr_ProspectusLineItems

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Management Fee

rr_ManagementFeesOverAssets

0.49%

Other Expenses

rr_OtherExpensesOverAssets

0.01%

1 year

rr_ExpenseExampleYear01

51

5 years

rr_ExpenseExampleYear05

280

Annual Return 2003

rr_AnnualReturn2003

5.72%

Annual Return 2005

rr_AnnualReturn2005

6.80%

Annual Return 2007

rr_AnnualReturn2007

(0.33%)

Annual Return 2009

rr_AnnualReturn2009

20.43%

Annual Return 2011

rr_AnnualReturn2011

11.02%

1 year

rr_AverageAnnualReturnYear01

11.09%

10 years

rr_AverageAnnualReturnYear10

5.46%

1 year

rr_AverageAnnualReturnYear01

11.09%

10 years

rr_AverageAnnualReturnYear10

5.46%

1 year

rr_AverageAnnualReturnYear01

8.81%

10 years

rr_AverageAnnualReturnYear10

5.39%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $10,000)

rr_MaximumAccountFee

none

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.30%

3 years

rr_ExpenseExampleYear03

97

10 years

rr_ExpenseExampleYear10

381

Since Inception

rr_AverageAnnualReturnSinceInception

8.71%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $10,000)

rr_MaximumAccountFee

none

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.75%

3 years

rr_ExpenseExampleYear03

679

10 years

rr_ExpenseExampleYear10

1,339

5 years

rr_AverageAnnualReturnYear05

4.78%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2003

Prospectus [Line Items]

rr_ProspectusLineItems

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase)

rr_MaximumDeferredSalesChargeOverOfferingPrice

1.00%

Management Fee

rr_ManagementFeesOverAssets

0.49%

Other Expenses

rr_OtherExpensesOverAssets

0.01%

1 year

rr_ExpenseExampleYear01

153

5 years

rr_ExpenseExampleYear05

819

1 year

rr_AverageAnnualReturnYear01

9.99%

Since Inception

rr_AverageAnnualReturnSinceInception

4.54%

Risk/Return [Heading]

rr_RiskReturnHeading

CALIFORNIA INTERMEDIATE-TERM TAX-FREE BOND FUND

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks safety of principal and high current income that is exempt from federal and California income taxes.

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in American Century Investments funds. More information about these and other discounts is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 46% of the average value of its portfolio.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in American Century Investments funds. More information about these and other discounts is available from your financial professional and in Calculation of Sales Charges on page 12 of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that you earn a 5% return each year, and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The portfolio managers primarily buy investment-grade debt securities and, under normal market conditions, will invest at least 80% of the fund's net assets in debt securities that have interest payments exempt from federal and California income taxes. Cities, counties and other municipalities in California and U.S. territories, such as Puerto Rico, issue these securities.

The fund's weighted average maturity will be not less than three years nor more than ten years. However, there is no maturity limit on individual securities.

Although the fund invests primarily in investment-grade securities, up to 20% of the value of the fund's net assets may be invested in below investment-grade securities (BB and below). The fund also may invest in securities which, while not rated, are determined by the portfolio managers to be of comparable credit quality to those rated below investment-grade.

When determining whether to sell a security, portfolio managers consider, among other things, current and anticipated changes in interest rates, the credit quality of a particular issuer, comparable alternatives, general market conditions and any other factor deemed relevant by the portfolio managers.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

•	Credit Risk – Debt securities, even investment-grade debt securities, are subject to credit risk. Credit risk is the risk that the inability or perceived inability of the issuer to make interest and principal payments will cause the value of the securities to decrease. As a result, the fund's share price could also decrease. Changes in the credit rating of a debt security held by the fund could have a similar effect.
•	Interest Rate Risk – Investments in debt securities are also sensitive to interest rate changes. Generally, the value of debt securities and the funds that hold them decline as interest rates rise. The fund's interest rate risk is moderate under normal market conditions, but it may fluctuate as the portfolio managers reposition the fund in response to changing market conditions.
•	California Economic Risk – The fund will be sensitive to events that affect California's economy. Significant political or economic developments in California will likely impact virtually all municipal securities issued in the state. Because the fund invests primarily in California municipal securities, it may have a higher level of risk than funds that invest in a larger universe of securities.
•	Municipal Securities Risk – The fund invests primarily in municipal securities, it will be sensitive to events that affect municipal markets, including legislative or political changes and the financial condition of the issuers of municipal securities. By investing primarily in municipal securities, the fund may have a higher level of risk than funds that invest in a larger universe of securities.
•	Loss of Tax Exemptions Risk – There is no guarantee that all of the fund's income will be exempt from federal or state income taxes. Income from municipal bonds held by the fund could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or state tax authorities, or noncompliant conduct of a bond issuer.
•	Liquidity Risk – The fund may also be subject to liquidity risk. During periods of market turbulence or unusually low trading activity, in order to meet redemptions it may be necessary for the fund to sell securities at prices that could have an adverse effect on the fund's share price.
•	Market Risk – The value of securities owned by the fund may go up and down, sometimes rapidly or unpredictably.
•	Principal Loss – At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.

An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund's performance from year to year for Investor Class shares. The table shows how the fund's average annual returns for the periods shown compared with those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. For current performance information, including yields, please visit americancentury.com.

Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

americancentury.com

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Returns

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest Performance Quarter (3Q 2009): 6.57%

Lowest Performance Quarter (4Q 2010): -4.11%

As of September 30, 2013, the most recent calendar quarter end, the fund's Investor Class year-to-date return was -1.61%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2013

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Performance Quarter

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

6.57%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2010

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns For the calendar year ended December 31, 2012

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

After-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold their fund shares through tax-deferred arrangements, such as 401(k) plans or IRAs.

Prospectus [Line Items]

rr_ProspectusLineItems

5 years

rr_AverageAnnualReturnYear05

6.21%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $10,000)

rr_MaximumAccountFee

25

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.47%

3 years

rr_ExpenseExampleYear03

151

10 years

rr_ExpenseExampleYear10

592

Annual Return 2004

rr_AnnualReturn2004

2.80%

Annual Return 2006

rr_AnnualReturn2006

4.00%

Annual Return 2008

rr_AnnualReturn2008

(0.58%)

Annual Return 2010

rr_AnnualReturn2010

2.09%

Annual Return 2012

rr_AnnualReturn2012

5.94%

5 years

rr_AverageAnnualReturnYear05

5.39%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 09, 1983

Prospectus [Line Items]

rr_ProspectusLineItems

5 years

rr_AverageAnnualReturnYear05

5.39%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 09, 1983

Prospectus [Line Items]

rr_ProspectusLineItems

5 years

rr_AverageAnnualReturnYear05

5.14%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 09, 1983

Prospectus [Line Items]

rr_ProspectusLineItems

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Management Fee

rr_ManagementFeesOverAssets

0.26%

Other Expenses

rr_OtherExpensesOverAssets

0.01%

1 year

rr_ExpenseExampleYear01

28

5 years

rr_ExpenseExampleYear05

152

1 year

rr_AverageAnnualReturnYear01

6.15%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2010

Prospectus [Line Items]

rr_ProspectusLineItems

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

^[1]

Management Fee

rr_ManagementFeesOverAssets

0.46%

Other Expenses

rr_OtherExpensesOverAssets

0.01%

1 year

rr_ExpenseExampleYear01

520

5 years

rr_ExpenseExampleYear05

833

1 year

rr_AverageAnnualReturnYear01

0.90%

10 years

rr_AverageAnnualReturnYear10

3.44%

^[2]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $10,000)

rr_MaximumAccountFee

none

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.47%

3 years

rr_ExpenseExampleYear03

466

10 years

rr_ExpenseExampleYear10

1,756

5 years

rr_AverageAnnualReturnYear05

4.35%

^[2]

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2010

Prospectus [Line Items]

rr_ProspectusLineItems

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

44.00%

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

100,000

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds.

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Lose Money [Text]

rr_RiskLoseMoney

Principal Loss - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund's performance from year to year for Investor Class shares. The table shows how the fund's average annual returns for the periods shown compared with those of a broad measure of market performance.

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.

Year to Date Return, Label

rr_YearToDateReturnLabel

Investor Class year-to-date

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

(2.85%)

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Performance Quarter

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(5.52%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

The after-tax returns are shown only for Investor Class shares. After-tax returns for other share classes will vary.

1 year

rr_AverageAnnualReturnYear01

6.78%

10 years

rr_AverageAnnualReturnYear10

5.10%

Prospectus [Line Items]

rr_ProspectusLineItems

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Management Fee

rr_ManagementFeesOverAssets

0.46%

Other Expenses

rr_OtherExpensesOverAssets

0.01%

1 year

rr_ExpenseExampleYear01

48

5 years

rr_ExpenseExampleYear05

264

Annual Return 2003

rr_AnnualReturn2003

4.51%

Annual Return 2005

rr_AnnualReturn2005

3.32%

Annual Return 2007

rr_AnnualReturn2007

1.59%

Annual Return 2009

rr_AnnualReturn2009

13.74%

Annual Return 2011

rr_AnnualReturn2011

11.95%

1 year

rr_AverageAnnualReturnYear01

8.60%

10 years

rr_AverageAnnualReturnYear10

4.68%

1 year

rr_AverageAnnualReturnYear01

8.60%

10 years

rr_AverageAnnualReturnYear10

4.65%

1 year

rr_AverageAnnualReturnYear01

6.84%

10 years

rr_AverageAnnualReturnYear10

4.62%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $10,000)

rr_MaximumAccountFee

none

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.27%

3 years

rr_ExpenseExampleYear03

87

10 years

rr_ExpenseExampleYear10

344

Since Inception

rr_AverageAnnualReturnSinceInception

7.49%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $10,000)

rr_MaximumAccountFee

none

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.72%

3 years

rr_ExpenseExampleYear03

670

10 years

rr_ExpenseExampleYear10

1,305

5 years

rr_AverageAnnualReturnYear05

4.48%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 28, 2007

Prospectus [Line Items]

rr_ProspectusLineItems

Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase)

rr_MaximumDeferredSalesChargeOverOfferingPrice

1.00%

Management Fee

rr_ManagementFeesOverAssets

0.46%

Other Expenses

rr_OtherExpensesOverAssets

0.01%

1 year

rr_ExpenseExampleYear01

150

5 years

rr_ExpenseExampleYear05

803

1 year

rr_AverageAnnualReturnYear01

7.52%

Since Inception

rr_AverageAnnualReturnSinceInception

4.54%

Risk/Return [Heading]

rr_RiskReturnHeading

CALIFORNIA TAX-FREE MONEY MARKET FUND

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks safety of principal and high current income that is exempt from federal and California income taxes.

Expense Narrative [Text Block]

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The following table describes the fees and expenses you may pay if you buy and hold shares of the fund.

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example Narrative [Text Block]

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The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds.

Strategy [Heading]

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Principal Investment Strategies

Risk [Heading]

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Principal Risks

Risk Lose Money [Text]

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Principal Loss - An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in it.

Risk Not Insured Depository Institution [Text]

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An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the fund's performance from year to year. The fund's past performance is not necessarily an indication of how the fund will perform in the future. For current performance information, including yields, please visit americancentury.com.

Sales charges and account fees, if applicable, are not reflected in the bar chart. If those charges were included, returns would be less than those shown.

Performance Availability Website Address [Text]

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americancentury.com

Bar Chart [Heading]

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Calendar Year Total Returns

Bar Chart Closing [Text Block]

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Highest Performance Quarter (3Q 2007): 0.82%

Lowest Performance Quarter (3Q 2009): 0.00%

As of September 30, 2013, the most recent calendar quarter end, the fund's Investor Class year-to-date return was 0.01%.

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2013

Highest Quarterly Return, Label

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Highest Performance Quarter

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

0.82%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2009

Performance Table Heading

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Average Annual Total Returns For the calendar year ended December 31, 2012

Prospectus [Line Items]

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Management Fee

rr_ManagementFeesOverAssets

0.49%

Other Expenses

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0.01%

1 year

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51

5 years

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280

Annual Return 2003

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0.60%

Annual Return 2005

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1.94%

Annual Return 2007

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3.22%

Annual Return 2009

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0.18%

Annual Return 2011

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0.01%

1 year

rr_AverageAnnualReturnYear01

0.01%

10 years

rr_AverageAnnualReturnYear10

1.15%

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549
__________________
FORM N-1A
__________________
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933		☒

Pre-Effective Amendment No.		☐

Post-Effective Amendment No. 54		☒

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940		☒

Amendment No. 58		☒
(Check appropriate box or boxes.)
__________________
American Century California Tax-Free and Municipal Funds (Exact Name of Registrant as Specified in Charter)
__________________
4500 MAIN STREET, KANSAS CITY, MISSOURI 64111 (Address of Principal Executive Offices) (Zip Code)
REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (816) 531-5575
CHARLES A. ETHERINGTON 4500 MAIN STREET, KANSAS CITY, MISSOURI 64111 (Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box)
☑	immediately upon filing pursuant to paragraph (b)
☐	on (date) pursuant to paragraph (b)
☐	60 days after filing pursuant to paragraph (a)(1)
☐	on (date) pursuant to paragraph (a)(1)
☐	75 days after filing pursuant to paragraph (a)(2)
☐	on (date) pursuant to paragraph (a)(2) of rule 485.

If appropriate, check the following box:
☐	this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES	TITLE	DATE

* _________________________________ Jonathan S. Thomas	President and Trustee	January 16, 2014

* _________________________________ C. Jean Wade	Vice President, Treasurer and Chief Financial Officer	January 16, 2014

* _________________________________ Tanya S. Beder	Trustee	January 16, 2014

* _________________________________ Jeremy I. Bulow	Trustee	January 16, 2014

* _________________________________ Ronald J. Gilson	Chairman of the Board and Trustee	January 16, 2014

* _________________________________ Frederick L.A. Grauer	Trustee	January 16, 2014

* _________________________________ Peter F. Pervere	Trustee	January 16, 2014

* _________________________________ Myron S. Scholes	Trustee	January 16, 2014

*By:	/s/ Elizabeth L. Richards
	Elizabeth L. Richards
	Attorney in Fact
	Pursuant to Power of Attorney, dated December 18, 2012 (filed electronically as Exhibit q1 to Post-Effective Amendment No. 51 to the Registration Statement of the Registrant on December 28, 2012, File No. 002-82734, and incorporated herein by reference).

	Secretary’s Certificate, dated December 18, 2012 (filed electronically as Exhibit q2 to Post-Effective Amendment No. 51 to the Registration Statement of the Registrant on December 28, 2012, File No. 002-82734, and incorporated herein by reference).

EXHIBIT NUMBER	DESCRIPTION OF DOCUMENT

Exhibit – 101.INS	XBRL Instance Document

Exhibit – 101.SCH	XBRL Taxonomy Extension Schema Document

Exhibit – 101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

Exhibit – 101.LAB	XBRL Taxonomy Extension Label Linkbase Document

Exhibit – 101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document