485BPOS

Securities Act of 1933 Registration No. 002-73133

Investment Company Act of 1940 Registration No. 811-03221

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 [X]

[ ] Pre-Effective Amendment No.  ______

[X] Post-Effective Amendment No.  140

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 [X]

[X] Amendment No.  140

Fidelity Charles Street Trust

 (Exact Name of Registrant as Specified in Charter)

245 Summer Street, Boston, Massachusetts 02210

(Address of Principal Executive Offices)(Zip Code)

Registrant’s Telephone Number: 617-563-7000

Cynthia Lo Bessette, Secretary

245 Summer Street

Boston, Massachusetts 02210

(Name and Address of Agent for Service)

It is proposed that this filing will become effective immediately upon filing pursuant to paragraph (b) of Rule 485.

EXHIBIT INDEX

Exhibit	Exhibit No.
XBRL Instance Document	EX-101.INS
XBRL Taxonomy Extension Schema Document	EX-101.SCH
XBRL Taxonomy Extension Calculation Linkbase Document	EX-101.CAL
XBRL Taxonomy Extension Definition Linkbase Document	EX-101.DEF
XBRL Taxonomy Extension Labels Linkbase Document	EX-101.LAB
XBRL Taxonomy Extension Presentation Linkbase Document	EX-101.PRE

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for the effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment No. 140 to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Boston, and Commonwealth of Massachusetts, on the 17th day of December 2019.

Fidelity Charles Street Trust
By	/s/Laura M. Del Prato
	Laura M. Del Prato, President

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

(Signature)		(Title)	(Date)
/s/Laura M. Del Prato		President and Treasurer	December 17, 2019
Laura M. Del Prato		(Principal Executive Officer)
/s/ John J. Burke III		Chief Financial Officer	December 17, 2019
John J. Burke III		(Principal Financial Officer)
/s/Abigail P. Johnson	†	Trustee	December 17, 2019
Abigail P. Johnson
/s/Elizabeth S. Acton	*	Trustee	December 17, 2019
Elizabeth S. Acton
/s/Ann E. Dunwoody	*	Trustee	December 17, 2019
Ann E. Dunwoody
/s/John Engler	*	Trustee	December 17, 2019
John Engler
/s/Robert F. Gartland	*	Trustee	December 17, 2019
Robert F. Gartland
/s/Arthur E. Johnson	*	Trustee	December 17, 2019
Arthur E. Johnson
/s/Michael E. Kenneally	*	Trustee	December 17, 2019
Michael E. Kenneally
/s/Marie L. Knowles	*	Trustee	December 17, 2019
Marie L. Knowles
/s/Mark A. Murray	*	Trustee	December 17, 2019
Mark A. Murray
/s/Jennifer Toolin McAuliffe	*	Trustee	December 17, 2019
Jennifer Toolin McAuliffe

†	By:	/s/ Kevin M. Meagher
		Kevin M. Meagher, pursuant to a power of attorney dated September 30, 2018 and filed herewith.
*	By:	/s/Megan C. Johnson
		Megan C. Johnson, pursuant to a power of attorney dated January 1, 2019 and filed herewith.

POWER OF ATTORNEY

We, the undersigned Directors or Trustees, as the case may be, of the following investment companies:

Fidelity Aberdeen Street Trust Fidelity Advisor Series II Fidelity Advisor Series IV Fidelity Boylston Street Trust Fidelity California Municipal Trust Fidelity California Municipal Trust II Fidelity Central Investment Portfolios II LLC Fidelity Charles Street Trust Fidelity Colchester Street Trust Fidelity Court Street Trust Fidelity Court Street Trust II Fidelity Garrison Street Trust Fidelity Hereford Street Trust Fidelity Income Fund Fidelity Massachusetts Municipal Trust Fidelity Merrimack Street Trust
Fidelity Money Market Trust Fidelity Municipal Trust Fidelity Municipal Trust II Fidelity Newbury Street Trust Fidelity New York Municipal Trust Fidelity New York Municipal Trust II Fidelity Oxford Street Trust Fidelity Oxford Street Trust II Fidelity Phillips Street Trust Fidelity Revere Street Trust Fidelity Salem Street Trust Fidelity School Street Trust Fidelity Union Street Trust Fidelity Union Street Trust II Variable Insurance Products Fund V

in addition to any other Fidelity Fund for which the undersigned individuals serve as Directors or Trustees (collectively, the “Funds”), hereby revoke all previous powers of attorney we have given to sign and otherwise act in our names and behalf in matters involving any investment company for which FMR or an affiliate acts as investment adviser and hereby constitute and appoint Thomas C. Bogle, John V. O’Hanlon, Robert W. Helm, Megan C. Johnson, and Anthony H. Zacharski, each of them singly, our true and lawful attorneys-in-fact, with full power of substitution, and with full power to each of them, to sign for us and in our names in the appropriate capacities, all Registration Statements of the Funds on Form N-1A, or any successors thereto, any and all subsequent Amendments, Pre-Effective Amendments, or Post-Effective Amendments to said Registration Statements or any successors thereto, and any supplements or other instruments in connection therewith, and generally to do all such things in our names and behalf in connection therewith as said attorneys-in-fact deem necessary or appropriate, to comply with the provisions of the Securities Act of 1933 and the Investment Company Act of 1940, and all related requirements of the Securities and Exchange Commission.  We hereby ratify and confirm all that said attorneys-in-fact or their substitutes may do or cause to be done by virtue hereof.  This power of attorney is effective for all documents filed on or after January 1, 2019.

WITNESS our hands on this first day of January 2019.

/s/Elizabeth S. Acton	/s/Michael E. Kenneally
Elizabeth S. Acton	Michael E. Kenneally
/s/Ann E. Dunwoody	/s/Marie L. Knowles
Ann E. Dunwoody	Marie L. Knowles
/s/John Engler	/s/Jennifer Toolin McAuliffe
John Engler	Jennifer Toolin McAuliffe
/s/Robert F. Gartland	/s/Mark A. Murray
Robert F. Gartland	Mark A. Murray
/s/Arthur E. Johnson
Arthur E. Johnson

POWER OF ATTORNEY

I, the undersigned Trustee of the following investment companies:

Fidelity Aberdeen Street Trust Fidelity Advisor Series II Fidelity Advisor Series IV Fidelity Boylston Street Trust Fidelity California Municipal Trust Fidelity California Municipal Trust II Fidelity Central Investment Portfolios II LLC Fidelity Charles Street Trust Fidelity Colchester Street Trust Fidelity Court Street Trust Fidelity Court Street Trust II Fidelity Garrison Street Trust Fidelity Hereford Street Trust Fidelity Income Fund Fidelity Massachusetts Municipal Trust
Fidelity Merrimack Street Trust Fidelity Money Market Trust Fidelity Municipal Trust Fidelity Municipal Trust II Fidelity Newbury Street Trust Fidelity New York Municipal Trust Fidelity New York Municipal Trust II Fidelity Oxford Street Trust Fidelity Oxford Street Trust II Fidelity Phillips Street Trust Fidelity Revere Street Trust Fidelity Salem Street Trust Fidelity School Street Trust Fidelity Union Street Trust Fidelity Union Street Trust II Variable Insurance Products Fund V

in addition to any other Fidelity Fund for which the undersigned individual serves as Trustee (collectively, the “Funds”), hereby constitute and appoint Kevin M. Meagher, my true and lawful attorney-in-fact, with full power of substitution, and with full power to sign for me and in my name in the appropriate capacity, all Registration Statements of the Funds on Form N-1A, or any successors thereto, any and all subsequent Amendments, Pre-Effective Amendments, or Post-Effective Amendments to said Registration Statements or any successors thereto, and any supplements or other instruments in connection therewith, and generally to do all such things in my name and behalf in connection therewith as said attorney-in-fact deems necessary or appropriate, to comply with the provisions of the Securities Act of 1933 and the Investment Company Act of 1940, and all related requirements of the Securities and Exchange Commission.  I hereby ratify and confirm all that said attorney-in-fact or his substitutes may do or cause to be done by virtue hereof.  

This Power of Attorney shall remain in full force and effect only for such time as Kevin M. Meagher shall continue to be an officer of Fidelity Management & Research Company, provided that, notwithstanding the foregoing, this Power of Attorney may be revoked at any time by the undersigned in writing.

This Power of Attorney has been executed as of September 30, 2018.

/s/Abigail P. Johnson

Abigail P. Johnson

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 50%</b>/Fidelity Advisor Asset Manager® 50% A, M, C, I, Z</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks high total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 37% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

37.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

<font style="FONT-FAMILY: Times New Roman" size="3">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus.</font>

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 50% of assets in stocks, 40% of assets in bonds, and 10% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (30%-70%), bond class (20%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">institutional.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.</font>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	15.11%	June 30, 2009
Lowest Quarter Return	-8.77%	September 30, 2011
Year-to-Date Return	12.07%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

5.75%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.49%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.20%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.97%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 668

3 years

rr_ExpenseExampleYear03

866

5 years

rr_ExpenseExampleYear05

1,080

10 years

rr_ExpenseExampleYear10

1,696

1 Year

rr_ExpenseExampleNoRedemptionYear01

668

3 Years

rr_ExpenseExampleNoRedemptionYear03

866

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,080

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,696

2009

rr_AnnualReturn2009

30.57%

2010

rr_AnnualReturn2010

13.25%

2011

rr_AnnualReturn2011

(1.02%)

2012

rr_AnnualReturn2012

11.05%

2013

rr_AnnualReturn2013

13.58%

2014

rr_AnnualReturn2014

5.18%

2015

rr_AnnualReturn2015

(0.75%)

2016

rr_AnnualReturn2016

6.07%

2017

rr_AnnualReturn2017

13.76%

2018

rr_AnnualReturn2018

(5.69%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

12.07%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.11%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(8.77%)

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class M

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

3.50%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.49%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other expenses

rr_OtherExpensesOverAssets

0.19%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.21%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 469

3 years

rr_ExpenseExampleYear03

721

5 years

rr_ExpenseExampleYear05

992

10 years

rr_ExpenseExampleYear10

1,765

1 Year

rr_ExpenseExampleNoRedemptionYear01

469

3 Years

rr_ExpenseExampleNoRedemptionYear03

721

5 Years

rr_ExpenseExampleNoRedemptionYear05

992

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,765

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management fee

rr_ManagementFeesOverAssets

0.49%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.20%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.72%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

On Class C shares redeemed less than one year after purchase.

1 year

rr_ExpenseExampleYear01

$ 275

3 years

rr_ExpenseExampleYear03

542

5 years

rr_ExpenseExampleYear05

933

10 years

rr_ExpenseExampleYear10

2,030

1 Year

rr_ExpenseExampleNoRedemptionYear01

175

3 Years

rr_ExpenseExampleNoRedemptionYear03

542

5 Years

rr_ExpenseExampleNoRedemptionYear05

933

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,030

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.49%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.17%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.69%

^[2]

1 year

rr_ExpenseExampleYear01

$ 70

3 years

rr_ExpenseExampleYear03

221

5 years

rr_ExpenseExampleYear05

384

10 years

rr_ExpenseExampleYear10

859

1 Year

rr_ExpenseExampleNoRedemptionYear01

70

3 Years

rr_ExpenseExampleNoRedemptionYear03

221

5 Years

rr_ExpenseExampleNoRedemptionYear05

384

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 859

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.49%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.06%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.58%

^[2]

1 year

rr_ExpenseExampleYear01

$ 59

3 years

rr_ExpenseExampleYear03

186

5 years

rr_ExpenseExampleYear05

324

10 years

rr_ExpenseExampleYear10

726

1 Year

rr_ExpenseExampleNoRedemptionYear01

59

3 Years

rr_ExpenseExampleNoRedemptionYear03

186

5 Years

rr_ExpenseExampleNoRedemptionYear05

324

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 726

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

<font style="FONT-FAMILY: Times New Roman" size="3">Performance history will be available for Class Z after Class Z has been in operation for one calendar year.</font>

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Return Before Taxes | Fidelity Advisor Asset Manager 50%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class A - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(11.11%)

Past 5 years

rr_AverageAnnualReturnYear05

2.29%

Past 10 years

rr_AverageAnnualReturnYear10

7.53%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Return Before Taxes | Fidelity Advisor Asset Manager 50%: Class M

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class M - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(9.17%)

Past 5 years

rr_AverageAnnualReturnYear05

2.51%

Past 10 years

rr_AverageAnnualReturnYear10

7.52%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Return Before Taxes | Fidelity Advisor Asset Manager 50%: Class C

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class C - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.28%)

Past 5 years

rr_AverageAnnualReturnYear05

2.72%

Past 10 years

rr_AverageAnnualReturnYear10

7.35%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Return Before Taxes | Fidelity Advisor Asset Manager 50%: Class I

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class I - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(5.42%)

Past 5 years

rr_AverageAnnualReturnYear05

3.77%

Past 10 years

rr_AverageAnnualReturnYear10

8.47%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | After Taxes on Distributions | Fidelity Advisor Asset Manager 50%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(12.25%)

Past 5 years

rr_AverageAnnualReturnYear05

0.88%

Past 10 years

rr_AverageAnnualReturnYear10

6.40%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | After Taxes on Distributions and Sales | Fidelity Advisor Asset Manager 50%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(6.00%)

Past 5 years

rr_AverageAnnualReturnYear05

1.44%

Past 10 years

rr_AverageAnnualReturnYear10

5.81%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Asset Manager 50% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(3.59%)

Past 5 years

rr_AverageAnnualReturnYear05

4.19%

Past 10 years

rr_AverageAnnualReturnYear10

7.22%

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[3] On Class C shares redeemed less than one year after purchase.

XML

Total

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 30%</b>/Fidelity Advisor Asset Manager® 30% A, M, C, I, Z</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Shareholder Fees {- Fidelity Asset Manager 30%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 30%	Fidelity Advisor Asset Manager 30%: Class A		Fidelity Advisor Asset Manager 30%: Class M		Fidelity Advisor Asset Manager 30%: Class C		Fidelity Advisor Asset Manager 30%: Class I	Fidelity Advisor Asset Manager 30%: Class Z
Maximum sales charge (load) on purchases (as a % of offering price)	5.75%		3.50%		none		none	none
Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)	none	[1]	none	[1]	1.00%	[2]	none	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 30%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 30%		Fidelity Advisor Asset Manager 30%: Class A	Fidelity Advisor Asset Manager 30%: Class M	Fidelity Advisor Asset Manager 30%: Class C	Fidelity Advisor Asset Manager 30%: Class I	Fidelity Advisor Asset Manager 30%: Class Z
Management fee		0.40%	0.40%	0.40%	0.40%	0.40%
Distribution and/or Service (12b-1) fees		0.25%	0.50%	1.00%	none	none
Other expenses		0.17%	0.19%	0.20%	0.19%	0.10%
Acquired fund fees and expenses		0.02%	0.02%	0.02%	0.02%	0.02%
Total annual operating expenses	[1]	0.84%	1.11%	1.62%	0.61%	0.52%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 30%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 30% - USD ($)	Fidelity Advisor Asset Manager 30%: Class A	Fidelity Advisor Asset Manager 30%: Class M	Fidelity Advisor Asset Manager 30%: Class C	Fidelity Advisor Asset Manager 30%: Class I	Fidelity Advisor Asset Manager 30%: Class Z
1 year	$ 656	$ 459	$ 265	$ 62	$ 53
3 years	828	691	511	195	167
5 years	1,014	940	881	340	291
10 years	$ 1,553	$ 1,654	$ 1,922	$ 762	$ 653

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Expense Example, No Redemption {- Fidelity Asset Manager 30%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 30% - USD ($)	Fidelity Advisor Asset Manager 30%: Class A	Fidelity Advisor Asset Manager 30%: Class M	Fidelity Advisor Asset Manager 30%: Class C	Fidelity Advisor Asset Manager 30%: Class I	Fidelity Advisor Asset Manager 30%: Class Z
1 Year	$ 656	$ 459	$ 165	$ 62	$ 53
3 Years	828	691	511	195	167
5 Years	1,014	940	881	340	291
10 Years	$ 1,553	$ 1,654	$ 1,922	$ 762	$ 653

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 34% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 30% of assets in stocks, 50% of assets in bonds, and 20% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-40%), bond class (40%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	10.97%	June 30, 2009
Lowest Quarter Return	-4.64%	September 30, 2011
Year-to-Date Return	9.48%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 30%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 30%	Past 1 year	Past 5 years	Past 10 years
Fidelity Advisor Asset Manager 30%: Class A | Return Before Taxes	(8.80%)	1.69%	5.78%
Fidelity Advisor Asset Manager 30%: Class A | After Taxes on Distributions	(9.74%)	0.70%	4.77%
Fidelity Advisor Asset Manager 30%: Class A | After Taxes on Distributions and Sales	(4.89%)	1.01%	4.31%
Fidelity Advisor Asset Manager 30%: Class M | Return Before Taxes	(6.85%)	1.88%	5.75%
Fidelity Advisor Asset Manager 30%: Class C | Return Before Taxes	(4.91%)	2.11%	5.59%
Fidelity Advisor Asset Manager 30%: Class I | Return Before Taxes	(2.99%)	3.14%	6.66%
Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)	0.01%	2.52%	3.48%
Fidelity Asset Manager 30% Composite Index℠(reflects no deduction for fees or expenses)	(1.85%)	3.29%	5.31%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class A

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class M

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class C

On Class C shares redeemed less than one year after purchase.

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] On Class C shares redeemed less than one year after purchase.

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 40%</b>/Fidelity Advisor Asset Manager® 40% A, M, C, I, Z</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks current income as well as total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments. The fund also considers the potential for capital appreciation.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Shareholder Fees {- Fidelity Asset Manager 40%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 40%	Fidelity Advisor Asset Manager 40%: Class A		Fidelity Advisor Asset Manager 40%: Class M		Fidelity Advisor Asset Manager 40%: Class C		Fidelity Advisor Asset Manager 40%: Class I	Fidelity Advisor Asset Manager 40%: Class Z
Maximum sales charge (load) on purchases (as a % of offering price)	5.75%		3.50%		none		none	none
Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)	none	[1]	none	[1]	1.00%	[2]	none	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 40%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 40%		Fidelity Advisor Asset Manager 40%: Class A	Fidelity Advisor Asset Manager 40%: Class M	Fidelity Advisor Asset Manager 40%: Class C	Fidelity Advisor Asset Manager 40%: Class I	Fidelity Advisor Asset Manager 40%: Class Z
Management fee		0.40%	0.40%	0.40%	0.40%	0.40%
Distribution and/or Service (12b-1) fees		0.25%	0.50%	1.00%	none	none
Other expenses		0.18%	0.19%	0.20%	0.16%	0.10%
Acquired fund fees and expenses		0.02%	0.02%	0.02%	0.02%	0.02%
Total annual operating expenses	[1]	0.85%	1.11%	1.62%	0.58%	0.52%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 40%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 40% - USD ($)	Fidelity Advisor Asset Manager 40%: Class A	Fidelity Advisor Asset Manager 40%: Class M	Fidelity Advisor Asset Manager 40%: Class C	Fidelity Advisor Asset Manager 40%: Class I	Fidelity Advisor Asset Manager 40%: Class Z
1 year	$ 657	$ 459	$ 265	$ 59	$ 53
3 years	831	691	511	186	167
5 years	1,019	940	881	324	291
10 years	$ 1,564	$ 1,654	$ 1,922	$ 726	$ 653

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Expense Example, No Redemption {- Fidelity Asset Manager 40%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 40% - USD ($)	Fidelity Advisor Asset Manager 40%: Class A	Fidelity Advisor Asset Manager 40%: Class M	Fidelity Advisor Asset Manager 40%: Class C	Fidelity Advisor Asset Manager 40%: Class I	Fidelity Advisor Asset Manager 40%: Class Z
1 Year	$ 657	$ 459	$ 165	$ 59	$ 53
3 Years	831	691	511	186	167
5 Years	1,019	940	881	324	291
10 Years	$ 1,564	$ 1,654	$ 1,922	$ 726	$ 653

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 36% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 40% of assets in stocks, 45% of assets in bonds, and 15% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-60%), bond class (30%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	12.78%	June 30, 2009
Lowest Quarter Return	-6.70%	September 30, 2011
Year-to-Date Return	10.92%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 40%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 40%	Past 1 year	Past 5 years	Past 10 years
Fidelity Advisor Asset Manager 40%: Class A | Return Before Taxes	(9.96%)	2.04%	6.60%
Fidelity Advisor Asset Manager 40%: Class A | After Taxes on Distributions	(11.00%)	1.06%	5.64%
Fidelity Advisor Asset Manager 40%: Class A | After Taxes on Distributions and Sales	(5.45%)	1.30%	5.03%
Fidelity Advisor Asset Manager 40%: Class M | Return Before Taxes	(7.99%)	2.24%	6.57%
Fidelity Advisor Asset Manager 40%: Class C | Return Before Taxes	(6.02%)	2.47%	6.42%
Fidelity Advisor Asset Manager 40%: Class I | Return Before Taxes	(4.10%)	3.53%	7.52%
Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)	0.01%	2.52%	3.48%
Fidelity Asset Manager 40% Composite Index℠(reflects no deduction for fees or expenses)	(2.71%)	3.74%	6.29%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class A

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class M

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class C

On Class C shares redeemed less than one year after purchase.

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] On Class C shares redeemed less than one year after purchase.

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 50%</b>/Fidelity Asset Manager® 50%</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks high total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

Shareholder Fees {- Fidelity Asset Manager 50%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 50% USD ($)
(fees paid directly from your investment)	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 50%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 50% Fidelity Asset Manager 50%
Management fee	0.49%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.14%
Acquired fund fees and expenses	0.03%
Total annual operating expenses	0.66%	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 50%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 50% Fidelity Asset Manager 50% USD ($)
1 year	$ 67
3 years	211
5 years	368
10 years	$ 822

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 37% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 50% of assets in stocks, 40% of assets in bonds, and 10% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (30%-70%), bond class (20%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	15.23%	June 30, 2009
Lowest Quarter Return	-8.73%	September 30, 2011
Year-to-Date Return	12.30%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 50%} - 09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 - Fidelity Asset Manager 50%	Past 1 year	Past 5 years	Past 10 years
Fidelity Asset Manager 50% | Return Before Taxes	(5.37%)	3.82%	8.50%
Fidelity Asset Manager 50% | After Taxes on Distributions	(6.69%)	2.27%	7.24%
Fidelity Asset Manager 50% | After Taxes on Distributions and Sales	(2.55%)	2.58%	6.57%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 50% Composite Index℠(reflects no deduction for fees or expenses)	(3.59%)	4.19%	7.22%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 50%</b>/Fidelity Asset Manager® 50%</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks high total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 37% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

37.00%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 50% of assets in stocks, 40% of assets in bonds, and 10% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (30%-70%), bond class (20%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">www.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	15.23%	June 30, 2009
Lowest Quarter Return	-8.73%	September 30, 2011
Year-to-Date Return	12.30%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50% | Fidelity Asset Manager 50%

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.49%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.14%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.66%

^[1]

1 year

rr_ExpenseExampleYear01

$ 67

3 years

rr_ExpenseExampleYear03

211

5 years

rr_ExpenseExampleYear05

368

10 years

rr_ExpenseExampleYear10

$ 822

2009

rr_AnnualReturn2009

30.94%

2010

rr_AnnualReturn2010

13.51%

2011

rr_AnnualReturn2011

(0.65%)

2012

rr_AnnualReturn2012

11.37%

2013

rr_AnnualReturn2013

13.96%

2014

rr_AnnualReturn2014

5.48%

2015

rr_AnnualReturn2015

(0.44%)

2016

rr_AnnualReturn2016

6.43%

2017

rr_AnnualReturn2017

14.06%

2018

rr_AnnualReturn2018

(5.37%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

12.30%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.23%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(8.73%)

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50% | Return Before Taxes | Fidelity Asset Manager 50%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(5.37%)

Past 5 years

rr_AverageAnnualReturnYear05

3.82%

Past 10 years

rr_AverageAnnualReturnYear10

8.50%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50% | After Taxes on Distributions | Fidelity Asset Manager 50%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(6.69%)

Past 5 years

rr_AverageAnnualReturnYear05

2.27%

Past 10 years

rr_AverageAnnualReturnYear10

7.24%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50% | After Taxes on Distributions and Sales | Fidelity Asset Manager 50%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 50%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(2.55%)

Past 5 years

rr_AverageAnnualReturnYear05

2.58%

Past 10 years

rr_AverageAnnualReturnYear10

6.57%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 50% | Fidelity Asset Manager 50% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(3.59%)

Past 5 years

rr_AverageAnnualReturnYear05

4.19%

Past 10 years

rr_AverageAnnualReturnYear10

7.22%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 30%</b>/Fidelity Asset Manager® 30%</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 34% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

34.00%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 30% of assets in stocks, 50% of assets in bonds, and 20% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-40%), bond class (40%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">www.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	10.91%	June 30, 2009
Lowest Quarter Return	-4.55%	September 30, 2011
Year-to-Date Return	9.80%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30% | Fidelity Asset Manager 30%

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.13%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.55%

^[1]

1 year

rr_ExpenseExampleYear01

$ 56

3 years

rr_ExpenseExampleYear03

176

5 years

rr_ExpenseExampleYear05

307

10 years

rr_ExpenseExampleYear10

$ 689

2009

rr_AnnualReturn2009

23.62%

2010

rr_AnnualReturn2010

10.89%

2011

rr_AnnualReturn2011

1.69%

2012

rr_AnnualReturn2012

8.69%

2013

rr_AnnualReturn2013

7.94%

2014

rr_AnnualReturn2014

4.83%

2015

rr_AnnualReturn2015

(0.29%)

2016

rr_AnnualReturn2016

5.50%

2017

rr_AnnualReturn2017

9.43%

2018

rr_AnnualReturn2018

(2.91%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

9.80%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

10.91%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(4.55%)

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30% | Return Before Taxes | Fidelity Asset Manager 30%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(2.91%)

Past 5 years

rr_AverageAnnualReturnYear05

3.22%

Past 10 years

rr_AverageAnnualReturnYear10

6.72%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30% | After Taxes on Distributions | Fidelity Asset Manager 30%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(4.05%)

Past 5 years

rr_AverageAnnualReturnYear05

2.07%

Past 10 years

rr_AverageAnnualReturnYear10

5.58%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30% | After Taxes on Distributions and Sales | Fidelity Asset Manager 30%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(1.38%)

Past 5 years

rr_AverageAnnualReturnYear05

2.13%

Past 10 years

rr_AverageAnnualReturnYear10

5.03%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30% | Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

0.01%

Past 5 years

rr_AverageAnnualReturnYear05

2.52%

Past 10 years

rr_AverageAnnualReturnYear10

3.48%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30% | Fidelity Asset Manager 30% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(1.85%)

Past 5 years

rr_AverageAnnualReturnYear05

3.29%

Past 10 years

rr_AverageAnnualReturnYear10

5.31%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 20%</b>/Fidelity Asset Manager® 20%</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

41.00%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 20% of assets in stocks, 50% of assets in bonds, and 30% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (10%-30%), bond class (40%-60%), and short-term/money market class (10%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">www.fidelity.com </font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	8.80%	June 30, 2009
Lowest Quarter Return	-2.70%	December 31, 2018
Year-to-Date Return	8.17%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20% | Fidelity Asset Manager 20%

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.11%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.53%

^[1]

1 year

rr_ExpenseExampleYear01

$ 54

3 years

rr_ExpenseExampleYear03

170

5 years

rr_ExpenseExampleYear05

296

10 years

rr_ExpenseExampleYear10

$ 665

2009

rr_AnnualReturn2009

19.50%

2010

rr_AnnualReturn2010

8.92%

2011

rr_AnnualReturn2011

2.63%

2012

rr_AnnualReturn2012

6.83%

2013

rr_AnnualReturn2013

5.16%

2014

rr_AnnualReturn2014

4.11%

2015

rr_AnnualReturn2015

(0.30%)

2016

rr_AnnualReturn2016

4.70%

2017

rr_AnnualReturn2017

6.98%

2018

rr_AnnualReturn2018

(1.64%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

8.17%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

8.80%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2018

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(2.70%)

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20% | Return Before Taxes | Fidelity Asset Manager 20%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(1.64%)

Past 5 years

rr_AverageAnnualReturnYear05

2.72%

Past 10 years

rr_AverageAnnualReturnYear10

5.55%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20% | After Taxes on Distributions | Fidelity Asset Manager 20%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(2.92%)

Past 5 years

rr_AverageAnnualReturnYear05

1.46%

Past 10 years

rr_AverageAnnualReturnYear10

4.43%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20% | After Taxes on Distributions and Sales | Fidelity Asset Manager 20%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(0.65%)

Past 5 years

rr_AverageAnnualReturnYear05

1.69%

Past 10 years

rr_AverageAnnualReturnYear10

4.06%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20% | Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

0.01%

Past 5 years

rr_AverageAnnualReturnYear05

2.52%

Past 10 years

rr_AverageAnnualReturnYear10

3.48%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20% | Fidelity Asset Manager 20% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(0.90%)

Past 5 years

rr_AverageAnnualReturnYear05

2.73%

Past 10 years

rr_AverageAnnualReturnYear10

4.19%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 50%</b>/Fidelity Advisor Asset Manager® 50% A, M, C, I, Z</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks high total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Shareholder Fees {- Fidelity Asset Manager 50%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 50%	Fidelity Advisor Asset Manager 50%: Class A		Fidelity Advisor Asset Manager 50%: Class M		Fidelity Advisor Asset Manager 50%: Class C		Fidelity Advisor Asset Manager 50%: Class I	Fidelity Advisor Asset Manager 50%: Class Z
Maximum sales charge (load) on purchases (as a % of offering price)	5.75%		3.50%		none		none	none
Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)	none	[1]	none	[1]	1.00%	[2]	none	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 50%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 50%		Fidelity Advisor Asset Manager 50%: Class A	Fidelity Advisor Asset Manager 50%: Class M	Fidelity Advisor Asset Manager 50%: Class C	Fidelity Advisor Asset Manager 50%: Class I	Fidelity Advisor Asset Manager 50%: Class Z
Management fee		0.49%	0.49%	0.49%	0.49%	0.49%
Distribution and/or Service (12b-1) fees		0.25%	0.50%	1.00%	none	none
Other expenses		0.20%	0.19%	0.20%	0.17%	0.06%
Acquired fund fees and expenses		0.03%	0.03%	0.03%	0.03%	0.03%
Total annual operating expenses	[1]	0.97%	1.21%	1.72%	0.69%	0.58%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 50%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 50% - USD ($)	Fidelity Advisor Asset Manager 50%: Class A	Fidelity Advisor Asset Manager 50%: Class M	Fidelity Advisor Asset Manager 50%: Class C	Fidelity Advisor Asset Manager 50%: Class I	Fidelity Advisor Asset Manager 50%: Class Z
1 year	$ 668	$ 469	$ 275	$ 70	$ 59
3 years	866	721	542	221	186
5 years	1,080	992	933	384	324
10 years	$ 1,696	$ 1,765	$ 2,030	$ 859	$ 726

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Expense Example, No Redemption {- Fidelity Asset Manager 50%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 50% - USD ($)	Fidelity Advisor Asset Manager 50%: Class A	Fidelity Advisor Asset Manager 50%: Class M	Fidelity Advisor Asset Manager 50%: Class C	Fidelity Advisor Asset Manager 50%: Class I	Fidelity Advisor Asset Manager 50%: Class Z
1 Year	$ 668	$ 469	$ 175	$ 70	$ 59
3 Years	866	721	542	221	186
5 Years	1,080	992	933	384	324
10 Years	$ 1,696	$ 1,765	$ 2,030	$ 859	$ 726

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 37% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 50% of assets in stocks, 40% of assets in bonds, and 10% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (30%-70%), bond class (20%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	15.11%	June 30, 2009
Lowest Quarter Return	-8.77%	September 30, 2011
Year-to-Date Return	12.07%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 50%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 50%	Past 1 year	Past 5 years	Past 10 years
Fidelity Advisor Asset Manager 50%: Class A | Return Before Taxes	(11.11%)	2.29%	7.53%
Fidelity Advisor Asset Manager 50%: Class A | After Taxes on Distributions	(12.25%)	0.88%	6.40%
Fidelity Advisor Asset Manager 50%: Class A | After Taxes on Distributions and Sales	(6.00%)	1.44%	5.81%
Fidelity Advisor Asset Manager 50%: Class M | Return Before Taxes	(9.17%)	2.51%	7.52%
Fidelity Advisor Asset Manager 50%: Class C | Return Before Taxes	(7.28%)	2.72%	7.35%
Fidelity Advisor Asset Manager 50%: Class I | Return Before Taxes	(5.42%)	3.77%	8.47%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 50% Composite Index℠(reflects no deduction for fees or expenses)	(3.59%)	4.19%	7.22%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class A

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class M

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 50% | Fidelity Advisor Asset Manager 50%: Class C

On Class C shares redeemed less than one year after purchase.

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] On Class C shares redeemed less than one year after purchase.

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 85%</b>/Fidelity Asset Manager® 85%</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

Shareholder Fees {- Fidelity Asset Manager 85%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 85% USD ($)
(fees paid directly from your investment)	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 85%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 85% Fidelity Asset Manager 85%
Management fee	0.54%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.17%
Acquired fund fees and expenses	0.03%
Total annual operating expenses	0.74%	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 85%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 85% Fidelity Asset Manager 85% USD ($)
1 year	$ 76
3 years	237
5 years	411
10 years	$ 918

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 47% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets between two main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), and the bond and short-term/money market class (fixed-income securities of all types and maturities, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities).

• Maintaining a neutral mix over time of 85% of assets in stocks and 15% of assets in bonds and short-term and money market instruments.

• Adjusting allocation between asset classes gradually within the following ranges: stock class (60%-100%) and bond and short-term/money market class (0%-40%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	20.85%	June 30, 2009
Lowest Quarter Return	-16.11%	September 30, 2011
Year-to-Date Return	16.21%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 85%} - 09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 - Fidelity Asset Manager 85%	Past 1 year	Past 5 years	Past 10 years
Fidelity Asset Manager 85% | Return Before Taxes	(9.22%)	4.64%	10.70%
Fidelity Asset Manager 85% | After Taxes on Distributions	(10.41%)	3.29%	9.77%
Fidelity Asset Manager 85% | After Taxes on Distributions and Sales	(4.67%)	3.36%	8.69%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 85% Composite Index℠(reflects no deduction for fees or expenses)	(6.59%)	5.53%	10.23%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 70%</b>/Fidelity Asset Manager® 70%</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

41.00%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 70% of assets in stocks, 25% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (50%-100%), bond class (0%-50%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">www.fidelity.com </font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	18.44%	June 30, 2009
Lowest Quarter Return	-13.12%	September 30, 2011
Year-to-Date Return	14.50%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70% | Fidelity Asset Manager 70%

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.15%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.72%

^[1]

1 year

rr_ExpenseExampleYear01

$ 74

3 years

rr_ExpenseExampleYear03

230

5 years

rr_ExpenseExampleYear05

401

10 years

rr_ExpenseExampleYear10

$ 894

2009

rr_AnnualReturn2009

35.66%

2010

rr_AnnualReturn2010

15.78%

2011

rr_AnnualReturn2011

(3.75%)

2012

rr_AnnualReturn2012

14.12%

2013

rr_AnnualReturn2013

20.12%

2014

rr_AnnualReturn2014

5.61%

2015

rr_AnnualReturn2015

(0.55%)

2016

rr_AnnualReturn2016

7.08%

2017

rr_AnnualReturn2017

18.70%

2018

rr_AnnualReturn2018

(7.66%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

14.50%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.44%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(13.12%)

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70% | Return Before Taxes | Fidelity Asset Manager 70%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.66%)

Past 5 years

rr_AverageAnnualReturnYear05

4.27%

Past 10 years

rr_AverageAnnualReturnYear10

9.83%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70% | After Taxes on Distributions | Fidelity Asset Manager 70%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(9.06%)

Past 5 years

rr_AverageAnnualReturnYear05

2.82%

Past 10 years

rr_AverageAnnualReturnYear10

8.85%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70% | After Taxes on Distributions and Sales | Fidelity Asset Manager 70%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(3.70%)

Past 5 years

rr_AverageAnnualReturnYear05

3.05%

Past 10 years

rr_AverageAnnualReturnYear10

7.89%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70% | Fidelity Asset Manager 70% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(5.30%)

Past 5 years

rr_AverageAnnualReturnYear05

4.94%

Past 10 years

rr_AverageAnnualReturnYear10

8.91%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 30%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 30%</b>/Fidelity Asset Manager® 30%</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

Shareholder Fees {- Fidelity Asset Manager 30%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 30% USD ($)
(fees paid directly from your investment)	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 30%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 30% Fidelity Asset Manager 30%
Management fee	0.40%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.13%
Acquired fund fees and expenses	0.02%
Total annual operating expenses	0.55%	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 30%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 30% Fidelity Asset Manager 30% USD ($)
1 year	$ 56
3 years	176
5 years	307
10 years	$ 689

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 34% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 30% of assets in stocks, 50% of assets in bonds, and 20% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-40%), bond class (40%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	10.91%	June 30, 2009
Lowest Quarter Return	-4.55%	September 30, 2011
Year-to-Date Return	9.80%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 30%} - 09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 - Fidelity Asset Manager 30%	Past 1 year	Past 5 years	Past 10 years
Fidelity Asset Manager 30% | Return Before Taxes	(2.91%)	3.22%	6.72%
Fidelity Asset Manager 30% | After Taxes on Distributions	(4.05%)	2.07%	5.58%
Fidelity Asset Manager 30% | After Taxes on Distributions and Sales	(1.38%)	2.13%	5.03%
Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)	0.01%	2.52%	3.48%
Fidelity Asset Manager 30% Composite Index℠(reflects no deduction for fees or expenses)	(1.85%)	3.29%	5.31%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 70%</b>/Fidelity Advisor Asset Manager® 70% A, M, C, I, Z</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Shareholder Fees {- Fidelity Asset Manager 70%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 70%	Fidelity Advisor Asset Manager 70%: Class A		Fidelity Advisor Asset Manager 70%: Class M		Fidelity Advisor Asset Manager 70%: Class C		Fidelity Advisor Asset Manager 70%: Class I	Fidelity Advisor Asset Manager 70%: Class Z
Maximum sales charge (load) on purchases (as a % of offering price)	5.75%		3.50%		none		none	none
Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)	none	[1]	none	[1]	1.00%	[2]	none	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 70%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 70%		Fidelity Advisor Asset Manager 70%: Class A	Fidelity Advisor Asset Manager 70%: Class M	Fidelity Advisor Asset Manager 70%: Class C	Fidelity Advisor Asset Manager 70%: Class I	Fidelity Advisor Asset Manager 70%: Class Z
Management fee		0.54%	0.54%	0.54%	0.54%	0.54%
Distribution and/or Service (12b-1) fees		0.25%	0.50%	1.00%	none	none
Other expenses		0.21%	0.20%	0.21%	0.18%	0.08%
Acquired fund fees and expenses		0.03%	0.03%	0.03%	0.03%	0.03%
Total annual operating expenses	[1]	1.03%	1.27%	1.78%	0.75%	0.65%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 70%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 70% - USD ($)	Fidelity Advisor Asset Manager 70%: Class A	Fidelity Advisor Asset Manager 70%: Class M	Fidelity Advisor Asset Manager 70%: Class C	Fidelity Advisor Asset Manager 70%: Class I	Fidelity Advisor Asset Manager 70%: Class Z
1 year	$ 674	$ 475	$ 281	$ 77	$ 66
3 years	884	739	560	240	208
5 years	1,111	1,023	964	417	362
10 years	$ 1,762	$ 1,830	$ 2,095	$ 930	$ 810

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Expense Example, No Redemption {- Fidelity Asset Manager 70%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 70% - USD ($)	Fidelity Advisor Asset Manager 70%: Class A	Fidelity Advisor Asset Manager 70%: Class M	Fidelity Advisor Asset Manager 70%: Class C	Fidelity Advisor Asset Manager 70%: Class I	Fidelity Advisor Asset Manager 70%: Class Z
1 Year	$ 674	$ 475	$ 181	$ 77	$ 66
3 Years	884	739	560	240	208
5 Years	1,111	1,023	964	417	362
10 Years	$ 1,762	$ 1,830	$ 2,095	$ 930	$ 810

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 70% of assets in stocks, 25% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (50%-100%), bond class (0%-50%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	18.36%	June 30, 2009
Lowest Quarter Return	-13.21%	September 30, 2011
Year-to-Date Return	14.25%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 70%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 70%	Past 1 year	Past 5 years	Past 10 years
Fidelity Advisor Asset Manager 70%: Class A | Return Before Taxes	(13.27%)	2.72%	8.84%
Fidelity Advisor Asset Manager 70%: Class A | After Taxes on Distributions	(14.47%)	1.43%	8.00%
Fidelity Advisor Asset Manager 70%: Class A | After Taxes on Distributions and Sales	(7.06%)	1.91%	7.11%
Fidelity Advisor Asset Manager 70%: Class M | Return Before Taxes	(11.44%)	2.95%	8.82%
Fidelity Advisor Asset Manager 70%: Class C | Return Before Taxes	(9.51%)	3.18%	8.68%
Fidelity Advisor Asset Manager 70%: Class I | Return Before Taxes	(7.70%)	4.24%	9.80%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 70% Composite Index℠(reflects no deduction for fees or expenses)	(5.30%)	4.94%	8.91%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class A

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class M

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class C

On Class C shares redeemed less than one year after purchase.

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] On Class C shares redeemed less than one year after purchase.

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Sep. 30, 2019
Registrant Name	dei_EntityRegistrantName	FIDELITY CHARLES STREET TRUST
Central Index Key	dei_EntityCentralIndexKey	0000354046
Investment Company Type	dei_EntityInvCompanyType	N-1A
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Nov. 27, 2019
Document Effective Date	dei_DocumentEffectiveDate	Nov. 29, 2019
Prospectus Date	rr_ProspectusDate	Nov. 29, 2019

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 20%</b>/Fidelity Advisor Asset Manager® 20% A, M, C, I, Z</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

41.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

<font style="FONT-FAMILY: Times New Roman" size="3">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus.</font>

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 20% of assets in stocks, 50% of assets in bonds, and 30% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (10%-30%), bond class (40%-60%), and short-term/money market class (10%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">institutional.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.</font>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	8.73%	June 30, 2009
Lowest Quarter Return	-2.82%	December 31, 2018
Year-to-Date Return	7.89%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

5.75%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.18%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.85%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 657

3 years

rr_ExpenseExampleYear03

831

5 years

rr_ExpenseExampleYear05

1,019

10 years

rr_ExpenseExampleYear10

1,564

1 Year

rr_ExpenseExampleNoRedemptionYear01

657

3 Years

rr_ExpenseExampleNoRedemptionYear03

831

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,019

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,564

2009

rr_AnnualReturn2009

18.98%

2010

rr_AnnualReturn2010

8.72%

2011

rr_AnnualReturn2011

2.24%

2012

rr_AnnualReturn2012

6.53%

2013

rr_AnnualReturn2013

4.92%

2014

rr_AnnualReturn2014

3.71%

2015

rr_AnnualReturn2015

(0.60%)

2016

rr_AnnualReturn2016

4.38%

2017

rr_AnnualReturn2017

6.66%

2018

rr_AnnualReturn2018

(1.96%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

7.89%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

8.73%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2018

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(2.82%)

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class M

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

3.50%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other expenses

rr_OtherExpensesOverAssets

0.18%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

1.10%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 458

3 years

rr_ExpenseExampleYear03

687

5 years

rr_ExpenseExampleYear05

935

10 years

rr_ExpenseExampleYear10

1,643

1 Year

rr_ExpenseExampleNoRedemptionYear01

458

3 Years

rr_ExpenseExampleNoRedemptionYear03

687

5 Years

rr_ExpenseExampleNoRedemptionYear05

935

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,643

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.19%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

1.61%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

On Class C shares redeemed less than one year after purchase.

1 year

rr_ExpenseExampleYear01

$ 264

3 years

rr_ExpenseExampleYear03

508

5 years

rr_ExpenseExampleYear05

876

10 years

rr_ExpenseExampleYear10

1,911

1 Year

rr_ExpenseExampleNoRedemptionYear01

164

3 Years

rr_ExpenseExampleNoRedemptionYear03

508

5 Years

rr_ExpenseExampleNoRedemptionYear05

876

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,911

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.16%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.58%

^[2]

1 year

rr_ExpenseExampleYear01

$ 59

3 years

rr_ExpenseExampleYear03

186

5 years

rr_ExpenseExampleYear05

324

10 years

rr_ExpenseExampleYear10

726

1 Year

rr_ExpenseExampleNoRedemptionYear01

59

3 Years

rr_ExpenseExampleNoRedemptionYear03

186

5 Years

rr_ExpenseExampleNoRedemptionYear05

324

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 726

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.08%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.50%

^[2]

1 year

rr_ExpenseExampleYear01

$ 51

3 years

rr_ExpenseExampleYear03

160

5 years

rr_ExpenseExampleYear05

280

10 years

rr_ExpenseExampleYear10

628

1 Year

rr_ExpenseExampleNoRedemptionYear01

51

3 Years

rr_ExpenseExampleNoRedemptionYear03

160

5 Years

rr_ExpenseExampleNoRedemptionYear05

280

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 628

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

<font style="FONT-FAMILY: Times New Roman" size="3">Performance history will be available for Class Z after Class Z has been in operation for one calendar year.</font>

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Return Before Taxes | Fidelity Advisor Asset Manager 20%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class A - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.60%)

Past 5 years

rr_AverageAnnualReturnYear05

1.18%

Past 10 years

rr_AverageAnnualReturnYear10

4.60%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Return Before Taxes | Fidelity Advisor Asset Manager 20%: Class M

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class M - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(5.65%)

Past 5 years

rr_AverageAnnualReturnYear05

1.40%

Past 10 years

rr_AverageAnnualReturnYear10

4.58%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Return Before Taxes | Fidelity Advisor Asset Manager 20%: Class C

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class C - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(3.67%)

Past 5 years

rr_AverageAnnualReturnYear05

1.61%

Past 10 years

rr_AverageAnnualReturnYear10

4.42%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Return Before Taxes | Fidelity Advisor Asset Manager 20%: Class I

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class I - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(1.68%)

Past 5 years

rr_AverageAnnualReturnYear05

2.66%

Past 10 years

rr_AverageAnnualReturnYear10

5.51%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | After Taxes on Distributions | Fidelity Advisor Asset Manager 20%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(8.68%)

Past 5 years

rr_AverageAnnualReturnYear05

0.08%

Past 10 years

rr_AverageAnnualReturnYear10

3.61%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | After Taxes on Distributions and Sales | Fidelity Advisor Asset Manager 20%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 20%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(4.20%)

Past 5 years

rr_AverageAnnualReturnYear05

0.58%

Past 10 years

rr_AverageAnnualReturnYear10

3.34%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

0.01%

Past 5 years

rr_AverageAnnualReturnYear05

2.52%

Past 10 years

rr_AverageAnnualReturnYear10

3.48%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Asset Manager 20% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(0.90%)

Past 5 years

rr_AverageAnnualReturnYear05

2.73%

Past 10 years

rr_AverageAnnualReturnYear10

4.19%

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[3] On Class C shares redeemed less than one year after purchase.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 40%</b>/Fidelity Asset Manager® 40%</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks current income as well as total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments. The fund also considers the potential for capital appreciation.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 36% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

36.00%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 40% of assets in stocks, 45% of assets in bonds, and 15% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-60%), bond class (30%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">www.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	12.87%	June 30, 2009
Lowest Quarter Return	-6.63%	September 30, 2011
Year-to-Date Return	11.08%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40% | Fidelity Asset Manager 40%

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.12%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.54%

^[1]

1 year

rr_ExpenseExampleYear01

$ 55

3 years

rr_ExpenseExampleYear03

173

5 years

rr_ExpenseExampleYear05

302

10 years

rr_ExpenseExampleYear10

$ 677

2009

rr_AnnualReturn2009

25.95%

2010

rr_AnnualReturn2010

12.14%

2011

rr_AnnualReturn2011

0.49%

2012

rr_AnnualReturn2012

10.23%

2013

rr_AnnualReturn2013

11.09%

2014

rr_AnnualReturn2014

5.13%

2015

rr_AnnualReturn2015

(0.29%)

2016

rr_AnnualReturn2016

6.00%

2017

rr_AnnualReturn2017

11.78%

2018

rr_AnnualReturn2018

(4.06%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

11.08%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.87%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(6.63%)

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40% | Return Before Taxes | Fidelity Asset Manager 40%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(4.06%)

Past 5 years

rr_AverageAnnualReturnYear05

3.57%

Past 10 years

rr_AverageAnnualReturnYear10

7.55%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40% | After Taxes on Distributions | Fidelity Asset Manager 40%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(5.30%)

Past 5 years

rr_AverageAnnualReturnYear05

2.45%

Past 10 years

rr_AverageAnnualReturnYear10

6.46%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40% | After Taxes on Distributions and Sales | Fidelity Asset Manager 40%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(1.93%)

Past 5 years

rr_AverageAnnualReturnYear05

2.42%

Past 10 years

rr_AverageAnnualReturnYear10

5.77%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40% | Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

0.01%

Past 5 years

rr_AverageAnnualReturnYear05

2.52%

Past 10 years

rr_AverageAnnualReturnYear10

3.48%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40% | Fidelity Asset Manager 40% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(2.71%)

Past 5 years

rr_AverageAnnualReturnYear05

3.74%

Past 10 years

rr_AverageAnnualReturnYear10

6.29%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 85%</b>/Fidelity Advisor Asset Manager® 85% A, M, C, I, Z</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 47% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

47.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

<font style="FONT-FAMILY: Times New Roman" size="3">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus.</font>

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets between two main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), and the bond and short-term/money market class (fixed-income securities of all types and maturities, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities).

• Maintaining a neutral mix over time of 85% of assets in stocks and 15% of assets in bonds and short-term and money market instruments.

• Adjusting allocation between asset classes gradually within the following ranges: stock class (60%-100%) and bond and short-term/money market class (0%-40%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">institutional.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.</font>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	20.68%	June 30, 2009
Lowest Quarter Return	-16.22%	September 30, 2011
Year-to-Date Return	15.92%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

5.75%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.22%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.04%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 675

3 years

rr_ExpenseExampleYear03

887

5 years

rr_ExpenseExampleYear05

1,116

10 years

rr_ExpenseExampleYear10

1,773

1 Year

rr_ExpenseExampleNoRedemptionYear01

675

3 Years

rr_ExpenseExampleNoRedemptionYear03

887

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,116

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,773

2009

rr_AnnualReturn2009

38.42%

2010

rr_AnnualReturn2010

16.20%

2011

rr_AnnualReturn2011

(6.31%)

2012

rr_AnnualReturn2012

15.57%

2013

rr_AnnualReturn2013

24.87%

2014

rr_AnnualReturn2014

5.58%

2015

rr_AnnualReturn2015

(0.95%)

2016

rr_AnnualReturn2016

7.13%

2017

rr_AnnualReturn2017

21.83%

2018

rr_AnnualReturn2018

(9.47%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

15.92%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.68%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(16.22%)

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class M

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

3.50%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other expenses

rr_OtherExpensesOverAssets

0.23%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.30%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 478

3 years

rr_ExpenseExampleYear03

748

5 years

rr_ExpenseExampleYear05

1,038

10 years

rr_ExpenseExampleYear10

1,863

1 Year

rr_ExpenseExampleNoRedemptionYear01

478

3 Years

rr_ExpenseExampleNoRedemptionYear03

748

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,038

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,863

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.23%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.80%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

On Class C shares redeemed less than one year after purchase.

1 year

rr_ExpenseExampleYear01

$ 283

3 years

rr_ExpenseExampleYear03

566

5 years

rr_ExpenseExampleYear05

975

10 years

rr_ExpenseExampleYear10

2,116

1 Year

rr_ExpenseExampleNoRedemptionYear01

183

3 Years

rr_ExpenseExampleNoRedemptionYear03

566

5 Years

rr_ExpenseExampleNoRedemptionYear05

975

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,116

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.20%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.77%

^[2]

1 year

rr_ExpenseExampleYear01

$ 79

3 years

rr_ExpenseExampleYear03

246

5 years

rr_ExpenseExampleYear05

428

10 years

rr_ExpenseExampleYear10

954

1 Year

rr_ExpenseExampleNoRedemptionYear01

79

3 Years

rr_ExpenseExampleNoRedemptionYear03

246

5 Years

rr_ExpenseExampleNoRedemptionYear05

428

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 954

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.08%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.65%

^[2]

1 year

rr_ExpenseExampleYear01

$ 66

3 years

rr_ExpenseExampleYear03

208

5 years

rr_ExpenseExampleYear05

362

10 years

rr_ExpenseExampleYear10

810

1 Year

rr_ExpenseExampleNoRedemptionYear01

66

3 Years

rr_ExpenseExampleNoRedemptionYear03

208

5 Years

rr_ExpenseExampleNoRedemptionYear05

362

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 810

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

<font style="FONT-FAMILY: Times New Roman" size="3">Performance history will be available for Class Z after Class Z has been in operation for one calendar year.</font>

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Return Before Taxes | Fidelity Advisor Asset Manager 85%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class A - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(14.68%)

Past 5 years

rr_AverageAnnualReturnYear05

3.10%

Past 10 years

rr_AverageAnnualReturnYear10

9.74%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Return Before Taxes | Fidelity Advisor Asset Manager 85%: Class M

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class M - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(12.93%)

Past 5 years

rr_AverageAnnualReturnYear05

3.28%

Past 10 years

rr_AverageAnnualReturnYear10

9.68%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Return Before Taxes | Fidelity Advisor Asset Manager 85%: Class C

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class C - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(11.01%)

Past 5 years

rr_AverageAnnualReturnYear05

3.54%

Past 10 years

rr_AverageAnnualReturnYear10

9.55%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Return Before Taxes | Fidelity Advisor Asset Manager 85%: Class I

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class I - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(9.29%)

Past 5 years

rr_AverageAnnualReturnYear05

4.62%

Past 10 years

rr_AverageAnnualReturnYear10

10.70%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | After Taxes on Distributions | Fidelity Advisor Asset Manager 85%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(15.69%)

Past 5 years

rr_AverageAnnualReturnYear05

1.88%

Past 10 years

rr_AverageAnnualReturnYear10

8.92%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | After Taxes on Distributions and Sales | Fidelity Advisor Asset Manager 85%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.94%)

Past 5 years

rr_AverageAnnualReturnYear05

2.21%

Past 10 years

rr_AverageAnnualReturnYear10

7.91%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Asset Manager 85% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(6.59%)

Past 5 years

rr_AverageAnnualReturnYear05

5.53%

Past 10 years

rr_AverageAnnualReturnYear10

10.23%

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[3] On Class C shares redeemed less than one year after purchase.

XML

Total

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 70%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 70%</b>/Fidelity Asset Manager® 70%</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

Shareholder Fees {- Fidelity Asset Manager 70%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 70% USD ($)
(fees paid directly from your investment)	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 70%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 70% Fidelity Asset Manager 70%
Management fee	0.54%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.15%
Acquired fund fees and expenses	0.03%
Total annual operating expenses	0.72%	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 70%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 70% Fidelity Asset Manager 70% USD ($)
1 year	$ 74
3 years	230
5 years	401
10 years	$ 894

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 70% of assets in stocks, 25% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (50%-100%), bond class (0%-50%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	18.44%	June 30, 2009
Lowest Quarter Return	-13.12%	September 30, 2011
Year-to-Date Return	14.50%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 70%} - 09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 - Fidelity Asset Manager 70%	Past 1 year	Past 5 years	Past 10 years
Fidelity Asset Manager 70% | Return Before Taxes	(7.66%)	4.27%	9.83%
Fidelity Asset Manager 70% | After Taxes on Distributions	(9.06%)	2.82%	8.85%
Fidelity Asset Manager 70% | After Taxes on Distributions and Sales	(3.70%)	3.05%	7.89%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 70% Composite Index℠(reflects no deduction for fees or expenses)	(5.30%)	4.94%	8.91%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FIDELITY CHARLES STREET TRUST
Prospectus Date	rr_ProspectusDate	Nov. 29, 2019
Document Creation Date	dei_DocumentCreationDate	Nov. 27, 2019

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 40%</b>/Fidelity Advisor Asset Manager® 40% A, M, C, I, Z</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks current income as well as total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments. The fund also considers the potential for capital appreciation.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 36% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

36.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

<font style="FONT-FAMILY: Times New Roman" size="3">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus.</font>

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 40% of assets in stocks, 45% of assets in bonds, and 15% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-60%), bond class (30%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">institutional.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.</font>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	12.78%	June 30, 2009
Lowest Quarter Return	-6.70%	September 30, 2011
Year-to-Date Return	10.92%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

5.75%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.18%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.85%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 657

3 years

rr_ExpenseExampleYear03

831

5 years

rr_ExpenseExampleYear05

1,019

10 years

rr_ExpenseExampleYear10

1,564

1 Year

rr_ExpenseExampleNoRedemptionYear01

657

3 Years

rr_ExpenseExampleNoRedemptionYear03

831

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,019

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,564

2009

rr_AnnualReturn2009

25.56%

2010

rr_AnnualReturn2010

11.92%

2011

rr_AnnualReturn2011

0.24%

2012

rr_AnnualReturn2012

9.88%

2013

rr_AnnualReturn2013

10.65%

2014

rr_AnnualReturn2014

4.93%

2015

rr_AnnualReturn2015

(0.67%)

2016

rr_AnnualReturn2016

5.78%

2017

rr_AnnualReturn2017

11.42%

2018

rr_AnnualReturn2018

(4.46%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

10.92%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.78%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(6.70%)

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class M

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

3.50%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other expenses

rr_OtherExpensesOverAssets

0.19%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

1.11%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 459

3 years

rr_ExpenseExampleYear03

691

5 years

rr_ExpenseExampleYear05

940

10 years

rr_ExpenseExampleYear10

1,654

1 Year

rr_ExpenseExampleNoRedemptionYear01

459

3 Years

rr_ExpenseExampleNoRedemptionYear03

691

5 Years

rr_ExpenseExampleNoRedemptionYear05

940

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,654

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.20%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

1.62%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

On Class C shares redeemed less than one year after purchase.

1 year

rr_ExpenseExampleYear01

$ 265

3 years

rr_ExpenseExampleYear03

511

5 years

rr_ExpenseExampleYear05

881

10 years

rr_ExpenseExampleYear10

1,922

1 Year

rr_ExpenseExampleNoRedemptionYear01

165

3 Years

rr_ExpenseExampleNoRedemptionYear03

511

5 Years

rr_ExpenseExampleNoRedemptionYear05

881

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,922

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.16%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.58%

^[2]

1 year

rr_ExpenseExampleYear01

$ 59

3 years

rr_ExpenseExampleYear03

186

5 years

rr_ExpenseExampleYear05

324

10 years

rr_ExpenseExampleYear10

726

1 Year

rr_ExpenseExampleNoRedemptionYear01

59

3 Years

rr_ExpenseExampleNoRedemptionYear03

186

5 Years

rr_ExpenseExampleNoRedemptionYear05

324

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 726

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Advisor Asset Manager 40%: Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.10%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.52%

^[2]

1 year

rr_ExpenseExampleYear01

$ 53

3 years

rr_ExpenseExampleYear03

167

5 years

rr_ExpenseExampleYear05

291

10 years

rr_ExpenseExampleYear10

653

1 Year

rr_ExpenseExampleNoRedemptionYear01

53

3 Years

rr_ExpenseExampleNoRedemptionYear03

167

5 Years

rr_ExpenseExampleNoRedemptionYear05

291

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 653

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

<font style="FONT-FAMILY: Times New Roman" size="3">Performance history will be available for Class Z after Class Z has been in operation for one calendar year.</font>

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Return Before Taxes | Fidelity Advisor Asset Manager 40%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class A - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(9.96%)

Past 5 years

rr_AverageAnnualReturnYear05

2.04%

Past 10 years

rr_AverageAnnualReturnYear10

6.60%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Return Before Taxes | Fidelity Advisor Asset Manager 40%: Class M

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class M - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.99%)

Past 5 years

rr_AverageAnnualReturnYear05

2.24%

Past 10 years

rr_AverageAnnualReturnYear10

6.57%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Return Before Taxes | Fidelity Advisor Asset Manager 40%: Class C

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class C - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(6.02%)

Past 5 years

rr_AverageAnnualReturnYear05

2.47%

Past 10 years

rr_AverageAnnualReturnYear10

6.42%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Return Before Taxes | Fidelity Advisor Asset Manager 40%: Class I

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class I - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(4.10%)

Past 5 years

rr_AverageAnnualReturnYear05

3.53%

Past 10 years

rr_AverageAnnualReturnYear10

7.52%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | After Taxes on Distributions | Fidelity Advisor Asset Manager 40%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(11.00%)

Past 5 years

rr_AverageAnnualReturnYear05

1.06%

Past 10 years

rr_AverageAnnualReturnYear10

5.64%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | After Taxes on Distributions and Sales | Fidelity Advisor Asset Manager 40%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 40%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(5.45%)

Past 5 years

rr_AverageAnnualReturnYear05

1.30%

Past 10 years

rr_AverageAnnualReturnYear10

5.03%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

0.01%

Past 5 years

rr_AverageAnnualReturnYear05

2.52%

Past 10 years

rr_AverageAnnualReturnYear10

3.48%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 40% | Fidelity Asset Manager 40% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(2.71%)

Past 5 years

rr_AverageAnnualReturnYear05

3.74%

Past 10 years

rr_AverageAnnualReturnYear10

6.29%

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[3] On Class C shares redeemed less than one year after purchase.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 30%</b>/Fidelity Advisor Asset Manager® 30% A, M, C, I, Z</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 34% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

34.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

<font style="FONT-FAMILY: Times New Roman" size="3">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus.</font>

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

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• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 30% of assets in stocks, 50% of assets in bonds, and 20% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-40%), bond class (40%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

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<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

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• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

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<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

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The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">institutional.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

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<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Narrative [Text Block]

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The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.</font>

Bar Chart Closing [Text Block]

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During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	10.97%	June 30, 2009
Lowest Quarter Return	-4.64%	September 30, 2011
Year-to-Date Return	9.48%	September 30, 2019

Performance Table Heading

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<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</font>

Performance Table Explanation after Tax Higher

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<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

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Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

5.75%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.17%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.84%

^[2]

Expenses Deferred Charges [Text Block]

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Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 656

3 years

rr_ExpenseExampleYear03

828

5 years

rr_ExpenseExampleYear05

1,014

10 years

rr_ExpenseExampleYear10

1,553

1 Year

rr_ExpenseExampleNoRedemptionYear01

656

3 Years

rr_ExpenseExampleNoRedemptionYear03

828

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,014

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,553

2009

rr_AnnualReturn2009

23.20%

2010

rr_AnnualReturn2010

10.62%

2011

rr_AnnualReturn2011

1.48%

2012

rr_AnnualReturn2012

8.24%

2013

rr_AnnualReturn2013

7.72%

2014

rr_AnnualReturn2014

4.47%

2015

rr_AnnualReturn2015

(0.60%)

2016

rr_AnnualReturn2016

5.17%

2017

rr_AnnualReturn2017

9.18%

2018

rr_AnnualReturn2018

(3.24%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

9.48%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

10.97%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(4.64%)

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class M

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

3.50%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other expenses

rr_OtherExpensesOverAssets

0.19%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

1.11%

^[2]

Expenses Deferred Charges [Text Block]

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Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 459

3 years

rr_ExpenseExampleYear03

691

5 years

rr_ExpenseExampleYear05

940

10 years

rr_ExpenseExampleYear10

1,654

1 Year

rr_ExpenseExampleNoRedemptionYear01

459

3 Years

rr_ExpenseExampleNoRedemptionYear03

691

5 Years

rr_ExpenseExampleNoRedemptionYear05

940

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,654

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.20%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

1.62%

^[2]

Expenses Deferred Charges [Text Block]

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On Class C shares redeemed less than one year after purchase.

1 year

rr_ExpenseExampleYear01

$ 265

3 years

rr_ExpenseExampleYear03

511

5 years

rr_ExpenseExampleYear05

881

10 years

rr_ExpenseExampleYear10

1,922

1 Year

rr_ExpenseExampleNoRedemptionYear01

165

3 Years

rr_ExpenseExampleNoRedemptionYear03

511

5 Years

rr_ExpenseExampleNoRedemptionYear05

881

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,922

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.19%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.61%

^[2]

1 year

rr_ExpenseExampleYear01

$ 62

3 years

rr_ExpenseExampleYear03

195

5 years

rr_ExpenseExampleYear05

340

10 years

rr_ExpenseExampleYear10

762

1 Year

rr_ExpenseExampleNoRedemptionYear01

62

3 Years

rr_ExpenseExampleNoRedemptionYear03

195

5 Years

rr_ExpenseExampleNoRedemptionYear05

340

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 762

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Advisor Asset Manager 30%: Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.40%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.10%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total annual operating expenses

rr_ExpensesOverAssets

0.52%

^[2]

1 year

rr_ExpenseExampleYear01

$ 53

3 years

rr_ExpenseExampleYear03

167

5 years

rr_ExpenseExampleYear05

291

10 years

rr_ExpenseExampleYear10

653

1 Year

rr_ExpenseExampleNoRedemptionYear01

53

3 Years

rr_ExpenseExampleNoRedemptionYear03

167

5 Years

rr_ExpenseExampleNoRedemptionYear05

291

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 653

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

<font style="FONT-FAMILY: Times New Roman" size="3">Performance history will be available for Class Z after Class Z has been in operation for one calendar year.</font>

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Return Before Taxes | Fidelity Advisor Asset Manager 30%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class A - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(8.80%)

Past 5 years

rr_AverageAnnualReturnYear05

1.69%

Past 10 years

rr_AverageAnnualReturnYear10

5.78%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Return Before Taxes | Fidelity Advisor Asset Manager 30%: Class M

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class M - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(6.85%)

Past 5 years

rr_AverageAnnualReturnYear05

1.88%

Past 10 years

rr_AverageAnnualReturnYear10

5.75%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Return Before Taxes | Fidelity Advisor Asset Manager 30%: Class C

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class C - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(4.91%)

Past 5 years

rr_AverageAnnualReturnYear05

2.11%

Past 10 years

rr_AverageAnnualReturnYear10

5.59%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Return Before Taxes | Fidelity Advisor Asset Manager 30%: Class I

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class I - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(2.99%)

Past 5 years

rr_AverageAnnualReturnYear05

3.14%

Past 10 years

rr_AverageAnnualReturnYear10

6.66%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | After Taxes on Distributions | Fidelity Advisor Asset Manager 30%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(9.74%)

Past 5 years

rr_AverageAnnualReturnYear05

0.70%

Past 10 years

rr_AverageAnnualReturnYear10

4.77%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | After Taxes on Distributions and Sales | Fidelity Advisor Asset Manager 30%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 30%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(4.89%)

Past 5 years

rr_AverageAnnualReturnYear05

1.01%

Past 10 years

rr_AverageAnnualReturnYear10

4.31%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

0.01%

Past 5 years

rr_AverageAnnualReturnYear05

2.52%

Past 10 years

rr_AverageAnnualReturnYear10

3.48%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 30% | Fidelity Asset Manager 30% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(1.85%)

Past 5 years

rr_AverageAnnualReturnYear05

3.29%

Past 10 years

rr_AverageAnnualReturnYear10

5.31%

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[3] On Class C shares redeemed less than one year after purchase.

XML

Total

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 60%</b>/Fidelity Advisor Asset Manager® 60% A, M, C, I, Z</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks high total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Shareholder Fees {- Fidelity Asset Manager 60%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 60%	Fidelity Advisor Asset Manager 60%: Class A		Fidelity Advisor Asset Manager 60%: Class M		Fidelity Advisor Asset Manager 60%: Class C		Fidelity Advisor Asset Manager 60%: Class I	Fidelity Advisor Asset Manager 60%: Class Z
Maximum sales charge (load) on purchases (as a % of offering price)	5.75%		3.50%		none		none	none
Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)	none	[1]	none	[1]	1.00%	[2]	none	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 60%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 60%		Fidelity Advisor Asset Manager 60%: Class A	Fidelity Advisor Asset Manager 60%: Class M	Fidelity Advisor Asset Manager 60%: Class C	Fidelity Advisor Asset Manager 60%: Class I	Fidelity Advisor Asset Manager 60%: Class Z
Management fee		0.54%	0.54%	0.54%	0.54%	0.54%
Distribution and/or Service (12b-1) fees		0.25%	0.50%	1.00%	none	none
Other expenses		0.23%	0.24%	0.27%	0.21%	0.09%
Acquired fund fees and expenses		0.03%	0.03%	0.03%	0.03%	0.03%
Total annual operating expenses	[1]	1.05%	1.31%	1.84%	0.78%	0.66%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 60%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 60% - USD ($)	Fidelity Advisor Asset Manager 60%: Class A	Fidelity Advisor Asset Manager 60%: Class M	Fidelity Advisor Asset Manager 60%: Class C	Fidelity Advisor Asset Manager 60%: Class I	Fidelity Advisor Asset Manager 60%: Class Z
1 year	$ 676	$ 479	$ 287	$ 80	$ 67
3 years	890	751	579	249	211
5 years	1,121	1,043	995	433	368
10 years	$ 1,784	$ 1,874	$ 2,159	$ 966	$ 822

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Expense Example, No Redemption {- Fidelity Asset Manager 60%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 60% - USD ($)	Fidelity Advisor Asset Manager 60%: Class A	Fidelity Advisor Asset Manager 60%: Class M	Fidelity Advisor Asset Manager 60%: Class C	Fidelity Advisor Asset Manager 60%: Class I	Fidelity Advisor Asset Manager 60%: Class Z
1 Year	$ 676	$ 479	$ 187	$ 80	$ 67
3 Years	890	751	579	249	211
5 Years	1,121	1,043	995	433	368
10 Years	$ 1,784	$ 1,874	$ 2,159	$ 966	$ 822

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 39% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 60% of assets in stocks, 35% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (40%-90%), bond class (10%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	16.69%	June 30, 2009
Lowest Quarter Return	-10.89%	September 30, 2011
Year-to-Date Return	13.21%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 60%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 60%	Past 1 year	Past 5 years	Past 10 years
Fidelity Advisor Asset Manager 60%: Class A | Return Before Taxes	(12.24%)	2.52%	8.12%
Fidelity Advisor Asset Manager 60%: Class A | After Taxes on Distributions	(13.15%)	1.51%	7.20%
Fidelity Advisor Asset Manager 60%: Class A | After Taxes on Distributions and Sales	(6.73%)	1.73%	6.39%
Fidelity Advisor Asset Manager 60%: Class M | Return Before Taxes	(10.37%)	2.74%	8.12%
Fidelity Advisor Asset Manager 60%: Class C | Return Before Taxes	(8.44%)	2.96%	7.96%
Fidelity Advisor Asset Manager 60%: Class I | Return Before Taxes	(6.64%)	4.03%	9.05%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 60% Composite Index℠(reflects no deduction for fees or expenses)	(4.48%)	4.62%	8.18%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class A

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class M

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class C

On Class C shares redeemed less than one year after purchase.

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] On Class C shares redeemed less than one year after purchase.

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 60%</b>/Fidelity Asset Manager® 60%</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks high total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

Shareholder Fees {- Fidelity Asset Manager 60%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 60% USD ($)
(fees paid directly from your investment)	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 60%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 60% Fidelity Asset Manager 60%
Management fee	0.54%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.16%
Acquired fund fees and expenses	0.03%
Total annual operating expenses	0.73%	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 60%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 60% Fidelity Asset Manager 60% USD ($)
1 year	$ 75
3 years	233
5 years	406
10 years	$ 906

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 39% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 60% of assets in stocks, 35% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (40%-90%), bond class (10%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	16.85%	June 30, 2009
Lowest Quarter Return	-10.84%	September 30, 2011
Year-to-Date Return	13.54%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 60%} - 09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 - Fidelity Asset Manager 60%	Past 1 year	Past 5 years	Past 10 years
Fidelity Asset Manager 60% | Return Before Taxes	(6.61%)	4.07%	9.09%
Fidelity Asset Manager 60% | After Taxes on Distributions	(7.68%)	2.91%	8.05%
Fidelity Asset Manager 60% | After Taxes on Distributions and Sales	(3.36%)	2.88%	7.15%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 60% Composite Index℠(reflects no deduction for fees or expenses)	(4.48%)	4.62%	8.18%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

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Total

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 40%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 40%</b>/Fidelity Asset Manager® 40%</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks current income as well as total return with reduced risk over the long term by allocating its assets among stocks, bonds, and short-term instruments. The fund also considers the potential for capital appreciation.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

Shareholder Fees {- Fidelity Asset Manager 40%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 40% USD ($)
(fees paid directly from your investment)	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 40%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 40% Fidelity Asset Manager 40%
Management fee	0.40%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.12%
Acquired fund fees and expenses	0.02%
Total annual operating expenses	0.54%	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 40%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 40% Fidelity Asset Manager 40% USD ($)
1 year	$ 55
3 years	173
5 years	302
10 years	$ 677

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 36% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 40% of assets in stocks, 45% of assets in bonds, and 15% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (20%-60%), bond class (30%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	12.87%	June 30, 2009
Lowest Quarter Return	-6.63%	September 30, 2011
Year-to-Date Return	11.08%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 40%} - 09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 - Fidelity Asset Manager 40%	Past 1 year	Past 5 years	Past 10 years
Fidelity Asset Manager 40% | Return Before Taxes	(4.06%)	3.57%	7.55%
Fidelity Asset Manager 40% | After Taxes on Distributions	(5.30%)	2.45%	6.46%
Fidelity Asset Manager 40% | After Taxes on Distributions and Sales	(1.93%)	2.42%	5.77%
Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)	0.01%	2.52%	3.48%
Fidelity Asset Manager 40% Composite Index℠(reflects no deduction for fees or expenses)	(2.71%)	3.74%	6.29%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 20%</b>/Fidelity Advisor Asset Manager® 20% A, M, C, I, Z</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Shareholder Fees {- Fidelity Asset Manager 20%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 20%	Fidelity Advisor Asset Manager 20%: Class A		Fidelity Advisor Asset Manager 20%: Class M		Fidelity Advisor Asset Manager 20%: Class C		Fidelity Advisor Asset Manager 20%: Class I	Fidelity Advisor Asset Manager 20%: Class Z
Maximum sales charge (load) on purchases (as a % of offering price)	5.75%		3.50%		none		none	none
Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)	none	[1]	none	[1]	1.00%	[2]	none	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 20%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 20%		Fidelity Advisor Asset Manager 20%: Class A	Fidelity Advisor Asset Manager 20%: Class M	Fidelity Advisor Asset Manager 20%: Class C	Fidelity Advisor Asset Manager 20%: Class I	Fidelity Advisor Asset Manager 20%: Class Z
Management fee		0.40%	0.40%	0.40%	0.40%	0.40%
Distribution and/or Service (12b-1) fees		0.25%	0.50%	1.00%	none	none
Other expenses		0.18%	0.18%	0.19%	0.16%	0.08%
Acquired fund fees and expenses		0.02%	0.02%	0.02%	0.02%	0.02%
Total annual operating expenses	[1]	0.85%	1.10%	1.61%	0.58%	0.50%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 20%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 20% - USD ($)	Fidelity Advisor Asset Manager 20%: Class A	Fidelity Advisor Asset Manager 20%: Class M	Fidelity Advisor Asset Manager 20%: Class C	Fidelity Advisor Asset Manager 20%: Class I	Fidelity Advisor Asset Manager 20%: Class Z
1 year	$ 657	$ 458	$ 264	$ 59	$ 51
3 years	831	687	508	186	160
5 years	1,019	935	876	324	280
10 years	$ 1,564	$ 1,643	$ 1,911	$ 726	$ 628

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Expense Example, No Redemption {- Fidelity Asset Manager 20%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 20% - USD ($)	Fidelity Advisor Asset Manager 20%: Class A	Fidelity Advisor Asset Manager 20%: Class M	Fidelity Advisor Asset Manager 20%: Class C	Fidelity Advisor Asset Manager 20%: Class I	Fidelity Advisor Asset Manager 20%: Class Z
1 Year	$ 657	$ 458	$ 164	$ 59	$ 51
3 Years	831	687	508	186	160
5 Years	1,019	935	876	324	280
10 Years	$ 1,564	$ 1,643	$ 1,911	$ 726	$ 628

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 20% of assets in stocks, 50% of assets in bonds, and 30% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (10%-30%), bond class (40%-60%), and short-term/money market class (10%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	8.73%	June 30, 2009
Lowest Quarter Return	-2.82%	December 31, 2018
Year-to-Date Return	7.89%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 20%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 20%	Past 1 year	Past 5 years	Past 10 years
Fidelity Advisor Asset Manager 20%: Class A | Return Before Taxes	(7.60%)	1.18%	4.60%
Fidelity Advisor Asset Manager 20%: Class A | After Taxes on Distributions	(8.68%)	0.08%	3.61%
Fidelity Advisor Asset Manager 20%: Class A | After Taxes on Distributions and Sales	(4.20%)	0.58%	3.34%
Fidelity Advisor Asset Manager 20%: Class M | Return Before Taxes	(5.65%)	1.40%	4.58%
Fidelity Advisor Asset Manager 20%: Class C | Return Before Taxes	(3.67%)	1.61%	4.42%
Fidelity Advisor Asset Manager 20%: Class I | Return Before Taxes	(1.68%)	2.66%	5.51%
Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)	0.01%	2.52%	3.48%
Fidelity Asset Manager 20% Composite Index℠(reflects no deduction for fees or expenses)	(0.90%)	2.73%	4.19%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class A

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class M

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 20% | Fidelity Advisor Asset Manager 20%: Class C

On Class C shares redeemed less than one year after purchase.

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] On Class C shares redeemed less than one year after purchase.

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 20%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 20%</b>/Fidelity Asset Manager® 20%</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks a high level of current income by allocating its assets among stocks, bonds, short-term instruments and other investments. The fund also considers the potential for capital appreciation.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

Shareholder Fees {- Fidelity Asset Manager 20%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 20% USD ($)
(fees paid directly from your investment)	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 20%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 20% Fidelity Asset Manager 20%
Management fee	0.40%
Distribution and/or Service (12b-1) fees	none
Other expenses	0.11%
Acquired fund fees and expenses	0.02%
Total annual operating expenses	0.53%	[1]

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 20%}	09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 Fidelity Asset Manager 20% Fidelity Asset Manager 20% USD ($)
1 year	$ 54
3 years	170
5 years	296
10 years	$ 665

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 20% of assets in stocks, 50% of assets in bonds, and 30% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (10%-30%), bond class (40%-60%), and short-term/money market class (10%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a security to decrease. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	8.80%	June 30, 2009
Lowest Quarter Return	-2.70%	December 31, 2018
Year-to-Date Return	8.17%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 20%} - 09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 - Fidelity Asset Manager 20%	Past 1 year	Past 5 years	Past 10 years
Fidelity Asset Manager 20% | Return Before Taxes	(1.64%)	2.72%	5.55%
Fidelity Asset Manager 20% | After Taxes on Distributions	(2.92%)	1.46%	4.43%
Fidelity Asset Manager 20% | After Taxes on Distributions and Sales	(0.65%)	1.69%	4.06%
Bloomberg Barclays U.S. Aggregate Bond Index(reflects no deduction for fees, expenses, or taxes)	0.01%	2.52%	3.48%
Fidelity Asset Manager 20% Composite Index℠(reflects no deduction for fees or expenses)	(0.90%)	2.73%	4.19%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Total

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85%

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 85%</b>/Fidelity Advisor Asset Manager® 85% A, M, C, I, Z</p>

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Shareholder Fees {- Fidelity Asset Manager 85%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 85%	Fidelity Advisor Asset Manager 85%: Class A		Fidelity Advisor Asset Manager 85%: Class M		Fidelity Advisor Asset Manager 85%: Class C		Fidelity Advisor Asset Manager 85%: Class I	Fidelity Advisor Asset Manager 85%: Class Z
Maximum sales charge (load) on purchases (as a % of offering price)	5.75%		3.50%		none		none	none
Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)	none	[1]	none	[1]	1.00%	[2]	none	none

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Annual Operating Expenses {- Fidelity Asset Manager 85%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 85%		Fidelity Advisor Asset Manager 85%: Class A	Fidelity Advisor Asset Manager 85%: Class M	Fidelity Advisor Asset Manager 85%: Class C	Fidelity Advisor Asset Manager 85%: Class I	Fidelity Advisor Asset Manager 85%: Class Z
Management fee		0.54%	0.54%	0.54%	0.54%	0.54%
Distribution and/or Service (12b-1) fees		0.25%	0.50%	1.00%	none	none
Other expenses		0.22%	0.23%	0.23%	0.20%	0.08%
Acquired fund fees and expenses		0.03%	0.03%	0.03%	0.03%	0.03%
Total annual operating expenses	[1]	1.04%	1.30%	1.80%	0.77%	0.65%

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example {- Fidelity Asset Manager 85%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 85% - USD ($)	Fidelity Advisor Asset Manager 85%: Class A	Fidelity Advisor Asset Manager 85%: Class M	Fidelity Advisor Asset Manager 85%: Class C	Fidelity Advisor Asset Manager 85%: Class I	Fidelity Advisor Asset Manager 85%: Class Z
1 year	$ 675	$ 478	$ 283	$ 79	$ 66
3 years	887	748	566	246	208
5 years	1,116	1,038	975	428	362
10 years	$ 1,773	$ 1,863	$ 2,116	$ 954	$ 810

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Expense Example, No Redemption {- Fidelity Asset Manager 85%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 85% - USD ($)	Fidelity Advisor Asset Manager 85%: Class A	Fidelity Advisor Asset Manager 85%: Class M	Fidelity Advisor Asset Manager 85%: Class C	Fidelity Advisor Asset Manager 85%: Class I	Fidelity Advisor Asset Manager 85%: Class Z
1 Year	$ 675	$ 478	$ 183	$ 79	$ 66
3 Years	887	748	566	246	208
5 Years	1,116	1,038	975	428	362
10 Years	$ 1,773	$ 1,863	$ 2,116	$ 954	$ 810

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 47% of the average value of its portfolio.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

• Allocating the fund's assets between two main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), and the bond and short-term/money market class (fixed-income securities of all types and maturities, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities).

• Maintaining a neutral mix over time of 85% of assets in stocks and 15% of assets in bonds and short-term and money market instruments.

• Adjusting allocation between asset classes gradually within the following ranges: stock class (60%-100%) and bond and short-term/money market class (0%-40%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	20.68%	June 30, 2009
Lowest Quarter Return	-16.22%	September 30, 2011
Year-to-Date Return	15.92%	September 30, 2019

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

Average Annual Total Returns{- Fidelity Asset Manager 85%} - 09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 - Fidelity Asset Manager 85%	Past 1 year	Past 5 years	Past 10 years
Fidelity Advisor Asset Manager 85%: Class A | Return Before Taxes	(14.68%)	3.10%	9.74%
Fidelity Advisor Asset Manager 85%: Class A | After Taxes on Distributions	(15.69%)	1.88%	8.92%
Fidelity Advisor Asset Manager 85%: Class A | After Taxes on Distributions and Sales	(7.94%)	2.21%	7.91%
Fidelity Advisor Asset Manager 85%: Class M | Return Before Taxes	(12.93%)	3.28%	9.68%
Fidelity Advisor Asset Manager 85%: Class C | Return Before Taxes	(11.01%)	3.54%	9.55%
Fidelity Advisor Asset Manager 85%: Class I | Return Before Taxes	(9.29%)	4.62%	10.70%
S&P 500® Index(reflects no deduction for fees, expenses, or taxes)	(4.38%)	8.49%	13.12%
Fidelity Asset Manager 85% Composite Index℠(reflects no deduction for fees or expenses)	(6.59%)	5.53%	10.23%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class A

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class M

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 85% | Fidelity Advisor Asset Manager 85%: Class C

On Class C shares redeemed less than one year after purchase.

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] On Class C shares redeemed less than one year after purchase.

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 60%</b>/Fidelity Advisor Asset Manager® 60% A, M, C, I, Z</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks high total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 39% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

39.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

<font style="FONT-FAMILY: Times New Roman" size="3">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus.</font>

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 60% of assets in stocks, 35% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (40%-90%), bond class (10%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">institutional.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.</font>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	16.69%	June 30, 2009
Lowest Quarter Return	-10.89%	September 30, 2011
Year-to-Date Return	13.21%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

5.75%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.23%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.05%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 676

3 years

rr_ExpenseExampleYear03

890

5 years

rr_ExpenseExampleYear05

1,121

10 years

rr_ExpenseExampleYear10

1,784

1 Year

rr_ExpenseExampleNoRedemptionYear01

676

3 Years

rr_ExpenseExampleNoRedemptionYear03

890

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,121

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,784

2009

rr_AnnualReturn2009

32.37%

2010

rr_AnnualReturn2010

14.03%

2011

rr_AnnualReturn2011

(2.51%)

2012

rr_AnnualReturn2012

12.39%

2013

rr_AnnualReturn2013

16.57%

2014

rr_AnnualReturn2014

5.35%

2015

rr_AnnualReturn2015

(0.87%)

2016

rr_AnnualReturn2016

6.52%

2017

rr_AnnualReturn2017

16.00%

2018

rr_AnnualReturn2018

(6.89%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

13.21%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.69%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.89%)

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class M

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

3.50%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other expenses

rr_OtherExpensesOverAssets

0.24%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.31%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 479

3 years

rr_ExpenseExampleYear03

751

5 years

rr_ExpenseExampleYear05

1,043

10 years

rr_ExpenseExampleYear10

1,874

1 Year

rr_ExpenseExampleNoRedemptionYear01

479

3 Years

rr_ExpenseExampleNoRedemptionYear03

751

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,043

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,874

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.27%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.84%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

On Class C shares redeemed less than one year after purchase.

1 year

rr_ExpenseExampleYear01

$ 287

3 years

rr_ExpenseExampleYear03

579

5 years

rr_ExpenseExampleYear05

995

10 years

rr_ExpenseExampleYear10

2,159

1 Year

rr_ExpenseExampleNoRedemptionYear01

187

3 Years

rr_ExpenseExampleNoRedemptionYear03

579

5 Years

rr_ExpenseExampleNoRedemptionYear05

995

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,159

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.21%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.78%

^[2]

1 year

rr_ExpenseExampleYear01

$ 80

3 years

rr_ExpenseExampleYear03

249

5 years

rr_ExpenseExampleYear05

433

10 years

rr_ExpenseExampleYear10

966

1 Year

rr_ExpenseExampleNoRedemptionYear01

80

3 Years

rr_ExpenseExampleNoRedemptionYear03

249

5 Years

rr_ExpenseExampleNoRedemptionYear05

433

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 966

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Advisor Asset Manager 60%: Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.09%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.66%

^[2]

1 year

rr_ExpenseExampleYear01

$ 67

3 years

rr_ExpenseExampleYear03

211

5 years

rr_ExpenseExampleYear05

368

10 years

rr_ExpenseExampleYear10

822

1 Year

rr_ExpenseExampleNoRedemptionYear01

67

3 Years

rr_ExpenseExampleNoRedemptionYear03

211

5 Years

rr_ExpenseExampleNoRedemptionYear05

368

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 822

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

<font style="FONT-FAMILY: Times New Roman" size="3">Performance history will be available for Class Z after Class Z has been in operation for one calendar year.</font>

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Return Before Taxes | Fidelity Advisor Asset Manager 60%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class A - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(12.24%)

Past 5 years

rr_AverageAnnualReturnYear05

2.52%

Past 10 years

rr_AverageAnnualReturnYear10

8.12%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Return Before Taxes | Fidelity Advisor Asset Manager 60%: Class M

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class M - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(10.37%)

Past 5 years

rr_AverageAnnualReturnYear05

2.74%

Past 10 years

rr_AverageAnnualReturnYear10

8.12%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Return Before Taxes | Fidelity Advisor Asset Manager 60%: Class C

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class C - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(8.44%)

Past 5 years

rr_AverageAnnualReturnYear05

2.96%

Past 10 years

rr_AverageAnnualReturnYear10

7.96%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Return Before Taxes | Fidelity Advisor Asset Manager 60%: Class I

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class I - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(6.64%)

Past 5 years

rr_AverageAnnualReturnYear05

4.03%

Past 10 years

rr_AverageAnnualReturnYear10

9.05%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | After Taxes on Distributions | Fidelity Advisor Asset Manager 60%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(13.15%)

Past 5 years

rr_AverageAnnualReturnYear05

1.51%

Past 10 years

rr_AverageAnnualReturnYear10

7.20%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | After Taxes on Distributions and Sales | Fidelity Advisor Asset Manager 60%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(6.73%)

Past 5 years

rr_AverageAnnualReturnYear05

1.73%

Past 10 years

rr_AverageAnnualReturnYear10

6.39%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 60% | Fidelity Asset Manager 60% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.48%)

Past 5 years

rr_AverageAnnualReturnYear05

4.62%

Past 10 years

rr_AverageAnnualReturnYear10

8.18%

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[3] On Class C shares redeemed less than one year after purchase.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 70%</b>/Fidelity Advisor Asset Manager® 70% A, M, C, I, Z</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. In addition to the fees and expenses described below, your broker may also require you to pay brokerage commissions on purchases and sales of certain share classes 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 $50,000 in the fund or certain other Fidelity^® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus. Different intermediaries may provide additional waivers or reductions of the sales charge. Please see “Sales Charge Waiver Policies Applied by Certain Intermediaries” in the “Appendix” section of the prospectus.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(fees paid directly from your investment)</p>

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 41% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

41.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

<font style="FONT-FAMILY: Times New Roman" size="3">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 49 of the prospectus.</font>

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Hold Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 70% of assets in stocks, 25% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (50%-100%), bond class (0%-50%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit institutional.fidelity.com for more recent performance information.

Performance history will be available for Class Z after Class Z has been in operation for one calendar year.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">institutional.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.</font>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart for Class A:	Returns	Quarter ended
Highest Quarter Return	18.36%	June 30, 2009
Lowest Quarter Return	-13.21%	September 30, 2011
Year-to-Date Return	14.25%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

<font style="FONT-FAMILY: Times New Roman" size="3">Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.</font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

5.75%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.21%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.03%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 674

3 years

rr_ExpenseExampleYear03

884

5 years

rr_ExpenseExampleYear05

1,111

10 years

rr_ExpenseExampleYear10

1,762

1 Year

rr_ExpenseExampleNoRedemptionYear01

674

3 Years

rr_ExpenseExampleNoRedemptionYear03

884

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,111

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,762

2009

rr_AnnualReturn2009

35.31%

2010

rr_AnnualReturn2010

15.31%

2011

rr_AnnualReturn2011

(4.02%)

2012

rr_AnnualReturn2012

13.76%

2013

rr_AnnualReturn2013

19.75%

2014

rr_AnnualReturn2014

5.29%

2015

rr_AnnualReturn2015

(0.87%)

2016

rr_AnnualReturn2016

6.76%

2017

rr_AnnualReturn2017

18.35%

2018

rr_AnnualReturn2018

(7.98%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

14.25%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.36%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(13.21%)

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class M

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

3.50%

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other expenses

rr_OtherExpensesOverAssets

0.20%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.27%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

1 year

rr_ExpenseExampleYear01

$ 475

3 years

rr_ExpenseExampleYear03

739

5 years

rr_ExpenseExampleYear05

1,023

10 years

rr_ExpenseExampleYear10

1,830

1 Year

rr_ExpenseExampleNoRedemptionYear01

475

3 Years

rr_ExpenseExampleNoRedemptionYear03

739

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,023

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,830

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[3]

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.21%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

1.78%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

On Class C shares redeemed less than one year after purchase.

1 year

rr_ExpenseExampleYear01

$ 281

3 years

rr_ExpenseExampleYear03

560

5 years

rr_ExpenseExampleYear05

964

10 years

rr_ExpenseExampleYear10

2,095

1 Year

rr_ExpenseExampleNoRedemptionYear01

181

3 Years

rr_ExpenseExampleNoRedemptionYear03

560

5 Years

rr_ExpenseExampleNoRedemptionYear05

964

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,095

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.18%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.75%

^[2]

1 year

rr_ExpenseExampleYear01

$ 77

3 years

rr_ExpenseExampleYear03

240

5 years

rr_ExpenseExampleYear05

417

10 years

rr_ExpenseExampleYear10

930

1 Year

rr_ExpenseExampleNoRedemptionYear01

77

3 Years

rr_ExpenseExampleNoRedemptionYear03

240

5 Years

rr_ExpenseExampleNoRedemptionYear05

417

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 930

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Advisor Asset Manager 70%: Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) on purchases (as a % of offering price)

rr_MaximumCumulativeSalesChargeOverOfferingPrice

none

Maximum contingent deferred sales charge (as a % of the lesser of original purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.08%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.65%

^[2]

1 year

rr_ExpenseExampleYear01

$ 66

3 years

rr_ExpenseExampleYear03

208

5 years

rr_ExpenseExampleYear05

362

10 years

rr_ExpenseExampleYear10

810

1 Year

rr_ExpenseExampleNoRedemptionYear01

66

3 Years

rr_ExpenseExampleNoRedemptionYear03

208

5 Years

rr_ExpenseExampleNoRedemptionYear05

362

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 810

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

<font style="FONT-FAMILY: Times New Roman" size="3">Performance history will be available for Class Z after Class Z has been in operation for one calendar year.</font>

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Return Before Taxes | Fidelity Advisor Asset Manager 70%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class A - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(13.27%)

Past 5 years

rr_AverageAnnualReturnYear05

2.72%

Past 10 years

rr_AverageAnnualReturnYear10

8.84%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Return Before Taxes | Fidelity Advisor Asset Manager 70%: Class M

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class M - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(11.44%)

Past 5 years

rr_AverageAnnualReturnYear05

2.95%

Past 10 years

rr_AverageAnnualReturnYear10

8.82%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Return Before Taxes | Fidelity Advisor Asset Manager 70%: Class C

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class C - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(9.51%)

Past 5 years

rr_AverageAnnualReturnYear05

3.18%

Past 10 years

rr_AverageAnnualReturnYear10

8.68%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Return Before Taxes | Fidelity Advisor Asset Manager 70%: Class I

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Class I - Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.70%)

Past 5 years

rr_AverageAnnualReturnYear05

4.24%

Past 10 years

rr_AverageAnnualReturnYear10

9.80%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | After Taxes on Distributions | Fidelity Advisor Asset Manager 70%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(14.47%)

Past 5 years

rr_AverageAnnualReturnYear05

1.43%

Past 10 years

rr_AverageAnnualReturnYear10

8.00%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | After Taxes on Distributions and Sales | Fidelity Advisor Asset Manager 70%: Class A

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 70%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.06%)

Past 5 years

rr_AverageAnnualReturnYear05

1.91%

Past 10 years

rr_AverageAnnualReturnYear10

7.11%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds AMCIZ Combo PRO-12 | Fidelity Asset Manager 70% | Fidelity Asset Manager 70% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(5.30%)

Past 5 years

rr_AverageAnnualReturnYear05

4.94%

Past 10 years

rr_AverageAnnualReturnYear10

8.91%

[1] Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% or 0.25%, respectively.

[2] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

[3] On Class C shares redeemed less than one year after purchase.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 60%</b>/Fidelity Asset Manager® 60%</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks high total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 39% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

39.00%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets among three main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), the bond class (fixed-income securities of all types maturing in more than one year, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities), and the short-term/money market class (fixed-income securities of all types maturing in one year or less, including funds that invest in such securities).

• Maintaining a neutral mix over time of 60% of assets in stocks, 35% of assets in bonds, and 5% of assets in short-term and money market instruments.

• Adjusting allocation among asset classes gradually within the following ranges: stock class (40%-90%), bond class (10%-60%), and short-term/money market class (0%-50%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">www.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	16.85%	June 30, 2009
Lowest Quarter Return	-10.84%	September 30, 2011
Year-to-Date Return	13.54%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60% | Fidelity Asset Manager 60%

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.16%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.73%

^[1]

1 year

rr_ExpenseExampleYear01

$ 75

3 years

rr_ExpenseExampleYear03

233

5 years

rr_ExpenseExampleYear05

406

10 years

rr_ExpenseExampleYear10

$ 906

2009

rr_AnnualReturn2009

32.72%

2010

rr_AnnualReturn2010

14.29%

2011

rr_AnnualReturn2011

(2.16%)

2012

rr_AnnualReturn2012

12.72%

2013

rr_AnnualReturn2013

16.89%

2014

rr_AnnualReturn2014

5.76%

2015

rr_AnnualReturn2015

(0.55%)

2016

rr_AnnualReturn2016

6.76%

2017

rr_AnnualReturn2017

16.40%

2018

rr_AnnualReturn2018

(6.61%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

13.54%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.85%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.84%)

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60% | Return Before Taxes | Fidelity Asset Manager 60%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(6.61%)

Past 5 years

rr_AverageAnnualReturnYear05

4.07%

Past 10 years

rr_AverageAnnualReturnYear10

9.09%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60% | After Taxes on Distributions | Fidelity Asset Manager 60%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(7.68%)

Past 5 years

rr_AverageAnnualReturnYear05

2.91%

Past 10 years

rr_AverageAnnualReturnYear10

8.05%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60% | After Taxes on Distributions and Sales | Fidelity Asset Manager 60%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 60%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(3.36%)

Past 5 years

rr_AverageAnnualReturnYear05

2.88%

Past 10 years

rr_AverageAnnualReturnYear10

7.15%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 60% | Fidelity Asset Manager 60% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.48%)

Past 5 years

rr_AverageAnnualReturnYear05

4.62%

Past 10 years

rr_AverageAnnualReturnYear10

8.18%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

FIDELITY CHARLES STREET TRUST

Prospectus Date

rr_ProspectusDate

Nov. 29, 2019

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85%

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<p style="font: bold 20pt Arial, Helvetica, sans-serif;">Fund Summary</p><p style="font: normal 12pt Arial, Helvetica, sans-serif;"><b>Fund/Class</b>:<br/><b>Fidelity Asset Manager® 85%</b>/Fidelity Asset Manager® 85%</p>

Objective [Heading]

rr_ObjectiveHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;">Investment Objective</font>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks to maximize total return over the long term by allocating its assets among stocks, bonds, short-term instruments, and other investments.

Expense [Heading]

rr_ExpenseHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Fee Table</b></font>

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Shareholder fees</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px"></p>

(fees paid directly from your investment)

rr_ShareholderFeeOther

none

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

<p style="font: bold 11pt Arial, sans-serif; margin-bottom: 0px;">Annual Operating Expenses</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">(expenses that you pay each year as a % of the value of your investment)</p>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Portfolio Turnover</b></font>

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 operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 47% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

47.00%

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

<font style="FONT-FAMILY: Times New Roman" size="3">Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.</font>

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

<p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Sell All Shares</p>

Strategy [Heading]

rr_StrategyHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Strategies</b></font>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

• Allocating the fund's assets between two main asset classes: the stock class (equity securities of all types, including funds that invest in such securities), and the bond and short-term/money market class (fixed-income securities of all types and maturities, including lower-quality debt securities which are sometimes referred to as high yield debt securities or junk bonds, and funds that invest in such securities).

• Maintaining a neutral mix over time of 85% of assets in stocks and 15% of assets in bonds and short-term and money market instruments.

• Adjusting allocation between asset classes gradually within the following ranges: stock class (60%-100%) and bond and short-term/money market class (0%-40%).

• Investing in domestic and foreign issuers.

• Investing in Fidelity's central funds (specialized investment vehicles used by Fidelity^® funds to invest in particular security types or investment disciplines).

Risk [Heading]

rr_RiskHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Principal Investment Risks</b></font>

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

• Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.

• Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease.

• Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.

• Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change.

• Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments.

An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You could lose money by investing in the fund.

Risk Lose Money [Text]

rr_RiskLoseMoney

<font style="FONT-FAMILY: Times New Roman" size="3">You could lose money by investing in the fund.</font>

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

<font style="FONT-FAMILY: Times New Roman" size="3">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</font>

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Performance</b></font>

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time. The indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

<font style="FONT-FAMILY: Times New Roman" size="3">The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and a hypothetical composite of market indexes over various periods of time.</font>

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

<font style="FONT-FAMILY: Times New Roman" size="3">www.fidelity.com</font>

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

<font style="FONT-FAMILY: Times New Roman" size="3">Past performance (before and after taxes) is not an indication of future performance.</font>

Bar Chart [Heading]

rr_BarChartHeading

<p style="font:bold 11pt Arial, sans-serif; margin-bottom: 0px;">Year-by-Year Returns</p><p style="font: bold 9pt Arial, sans-serif; margin-top: 0px">Calendar Years</p>

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the periods shown in the chart:	Returns	Quarter ended
Highest Quarter Return	20.85%	June 30, 2009
Lowest Quarter Return	-16.11%	September 30, 2011
Year-to-Date Return	16.21%	September 30, 2019

Performance Table Heading

rr_PerformanceTableHeading

<font style="font: bold 16pt Arial, Helvetica, sans-serif;"><b>Average Annual Returns</b></font>

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

<font style="FONT-FAMILY: Times New Roman" size="3">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</font>

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

<font style="FONT-FAMILY: Times New Roman" size="3">The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</font>

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

<font style="FONT-FAMILY: Times New Roman" size="3">Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</font>

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.

For the periods ended December 31, 2018

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85% | Fidelity Asset Manager 85%

Risk/Return:

rr_RiskReturnAbstract

Management fee

rr_ManagementFeesOverAssets

0.54%

Distribution and/or Service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.17%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.03%

Total annual operating expenses

rr_ExpensesOverAssets

0.74%

^[1]

1 year

rr_ExpenseExampleYear01

$ 76

3 years

rr_ExpenseExampleYear03

237

5 years

rr_ExpenseExampleYear05

411

10 years

rr_ExpenseExampleYear10

$ 918

2009

rr_AnnualReturn2009

38.67%

2010

rr_AnnualReturn2010

16.57%

2011

rr_AnnualReturn2011

(6.10%)

2012

rr_AnnualReturn2012

15.93%

2013

rr_AnnualReturn2013

25.16%

2014

rr_AnnualReturn2014

5.90%

2015

rr_AnnualReturn2015

(0.58%)

2016

rr_AnnualReturn2016

7.38%

2017

rr_AnnualReturn2017

22.27%

2018

rr_AnnualReturn2018

(9.22%)

Year to Date Return, Label

rr_YearToDateReturnLabel

Year-to-Date Return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2019

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

16.21%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter Return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.85%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter Return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(16.11%)

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85% | Return Before Taxes | Fidelity Asset Manager 85%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return Before Taxes</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(9.22%)

Past 5 years

rr_AverageAnnualReturnYear05

4.64%

Past 10 years

rr_AverageAnnualReturnYear10

10.70%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85% | After Taxes on Distributions | Fidelity Asset Manager 85%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(10.41%)

Past 5 years

rr_AverageAnnualReturnYear05

3.29%

Past 10 years

rr_AverageAnnualReturnYear10

9.77%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85% | After Taxes on Distributions and Sales | Fidelity Asset Manager 85%

Risk/Return:

rr_RiskReturnAbstract

Column

rr_AverageAnnualReturnColumnName

Fidelity Asset Manager 85%

Label

rr_AverageAnnualReturnLabel

<font style="FONT-FAMILY: Times New Roman" ><b>Return After Taxes on Distributions and Sale of Fund Shares</b></font>

Past 1 year

rr_AverageAnnualReturnYear01

(4.67%)

Past 5 years

rr_AverageAnnualReturnYear05

3.36%

Past 10 years

rr_AverageAnnualReturnYear10

8.69%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85% | S&P 500® Index(reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(4.38%)

Past 5 years

rr_AverageAnnualReturnYear05

8.49%

Past 10 years

rr_AverageAnnualReturnYear10

13.12%

09.30 Fidelity Asset Manager Funds Retail Combo PRO-09 | Fidelity Asset Manager 85% | Fidelity Asset Manager 85% Composite Index℠(reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

Past 1 year

rr_AverageAnnualReturnYear01

(6.59%)

Past 5 years

rr_AverageAnnualReturnYear05

5.53%

Past 10 years

rr_AverageAnnualReturnYear10

10.23%

[1] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.