v3.25.2
Shareholder Report
 6 Months Ended
Apr. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Harbor ETF Trust
Entity Central Index Key 0001860434
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2025
C000252180  
Shareholder Report [Line Items]  
Fund Name Harbor Active Small Cap ETF
Trading Symbol Ticker: SMLL
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Active Small Cap ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Active Small Cap ETF
$39
0.80%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.80%
AssetsNet $ 14,716,000
Holdings Count | Holding 49
Advisory Fees Paid, Amount $ 49,000
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$14,716
Number of Investments
49
Total Net Advisory Fees Paid (in thousands)
$49
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Industrials
32.2%
Financials
28.0%
Health Care
7.8%
Real Estate
6.3%
Consumer Discretionary
6.2%
Materials
6.0%
Energy
4.4%
Consumer Staples
4.0%
Information Technology
3.4%
Utilities
1.3%
Communication Services
0.4%
C000252171  
Shareholder Report [Line Items]  
Fund Name Harbor AlphaEdge™ Large Cap Value ETF
Trading Symbol Ticker: VLLU
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor AlphaEdge™ Large Cap Value ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor AlphaEdge™ Large Cap Value ETF
$12
0.25%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 12
Expense Ratio, Percent 0.25%
AssetsNet $ 2,014,000
Holdings Count | Holding 73
Advisory Fees Paid, Amount $ 3,000
InvestmentCompanyPortfolioTurnover 46.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$2,014
Number of Investments
73
Total Net Advisory Fees Paid (in thousands)
$3
Portfolio Turnover Rate
46%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Financials
28.2%
Consumer Staples
18.9%
Energy
11.8%
Consumer Discretionary
10.1%
Communication Services
8.4%
Information Technology
8.2%
Health Care
7.1%
Industrials
4.8%
Utilities
1.9%
Materials
0.6%
C000252172  
Shareholder Report [Line Items]  
Fund Name Harbor AlphaEdge™ Next Generation REITs ETF
Trading Symbol Ticker: AREA
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor AlphaEdge™ Next Generation REITs ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor AlphaEdge™ Next Generation REITs ETF
$24
0.50%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.50%
AssetsNet $ 1,806,000
Holdings Count | Holding 41
Advisory Fees Paid, Amount $ 5,000
InvestmentCompanyPortfolioTurnover 30.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$1,806
Number of Investments
41
Total Net Advisory Fees Paid (in thousands)
$5
Portfolio Turnover Rate
30%
Holdings [Text Block]

Industry Allocation (% of Investments)

Group By Country Chart
Value
Value
Specialized REITs
55.8%
Health Care REITs
26.7%
Hotel & Resort REITs
13.6%
Residential REITs
3.9%
C000250794  
Shareholder Report [Line Items]  
Fund Name Harbor AlphaEdge™ Small Cap Earners ETF
Trading Symbol Ticker: EBIT
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor AlphaEdge™ Small Cap Earners ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor AlphaEdge™ Small Cap Earners ETF
$14
0.29%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.29%
AssetsNet $ 9,297,000
Holdings Count | Holding 837
Advisory Fees Paid, Amount $ 12,000
InvestmentCompanyPortfolioTurnover 22.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$9,297
Number of Investments
837
Total Net Advisory Fees Paid (in thousands)
$12
Portfolio Turnover Rate
22%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Financials
30.3%
Industrials
15.0%
Consumer Discretionary
13.6%
Energy
10.2%
Real Estate
6.3%
Materials
4.9%
Information Technology
4.7%
Communication Services
4.2%
Health Care
4.1%
Consumer Staples
3.4%
Utilities
3.3%
C000234046  
Shareholder Report [Line Items]  
Fund Name Harbor Commodity All-Weather Strategy ETF (Consolidated)
Trading Symbol Ticker: HGER
Security Exchange Name NYSE
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Commodity All-Weather Strategy ETF (Consolidated) ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Commodity All-Weather Strategy ETF (Consolidated)
$35
0.68%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.68%
AssetsNet $ 302,273,000
Holdings Count | Holding 8
Advisory Fees Paid, Amount $ 938,000
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$302,273
Number of Investments (includes derivatives)
8
Total Net Advisory Fees Paid (in thousands)
$938
Portfolio Turnover Rate (not applicable due to the nature of the Fund's investments)
-%
Holdings [Text Block]

Risk AllocationFootnote Reference* (% of Net Assets)

Commodities Sector

Petroleum
32.9%
Precious Metals
31.3%
Grains and Soybean Products
15.2%
Softs
10.6%
Base Metals
7.9%
Livestock
2.1%
FootnoteDescription
Footnote*
Based on notional value and represents the sector allocation of the Quantix Commodity Index.
C000249125  
Shareholder Report [Line Items]  
Fund Name Harbor Disciplined Bond ETF
Trading Symbol Ticker: AGGS
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Disciplined Bond ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Disciplined Bond ETF
$18
0.35%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 18
Expense Ratio, Percent 0.35%
AssetsNet $ 27,736,000
Holdings Count | Holding 203
Advisory Fees Paid, Amount $ 48,000
InvestmentCompanyPortfolioTurnover 13.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$27,736
Number of Investments
203
Total Net Advisory Fees Paid (in thousands)
$48
Portfolio Turnover Rate
13%
Holdings [Text Block]

Investment Allocation (% of Investments)

Group By Country Chart
Value
Value
Corporate Bonds & Notes
30.5%
Mortgage Pass-Through
26.8%
U.S. Government Obligations
19.2%
Asset-Backed Securities
12.6%
Collateralized Mortgage Obligations
10.5%
Municipal Bonds
0.4%
C000235263  
Shareholder Report [Line Items]  
Fund Name Harbor Dividend Growth Leaders ETF
Trading Symbol Ticker: GDIV
Security Exchange Name NYSE
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Dividend Growth Leaders ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Dividend Growth Leaders ETF
$24
0.50%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.50%
AssetsNet $ 233,945,000
Holdings Count | Holding 43
Advisory Fees Paid, Amount $ 668,000
InvestmentCompanyPortfolioTurnover 40.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$233,945
Number of Investments
43
Total Net Advisory Fees Paid (in thousands)
$668
Portfolio Turnover Rate
40%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Financials
24.3%
Information Technology
19.6%
Consumer Discretionary
13.0%
Health Care
10.4%
Industrials
9.3%
Consumer Staples
8.2%
Communication Services
5.8%
Real Estate
3.2%
Energy
2.8%
Utilities
2.0%
Materials
1.4%
C000238718  
Shareholder Report [Line Items]  
Fund Name Harbor Health Care ETF
Trading Symbol Ticker: MEDI
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Health Care ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Health Care ETF
$39
0.80%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.80%
AssetsNet $ 15,679,000
Holdings Count | Holding 35
Advisory Fees Paid, Amount $ 65,000
InvestmentCompanyPortfolioTurnover 92.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$15,679
Number of Investments
35
Total Net Advisory Fees Paid (in thousands)
$65
Portfolio Turnover Rate
92%
Holdings [Text Block]

Industry Allocation (% of Investments)

Group By Country Chart
Value
Value
Biotechnology
49.9%
Health Care Equipment & Supplies
22.4%
Pharmaceuticals
15.8%
Health Care Providers & Services
9.7%
Life Sciences Tools & Services
2.2%
C000234331  
Shareholder Report [Line Items]  
Fund Name Harbor Human Capital Factor Unconstrained ETF
Trading Symbol Ticker: HAPY
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Human Capital Factor Unconstrained ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Human Capital Factor Unconstrained ETF
$24
0.50%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.50%
AssetsNet $ 3,320,000
Holdings Count | Holding 74
Advisory Fees Paid, Amount $ 19,000
InvestmentCompanyPortfolioTurnover 30.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$3,320
Number of Investments
74
Total Net Advisory Fees Paid (in thousands)
$19
Portfolio Turnover Rate
30%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Information Technology
28.7%
Financials
24.1%
Health Care
12.0%
Industrials
6.5%
Real Estate
5.4%
Materials
5.3%
Consumer Staples
4.7%
Energy
3.9%
Communication Services
3.8%
Utilities
3.0%
Consumer Discretionary
2.6%
C000238211  
Shareholder Report [Line Items]  
Fund Name Harbor Human Capital Factor US Large Cap ETF
Trading Symbol Ticker: HAPI
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Human Capital Factor US Large Cap ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Human Capital Factor US Large Cap ETF
$17
0.35%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.35%
AssetsNet $ 356,048,000
Holdings Count | Holding 151
Advisory Fees Paid, Amount $ 646,000
InvestmentCompanyPortfolioTurnover 28.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$356,048
Number of Investments
151
Total Net Advisory Fees Paid (in thousands)
$646
Portfolio Turnover Rate
28%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Information Technology
25.7%
Financials
15.4%
Communication Services
14.9%
Health Care
10.9%
Consumer Discretionary
10.4%
Industrials
7.5%
Consumer Staples
6.2%
Energy
2.8%
Utilities
2.6%
Real Estate
2.1%
Materials
1.5%
C000241449  
Shareholder Report [Line Items]  
Fund Name Harbor Human Capital Factor US Small Cap ETF
Trading Symbol Ticker: HAPS
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Human Capital Factor US Small Cap ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Human Capital Factor US Small Cap ETF
$28
0.60%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.60%
AssetsNet $ 117,928,000
Holdings Count | Holding 197
Advisory Fees Paid, Amount $ 395,000
InvestmentCompanyPortfolioTurnover 63.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$117,928
Number of Investments
197
Total Net Advisory Fees Paid (in thousands)
$395
Portfolio Turnover Rate
63%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Financials
21.3%
Health Care
18.0%
Industrials
16.5%
Consumer Discretionary
14.8%
Information Technology
12.2%
Real Estate
6.3%
Materials
2.7%
Utilities
2.4%
Energy
2.2%
Communication Services
2.1%
Consumer Staples
1.5%
C000237253  
Shareholder Report [Line Items]  
Fund Name Harbor International Compounders ETF
Trading Symbol Ticker: OSEA
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor International Compounders ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor International Compounders ETF
$27
0.55%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.55%
AssetsNet $ 428,089,000
Holdings Count | Holding 29
Advisory Fees Paid, Amount $ 839,000
InvestmentCompanyPortfolioTurnover 1.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$428,089
Number of Investments
29
Total Net Advisory Fees Paid (in thousands)
$839
Portfolio Turnover Rate
1%
Holdings [Text Block]

Region Breakdown (% of Investments)

Group By Country Chart
Value
Value
Europe
56.4%
Pacific Basin
24.8%
North America
12.7%
South Asia
6.1%

Country Breakdown (% of Investments)

United Kingdom
15.9%
Germany
15.1%
Japan
14.9%
United States
12.7%
France
11.5%
Sweden
8.1%
India
6.1%
Taiwan
4.2%
Denmark
3.3%
Hong Kong
3.2%
Indonesia
2.5%
Netherlands
2.5%
C000244492  
Shareholder Report [Line Items]  
Fund Name Harbor Long-Short Equity ETF
Trading Symbol Ticker: LSEQ
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Long-Short Equity ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Long-Short Equity ETF
$128
2.53%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 128
Expense Ratio, Percent 2.53%
AssetsNet $ 20,221,000
Holdings Count | Holding 147
Advisory Fees Paid, Amount $ 121,000
InvestmentCompanyPortfolioTurnover 149.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$20,221
Number of Investments
147
Total Net Advisory Fees Paid (in thousands)
$121
Portfolio Turnover Rate
149%
Holdings [Text Block]

Sector Allocation (% of Investments)

Information Technology
21.2%
Health Care
18.1%
Consumer Discretionary
15.7%
Utilities
9.6%
Communication Services
8.7%
Materials
7.2%
Energy
6.3%
Consumer Staples
5.6%
Industrials
4.1%
Financials
3.5%

Sector Allocation (% of Investments Sold Short)

Health Care
22.3%
Energy
21.7%
Information Technology
20.5%
Consumer Discretionary
18.3%
Communication Services
7.8%
Industrials
7.1%
Materials
2.3%
C000233998  
Shareholder Report [Line Items]  
Fund Name Harbor Long-Term Growers ETF
Trading Symbol Ticker: WINN
Security Exchange Name NYSE
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Long-Term Growers ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Long-Term Growers ETF
$28
0.57%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.57%
AssetsNet $ 749,073,000
Holdings Count | Holding 72
Advisory Fees Paid, Amount $ 1,937,000
InvestmentCompanyPortfolioTurnover 28.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$749,073
Number of Investments
72
Total Net Advisory Fees Paid (in thousands)
$1,937
Portfolio Turnover Rate
28%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Information Technology
37.6%
Communication Services
17.5%
Consumer Discretionary
15.7%
Health Care
10.4%
Financials
8.2%
Industrials
5.0%
Consumer Staples
4.2%
Real Estate
0.6%
Energy
0.5%
Utilities
0.3%
C000243340  
Shareholder Report [Line Items]  
Fund Name Harbor Multi-Asset Explorer ETF (Consolidated)
Trading Symbol Ticker: MAPP
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Multi-Asset Explorer ETF (Consolidated) ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Multi-Asset Explorer ETF (Consolidated)
$35
0.70%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.70%
AssetsNet $ 5,177,000
Holdings Count | Holding 19
Advisory Fees Paid, Amount $ 16,000
InvestmentCompanyPortfolioTurnover 62.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$5,177
Number of Investments
19
Total Net Advisory Fees Paid (in thousands)
$16
Portfolio Turnover Rate
62%
Holdings [Text Block]

Investment Allocation (% of Investments)

Group By Country Chart
Value
Value
Equity Funds
61.0%
Fixed Income Funds
25.7%
Commodity Funds
13.3%
C000255316  
Shareholder Report [Line Items]  
Fund Name Harbor Osmosis Emerging Markets Resource Efficient ETF
Trading Symbol Ticker: EFFE
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Osmosis Emerging Markets Resource Efficient ETF ("Fund") for the period of December 18, 2024 (commencement of operations) to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investmentFootnote Reference*
Costs paid as a percentage of a $10,000 investmentFootnote Reference†
Harbor Osmosis Emerging Markets Resource Efficient ETF
$26
0.69%
FootnoteDescription
Footnote*
The Fund has less than half a year of operations. Expenses would be higher if the Fund operated for the full period.
Footnote†
Annualized
Expenses Paid, Amount $ 26
Expense Ratio, Percent 0.69%
AssetsNet $ 107,192,000
Holdings Count | Holding 81
Advisory Fees Paid, Amount $ 166,000
InvestmentCompanyPortfolioTurnover 67.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$107,192
Number of Investments
81
Total Net Advisory Fees Paid (in thousands)
$166
Portfolio Turnover Rate
67%
Holdings [Text Block]

Region Breakdown (% of Investments)

Group By Country Chart
Value
Value
Pacific Basin
60.2%
South Asia
19.1%
Middle East/Central Asia
7.0%
South America
5.6%
Africa
3.1%
Europe
2.9%
Latin America
2.0%
North America
0.1%

Country Breakdown (% of Investments)

China
29.7%
India
19.1%
Taiwan
16.9%
South Korea
9.5%
Brazil
4.6%
Saudi Arabia
3.9%
South Africa
3.0%
Other
13.3%
C000255317  
Shareholder Report [Line Items]  
Fund Name Harbor Osmosis International Resource Efficient ETF
Trading Symbol Ticker: EFFI
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Osmosis International Resource Efficient ETF ("Fund") for the period of December 11, 2024 (commencement of operations) to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investmentFootnote Reference*
Costs paid as a percentage of a $10,000 investmentFootnote Reference†
Harbor Osmosis International Resource Efficient ETF
$22
0.55%
FootnoteDescription
Footnote*
The Fund has less than half a year of operations. Expenses would be higher if the Fund operated for the full period.
Footnote†
Annualized
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.55%
AssetsNet $ 117,448,000
Holdings Count | Holding 77
Advisory Fees Paid, Amount $ 202,000
InvestmentCompanyPortfolioTurnover 31.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$117,448
Number of Investments
77
Total Net Advisory Fees Paid (in thousands)
$202
Portfolio Turnover Rate
31%
Holdings [Text Block]

Region Breakdown (% of Investments)

Group By Country Chart
Value
Value
Europe
55.5%
Pacific Basin
30.9%
North America
12.4%
Latin America
1.2%

Country Breakdown (% of Investments)

Japan
20.6%
United Kingdom
11.1%
Canada
10.2%
France
9.4%
Germany
9.3%
Australia
7.2%
Switzerland
5.6%
Sweden
4.4%
Italy
3.5%
Ireland
2.8%
Other
15.9%
C000254050  
Shareholder Report [Line Items]  
Fund Name Harbor PanAgora Dynamic Large Cap Core ETF
Trading Symbol Ticker: INFO
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor PanAgora Dynamic Large Cap Core ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor PanAgora Dynamic Large Cap Core ETF
$17
0.35%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 17
Expense Ratio, Percent 0.35%
AssetsNet $ 63,712,000
Holdings Count | Holding 118
Advisory Fees Paid, Amount $ 79,000
InvestmentCompanyPortfolioTurnover 22.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$63,712
Number of Investments
118
Total Net Advisory Fees Paid (in thousands)
$79
Portfolio Turnover Rate
22%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Information Technology
30.2%
Financials
15.7%
Health Care
9.7%
Communication Services
9.3%
Consumer Discretionary
8.7%
Industrials
8.1%
Consumer Staples
7.6%
Utilities
3.7%
Materials
2.9%
Energy
2.9%
Real Estate
1.2%
C000228888  
Shareholder Report [Line Items]  
Fund Name Harbor Scientific Alpha High-Yield ETF
Trading Symbol Ticker: SIHY
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Scientific Alpha High-Yield ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Scientific Alpha High-Yield ETF
$24
0.48%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 24
Expense Ratio, Percent 0.48%
AssetsNet $ 172,926,000
Holdings Count | Holding 291
Advisory Fees Paid, Amount $ 393,000
InvestmentCompanyPortfolioTurnover 19.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$172,926
Number of Investments
291
Total Net Advisory Fees Paid (in thousands)
$393
Portfolio Turnover Rate
19%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Consumer Discretionary
21.9%
Industrials
15.7%
Energy
15.2%
Financials
11.7%
Communication Services
10.1%
Consumer Staples
5.9%
Information Technology
5.9%
Materials
4.7%
Health Care
3.8%
Utilities
3.0%
Real Estate
2.1%
C000228889  
Shareholder Report [Line Items]  
Fund Name Harbor Scientific Alpha Income ETF
Trading Symbol Ticker: SIFI
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Scientific Alpha Income ETF ("Fund") for the period of November 1, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investmentFootnote Reference*
Harbor Scientific Alpha Income ETF
$25
0.50%
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 25
Expense Ratio, Percent 0.50%
AssetsNet $ 33,528,000
Holdings Count | Holding 177
Advisory Fees Paid, Amount $ 83,000
InvestmentCompanyPortfolioTurnover 26.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$33,528
Number of Investments (includes derivatives)
177
Total Net Advisory Fees Paid (in thousands)
$83
Portfolio Turnover Rate
26%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Information Technology
17.2%
Industrials
15.6%
Consumer Discretionary
13.1%
Energy
12.3%
Communication Services
11.8%
Consumer Staples
9.2%
Financials
7.7%
Materials
5.8%
Health Care
5.4%
Utilities
1.6%
Real Estate
0.3%
C000259354  
Shareholder Report [Line Items]  
Fund Name Harbor Transformative Technologies ETF
Trading Symbol Ticker: TEC
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Harbor Transformative Technologies ETF ("Fund") for the period of April 16, 2025 (commencement of operations) to April 30, 2025.
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
Additional Information [Text Block] You can find additional information about the Fund at www.harborcapital.com/documents/fund. You can also request this information by contacting us at 800-422-1050.
Additional Information Phone Number 800-422-1050
Additional Information Website <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 12.8px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.harborcapital.com/documents/fund</span>
Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Fund Name
Costs of a $10,000 investmentFootnote Reference*
Costs paid as a percentage of a $10,000 investmentFootnote Reference†
Harbor Transformative Technologies ETF
$3
0.69%
FootnoteDescription
Footnote*
The Fund has less than half a year of operations. Expenses would be higher if the Fund operated for the full period.
Footnote†
Annualized
Expenses Paid, Amount $ 3
Expense Ratio, Percent 0.69%
AssetsNet $ 3,727,000
Holdings Count | Holding 43
Advisory Fees Paid, Amount $ 1,000
InvestmentCompanyPortfolioTurnover 1.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets (in thousands)
$3,727
Number of Investments
43
Total Net Advisory Fees Paid (in thousands)
$1
Portfolio Turnover Rate
1%
Holdings [Text Block]

Sector Allocation (% of Investments)

Group By Country Chart
Value
Value
Information Technology
65.4%
Communication Services
13.5%
Health Care
9.2%
Consumer Discretionary
8.6%
Financials
1.5%
Industrials
1.0%
Utilities
0.8%