Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	THE HARTFORD MUTUAL FUNDS II, INC.
Prospectus Date	rr_ProspectusDate	Feb. 28, 2025
The Hartford Growth Opportunities Fund
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:20pt;font-weight:bold;">The Hartford Growth Opportunities Fund Summary Section</span>
Objective [Heading]	rr_ObjectiveHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">INVESTMENT OBJECTIVE. </span>
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund seeks capital appreciation.
Expense [Heading]	rr_ExpenseHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">YOUR EXPENSES. </span>
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The table below describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below. Please contact your financial intermediary for more information regarding whether you may be required to pay a brokerage commission or other fees. You may qualify for sales charge discounts for Class A shares if you and your family invest, or agree to invest in the future, at least $50,000in certain classes of Hartford mutual funds or in The Hartford® SMART529® College Savings Plan. More information about these and other discounts is available from your financial professional and in the “How Sales Charges Are Calculated” section beginning on page 99 of the Fund’s statutory prospectus. Descriptions of any financial intermediary specific sales charge waivers and discounts are set forth in Appendix A to the statutory prospectus.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Shareholder Fees</span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;"> (fees paid directly from your investment):</span>
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Annual Fund Operating Expenses</span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;"> (expenses that you pay each year as a percentage of the value of your investment):</span>
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Portfolio Turnover. </span>
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the fiscal year ended October 31, 2024, the Fund’s portfolio turnover rate was 104% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	104.00%
Expenses Deferred Charges [Text Block]	rr_ExpensesDeferredChargesTextBlock	Investments of $1 million or more will not be subject to a front-end sales charge, but may be subject to a 1.00% contingent deferred sales charge.
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	<span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">You may qualify for </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">sales charge discounts for Class A shares if you and your family invest, or agree to invest in the future, at least </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">$50,000</span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">in certain classes of Hartford mutual funds or in The Hartford</span><span style="color:#000000;font-family:Arial;font-size:6.5pt;position:relative;top:-2.75pt;">®</span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;"> SMART529</span><span style="color:#000000;font-family:Arial;font-size:6.5pt;position:relative;top:-2.75pt;">®</span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;"> College Savings Plan.</span>
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
Expense Example [Heading]	rr_ExpenseExampleHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Example. </span>
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The example below is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as shown below, redeem all of your shares at the end of those periods. The example also assumes that:●Your investment has a 5% return each year ●The Fund’s operating expenses remain the same ●You reinvest all dividends and distributions.Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	<span style="color:#000000;font-family:Arial;font-size:9pt;">If you did not redeem your shares:</span>
Strategy [Heading]	rr_StrategyHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">PRINCIPAL INVESTMENT STRATEGY. </span>
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Under normal circumstances, the Fund invests primarily in common stocks that the sub-adviser, Wellington Management Company LLP (“Wellington Management”), believes exhibit long-term growth potential. Wellington Management uses fundamental analysis to identify companies with accelerating operating characteristics for purchase.The Fund may invest in securities of companies of any market capitalization, but tends to focus on mid to large capitalization stocks. The Fund may trade securities actively. Based on market or economic conditions, the Fund may, through its normal bottom-up stock selection process, focus in one or more sectors of the market including, but not limited to, the information technology, consumer discretionary and communication services sectors. The Fund may invest up to 10% of its net assets in foreign issuers and non-dollar securities.
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">PRINCIPAL RISKS. </span>
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">PAST PERFORMANCE.</span>
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The performance information indicates the risks of investing in the Fund. Keep in mind that past performance (before and after taxes) does not indicate future results. Updated performance information is available at hartfordfunds.com. The returns for the Fund in the bar chart and table:●Assume reinvestment of all dividends and distributions ●Reflect fee waivers and/or expense limitation arrangements, if any. Absent any applicable fee waivers and/or expense limitation arrangements, performance would have been lower.The bar chart:●Shows how the Fund’s total return has varied from year to year ●Returns do not include sales charges. If sales charges were reflected, returns would have been lower●Shows the returns of Class A shares. Returns for the Fund’s other classes differ only to the extent that the classes do not have the same expenses.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	<span style="color:#000000;font-family:Arial Narrow;font-size:10pt;"> The performance information indicates the risks of investing in the Fund. </span>
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	<span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">hartfordfunds.com</span>
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	<span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Keep in mind that past </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">performance (before and after taxes) does not indicate future results.</span>
Bar Chart [Heading]	rr_BarChartHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Total returns by calendar year (excludes sales charges)</span>
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	During the periods shown in the chart above:ReturnsQuarter EndedBest Quarter Return39.27%June 30, 2020Worst Quarter Return-29.59%June 30, 2022
Performance Table Heading	rr_PerformanceTableHeading	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Average Annual Total Returns. </span>
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	<span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">After-tax returns, which are calculated using the historical highest individual federal </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">marginal income tax rates and do not reflect the impact of state and local taxes, are shown only for Class A shares and will vary for other classes.</span>
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	<span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">Actual after-tax returns, which depend on an investor’s particular tax situation, may differ from those shown and are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.</span>
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	<span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">After-tax returns, which are calculated using the historical highest individual federal </span><span style="color:#000000;font-family:Arial Narrow;font-size:10pt;">marginal income tax rates and do not reflect the impact of state and local taxes, are shown only for Class A shares and will vary for other classes.</span>
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	The table below shows returns for the Fund over time compared to those of three indices. The Russell 3000 Growth Index serves as the Fund’s performance index because the Fund’s investment manager believes it is more representative of the Fund’s investment strategy. The Russell 1000 Growth Index serves as the Fund’s secondary performance index. The Russell 3000 Index serves as the Fund’s regulatory index and provides a broad measure of market performance. After-tax returns, which are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes, are shown only for Class A shares and will vary for other classes.Actual after-tax returns, which depend on an investor’s particular tax situation, may differ from those shown and are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Caption	rr_AverageAnnualReturnCaption	<span style="color:#000000;font-family:Arial Narrow;font-size:11pt;font-weight:bold;">Average annual total returns for periods ending December 31, 2024 (including sales charges)</span>
The Hartford Growth Opportunities Fund | Risk Lose Money [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	When you sell your shares they may be worth more or less than what you paid for them, which means that you could lose money as a result of your investment.
The Hartford Growth Opportunities Fund | Risk Not Insured Depository Institution [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
The Hartford Growth Opportunities Fund | Market Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market Risk –  Market risk is the risk that one or more markets in which the Fund invests will go down in value, including the possibility that the markets will go down sharply and unpredictably. Securities of a company may decline in value due to its financial prospects and activities, including certain operational impacts, such as data breaches and cybersecurity attacks. Securities may also decline in value due to general market and economic movements and trends, including adverse changes to credit markets, or as a result of other events such as geopolitical events, natural disasters, or widespread pandemics (such as COVID-19) or other adverse public health developments.
The Hartford Growth Opportunities Fund | Equity Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Equity Risk –  The risk that the price of equity or equity related securities may decline due to changes in a company’s financial condition and overall market and economic conditions.
The Hartford Growth Opportunities Fund | Large Cap Securities Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Large Cap Securities Risk –  The securities of large market capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.
The Hartford Growth Opportunities Fund | Mid Cap Securities Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Mid-Cap Securities Risk –  The securities of mid-capitalization companies generally trade in lower volumes and are generally subject to greater and less predictable price changes than the securities of larger capitalization companies.
The Hartford Growth Opportunities Fund | Growth Investing Style Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Growth Investing Style Risk –  If the sub-adviser incorrectly assesses a company’s prospects for growth or how other investors will value the company’s growth, then the price of the company’s stock may decrease, or may not increase to the level anticipated by the sub-adviser. In addition, growth stocks may be more volatile than other stocks because they are more sensitive to investors’ perceptions of the issuing company’s growth potential. Also, the growth investing style may over time go in and out of favor. At times when the investing style used by the Fund is out of favor, the Fund may underperform other equity funds that use different investing styles.
The Hartford Growth Opportunities Fund | Sector Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Sector Risk –  The Fund’s performance may be closely tied to the performance of certain sectors, including the information technology, the consumer discretionary, and communication services sectors. As a result, the Fund will be sensitive to changes in, and its performance may depend to a greater extent on, factors impacting these sectors. The information technology sector includes companies engaged in internet software and services, technology hardware and storage peripherals, electronic equipment instruments and components, and semiconductors and semiconductor equipment. Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on their profit margins. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face obsolescence due to rapid technological developments, frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Companies in the information technology sector are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights may adversely affect the profitability of these companies. Companies in the consumer discretionary sector are subject to the risks associated with adverse changes in consumer sentiment and buying patterns, the effects of inflation and disruption in the supply chain that negatively impact the availability of products. Companies in this sector may also be adversely affected by supply and demand for certain products and services, price fluctuations, product obsolescence and product liability claims, governmental regulation, exchange rates, world events, general economic conditions and other factors. In addition, certain companies in the consumer discretionary sector may be cyclical and have occasional sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs. Companies in the communication services sector may be greatly affected by technological advancements and market competition, including research and development costs, substantial capital requirements, pricing competition and government regulations. Certain communication services companies may also be susceptible to network security breaches and may be targets of hacking and potential theft of proprietary or consumer information or disruptions in service. This sector may be impacted by fluctuating market demands, as well as shifting demographics and unpredictable changes in consumer preferences.
The Hartford Growth Opportunities Fund | Focused Portfolio Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Focused Portfolio Risk –  Because the Fund may invest in a limited number of companies, the Fund is subject to greater risk of loss if any of those securities decline in price.
The Hartford Growth Opportunities Fund | Active Investment Management Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Active Investment Management Risk –  The risk that, if the sub-adviser’s investment strategy does not perform as expected, the Fund could underperform its peers or lose money. Although the sub-adviser considers several factors when making investment decisions, the sub-adviser may not evaluate every factor prior to investing in a company or issuer, and the sub-adviser may determine that certain factors are more significant than others.
The Hartford Growth Opportunities Fund | Active Trading Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Active Trading Risk –  Active trading could increase the Fund’s transaction costs and may increase your tax liability as compared to a fund with less active trading policies. These effects may adversely affect Fund performance.
The Hartford Growth Opportunities Fund | Foreign Investments Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Foreign Investments Risk –  Investments in foreign securities may be riskier, more volatile, and less liquid than investments in U.S. securities. Differences between the U.S. and foreign regulatory regimes and securities markets, including the less stringent investor protection, less stringent accounting, corporate governance, financial reporting and disclosure standards of some foreign markets, as well as political and economic developments in foreign countries and regions and the U.S. (including the imposition of sanctions, tariffs, or other governmental restrictions), may affect the value of the Fund’s investments in foreign securities. Changes in currency exchange rates may also adversely affect the Fund’s foreign investments. The Fund may invest in depositary receipts, such as American Depositary Receipts. Depositary receipts are generally subject to the same risks of investing in the foreign securities they evidence or into which they may be converted.
The Hartford Growth Opportunities Fund | Large Shareholder Transaction Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Large Shareholder Transaction Risk –  The Fund may experience adverse effects when certain large shareholders redeem or purchase large amounts of shares of the Fund. Such redemptions may cause the Fund to sell securities at times when it would not otherwise do so or borrow money (at a cost to the Fund), which may negatively impact the Fund’s performance and liquidity. Similarly, large purchases may adversely affect the Fund’s performance to the extent that the Fund is delayed in investing new cash and is required to maintain a larger cash position than it ordinarily would. These transactions may also accelerate the realization of taxable income to shareholders if such sales of investments resulted in gains, and may also increase transaction costs.
The Hartford Growth Opportunities Fund | Class A
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.50%
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.13%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.08%
Year 1	rr_ExpenseExampleYear01	$ 654
Year 3	rr_ExpenseExampleYear03	875
Year 5	rr_ExpenseExampleYear05	1,113
Year 10	rr_ExpenseExampleYear10	$ 1,795
2015	rr_AnnualReturn2015	10.55%
2016	rr_AnnualReturn2016	(1.10%)
2017	rr_AnnualReturn2017	30.21%
2018	rr_AnnualReturn2018	(0.15%)
2019	rr_AnnualReturn2019	29.99%
2020	rr_AnnualReturn2020	61.42%
2021	rr_AnnualReturn2021	7.42%
2022	rr_AnnualReturn2022	(37.04%)
2023	rr_AnnualReturn2023	40.66%
2024	rr_AnnualReturn2024	41.90%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Best Quarter Return</span>
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	39.27%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:9pt;font-weight:bold;margin-left:0.0pt;">Worst Quarter Return</span>
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2022
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(29.59%)
The Hartford Growth Opportunities Fund | Class C
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	1.00%
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	0.16%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.86%
Year 1	rr_ExpenseExampleYear01	$ 289
Year 3	rr_ExpenseExampleYear03	585
Year 5	rr_ExpenseExampleYear05	1,006
Year 10	rr_ExpenseExampleYear10	2,180
Year 1	rr_ExpenseExampleNoRedemptionYear01	189
Year 3	rr_ExpenseExampleNoRedemptionYear03	585
Year 5	rr_ExpenseExampleNoRedemptionYear05	1,006
Year 10	rr_ExpenseExampleNoRedemptionYear10	$ 2,180
The Hartford Growth Opportunities Fund | Class I
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.13%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.83%
Year 1	rr_ExpenseExampleYear01	$ 85
Year 3	rr_ExpenseExampleYear03	265
Year 5	rr_ExpenseExampleYear05	460
Year 10	rr_ExpenseExampleYear10	$ 1,025
The Hartford Growth Opportunities Fund | Class R3
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	0.24%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.44%
Year 1	rr_ExpenseExampleYear01	$ 147
Year 3	rr_ExpenseExampleYear03	456
Year 5	rr_ExpenseExampleYear05	787
Year 10	rr_ExpenseExampleYear10	$ 1,724
The Hartford Growth Opportunities Fund | Class R4
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	0.18%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.13%
Year 1	rr_ExpenseExampleYear01	$ 115
Year 3	rr_ExpenseExampleYear03	359
Year 5	rr_ExpenseExampleYear05	622
Year 10	rr_ExpenseExampleYear10	$ 1,375
The Hartford Growth Opportunities Fund | Class R5
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.13%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.83%
Year 1	rr_ExpenseExampleYear01	$ 85
Year 3	rr_ExpenseExampleYear03	265
Year 5	rr_ExpenseExampleYear05	460
Year 10	rr_ExpenseExampleYear10	$ 1,025
The Hartford Growth Opportunities Fund | Class R6
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.03%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.73%
Year 1	rr_ExpenseExampleYear01	$ 75
Year 3	rr_ExpenseExampleYear03	233
Year 5	rr_ExpenseExampleYear05	406
Year 10	rr_ExpenseExampleYear10	$ 906
The Hartford Growth Opportunities Fund | Class Y
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.11%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.81%
Year 1	rr_ExpenseExampleYear01	$ 83
Year 3	rr_ExpenseExampleYear03	259
Year 5	rr_ExpenseExampleYear05	450
Year 10	rr_ExpenseExampleYear10	$ 1,002
The Hartford Growth Opportunities Fund | Class F
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a percentage of purchase price or redemption proceeds, whichever is less)	rr_MaximumDeferredSalesChargeOverOther	none
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.03%	[2]
Total annual fund operating expenses	rr_ExpensesOverAssets	0.73%
Year 1	rr_ExpenseExampleYear01	$ 75
Year 3	rr_ExpenseExampleYear03	233
Year 5	rr_ExpenseExampleYear05	406
Year 10	rr_ExpenseExampleYear10	$ 906
The Hartford Growth Opportunities Fund | After Taxes on Distributions | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	34.09%
5 Years	rr_AverageAnnualReturnYear05	13.19%
10 Years	rr_AverageAnnualReturnYear10	11.52%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	34.09%
5 Years	rr_AverageAnnualReturnYear05	15.54%
10 Years	rr_AverageAnnualReturnYear10	14.30%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class C
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	39.75%
5 Years	rr_AverageAnnualReturnYear05	15.96%
10 Years	rr_AverageAnnualReturnYear10	14.08%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class I
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	42.27%
5 Years	rr_AverageAnnualReturnYear05	17.16%
10 Years	rr_AverageAnnualReturnYear10	15.23%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class R3
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	41.40%
5 Years	rr_AverageAnnualReturnYear05	16.44%
10 Years	rr_AverageAnnualReturnYear10	14.54%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class R4
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	41.84%
5 Years	rr_AverageAnnualReturnYear05	16.80%
10 Years	rr_AverageAnnualReturnYear10	14.90%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class R5
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	42.26%
5 Years	rr_AverageAnnualReturnYear05	17.14%
10 Years	rr_AverageAnnualReturnYear10	15.23%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class R6
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	42.39%
5 Years	rr_AverageAnnualReturnYear05	17.26%
10 Years	rr_AverageAnnualReturnYear10	15.34%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class Y
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	42.30%
5 Years	rr_AverageAnnualReturnYear05	17.17%
10 Years	rr_AverageAnnualReturnYear10	15.30%
The Hartford Growth Opportunities Fund | Return Before Taxes | Class F
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	42.40%	[3]
5 Years	rr_AverageAnnualReturnYear05	17.26%	[3]
10 Years	rr_AverageAnnualReturnYear10	15.31%	[3]
The Hartford Growth Opportunities Fund | After Taxes on Distributions and Sale of Fund Shares | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	20.18%
5 Years	rr_AverageAnnualReturnYear05	11.68%
10 Years	rr_AverageAnnualReturnYear10	10.64%
The Hartford Growth Opportunities Fund | Russell 3000 Growth Index (reflects no deduction for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	32.46%
5 Years	rr_AverageAnnualReturnYear05	18.25%
10 Years	rr_AverageAnnualReturnYear10	16.22%
The Hartford Growth Opportunities Fund | Russell 1000 Growth Index (reflects no deduction for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	33.36%
5 Years	rr_AverageAnnualReturnYear05	18.96%
10 Years	rr_AverageAnnualReturnYear10	16.78%
The Hartford Growth Opportunities Fund | Russell 3000 Index (reflects no deduction for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	23.81%
5 Years	rr_AverageAnnualReturnYear05	13.86%
10 Years	rr_AverageAnnualReturnYear10	12.55%

[1] Investments of $1 million or more will not be subject to a front-end sales charge, but may be subject to a 1.00% contingent deferred sales charge.

[2] “Other expenses” exclude the expenses associated with the Fund’s shareholder meeting for all share classes and with respect to Class C only, “Other expenses” also exclude the expenses associated with the reverse stock split. If these expenses were included, “Other expenses” would have been as follows: 0.16% (Class A), 0.22% (Class C), 0.16% (Class I), 0.27% (Class R3), 0.21% (Class R4), 0.16% (Class R5), 0.06% (Class R6), 0.14% (Class Y), and 0.06% (Class F).

[3] Class F shares commenced operations on February 28, 2017 and performance prior to that date is that of the Fund’s Class I shares. Performance prior to an inception date of a class has not been adjusted to reflect the operating expenses of such class.