Pension Benefits Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at beginning of year	$ 438
Fair Value of Plan Assets at end of year	438	$ 438
Liability, Defined Benefit Plan [Abstract]
Pension and Other Postretirement Defined Benefit Plans, Non-current Liabilities	(440)	(525)
United States
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	8	11
Interest Cost	0	0	$ 1
Actuarial Loss (Gain)	0	(2)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(3)	(5)
Benefit obligation at end of year	5	8	11
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at beginning of year	0	0
Aptiv contributions	3	5
Benefits Paid	3	5
Fair Value of Plan Assets at end of year	0	0	0
Defined Benefit Plan, Underfunded Status	(5)	(8)
Liability, Defined Benefit Plan [Abstract]
Liability, Defined Benefit Plan, Current	(1)	(3)
Pension and Other Postretirement Defined Benefit Plans, Non-current Liabilities	(4)	(5)
Pension and Other Postretirement Defined Benefit Plans, Total Liabilities	(5)	(8)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	6	7
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	6	7
Non-U.S. Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	977	900
Service Cost	18	18	17
Interest Cost	19	20	25
Actuarial Loss (Gain)	(62)	36
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(36)	(38)
Impact of curtailments	3	0
Exchange rate movements and other	(52)	41
Benefit obligation at end of year	861	977	900
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets at beginning of year	438	403
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	23	40
Aptiv contributions	25	28
Benefits Paid	36	38
Exchange rate movements and other	(12)	5
Fair Value of Plan Assets at end of year	438	438	$ 403
Defined Benefit Plan, Underfunded Status	(423)	(539)
Liability, Defined Benefit Plan [Abstract]
Assets for Plan Benefits, Defined Benefit Plan	29	1
Liability, Defined Benefit Plan, Current	(17)	(21)
Pension and Other Postretirement Defined Benefit Plans, Non-current Liabilities	(435)	(519)
Pension and Other Postretirement Defined Benefit Plans, Total Liabilities	(423)	(539)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	101	197
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax	0	5
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ 101	$ 202