Commitments And Contingencies	3 Months Ended
Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Ordinary Business Litigation Aptiv is from time to time subject to various legal actions and claims incidental to its business, including those arising out of alleged defects, alleged breaches of contracts, product warranties, intellectual property matters, and employment-related matters. It is the opinion of Aptiv that the outcome of such matters will not have a material adverse impact on the consolidated financial position, results of operations, or cash flows of Aptiv. With respect to warranty matters, although Aptiv cannot ensure that the future costs of warranty claims by customers will not be material, Aptiv believes its established reserves are adequate to cover potential warranty settlements. Unsecured Creditors Litigation Aptiv was subject to ongoing litigation related to general unsecured claims against the former Delphi Corporation, now known as DPHH, resulting from that entity's 2005 bankruptcy filing. The Fourth Amended and Restated Limited Liability Partnership Agreement of Delphi Automotive LLP (the “Fourth LLP Agreement”) was entered into on July 12, 2011 by the members of Delphi Automotive LLP in order to position the Company for its initial public offering. Under the terms of the Fourth LLP Agreement, if cumulative distributions to the members of Delphi Automotive LLP under certain provisions of the Fourth LLP Agreement exceed $7.2 billion, Aptiv, as disbursing agent on behalf of DPHH, is required to pay to the holders of allowed general unsecured claims against DPHH $32.50 for every $67.50 in excess of $7.2 billion distributed to the members, up to a maximum amount of $300 million. On January 12, 2017, the United States Bankruptcy Court for the Southern District of New York (the "Bankruptcy Court") granted summary judgment in favor of the unsecured creditors and thus the $300 million maximum distribution for general unsecured claims was triggered. In connection with the January 2017 ruling, the Company recorded a reserve of $300 million in the fourth quarter of 2016. In March 2017, the Bankruptcy Court issued a ruling on the application of pre-judgment interest owed on the amount of the distribution to be made to the holders of general unsecured claims. Pursuant to this ruling, Aptiv recorded an additional reserve of $27 million during the three months ended March 31, 2017. During the second quarter of 2017, Aptiv and the plaintiffs reached an agreement to settle this matter for $310 million, which was subsequently approved by the Bankruptcy Court. In July 2017, the Company paid the $310 million settlement pursuant to the terms of the settlement agreement. Brazil Matters Aptiv conducts business operations in Brazil that are subject to the Brazilian federal labor, social security, environmental, tax and customs laws, as well as a variety of state and local laws. While Aptiv believes it complies with such laws, they are complex, subject to varying interpretations, and the Company is often engaged in litigation with government agencies regarding the application of these laws to particular circumstances. As of March 31, 2018, the majority of claims asserted against Aptiv in Brazil relate to such litigation. The remaining claims in Brazil relate to commercial and labor litigation with private parties. As of March 31, 2018, claims totaling approximately $180 million (using March 31, 2018 foreign currency rates) have been asserted against Aptiv in Brazil. As of March 31, 2018, the Company maintains accruals for these asserted claims of $25 million (using March 31, 2018 foreign currency rates). The amounts accrued represent claims that are deemed probable of loss and are reasonably estimable based on the Company’s analyses and assessment of the asserted claims and prior experience with similar matters. While the Company believes its accruals are adequate, the final amounts required to resolve these matters could differ materially from the Company’s recorded estimates and Aptiv’s results of operations could be materially affected. The Company estimates the reasonably possible loss in excess of the amounts accrued related to these claims to be zero to $155 million. Environmental Matters Aptiv is subject to the requirements of U.S. federal, state, local and non-U.S. environmental and safety and health laws and regulations. As of March 31, 2018 and December 31, 2017, the undiscounted reserve for environmental investigation and remediation was approximately $5 million (of which $1 million was recorded in accrued liabilities and $4 million was recorded in other long-term liabilities) and $4 million (which was recorded in other long-term liabilities), respectively. Aptiv cannot ensure that environmental requirements will not change or become more stringent over time or that its eventual environmental remediation costs and liabilities will not exceed the amount of its current reserves. In the event that such liabilities were to significantly exceed the amounts recorded, Aptiv’s results of operations could be materially affected. At March 31, 2018, the difference between the recorded liabilities and the reasonably possible range of potential loss was not material.

COMMITMENTS AND CONTINGENCIES

Ordinary Business Litigation

Aptiv is from time to time subject to various legal actions and claims incidental to its business, including those arising out of alleged defects, alleged breaches of contracts, product warranties, intellectual property matters, and employment-related matters. It is the opinion of Aptiv that the outcome of such matters will not have a material adverse impact on the consolidated financial position, results of operations, or cash flows of Aptiv. With respect to warranty matters, although Aptiv cannot ensure that the future costs of warranty claims by customers will not be material, Aptiv believes its established reserves are adequate to cover potential warranty settlements.

Unsecured Creditors Litigation

Aptiv was subject to ongoing litigation related to general unsecured claims against the former Delphi Corporation, now known as DPHH, resulting from that entity's 2005 bankruptcy filing. The Fourth Amended and Restated Limited Liability Partnership Agreement of Delphi Automotive LLP (the “Fourth LLP Agreement”) was entered into on July 12, 2011 by the members of Delphi Automotive LLP in order to position the Company for its initial public offering. Under the terms of the Fourth LLP Agreement, if cumulative distributions to the members of Delphi Automotive LLP under certain provisions of the Fourth LLP Agreement exceed $7.2 billion, Aptiv, as disbursing agent on behalf of DPHH, is required to pay to the holders of allowed general unsecured claims against DPHH $32.50 for every $67.50 in excess of $7.2 billion distributed to the members, up to a maximum amount of $300 million. On January 12, 2017, the United States Bankruptcy Court for the Southern District of New York (the "Bankruptcy Court") granted summary judgment in favor of the unsecured creditors and thus the $300 million maximum distribution for general unsecured claims was triggered. In connection with the January 2017 ruling, the Company recorded a reserve of $300 million in the fourth quarter of 2016. In March 2017, the Bankruptcy Court issued a ruling on the application of pre-judgment interest owed on the amount of the distribution to be made to the holders of general unsecured claims. Pursuant to this ruling, Aptiv recorded an additional reserve of $27 million during the three months ended March 31, 2017.

During the second quarter of 2017, Aptiv and the plaintiffs reached an agreement to settle this matter for $310 million, which was subsequently approved by the Bankruptcy Court. In July 2017, the Company paid the $310 million settlement pursuant to the terms of the settlement agreement.

Brazil Matters

Aptiv conducts business operations in Brazil that are subject to the Brazilian federal labor, social security, environmental, tax and customs laws, as well as a variety of state and local laws. While Aptiv believes it complies with such laws, they are complex, subject to varying interpretations, and the Company is often engaged in litigation with government agencies regarding the application of these laws to particular circumstances. As of March 31, 2018, the majority of claims asserted against Aptiv in Brazil relate to such litigation. The remaining claims in Brazil relate to commercial and labor litigation with private parties. As of March 31, 2018, claims totaling approximately $180 million (using March 31, 2018 foreign currency rates) have been asserted against Aptiv in Brazil. As of March 31, 2018, the Company maintains accruals for these asserted claims of $25 million (using March 31, 2018 foreign currency rates). The amounts accrued represent claims that are deemed probable of loss and are reasonably estimable based on the Company’s analyses and assessment of the asserted claims and prior experience with similar matters. While the Company believes its accruals are adequate, the final amounts required to resolve these matters could differ materially from the Company’s recorded estimates and Aptiv’s results of operations could be materially affected. The Company estimates the reasonably possible loss in excess of the amounts accrued related to these claims to be zero to $155 million.

Environmental Matters

Aptiv is subject to the requirements of U.S. federal, state, local and non-U.S. environmental and safety and health laws and regulations. As of March 31, 2018 and December 31, 2017, the undiscounted reserve for environmental investigation and remediation was approximately $5 million (of which $1 million was recorded in accrued liabilities and $4 million was recorded in other long-term liabilities) and $4 million (which was recorded in other long-term liabilities), respectively. Aptiv cannot ensure that environmental requirements will not change or become more stringent over time or that its eventual environmental remediation costs and liabilities will not exceed the amount of its current reserves. In the event that such liabilities were to significantly exceed the amounts recorded, Aptiv’s results of operations could be materially affected. At March 31, 2018, the difference between the recorded liabilities and the reasonably possible range of potential loss was not material.