v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Milliman Funds Trust
Entity Central Index Key 0002096904
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Milliman Healthcare Inflation Guard ETF  
Shareholder Report [Line Items]  
Fund Name Milliman Healthcare Inflation Guard ETF
Class Name Milliman Healthcare Inflation Guard ETF
Trading Symbol MHIG
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Milliman Healthcare Inflation Guard ETF for the period of April 20, 2026 (fund inception), to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://millimanfunds.com/etfs/mhig. You can also request this information by contacting us at 1-855-700-7959.
Additional Information Phone Number 1-855-700-7959
Additional Information Website https://millimanfunds.com/etfs/mhig
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment**
Milliman Healthcare Inflation Guard ETF
$9
0.48%†
[1],[2],[3]
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.48% [2],[3]
Net Assets $ 987,789
Holdings Count | $ / shares 70
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Net Assets
$987,789
Number of Holdings
70
Portfolio Turnover
34%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Security Type
(% of net assets)
Exchange Traded Funds
53.0
%
U.S. Treasury Bills
27.6
%
Common Stocks
18.2
%
Purchased Options
1.1
%
Written Options
(0.0)
%
Cash & Other
0.1
%
Top Holdings
(% of net assets)
BondBloxx Bloomberg Five Year Target Duration US Treasury ETF
35.3
%
United States Treasury Bill
27.6
%
BondBloxx Bloomberg Six Month Target Duration US Treasury ETF
14.3
%
State Street SPDR S&P 500 ETF Trust
3.4
%
Eli Lilly & Co.
1.7
%
UnitedHealth Group, Inc.
1.5
%
SPDR Gold Shares, Expiration: 08/19/2026; Exercise Price: $370.13
1.1
%
Johnson & Johnson
1.0
%
Thermo Fisher Scientific, Inc.
1.0
%
Abbott Laboratories
0.8
%
Updated Prospectus Web Address https://millimanfunds.com/etfs/mhig
Milliman Healthcare Inflation Plus ETF  
Shareholder Report [Line Items]  
Fund Name Milliman Healthcare Inflation Plus ETF
Class Name Milliman Healthcare Inflation Plus ETF
Trading Symbol MHIP
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Milliman Healthcare Inflation Plus ETF for the period of April 20, 2026 (fund inception), to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at https://millimanfunds.com/etfs/mhip. You can also request this information by contacting us at 1-855-700-7959.
Additional Information Phone Number 1-855-700-7959
Additional Information Website https://millimanfunds.com/etfs/mhip
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment*
Costs paid as a percentage of a $10,000 investment**
Milliman Healthcare Inflation Plus ETF
$10
0.50%†
[4],[5],[6]
Expenses Paid, Amount $ 10
Expense Ratio, Percent 0.50% [5],[6]
Net Assets $ 994,139
Holdings Count | $ / shares 71
Investment Company Portfolio Turnover 34.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of June 30, 2026)
Net Assets
$994,139
Number of Holdings
71
Portfolio Turnover
34%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Security Type
(% of net assets)
Common Stocks
47.1
%
U.S. Treasury Bills
25.9
%
Exchange Traded Funds
24.9
%
Purchased Options
2.1
%
Written Options
(0.0)
%
Cash & Other
0.0
%
Top Holdings
(% of net assets)
United States Treasury Bill
25.9
%
BondBloxx Bloomberg Five Year Target Duration US Treasury ETF
11.5
%
State Street SPDR Portfolio S&P 500 ETF
8.8
%
BondBloxx Bloomberg Six Month Target Duration US Treasury ETF
4.5
%
Eli Lilly & Co.
4.3
%
UnitedHealth Group, Inc.
3.8
%
Johnson & Johnson
2.7
%
Thermo Fisher Scientific, Inc.
2.6
%
Abbott Laboratories
2.2
%
SPDR Gold Shares, Expiration: 08/19/2026; Exercise Price: $349.57
2.1
%
Updated Prospectus Web Address https://millimanfunds.com/etfs/mhip
[1]
** Annualized
[2]
* Amount shown reflects the expenses of the Fund from April 20, 2026 (fund inception) through June 30, 2026. Expenses would be higher if the Fund had been in operation for a complete six month fiscal period.
[3]
† Excludes fees and expenses incurred as a result of investments in underlying funds.
[4]
** Annualized
[5]
* Amount shown reflects the expenses of the Fund from April 20, 2026 (fund inception) through June 30, 2026. Expenses would be higher if the Fund had been in operation for a complete six month fiscal period.
[6]
† Excludes fees and expenses incurred as a result of investments in underlying funds.