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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Entity Central Index Key dei_EntityCentralIndexKey 0001605803
Hartford Multifactor US Equity ETF  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Hartford Multifactor US Equity ETF Summary Section
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE.
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks to provide investment results that, before fees and expenses, correspond to the total return performance of an index that tracks the performance of exchange traded U.S. equity securities.
Expense [Heading] rr_ExpenseHeading YOUR EXPENSES.
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. Investors may pay brokerage commissions on their purchases and sales of Fund shares, which are not reflected in the table or the examples below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (fees paid directly from your investment): None
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment):
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover.
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 examples, 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 Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Investors may pay brokerage commissions on their purchases and sales of Fund shares, which are not reflected in the table or the examples below.
Expense Example [Heading] rr_ExpenseExampleHeading EXAMPLE:
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The examples below are intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The examples assume that:

 

•       Your investment has a 5% return each year

 

•       The Fund's operating expenses remain the same

 

Your actual costs may be higher or lower. Based on these assumptions, for every $10,000 invested, you would pay the following expenses if you sell all of your shares at the end of each time period indicated:
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGY.
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund seeks to provide investment results that correspond to the total return performance of the Hartford Risk-Optimized Multifactor US Equity Index (LROUSLX) (the “Index”), which seeks to improve returns through a market cycle relative to traditional cap-weighted U.S. equity market indices and active U.S. equity market strategies.

 

The Index seeks to (1) lower concentration among individual stock exposures, and (2) enhance returns by improving the factor-attributes of the portfolio along the dimensions of value, quality, and momentum. The Index's components are risk- and factor-adjusted twice annually, with reconstitution and rebalance occurring in March and September. The Index was established with a base value of 1,000 on December 31, 2013. The components of the Index, and the degree to which these components represent certain industries, may change over time. Risk-Optimized refers to the approach Lattice Strategies LLC (“Lattice” or the “Adviser”) takes in the development and management of the Index. Each strategy index developed by Lattice seeks to address identified risks within its asset class. For example, country, company, and currency concentrations, valuation insensitivity, and other unmanaged risk factors may be addressed through the index management process. Risk-optimized does not mean “lower risk,” but rather refers to the deliberate and intentional re-allocation of specific risks.

 

The Adviser uses a “passive” or indexing approach to try to achieve the Fund's investment objective. Unlike many investment companies, the Fund does not try to “beat” the index it tracks and does not seek temporary defensive positions when markets decline or appear overvalued. Indexing may eliminate the chance that the Fund will substantially outperform the Index but also may reduce some of the risks of active management, such as over concentration. Indexing seeks to achieve lower costs and better after-tax performance by keeping portfolio turnover low in comparison to actively managed investment companies.

 

The Fund generally invests at least 80% of its assets in securities of the Index and in depositary receipts representing securities of the Index. The Fund may invest the remainder of its assets in certain instruments that are not included in the Index, cash and cash equivalents, including money market funds, as well as in securities that are not included in the Index, but that the sub-adviser believes will help the Fund track the Index. Under normal conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in equity securities of issuers of U.S. companies. To the extent that the Index concentrates (i.e., holds 25% or more of its total assets) in the securities of a particular industry or group of industries, the Fund will do so in approximately the same amount as the Index. The Fund may lend securities representing up to one-third of the value of the Fund's total assets (including the value of the collateral received) in accordance with the Fund's securities lending program and guidelines.

 

The Index is sponsored by Lattice. Lattice determines the composition and relative weightings of the securities in the Index and publishes information regarding the market value of the Index. The Index is calculated and distributed by Solactive AG. Additional information on the Index can be found at www.hartfordfunds.com.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS.
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The principal risks of investing in the Fund are described below. 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. 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. As with any fund, there is no guarantee that the Fund will achieve its investment objective. For more information regarding risks and investment matters please see “Additional Information Regarding Investment Strategies and Risks” in the Fund's statutory prospectus.

 

Index Tracking Risk - While the Fund seeks to track the performance of the Index as closely as possible (i.e., achieve a high degree of correlation with the Index), the Fund's return may not match or achieve a high degree of correlation with the return of the Index due to operating expenses, transaction costs, cash flows, regulatory requirements and operational inefficiencies.

 

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.

 

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.

 

Issuer Risk - Fund performance depends on the performance of individual securities to which the Fund has exposure. Changes in the financial condition or credit rating of an issuer of those securities may cause the value of the securities to decline.

 

Large Cap Securities Risk - Returns on investments in stocks of large U.S. companies could trail the returns on investments in stocks of smaller and mid-sized companies.

 

Small Cap Securities Risk - Investments in small capitalization companies involve greater risks than investments in larger, more established companies. Many of these companies are young and have limited operating or business history. These securities may be subject to more abrupt or erratic price movements and may lack sufficient market liquidity, and these issuers often face greater business risks, including the risk of bankruptcy.

 

Market Price Risk - The net asset value (“NAV”) of the Fund's shares and the value of your investment may fluctuate. The market prices of the Fund's shares will generally fluctuate in accordance with changes in NAV, changes in the intraday value of the Fund's holdings, as well as the relative supply of and demand for the shares on the Fund's listing exchange. Although it is expected that the Fund's shares will remain listed on an exchange, disruptions to creations and redemptions, the existence of market volatility or lack of an active trading market for the shares (including through a trading halt), as well as other factors, may result in the shares trading significantly above (at a premium to) or below (at a discount to) the Fund's NAV or the intraday value of the Fund's holdings. During such periods, you may be unable to sell your shares or may incur significant losses if you sell your shares. There are various methods by which investors can purchase and sell shares and various types of orders that may be placed. Investors should consult their financial intermediary before purchasing or selling shares of the Fund. Neither the Adviser nor the Fund's sub-adviser can predict whether the Fund's shares will trade below, at or above their NAV. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for the Fund's shares will be closely related to, but not identical to, the same forces influencing the prices of the Fund's holdings trading individually or in the aggregate at any point in time. There can be no assurance as to whether and/or to what extent a Fund's shares will trade at premiums or discounts to NAV or to the intraday value of the Fund's holdings.

 

Passive Strategy/Index Risk - The Fund is managed with a passive investment strategy, attempting to track the performance of an unmanaged index of securities. This differs from an actively managed fund, which typically seeks to outperform a benchmark index. As a result, the Fund may hold constituent securities of the Index regardless of the current or projected performance of a specific security or a particular industry or market sector. Maintaining investments in securities regardless of market conditions or the performance of individual securities could cause the Fund's return to be lower than if the Fund employed an active strategy.

 

Index Related Risk - The Fund seeks to achieve a return that corresponds generally to the total return performance, before fees and expenses, of the Index as published by Lattice. There is no assurance that Lattice will compile the Index accurately, or that the Index will be determined, composed or calculated accurately. While Lattice does provide descriptions of what the Index is designed to achieve, Lattice does not provide any warranty or accept any liability in relation to the quality, accuracy or completeness of data in respect of the Index it publishes, and does not guarantee that the Index will be in line with Lattice's described index methodology. The mandate of the Adviser and sub-adviser, as described in this Prospectus, is to manage the Fund consistently with its respective Index. Errors in respect of the quality, accuracy and completeness of the data may occur from time to time and may not be identified and corrected for a period of time, particularly where an index is less commonly used. Therefore, gains, losses or costs associated with the Index's errors will generally be borne by the Fund and its shareholders. For example, during a period where the Fund's Index contains incorrect constituents, the Fund would have market exposure to such constituents and would be underexposed to the Index's other constituents. As such, errors may result in a negative or positive performance impact to the Fund and its shareholders. Shareholders should understand that any gains from Index errors will be kept by the Fund and its shareholders and any losses will be borne by the Fund and its shareholders.

 

Apart from scheduled rebalances, Lattice may also carry out additional ad hoc rebalances to the Index in order, for example, to correct an error in the selection of index constituents. Where the Fund's Index is rebalanced and the Fund in turn rebalances its portfolio to ring it in line with its Index, any transaction costs and market exposure arising from such portfolio rebalancing will be borne directly by the Fund and its shareholders. Unscheduled rebalances to the Index may also expose the Fund to tracking error risk, which is the risk that its returns may not track exactly those of the Fund's Index. Therefore, errors and additional ad hoc rebalances carried out by Lattice with respect to the Index may increase the costs and market exposure risk of the Fund.

 

Industry Concentration Risk - Although the Fund generally will not invest 25% or more of the value of the Fund's total assets in the securities of one or more issuers conducting their principal business activities in the same industry or group of industries, to the extent that the Index is concentrated in a particular industry, the Fund will concentrate its investments to approximately the same degree as its Index. If the Fund focuses its investments in a specific industry or group of industries, the Fund is subject to the risk that (1) its performance will be closely tied to the performance of those particular industries; (2) its performance will be adversely impacted when such industries experience a downturn; and (3) it will perform poorly during a slump in demand for securities of companies in such industries. As a result, the Fund may be subject to increased price volatility and may be more susceptible to adverse developments in an industry than a fund that does not focus its investments in any industry.

 

Authorized Participant Concentration Risk - Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of intermediaries that act as authorized participants, and none of these authorized participants are or will be obligated to engage in creation or redemption transactions. To the extent that these intermediaries exit the business or are unable to or choose not to proceed with creation and/or redemption orders with respect to the Fund and no other authorized participant is able to step forward to create or redeem, Fund shares may be more likely to trade at a discount to NAV and possibly face trading halts and/or delisting.

 

Securities Lending Risk - The Fund may engage in securities lending. Securities lending involves the risk that the Fund may lose money because the borrower of the loaned securities fails to return the securities in a timely manner or at all. The Fund could also lose money in the event of a decline in the value of the collateral provided for loaned securities or a decline in the value of any investments made with cash collateral. These events could also trigger adverse tax consequences for the Fund.

 

Valuation Risk - The sale price the Fund could receive for a security may differ from the Fund's valuation of the security and may differ from the value used by the Index, particularly for securities that trade in low volume or volatile markets or that are valued using a fair value methodology. In addition, the value of the securities in the Fund's portfolio may change on days when shareholders will not be able to purchase or sell the Fund's shares.

 

The Fund is subject to certain other risks, which are discussed in “Additional Information Regarding Investment Strategies and Risks” in the Fund's statutory prospectus.
Risk Lose Money [Text] rr_RiskLoseMoney 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.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PAST PERFORMANCE.
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The performance information below indicates the risks of investing in the Fund. Keep in mind that past performance does not indicate future results. Updated performance information is available at www.hartfordfunds.com. The bar chart shows the Fund's performance for each calendar year since the Fund's inception. The table shows how the Fund's average annual total returns for different periods compare to the returns of the Index and another broad measure of market performance. After-tax returns are calculated using the historical highest individual U.S. federal marginal income tax rates and do not reflect the impact of state and local taxes. In some instances, the “Return After Taxes on Distributions and Sale of Fund Shares” may be greater than “Return Before Taxes” because the investor is assumed to be able to use the capital loss from the sale of Fund shares to offset other taxable gains. 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. Updated performance information is available by calling 1-415-315-6600 or visiting our website at www.hartfordfunds.com.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-415-315-6600
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.hartfordfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Keep in mind that past performance does not indicate future results.
Bar Chart [Heading] rr_BarChartHeading Total returns by calendar year
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest/Lowest quarterly results during the periods shown in the bar chart were:

Highest 8.65% (4th quarter, 2017)   Lowest -15.09% (4th quarter, 2018)
Performance Table Heading rr_PerformanceTableHeading Average annual total returns for the periods ending December 31, 2018
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual U.S. federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred 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.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are calculated using the historical highest individual U.S. federal marginal income tax rates and do not reflect the impact of state and local taxes.
Hartford Multifactor US Equity ETF | Hartford Risk-Optimized Multifactor US Equity Index  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Hartford Risk-Optimized Multifactor US Equity Index
1 Year rr_AverageAnnualReturnYear01 (8.83%)
Since Lifetime rr_AverageAnnualReturnSinceInception 4.94%
Lifetime Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2015
Hartford Multifactor US Equity ETF | MSCI USA Index (Gross) (reflects no deduction for fees, expenses or other taxes)  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel MSCI USA Index (Gross) (reflects no deduction for fees, expenses or other taxes)
1 Year rr_AverageAnnualReturnYear01 (4.50%)
Since Lifetime rr_AverageAnnualReturnSinceInception 6.50%
Lifetime Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2015
Hartford Multifactor US Equity ETF | Hartford Multifactor US Equity ETF  
Risk/Return: rr_RiskReturnAbstract  
Management fees rr_ManagementFeesOverAssets 0.19% [1]
Distribution and service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets none
Total annual fund operating expenses rr_ExpensesOverAssets 0.19% [2]
Year 1 rr_ExpenseExampleYear01 $ 19
Year 3 rr_ExpenseExampleYear03 61
Year 5 rr_ExpenseExampleYear05 107
Year 10 rr_ExpenseExampleYear10 $ 243
2016 rr_AnnualReturn2016 11.34%
2017 rr_AnnualReturn2017 22.58%
2018 rr_AnnualReturn2018 (8.97%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2017
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.65%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (15.09%)
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (8.97%)
Since Lifetime rr_AverageAnnualReturnSinceInception 4.75%
Lifetime Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2015
Hartford Multifactor US Equity ETF | Hartford Multifactor US Equity ETF | Return After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions
1 Year rr_AverageAnnualReturnYear01 (9.38%)
Since Lifetime rr_AverageAnnualReturnSinceInception 4.28%
Lifetime Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2015
Hartford Multifactor US Equity ETF | Hartford Multifactor US Equity ETF | Return After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
Label rr_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
1 Year rr_AverageAnnualReturnYear01 (5.04%)
Since Lifetime rr_AverageAnnualReturnSinceInception 3.64%
Lifetime Date rr_AverageAnnualReturnInceptionDate Feb. 25, 2015
[1] "Management fees" have been restated to reflect current fees.
[2] "Total annual fund operating expenses" do not correlate to the ratio of expenses to average net assets that is disclosed in the Fund's annual report in the financial highlights table, which reflects the operating expenses of the Fund and does not include the restated "Management Fees."