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Share-Based Compensation Weighting for Components of Performance Based RSU Awards (Details) - PLC Long Term Incentive Plan
 12 Months Ended
Dec. 31, 2018
2013 - 2015 Grants  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Average return on net assets (1) 50.00% [1]
Cumulative earnings per share (2) 30.00% [2]
Relative total shareholder return (3) 20.00% [3]
2016 - 2018 Grants [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Average return on net assets (1) 50.00% [1]
Cumulative net income 25.00%
Relative total shareholder return (3) 25.00% [3]
[1] Average return on net assets is measured by tax-affected operating income divided by average net working capital plus average net property, plant and equipment for each calendar year during the respective performance period.
[2] Cumulative earnings per share is measured by net income attributable to Aptiv divided by the weighted average number of diluted shares outstanding for the respective three-year performance period.
[3] Relative total shareholder return is measured by comparing the average closing price per share of the Company’s ordinary shares for the specified trading days in the fourth quarter of the end of the performance period to the average closing price per share of the Company’s ordinary shares for the specified trading days in the fourth quarter of the year preceding the grant, including dividends, and assessed against a comparable measure of competitor and peer group companies.