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Pension Benefits (Tables)

12 Months Ended

Dec. 31, 2018

Defined Benefit Plan Disclosure [Line Items]

Schedule of Accumulated and Projected Benefit Obligations

The projected benefit obligation (“PBO”), accumulated benefit obligation (“ABO”), and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets and with plan assets in excess of accumulated benefit obligations are as follows:

	U.S. Plans								Non-U.S. Plans
	2018				2017				2018				2017
	(in millions) Plans with ABO in Excess of Plan Assets
PBO	$	18			$	29			$	699			$	743
ABO	18				29				655				701
Fair value of plan assets at end of year	—				—				258				282
	Plans with Plan Assets in Excess of ABO
PBO	$	—			$	—			$	110			$	92
ABO	—				—				85				64
Fair value of plan assets at end of year	—				—				104				95
	Total
PBO	$	18			$	29			$	809			$	835
ABO	18				29				740				765
Fair value of plan assets at end of year	—				—				362				377

Schedule of Assumptions Used

Assumptions used to determine benefit obligations at December 31:

	Pension Benefits
	U.S. Plans						Non-U.S. Plans
	2018			2017			2018			2017
Weighted-average discount rate	3.80	%		2.70	%		3.53	%		3.39	%
Weighted-average rate of increase in compensation levels	N/A			N/A			3.74	%		3.65	%

Assumptions used to determine net expense for years ended December 31:

	Pension Benefits
	U.S. Plans									Non-U.S. Plans
	2018			2017			2016			2018			2017			2016
Weighted-average discount rate	2.70	%		2.70	%		2.70	%		3.39	%		2.83	%		3.81	%
Weighted-average rate of increase in compensation levels	N/A			N/A			N/A			3.65	%		3.86	%		3.67	%
Weighted-average expected long-term rate of return on plan assets	N/A			N/A			N/A			5.63	%		5.84	%		5.84	%

Schedule of Change in Assumptions Used

Aptiv’s pension expense for 2019 is determined at the 2018 year end measurement date. For purposes of analysis, the following table highlights the sensitivity of the Company’ pension obligations and expense attributable to continuing operations to changes in key assumptions:

Change in Assumption		Impact on Pension Expense		Impact on PBO
25 basis point (“bp”) decrease in discount rate		+ $2 million		+ $28 million
25 bp increase in discount rate		- $2 million		- $26 million
25 bp decrease in long-term expected return on assets		+ $1 million		—
25 bp increase in long-term expected return on assets		- $1 million		—

Schedule of Expected Benefit Payments

The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid:

	Projected Pension Benefit Payments
	U.S. Plans				Non-U.S. Plans
	(in millions)
2019	$	8			$	40
2020	4				36
2021	3				39
2022	1				41
2023	1				45
2024 – 2028	2				272

Schedule of Allocation of Plan Assets

The fair values of Aptiv’s pension plan assets weighted-average asset allocations at December 31, 2018 and 2017, by asset category, are as follows:

		Fair Value Measurements at December 31, 2018
Asset Category		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
		(in millions)
Cash		$	22			$	22			$	—			$	—
Time deposits		23				—				23				—
Equity mutual funds		25				—				25				—
Bond mutual funds		148				—				148				—
Real estate trust funds		24				—				—				24
Hedge funds		21				—				—				21
Insurance contracts		6				—				—				6
Debt securities		53				53				—				—
Equity securities		40				40				—				—
Total		$	362			$	115			$	196			$	51

		Fair Value Measurements at December 31, 2017
Asset Category		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)				Significant Observable Inputs (Level 2)				Significant Unobservable Inputs (Level 3)
		(in millions)
Cash		$	17			$	17			$	—			$	—
Time deposits		4				—				4				—
Equity mutual funds		114				—				114				—
Bond mutual funds		94				—				94				—
Real estate trust funds		13				—				—				13
Hedge funds		27				—				—				27
Insurance contracts		6				—				—				6
Debt securities		51				51				—				—
Equity securities		51				51				—				—
Total		$	377			$	119			$	212			$	46

Schedule of Level Three Defined Benefit Plan Assets Roll Forward

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
	Real Estate Trust Fund				Hedge Funds				Insurance Contracts
	(in millions)
Beginning balance at January 1, 2017	$	29			$	107			$	5
Actual return on plan assets:
Relating to assets still held at the reporting date	1				2				1
Purchases, sales and settlements	6				—				—
Spin-off of Delphi Technologies	(23		)		(84		)		—
Foreign currency translation and other	—				2				—
Ending balance at December 31, 2017	$	13			$	27			$	6
Actual return on plan assets:
Relating to assets still held at the reporting date	$	2			$	—			$	—
Purchases, sales and settlements	9				(4		)		—
Foreign currency translation and other	—				(2		)		—
Ending balance at December 31, 2018	$	24			$	21			$	6

U.S. Plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Funded Status

The amounts shown below reflect the change in the U.S. defined benefit pension obligations during 2018 and 2017.

	Year Ended December 31,
	2018				2017
	(in millions)
Benefit obligation at beginning of year	$	29			$	40
Interest cost	1				1
Actuarial gain	(2		)		—
Benefits paid	(10		)		(12		)
Benefit obligation at end of year	18				29
Change in plan assets:
Fair value of plan assets at beginning of year	—				—
Aptiv contributions	10				12
Benefits paid	(10		)		(12		)
Fair value of plan assets at end of year	—				—
Underfunded status	(18		)		(29		)
Amounts recognized in the consolidated balance sheets consist of:
Current liabilities	(7		)		(10		)
Non-current liabilities	(11		)		(19		)
Total	(18		)		(29		)
Amounts recognized in accumulated other comprehensive loss consist of (pre-tax):
Actuarial loss	8				9
Total	$	8			$	9

Schedule of Net Benefit Costs

Benefit costs presented below were determined based on actuarial methods and included the following, which include the results of discontinued operations:

	U.S. Plans
	Year Ended December 31,
	2018				2017				2016
	(in millions)
Interest cost	$	1			$	1			$	1
Amortization of actuarial losses	1				1				1
Net periodic benefit cost	$	2			$	2			$	2

Non-U.S. Plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Funded Status

The amounts shown below reflect the change in the non-U.S. defined benefit pension obligations during 2018 and 2017.

	Year Ended December 31,
	2018				2017
	(in millions)
Benefit obligation at beginning of year	$	835			$	2,137
Obligation assumed in KUM acquisition	25				—
Service cost	17				48
Interest cost	23				54
Actuarial gain	(4		)		(1		)
Benefits paid	(30		)		(71		)
Impact of curtailments	(1		)		3
Plan amendments	6				—
Spin-off of Delphi Technologies	—				(1,518		)
Exchange rate movements and other	(62		)		183
Benefit obligation at end of year	809				835
Change in plan assets:
Fair value of plan assets at beginning of year	377				1,212
Assets acquired in KUM acquisition	19				—
Actual return on plan assets	(6		)		75
Aptiv contributions	38				67
Benefits paid	(30		)		(71		)
Spin-off of Delphi Technologies	—				(997		)
Exchange rate movements and other	(36		)		91
Fair value of plan assets at end of year	362				377
Underfunded status	(447		)		(458		)
Amounts recognized in the consolidated balance sheets consist of:
Non-current assets	2				4
Current liabilities	(17		)		(31		)
Non-current liabilities	(432		)		(431		)
Total	(447		)		(458		)
Amounts recognized in accumulated other comprehensive loss consist of (pre-tax):
Actuarial loss	143				144
Prior service cost	6				1
Total	$	149			$	145

Schedule of Net Benefit Costs

	Non-U.S. Plans
	Year Ended December 31,
	2018				2017				2016
	(in millions)
Service cost	$	17			$	48			$	46
Interest cost	23				54				63
Expected return on plan assets	(22		)		(63		)		(65		)
Settlement loss	3				1				—
Curtailment (gain) loss	(1		)		16				3
Amortization of actuarial losses	13				35				14
Other	—				—				2
Net periodic benefit cost	$	33			$	91			$	63

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