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Investments in Affiliates Transactions with Affiliates (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract] |  |  |
Sales to affiliates | $ 7 | $ 8 | $ 14
Purchases from affiliates | $ 38 | $ 19 | $ 23

X
- Definition Purchases from affiliates in the period. + References No definition available. + Details
Name: | aptv_PurchasesFromAffiliates
Namespace Prefix: | aptv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sales to non-consolidated affiliates in the period. + References No definition available. + Details
Name: | aptv_SalesToAffiliates
Namespace Prefix: | aptv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration