Schedule H, Line 4i - Schedule of Assets (Held at End of Year) (Details) - The Magna Group of Companies Retirement Savings Plans
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2025
USD ($)
|
|---|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Entity tax identification number |
98-0095901
|
| Plan number |
002
|
| Investment party in interest |
true
|
| Participant Loans |
$ 64,470
|
| Total Investments |
2,855,733
|
| Pooled Separate Accounts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investments, current value |
237,548
|
| Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investments, current value |
1,979,988
|
| Mutual funds |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investments, current value |
$ 149,507
|
| Investment, Identifier [Axis]: Fidelity MID CP Index Fund, Mutual Funds |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:FidelityInvestmentsMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual funds
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 89,149
|
| Investment, Identifier [Axis]: Fidelity US Bond Index Fund, Mutual Funds |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:FidelityInvestmentsMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual funds
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 42,772
|
| Investment, Identifier [Axis]: JPMCB Large Cap Growth CF-A, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:JpmorganChaseBankN.a.Member
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 187,666
|
| Investment, Identifier [Axis]: Magna International Inc., Magna Stock |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:MagnaInternationalInc.Member
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
EBP, Employer, Common Stock [Member]
|
| Investments, cost |
$ 253,401
|
| Investments, current value |
$ 274,071
|
| Investment, Identifier [Axis]: Magna Mass Mutual GTD ACCUM CNT, Fully Benefit Responsive Investment Contracts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:MassMutualMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
mga:EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractsMember
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 3,293
|
| Investment, Identifier [Axis]: Northwestern Mutual Life Insurance Co, Life Insurance Policies |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:NorthwesternMutualLifeInsuranceCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Employee Benefit Plan, Life Insurance Policies [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 34
|
| Investment, Identifier [Axis]: Prin Core Plus Bond Sep Acct-Z, Pooled Separate Accounts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalLifeInsuranceCompanyMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Pooled Separate Accounts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 57,160
|
| Investment, Identifier [Axis]: Prin Div Intl SA-I5, Pooled Separate Accounts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalLifeInsuranceCompanyMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Pooled Separate Accounts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 83,578
|
| Investment, Identifier [Axis]: Prin Equity Income SA-Z, Pooled Separate Accounts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalLifeInsuranceCompanyMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Pooled Separate Accounts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 72,646
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2015 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 3,863
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2020 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 100,968
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2025 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 51,023
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2030 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 309,814
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2035 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 82,518
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2040 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 280,604
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2045 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 83,546
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2050 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 228,033
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2055 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 74,222
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2060 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 60,323
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2065 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 9,485
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb 2070 CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 4,262
|
| Investment, Identifier [Axis]: Prin LifeTime Hyb Inc CIT Q, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 18,258
|
| Investment, Identifier [Axis]: Prin U.S. Property SA-I5, Pooled Separate Accounts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalLifeInsuranceCompanyMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Pooled Separate Accounts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 24,164
|
| Investment, Identifier [Axis]: Principal Global Investors Trust Co, Principal Stable Value, Stable Value Funds |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalGlobalInvestorsTrustCoMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Employee Benefit Plan, Stable Value Fund [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 143,649
|
| Investment, Identifier [Axis]: Principal Life Insurance Company, Principal Pension Builder, Deferred Income Annuities |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Investment party in interest |
true
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:PrincipalLifeInsuranceCompanyMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Employee Benefit Plan, Deferred Income Annuities [Member]
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 3,173
|
| Investment, Identifier [Axis]: SPARTAN 500 INDEX POOL D, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:GeodeCapitalMgmtTrustCoLlcMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 360,801
|
| Investment, Identifier [Axis]: SPARTAN SMALL CAP IND POOL D, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:GeodeCapitalMgmtTrustCoLlcMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 96,565
|
| Investment, Identifier [Axis]: SPARTAN TOTAL INTL IND CL D, Common/Collective Trusts |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:GeodeCapitalMgmtTrustCoLlcMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Common/Collective Trusts
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 28,037
|
| Investment, Identifier [Axis]: Vanguard Emerging Mkt Stk Index Fund, Mutual Funds |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| EBP, Investment, Issuer Name [Extensible Enumeration] |
mga:VanguardGroupMember
|
| EBP, Investment, Current Value, Type [Extensible Enumeration] |
Mutual funds
|
| EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] |
us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
|
| Investments, current value |
$ 17,586
|
| Maximum |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Interest on loans (as a percent) |
10.50%
|
| Minimum |
|
| Schedule H, Line 4i - Schedule of Assets (Held at End of Year) |
|
| Interest on loans (as a percent) |
4.25%
|