Label

Element

Value

Risk/Return:

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Entity Central Index Key

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0001605803

Hartford Multifactor Global Small Cap ETF

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

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Hartford Multifactor Global Small Cap ETF Summary Section

Objective [Heading]

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INVESTMENT OBJECTIVE.

Objective, Primary [Text Block]

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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 small capitalization exchange traded equity securities.

Expense [Heading]

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YOUR EXPENSES.

Expense Narrative [Text Block]

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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]

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SHAREHOLDER FEES (fees paid directly from your investment): None

Operating Expenses Caption [Text]

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ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment):

Portfolio Turnover [Heading]

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Portfolio Turnover.

Portfolio Turnover [Text Block]

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The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 41% of the average value of its portfolio.

Portfolio Turnover, Rate

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41.00%

Expense Exchange Traded Fund Commissions [Text]

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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]

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EXAMPLE:

Expense Example Narrative [Text Block]

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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]

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PRINCIPAL INVESTMENT STRATEGY.

Strategy Narrative [Text Block]

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The Fund seeks to provide investment results that correspond to the total return performance of the Hartford Risk-Optimized Multifactor Global Small Cap Index (LROGSX) (the “Index”), which is designed to address risks and opportunities within the global small cap universe by selecting equity securities of companies exhibiting a favorable combination of factor characteristics, including valuation, momentum, and quality. The Index seeks to outperform a capitalization-weighted universe of global small capitalization equity securities over a complete market cycle with up to 15% less volatility.

The Index is built with a rules-based, proprietary methodology, which employs a multi-layered risk-controlled approach that seeks to address the active risks versus the cap-weighted universe, accounting for country, liquidity and volatility risks. Specifically, the Index seeks to select companies exhibiting attractive risk premium profiles while managing overall volatility levels and active risks. 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 capitalization range of the Index was $231 million to $12 billion as of December 31, 2018. 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 poor security selection. 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 derivative instruments that may not be 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 securities of small capitalization companies. Under normal conditions, at least 40% of the Fund's holdings will be securities (i) issued by issuers organized or located outside the U.S., (ii) issuers which primarily trade in market located outside the U.S., (iii) issuers doing a substantial amount of business outside the U.S. or (iv) issuers that have at least 50% of their sales or assets outside the U.S. 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. 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 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]

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PRINCIPAL RISKS.

Risk Narrative [Text Block]

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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.

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.

Foreign Investments Risk - Investments in foreign securities may be riskier than investments in U.S. securities. Differences between the U.S. and foreign regulatory regimes and securities markets, including the less stringent investor protection 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. Certain European countries in which the Fund may invest have recently experienced significant volatility in financial markets and may continue to do so in the future. The impact of the United Kingdom's intended departure from the European Union, commonly known as “Brexit,” and the potential departure of one or more other countries from the European Union may have significant political and financial consequences for global markets. This may adversely impact Fund performance.

Emerging Markets Risk - The risks related to investing in foreign securities are generally greater with respect to investments in companies that conduct their principal business activities in emerging markets or whose securities are traded principally on exchanges in emerging markets. The risks of investing in emerging markets include risks of illiquidity, increased price volatility, smaller market capitalizations, less government regulation, less extensive and less frequent accounting, financial and other reporting requirements, significant delays in settlement of trades, risk of loss resulting from problems in share registration and custody and substantial economic and political disruptions. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid, and as a result, the risks of investing in emerging markets are magnified in frontier markets.

Currency Risk - The risk that the value of the Fund's investments in foreign securities or currencies will be affected by the value of the applicable currency relative to the U.S. dollar. When the Fund sells a foreign currency or foreign currency denominated security, its value may be worth less in U.S. dollars even if the investment increases in value in its local market. U.S. dollar-denominated securities of foreign issuers may also be affected by currency risk, as the revenue earned by issuers of these securities may also be affected by changes in the issuer's local currency.

Geographic Risk - A natural or other disaster could occur in a geographic region in which the Fund invests, which could affect the economy or particular business operations of companies in the specific geographic region, causing an adverse impact on the Fund's investments in the affected region.

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.

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 bring 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]

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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]

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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]

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PAST PERFORMANCE.

Performance Narrative [Text Block]

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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]

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1-415-315-6600

Performance Availability Website Address [Text]

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www.hartfordfunds.com

Performance Past Does Not Indicate Future [Text]

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Keep in mind that past performance does not indicate future results.

Bar Chart [Heading]

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Total returns by calendar year

Bar Chart Closing [Text Block]

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

Highest 7.56% (3rd quarter, 2016)   Lowest -13.58% (4th quarter, 2018)

Performance Table Heading

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Average annual total returns for the periods ending December 31, 2018

Performance Table Uses Highest Federal Rate

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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

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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]

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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 Global Small Cap ETF | Hartford Risk-Optimized Multifactor Global Small Cap Index

Risk/Return:

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Label

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Hartford Risk-Optimized Multifactor Global Small Cap Index

1 Year

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(11.65%)

Since Lifetime

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5.20%

Lifetime Date

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Mar. 23, 2015

Hartford Multifactor Global Small Cap ETF | MSCI All Country World (ACWI) Small Cap Index (Net) (reflects no deduction for fees, expenses or other taxes)

Risk/Return:

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Label

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MSCI All Country World (ACWI) Small Cap Index (Net) (reflects no deduction for fees, expenses or other taxes)

1 Year

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(14.39%)

Since Lifetime

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2.82%

Lifetime Date

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Mar. 23, 2015

Hartford Multifactor Global Small Cap ETF | Hartford Multifactor Global Small Cap ETF

Risk/Return:

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Management fees

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0.39%

^[1]

Distribution and service (12b-1) fees

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none

Other expenses

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none

Total annual fund operating expenses

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0.39%

^[2]

Year 1

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$ 40

Year 3

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125

Year 5

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219

Year 10

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$ 493

2016

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15.37%

2017

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23.64%

2018

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(11.87%)

Highest Quarterly Return, Label

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Highest

Highest Quarterly Return, Date

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Sep. 30, 2016

Highest Quarterly Return

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7.56%

Lowest Quarterly Return, Label

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Lowest

Lowest Quarterly Return, Date

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Dec. 31, 2018

Lowest Quarterly Return

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(13.58%)

Label

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Return Before Taxes

1 Year

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(11.87%)

Since Lifetime

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4.65%

Lifetime Date

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Mar. 23, 2015

Hartford Multifactor Global Small Cap ETF | Hartford Multifactor Global Small Cap ETF | Return After Taxes on Distributions

Risk/Return:

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Label

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Return After Taxes on Distributions

1 Year

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(12.42%)

Since Lifetime

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3.94%

Lifetime Date

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Mar. 23, 2015

Hartford Multifactor Global Small Cap ETF | Hartford Multifactor Global Small Cap ETF | Return After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

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Label

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Return After Taxes on Distributions and Sale of Fund Shares

1 Year

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(6.59%)

Since Lifetime

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3.49%

Lifetime Date

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Mar. 23, 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."