Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]
Use of Estimates, Policy [Policy Text Block]	Use of estimates—Preparation of consolidated financial statements in conformity with U.S. GAAP requires the use of estimates and assumptions that affect amounts reported therein. Generally, matters subject to estimation and judgment include amounts related to accounts receivable realization, inventory obsolescence, asset impairments, useful lives of intangible and fixed assets, deferred tax asset valuation allowances, income taxes, pension benefit plan assumptions, accruals related to litigation, warranty costs, restructuring, environmental remediation costs, worker’s compensation accruals and healthcare accruals. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be based upon amounts that differ from those estimates. Events or changes in circumstances after March 31, 2020, including those resulting from the impacts of the COVID-19 pandemic, will be included in future periods.
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation The unaudited consolidated financial statements included herein have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete annual financial statements. These financial statements include all adjustments, which consist of normal recurring items, necessary for a fair presentation. The operating results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. These financial statements should be read in conjunction with the Delphi Technologies’ Annual Report on Form 10-K for the year ended December 31, 2019.
Net Income Per Share, Policy	SHAREHOLDERS’ EQUITY AND NET INCOME PER SHARE Net Income Per Share Basic net income per share is computed by dividing net income attributable to Delphi Technologies by the weighted average number of ordinary shares outstanding during the period. Diluted net income per share reflects the weighted average dilutive impact of all potentially dilutive securities from the date of issuance and is computed using the treasury stock method by dividing net income attributable to Delphi Technologies by the diluted weighted average number of ordinary shares outstanding. For all periods presented the calculation of net income per share contemplates the dilutive impacts, if any, of the Company’s share-based compensation plans. Refer to Note 18. Share-Based Compensation for additional information.
Recently Issued Accounting Pronouncements, Policy	Recently adopted accounting pronouncements—In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This guidance requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. This guidance also requires enhanced disclosures regarding significant estimates and judgments used in estimating credit losses. The Company adopted this ASU on January 1, 2020. This guidance is applicable to the Company’s accounts receivable allowance for doubtful accounts, reimbursable engineering costs, notes receivable and cash equivalents. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This guidance simplifies how an entity is required to test goodwill for impairment by eliminating step two from the goodwill impairment test, which measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount. Under the new guidance, if a reporting unit’s carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. The impairment charge will be limited to the amount of goodwill allocated to that reporting unit. The Company adopted this ASU on January 1, 2020. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. This guidance amends ASC 820 to add, remove and clarify certain disclosure requirements related to fair value measures. The Company adopted this ASU on January 1, 2020. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. Recently issued accounting pronouncements not yet adopted—In August 2018, the FASB issued ASU 2018-14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans. This guidance amends ASC 715 to add, remove and clarify certain disclosure requirements related to defined benefit pension and other postretirement plans. The new guidance is effective for fiscal years ending after December 31, 2020. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This guidance provides temporary optional expedients and exceptions for applying US GAAP on contract modifications and hedge accounting affected by reference rate reform if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. The new guidance is effective March 12, 2020 and can be applied through December 31, 2022. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.
Pensions, Policy	The Company sponsors defined benefit pension plans for certain employees and retirees outside of the U.S. Using appropriate actuarial methods and assumptions, the Company’s defined benefit pension plans are accounted for in accordance with FASB ASC Topic 715, Compensation—Retirement Benefits. The Company’s primary non-U.S. plans are located in the United Kingdom (“U.K.”), France and Mexico. The U.K. and certain Mexican plans are funded. In addition, the Company has defined benefit plans in South Korea, Turkey and Italy for which amounts are payable to employees immediately upon separation. The obligations for these plans are recorded over the requisite service period. Delphi Technologies does not have any U.S. pension assets or liabilities
Segment Reporting, Policy [Policy Text Block]	The accounting policies of the segments are the same as those of the consolidated Company, except that the disaggregated financial results for the segments have been prepared using a management approach, which is consistent with the basis and manner in which management internally disaggregates financial information for which Delphi Technologies’ chief operating decision maker regularly reviews financial results to assess performance of, and make internal operating decisions about allocating resources to the segments.

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2020

Use of Estimates, Policy [Policy Text Block]

Use of estimates—Preparation of consolidated financial statements in conformity with U.S. GAAP requires the use of estimates and assumptions that affect amounts reported therein. Generally, matters subject to estimation and judgment include amounts related to accounts receivable realization, inventory obsolescence, asset impairments, useful lives of intangible and fixed assets, deferred tax asset valuation allowances, income taxes, pension benefit plan assumptions, accruals related to litigation, warranty costs, restructuring, environmental remediation costs, worker’s compensation accruals and healthcare accruals. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be based upon amounts that differ from those estimates. Events or changes in circumstances after March 31, 2020, including those resulting from the impacts of the COVID-19 pandemic, will be included in future periods.

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation

The unaudited consolidated financial statements included herein have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete annual financial statements. These financial statements include all adjustments, which consist of normal recurring items, necessary for a fair presentation. The operating results for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. These financial statements should be read in conjunction with the Delphi Technologies’ Annual Report on Form 10-K for the year ended December 31, 2019.

Net Income Per Share, Policy

SHAREHOLDERS’ EQUITY AND NET INCOME PER SHARE

Net Income Per Share

Basic net income per share is computed by dividing net income attributable to Delphi Technologies by the weighted average number of ordinary shares outstanding during the period. Diluted net income per share reflects the weighted average dilutive impact of all potentially dilutive securities from the date of issuance and is computed using the treasury stock method by dividing net income attributable to Delphi Technologies by the diluted weighted average number of ordinary shares outstanding. For all periods presented the calculation of net income per share contemplates the dilutive impacts, if any, of the Company’s share-based compensation plans. Refer to Note 18. Share-Based Compensation for additional information.

Recently Issued Accounting Pronouncements, Policy

Recently adopted accounting pronouncements—In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This guidance requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. This guidance also requires enhanced disclosures regarding significant estimates and judgments used in estimating credit losses. The Company adopted this ASU on January 1, 2020. This guidance is applicable to the Company’s accounts receivable allowance for doubtful accounts, reimbursable engineering costs, notes receivable and cash equivalents. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This guidance simplifies how an entity is required to test goodwill for impairment by eliminating step two from the goodwill impairment test, which measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount. Under the new guidance, if a reporting unit’s carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. The impairment charge will be limited to the amount of goodwill allocated to that reporting unit. The Company adopted this ASU on January 1, 2020. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. This guidance amends ASC 820 to add, remove and clarify certain

disclosure requirements related to fair value measures. The Company adopted this ASU on January 1, 2020. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements.

Recently issued accounting pronouncements not yet adopted—In August 2018, the FASB issued ASU 2018-14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans. This guidance amends ASC 715 to add, remove and clarify certain disclosure requirements related to defined benefit pension and other postretirement plans. The new guidance is effective for fiscal years ending after December 31, 2020. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This guidance provides temporary optional expedients and exceptions for applying US GAAP on contract modifications and hedge accounting affected by reference rate reform if certain criteria are met. An entity that makes this election would not have to remeasure the contracts at the modification date or reassess a previous accounting determination. The new guidance is effective March 12, 2020 and can be applied through December 31, 2022. The adoption of this guidance is not expected to have a material impact on the Company’s consolidated financial statements.

Pensions, Policy

The Company sponsors defined benefit pension plans for certain employees and retirees outside of the U.S. Using appropriate actuarial methods and assumptions, the Company’s defined benefit pension plans are accounted for in accordance with FASB ASC Topic 715, Compensation—Retirement Benefits. The Company’s primary non-U.S. plans are located in the United Kingdom (“U.K.”), France and Mexico. The U.K. and certain Mexican plans are funded. In addition, the Company has defined benefit plans in South Korea, Turkey and Italy for which amounts are payable to employees immediately upon separation. The obligations for these plans are recorded over the requisite service period. Delphi Technologies does not have any U.S. pension assets or liabilities

Segment Reporting, Policy [Policy Text Block]

The accounting policies of the segments are the same as those of the consolidated Company, except that the disaggregated financial results for the segments have been prepared using a management approach, which is consistent with the basis and manner in which management internally disaggregates financial information for which Delphi Technologies’ chief operating decision maker regularly reviews financial results to assess performance of, and make internal operating decisions about allocating resources to the segments.

- Definition

Disclosure of accounting policy for segment reporting.

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