New Accounting Standards (Policies)	9 Months Ended
Sep. 30, 2025
Accounting Policies [Abstract]
New Accounting Standards	Changes to U.S. GAAP are established by the Financial Accounting Standards Board (“FASB”) in the form of Accounting Standards Updates (“ASUs”) to the FASB’s Accounting Standards Codification (“ASC”). Adoption of new accounting standards None. Accounting standards issued but not yet adopted In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740), Improvements to Income Tax Disclosures, to enhance the transparency and decision usefulness of income tax disclosures as well as improve the effectiveness of income tax disclosures. The amendments in this update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold. The amendments in this update also require that all entities disclose on an annual basis certain detailed information about income taxes paid. The amendments in this update related to the rate reconciliation and income taxes paid disclosures improve the transparency of income tax disclosures by requiring (1) consistent categories and greater disaggregation of information in the rate reconciliation and (2) income taxes paid disaggregated by jurisdiction. The amendments allow investors to better assess, in their capital allocation decisions, how an entity’s worldwide operations and related tax risks and tax planning and operational opportunities affect its income tax rate and prospects for future cash flows. The amendments in this update are effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The amendments in this update should be applied on a prospective basis. Retrospective application is permitted. The Company has concluded that ASU 2023-09 will significantly increase the income tax disclosures to its financial statements. The Company will adopt the amendments in this update prospectively upon the effective date. In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40), Disaggregation of Income Statement Expenses, to improve financial reporting by requiring additional information about specific expense categories in the notes to the financial statements at interim and annual reporting periods. The amendments in ASU 2024-03 do not change or remove current expense disclosure requirements. The amendments require that at each interim and annual reporting period an entity should disclose the amounts of (a) purchase of inventory, (b) employee compensation, (c) depreciation and (d) intangible asset amortization included in each relevant expense caption. The amendments in ASU 2024-03 are effective for annual reporting periods beginning after December 1, 2026 and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The amendments in ASU 2024-03 should be applied either (1) prospectively to financial statements issued for reporting periods after the effective date of ASU 2024-03 or (2) retrospectively to any or all periods presented in the financial statements. The Company is currently assessing the impact that ASU 2024-03 will have on its financial statements and will adopt the amendments in this update prospectively upon the effective date. In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40), Targeted improvements to the Accounting for Internal-Use Software, to modernize the accounting for software costs that are accounted for under Subtopic 350-40. ASU 2025-06 removes all references to prescriptive and sequential software development stages throughout Subtopic 350-40. Therefore, an entity is required to start capitalizing software costs when both of the following occur: 1) Management has authorized and committed to funding the software project and 2) It is probable that the project will be completed and the software will be used to perform the function intended. The amendments in ASU 2025-06 are effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual reporting period. The amendments in ASU 2025-06 permits entities to use either 1) a prospective transition approach, 2) a modified transition approach, or 3) a retrospective transition approach. The Company is currently assessing the impact that ASU 2025-06 will have on its financial statements and expects to adopt the amendments in this update using the prospective transition approach. The Company expects that its capitalization of internal-use software costs will not change significantly under the amendments in ASU 2025-06.
Contingent Liabilities	Autoliv’s warranty reserves are based upon the Company’s best estimates of amounts necessary to settle future and existing claims. The Company regularly evaluates the adequacy of these reserves and adjusts them when appropriate. However, the final amounts actually due related to these matters could differ materially from the Company’s recorded estimates.

New Accounting Standards (Policies)

9 Months Ended

Sep. 30, 2025

Changes to U.S. GAAP are established by the Financial Accounting Standards Board (“FASB”) in the form of Accounting Standards Updates (“ASUs”) to the FASB’s Accounting Standards Codification (“ASC”).

Adoption of new accounting standards

None.

Accounting standards issued but not yet adopted

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740), Improvements to Income Tax Disclosures, to enhance the transparency and decision usefulness of income tax disclosures as well as improve the effectiveness of income tax disclosures. The amendments in this update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold. The amendments in this update also require that all entities disclose on an annual basis certain detailed information about income taxes paid. The amendments in this update related to the rate reconciliation and income taxes paid disclosures improve the transparency of income tax disclosures by requiring (1) consistent categories and greater disaggregation of information in the rate reconciliation and (2) income taxes paid disaggregated by jurisdiction. The amendments allow investors to better assess, in their capital allocation decisions, how an entity’s worldwide operations and related tax risks and tax planning and operational opportunities affect its income tax rate and prospects for future cash flows. The amendments in this update are effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The amendments in this update should be applied on a prospective basis. Retrospective application is permitted. The Company has concluded that ASU 2023-09 will significantly increase the income tax disclosures to its financial statements. The Company will adopt the amendments in this update prospectively upon the effective date.

In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40), Disaggregation of Income Statement Expenses, to improve financial reporting by requiring additional information about specific expense categories in the notes to the financial statements at interim and annual reporting periods. The amendments in ASU 2024-03 do not change or remove current expense disclosure requirements. The amendments require that at each interim and annual reporting period an entity should disclose the amounts of (a) purchase of inventory, (b) employee compensation, (c) depreciation and (d) intangible asset amortization included in each relevant expense caption. The amendments in ASU 2024-03 are effective for annual reporting periods beginning after December 1, 2026 and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The amendments in ASU 2024-03 should be applied either (1) prospectively to financial statements issued for reporting periods after the effective date of ASU 2024-03 or (2) retrospectively to any or all periods presented in the financial statements. The Company is currently assessing the impact that ASU 2024-03 will have on its financial statements and will adopt the amendments in this update prospectively upon the effective date.

In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40), Targeted improvements to the Accounting for Internal-Use Software, to modernize the accounting for software costs that are accounted for under Subtopic 350-40. ASU 2025-06 removes all references to prescriptive and sequential software development stages throughout Subtopic 350-40. Therefore, an entity is required to start capitalizing software costs when both of the following occur: 1) Management has authorized and committed to funding the software project and 2) It is probable that the project will be completed and the software will be used to perform the function intended. The amendments in ASU 2025-06 are effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. Early adoption is permitted as of the beginning of an annual reporting period. The amendments in ASU 2025-06 permits entities to use either 1) a prospective transition approach, 2) a modified transition approach, or 3) a retrospective transition approach. The Company is currently assessing the impact that ASU 2025-06 will have on its financial statements and expects to adopt the amendments in this update using the prospective transition approach. The Company expects that its capitalization of internal-use software costs will not change significantly under the amendments in ASU 2025-06.

Contingent Liabilities

Autoliv’s warranty reserves are based upon the Company’s best estimates of amounts necessary to settle future and existing claims. The Company regularly evaluates the adequacy of these reserves and adjusts them when appropriate. However, the final amounts actually due related to these matters could differ materially from the Company’s recorded estimates.