Shareholders' Equity And Net Income Per Share Weighted Average Shares Outstanding and Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income attributable to Aptiv	$ 31	$ 299	$ 590	$ 1,804	$ 990
Denominator:
Weighted average number of basic shares outstanding	270,520	270,030	270,460	263,430	256,810
Dilutive shares related to RSUs			760	440	580
Weighted average MCPS converted shares			0	6,830	0
Weighted average ordinary shares outstanding, including dilutive shares	271,470	270,910	271,220	270,700	257,390
Basic net income per share:
Basic net income per share attributable to ordinary shareholders	$ 0.06	$ 1.05	$ 1.95	$ 6.72	$ 3.85
Diluted net income per share:
Diluted net income per share attributable to ordinary shareholders	$ 0.06	$ 1.04	$ 1.94	$ 6.66	$ 3.85
Net income attributable to Aptiv			$ 590	$ 1,804	$ 990
Mandatory convertible preferred share dividends			(63)	(35)	0
Net Income attributable to ordinary shareholders	$ 15	$ 283	527	1,769	990
Preferred Stock Dividends, Income Statement Impact			$ 63	35	$ 0
Preferred Shares
Diluted net income per share:
Mandatory convertible preferred share dividends				0
Preferred Stock Dividends, Income Statement Impact				$ 0