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Investments in Affiliates Transactions with Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
	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

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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

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration