Pension Benefits Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Benefit obligation at beginning of year
Actuarial gain	$ (172)
Change in plan assets:
Fair Value of Plan Assets at beginning of year	438
Fair Value of Plan Assets at end of year	307	$ 438
Amounts recognized in the consolidated balance sheets consist of:
Long-term liabilities	(354)	(440)
United States
Benefit obligation at beginning of year
Benefit obligation at beginning of year	5	8
Actuarial gain	1	0
Benefits paid	(1)	(3)
Benefit obligation at end of year	3	5	$ 8
Change in plan assets:
Fair Value of Plan Assets at beginning of year	0	0
Aptiv contributions	1	3
Benefits paid	1	3
Fair Value of Plan Assets at end of year	0	0	0
Underfunded status	(3)	(5)
Amounts recognized in the consolidated balance sheets consist of:
Current liabilities	(1)	(1)
Long-term liabilities	(2)	(4)
Total	(3)	(5)
Amounts recognized in accumulated other comprehensive loss consist of (pre-tax):
Actuarial loss	4	6
Total	4	6
Non-U.S. Plans
Benefit obligation at beginning of year
Benefit obligation at beginning of year	861	977
Service cost	15	18	18
Interest cost	23	19	20
Actuarial gain	(171)	(62)
Benefits paid	(35)	(36)
Impact of curtailments	0	(3)
Exchange rate movements and other	(42)	(52)
Benefit obligation at end of year	651	861	977
Change in plan assets:
Fair Value of Plan Assets at beginning of year	438	438
Actual return on plan assets	(89)	23
Aptiv contributions	23	25
Benefits paid	35	36
Exchange rate movements and other	(30)	(12)
Fair Value of Plan Assets at end of year	307	438	$ 438
Underfunded status	(344)	(423)
Amounts recognized in the consolidated balance sheets consist of:
Long-term assets	25	29
Current liabilities	(18)	(17)
Long-term liabilities	(351)	(435)
Total	(344)	(423)
Amounts recognized in accumulated other comprehensive loss consist of (pre-tax):
Actuarial loss	17	101
Total	$ 17	$ 101