v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Baillie Gifford ETF Trust
Entity Central Index Key 0002060280
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
C000269507  
Shareholder Report [Line Items]  
Fund Name Baillie Gifford Emerging Markets ETF
Class Name The Nasdaq Stock Market LLC
Trading Symbol BGEG
Annual or Semi-Annual Statement [Text Block] The semi-annual shareholder report contains important information about  Baillie Gifford Emerging Markets ETF (the "Fund") for the period of June 2, 2026 (commencement of operations) to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at www.bailliegifford.com/emerging-markets-etf/TSR . You can also request this information by contacting us at +1-844-394-6127 or via email at northamericanvehiclesteam@bailliegifford.com.    
Additional Information Phone Number +1-844-394-6127
Additional Information Website www.bailliegifford.com/emerging-markets-etf/TSR
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Fund
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
BGEG
$6Footnote Reference*
0.79%Footnote Reference**
FootnoteDescription
Footnote*
The period from commencement to the date of this report is less than a full reporting period. Expenses paid for a full reporting period would be higher.
Footnote**
Annualized
Expenses Paid, Amount $ 6 [1]
Expense Ratio, Percent 0.79% [2]
AssetsNet $ 11,410,522
Holdings Count | Holding 78
Advisory Fees Paid, Amount $ 3,097
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

The following table outlines key Fund statistics that you should pay attention to:

  • Fund net assets$11,410,522
  • Total number of portfolio holdings78
  • Total advisory fees paid$3,097
  • Portfolio turnover rate12%
Additional Fund Statistics Significance or Limits [Text Block]

The following table outlines key Fund statistics that you should pay attention to:
Holdings [Text Block]

Tabular Representation of Holdings as of June 30, 2026

The following table shows the industry sector allocation of the Fund.

Table Summary
Sectors
% of Net Assets
Semiconductors
35.3%
Internet
13.8%
Banks
8.8%
Mining
4.9%
Oil & Gas
4.8%
Telecommunications
2.8%
Diversified Financial Services
2.5%
Insurance
2.0%
Retail
2.0%
Auto Parts & Equipment
2.0%
Electronics
1.9%
Home Furnishings
1.8%
Transportation
1.7%
Other sectors
15.2%
Other assets less liabilities
0.5%
Total
100.0%
C000269508  
Shareholder Report [Line Items]  
Fund Name Baillie Gifford International Alpha ETF
Class Name The Nasdaq Stock Market LLC
Trading Symbol BGIA
Annual or Semi-Annual Statement [Text Block] The semi-annual shareholder report contains important information about  Baillie Gifford International Alpha ETF (the "Fund") for the period of June 2, 2026 (commencement of operations) to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at www.bailliegifford.com/international-alpha-etf/TSR . You can also request this information by contacting us at +1-844-394-6127 or via email at northamericanvehiclesteam@bailliegifford.com.    
Additional Information Phone Number +1-844-394-6127
Additional Information Website www.bailliegifford.com/international-alpha-etf/TSR
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Fund
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
BGIA
$3Footnote Reference*
0.59%Footnote Reference**
FootnoteDescription
Footnote*
The period from commencement to the date of this report is less than a full reporting period. Expenses paid for a full reporting period would be higher.
Footnote**
Annualized
Expenses Paid, Amount $ 3 [3]
Expense Ratio, Percent 0.59% [4]
AssetsNet $ 73,770,570
Holdings Count | Holding 84
Advisory Fees Paid, Amount $ 30,069
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

The following table outlines key Fund statistics that you should pay attention to:

  • Fund net assets$73,770,570
  • Total number of portfolio holdings84
  • Total advisory fees paid$30,069
  • Portfolio turnover rate0%
Additional Fund Statistics Significance or Limits [Text Block]

The following table outlines key Fund statistics that you should pay attention to:
Holdings [Text Block]

Tabular Representation of Holdings as of June 30, 2026

The following table shows the industry sector allocation of the Fund.

Table Summary
Sectors
% of Net Assets
Semiconductors
22.3%
Internet
9.7%
Banks
8.0%
Insurance
4.1%
Mining
3.7%
Commercial Services
3.2%
Machinery - Diversified
2.9%
Pharmaceuticals
2.8%
Home Furnishings
2.7%
Building Materials
2.7%
Diversified Financial Services
2.7%
Transportation
2.4%
Food
2.2%
Other sectors
20.6%
Other assets less liabilities
10.0%
Total
100.0%
C000269509  
Shareholder Report [Line Items]  
Fund Name Baillie Gifford International Concentrated Growth ETF
Class Name The Nasdaq Stock Market LLC
Trading Symbol BGCG
Annual or Semi-Annual Statement [Text Block] The semi-annual shareholder report contains important information about  Baillie Gifford International Concentrated Growth ETF (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at http://www.bailliegifford.com/concentrated-growth-etf/TSR . You can also request this information by contacting us at +1-844-394-6127 or via email at northamericanvehiclesteam@bailliegifford.com.    
Additional Information Phone Number +1-844-394-6127
Additional Information Website http://www.bailliegifford.com/concentrated-growth-etf/TSR
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Fund
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
BGCG
$38
0.77%Footnote Reference*
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.77% [5]
AssetsNet $ 98,773,213
Holdings Count | Holding 29
Advisory Fees Paid, Amount $ 114,101
InvestmentCompanyPortfolioTurnover 52.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

The following table outlines key Fund statistics that you should pay attention to:

  • Fund net assets$98,773,213
  • Total number of portfolio holdings29
  • Total advisory fees paid, net of waiver$114,101
  • Portfolio turnover rate52%
Additional Fund Statistics Significance or Limits [Text Block]

The following table outlines key Fund statistics that you should pay attention to:
Holdings [Text Block]

Tabular Representation of Holdings as of June 30, 2026

The following table shows the industry sector allocation of the Fund.

Table Summary
Sectors
% of Net Assets
Internet
36.7%
Semiconductors
29.9%
Commercial Services
6.4%
Auto Manufacturers
5.9%
Apparel
5.4%
Banks
3.6%
Machinery - Diversified
2.3%
Cosmetics/Personal Care
2.2%
Biotechnology
2.1%
Aerospace/Defense
1.5%
Auto Parts & Equipment
1.3%
Transportation
1.0%
Pharmaceuticals
0.7%
Other sectors
0.6%
Other assets less liabilities
0.4%
Total
100.0%
C000269510  
Shareholder Report [Line Items]  
Fund Name Baillie Gifford Long Term Global Growth ETF
Class Name The Nasdaq Stock Market LLC
Trading Symbol BGGG
Annual or Semi-Annual Statement [Text Block] The semi-annual shareholder report contains important information about  Baillie Gifford Long Term Global Growth ETF (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at www.bailliegifford.com/ltgg-etf/TSR. You can also request this information by contacting us at +1-844-394-6127 or via email at northamericanvehiclesteam@bailliegifford.com.    
Additional Information Phone Number +1-844-394-6127
Additional Information Website www.bailliegifford.com/ltgg-etf/TSR
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Fund
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
BGGG
$35
0.74%Footnote Reference*
FootnoteDescription
Footnote*
Annualized
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.74% [6]
AssetsNet $ 335,571,694
Holdings Count | Holding 39
Advisory Fees Paid, Amount $ 1,319,815
InvestmentCompanyPortfolioTurnover 20.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics as of June 30, 2026

The following table outlines key Fund statistics that you should pay attention to:

  • Fund net assets$335,571,694
  • Total number of portfolio holdings39
  • Total advisory fees paid, net of waiver$1,319,815
  • Portfolio turnover rate20%
Additional Fund Statistics Significance or Limits [Text Block]

The following table outlines key Fund statistics that you should pay attention to:
Holdings [Text Block]

Tabular Representation of Holdings as of June 30, 2026

The following table shows the industry sector allocation of the Fund.

Table Summary
Sectors
% of Net Assets
Internet
35.4%
Semiconductors
21.0%
Software
10.0%
Retail
4.5%
Aerospace/Defense
3.6%
Auto Parts & Equipment
3.4%
Banks
2.9%
Miscellaneous Manufacturing
2.4%
Healthcare - Products
2.1%
Apparel
2.0%
Commercial Services
2.0%
Biotechnology
1.9%
Pharmaceuticals
1.8%
Other sectors
6.7%
Other assets less liabilities
0.3%
Total
100.0%
[1] The period from commencement to the date of this report is less than a full reporting period. Expenses paid for a full reporting period would be higher.
[2] Annualized
[3] The period from commencement to the date of this report is less than a full reporting period. Expenses paid for a full reporting period would be higher.
[4] Annualized
[5] Annualized
[6] Annualized