Aptiv (APTV) 10-Q 2 May 19 2019 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 26, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	APTIV PLC
Entity Central Index Key	0001521332
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		257,835,355

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 3,575	$ 3,630
Operating expenses:
Cost of sales	2,962	2,947
Selling, general and administrative	256	259
Amortization	34	30
Restructuring	26	20
Total operating expenses	3,278	3,256
Operating income	297	374
Interest expense	(38)	(34)
Other (expense) income, net	16	30
Income before income taxes and equity income	275	370
Income tax expense	(33)	(59)
Income before equity income	242	311
Equity income, net of tax	3	5
Net income	245	316
Net income attributable to noncontrolling interest	5	9
Net income attributable to Aptiv	$ 240	$ 307
Basic net income per share:
Basic net income per share attributable to Aptiv	$ 0.93	$ 1.16
Weighted average number of basic shares outstanding	259,080	265,690
Diluted net income per share:
Diluted net income per share attributable to Aptiv	$ 0.92	$ 1.15
Weighted average number of diluted shares outstanding	259,550	266,440

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 245	$ 316
Other comprehensive income (loss):
Currency translation adjustments	1	61
Net change in unrecognized gain (loss) on derivative instruments, net of tax (Note 14)	19	(23)
Employee benefit plans adjustment, net of tax	2	1
Other comprehensive income (loss)	22	39
Comprehensive income	267	355
Comprehensive income attributable to noncontrolling interests	6	13
Comprehensive income attributable to Aptiv	$ 261	$ 342

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 321	$ 567
Restricted cash	1	1
Accounts receivable, net	2,736	2,487
Inventories (Note 3)	1,326	1,277
Other current assets (Note 4)	435	445
Total current assets	4,819	4,777
Long-term assets:
Property, net	3,218	3,179
Operating lease right-of-use assets (Note 22)	434	0
Investments in affiliates	102	99
Intangible assets, net (Note 2)	1,334	1,380
Goodwill (Note 2)	2,503	2,524
Other long-term assets (Note 4)	609	521
Total long-term assets	8,200	7,703
Total assets	13,019	12,480
Current liabilities:
Short-term debt (Note 8)	542	306
Accounts payable	2,340	2,334
Accrued liabilities (Note 5)	1,132	1,054
Total current liabilities	4,014	3,694
Long-term liabilities:
Long-term debt (Note 8)	3,995	4,038
Pension benefit obligations	440	445
Long-term operating lease liabilities (Note 22)	350	0
Other long-term liabilities (Note 5)	585	633
Total long-term liabilities	5,370	5,116
Total liabilities	9,384	8,810
Commitments and contingencies (Note 10)
Shareholders' equity:
Preferred shares, $0.01 par value per share, 50,000,000 shares authorized, none issued and outstanding	0	0
Ordinary shares, $0.01 par value per share, 1,200,000,000 shares authorized, 257,840,184 and 259,991,022 issued and outstanding as of March 31, 2019 and December 31, 2018, respectively	3	3
Additional paid-in capital	1,606	1,639
Retained earnings	2,491	2,511
Accumulated other comprehensive loss (Note 13)	(682)	(694)
Total Aptiv shareholders' equity	3,418	3,459
Noncontrolling interest	217	211
Total shareholders' equity	3,635	3,670
Total liabilities and shareholders' equity	$ 13,019	$ 12,480

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred shares, par value per share	$ 0.01	$ 0.01
Preferred shares, authorized	50,000,000	50,000,000
Preferred shares, outstanding	0	0
Ordinary shares, par value per share	$ 0.01	$ 0.01
Ordinary shares, authorized	1,200,000,000	1,200,000,000
Ordinary shares, outstanding	257,840,184	259,991,022

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Document Period End Date	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 245	$ 316
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	139	125
Amortization	34	30
Amortization of deferred debt issuance costs	2	2
Restructuring expense, net of cash paid	(5)	(16)
Deferred income taxes	4	(7)
Pension and other postretirement benefit expenses	10	11
Income from equity method investments, net of dividends received	(3)	(5)
Loss on extinguishment of debt	6	0
Share-based compensation	15	13
Changes in operating assets and liabilities:
Accounts receivable, net	(249)	(206)
Inventories	(49)	(119)
Other assets	(45)	(49)
Accounts payable	(53)	(140)
Accrued and other long-term liabilities	(35)	2
Other, net	(30)	(40)
Pension contributions	(8)	(11)
Net cash provided by (used in) operating activities from continuing operations	84	186
Net cash used in operating activities from discontinued operations	0	(31)
Net cash provided by operating activities	84	155
Cash flows from investing activities:
Capital expenditures	(235)	(243)
Proceeds from sale of property / investments	3	3
Cost of business acquisitions, net of cash acquired	2	0
Other Payments to Acquire Businesses	0	5
Cost of technology investments	(3)	0
Settlement of derivatives	2	0
Net cash used in investing activities	(235)	(245)
Cash flows from financing activities:
Net (repayments) proceeds under other short-term debt agreements	229	35
Repayments of Unsecured Debt	654	0
Proceeds from issuance of senior notes, net of issuance costs	643	0
Repurchase of ordinary shares	(226)	(149)
Distribution of cash dividends	(57)	(59)
Taxes withheld and paid on employees' restricted share awards	(34)	(32)
Net cash used in financing activities	(99)	(205)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	4	44
Increase (decrease) in cash, cash equivalents and restricted cash	(246)	(251)
Cash, cash equivalents and restricted cash at beginning of period	568	1,597
Cash, cash equivalents and restricted cash at end of period	$ 322	$ 1,346

Consolidated Statement Of Share

Consolidated Statement Of Shareholders' Equity - USD ($) $ in Millions	Total	Ordinary Shares	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Aptiv Shareholders' Equity	Noncontrolling Interest
Balance at Dec. 31, 2017	$ 3,517	$ 3	$ 1,649	$ 2,118	$ (471)	$ 3,299	$ 218
Balance, in shares at Dec. 31, 2017		266,000,000
Net income	316			307		307	9
Other comprehensive income	39				35	35	4
Taxes witheld on employees' restricted share award vestings	$ (32)		(32)			(32)
Repurchase of ordinary shares, in shares	(1,676,144)	(2,000,000)
Repurchase of ordinary shares	$ (149)		(8)	(141)		(149)
Share-based compensation, in shares		1,000,000
Share based compensation	13		13			13
Distribution of Delphi Technologies	3			3		3
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(9)			(9)		(9)
Balance at Mar. 31, 2018	3,698	$ 3	1,622	2,278	(436)	3,467	231
Balance, in shares at Mar. 31, 2018		265,000,000
Balance at Dec. 31, 2018	3,670	$ 3	1,639	2,511	(694)	3,459	211
Balance, in shares at Dec. 31, 2018		260,000,000
Net income	245			240		240	5
Other comprehensive income	22				21	21	1
Dividends, Cash	57		(1)	58		57	0
Taxes witheld on employees' restricted share award vestings	$ (34)		(34)			(34)
Repurchase of ordinary shares, in shares	(2,840,079)	(3,000,000)
Repurchase of ordinary shares	$ (226)		(15)	(211)		(226)
Share-based compensation, in shares		1,000,000
Share based compensation	15		15			15
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0			9	(9)	0
Balance at Mar. 31, 2019	$ 3,635	$ 3	$ 1,606	$ 2,491	$ (682)	$ 3,418	$ 217
Balance, in shares at Mar. 31, 2019		258,000,000

General

General	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	GENERAL General and basis of presentation —“Aptiv,” the “Company,” “we,” “us” and “our” refer to Aptiv PLC, a public limited company formed under the laws of Jersey on May 19, 2011 as Delphi Automotive PLC, which, through its subsidiaries, acquired certain assets of the former Delphi Corporation (now known as DPH Holdings Corp. (“DPHH”)) and completed an initial public offering on November 22, 2011 . On December 4, 2017 (the “Distribution Date”), the Company completed the separation (the “Separation”) of its former Powertrain Systems segment by distributing to Aptiv shareholders on a pro rata basis all of the issued and outstanding ordinary shares of Delphi Technologies PLC, a public limited company formed to hold the spun-off business. To effect the Separation, the Company distributed to its shareholders one ordinary share of Delphi Technologies PLC for every three Aptiv ordinary shares outstanding as of November 22, 2017 , the record date for the distribution. Following the Separation, the remaining company changed its name to Aptiv PLC and New York Stock Exchange (“NYSE”) symbol to “APTV.” In April 2018, primarily as a result of the impact of the Separation on the Company’s United Kingdom (“U.K.”) presence and the centralization of the Company’s non-manufacturing European footprint, along with the long-term stability of the financial and regulatory environment in Ireland and continued uncertainties with regards to the impending exit of the U.K. from the European Union, Aptiv PLC changed its tax residence from the U.K. to Ireland. Aptiv PLC remains a public limited company incorporated under the laws of Jersey, and continues to be subject to United States (“U.S.”) Securities and Exchange Commission reporting requirements and prepare its consolidated financial statements in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The consolidated financial statements have been prepared in accordance with U.S. GAAP and all adjustments, consisting of only normal recurring items, which are necessary for a fair presentation, have been included. The consolidated financial statements and notes thereto included in this report should be read in conjunction with Aptiv’s 2018 Annual Report on Form 10-K. Nature of operations

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES Consolidation —The consolidated financial statements include the accounts of Aptiv and U.S. and non-U.S. subsidiaries in which Aptiv holds a controlling financial or management interest and variable interest entities of which Aptiv has determined that it is the primary beneficiary. Aptiv’s share of the earnings or losses of non-controlled affiliates, over which Aptiv exercises significant influence (generally a 20% to 50% ownership interest), is included in the consolidated operating results using the equity method of accounting. When Aptiv does not have the ability to exercise significant influence (generally when ownership interest is less than 20%), investments in non-consolidated affiliates are accounted for in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , and are measured at cost, less impairments, adjusted for observable price changes in orderly transactions for identical or similar investments of the same issuer. All significant intercompany transactions and balances between consolidated Aptiv businesses have been eliminated. The Company monitors its investments in affiliates for indicators of other-than-temporary declines in value on an ongoing basis. If the Company determines that such a decline has occurred, an impairment loss is recorded, which is measured as the difference between carrying value and estimated fair value. Estimated fair value is generally determined using an income approach based on discounted cash flows or negotiated transaction values. Investments in non-consolidated affiliates totaled $94 million and $72 million as of March 31, 2019 and December 31, 2018 , respectively, and are classified within other long-term assets in the consolidated balance sheet. Use of estimates —Preparation of consolidated financial statements in conformity with U.S. GAAP requires the use of estimates and assumptions that affect amounts reported therein. Generally, matters subject to estimation and judgment include amounts related to accounts receivable realization, inventory obsolescence, asset impairments, useful lives of intangible and fixed assets, deferred tax asset valuation allowances, income taxes, pension benefit plan assumptions, accruals related to litigation, warranty costs, environmental remediation costs, contingent consideration arrangements, worker’s compensation accruals and healthcare accruals. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be based upon amounts that differ from those estimates. Revenue recognition —Aptiv recognizes revenue in accordance with ASU 2014-09, Revenue from Contracts with Customers . Refer to Note 21. Revenue for additional information regarding the Company’s revenue recognition policies. Net income per share —Basic net income per share is computed by dividing net income attributable to Aptiv by the weighted average number of ordinary shares outstanding during the period. Diluted net income per share reflects the weighted average dilutive impact of all potentially dilutive securities from the date of issuance and is computed using the treasury stock method by dividing net income attributable to Aptiv by the diluted weighted average number of ordinary shares outstanding during the period. Unless otherwise noted, share and per share amounts included in these notes are on a diluted basis. Refer to Note 12. Shareholders’ Equity and Net Income Per Share for additional information including the calculation of basic and diluted net income per share. Cash and cash equivalents —Cash and cash equivalents are defined as short-term, highly liquid investments with original maturities of three months or less. Accounts receivable —Aptiv enters into agreements to sell certain of its accounts receivable, primarily in Europe. Sales of receivables are accounted for in accordance with FASB Accounting Standards Codification (“ASC”) Topic 860, Transfers and Servicing (“ASC 860”). Agreements which result in true sales of the transferred receivables, as defined in ASC 860, which occur when receivables are transferred without recourse to the Company, are excluded from amounts reported in the consolidated balance sheets. Cash proceeds received from such sales are included in operating cash flows. Agreements that allow Aptiv to maintain effective control over the transferred receivables and which do not qualify as a sale, as defined in ASC 860, are accounted for as secured borrowings and recorded in the consolidated balance sheets within accounts receivable, net and short-term debt. The expenses associated with receivables factoring are recorded in the consolidated statements of operations within interest expense. Intangible assets —Intangible assets were $1,334 million and $1,380 million as of March 31, 2019 and December 31, 2018 , respectively. Aptiv amortizes definite-lived intangible assets over their estimated useful lives. Aptiv has definite-lived intangible assets related to patents and developed technology, customer relationships and trade names. Indefinite-lived in-process research and development intangible assets are not amortized, but are tested for impairment annually, or more frequently when indicators of potential impairment exist, until the completion or abandonment of the associated research and development efforts. Upon completion of the projects, the assets will be amortized over the expected economic life of the asset, which will be determined on that date. Should the project be determined to be abandoned, and if the asset developed has no alternative use, the full value of the asset will be charged to expense. The Company also has intangible assets related to acquired trade names that are classified as indefinite-lived when there are no foreseeable limits on the periods of time over which they are expected to contribute cash flows. These indefinite-lived trade name assets are tested for impairment annually, or more frequently when indicators of potential impairment exist. Costs to renew or extend the term of acquired intangible assets are recognized as expense as incurred. Amortization expense was $34 million and $30 million and for the three months ended March 31, 2019 and 2018 , respectively. Goodwill —Goodwill is the excess of the purchase price over the estimated fair value of identifiable net assets acquired in business combinations. The Company tests goodwill for impairment annually in the fourth quarter, or more frequently when indications of potential impairment exist. The Company monitors the existence of potential impairment indicators throughout the fiscal year. The Company tests for goodwill impairment at the reporting unit level. Our reporting units are the components of operating segments which constitute businesses for which discrete financial information is available and is regularly reviewed by segment management. The impairment test involves first qualitatively assessing goodwill for impairment. If the qualitative assessment is not met the Company then performs a quantitative assessment by first comparing the estimated fair value of each reporting unit to its carrying value, including goodwill. Fair value reflects the price a market participant would be willing to pay in a potential sale of the reporting unit. If the estimated fair value exceeds carrying value, then we conclude that no goodwill impairment has occurred. If the carrying value of the reporting unit exceeds its estimated fair value, a second step is required to measure possible goodwill impairment loss. The second step includes hypothetically valuing the tangible and intangible assets and liabilities of the reporting unit as if the reporting unit had been acquired in a business combination. Then, the implied fair value of the reporting unit’s goodwill is compared to the carrying value of that goodwill. If the carrying value of the reporting unit’s goodwill exceeds the implied fair value of the goodwill, the Company recognizes an impairment loss in an amount equal to the excess, not to exceed the carrying value. There were no indicators of potential goodwill impairment during the three months ended March 31, 2019 . Goodwill was $2,503 million and $2,524 million as of March 31, 2019 and December 31, 2018 , respectively. Warranty and product recalls —Expected warranty costs for products sold are recognized at the time of sale of the product based on an estimate of the amount that eventually will be required to settle such obligations. These accruals are based on factors such as past experience, production changes, industry developments and various other considerations. Costs of product recalls, which may include the cost of the product being replaced as well as the customer’s cost of the recall, including labor to remove and replace the recalled part, are accrued as part of our warranty accrual at the time an obligation becomes probable and can be reasonably estimated. These estimates are adjusted from time to time based on facts and circumstances that impact the status of existing claims. Refer to Note 6. Warranty Obligations for additional information. Discontinued operations —The Company reports financial results for discontinued operations separately from continuing operations to distinguish the financial impact of disposal transactions from ongoing operations. Discontinued operations reporting occurs only when the disposal of a component or a group of components of the Company represents a strategic shift that will have a major effect on the Company’s operations and financial results. During the year ended December 31, 2017, the Company completed the Separation of its former Powertrain Systems segment by means of a spin-off into Delphi Technologies PLC. As a result of the spin-off, Aptiv recorded certain short-term assets and liabilities within the consolidated balance sheets as of March 31, 2018 and December 31, 2017 related to various agreements entered into in connection with the spin-off. The changes in these short-term assets and liabilities are reflected within operating activities from discontinued operations in the consolidated statement of cash flows for the three months ended March 31, 2018 . Income taxes —Deferred tax assets and liabilities reflect temporary differences between the amount of assets and liabilities for financial and tax reporting purposes. Such amounts are adjusted, as appropriate, to reflect changes in tax rates expected to be in effect when the temporary differences reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in earnings in the period that includes the enactment date. A valuation allowance is recorded to reduce deferred tax assets to the amount that is more likely than not to be realized. In the event the Company determines it is more likely than not that the deferred tax assets will not be realized in the future, the valuation allowance adjustment to the deferred tax assets will be charged to earnings in the period in which the Company makes such a determination. In determining the provision for income taxes for financial statement purposes, the Company makes certain estimates and judgments which affect its evaluation of the carrying value of its deferred tax assets, as well as its calculation of certain tax liabilities. Refer to Note 11. Income Taxes for additional information. Restructuring —Aptiv continually evaluates alternatives to align the business with the changing needs of its customers and to lower operating costs. This includes the realignment of its existing manufacturing capacity, facility closures, or similar actions, either in the normal course of business or pursuant to significant restructuring programs. These actions may result in employees receiving voluntary or involuntary employee termination benefits, which are mainly pursuant to union or other contractual agreements. Voluntary termination benefits are accrued when an employee accepts the related offer. Involuntary termination benefits are accrued upon the commitment to a termination plan and when the benefit arrangement is communicated to affected employees, or when liabilities are determined to be probable and estimable, depending on the existence of a substantive plan for severance or termination. Contract termination costs are recorded when contracts are terminated or when Aptiv ceases to use the leased facility and no longer derives economic benefit from the contract. All other exit costs are expensed as incurred. Refer to Note 7. Restructuring for additional information. Customer concentrations —As reflected in the table below, net sales to General Motors Company (“GM”) and Volkswagen Group (“VW”), Aptiv’s two largest customers, totaled approximately 18% and 19% of our total net sales for the three months ended March 31, 2019 and 2018 , respectively. Percentage of Total Net Sales Accounts and Other Receivables Three Months Ended March 31, March 31, December 31, 2019 2018 (in millions) GM 10 % 11 % $ 252 $ 169 VW 8 % 8 % 134 149 Recently adopted accounting pronouncements —Aptiv adopted ASU 2016-02, Leases , in the first quarter of 2019 using the optional transition method. This guidance requires lessees to recognize a lease liability and a right-of-use asset for all leases, with the exception of short-term leases with terms of twelve months or less. The lease liability represents the lessee’s obligation to make lease payments arising from a lease, and is measured as the present value of the lease payments. The right-of-use asset represents the lessee’s right to use a specified asset for the lease term, and is measured at the lease liability amount, adjusted for lease prepayment, lease incentives received and the lessee’s initial direct costs. Under the optional transition method, the Company’s reporting for the comparative periods in the consolidated financial statements will continue to be in accordance with ASC Topic 840, Leases (“ASC 840”). The adoption of this guidance resulted in the recording of operating lease right-of-use assets and operating lease liabilities to the consolidated balance sheet as of March 31, 2019 and did not have a significant impact on the Company’s results of operations or cash flows. As permitted by ASU 2016-02, Aptiv elected to apply the package of practical expedients allowing the Company to not reassess whether any expired or existing contracts are, or contain, leases, the lease classification for any expired or existing leases or initial direct costs for any expired or existing leases. Aptiv did not elect to apply the hindsight practical expedient allowing the Company to use hindsight when determining the lease term (i.e., evaluating the Company’s option to renew or terminate the lease or to purchase the underlying asset) and assessing impairment of expired or existing leases. Aptiv elected to apply the land easements practical expedient allowing the Company to not assess whether any expired or existing land easements are, or contain, leases if they were not previously accounted for as leases under ASC 840. Instead, Aptiv will continue to apply its existing accounting policies to historical land easements. Aptiv also elected to apply the short-term lease exception, therefore Aptiv will not record a right-of-use asset or corresponding lease liability for leases with a term of twelve months or less and instead will recognize a single lease cost allocated over the lease term, generally on a straight-line basis. Additionally, Aptiv elected the practical expedient to not separate lease components from non-lease components and instead accounts for both as a single lease component for all asset classes. Refer to Note 22. Leases for additional information. Aptiv adopted ASU 2017-12, Derivatives and Hedging—Targeted Improvements to Accounting for Hedging Activities , in the first quarter of 2019. This guidance expands and refines the application of hedge accounting for both non-financial and financial risk components and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The adoption of this guidance did not have a significant impact on Aptiv’s financial statements. Refer to Note 14. Derivatives and Hedging Activities for further information regarding derivatives. Aptiv adopted ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income , in the first quarter of 2019. This guidance allows for the elimination of the stranded income tax effects resulting from the enactment of the Tax Cuts and Jobs Act (the “Tax Legislation”) through a reclassification from accumulated other comprehensive income (“OCI”) to retained earnings. Upon adoption, Aptiv recorded an increase to retained earnings of $9 million and a corresponding decrease to accumulated OCI during the three months ended March 31, 2019 . Recently issued accounting pronouncements not yet adopted —In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . This guidance requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. This guidance also requires enhanced disclosures regarding significant estimates and judgments used in estimating credit losses. The new guidance is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment

Inventories

Inventories	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories are stated at the lower of cost, determined on a first-in, first-out basis, or net realizable value, including direct material costs and direct and indirect manufacturing costs. A summary of inventories is shown below: March 31, December 31, (in millions) Productive material $ 761 $ 724 Work-in-process 107 101 Finished goods 458 452 Total $ 1,326 $ 1,277

Assets

Assets	3 Months Ended
	Mar. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Assets	ASSETS Other current assets consisted of the following: March 31, December 31, (in millions) Value added tax receivable $ 195 $ 185 Prepaid insurance and other expenses 86 72 Reimbursable engineering costs 44 47 Notes receivable 35 43 Income and other taxes receivable 42 73 Deposits to vendors 7 4 Derivative financial instruments (Note 14) 5 6 Capitalized upfront fees (Note 21) 15 8 Other 6 7 Total $ 435 $ 445 Other long-term assets consisted of the following: March 31, December 31, (in millions) Deferred income taxes, net $ 152 $ 143 Unamortized Revolving Credit Facility debt issuance costs (Note 8) 5 6 Income and other taxes receivable 27 6 Reimbursable engineering costs 166 137 Value added tax receivable 39 38 Equity investments (Note 17) 94 72 Derivative financial instruments (Note 14) 4 2 Capitalized upfront fees (Note 21) 67 64 Other 55 53 Total $ 609 $ 521

Liabilities

Liabilities	3 Months Ended
	Mar. 31, 2019
Other Liabilities Disclosure [Abstract]
Liabilities	LIABILITIES Accrued liabilities consisted of the following: March 31, December 31, (in millions) Payroll-related obligations $ 241 $ 235 Employee benefits, including current pension obligations 55 96 Income and other taxes payable 189 187 Warranty obligations (Note 6) 30 33 Restructuring (Note 7) 59 55 Customer deposits 61 36 Derivative financial instruments (Note 14) 8 19 Accrued interest 24 42 Deferred compensation related to nuTonomy acquisition 38 31 Operating lease liabilities (Note 22) 93 — Other 334 320 Total $ 1,132 $ 1,054 Other long-term liabilities consisted of the following: March 31, December 31, (in millions) Environmental (Note 10) $ 4 $ 3 Extended disability benefits 5 5 Warranty obligations (Note 6) 17 17 Restructuring (Note 7) 39 49 Payroll-related obligations 10 10 Accrued income taxes 170 201 Deferred income taxes, net 242 233 Derivative financial instruments (Note 14) 3 9 Deferred compensation related to nuTonomy acquisition 22 18 Other 73 88 Total $ 585 $ 633

Warranty Obligations

Warranty Obligations	3 Months Ended
	Mar. 31, 2019
Product Warranties Disclosures [Abstract]
Warranty Obligations	WARRANTY OBLIGATIONS Expected warranty costs for products sold are recognized principally at the time of sale of the product based on an estimate of the amount that eventually will be required to settle such obligations. These accruals are based on factors such as past experience, production changes, industry developments and various other considerations. The estimated costs related to product recalls based on a formal campaign soliciting return of that product are accrued at the time an obligation becomes probable and can be reasonably estimated. These estimates are adjusted from time to time based on facts and circumstances that impact the status of existing claims. Aptiv has recognized its best estimate for its total aggregate warranty reserves, including product recall costs, across all of its operating segments as of March 31, 2019 . The Company estimates the reasonably possible amount to ultimately resolve all matters in excess of the recorded reserves as of March 31, 2019 to be zero to $15 million . The table below summarizes the activity in the product warranty liability for the three months ended March 31, 2019 : Warranty Obligations (in millions) Accrual balance at beginning of period $ 50 Provision for estimated warranties incurred during the period 8 Changes in estimate for pre-existing warranties — Settlements made during the period (in cash or in kind) (11 ) Foreign currency translation and other — Accrual balance at end of period $ 47

Restructuring

Restructuring	3 Months Ended
	Mar. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring	RESTRUCTURING Aptiv’s restructuring activities are undertaken as necessary to implement management’s strategy, streamline operations, take advantage of available capacity and resources, and ultimately achieve net cost reductions. These activities generally relate to the realignment of existing manufacturing capacity and closure of facilities and other exit or disposal activities, as it relates to executing Aptiv’s strategy, either in the normal course of business or pursuant to significant restructuring programs. As part of Aptiv’s continued efforts to optimize its cost structure, it has undertaken several restructuring programs which include workforce reductions as well as plant closures. These programs are primarily focused on the continued rotation of our manufacturing footprint to best cost locations in Europe and on reducing global overhead costs. The Company recorded employee-related and other restructuring charges related to these programs totaling approximately $26 million during the three months ended March 31, 2019 , of which $7 million was recognized for programs focused on the continued rotation of our manufacturing footprint to best cost locations in Europe and reducing overhead costs in the region. During the three months ended March 31, 2018 , Aptiv recorded employee-related and other restructuring charges totaling approximately $20 million , of which $12 million was recognized for programs focused on the continued rotation of our manufacturing footprint to best cost locations in Europe and reducing overhead costs in the region. Restructuring charges for employee separation and termination benefits are paid either over the severance period or in a lump sum in accordance with either statutory requirements or individual agreements. Aptiv incurred cash expenditures related to its restructuring programs of approximately $31 million and $36 million in the three months ended March 31, 2019 and 2018 , respectively. The following table summarizes the restructuring charges recorded for the three months ended March 31, 2019 and 2018 by operating segment: Three Months Ended March 31, 2019 2018 (in millions) Signal and Power Solutions $ 19 $ 18 Advanced Safety and User Experience 7 2 Total $ 26 $ 20 The table below summarizes the activity in the restructuring liability for the three months ended March 31, 2019 : Employee Termination Benefits Liability Other Exit Costs Liability Total (in millions) Accrual balance at January 1, 2019 $ 104 $ — $ 104 Provision for estimated expenses incurred during the period 26 — 26 Payments made during the period (31 ) — (31 ) Foreign currency and other (1 ) — (1 ) Accrual balance at March 31, 2019 $ 98 $ — $ 98

Debt

Debt	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Debt	DEBT The following is a summary of debt outstanding, net of unamortized issuance costs and discounts, as of March 31, 2019 and December 31, 2018 , respectively: March 31, December 31, (in millions) Accounts receivable factoring $ 335 $ 279 Revolving Credit Facility 175 — 3.15%, senior notes, due 2020 (net of $0 and $1 unamortized issuance costs and $0 and $1 discount, respectively) — 648 4.15%, senior notes, due 2024 (net of $3 and $3 unamortized issuance costs and $1 and $1 discount, respectively) 696 696 1.50%, Euro-denominated senior notes, due 2025 (net of $3 and $3 unamortized issuance costs and $2 and $3 discount, respectively) 782 795 4.25%, senior notes, due 2026 (net of $3 and $3 unamortized issuance costs, respectively) 647 647 1.60%, Euro-denominated senior notes, due 2028 (net of $3 and $3 unamortized issuance costs and $1 and $1 discount, respectively) 558 568 4.35%, senior notes, due 2029 (net of $2 and $0 unamortized issuance costs, respectively) 298 — 4.40%, senior notes, due 2046 (net of $3 and $3 unamortized issuance costs and $2 and $2 discount, respectively) 295 295 5.40%, senior notes, due 2049 (net of $3 and $0 unamortized issuance costs and $2 and $0 discount, respectively) 345 — Tranche A Term Loan, due 2021 (net of $1 and $1 unamortized issuance costs, respectively) 379 384 Finance leases and other 27 32 Total debt 4,537 4,344 Less: current portion (542 ) (306 ) Long-term debt $ 3,995 $ 4,038 Credit Agreement Aptiv PLC and its wholly-owned subsidiary Aptiv Corporation entered into a credit agreement (the “Credit Agreement”) with JPMorgan Chase Bank, N.A., as administrative agent (the “Administrative Agent”), under which it maintains senior unsecured credit facilities currently consisting of a term loan (the “Tranche A Term Loan”) and a revolving credit facility of $2.0 billion (the “Revolving Credit Facility”). The Credit Agreement was entered into in March 2011 and has been subsequently amended and restated on several occasions, most recently on August 17, 2016. The 2016 amendment extended the maturity of the Revolving Credit Facility and the Tranche A Term Loan from 2018 to 2021, increased the capacity of the Revolving Credit Facility from $1.5 billion to $2.0 billion and permitted Aptiv PLC to act as a borrower on the Revolving Credit Facility. The Tranche A Term Loan and the Revolving Credit Facility mature on August 17, 2021. Beginning in the fourth quarter of 2017, Aptiv was obligated to begin making quarterly principal payments throughout the term of the Tranche A Term Loan, according to the amortization schedule in the Credit Agreement. The Credit Agreement also contains an accordion feature that permits Aptiv to increase, from time to time, the aggregate borrowing capacity under the Credit Agreement by up to an additional $1 billion (or a greater amount based upon a formula set forth in the Credit Agreement) upon Aptiv’s request, the agreement of the lenders participating in the increase, and the approval of the Administrative Agent and existing lenders. As of March 31, 2019 , $175 million was outstanding under the Revolving Credit Facility and less than $1 million in letters of credit were issued under the Credit Agreement. Letters of credit issued under the Credit Agreement reduce availability under the Revolving Credit Facility. Loans under the Credit Agreement bear interest, at Aptiv’s option, at either (a) the Administrative Agent’s Alternate Base Rate (“ABR” as defined in the Credit Agreement) or (b) the London Interbank Offered Rate (the “Adjusted LIBO Rate” as defined in the Credit Agreement) (“LIBOR”) plus in either case a percentage per annum as set forth in the table below (the “Applicable Rate”). The Applicable Rates under the Credit Agreement on the specified dates are set forth below: March 31, 2019 December 31, 2018 LIBOR plus ABR plus LIBOR plus ABR plus Revolving Credit Facility 1.10 % 0.10 % 1.10 % 0.10 % Tranche A Term Loan 1.25 % 0.25 % 1.25 % 0.25 % The Applicable Rate under the Credit Agreement may increase or decrease from time to time based on changes in the Company’s credit ratings. Accordingly, the interest rate will fluctuate during the term of the Credit Agreement based on changes in the ABR, LIBOR or future changes in the Company’s corporate credit ratings. The Credit Agreement also requires that Aptiv pay certain facility fees on the Revolving Credit Facility and certain letter of credit issuance and fronting fees. The interest rate period with respect to LIBOR interest rate options can be set at one-, two-, three-, or six-months as selected by Aptiv in accordance with the terms of the Credit Agreement (or other period as may be agreed by the applicable lenders). Aptiv may elect to change the selected interest rate option in accordance with the provisions of the Credit Agreement. As of March 31, 2019 , Aptiv selected the one-month LIBOR interest rate option on the Tranche A Term Loan, and the rate effective as of March 31, 2019 , as detailed in the table below, was based on the Company’s current credit rating and the Applicable Rate for the Credit Agreement: Borrowings as of March 31, 2019 Rates effective as of Applicable Rate (in millions) March 31, 2019 Revolving Credit Facility ABR plus 0.10% $ 25 5.60 % Revolving Credit Facility LIBOR plus 1.10% $ 150 3.60 % Tranche A Term Loan LIBOR plus 1.25% $ 380 3.75 % Borrowings under the Credit Agreement are prepayable at Aptiv’s option without premium or penalty. The Credit Agreement contains certain covenants that limit, among other things, the Company’s (and the Company’s subsidiaries’) ability to incur certain additional indebtedness or liens or to dispose of substantially all of its assets. In addition, the Credit Agreement requires that the Company maintain a consolidated leverage ratio (the ratio of Consolidated Total Indebtedness to Consolidated EBITDA, each as defined in the Credit Agreement) of less than 3.50 to 1.0 . The Credit Agreement also contains events of default customary for financings of this type. The Company was in compliance with the Credit Agreement covenants as of March 31, 2019 . As of March 31, 2019 , all obligations under the Credit Agreement were borrowed by Aptiv Corporation and jointly and severally guaranteed by its direct and indirect parent companies, subject to certain exceptions set forth in the Credit Agreement. Refer to Note 19. Supplemental Guarantor and Non-Guarantor Condensed Consolidating Financial Statements for additional information. Senior Unsecured Notes On March 3, 2014, Aptiv Corporation issued $700 million in aggregate principal amount of 4.15% senior unsecured notes due 2024 (the “2014 Senior Notes”) in a transaction registered under the Securities Act of 1933, as amended (the “Securities Act”). The 2014 Senior Notes were priced at 99.649% of par, resulting in a yield to maturity of 4.193% . The proceeds were primarily utilized to redeem $500 million of 5.875% senior unsecured notes due 2019 and to repay a portion of the Tranche A Term Loan. Aptiv paid approximately $6 million of issuance costs in connection with the 2014 Senior Notes. Interest is payable semi-annually on March 15 and September 15 of each year to holders of record at the close of business on March 1 or September 1 immediately preceding the interest payment date. On March 10, 2015, Aptiv PLC issued €700 million in aggregate principal amount of 1.50% Euro-denominated senior unsecured notes due 2025 (the “2015 Euro-denominated Senior Notes”) in a transaction registered under the Securities Act. The 2015 Euro-denominated Senior Notes were priced at 99.54% of par, resulting in a yield to maturity of 1.55% . The proceeds were primarily utilized to redeem $500 million of 6.125% senior unsecured notes due 2021 , and to fund growth initiatives, such as acquisitions, and share repurchases. Aptiv incurred approximately $5 million of issuance costs in connection with the 2015 Euro-denominated Senior Notes. Interest is payable annually on March 10. The Company has designated the 2015 Euro-denominated Senior Notes as a net investment hedge of the foreign currency exposure of its investments in certain Euro-denominated wholly-owned subsidiaries. Refer to Note 14. Derivatives and Hedging Activities for further information. On November 19, 2015, Aptiv PLC issued $1.3 billion in aggregate principal amount of senior unsecured notes in a transaction registered under the Securities Act, comprised of $650 million of 3.15% senior unsecured notes due 2020 (the “3.15% Senior Notes”) and $650 million of 4.25% senior unsecured notes due 2026 (the “4.25% Senior Notes”) (collectively, the “2015 Senior Notes”). The 3.15% Senior Notes were priced at 99.784% of par, resulting in a yield to maturity of 3.197% , and the 4.25% Senior Notes were priced at 99.942% of par, resulting in a yield to maturity of 4.256% . The proceeds were primarily utilized to fund a portion of the cash consideration for the acquisition of HellermannTyton PLC and for general corporate purposes, including the payment of fees and expenses associated with the HellermannTyton PLC acquisition and the related financing transaction. Aptiv incurred approximately $8 million of issuance costs in connection with the 2015 Senior Notes. Interest on the 3.15% Senior Notes was payable semi-annually on May 19 and November 19 of each year to holders of record at the close of business on May 4 or November 4 immediately preceding the interest payment date. Interest on the 4.25% Senior Notes is payable semi-annually on January 15 and July 15 of each year to holders of record at the close of business on January 1 or July 1 immediately preceding the interest payment date. In March 2019, Aptiv redeemed for cash the entire $650 million aggregate principal amount outstanding of the 3.15% Senior Notes, financed by the proceeds received from the issuance of the 2019 Senior Notes, as defined below. As a result of the redemption of the 3.15% Senior Notes, Aptiv recognized a loss on debt extinguishment of approximately $6 million during the three months ended March 31, 2019 within other expense, net in the consolidated statement of operations. On September 15, 2016, Aptiv PLC issued €500 million in aggregate principal amount of 1.60% Euro-denominated senior unsecured notes due 2028 (the “2016 Euro-denominated Senior Notes”) in a transaction registered under the Securities Act. The 2016 Euro-denominated Senior Notes were priced at 99.881% of par, resulting in a yield to maturity of 1.611% . The proceeds, together with proceeds from the 2016 Senior Notes described below, were utilized to redeem the $800 million of 5.00% senior unsecured notes due 2023 . Aptiv incurred approximately $4 million of issuance costs in connection with the 2016 Euro-denominated Senior Notes. Interest is payable annually on September 15. The Company has designated the 2016 Euro-denominated Senior Notes as a net investment hedge of the foreign currency exposure of its investments in certain Euro-denominated wholly-owned subsidiaries. Refer to Note 14. Derivatives and Hedging Activities for further information. On September 20, 2016, Aptiv PLC issued $300 million in aggregate principal amount of 4.40% senior unsecured notes due 2046 (the “2016 Senior Notes”) in a transaction registered under the Securities Act. The 2016 Senior Notes were priced at 99.454% of par, resulting in a yield to maturity of 4.433% . The proceeds, together with proceeds from the 2016 Euro-denominated Senior Notes, were utilized to redeem the $800 million of 5.00% senior unsecured notes due 2023 . Aptiv incurred approximately $3 million of issuance costs in connection with the 2016 Senior Notes. Interest is payable semi-annually on April 1 and October 1 of each year to holders of record at the close of business on March 15 or September 15 immediately preceding the interest payment date. On March 14, 2019, Aptiv PLC issued $650 million in aggregate principal amount of senior unsecured notes in a transaction registered under the Securities Act, comprised of $300 million of 4.35% senior unsecured notes due 2029 (the “4.35% Senior Notes”) and $350 million of 5.40% senior unsecured notes due 2049 (the “5.40% Senior Notes”) (collectively, the “2019 Senior Notes”). The 4.35% Senior Notes were priced at 99.879% of par, resulting in a yield to maturity of 4.365% , and the 5.40% Senior Notes were priced at 99.558% of par, resulting in a yield to maturity of 5.430% . The proceeds were utilized to redeem the 3.15% Senior Notes. Aptiv incurred approximately $5 million of issuance costs in connection with the 2019 Senior Notes. Interest on the 2019 Senior Notes is payable semi-annually on March 15 and September 15 of each year to holders of record at the close of business on March 1 or September 1 immediately preceding the interest payment date. Although the specific terms of each indenture governing each series of senior notes vary, the indentures contain certain restrictive covenants, including with respect to Aptiv’s (and Aptiv’s subsidiaries) ability to incur liens, enter into sale and leaseback transactions and merge with or into other entities. As of March 31, 2019 , the Company was in compliance with the provisions of all series of the outstanding senior notes. The 2014 Senior Notes issued by Aptiv Corporation are fully and unconditionally guaranteed, jointly and severally, by Aptiv PLC and by certain of Aptiv PLC’s direct and indirect subsidiaries, which are directly or indirectly 100% owned by Aptiv PLC, subject to customary release provisions (other than in the case of Aptiv PLC). The 2015 Euro-denominated Senior Notes, 4.25% Senior Notes, 2016 Euro-denominated Senior Notes, 2016 Senior Notes and 2019 Senior Notes issued by Aptiv PLC are fully and unconditionally guaranteed, jointly and severally, by certain of Aptiv PLC’s direct and indirect subsidiaries (including Aptiv Corporation), which are directly or indirectly 100% owned by Aptiv PLC, subject to customary release provisions. Refer to Note 19. Supplemental Guarantor and Non-Guarantor Condensed Consolidating Financial Statements for additional information. Other Financing Receivable factoring —Aptiv maintains a €300 million European accounts receivable factoring facility that is available on a committed basis. This facility is accounted for as short-term debt and borrowings are subject to the availability of eligible accounts receivable. Collateral is not required related to these trade accounts receivable. This program renews on a non-committed, indefinite basis unless terminated by either party. Borrowings bear interest at Euro Interbank Offered Rate (“EURIBOR”) plus 0.42% for borrowings denominated in Euros. The rate effective on amounts outstanding as of March 31, 2019 was 0.42% . As of March 31, 2019 and December 31, 2018 , Aptiv had $335 million and $279 million , respectively, outstanding on the European accounts receivable factoring facility. Finance leases and other —As of March 31, 2019 and December 31, 2018 , approximately $27 million and $32 million , respectively, of other debt primarily issued by certain non-U.S. subsidiaries and finance lease obligations were outstanding. Interest —Cash paid for interest related to debt outstanding totaled $55 million and $45 million for the three months ended March 31, 2019 and 2018 , respectively. Letter of credit facilities —In addition to the letters of credit issued under the Credit Agreement, Aptiv had approximately $2 million and $2 million outstanding through other letter of credit facilities as of March 31, 2019 and December 31, 2018

Pension Benefits

Pension Benefits	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Pension Benefits	PENSION BENEFITS Certain of Aptiv’s non-U.S. subsidiaries sponsor defined benefit pension plans, which generally provide benefits based on negotiated amounts for each year of service. Aptiv’s primary non-U.S. plans are located in France, Germany, Mexico, Portugal and the U.K. The U.K. and certain Mexican plans are funded. In addition, Aptiv has defined benefit plans in South Korea, Turkey and Italy for which amounts are payable to employees immediately upon separation. The obligations for these plans are recorded over the requisite service period. Aptiv sponsors a Supplemental Executive Retirement Program (“SERP”) for those employees who were U.S. executives of DPHH prior to September 30, 2008 and were still U.S. executives of the Company on October 7, 2009, the effective date of the program. This program is unfunded. Executives receive benefits over 5 years after an involuntary or voluntary separation from Aptiv. The SERP is closed to new members. The amounts shown below reflect the defined benefit pension expense for the three months ended March 31, 2019 and 2018 : Non-U.S. Plans U.S. Plans Three Months Ended March 31, 2019 2018 2019 2018 (in millions) Service cost $ 5 $ 5 $ — $ — Interest cost 7 7 — — Expected return on plan assets (5 ) (6 ) — — Curtailment loss — 1 — — Amortization of actuarial losses 3 4 — — Net periodic benefit cost $ 10 $ 11 $ — $ — Other postretirement benefit obligations were approximately $3 million and $3 million at March 31, 2019 and December 31, 2018

Commitments And Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Ordinary Business Litigation Aptiv is from time to time subject to various legal actions and claims incidental to its business, including those arising out of alleged defects, alleged breaches of contracts, product warranties, intellectual property matters, and employment-related matters. It is the opinion of Aptiv that the outcome of such matters will not have a material adverse impact on the consolidated financial position, results of operations, or cash flows of Aptiv. With respect to warranty matters, although Aptiv cannot ensure that the future costs of warranty claims by customers will not be material, Aptiv believes its established reserves are adequate to cover potential warranty settlements. Brazil Matters Aptiv conducts business operations in Brazil that are subject to the Brazilian federal labor, social security, environmental, tax and customs laws, as well as a variety of state and local laws. While Aptiv believes it complies with such laws, they are complex, subject to varying interpretations, and the Company is often engaged in litigation with government agencies regarding the application of these laws to particular circumstances. As of March 31, 2019 , the majority of claims asserted against Aptiv in Brazil relate to such litigation. The remaining claims in Brazil relate to commercial and labor litigation with private parties. As of March 31, 2019 , claims totaling approximately $145 million (using March 31, 2019 foreign currency rates) have been asserted against Aptiv in Brazil. As of March 31, 2019 , the Company maintains accruals for these asserted claims of $30 million (using March 31, 2019 foreign currency rates). The amounts accrued represent claims that are deemed probable of loss and are reasonably estimable based on the Company’s analyses and assessment of the asserted claims and prior experience with similar matters. While the Company believes its accruals are adequate, the final amounts required to resolve these matters could differ materially from the Company’s recorded estimates and Aptiv’s results of operations could be materially affected. The Company estimates the reasonably possible loss in excess of the amounts accrued related to these claims to be zero to $115 million . Environmental Matters Aptiv is subject to the requirements of U.S. federal, state, local and non-U.S. environmental and safety and health laws and regulations. As of March 31, 2019 and December 31, 2018 , the undiscounted reserve for environmental investigation and remediation was approximately $5 million (of which $1 million was recorded in accrued liabilities and $4 million was recorded in other long-term liabilities) and $4 million (of which $1 million was recorded in accrued liabilities and $3 million was recorded in other long-term liabilities), respectively. Aptiv cannot ensure that environmental requirements will not change or become more stringent over time or that its eventual environmental remediation costs and liabilities will not exceed the amount of its current reserves. In the event that such liabilities were to significantly exceed the amounts recorded, Aptiv’s results of operations could be materially affected. At March 31, 2019

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES At the end of each interim period, the Company makes its best estimate of the annual expected effective income tax rate and applies that rate to its ordinary year-to-date earnings or loss. The income tax provision or benefit related to unusual or infrequent items, if applicable, that will be separately reported or reported net of their related tax effects are individually computed and recognized in the interim period in which those items occur. In addition, the effect of changes in enacted tax laws or rates, tax status, judgment on the realizability of a beginning-of-the-year deferred tax asset in future years or income tax contingencies is recognized in the interim period in which the change occurs. The computation of the annual expected effective income tax rate at each interim period requires certain estimates and assumptions including, but not limited to, the expected pre-tax income (or loss) for the year, projections of the proportion of income (and/or loss) earned and taxed in respective jurisdictions, permanent and temporary differences, and the likelihood of the realizability of deferred tax assets generated in the current year. Jurisdictions with a projected loss for the year or a year-to-date loss for which no tax benefit or expense can be recognized due to a valuation allowance are excluded from the estimated annual effective tax rate. The impact of such an exclusion could result in a higher or lower effective tax rate during a particular quarter, based upon the composition and timing of actual earnings compared to annual projections. The estimates used to compute the provision or benefit for income taxes may change as new events occur, additional information is obtained or as our tax environment changes. To the extent that the expected annual effective income tax rate changes, the effect of the change on prior interim periods is included in the income tax provision in the period in which the change in estimate occurs. The Company’s income tax expense and effective tax rate for the three months ended March 31, 2019 and 2018 were as follows: Three Months Ended March 31, 2019 2018 (dollars in millions) Income tax expense $ 33 $ 59 Effective tax rate 12 % 16 % The Company’s tax rate is affected by the fact that its parent entity was a U.K. resident taxpayer and became an Irish resident taxpayer in April 2018, the tax rates in Ireland, the U.K. and other jurisdictions in which the Company operates, the relative amount of income earned by jurisdiction and the relative amount of losses or income for which no tax benefit or expense was recognized due to a valuation allowance. The Company’s effective tax rate was impacted by favorable changes in geographic income mix in 2019 as compared to 2018, primarily due to changes in the underlying business operations and the receipt of certain tax incentives and holidays that reduced the effective tax rate for certain subsidiaries below the statutory rate during the three months ended March 31, 2019 . The Company’s effective tax rate for the three months ended March 31, 2019 also includes net discrete tax benefits of $10 million , primarily related to changes in reserves and provision to return adjustments. The effective tax rate for the three months ended March 31, 2018 includes net discrete tax benefits of $1 million , primarily related to changes in reserves, offset by provision to return adjustments. The Tax Legislation was enacted in the U.S. on December 22, 2017, significantly revising the U.S. corporate income tax by, among other things, lowering corporate income tax rates and imposing a one-time repatriation tax on deemed repatriated earnings of foreign subsidiaries. Pursuant to ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 (“ASU 2018-05”), the Company recognized the provisional effects of the enactment of the Tax Legislation of approximately $50 million during the year ended December 31, 2017 for which measurement could be reasonably estimated. The impact was primarily the result of increased tax expense due to the one-time deemed repatriation tax and a reduction of our foreign tax credit, partially offset by the favorable impact of the reduced tax rate on the Company’s net deferred tax liabilities. Pursuant to ASU 2018-05, adjustments to the provisional amounts recorded by the Company as of December 31, 2017 identified within a subsequent measurement period of up to one year from the enactment date were included as an adjustment to tax expense from continuing operations in the period the amounts were determined. During the year ended December 31, 2018, the Company recorded approximately $30 million to income tax expense as an adjustment to the provisional amounts, primarily related to a reduction of our foreign tax credit as a result of subsequently issued regulatory guidance. Also as a result of the enactment of the Tax Legislation, the Company reclassified $9 million from accumulated OCI to retained earnings, in accordance with ASU 2018-02, which the Company adopted in the first quarter of 2019, as further described in Note 2. Significant Accounting Policies. The accounting for the Tax Legislation was finalized in the fourth quarter of 2018. Aptiv PLC was a U.K. resident taxpayer, and became an Irish resident taxpayer in April 2018. As the Company is not a domestic corporation for U.S. federal income tax purposes, it is not subject to U.S. tax on remitted foreign earnings. Aptiv PLC was generally not subject to U.K. tax on the repatriation of foreign earnings and, as a result of its capital structure, believes it will also not be subject to Irish tax on the repatriation of foreign earnings. Cash paid or withheld for income taxes was $36 million and $52 million for the three months ended March 31, 2019 and 2018 , respectively. Intellectual Property Transfer During the year ended December 31, 2018, the Company finalized changes to its corporate entity operating structure, including transferring certain intellectual property amongst certain of its subsidiaries, primarily to align corporate entities with the Company’s evolving operations and business model. The transfer of assets occurred between wholly-owned legal entities in different U.S. and non-U.S. tax jurisdictions. As the impact of the transfer was the result of an intra-entity transaction, the resulting gain on the transfer was eliminated for purposes of the consolidated financial statements. However, the transferring entity recognized a gain on the transfer of assets that was subject to income tax in its local jurisdiction. In accordance with ASU 2016-16, Accounting for Income Taxes: Intra-Entity Asset Transfers of Assets Other than Inventory , the income tax expense recorded as a result of the intra-entity transfer of the intellectual property was approximately $30 million

Shareholders' Equity And Net In

Shareholders' Equity And Net Income Per Share	3 Months Ended
	Mar. 31, 2019
Shareholders' Equity and Net Income Per Share Note [Abstract]
Shareholders' Equity And Net Income Per Share	SHAREHOLDERS’ EQUITY AND NET INCOME PER SHARE Net Income Per Share Basic net income per share is computed by dividing net income attributable to Aptiv by the weighted average number of ordinary shares outstanding during the period. Diluted net income per share reflects the weighted average dilutive impact of all potentially dilutive securities from the date of issuance and is computed using the treasury stock method by dividing net income attributable to Aptiv by the diluted weighted average number of ordinary shares outstanding during the period. For all periods presented, the calculation of net income per share contemplates the dilutive impacts, if any, of the Company’s share-based compensation plans. Refer to Note 18. Share-Based Compensation for additional information. Weighted Average Shares The following table illustrates net income per share attributable to Aptiv and the weighted average shares outstanding used in calculating basic and diluted income per share: Three Months Ended March 31, 2019 2018 (in millions, except per share data) Numerator: Net income attributable to Aptiv $ 240 $ 307 Denominator: Weighted average ordinary shares outstanding, basic 259.08 265.69 Dilutive shares related to restricted stock units (“RSUs”) 0.47 0.75 Weighted average ordinary shares outstanding, including dilutive shares 259.55 266.44 Net income per share attributable to Aptiv: Basic $ 0.93 $ 1.16 Diluted $ 0.92 $ 1.15 Anti-dilutive securities share impact — — Share Repurchase Programs In April 2016, the Board of Directors authorized a share repurchase program of up to $1.5 billion of ordinary shares, which commenced in September 2016. This share repurchase program provides for share purchases in the open market or in privately negotiated transactions, depending on share price, market conditions and other factors, as determined by the Company. A summary of the ordinary shares repurchased during the three months ended March 31, 2019 and 2018 is as follows: Three Months Ended March 31, 2019 2018 Total number of shares repurchased 2,840,079 1,676,144 Average price paid per share $ 79.57 $ 89.17 Total (in millions) $ 226 $ 149 As of March 31, 2019 , approximately $264 million of share repurchases remained available under the April 2016 share repurchase program. All repurchased shares were retired, and are reflected as a reduction of ordinary share capital for the par value of the shares, with the excess applied as reductions to additional paid-in-capital and retained earnings. New Share Repurchase Program In January 2019, the Board of Directors authorized a new share repurchase program of up to $2.0 billion of ordinary shares. This share repurchase program provides for share purchases in the open market or in privately negotiated transactions, depending on share price, market conditions and other factors, as determined by the Company. This program will commence following the completion of the Company’s April 2016 share repurchase program described above. Dividends The Company has declared and paid cash dividends per ordinary share during the periods presented as follows: Dividend Amount Per Share (in millions) 2019: First quarter $ 0.22 $ 57 Total $ 0.22 $ 57 2018: Fourth quarter $ 0.22 $ 58 Third quarter 0.22 58 Second quarter 0.22 58 First quarter 0.22 59 Total $ 0.88 $ 233 In addition, in April 2019, the Board of Directors declared a regular quarterly cash dividend of $0.22

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Changes in Accumulated Other Comprehensive Income	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The changes in accumulated other comprehensive income (loss) attributable to Aptiv (net of tax) for the three months ended March 31, 2019 and 2018 are shown below. Three Months Ended March 31, 2019 2018 (in millions) Foreign currency translation adjustments: Balance at beginning of period $ (555 ) $ (369 ) Aggregate adjustment for the period (1) — 57 Balance at end of period (555 ) (312 ) Gains (losses) on derivatives: Balance at beginning of period (35 ) 4 Other comprehensive income (loss) before reclassifications (net tax effect of $0 and $4) 16 (18 ) Reclassification to income (net tax effect of $0 and $1) 3 (5 ) Adoption of ASU 2018-02 (Note 2) (8 ) — Balance at end of period (24 ) (19 ) Pension and postretirement plans: Balance at beginning of period (104 ) (106 ) Other comprehensive income (loss) before reclassifications (net tax effect of $0 and $1) — (3 ) Reclassification to income (net tax effect of $1 and $0) 2 4 Adoption of ASU 2018-02 (Note 2) (1 ) — Balance at end of period (103 ) (105 ) Accumulated other comprehensive loss, end of period $ (682 ) $ (436 ) (1) Includes gains of $23 million and losses of $37 million for the three months ended March 31, 2019 and 2018 , respectively, related to non-derivative net investment hedges. Refer to Note 14. Derivatives and Hedging Activities for further description of these hedges. Reclassifications from accumulated other comprehensive income (loss) to income for the three months ended March 31, 2019 and 2018 were as follows: Reclassification Out of Accumulated Other Comprehensive Income (Loss) Details About Accumulated Other Comprehensive Income Components Three Months Ended March 31, Affected Line Item in the Statement of Operations 2019 2018 (in millions) Gains (losses) on derivatives: Commodity derivatives $ (2 ) $ 9 Cost of sales Foreign currency derivatives (1 ) (5 ) Cost of sales (3 ) 4 Income before income taxes — 1 Income tax expense (3 ) 5 Net income — — Net income attributable to noncontrolling interest $ (3 ) $ 5 Net income attributable to Aptiv Pension and postretirement plans: Actuarial losses $ (3 ) $ (4 ) Other income (expense), net (1) (3 ) (4 ) Income before income taxes 1 — Income tax expense (2 ) (4 ) Net income — — Net income attributable to noncontrolling interest $ (2 ) $ (4 ) Net income attributable to Aptiv Total reclassifications for the period $ (5 ) $ 1 (1)

Derivatives And Hedging Activit

Derivatives And Hedging Activities	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVES AND HEDGING ACTIVITIES Cash Flow Hedges Aptiv is exposed to market risk, such as fluctuations in foreign currency exchange rates, commodity prices and changes in interest rates, which may result in cash flow risks. To manage the volatility relating to these exposures, Aptiv aggregates the exposures on a consolidated basis to take advantage of natural offsets. For exposures that are not offset within its operations, Aptiv enters into various derivative transactions pursuant to its risk management policies, which prohibit holding or issuing derivative financial instruments for speculative purposes, and designation of derivative instruments is performed on a transaction basis to support hedge accounting. The changes in fair value of these hedging instruments are offset in part or in whole by corresponding changes in the fair value or cash flows of the underlying exposures being hedged. Aptiv assesses the initial and ongoing effectiveness of its hedging relationships in accordance with its documented policy. As of March 31, 2019 , the Company had the following outstanding notional amounts related to commodity and foreign currency forward and option contracts designated as cash flow hedges that were entered into to hedge forecasted exposures: Commodity Quantity Hedged Unit of Measure Notional Amount (in thousands) (in millions) Copper 76,959 pounds $ 225 Foreign Currency Quantity Hedged Unit of Measure Notional Amount (Approximate USD Equivalent) (in millions) Mexican Peso 14,183 MXN $ 730 Chinese Yuan Renminbi 3,284 RMB 490 Polish Zloty 505 PLN 130 Euro 62 EUR 70 New Turkish Lira 50 TRY 10 As of March 31, 2019 , Aptiv has entered into derivative instruments to hedge cash flows extending out to March 2021. Gains and losses on derivatives qualifying as cash flow hedges are recorded in accumulated OCI, to the extent that hedges are effective, until the underlying transactions are recognized in earnings. Unrealized amounts in accumulated OCI will fluctuate based on changes in the fair value of hedge derivative contracts at each reporting period. Net losses on cash flow hedges included in accumulated OCI as of March 31, 2019 were approximately $2 million (approximately $2 million , net of tax). Of this total, approximately $3 million of losses are expected to be included in cost of sales within the next 12 months and approximately $1 million of gains are expected to be included in cost of sales in subsequent periods. Cash flow hedges are discontinued when Aptiv determines it is no longer probable that the originally forecasted transactions will occur. Cash flows from derivatives used to manage commodity and foreign exchange risks designated as cash flow hedges are classified as operating activities within the consolidated statement of cash flows. Net Investment Hedges The Company is also exposed to the risk that adverse changes in foreign currency exchange rates could impact its net investment in non-U.S. subsidiaries. To manage this risk, the Company designates certain qualifying derivative and non-derivative instruments, including foreign currency forward contracts and foreign currency-denominated debt, as net investment hedges of certain non-U.S. subsidiaries. The gains or losses on instruments designated as net investment hedges are recognized within OCI to offset changes in the value of the net investment in these foreign currency-denominated operations. Gains and losses reported in accumulated OCI are reclassified to earnings only when the related currency translation adjustments are required to be reclassified, usually upon sale or liquidation of the investment. Cash flows from derivatives designated as net investment hedges are classified as investing activities within the consolidated statement of cash flows. Since 2016, the Company has entered into a series of forward contracts, each of which have been designated as net investment hedges of the foreign currency exposure of the Company’s investments in certain Chinese Yuan Renminbi (“RMB”)-denominated subsidiaries. In December 2017, the Company entered into a forward contract with a notional amount of 1.9 billion RMB (approximately $290 million , using December 31, 2017 foreign currency rates), which matured in June 2018 , and the Company paid $10 million at settlement. In June 2018, the Company entered into a forward contract with a notional amount of 486 million RMB (approximately $75 million , using June 30, 2018 foreign currency rates), which matured in December 2018 and the Company received $4 million at settlement. In December 2018, the Company entered into a forward contract with a notional amount of 570 million RMB (approximately $85 million , using December 31, 2018 foreign currency rates), which matured in March 2019 and the Company paid $2 million at settlement. In March 2019, the Company entered into a forward contract with a notional amount of 334 million RMB (approximately $50 million , using March 31, 2019 foreign currency rates), which matures in June 2019 . Refer to the tables below for details of the fair value recorded in the consolidated balance sheet and the effects recorded in the consolidated statement of operations and consolidated statement of comprehensive income related to these derivative instruments. The Company has designated the €700 million 2015 Euro-denominated Senior Notes and the €500 million 2016 Euro-denominated Senior Notes, as more fully described in Note 8. Debt, as net investment hedges of the foreign currency exposure of its investments in certain Euro-denominated subsidiaries. Due to changes in the value of the Euro-denominated debt instruments designated as net investment hedges, during the three months ended March 31, 2019 and 2018 , $23 million of gains and $37 million of losses, respectively, were recognized within the cumulative translation adjustment component of OCI. Cumulative losses included in accumulated OCI on these net investment hedges were $27 million as of March 31, 2019 and $50 million as of December 31, 2018 . Derivatives Not Designated as Hedges In certain occasions the Company enters into certain foreign currency and commodity contracts that are not designated as hedges. When hedge accounting is not applied to derivative contracts, gains and losses are recorded to other income (expense), net and cost of sales in the consolidated statement of operations. In conjunction with the acquisition of KUM, as more fully disclosed in Note 17. Acquisitions and Divestitures, in March 2018, the Company entered into forward contracts, requiring no initial net investment, with notional amounts totaling 559 billion South Korean Won (“KRW”) (approximately $520 million using March 1, 2018 foreign currency rates) to hedge portions of the currency risk associated with the cash payment for the acquisition. Pursuant to the requirements of ASC 815, Derivatives and Hedging , the forwards did not qualify as hedges for accounting purposes, and therefore, changes in the fair value of the forwards were recognized in other income (expense), net. During the three months ended March 31, 2018 , the change in fair value resulted in a pre-tax gain of $11 million included within other income, net in the consolidated statement of operations. In conjunction with the closing of the acquisition, Aptiv settled the forward contracts in the second quarter of 2018. Fair Value of Derivative Instruments in the Balance Sheet The fair value of derivative financial instruments recorded in the consolidated balance sheets as of March 31, 2019 and December 31, 2018 are as follows: Asset Derivatives Liability Derivatives Net Amounts of Assets and (Liabilities) Presented in the Balance Sheet Balance Sheet Location March 31, Balance Sheet Location March 31, March 31, (in millions) Derivatives designated as cash flow hedges: Commodity derivatives Other current assets $ — Accrued liabilities $ 2 Foreign currency derivatives* Other current assets 9 Other current assets 4 $ 5 Foreign currency derivatives* Accrued liabilities 2 Accrued liabilities 8 (6 ) Commodity derivatives Other long-term assets 2 Other long-term liabilities — Foreign currency derivatives* Other long-term assets 3 Other long-term assets 1 2 Foreign currency derivatives* Other long-term liabilities 1 Other long-term liabilities 4 (3 ) Total derivatives designated as hedges $ 17 $ 19 Asset Derivatives Liability Derivatives Net Amounts of Assets and (Liabilities) Presented in the Balance Sheet Balance Sheet Location December 31, Balance Sheet Location December 31, December 31, (in millions) Derivatives designated as cash flow hedges: Commodity derivatives Other current assets $ — Accrued liabilities $ 15 Foreign currency derivatives* Other current assets 9 Other current assets 3 $ 6 Foreign currency derivatives* Accrued liabilities — Accrued liabilities 4 (4 ) Commodity derivatives Other long-term assets — Other long-term liabilities 7 Foreign currency derivatives* Other long-term assets 2 Other long-term assets — 2 Foreign currency derivatives* Other long-term liabilities — Other long-term liabilities 2 (2 ) Total derivatives designated as hedges $ 11 $ 31 * Derivative instruments within this category are subject to master netting arrangements and are presented on a net basis in the consolidated balance sheets in accordance with accounting guidance related to the offsetting of amounts related to certain contracts. The fair value of Aptiv’s derivative financial instruments was in a net liability position as of March 31, 2019 and December 31, 2018 . Effect of Derivatives on the Statement of Operations and Statement of Comprehensive Income The pre-tax effect of derivative financial instruments in the consolidated statement of operations and consolidated statement of comprehensive income for the three months ended March 31, 2019 is as follows: Three Months Ended March 31, 2019 Gain (Loss) Recognized in OCI Loss Reclassified from OCI into Income (in millions) Derivatives designated as cash flow hedges: Commodity derivatives $ 20 $ (2 ) Foreign currency derivatives (2 ) (1 ) Derivatives designated as net investment hedges: Foreign currency derivatives (2 ) — Total $ 16 $ (3 ) Gain Recognized in Income (in millions) Derivatives not designated: Foreign currency derivatives $ — Total $ — The pre-tax effect of derivative financial instruments in the consolidated statement of operations and consolidated statement of comprehensive income for the three months ended March 31, 2018 is as follows: Three Months Ended March 31, 2018 (Loss) Gain Recognized in OCI Gain (Loss) Reclassified from OCI into Income (in millions) Derivatives designated as cash flow hedges: Commodity derivatives $ (17 ) $ 9 Foreign currency derivatives 16 (5 ) Derivatives designated as net investment hedges: Foreign currency derivatives (13 ) — Total $ (14 ) $ 4 Gain Recognized in Income (in millions) Derivatives not designated: Foreign currency derivatives $ 10 Total $ 10 The gain or loss recognized in income for designated and non-designated derivative instruments was recorded to cost of sales and other income (expense), net in the consolidated statements of operations for the three months ended March 31, 2019 and 2018

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Measurements on a Recurring Basis Derivative instruments —All derivative instruments are required to be reported on the balance sheet at fair value unless the transactions qualify and are designated as normal purchases or sales. Changes in fair value are reported currently through earnings unless they meet hedge accounting criteria. Aptiv’s derivative exposures are with counterparties with long-term investment grade credit ratings. Aptiv estimates the fair value of its derivative contracts using an income approach based on valuation techniques to convert future amounts to a single, discounted amount. Estimates of the fair value of foreign currency and commodity derivative instruments are determined using exchange traded prices and rates. Aptiv also considers the risk of non-performance in the estimation of fair value, and includes an adjustment for non-performance risk in the measure of fair value of derivative instruments. The non-performance risk adjustment reflects the credit default spread (“CDS”) applied to the net commodity by counterparty and foreign currency exposures by counterparty. When Aptiv is in a net derivative asset position, the counterparty CDS rates are applied to the net derivative asset position. When Aptiv is in a net derivative liability position, estimates of peer companies’ CDS rates are applied to the net derivative liability position. In certain instances where market data is not available, Aptiv uses management judgment to develop assumptions that are used to determine fair value. This could include situations of market illiquidity for a particular currency or commodity or where observable market data may be limited. In those situations, Aptiv generally surveys investment banks and/or brokers and utilizes the surveyed prices and rates in estimating fair value. As of March 31, 2019 and December 31, 2018 , Aptiv was in a net derivative liability position of $2 million and $20 million , respectively, and no significant adjustments were recorded for nonperformance risk based on the application of peer companies’ CDS rates, evaluation of our own nonperformance risk and because Aptiv’s exposures were to counterparties with investment grade credit ratings. Refer to Note 14. Derivatives and Hedging Activities for further information regarding derivatives. Contingent consideration —The liability for contingent consideration is estimated as of the date of the acquisition and is recorded as part of the purchase price, and is subsequently re-measured to fair value at each reporting date, based on a probability-weighted analysis using a rate that reflects the uncertainty surrounding the expected outcomes, which the Company believes is appropriate and representative of market participant assumptions. The measurement of the liability for contingent consideration is based on significant inputs that are not observable in the market, and is therefore classified as a Level 3 measurement in accordance with ASC Topic 820-10-35. Examples of utilized unobservable inputs are estimated future earnings or milestone achievements of the acquired businesses and applicable discount rates. The estimate of the liability may fluctuate if there are changes in the actual or forecasted inputs utilized or in the discount rates used to determine the present value of contingent future cash flows. As of March 31, 2019 , the range of periods in which the earn-out provisions may be achieved is from 2019 to 2020 . The Company regularly reviews these assumptions and makes adjustments to the fair value measurements as required by facts and circumstances. As of March 31, 2019 and December 31, 2018 , the liability for contingent consideration was $50 million (of which $32 million was classified within other current liabilities and $18 million was classified within other long-term liabilities) and $49 million (of which $16 million was classified within other current liabilities and $33 million was classified within other long-term liabilities), respectively, representing the maximum required amounts to be paid under existing agreements. Adjustments to this liability for interest accretion are recognized in interest expense, and any other changes in the fair value of this liability are recognized within other income (expense), net in the consolidated statement of operations. The changes in the contingent consideration liability classified as a Level 3 measurement for the three months ended March 31, 2019 were as follows: Contingent Consideration Liability (in millions) Fair value at beginning of period $ 49 Additions — Payments — Interest accretion 1 Fair value at end of period $ 50 As of March 31, 2019 and December 31, 2018 , Aptiv had the following assets measured at fair value on a recurring basis: Total Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs (in millions) As of March 31, 2019: Commodity derivatives $ 2 $ — $ 2 $ — Foreign currency derivatives 7 — 7 — Total $ 9 $ — $ 9 $ — As of December 31, 2018: Foreign currency derivatives $ 8 $ — $ 8 $ — Total $ 8 $ — $ 8 $ — As of March 31, 2019 and December 31, 2018 , Aptiv had the following liabilities measured at fair value on a recurring basis: Total Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs (in millions) As of March 31, 2019: Commodity derivatives $ 2 $ — $ 2 $ — Foreign currency derivatives 9 — 9 — Contingent consideration 50 — — 50 Total $ 61 $ — $ 11 $ 50 As of December 31, 2018: Commodity derivatives $ 22 $ — $ 22 $ — Foreign currency derivatives 6 — 6 — Contingent consideration 49 — — 49 Total $ 77 $ — $ 28 $ 49 Non-derivative financial instruments —Aptiv’s non-derivative financial instruments include cash and cash equivalents, accounts and notes receivable, accounts payable, as well as debt, which consists of its accounts receivable factoring arrangement, finance leases and other debt issued by Aptiv’s non-U.S. subsidiaries, the Revolving Credit Facility, the Tranche A Term Loan and all series of outstanding senior notes. The fair value of debt is based on quoted market prices for instruments with public market data or significant other observable inputs for instruments without a quoted public market price (Level 2). As of March 31, 2019 and December 31, 2018 , total debt was recorded at $4,537 million and $4,344 million , respectively, and had estimated fair values of $4,591 million and $4,222 million , respectively. For all other financial instruments recorded at March 31, 2019 and December 31, 2018 , fair value approximates book value. Fair Value Measurements on a Nonrecurring Basis In addition to items that are measured at fair value on a recurring basis, Aptiv also has items in its balance sheet that are measured at fair value on a nonrecurring basis. As these items are not measured at fair value on a recurring basis, they are not included in the tables above. Nonfinancial assets and liabilities that are measured at fair value on a nonrecurring basis include certain long-lived assets, equity investments, intangible assets, asset retirement obligations, share-based compensation and liabilities for exit or disposal activities measured at fair value upon initial recognition. During the three months ended March 31, 2019 and 2018

Other Income, Net

Other Income, Net	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
Other Income, Net	OTHER INCOME, NET Other income (expense), net included: Three Months Ended March 31, 2019 2018 (in millions) Interest income $ 3 $ 5 Loss on extinguishment of debt (6 ) — Components of net periodic benefit cost other than service cost (Note 9) (5 ) (6 ) Benefits associated with acquisitions — 11 Change in fair value of equity investments (Note 17) 19 — Other, net 5 20 Other income, net $ 16 $ 30 As further discussed in Note 17. Acquisitions and Divestitures, during the three months ended March 31, 2019 , Aptiv recorded a pre-tax unrealized gain of $19 million related to increases in fair value of its equity investments without readily determinable fair values. Also, as further discussed in Note 8. Debt, during the three months ended March 31, 2019 , Aptiv redeemed for cash the entire $650 million aggregate principal amount outstanding of the 3.15% Senior Notes, resulting in a loss on debt extinguishment of approximately $6 million . As further discussed in Note 14. Derivatives and Hedging Activities, during the three months ended March 31, 2018 , the Company recorded a gain of $11 million on forward contracts entered into in order to hedge portions of the currency risk associated with the cash payment for the acquisition of KUM, which is reflected within Benefits associated with acquisitions in the above table. Also, during the three months ended March 31, 2018 , Aptiv recorded $3 million

Acquisitions And Divestitures

Acquisitions And Divestitures	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Acquisitions and Divestitures	ACQUISITIONS AND DIVESTITURES Acquisition of Winchester Interconnect On October 24, 2018 , Aptiv acquired 100% of the equity interests of Winchester Interconnect (“Winchester”), a leading provider of custom engineered interconnect solutions for harsh environment applications, for total consideration of $680 million . The results of operations of Winchester are reported within the Signal and Power Solutions segment from the date of acquisition. The Company acquired Winchester utilizing cash on hand and short-term borrowings. The acquisition was accounted for as a business combination, with the total purchase price allocated on a preliminary basis using information available, in the fourth quarter of 2018. Minor adjustments were recorded to the purchase price, goodwill and intangible assets, from the amounts disclosed as of December 31, 2018. These adjustments were not significant for any period presented after the acquisition date. The preliminary purchase price and related allocation to the acquired net assets of Winchester based on their estimated fair values is shown below (in millions): Assets acquired and liabilities assumed Purchase price, cash consideration, net of cash acquired $ 680 Property, plant and equipment $ 31 Intangible assets 226 Other assets, net 25 Identifiable net assets acquired 282 Goodwill resulting from purchase 398 Total purchase price allocation $ 680 Intangible assets include $180 million recognized for the fair value of customer-based assets with estimated useful lives of approximately 9 years, $9 million of technology-related assets with estimated useful lives of approximately 5 years and $37 million recognized for the fair value of the acquired trade name, which has an indefinite useful life. The estimated fair value of these assets was based on third-party valuations and management’s estimates, generally utilizing income and market approaches. Goodwill recognized in this transaction is primarily attributable to synergies expected to arise after the acquisition and the assembled workforce of Winchester, and is not deductible for tax purposes. The purchase price and related allocation are preliminary and could be revised as a result of adjustments made to the purchase price, additional information obtained regarding liabilities assumed, including, but not limited to, contingent liabilities, revisions of provisional estimates of fair values, including, but not limited to, the completion of independent appraisals and valuations related to property, plant and equipment and intangible assets, and certain tax attributes. The pro forma effects of this acquisition would not materially impact the Company’s reported results for any period presented, and as a result no pro forma financial statements were presented. Acquisition of KUM On June 14, 2018 , Aptiv acquired 100% of the equity interests of KUM, a specialized manufacturer of connectors for the automotive industry, for total consideration of $526 million . The results of operations of KUM are reported within the Signal and Power Solutions segment from the date of acquisition. The Company acquired KUM utilizing cash on hand. The acquisition was accounted for as a business combination, with the total purchase price allocated on a preliminary basis using information available, in the second quarter of 2018. Minor adjustments were recorded to the purchase price, goodwill and other assets purchased and liabilities assumed, from the amounts disclosed as of June 30, 2018. These adjustments were not significant for any period presented after the acquisition date. The preliminary purchase price and related allocation to the acquired net assets of KUM based on their estimated fair values is shown below (in millions): Assets acquired and liabilities assumed Purchase price, cash consideration, net of cash acquired $ 515 Debt and pension liabilities assumed 11 Total consideration, net of cash acquired $ 526 Property, plant and equipment $ 121 Intangible assets 110 Other assets, net 31 Identifiable net assets acquired 262 Goodwill resulting from purchase 264 Total purchase price allocation $ 526 Intangible assets primarily include amounts recognized for the fair value of customer-based assets, which will be amortized over their estimated useful lives of approximately 9 years. The estimated fair value of these assets was based on third-party valuations and management’s estimates, generally utilizing income and market approaches. Goodwill recognized in this transaction is primarily attributable to synergies expected to arise after the acquisition and the assembled workforce of KUM, and is not deductible for tax purposes. The purchase price and related allocation are preliminary and could be revised as a result of adjustments made to the purchase price, additional information obtained regarding liabilities assumed, including, but not limited to, contingent liabilities, revisions of provisional estimates of fair values, including, but not limited to, the completion of independent appraisals and valuations related to property, plant and equipment and intangible assets, and certain tax attributes. The pro forma effects of this acquisition would not materially impact the Company’s reported results for any period presented, and as a result no pro forma financial statements were presented. Technology Investments The Company has made technology investments in certain non-consolidated affiliates for ownership interests of less than 20%, which are accounted for in accordance with ASU 2016-01, as described in Note 2. Significant Accounting Policies. These investments do not have readily determinable fair values and are measured at cost, less impairments, adjusted for observable price changes in orderly transactions for identical or similar investments of the same issuer. During the first quarter of 2019, the Company’s Advanced Safety and User Experience segment made an additional $3 million investment in Otonomo Technologies Ltd. (“Otonomo”), a connected car data marketplace developer. This investment was in addition to the Company’s $15 million investment made in the first quarter of 2017. During the fourth quarter of 2018, the Company’s Advanced Safety and User Experience segment made a $15 million investment in Affectiva, Inc., a leader in human perception artificial intelligence technology. As of March 31, 2019 , the Company had the following technology investments, which are classified within other long-term assets in the consolidated balance sheet: Investment Name Segment Investment Date Investment (in millions) Affectiva, Inc. Advanced Safety and User Experience Q4 2018 $ 15 Innoviz Technologies Advanced Safety and User Experience Q3 2017 15 LeddarTech, Inc. Advanced Safety and User Experience Q3 2017 10 Valens Semiconductor Ltd. Signal and Power Solutions Q2 2017 10 Otonomo Technologies Ltd. Advanced Safety and User Experience Q1 2017; Q1 2019 37 Quanergy Systems, Inc Advanced Safety and User Experience Q2 2015; Q1 2016 6 Other investments Advanced Safety and User Experience Q4 2018 1 $ 94 During the three months ended March 31, 2019 , the Company’s investment in Otonomo was remeasured to a fair value of $37 million , based on a subsequent round of financing observed to be for identical or similar investments of the same issuer. As a result, the Company recorded a pre-tax unrealized gain of $19 million to other income, net during the three months ended March 31, 2019 .

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	SHARE-BASED COMPENSATION Long-Term Incentive Plan The Aptiv PLC Long-Term Incentive Plan, as amended and restated effective April 23, 2015 (the “PLC LTIP”), allows for the grant of awards of up to 25,665,448 ordinary shares for long-term compensation. The PLC LTIP is designed to align the interests of management and shareholders. The awards can be in the form of shares, options, stock appreciation rights, restricted stock, restricted stock units (“RSUs”), performance awards and other share-based awards to the employees, directors, consultants and advisors of the Company. The Company has awarded annual long-term grants of RSUs under the PLC LTIP in each year from 2012 to 2019 in order to align management compensation with Aptiv’s overall business strategy. The Company has competitive and market-appropriate ownership requirements. All of the RSUs granted under the PLC LTIP are eligible to receive dividend equivalents for any dividend paid from the grant date through the vesting date. Dividend equivalents are generally paid out in ordinary shares upon vesting of the underlying RSUs. Historical amounts disclosed within this note include amounts attributable to the Company’s discontinued operations, unless otherwise noted, and for activity prior to December 4, 2017 represent awards based on shares of Delphi Automotive PLC. Board of Director Awards On April 27, 2017, Aptiv granted 26,782 RSUs to the Board of Directors at a grant date fair value of approximately $2 million . The grant date fair value was determined based on the closing price of the Company’s ordinary shares on April 27, 2017. The RSUs vested on April 25, 2018, and 24,642 ordinary shares, which included shares issued in connection with dividend equivalents, were issued to members of the Board of Directors at a fair value of approximately $2 million . 2,649 ordinary shares were withheld to cover withholding taxes. On April 26, 2018, Aptiv granted 22,676 RSUs to the Board of Directors at a grant date fair value of approximately $2 million . The grant date fair value was determined based on the closing price of the Company’s ordinary shares on April 26, 2018. The RSUs vested on April 24, 2019, and 23,999 ordinary shares, which included shares issued in connection with dividend equivalents, were issued to members of the Board of Directors at a fair value of approximately $2 million . 3,228 ordinary shares were withheld to cover withholding taxes. On April 25, 2019, Aptiv granted 20,765 RSUs to the Board of Directors at a grant date fair value of approximately $2 million . The grant date fair value was determined based on the closing price of the Company’s ordinary shares on April 25, 2019. The RSUs will vest on April 22, 2020, the day before the 2020 annual meeting of shareholders. Executive Awards Aptiv has made annual grants of RSUs to its executives in February of each year beginning in 2012. These awards include a time-based vesting portion and a performance-based vesting portion, as well as continuity awards in certain years. The time-based RSUs, which make up 25% of the awards for Aptiv’s officers and 50% for Aptiv’s other executives, vest ratably over three years beginning on the first anniversary of the grant date. The performance-based RSUs, which make up 75% of the awards for Aptiv’s officers and 50% for Aptiv’s other executives, vest at the completion of a three-year performance period if certain targets are met. Each executive will receive between 0% and 200% of his or her target performance-based award based on the Company’s performance against established company-wide performance metrics, which are: Metric 2016 - 2019 Grants 2015 Grant Average return on net assets (1) 50% 50% Cumulative net income 25% N/A Cumulative earnings per share (2) N/A 30% Relative total shareholder return (3) 25% 20% (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. The details of the executive grants were as follows: Grant Date RSUs Granted Grant Date Fair Value Time-Based Award Vesting Dates Performance-Based Award Vesting Date (in millions) February 2015 0.90 $ 76 Annually on anniversary of grant date, 2016 - 2018 December 31, 2017 February 2016 0.71 48 Annually on anniversary of grant date, 2017 - 2019 December 31, 2018 February 2017 0.80 63 Annually on anniversary of grant date, 2018 - 2020 December 31, 2019 February 2018 0.63 61 Annually on anniversary of grant date, 2019 - 2021 December 31, 2020 February 2019 0.71 62 Annually on anniversary of grant date, 2020 - 2022 December 31, 2021 The grant date fair value of the RSUs is determined based on the target number of awards issued, the closing price of the Company’s ordinary shares on the date of the grant of the award, including an estimate for forfeitures, and a contemporaneous valuation performed by an independent valuation specialist with respect to the relative total shareholder return awards. Any new executives hired after the annual executive RSU grant date may be eligible to participate in the PLC LTIP. The Company has also granted additional awards to employees in certain periods under the PLC LTIP. Any off cycle grants made for new hires or to other employees are valued at their grant date fair value based on the closing price of the Company’s ordinary shares on the date of such grant. In February 2018, under the time-based vesting terms of the outstanding awards, 285,344 ordinary shares were issued to Aptiv employees at a fair value of approximately $26 million , of which 102,045 ordinary shares were withheld to cover withholding taxes. The performance-based RSUs associated with the 2015 grant vested at the completion of a three-year performance period on December 31, 2017, and in the first quarter of 2018, 640,239 ordinary shares were issued to employees at a fair value of approximately $59 million , of which 240,483 ordinary shares were withheld to cover withholding taxes. In February 2019, under the time-based vesting terms of the outstanding awards, 529,812 ordinary shares were issued to Aptiv employees at a fair value of approximately $44 million , of which 203,839 ordinary shares were withheld to cover withholding taxes. The performance-based RSUs associated with the 2016 grant, and applicable continuity awards, vested at the completion of a three-year performance period on December 31, 2018, and in the first quarter of 2019, 493,674 ordinary shares were issued to employees at a fair value of approximately $41 million , of which 199,547 ordinary shares were withheld to cover withholding taxes. A summary of RSU activity, including award grants, vesting and forfeitures is provided below: RSUs Weighted Average Grant Date Fair Value (in thousands) Nonvested, January 1, 2019 1,879 $ 81.24 Granted 855 86.75 Vested (530 ) 70.05 Forfeited (28 ) 83.83 Nonvested, March 31, 2019 2,176 86.10 Aptiv recognized compensation expense of $15 million ( $15 million , net of tax) and $13 million ( $12 million , net of tax) based on the Company’s best estimate of ultimate performance against the respective targets during the three months ended March 31, 2019 and 2018 , respectively. Aptiv will continue to recognize compensation expense, based on the grant date fair value of the awards applied to the Company’s best estimate of ultimate performance against the respective targets, over the requisite vesting periods of the awards. Based on the grant date fair value of the awards and the Company’s best estimate of ultimate performance against the respective targets as of March 31, 2019 , unrecognized compensation expense on a pre-tax basis of approximately $138 million is anticipated to be recognized over a weighted average period of approximately 2 years. For the three months ended March 31, 2019 and 2018 , respectively, approximately $34 million and $32 million

Supplemental Guarantor And Non-

Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements	3 Months Ended
	Mar. 31, 2019
Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements [Abstract]
Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements	SUPPLEMENTAL GUARANTOR AND NON-GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS Basis of Presentation Notes Issued by the Subsidiary Issuer As described in Note 8. Debt, Aptiv Corporation (the “Subsidiary Issuer/Guarantor”), a 100% owned subsidiary of Aptiv PLC (the “Parent”), issued the 2014 Senior Notes, which were registered under the Securities Act, and is the borrower of obligations under the Credit Agreement. The 2014 Senior Notes and obligations under the Credit Agreement are fully and unconditionally guaranteed by Aptiv PLC and certain of Aptiv PLC’s direct and indirect subsidiary companies, which are directly or indirectly 100% owned by Aptiv PLC (the “Subsidiary Guarantors”), on a joint and several basis, subject to customary release provisions (other than in the case of Aptiv PLC). All other consolidated direct and indirect subsidiaries of Aptiv PLC are not subject to the guarantees (“Non-Guarantor Subsidiaries”). Notes Issued by the Parent As described in Note 8. Debt, Aptiv PLC issued the 2015 Euro-denominated Senior Notes, the 4.25% Senior Notes, the 2016 Euro-denominated Senior Notes, the 2016 Senior Notes and the 2019 Senior Notes, each of which were registered under the Securities Act. Each series of these senior notes are fully and unconditionally guaranteed on a joint and several basis, subject to customary release provisions, by certain of Aptiv PLC’s direct and indirect subsidiary companies (the “Subsidiary Guarantors”), and Aptiv Corporation, each of which are directly or indirectly 100% owned by Aptiv PLC. All other consolidated direct and indirect subsidiaries of Aptiv PLC are not subject to the guarantees (“Non-Guarantor Subsidiaries”). In lieu of providing separate audited financial statements for the Guarantors, the Company has included the accompanying condensed consolidating financial statements. These condensed consolidating financial statements are presented using the equity method. Under this method, the investments in subsidiaries are recorded at cost and adjusted for the Parent’s share of the subsidiary’s cumulative results of operations, capital contributions and distributions and other equity changes. The Non-Guarantor Subsidiaries are combined in the condensed consolidating financial statements. The principal elimination entries are to eliminate the investments in subsidiaries and intercompany balances and transactions. Three Months Ended March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net sales $ — $ — $ — $ 3,575 $ — $ 3,575 Operating expenses: Cost of sales — — — 2,962 — 2,962 Selling, general and administrative (39 ) — — 295 — 256 Amortization — — — 34 — 34 Restructuring — — — 26 — 26 Total operating expenses (39 ) — — 3,317 — 3,278 Operating income 39 — — 258 — 297 Interest (expense) income (30 ) (48 ) (60 ) (17 ) 117 (38 ) Other (expense) income, net (6 ) — 36 103 (117 ) 16 Income (loss) before income taxes and equity income 3 (48 ) (24 ) 344 — 275 Income tax benefit (expense) — — 5 (38 ) — (33 ) Income (loss) before equity income 3 (48 ) (19 ) 306 — 242 Equity in net income of affiliates — — — 3 — 3 Equity in net income (loss) of subsidiaries 237 218 25 — (480 ) — Net income (loss) 240 170 6 309 (480 ) 245 Net income attributable to noncontrolling interest — — — 5 — 5 Net income (loss) attributable to Aptiv $ 240 $ 170 $ 6 $ 304 $ (480 ) $ 240 Statement of Operations Three Months Ended March 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net sales $ — $ — $ — $ 3,630 $ — $ 3,630 Operating expenses: Cost of sales — — — 2,947 — 2,947 Selling, general and administrative (4 ) — — 263 — 259 Amortization — — — 30 — 30 Restructuring — — — 20 — 20 Total operating expenses (4 ) — — 3,260 — 3,256 Operating income 4 — — 370 — 374 Interest (expense) income (61 ) (7 ) (43 ) (1 ) 78 (34 ) Other income (expense), net — — — 108 (78 ) 30 (Loss) income before income taxes and equity income (57 ) (7 ) (43 ) 477 — 370 Income tax benefit (expense) — — 10 (69 ) — (59 ) (Loss) income before equity income (57 ) (7 ) (33 ) 408 — 311 Equity in net income of affiliates — — — 5 — 5 Equity in net income (loss) of subsidiaries 364 263 (29 ) — (598 ) — Net income (loss) 307 256 (62 ) 413 (598 ) 316 Net income attributable to noncontrolling interest — — — 9 — 9 Net income (loss) attributable to Aptiv $ 307 $ 256 $ (62 ) $ 404 $ (598 ) $ 307 Three Months Ended March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net income (loss) $ 240 $ 170 $ 6 $ 309 $ (480 ) $ 245 Other comprehensive income (loss): Currency translation adjustments 23 — — (22 ) — 1 Net change in unrecognized gain on derivative instruments, net of tax — — — 19 — 19 Employee benefit plans adjustment, net of tax — — — 2 — 2 Other comprehensive income (loss) 23 — — (1 ) — 22 Equity in other comprehensive (loss) income of subsidiaries (2 ) 19 (10 ) — (7 ) — Comprehensive income (loss) 261 189 (4 ) 308 (487 ) 267 Comprehensive income attributable to noncontrolling interests — — — 6 — 6 Comprehensive income (loss) attributable to Aptiv $ 261 $ 189 $ (4 ) $ 302 $ (487 ) $ 261 Statement of Comprehensive Income Three Months Ended March 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net income (loss) $ 307 $ 256 $ (62 ) $ 413 $ (598 ) $ 316 Other comprehensive (loss) income: Currency translation adjustments (37 ) — — 98 — 61 Net change in unrecognized loss on derivative instruments, net of tax — — — (23 ) — (23 ) Employee benefit plans adjustment, net of tax — — — 1 — 1 Other comprehensive (loss) income (37 ) — — 76 — 39 Equity in other comprehensive income (loss) of subsidiaries 72 17 21 — (110 ) — Comprehensive income (loss) 342 273 (41 ) 489 (708 ) 355 Comprehensive income attributable to noncontrolling interests — — — 13 — 13 Comprehensive income (loss) attributable to Aptiv $ 342 $ 273 $ (41 ) $ 476 $ (708 ) $ 342 March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) ASSETS Current assets: Cash and cash equivalents $ — $ — $ — $ 321 $ — $ 321 Restricted cash — — — 1 — 1 Accounts receivable, net — — — 2,736 — 2,736 Intercompany receivables, current 51 16 3,256 4,820 (8,143 ) — Inventories — — — 1,326 — 1,326 Other current assets — — — 435 — 435 Total current assets 51 16 3,256 9,639 (8,143 ) 4,819 Long-term assets: Intercompany receivables, long-term — — 768 1,458 (2,226 ) — Property, net — — — 3,218 — 3,218 Operating lease right-of-use assets — — — 434 — 434 Investments in affiliates — — — 102 — 102 Investments in subsidiaries 7,632 8,143 1,779 — (17,554 ) — Intangible assets, net — — — 3,837 — 3,837 Other long-term assets — — 5 604 — 609 Total long-term assets 7,632 8,143 2,552 9,653 (19,780 ) 8,200 Total assets $ 7,683 $ 8,159 $ 5,808 $ 19,292 $ (27,923 ) $ 13,019 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt $ — $ — $ 205 $ 337 $ — $ 542 Accounts payable — — — 2,340 — 2,340 Intercompany payables, current 1,103 4,527 2,513 — (8,143 ) — Accrued liabilities 20 — 4 1,108 — 1,132 Total current liabilities 1,123 4,527 2,722 3,785 (8,143 ) 4,014 Long-term liabilities: Long-term debt 2,925 — 1,045 25 — 3,995 Intercompany payables, long-term — — 1,315 911 (2,226 ) — Pension benefit obligations — — — 440 — 440 Long-term operating lease liabilities — — — 350 — 350 Other long-term liabilities — — — 585 — 585 Total long-term liabilities 2,925 — 2,360 2,311 (2,226 ) 5,370 Total liabilities 4,048 4,527 5,082 6,096 (10,369 ) 9,384 Total Aptiv shareholders’ equity 3,635 3,632 726 12,979 (17,554 ) 3,418 Noncontrolling interest — — — 217 — 217 Total shareholders’ equity 3,635 3,632 726 13,196 (17,554 ) 3,635 Total liabilities and shareholders’ equity $ 7,683 $ 8,159 $ 5,808 $ 19,292 $ (27,923 ) $ 13,019 Balance Sheet as of December 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) ASSETS Current assets: Cash and cash equivalents $ 1 $ — $ — $ 566 $ — $ 567 Restricted cash — — — 1 — 1 Accounts receivable, net — — — 2,487 — 2,487 Intercompany receivables, current 54 16 3,114 4,201 (7,385 ) — Inventories — — — 1,277 — 1,277 Other current assets — — — 445 — 445 Total current assets 55 16 3,114 8,977 (7,385 ) 4,777 Long-term assets: Intercompany receivables, long-term — — 768 1,424 (2,192 ) — Property, net — — — 3,179 — 3,179 Investments in affiliates — — — 99 — 99 Investments in subsidiaries 7,392 7,860 1,568 — (16,820 ) — Intangible assets, net — — — 3,904 — 3,904 Other long-term assets — — 6 515 — 521 Total long-term assets 7,392 7,860 2,342 9,121 (19,012 ) 7,703 Total assets $ 7,447 $ 7,876 $ 5,456 $ 18,098 $ (26,397 ) $ 12,480 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt $ — $ — $ 25 $ 281 $ — $ 306 Accounts payable 2 — — 2,332 — 2,334 Intercompany payables, current 791 4,479 2,115 — (7,385 ) — Accrued liabilities 31 — 11 1,012 — 1,054 Total current liabilities 824 4,479 2,151 3,625 (7,385 ) 3,694 Long-term liabilities: Long-term debt 2,953 — 1,055 30 — 4,038 Intercompany payables, long-term — — 1,296 896 (2,192 ) — Pension benefit obligations — — — 445 — 445 Other long-term liabilities — — — 633 — 633 Total long-term liabilities 2,953 — 2,351 2,004 (2,192 ) 5,116 Total liabilities 3,777 4,479 4,502 5,629 (9,577 ) 8,810 Total Aptiv shareholders’ equity 3,670 3,397 954 12,258 (16,820 ) 3,459 Noncontrolling interest — — — 211 — 211 Total shareholders’ equity 3,670 3,397 954 12,469 (16,820 ) 3,670 Total liabilities and shareholders’ equity $ 7,447 $ 7,876 $ 5,456 $ 18,098 $ (26,397 ) $ 12,480 Three Months Ended March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net cash (used in) provided by operating activities from continuing operations $ (10 ) $ — $ — $ 94 $ — $ 84 Net cash used in operating activities from discontinued operations — — — — — — Net cash (used in) provided by operating activities (10 ) — — 94 — 84 Cash flows from investing activities: Capital expenditures — — — (235 ) — (235 ) Proceeds from sale of property / investments — — — 3 — 3 Cost of business acquisitions, net of cash acquired — — — 2 — 2 Cost of technology investments — — — (3 ) — (3 ) Settlement of derivatives — — — (2 ) — (2 ) Loans to affiliates — — — (303 ) 303 — Repayments of loans from affiliates — — — 175 (175 ) — Net cash (used in) provided by investing activities — — — (363 ) 128 (235 ) Cash flows from financing activities: Net proceeds under other short-term debt agreements — — 175 54 — 229 Repayment of senior notes (654 ) — — — — (654 ) Proceeds from issuance of senior notes, net of issuance costs 643 — — — — 643 Proceeds from borrowings from affiliates 303 — — — (303 ) — Payments on borrowings from affiliates — — (175 ) — 175 — Repurchase of ordinary shares (226 ) — — — — (226 ) Distribution of cash dividends (57 ) — — — — (57 ) Taxes withheld and paid on employees' restricted share awards — — — (34 ) — (34 ) Net cash provided by (used in) financing activities 9 — — 20 (128 ) (99 ) Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash — — — 4 — 4 Decrease in cash, cash equivalents and restricted cash (1 ) — — (245 ) — (246 ) Cash, cash equivalents and restricted cash at beginning of period 1 — — 567 — 568 Cash, cash equivalents and restricted cash at end of period $ — $ — $ — $ 322 $ — $ 322 Statement of Cash Flows for the Three Months Ended March 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net cash (used in) provided by operating activities from continuing operations $ (36 ) $ — $ — $ 222 $ — $ 186 Net cash used in operating activities from discontinued operations — — — (31 ) — (31 ) Net cash (used in) provided by operating activities (36 ) — — 191 — 155 Cash flows from investing activities: Capital expenditures — — — (243 ) — (243 ) Proceeds from sale of property / investments — — — 3 — 3 Deposit for acquisition of KUM (5 ) — — — — (5 ) Loans to affiliates — — — (250 ) 250 — Net cash (used in) provided by investing activities (5 ) — — (490 ) 250 (245 ) Cash flows from financing activities: Net proceeds under other short-term debt agreements — — — 35 — 35 Proceeds from borrowings from affiliates 250 — — — (250 ) — Repurchase of ordinary shares (149 ) — — — — (149 ) Distribution of cash dividends (59 ) — — — — (59 ) Taxes withheld and paid on employees' restricted share awards — — — (32 ) — (32 ) Net cash provided by (used in) financing activities 42 — — 3 (250 ) (205 ) Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash — — — 44 — 44 Increase (decrease) in cash, cash equivalents and restricted cash 1 — — (252 ) — (251 ) Cash, cash equivalents and restricted cash at beginning of period 1 — — 1,596 — 1,597 Cash, cash equivalents and restricted cash at end of period $ 2 $ — $ — $ 1,344 $ — $ 1,346

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment Reporting	SEGMENT REPORTING Aptiv operates its core business along the following operating segments, which are grouped on the basis of similar product, market and operating factors: • Signal and Power Solutions, which includes complete electrical architecture and component products. • Advanced Safety and User Experience, which includes component and systems integration expertise in infotainment and connectivity, body controls and security systems, active and passive safety electronics, autonomous driving software and technologies, as well as advanced development of software. • Eliminations and Other, which includes i) the elimination of inter-segment transactions, and ii) certain other expenses and income of a non-operating or strategic nature. The accounting policies of the segments are the same as those described in Note 2. Significant Accounting Policies, except that the disaggregated financial results for the segments have been prepared using a management approach, which is consistent with the basis and manner in which management internally disaggregates financial information for which Aptiv’s chief operating decision maker regularly reviews financial results to assess performance of, and make internal operating decisions about allocating resources to, the segments. Generally, Aptiv evaluates segment performance based on stand-alone segment net income before interest expense, other income (expense), net, income tax expense, equity income (loss), net of tax, restructuring, other acquisition and portfolio project costs (which includes costs incurred to integrate acquired businesses and to plan and execute product portfolio transformation actions, including business and product acquisitions and divestitures), asset impairments, gains (losses) on business divestitures and deferred compensation related to acquisitions (“Adjusted Operating Income”) and accounts for inter-segment sales and transfers as if the sales or transfers were to third parties, at current market prices. Aptiv’s management utilizes Adjusted Operating Income as the key performance measure of segment income or loss to evaluate segment performance, and for planning and forecasting purposes to allocate resources to the segments, as management believes this measure is most reflective of the operational profitability or loss of Aptiv’s operating segments. Segment Adjusted Operating Income should not be considered a substitute for results prepared in accordance with U.S. GAAP and should not be considered an alternative to net income attributable to Aptiv, which is the most directly comparable financial measure to Adjusted Operating Income that is prepared in accordance with U.S. GAAP. Segment Adjusted Operating Income, as determined and measured by Aptiv, should also not be compared to similarly titled measures reported by other companies. Included below are sales and operating data for Aptiv’s segments for the three months ended March 31, 2019 and 2018 . Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other (1) Total (in millions) For the Three Months Ended March 31, 2019: Net sales $ 2,562 $ 1,023 $ (10 ) $ 3,575 Depreciation and amortization $ 131 $ 42 $ — $ 173 Adjusted operating income $ 283 $ 62 $ — $ 345 Operating income $ 257 $ 40 $ — $ 297 Equity income, net of tax $ 3 $ — $ — $ 3 Net income attributable to noncontrolling interest $ 5 $ — $ — $ 5 Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other (1) Total (in millions) For the Three Months Ended March 31, 2018: Net sales $ 2,617 $ 1,032 $ (19 ) $ 3,630 Depreciation and amortization $ 119 $ 36 $ — $ 155 Adjusted operating income $ 351 $ 76 $ — $ 427 Operating income $ 322 $ 52 $ — $ 374 Equity income, net of tax $ 5 $ — $ — $ 5 Net income attributable to noncontrolling interest $ 9 $ — $ — $ 9 (1) Eliminations and Other includes the elimination of inter-segment transactions. The reconciliation of Adjusted Operating Income to operating income includes, as applicable, restructuring, other acquisition and portfolio project costs (which includes costs incurred to integrate acquired businesses and to plan and execute product portfolio transformation actions, including business and product acquisitions and divestitures), asset impairments, gains (losses) on business divestitures and deferred compensation related to acquisitions. The reconciliations of Adjusted Operating Income to net income attributable to Aptiv for the three months ended March 31, 2019 and 2018 are as follows: Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) For the Three Months Ended March 31, 2019: Adjusted operating income $ 283 $ 62 $ — $ 345 Restructuring (19 ) (7 ) — (26 ) Other acquisition and portfolio project costs (7 ) (4 ) — (11 ) Deferred compensation related to nuTonomy acquisition — (11 ) — (11 ) Operating income $ 257 $ 40 $ — 297 Interest expense (38 ) Other income, net 16 Income before income taxes and equity income 275 Income tax expense (33 ) Equity income, net of tax 3 Net income 245 Net income attributable to noncontrolling interest 5 Net income attributable to Aptiv $ 240 Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) For the Three Months Ended March 31, 2018: Adjusted operating income $ 351 $ 76 $ — $ 427 Restructuring (18 ) (2 ) — (20 ) Other acquisition and portfolio project costs (11 ) (8 ) — (19 ) Deferred compensation related to nuTonomy acquisition — (14 ) — (14 ) Operating income $ 322 $ 52 $ — 374 Interest expense (34 ) Other income, net 30 Income before income taxes and equity income 370 Income tax expense (59 ) Equity income, net of tax 5 Net income 316 Net income attributable to noncontrolling interest 9 Net income attributable to Aptiv $ 307

Revenue Revenue

Revenue Revenue	3 Months Ended
	Mar. 31, 2019
Revenue [Abstract]
Revenue	REVENUE Revenue is recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Accordingly, revenue is measured based on consideration specified in a contract with a customer. Customer contracts generally are represented by a combination of a current purchase order and a current production schedule issued by the customer. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. From time to time, Aptiv enters into pricing agreements with its customers that provide for price reductions, some of which are conditional upon achieving certain joint cost savings targets. In these instances, revenue is recognized based on the agreed-upon price at the time of shipment. Sales incentives and allowances are recognized as a reduction to revenue at the time of the related sale. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction that are collected by Aptiv from a customer are excluded from revenue. Shipping and handling fees billed to customers are included in net sales, while costs of shipping and handling are included in cost of sales. Nature of Goods and Services The principal activity from which the Company generates its revenue is the manufacturing of production parts for OEM customers. Aptiv recognizes revenue at a point in time, rather than over time, as the performance obligation is satisfied when customers obtain control of the product upon title transfer and not as the product is manufactured or developed. Aptiv recognizes revenue for production parts at a point in time as title transfers to the customer. Although production parts are highly customized with no alternative use, Aptiv does not have an enforceable right to payment as customers have the right to cancel a product program without a notification period. The amount of revenue recognized is based on the purchase order price and adjusted for revenue allocated to variable consideration (i.e. estimated rebates and price discounts), as applicable. Customers typically pay for production parts based on customary business practices with payment terms averaging 60 days. Disaggregation of Revenue Revenue generated from Aptiv’s operating segments is disaggregated by primary geographic market in the following tables for the three months ended March 31, 2019 and 2018 . Information concerning geographic market reflects the manufacturing location. For the Three Months Ended March 31, 2019: Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) Geographic Market North America $ 1,096 $ 326 $ (1 ) $ 1,421 Europe, Middle East and Africa 789 443 (3 ) 1,229 Asia Pacific 622 254 (6 ) 870 South America 55 — — 55 Total net sales $ 2,562 $ 1,023 $ (10 ) $ 3,575 For the Three Months Ended March 31, 2018: Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) Geographic Market North America $ 1,020 $ 335 $ (4 ) $ 1,351 Europe, Middle East and Africa 837 437 (5 ) 1,269 Asia Pacific 687 259 (10 ) 936 South America 73 1 — 74 Total net sales $ 2,617 $ 1,032 $ (19 ) $ 3,630 Contract Balances Consistent with the recognition of production parts revenue at a point in time as title transfers to the customer, Aptiv has no contract assets or contract liabilities balances as of March 31, 2019 or December 31, 2018 . Outstanding Performance Obligations As customer contracts generally are represented by a combination of a current purchase order and a current production schedule issued by the customer for a production part, there are no contracts outstanding beyond one year. Aptiv does not enter into fixed long-term supply agreements. As permitted, Aptiv does not disclose information about remaining performance obligations that have original expected durations of one year or less. Costs to Obtain a Contract From time to time, Aptiv makes payments to customers in conjunction with ongoing business. These payments to customers are generally recognized as a reduction to revenue at the time of the commitment to make these payments. However, certain other payments to customers, or upfront fees, meet the criteria to be considered a cost to obtain a contract as they are directly attributable to a contract, are incremental and management expects the fees to be recoverable. As of March 31, 2019 and December 31, 2018 , Aptiv has recorded $82 million (of which $15 million was classified within other current assets and $67 million was classified within other long-term assets) and $72 million (of which $8 million was classified within other current assets and $64 million was classified within other long-term assets), respectively, related to these capitalized upfront fees. Capitalized upfront fees are amortized to revenue based on the transfer of goods and services to the customer for which the upfront fees relate, which typically range from three to five years. There have been no impairment losses in relation to the costs capitalized. The amount of amortization to net sales was $3 million and $1 million for the three months ended March 31, 2019 and 2018

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Consolidation, Policy	Consolidation —The consolidated financial statements include the accounts of Aptiv and U.S. and non-U.S. subsidiaries in which Aptiv holds a controlling financial or management interest and variable interest entities of which Aptiv has determined that it is the primary beneficiary. Aptiv’s share of the earnings or losses of non-controlled affiliates, over which Aptiv exercises significant influence (generally a 20% to 50% ownership interest), is included in the consolidated operating results using the equity method of accounting. When Aptiv does not have the ability to exercise significant influence (generally when ownership interest is less than 20%), investments in non-consolidated affiliates are accounted for in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , and are measured at cost, less impairments, adjusted for observable price changes in orderly transactions for identical or similar investments of the same issuer. All significant intercompany transactions and balances between consolidated Aptiv businesses have been eliminated. The Company monitors its investments in affiliates for indicators of other-than-temporary declines in value on an ongoing basis. If the Company determines that such a decline has occurred, an impairment loss is recorded, which is measured as the difference between carrying value and estimated fair value. Estimated fair value is generally determined using an income approach based on discounted cash flows or negotiated transaction values. Investments in non-consolidated affiliates totaled $94 million and $72 million as of March 31, 2019 and December 31, 2018
Use of Estimates, Policy	Use of estimates —Preparation of consolidated financial statements in conformity with U.S. GAAP requires the use of estimates and assumptions that affect amounts reported therein. Generally, matters subject to estimation and judgment include amounts related to accounts receivable realization, inventory obsolescence, asset impairments, useful lives of intangible and fixed assets, deferred tax asset valuation allowances, income taxes, pension benefit plan assumptions, accruals related to litigation, warranty costs, environmental remediation costs, contingent consideration arrangements, worker’s compensation
Revenue Recognition, Policy	Revenue recognition —Aptiv recognizes revenue in accordance with ASU 2014-09, Revenue from Contracts with Customers Sales incentives and allowances are recognized as a reduction to revenue at the time of the related sale. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction that are collected by Aptiv from a customer are excluded from revenue. Shipping and handling fees billed to customers are included in net sales, while costs of shipping and handling are included in cost of sales. Nature of Goods and Services The principal activity from which the Company generates its revenue is the manufacturing of production parts for OEM customers. Aptiv recognizes revenue at a point in time, rather than over time, as the performance obligation is satisfied when customers obtain control of the product upon title transfer and not as the product is manufactured or developed.
Net Income Per Share, Policy	Net income per share—Basic net income per share is computed by dividing net income attributable to Aptiv by the weighted average number of ordinary shares outstanding during the period. Diluted net income per share reflects the weighted average dilutive impact of all potentially dilutive securities from the date of issuance and is computed using the treasury stock method by dividing net income attributable to Aptiv by the diluted weighted average number of ordinary shares outstanding during the period. Unless otherwise noted, share and per share amounts included in these notes are on a diluted basis. Refer to Note 12. Shareholders’ Equity and Net Income Per Share for additional information including the calculation of basic and diluted net income per share.Basic net income per share is computed by dividing net income attributable to Aptiv by the weighted average number of ordinary shares outstanding during the period. Diluted net income per share reflects the weighted average dilutive impact of all potentially dilutive securities from the date of issuance and is computed using the treasury stock method by dividing net income attributable to Aptiv by the diluted weighted average number of ordinary shares outstanding during the period. For all periods presented, the calculation of net income per share contemplates the dilutive impacts, if any, of the Company’s share-based compensation plans. Refer to Note 18. Share-Based Compensation for additional information.
Cash and Cash Equivalents, Policy	Cash and cash equivalents—Cash and cash equivalents are defined as short-term, highly liquid investments with original maturities of three months or less.
Transfers and Servicing of Financial Assets, Policy	Accounts receivable —Aptiv enters into agreements to sell certain of its accounts receivable, primarily in Europe. Sales of receivables are accounted for in accordance with FASB Accounting Standards Codification (“ASC”) Topic 860, Transfers and Servicing
Intangible Assets, Policy	Intangible assets —Intangible assets were $1,334 million and $1,380 million as of March 31, 2019 and December 31, 2018 , respectively. Aptiv amortizes definite-lived intangible assets over their estimated useful lives. Aptiv has definite-lived intangible assets related to patents and developed technology, customer relationships and trade names. Indefinite-lived in-process research and development intangible assets are not amortized, but are tested for impairment annually, or more frequently when indicators of potential impairment exist, until the completion or abandonment of the associated research and development efforts. Upon completion of the projects, the assets will be amortized over the expected economic life of the asset, which will be determined on that date. Should the project be determined to be abandoned, and if the asset developed has no alternative use, the full value of the asset will be charged to expense. The Company also has intangible assets related to acquired trade names that are classified as indefinite-lived when there are no foreseeable limits on the periods of time over which they are expected to contribute cash flows. These indefinite-lived trade name assets are tested for impairment annually, or more frequently when indicators of potential impairment exist. Costs to renew or extend the term of acquired intangible assets are recognized as expense as incurred. Amortization expense was $34 million and $30 million and for the three months ended March 31, 2019 and 2018
Goodwill, Policy	Goodwill —Goodwill is the excess of the purchase price over the estimated fair value of identifiable net assets acquired in business combinations. The Company tests goodwill for impairment annually in the fourth quarter, or more frequently when indications of potential impairment exist. The Company monitors the existence of potential impairment indicators throughout the fiscal year. The Company tests for goodwill impairment at the reporting unit level. Our reporting units are the components of operating segments which constitute businesses for which discrete financial information is available and is regularly reviewed by segment management. The impairment test involves first qualitatively assessing goodwill for impairment. If the qualitative assessment is not met the Company then performs a quantitative assessment by first comparing the estimated fair value of each reporting unit to its carrying value, including goodwill. Fair value reflects the price a market participant would be willing to pay in a potential sale of the reporting unit. If the estimated fair value exceeds carrying value, then we conclude that no goodwill impairment has occurred. If the carrying value of the reporting unit exceeds its estimated fair value, a second step is required to measure possible goodwill impairment loss. The second step includes hypothetically valuing the tangible and intangible assets and liabilities of the reporting unit as if the reporting unit had been acquired in a business combination. Then, the implied fair value of the reporting unit’s goodwill is compared to the carrying value of that goodwill. If the carrying value of the reporting unit’s goodwill exceeds the implied fair value of the goodwill, the Company recognizes an impairment loss in an amount equal to the excess, not to exceed the carrying value. There were no indicators of potential goodwill impairment during the three months ended March 31, 2019 . Goodwill was $2,503 million and $2,524 million as of March 31, 2019 and December 31, 2018
Warranty, Policy	Warranty and product recalls —Expected warranty costs for products sold are recognized at the time of sale of the product based on an estimate of the amount that eventually will be required to settle such obligations. These accruals are based March 31, 2019 . The Company estimates the reasonably possible amount to ultimately resolve all matters in excess of the recorded reserves as of March 31, 2019 to be zero to $15 million
Discontinued Operations, Policy	Discontinued operations —The Company reports financial results for discontinued operations separately from continuing operations to distinguish the financial impact of disposal transactions from ongoing operations. Discontinued operations reporting occurs only when the disposal of a component or a group of components of the Company represents a strategic shift that will have a major effect on the Company’s operations and financial results. During the year ended December 31, 2017, the Company completed the Separation of its former Powertrain Systems segment by means of a spin-off into Delphi Technologies PLC. As a result of the spin-off, Aptiv recorded certain short-term assets and liabilities within the consolidated balance sheets as of March 31, 2018 and December 31, 2017 related to various agreements entered into in connection with the spin-off. The changes in these short-term assets and liabilities are reflected within operating activities from discontinued operations in the consolidated statement of cash flows for the three months ended March 31, 2018
Income Tax, Policy	Income taxes—Deferred tax assets and liabilities reflect temporary differences between the amount of assets and liabilities for financial and tax reporting purposes. Such amounts are adjusted, as appropriate, to reflect changes in tax rates expected to be in effect when the temporary differences reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in earnings in the period that includes the enactment date. A valuation allowance is recorded to reduce deferred tax assets to the amount that is more likely than not to be realized. In the event the Company determines it is more likely than not that the deferred tax assets will not be realized in the future, the valuation allowance adjustment to the deferred tax assets will be charged to earnings in the period in which the Company makes such a determination. In determining the provision for income taxes for financial statement purposes, the Company makes certain estimates and judgments which affect its evaluation of the carrying value of its deferred tax assets, as well as its calculation of certain tax liabilities. Refer to Note 11. Income Taxes for additional information.
Restructuring, Policy	Restructuring—Aptiv continually evaluates alternatives to align the business with the changing needs of its customers and to lower operating costs. This includes the realignment of its existing manufacturing capacity, facility closures, or similar actions, either in the normal course of business or pursuant to significant restructuring programs. These actions may result in employees receiving voluntary or involuntary employee termination benefits, which are mainly pursuant to union or other contractual agreements. Voluntary termination benefits are accrued when an employee accepts the related offer. Involuntary termination benefits are accrued upon the commitment to a termination plan and when the benefit arrangement is communicated to affected employees, or when liabilities are determined to be probable and estimable, depending on the existence of a substantive plan for severance or termination. Contract termination costs are recorded when contracts are terminated or when Aptiv ceases to use the leased facility and no longer derives economic benefit from the contract. All other exit costs are expensed as incurred. Refer to Note 7. Restructuring for additional information.
Customer Concentations, Policy	Customer concentrations —As reflected in the table below, net sales to General Motors Company (“GM”) and Volkswagen Group (“VW”), Aptiv’s two largest customers, totaled approximately 18% and 19% of our total net sales for the three months ended March 31, 2019 and 2018 , respectively. Percentage of Total Net Sales Accounts and Other Receivables Three Months Ended March 31, March 31, December 31, 2019 2018 (in millions) GM 10 % 11 % $ 252 $ 169 VW 8 % 8 % 134 149
Recently Issued Accounting Pronouncements, Policy	Recently adopted accounting pronouncements —Aptiv adopted ASU 2016-02, Leases , in the first quarter of 2019 using the optional transition method. This guidance requires lessees to recognize a lease liability and a right-of-use asset for all leases, with the exception of short-term leases with terms of twelve months or less. The lease liability represents the lessee’s obligation to make lease payments arising from a lease, and is measured as the present value of the lease payments. The right-of-use asset represents the lessee’s right to use a specified asset for the lease term, and is measured at the lease liability amount, adjusted for lease prepayment, lease incentives received and the lessee’s initial direct costs. Under the optional transition method, the Company’s reporting for the comparative periods in the consolidated financial statements will continue to be in accordance with ASC Topic 840, Leases (“ASC 840”). The adoption of this guidance resulted in the recording of operating lease right-of-use assets and operating lease liabilities to the consolidated balance sheet as of March 31, 2019 and did not have a significant impact on the Company’s results of operations or cash flows. As permitted by ASU 2016-02, Aptiv elected to apply the package of practical expedients allowing the Company to not reassess whether any expired or existing contracts are, or contain, leases, the lease classification for any expired or existing leases or initial direct costs for any expired or existing leases. Aptiv did not elect to apply the hindsight practical expedient allowing the Company to use hindsight when determining the lease term (i.e., evaluating the Company’s option to renew or terminate the lease or to purchase the underlying asset) and assessing impairment of expired or existing leases. Aptiv elected to apply the land easements practical expedient allowing the Company to not assess whether any expired or existing land easements are, or contain, leases if they were not previously accounted for as leases under ASC 840. Instead, Aptiv will continue to apply its existing accounting policies to historical land easements. Aptiv also elected to apply the short-term lease exception, therefore Aptiv will not record a right-of-use asset or corresponding lease liability for leases with a term of twelve months or less and instead will recognize a single lease cost allocated over the lease term, generally on a straight-line basis. Additionally, Aptiv elected the practical expedient to not separate lease components from non-lease components and instead accounts for both as a single lease component for all asset classes. Refer to Note 22. Leases for additional information. Aptiv adopted ASU 2017-12, Derivatives and Hedging—Targeted Improvements to Accounting for Hedging Activities , in the first quarter of 2019. This guidance expands and refines the application of hedge accounting for both non-financial and financial risk components and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The adoption of this guidance did not have a significant impact on Aptiv’s financial statements. Refer to Note 14. Derivatives and Hedging Activities for further information regarding derivatives. Aptiv adopted ASU 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income , in the first quarter of 2019. This guidance allows for the elimination of the stranded income tax effects resulting from the enactment of the Tax Cuts and Jobs Act (the “Tax Legislation”) through a reclassification from accumulated other comprehensive income (“OCI”) to retained earnings. Upon adoption, Aptiv recorded an increase to retained earnings of $9 million and a corresponding decrease to accumulated OCI during the three months ended March 31, 2019 . Recently issued accounting pronouncements not yet adopted —In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . This guidance requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. This guidance also requires enhanced disclosures regarding significant estimates and judgments used in estimating credit losses. The new guidance is effective for fiscal years beginning after December 15, 2019. Early adoption is permitted for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company is currently evaluating the impact that the adoption of this guidance will have on its consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment
Inventories, Policy	Inventories are stated at the lower of cost, determined on a first-in, first-out basis, or net realizable value, including direct material costs and direct and indirect manufacturing costs.
Pensions, Policy	Certain of Aptiv’s non-U.S. subsidiaries sponsor defined benefit pension plans, which generally provide benefits based on negotiated amounts for each year of service. Aptiv’s primary non-U.S. plans are located in France, Germany, Mexico, Portugal and the U.K. The U.K. and certain Mexican plans are funded. In addition, Aptiv has defined benefit plans in South Korea, Turkey and Italy for which amounts are payable to employees immediately upon separation. The obligations for these plans are recorded over the requisite service period. Aptiv sponsors a Supplemental Executive Retirement Program (“SERP”) for those employees who were U.S. executives of DPHH prior to September 30, 2008 and were still U.S. executives of the Company on October 7, 2009, the effective date of the program. This program is unfunded. Executives receive benefits over 5
Guarantor, Policy	In lieu of providing separate audited financial statements for the Guarantors, the Company has included the accompanying condensed consolidating financial statements. These condensed consolidating financial statements are presented using the equity method. Under this method, the investments in subsidiaries are recorded at cost and adjusted for the Parent’s share of the subsidiary’s cumulative results of operations, capital contributions and distributions and other equity changes. The Non-Guarantor Subsidiaries are combined in the condensed consolidating financial statements. The principal elimination entries are to eliminate the investments in subsidiaries and intercompany balances and transactions.
Segment Reporting, Policy	The accounting policies of the segments are the same as those described in Note 2. Significant Accounting Policies, except that the disaggregated financial results for the segments have been prepared using a management approach, which is consistent with the basis and manner in which management internally disaggregates financial information for which Aptiv’s chief operating decision maker regularly reviews financial results to assess performance of, and make internal operating decisions about allocating resources to, the segments.Generally, Aptiv evaluates segment performance based on stand-alone segment net income before interest expense, other income (expense), net, income tax expense, equity income (loss), net of tax, restructuring, other acquisition and portfolio project costs (which includes costs incurred to integrate acquired businesses and to plan and execute product portfolio transformation actions, including business and product acquisitions and divestitures), asset impairments, gains (losses) on business divestitures and deferred compensation related to acquisitions (“Adjusted Operating Income”) and accounts for inter-segment sales and transfers as if the sales or transfers were to third parties, at current market prices. Aptiv’s management utilizes Adjusted Operating Income as the key performance measure of segment income or loss to evaluate segment performance, and for planning and forecasting purposes to allocate resources to the segments, as management believes this measure is most reflective of the operational profitability or loss of Aptiv’s operating segments. Segment Adjusted Operating Income should not be considered a substitute for results prepared in accordance with U.S. GAAP and should not be considered an alternative to net income attributable to Aptiv, which is the most directly comparable financial measure to Adjusted Operating Income that is prepared in accordance with U.S. GAAP. Segment Adjusted Operating Income, as determined and measured by Aptiv, should also not be compared to similarly titled measures reported by other companies.

Leases (Policies)

Leases (Policies)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases, Policy	The Company has operating and finance leases for real estate, office equipment, automobiles, forklifts and certain other equipment. The Company's leases have remaining lease terms of 1 year to 30 years, some of which include options to extend the leases for up to 8 years, and some of which include options to terminate the leases within 1

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Schedule of Revenue by Major Customers by Reporting Segments	Customer concentrations —As reflected in the table below, net sales to General Motors Company (“GM”) and Volkswagen Group (“VW”), Aptiv’s two largest customers, totaled approximately 18% and 19% of our total net sales for the three months ended March 31, 2019 and 2018 , respectively. Percentage of Total Net Sales Accounts and Other Receivables Three Months Ended March 31, March 31, December 31, 2019 2018 (in millions) GM 10 % 11 % $ 252 $ 169 VW 8 % 8 % 134 149

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Mar. 31, 2019
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	A summary of inventories is shown below: March 31, December 31, (in millions) Productive material $ 761 $ 724 Work-in-process 107 101 Finished goods 458 452 Total $ 1,326 $ 1,277

Assets (Tables)

Assets (Tables)	3 Months Ended
	Mar. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Current Assets	Other current assets consisted of the following: March 31, December 31, (in millions) Value added tax receivable $ 195 $ 185 Prepaid insurance and other expenses 86 72 Reimbursable engineering costs 44 47 Notes receivable 35 43 Income and other taxes receivable 42 73 Deposits to vendors 7 4 Derivative financial instruments (Note 14) 5 6 Capitalized upfront fees (Note 21) 15 8 Other 6 7 Total $ 435 $ 445
Schedule of Other Assets, Noncurrent	Other long-term assets consisted of the following: March 31, December 31, (in millions) Deferred income taxes, net $ 152 $ 143 Unamortized Revolving Credit Facility debt issuance costs (Note 8) 5 6 Income and other taxes receivable 27 6 Reimbursable engineering costs 166 137 Value added tax receivable 39 38 Equity investments (Note 17) 94 72 Derivative financial instruments (Note 14) 4 2 Capitalized upfront fees (Note 21) 67 64 Other 55 53 Total $ 609 $ 521

Liabilities (Tables)

Liabilities (Tables)	3 Months Ended
	Mar. 31, 2019
Other Liabilities Disclosure [Abstract]
Accrued Liabilities	Accrued liabilities consisted of the following: March 31, December 31, (in millions) Payroll-related obligations $ 241 $ 235 Employee benefits, including current pension obligations 55 96 Income and other taxes payable 189 187 Warranty obligations (Note 6) 30 33 Restructuring (Note 7) 59 55 Customer deposits 61 36 Derivative financial instruments (Note 14) 8 19 Accrued interest 24 42 Deferred compensation related to nuTonomy acquisition 38 31 Operating lease liabilities (Note 22) 93 — Other 334 320 Total $ 1,132 $ 1,054
Liabilities, Noncurrent	Other long-term liabilities consisted of the following: March 31, December 31, (in millions) Environmental (Note 10) $ 4 $ 3 Extended disability benefits 5 5 Warranty obligations (Note 6) 17 17 Restructuring (Note 7) 39 49 Payroll-related obligations 10 10 Accrued income taxes 170 201 Deferred income taxes, net 242 233 Derivative financial instruments (Note 14) 3 9 Deferred compensation related to nuTonomy acquisition 22 18 Other 73 88 Total $ 585 $ 633

Warranty Obligations (Tables)

Warranty Obligations (Tables)	3 Months Ended
	Mar. 31, 2019
Product Warranties Disclosures [Abstract]
Schedule of Product Warranty Liability	The table below summarizes the activity in the product warranty liability for the three months ended March 31, 2019 : Warranty Obligations (in millions) Accrual balance at beginning of period $ 50 Provision for estimated warranties incurred during the period 8 Changes in estimate for pre-existing warranties — Settlements made during the period (in cash or in kind) (11 ) Foreign currency translation and other — Accrual balance at end of period $ 47

Restructuring (Tables)

Restructuring (Tables)	3 Months Ended
	Mar. 31, 2019
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs	The following table summarizes the restructuring charges recorded for the three months ended March 31, 2019 and 2018 by operating segment: Three Months Ended March 31, 2019 2018 (in millions) Signal and Power Solutions $ 19 $ 18 Advanced Safety and User Experience 7 2 Total $ 26 $ 20
Schedule of Restructuring Reserve by Type of Cost	The table below summarizes the activity in the restructuring liability for the three months ended March 31, 2019 : Employee Termination Benefits Liability Other Exit Costs Liability Total (in millions) Accrual balance at January 1, 2019 $ 104 $ — $ 104 Provision for estimated expenses incurred during the period 26 — 26 Payments made during the period (31 ) — (31 ) Foreign currency and other (1 ) — (1 ) Accrual balance at March 31, 2019 $ 98 $ — $ 98

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following is a summary of debt outstanding, net of unamortized issuance costs and discounts, as of March 31, 2019 and December 31, 2018 , respectively: March 31, December 31, (in millions) Accounts receivable factoring $ 335 $ 279 Revolving Credit Facility 175 — 3.15%, senior notes, due 2020 (net of $0 and $1 unamortized issuance costs and $0 and $1 discount, respectively) — 648 4.15%, senior notes, due 2024 (net of $3 and $3 unamortized issuance costs and $1 and $1 discount, respectively) 696 696 1.50%, Euro-denominated senior notes, due 2025 (net of $3 and $3 unamortized issuance costs and $2 and $3 discount, respectively) 782 795 4.25%, senior notes, due 2026 (net of $3 and $3 unamortized issuance costs, respectively) 647 647 1.60%, Euro-denominated senior notes, due 2028 (net of $3 and $3 unamortized issuance costs and $1 and $1 discount, respectively) 558 568 4.35%, senior notes, due 2029 (net of $2 and $0 unamortized issuance costs, respectively) 298 — 4.40%, senior notes, due 2046 (net of $3 and $3 unamortized issuance costs and $2 and $2 discount, respectively) 295 295 5.40%, senior notes, due 2049 (net of $3 and $0 unamortized issuance costs and $2 and $0 discount, respectively) 345 — Tranche A Term Loan, due 2021 (net of $1 and $1 unamortized issuance costs, respectively) 379 384 Finance leases and other 27 32 Total debt 4,537 4,344 Less: current portion (542 ) (306 ) Long-term debt $ 3,995 $ 4,038
Schedule of Interest Rates	The Applicable Rates under the Credit Agreement on the specified dates are set forth below: March 31, 2019 December 31, 2018 LIBOR plus ABR plus LIBOR plus ABR plus Revolving Credit Facility 1.10 % 0.10 % 1.10 % 0.10 % Tranche A Term Loan 1.25 % 0.25 % 1.25 % 0.25 %
Schedule of Line of Credit Facilities	As of March 31, 2019 , Aptiv selected the one-month LIBOR interest rate option on the Tranche A Term Loan, and the rate effective as of March 31, 2019 , as detailed in the table below, was based on the Company’s current credit rating and the Applicable Rate for the Credit Agreement: Borrowings as of March 31, 2019 Rates effective as of Applicable Rate (in millions) March 31, 2019 Revolving Credit Facility ABR plus 0.10% $ 25 5.60 % Revolving Credit Facility LIBOR plus 1.10% $ 150 3.60 % Tranche A Term Loan LIBOR plus 1.25% $ 380 3.75 %

Pension Benefits (Tables)

Pension Benefits (Tables)	3 Months Ended
	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Schedule of Net Benefit Costs	The amounts shown below reflect the defined benefit pension expense for the three months ended March 31, 2019 and 2018 : Non-U.S. Plans U.S. Plans Three Months Ended March 31, 2019 2018 2019 2018 (in millions) Service cost $ 5 $ 5 $ — $ — Interest cost 7 7 — — Expected return on plan assets (5 ) (6 ) — — Curtailment loss — 1 — — Amortization of actuarial losses 3 4 — — Net periodic benefit cost $ 10 $ 11 $ — $ —

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense (Benefit) and Effective Tax Rate	The Company’s income tax expense and effective tax rate for the three months ended March 31, 2019 and 2018 were as follows: Three Months Ended March 31, 2019 2018 (dollars in millions) Income tax expense $ 33 $ 59 Effective tax rate 12 % 16 %

Shareholders' Equity And Net _2

Shareholders' Equity And Net Income Per Share (Tables)	3 Months Ended
	Mar. 31, 2019
Shareholders' Equity and Net Income Per Share Note [Abstract]
Schedule of Weighted Average Number of Shares	The following table illustrates net income per share attributable to Aptiv and the weighted average shares outstanding used in calculating basic and diluted income per share: Three Months Ended March 31, 2019 2018 (in millions, except per share data) Numerator: Net income attributable to Aptiv $ 240 $ 307 Denominator: Weighted average ordinary shares outstanding, basic 259.08 265.69 Dilutive shares related to restricted stock units (“RSUs”) 0.47 0.75 Weighted average ordinary shares outstanding, including dilutive shares 259.55 266.44 Net income per share attributable to Aptiv: Basic $ 0.93 $ 1.16 Diluted $ 0.92 $ 1.15 Anti-dilutive securities share impact — —
Schedule of Share Repurchases	A summary of the ordinary shares repurchased during the three months ended March 31, 2019 and 2018 is as follows: Three Months Ended March 31, 2019 2018 Total number of shares repurchased 2,840,079 1,676,144 Average price paid per share $ 79.57 $ 89.17 Total (in millions) $ 226 $ 149
Schedule of Dividends Declared and Paid	The Company has declared and paid cash dividends per ordinary share during the periods presented as follows: Dividend Amount Per Share (in millions) 2019: First quarter $ 0.22 $ 57 Total $ 0.22 $ 57 2018: Fourth quarter $ 0.22 $ 58 Third quarter 0.22 58 Second quarter 0.22 58 First quarter 0.22 59 Total $ 0.88 $ 233

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income	The changes in accumulated other comprehensive income (loss) attributable to Aptiv (net of tax) for the three months ended March 31, 2019 and 2018 are shown below. Three Months Ended March 31, 2019 2018 (in millions) Foreign currency translation adjustments: Balance at beginning of period $ (555 ) $ (369 ) Aggregate adjustment for the period (1) — 57 Balance at end of period (555 ) (312 ) Gains (losses) on derivatives: Balance at beginning of period (35 ) 4 Other comprehensive income (loss) before reclassifications (net tax effect of $0 and $4) 16 (18 ) Reclassification to income (net tax effect of $0 and $1) 3 (5 ) Adoption of ASU 2018-02 (Note 2) (8 ) — Balance at end of period (24 ) (19 ) Pension and postretirement plans: Balance at beginning of period (104 ) (106 ) Other comprehensive income (loss) before reclassifications (net tax effect of $0 and $1) — (3 ) Reclassification to income (net tax effect of $1 and $0) 2 4 Adoption of ASU 2018-02 (Note 2) (1 ) — Balance at end of period (103 ) (105 ) Accumulated other comprehensive loss, end of period $ (682 ) $ (436 ) (1) Includes gains of $23 million and losses of $37 million for the three months ended March 31, 2019 and 2018
Reclassifications out of Accumulated Other Comprehensive Income	Reclassifications from accumulated other comprehensive income (loss) to income for the three months ended March 31, 2019 and 2018 were as follows: Reclassification Out of Accumulated Other Comprehensive Income (Loss) Details About Accumulated Other Comprehensive Income Components Three Months Ended March 31, Affected Line Item in the Statement of Operations 2019 2018 (in millions) Gains (losses) on derivatives: Commodity derivatives $ (2 ) $ 9 Cost of sales Foreign currency derivatives (1 ) (5 ) Cost of sales (3 ) 4 Income before income taxes — 1 Income tax expense (3 ) 5 Net income — — Net income attributable to noncontrolling interest $ (3 ) $ 5 Net income attributable to Aptiv Pension and postretirement plans: Actuarial losses $ (3 ) $ (4 ) Other income (expense), net (1) (3 ) (4 ) Income before income taxes 1 — Income tax expense (2 ) (4 ) Net income — — Net income attributable to noncontrolling interest $ (2 ) $ (4 ) Net income attributable to Aptiv Total reclassifications for the period $ (5 ) $ 1 (1)

Derivatives And Hedging Activ_2

Derivatives And Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	As of March 31, 2019 , the Company had the following outstanding notional amounts related to commodity and foreign currency forward and option contracts designated as cash flow hedges that were entered into to hedge forecasted exposures: Commodity Quantity Hedged Unit of Measure Notional Amount (in thousands) (in millions) Copper 76,959 pounds $ 225 Foreign Currency Quantity Hedged Unit of Measure Notional Amount (Approximate USD Equivalent) (in millions) Mexican Peso 14,183 MXN $ 730 Chinese Yuan Renminbi 3,284 RMB 490 Polish Zloty 505 PLN 130 Euro 62 EUR 70 New Turkish Lira 50 TRY 10
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The fair value of derivative financial instruments recorded in the consolidated balance sheets as of March 31, 2019 and December 31, 2018 are as follows: Asset Derivatives Liability Derivatives Net Amounts of Assets and (Liabilities) Presented in the Balance Sheet Balance Sheet Location March 31, Balance Sheet Location March 31, March 31, (in millions) Derivatives designated as cash flow hedges: Commodity derivatives Other current assets $ — Accrued liabilities $ 2 Foreign currency derivatives* Other current assets 9 Other current assets 4 $ 5 Foreign currency derivatives* Accrued liabilities 2 Accrued liabilities 8 (6 ) Commodity derivatives Other long-term assets 2 Other long-term liabilities — Foreign currency derivatives* Other long-term assets 3 Other long-term assets 1 2 Foreign currency derivatives* Other long-term liabilities 1 Other long-term liabilities 4 (3 ) Total derivatives designated as hedges $ 17 $ 19 Asset Derivatives Liability Derivatives Net Amounts of Assets and (Liabilities) Presented in the Balance Sheet Balance Sheet Location December 31, Balance Sheet Location December 31, December 31, (in millions) Derivatives designated as cash flow hedges: Commodity derivatives Other current assets $ — Accrued liabilities $ 15 Foreign currency derivatives* Other current assets 9 Other current assets 3 $ 6 Foreign currency derivatives* Accrued liabilities — Accrued liabilities 4 (4 ) Commodity derivatives Other long-term assets — Other long-term liabilities 7 Foreign currency derivatives* Other long-term assets 2 Other long-term assets — 2 Foreign currency derivatives* Other long-term liabilities — Other long-term liabilities 2 (2 ) Total derivatives designated as hedges $ 11 $ 31 *
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The pre-tax effect of derivative financial instruments in the consolidated statement of operations and consolidated statement of comprehensive income for the three months ended March 31, 2019 is as follows: Three Months Ended March 31, 2019 Gain (Loss) Recognized in OCI Loss Reclassified from OCI into Income (in millions) Derivatives designated as cash flow hedges: Commodity derivatives $ 20 $ (2 ) Foreign currency derivatives (2 ) (1 ) Derivatives designated as net investment hedges: Foreign currency derivatives (2 ) — Total $ 16 $ (3 ) Gain Recognized in Income (in millions) Derivatives not designated: Foreign currency derivatives $ — Total $ — The pre-tax effect of derivative financial instruments in the consolidated statement of operations and consolidated statement of comprehensive income for the three months ended March 31, 2018 is as follows: Three Months Ended March 31, 2018 (Loss) Gain Recognized in OCI Gain (Loss) Reclassified from OCI into Income (in millions) Derivatives designated as cash flow hedges: Commodity derivatives $ (17 ) $ 9 Foreign currency derivatives 16 (5 ) Derivatives designated as net investment hedges: Foreign currency derivatives (13 ) — Total $ (14 ) $ 4 Gain Recognized in Income (in millions) Derivatives not designated: Foreign currency derivatives $ 10 Total $ 10

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Changes in Fair Value of Liabilities Measured on Recurring Basis with Unobservable Inputs	The changes in the contingent consideration liability classified as a Level 3 measurement for the three months ended March 31, 2019 were as follows: Contingent Consideration Liability (in millions) Fair value at beginning of period $ 49 Additions — Payments — Interest accretion 1 Fair value at end of period $ 50
Fair Value, Assets Measured on Recurring Basis	As of March 31, 2019 and December 31, 2018 , Aptiv had the following assets measured at fair value on a recurring basis: Total Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs (in millions) As of March 31, 2019: Commodity derivatives $ 2 $ — $ 2 $ — Foreign currency derivatives 7 — 7 — Total $ 9 $ — $ 9 $ — As of December 31, 2018: Foreign currency derivatives $ 8 $ — $ 8 $ — Total $ 8 $ — $ 8 $ —
Fair Value, Liabilities Measured on Recurring Basis	As of March 31, 2019 and December 31, 2018 , Aptiv had the following liabilities measured at fair value on a recurring basis: Total Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs (in millions) As of March 31, 2019: Commodity derivatives $ 2 $ — $ 2 $ — Foreign currency derivatives 9 — 9 — Contingent consideration 50 — — 50 Total $ 61 $ — $ 11 $ 50 As of December 31, 2018: Commodity derivatives $ 22 $ — $ 22 $ — Foreign currency derivatives 6 — 6 — Contingent consideration 49 — — 49 Total $ 77 $ — $ 28 $ 49

Other Income, Net (Tables)

Other Income, Net (Tables)	3 Months Ended
	Mar. 31, 2019
Other Income and Expenses [Abstract]
Interest and Other Income	Other income (expense), net included: Three Months Ended March 31, 2019 2018 (in millions) Interest income $ 3 $ 5 Loss on extinguishment of debt (6 ) — Components of net periodic benefit cost other than service cost (Note 9) (5 ) (6 ) Benefits associated with acquisitions — 11 Change in fair value of equity investments (Note 17) 19 — Other, net 5 20 Other income, net $ 16 $ 30

Acquisitions And Divestitures (

Acquisitions And Divestitures (Tables)	3 Months Ended
	Mar. 31, 2019
Business Acquisition [Line Items]
Schedule of Technology Investments	As of March 31, 2019 , the Company had the following technology investments, which are classified within other long-term assets in the consolidated balance sheet: Investment Name Segment Investment Date Investment (in millions) Affectiva, Inc. Advanced Safety and User Experience Q4 2018 $ 15 Innoviz Technologies Advanced Safety and User Experience Q3 2017 15 LeddarTech, Inc. Advanced Safety and User Experience Q3 2017 10 Valens Semiconductor Ltd. Signal and Power Solutions Q2 2017 10 Otonomo Technologies Ltd. Advanced Safety and User Experience Q1 2017; Q1 2019 37 Quanergy Systems, Inc Advanced Safety and User Experience Q2 2015; Q1 2016 6 Other investments Advanced Safety and User Experience Q4 2018 1 $ 94
KUM
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The preliminary purchase price and related allocation to the acquired net assets of KUM based on their estimated fair values is shown below (in millions): Assets acquired and liabilities assumed Purchase price, cash consideration, net of cash acquired $ 515 Debt and pension liabilities assumed 11 Total consideration, net of cash acquired $ 526 Property, plant and equipment $ 121 Intangible assets 110 Other assets, net 31 Identifiable net assets acquired 262 Goodwill resulting from purchase 264 Total purchase price allocation $ 526
Winchester
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The preliminary purchase price and related allocation to the acquired net assets of Winchester based on their estimated fair values is shown below (in millions): Assets acquired and liabilities assumed Purchase price, cash consideration, net of cash acquired $ 680 Property, plant and equipment $ 31 Intangible assets 226 Other assets, net 25 Identifiable net assets acquired 282 Goodwill resulting from purchase 398 Total purchase price allocation $ 680

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation Restricted Stock Units Performance Awards Weighting	Each executive will receive between 0% and 200% of his or her target performance-based award based on the Company’s performance against established company-wide performance metrics, which are: Metric 2016 - 2019 Grants 2015 Grant Average return on net assets (1) 50% 50% Cumulative net income 25% N/A Cumulative earnings per share (2) N/A 30% Relative total shareholder return (3) 25% 20% (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)
Schedule of Executive RSU Grants	The details of the executive grants were as follows: Grant Date RSUs Granted Grant Date Fair Value Time-Based Award Vesting Dates Performance-Based Award Vesting Date (in millions) February 2015 0.90 $ 76 Annually on anniversary of grant date, 2016 - 2018 December 31, 2017 February 2016 0.71 48 Annually on anniversary of grant date, 2017 - 2019 December 31, 2018 February 2017 0.80 63 Annually on anniversary of grant date, 2018 - 2020 December 31, 2019 February 2018 0.63 61 Annually on anniversary of grant date, 2019 - 2021 December 31, 2020 February 2019 0.71 62 Annually on anniversary of grant date, 2020 - 2022 December 31, 2021
Schedule of Share-based Compensation Restricted Stock Units Award Activity	A summary of RSU activity, including award grants, vesting and forfeitures is provided below: RSUs Weighted Average Grant Date Fair Value (in thousands) Nonvested, January 1, 2019 1,879 $ 81.24 Granted 855 86.75 Vested (530 ) 70.05 Forfeited (28 ) 83.83 Nonvested, March 31, 2019 2,176 86.10

Supplemental Guarantor And No_2

Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements (Tables)	3 Months Ended
	Mar. 31, 2019
Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements [Abstract]
Schedule of Condensed Income Statement	Statement of Operations Three Months Ended March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net sales $ — $ — $ — $ 3,575 $ — $ 3,575 Operating expenses: Cost of sales — — — 2,962 — 2,962 Selling, general and administrative (39 ) — — 295 — 256 Amortization — — — 34 — 34 Restructuring — — — 26 — 26 Total operating expenses (39 ) — — 3,317 — 3,278 Operating income 39 — — 258 — 297 Interest (expense) income (30 ) (48 ) (60 ) (17 ) 117 (38 ) Other (expense) income, net (6 ) — 36 103 (117 ) 16 Income (loss) before income taxes and equity income 3 (48 ) (24 ) 344 — 275 Income tax benefit (expense) — — 5 (38 ) — (33 ) Income (loss) before equity income 3 (48 ) (19 ) 306 — 242 Equity in net income of affiliates — — — 3 — 3 Equity in net income (loss) of subsidiaries 237 218 25 — (480 ) — Net income (loss) 240 170 6 309 (480 ) 245 Net income attributable to noncontrolling interest — — — 5 — 5 Net income (loss) attributable to Aptiv $ 240 $ 170 $ 6 $ 304 $ (480 ) $ 240 Statement of Operations Three Months Ended March 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net sales $ — $ — $ — $ 3,630 $ — $ 3,630 Operating expenses: Cost of sales — — — 2,947 — 2,947 Selling, general and administrative (4 ) — — 263 — 259 Amortization — — — 30 — 30 Restructuring — — — 20 — 20 Total operating expenses (4 ) — — 3,260 — 3,256 Operating income 4 — — 370 — 374 Interest (expense) income (61 ) (7 ) (43 ) (1 ) 78 (34 ) Other income (expense), net — — — 108 (78 ) 30 (Loss) income before income taxes and equity income (57 ) (7 ) (43 ) 477 — 370 Income tax benefit (expense) — — 10 (69 ) — (59 ) (Loss) income before equity income (57 ) (7 ) (33 ) 408 — 311 Equity in net income of affiliates — — — 5 — 5 Equity in net income (loss) of subsidiaries 364 263 (29 ) — (598 ) — Net income (loss) 307 256 (62 ) 413 (598 ) 316 Net income attributable to noncontrolling interest — — — 9 — 9 Net income (loss) attributable to Aptiv $ 307 $ 256 $ (62 ) $ 404 $ (598 ) $ 307
Schedule of Comprehensive Income (Loss)	Statement of Comprehensive Income Three Months Ended March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net income (loss) $ 240 $ 170 $ 6 $ 309 $ (480 ) $ 245 Other comprehensive income (loss): Currency translation adjustments 23 — — (22 ) — 1 Net change in unrecognized gain on derivative instruments, net of tax — — — 19 — 19 Employee benefit plans adjustment, net of tax — — — 2 — 2 Other comprehensive income (loss) 23 — — (1 ) — 22 Equity in other comprehensive (loss) income of subsidiaries (2 ) 19 (10 ) — (7 ) — Comprehensive income (loss) 261 189 (4 ) 308 (487 ) 267 Comprehensive income attributable to noncontrolling interests — — — 6 — 6 Comprehensive income (loss) attributable to Aptiv $ 261 $ 189 $ (4 ) $ 302 $ (487 ) $ 261 Statement of Comprehensive Income Three Months Ended March 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net income (loss) $ 307 $ 256 $ (62 ) $ 413 $ (598 ) $ 316 Other comprehensive (loss) income: Currency translation adjustments (37 ) — — 98 — 61 Net change in unrecognized loss on derivative instruments, net of tax — — — (23 ) — (23 ) Employee benefit plans adjustment, net of tax — — — 1 — 1 Other comprehensive (loss) income (37 ) — — 76 — 39 Equity in other comprehensive income (loss) of subsidiaries 72 17 21 — (110 ) — Comprehensive income (loss) 342 273 (41 ) 489 (708 ) 355 Comprehensive income attributable to noncontrolling interests — — — 13 — 13 Comprehensive income (loss) attributable to Aptiv $ 342 $ 273 $ (41 ) $ 476 $ (708 ) $ 342
Schedule of Condensed Balance Sheet	Balance Sheet as of March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) ASSETS Current assets: Cash and cash equivalents $ — $ — $ — $ 321 $ — $ 321 Restricted cash — — — 1 — 1 Accounts receivable, net — — — 2,736 — 2,736 Intercompany receivables, current 51 16 3,256 4,820 (8,143 ) — Inventories — — — 1,326 — 1,326 Other current assets — — — 435 — 435 Total current assets 51 16 3,256 9,639 (8,143 ) 4,819 Long-term assets: Intercompany receivables, long-term — — 768 1,458 (2,226 ) — Property, net — — — 3,218 — 3,218 Operating lease right-of-use assets — — — 434 — 434 Investments in affiliates — — — 102 — 102 Investments in subsidiaries 7,632 8,143 1,779 — (17,554 ) — Intangible assets, net — — — 3,837 — 3,837 Other long-term assets — — 5 604 — 609 Total long-term assets 7,632 8,143 2,552 9,653 (19,780 ) 8,200 Total assets $ 7,683 $ 8,159 $ 5,808 $ 19,292 $ (27,923 ) $ 13,019 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt $ — $ — $ 205 $ 337 $ — $ 542 Accounts payable — — — 2,340 — 2,340 Intercompany payables, current 1,103 4,527 2,513 — (8,143 ) — Accrued liabilities 20 — 4 1,108 — 1,132 Total current liabilities 1,123 4,527 2,722 3,785 (8,143 ) 4,014 Long-term liabilities: Long-term debt 2,925 — 1,045 25 — 3,995 Intercompany payables, long-term — — 1,315 911 (2,226 ) — Pension benefit obligations — — — 440 — 440 Long-term operating lease liabilities — — — 350 — 350 Other long-term liabilities — — — 585 — 585 Total long-term liabilities 2,925 — 2,360 2,311 (2,226 ) 5,370 Total liabilities 4,048 4,527 5,082 6,096 (10,369 ) 9,384 Total Aptiv shareholders’ equity 3,635 3,632 726 12,979 (17,554 ) 3,418 Noncontrolling interest — — — 217 — 217 Total shareholders’ equity 3,635 3,632 726 13,196 (17,554 ) 3,635 Total liabilities and shareholders’ equity $ 7,683 $ 8,159 $ 5,808 $ 19,292 $ (27,923 ) $ 13,019 Balance Sheet as of December 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) ASSETS Current assets: Cash and cash equivalents $ 1 $ — $ — $ 566 $ — $ 567 Restricted cash — — — 1 — 1 Accounts receivable, net — — — 2,487 — 2,487 Intercompany receivables, current 54 16 3,114 4,201 (7,385 ) — Inventories — — — 1,277 — 1,277 Other current assets — — — 445 — 445 Total current assets 55 16 3,114 8,977 (7,385 ) 4,777 Long-term assets: Intercompany receivables, long-term — — 768 1,424 (2,192 ) — Property, net — — — 3,179 — 3,179 Investments in affiliates — — — 99 — 99 Investments in subsidiaries 7,392 7,860 1,568 — (16,820 ) — Intangible assets, net — — — 3,904 — 3,904 Other long-term assets — — 6 515 — 521 Total long-term assets 7,392 7,860 2,342 9,121 (19,012 ) 7,703 Total assets $ 7,447 $ 7,876 $ 5,456 $ 18,098 $ (26,397 ) $ 12,480 LIABILITIES AND SHAREHOLDERS’ EQUITY Current liabilities: Short-term debt $ — $ — $ 25 $ 281 $ — $ 306 Accounts payable 2 — — 2,332 — 2,334 Intercompany payables, current 791 4,479 2,115 — (7,385 ) — Accrued liabilities 31 — 11 1,012 — 1,054 Total current liabilities 824 4,479 2,151 3,625 (7,385 ) 3,694 Long-term liabilities: Long-term debt 2,953 — 1,055 30 — 4,038 Intercompany payables, long-term — — 1,296 896 (2,192 ) — Pension benefit obligations — — — 445 — 445 Other long-term liabilities — — — 633 — 633 Total long-term liabilities 2,953 — 2,351 2,004 (2,192 ) 5,116 Total liabilities 3,777 4,479 4,502 5,629 (9,577 ) 8,810 Total Aptiv shareholders’ equity 3,670 3,397 954 12,258 (16,820 ) 3,459 Noncontrolling interest — — — 211 — 211 Total shareholders’ equity 3,670 3,397 954 12,469 (16,820 ) 3,670 Total liabilities and shareholders’ equity $ 7,447 $ 7,876 $ 5,456 $ 18,098 $ (26,397 ) $ 12,480
Schedule of Condensed Cash Flow Statement	Statement of Cash Flows for the Three Months Ended March 31, 2019 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net cash (used in) provided by operating activities from continuing operations $ (10 ) $ — $ — $ 94 $ — $ 84 Net cash used in operating activities from discontinued operations — — — — — — Net cash (used in) provided by operating activities (10 ) — — 94 — 84 Cash flows from investing activities: Capital expenditures — — — (235 ) — (235 ) Proceeds from sale of property / investments — — — 3 — 3 Cost of business acquisitions, net of cash acquired — — — 2 — 2 Cost of technology investments — — — (3 ) — (3 ) Settlement of derivatives — — — (2 ) — (2 ) Loans to affiliates — — — (303 ) 303 — Repayments of loans from affiliates — — — 175 (175 ) — Net cash (used in) provided by investing activities — — — (363 ) 128 (235 ) Cash flows from financing activities: Net proceeds under other short-term debt agreements — — 175 54 — 229 Repayment of senior notes (654 ) — — — — (654 ) Proceeds from issuance of senior notes, net of issuance costs 643 — — — — 643 Proceeds from borrowings from affiliates 303 — — — (303 ) — Payments on borrowings from affiliates — — (175 ) — 175 — Repurchase of ordinary shares (226 ) — — — — (226 ) Distribution of cash dividends (57 ) — — — — (57 ) Taxes withheld and paid on employees' restricted share awards — — — (34 ) — (34 ) Net cash provided by (used in) financing activities 9 — — 20 (128 ) (99 ) Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash — — — 4 — 4 Decrease in cash, cash equivalents and restricted cash (1 ) — — (245 ) — (246 ) Cash, cash equivalents and restricted cash at beginning of period 1 — — 567 — 568 Cash, cash equivalents and restricted cash at end of period $ — $ — $ — $ 322 $ — $ 322 Statement of Cash Flows for the Three Months Ended March 31, 2018 Parent Subsidiary Guarantors Subsidiary Issuer/Guarantor Non-Guarantor Subsidiaries Eliminations Consolidated (in millions) Net cash (used in) provided by operating activities from continuing operations $ (36 ) $ — $ — $ 222 $ — $ 186 Net cash used in operating activities from discontinued operations — — — (31 ) — (31 ) Net cash (used in) provided by operating activities (36 ) — — 191 — 155 Cash flows from investing activities: Capital expenditures — — — (243 ) — (243 ) Proceeds from sale of property / investments — — — 3 — 3 Deposit for acquisition of KUM (5 ) — — — — (5 ) Loans to affiliates — — — (250 ) 250 — Net cash (used in) provided by investing activities (5 ) — — (490 ) 250 (245 ) Cash flows from financing activities: Net proceeds under other short-term debt agreements — — — 35 — 35 Proceeds from borrowings from affiliates 250 — — — (250 ) — Repurchase of ordinary shares (149 ) — — — — (149 ) Distribution of cash dividends (59 ) — — — — (59 ) Taxes withheld and paid on employees' restricted share awards — — — (32 ) — (32 ) Net cash provided by (used in) financing activities 42 — — 3 (250 ) (205 ) Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash — — — 44 — 44 Increase (decrease) in cash, cash equivalents and restricted cash 1 — — (252 ) — (251 ) Cash, cash equivalents and restricted cash at beginning of period 1 — — 1,596 — 1,597 Cash, cash equivalents and restricted cash at end of period $ 2 $ — $ — $ 1,344 $ — $ 1,346

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Included below are sales and operating data for Aptiv’s segments for the three months ended March 31, 2019 and 2018 . Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other (1) Total (in millions) For the Three Months Ended March 31, 2019: Net sales $ 2,562 $ 1,023 $ (10 ) $ 3,575 Depreciation and amortization $ 131 $ 42 $ — $ 173 Adjusted operating income $ 283 $ 62 $ — $ 345 Operating income $ 257 $ 40 $ — $ 297 Equity income, net of tax $ 3 $ — $ — $ 3 Net income attributable to noncontrolling interest $ 5 $ — $ — $ 5 Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other (1) Total (in millions) For the Three Months Ended March 31, 2018: Net sales $ 2,617 $ 1,032 $ (19 ) $ 3,630 Depreciation and amortization $ 119 $ 36 $ — $ 155 Adjusted operating income $ 351 $ 76 $ — $ 427 Operating income $ 322 $ 52 $ — $ 374 Equity income, net of tax $ 5 $ — $ — $ 5 Net income attributable to noncontrolling interest $ 9 $ — $ — $ 9 (1)
Reconciliation of Segment Adjusted OI to Consolidated Net Income	The reconciliation of Adjusted Operating Income to operating income includes, as applicable, restructuring, other acquisition and portfolio project costs (which includes costs incurred to integrate acquired businesses and to plan and execute product portfolio transformation actions, including business and product acquisitions and divestitures), asset impairments, gains (losses) on business divestitures and deferred compensation related to acquisitions. The reconciliations of Adjusted Operating Income to net income attributable to Aptiv for the three months ended March 31, 2019 and 2018 are as follows: Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) For the Three Months Ended March 31, 2019: Adjusted operating income $ 283 $ 62 $ — $ 345 Restructuring (19 ) (7 ) — (26 ) Other acquisition and portfolio project costs (7 ) (4 ) — (11 ) Deferred compensation related to nuTonomy acquisition — (11 ) — (11 ) Operating income $ 257 $ 40 $ — 297 Interest expense (38 ) Other income, net 16 Income before income taxes and equity income 275 Income tax expense (33 ) Equity income, net of tax 3 Net income 245 Net income attributable to noncontrolling interest 5 Net income attributable to Aptiv $ 240 Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) For the Three Months Ended March 31, 2018: Adjusted operating income $ 351 $ 76 $ — $ 427 Restructuring (18 ) (2 ) — (20 ) Other acquisition and portfolio project costs (11 ) (8 ) — (19 ) Deferred compensation related to nuTonomy acquisition — (14 ) — (14 ) Operating income $ 322 $ 52 $ — 374 Interest expense (34 ) Other income, net 30 Income before income taxes and equity income 370 Income tax expense (59 ) Equity income, net of tax 5 Net income 316 Net income attributable to noncontrolling interest 9 Net income attributable to Aptiv $ 307

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Mar. 31, 2019
Disaggregation of Revenue [Abstract]
Disaggregation of Revenue	Revenue generated from Aptiv’s operating segments is disaggregated by primary geographic market in the following tables for the three months ended March 31, 2019 and 2018 . Information concerning geographic market reflects the manufacturing location. For the Three Months Ended March 31, 2019: Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) Geographic Market North America $ 1,096 $ 326 $ (1 ) $ 1,421 Europe, Middle East and Africa 789 443 (3 ) 1,229 Asia Pacific 622 254 (6 ) 870 South America 55 — — 55 Total net sales $ 2,562 $ 1,023 $ (10 ) $ 3,575 For the Three Months Ended March 31, 2018: Signal and Power Solutions Advanced Safety and User Experience Eliminations and Other Total (in millions) Geographic Market North America $ 1,020 $ 335 $ (4 ) $ 1,351 Europe, Middle East and Africa 837 437 (5 ) 1,269 Asia Pacific 687 259 (10 ) 936 South America 73 1 — 74 Total net sales $ 2,617 $ 1,032 $ (19 ) $ 3,630

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Lease Cost	The components of lease expense were as follows: Three Months Ended March 31, 2019 (in millions) Lease cost: Finance lease cost: Amortization of right-of-use assets $ 1 Interest on lease liabilities — Total finance lease cost 1 Operating lease cost 29 Short-term lease cost 1 Variable lease cost 1 Sublease income (1) — Total lease cost $ 32
Supplemental Cash Flow Information Related to Leases	Supplemental cash flow and other information related to leases was as follows: Three Months Ended March 31, 2019 (in millions) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for finance leases $ — Operating cash flows for operating leases 27 Financing cash flows for finance leases 1 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 36 Finance leases —
Supplemental Balance Sheet Information Related to Leases	Supplemental balance sheet information related to leases was as follows: March 31, 2019 (dollars in millions) Operating leases: Operating lease right-of-use assets $ 434 Accrued liabilities (Note 5) $ 93 Long-term operating lease liabilities 350 Total operating lease liabilities $ 443 Finance leases: Property and equipment $ 22 Less: accumulated depreciation (5 ) Total property, net $ 17 Short-term debt (Note 8) $ 2 Long-term debt (Note 8) 16 Total finance lease liabilities $ 18 Weighted average remaining lease term: Operating leases 7 years Finance leases 7 years Weighted average discount rate: Operating leases 3.5 % Finance leases 5.5 %
Maturities of Lease Liabilities	Maturities of lease liabilities were as follows: Operating Leases Finance Leases (in millions) As of March 31, 2019: 2019 (remaining as of March 31, 2019) $ 80 $ 3 2020 96 4 2021 83 4 2022 69 3 2023 51 3 Thereafter 120 7 Total lease payments 499 24 Less: imputed interest (56 ) (6 ) Total $ 443 $ 18

General (Details)

General (Details)	Dec. 04, 2017	Nov. 22, 2017	May 19, 2011	Nov. 22, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Formation of PLC			May 19, 2011
Initial Offering Period				Nov. 22, 2011
Distribution Date	Dec. 4, 2017
Record Date		Nov. 22, 2017

Significant Accounting Polici_4

Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Significant Accounting Policies [Line Items]
Equity investments	$ 94		$ 72
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0	$ (9)
Intangible assets, net (excluding goodwill)	1,334		1,380
Amortization of intangible assets	34	$ 30
Goodwill	$ 2,503		2,524
Document Period End Date	Mar. 31, 2019
Other Long-Term Assets
Significant Accounting Policies [Line Items]
Equity investments	$ 94		72
GM
Significant Accounting Policies [Line Items]
Accounts and Other Receivables	252		169
VW
Significant Accounting Policies [Line Items]
Accounts and Other Receivables	$ 134		$ 149
Customer Concentration Risk | Total Net Sales | GM & VW
Significant Accounting Policies [Line Items]
Percentage of Total Net Sales	18.00%	19.00%
Customer Concentration Risk | Total Net Sales | GM
Significant Accounting Policies [Line Items]
Percentage of Total Net Sales	10.00%	11.00%
Customer Concentration Risk | Total Net Sales | VW
Significant Accounting Policies [Line Items]
Percentage of Total Net Sales	8.00%	8.00%
Retained Earnings
Significant Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 9	$ (9)

Inventories (Details)

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Productive material	$ 761	$ 724
Work-in-process	107	101
Finished goods	458	452
Total	$ 1,326	$ 1,277

Assets Current Assets (Details)

Assets Current Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Value added tax receivable	$ 195	$ 185
Prepaid insurance and other expenses	86	72
Reimbursable engineering costs	44	47
Notes receivable	35	43
Income and other taxes receivable	42	73
Deposits to vendors	7	4
Derivative financial instruments	5	6
Capitalized upfront fees	15	8
Other	6	7
Total	$ 435	$ 445

Assets Non Current assets (Deta

Assets Non Current assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred income taxes	$ 152	$ 143
Unamortized Revolving Credit Facility debt issuance costs	5	6
Income and other taxes receivable	27	6
Reimbursable engineering costs	166	137
Value added tax receivable	39	38
Equity investments	94	72
Derivative financial instruments	4	2
Capitalized upfront fees	67	64
Other	55	53
Total	$ 609	$ 521

Liabilities Other Liabilities,

Liabilities Other Liabilities, Current (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Payroll-related obligations	$ 241	$ 235
Employee benefits, including current pension obligations	55	96
Income and other taxes payable	189	187
Warranty obligations	30	33
Restructuring	59	55
Customer deposits	61	36
Derivative financial instruments	8	19
Accrued interest	24	42
Deferred compensation related to nuTonomy acquisition	38	31
Operating lease liabilities	93	0
Other	334	320
Total	$ 1,132	$ 1,054

Liabilities Other Liabilities_2

Liabilities Other Liabilities, Non Current (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Environmental	$ 4	$ 3
Extended disability benefits	5	5
Warranty obligations	17	17
Restructuring	39	49
Payroll-related obligations	10	10
Accrued income taxes	170	201
Deferred income taxes	242	233
Derivative financial instruments	3	9
Deferred compensation related to nuTonomy acquisition	22	18
Other	73	88
Total	$ 585	$ 633

Warranty Obligations (Details)

Warranty Obligations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Accrual balance at beginning of period	$ 50
Provision for estimated warranties incurred during the period	8
Provision for changes in estimate for pre-existing warranties	0
Settlements made during the period (in cash or in kind)	(11)
Foreign currency translation and other	0
Accrual balance at end of period	47
Minimum [Member] | Product Warranty
Product Warranty Liability [Line Items]
Range of Possible Loss, Portion Not Accrued	0
Maximum [Member] | Product Warranty
Product Warranty Liability [Line Items]
Range of Possible Loss, Portion Not Accrued	$ 15

Restructuring Narrative (Detail

Restructuring Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 26	$ 20
Document Period End Date	Mar. 31, 2019
Restructuring, Cash Expenditures	$ 31	36
Cost of Sales [Member] | Fair Value, Measurements, Nonrecurring [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	0	0
Advanced Safety and User Experience
Restructuring Cost and Reserve [Line Items]
Restructuring	7	2
EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 7	$ 12

Restructuring Restructuring Cos

Restructuring Restructuring Costs by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Document Period End Date	Mar. 31, 2019
Restructuring	$ 26	$ 20
Signal and Power Solutions
Restructuring Cost and Reserve [Line Items]
Restructuring	19	18
Advanced Safety and User Experience
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 7	$ 2

Restructuring Restructuring Lia

Restructuring Restructuring Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 104
Restructuring Charges	26	$ 20
Payments made during the period	(31)	$ (36)
Foreign currency and other	(1)
Ending Balance	98
Employee Termination Benefits Liability
Restructuring Reserve [Roll Forward]
Beginning Balance	104
Restructuring Charges	26
Payments made during the period	(31)
Foreign currency and other	(1)
Ending Balance	98
Other Exit Costs Liability
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Restructuring Charges	0
Payments made during the period	0
Foreign currency and other	0
Ending Balance	$ 0

Debt Outstanding (Details)

Debt Outstanding (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 14, 2019	Dec. 31, 2018	Sep. 20, 2016	Sep. 15, 2016	Nov. 19, 2015	Mar. 10, 2015	Mar. 03, 2014
Debt Instrument [Line Items]
Finance leases and other	$ 27		$ 32
Total debt	4,537		4,344
Less: current portion	(542)		(306)
Long-term debt	3,995		4,038
Senior Notes | Senior Notes, 3.15% Due 2020
Debt Instrument [Line Items]
Long-term debt	$ 0		648
Debt Instrument, Interest Rate, Stated Percentage	3.15%					3.15%
Debt Instrument, Maturity Date	Nov. 19, 2020
Unamortized debt issuance costs	$ 0		1
Unamortized discount	0		1
Senior Notes | Senior Notes, 4.150% Due 2024
Debt Instrument [Line Items]
Long-term debt	$ 696		696
Debt Instrument, Interest Rate, Stated Percentage	4.15%							4.15%
Debt Instrument, Maturity Date	Mar. 15, 2024
Unamortized debt issuance costs	$ 3		3
Unamortized discount	1		1
Senior Notes | Euro-Denominated Senior Notes, 1.500% Due 2025
Debt Instrument [Line Items]
Long-term debt	$ 782		795
Debt Instrument, Interest Rate, Stated Percentage	1.50%						1.50%
Debt Instrument, Maturity Date	Mar. 10, 2025
Unamortized debt issuance costs	$ 3		3
Unamortized discount	2		3
Senior Notes | Senior Notes, 4.25% Due 2026
Debt Instrument [Line Items]
Long-term debt	$ 647		647
Debt Instrument, Interest Rate, Stated Percentage	4.25%					4.25%
Debt Instrument, Maturity Date	Jan. 15, 2026
Unamortized debt issuance costs	$ 3		3
Senior Notes | Euro-denominated Senior Notes, 1.600% Due 2028
Debt Instrument [Line Items]
Long-term debt	$ 558		568
Debt Instrument, Interest Rate, Stated Percentage	1.60%				1.60%
Debt Instrument, Maturity Date	Sep. 15, 2028
Unamortized debt issuance costs	$ 3		3
Unamortized discount	1		1
Senior Notes | Senior Notes, 4.35% Due 2029
Debt Instrument [Line Items]
Long-term debt	$ 298		0
Debt Instrument, Interest Rate, Stated Percentage	4.35%	4.35%
Debt Instrument, Maturity Date	Mar. 14, 2029
Unamortized debt issuance costs	$ 2		0
Unamortized discount	0		0
Senior Notes | Senior Notes, 4.400% Due 2046
Debt Instrument [Line Items]
Long-term debt	$ 295		295
Debt Instrument, Interest Rate, Stated Percentage	4.40%			4.40%
Debt Instrument, Maturity Date	Oct. 1, 2046
Unamortized debt issuance costs	$ 3		3
Unamortized discount	2		2
Senior Notes | Senior Notes, 5.40% Due 2049
Debt Instrument [Line Items]
Long-term debt	$ 345		0
Debt Instrument, Interest Rate, Stated Percentage	5.40%	5.40%
Debt Instrument, Maturity Date	Mar. 14, 2049
Unamortized debt issuance costs	$ 3		0
Unamortized discount	2		0
Loans Payable | Tranche A Term Loan, Due 2021
Debt Instrument [Line Items]
Long-term debt	379		384
Unamortized debt issuance costs	$ 1		$ 1
JPMorgan Chase Bank, N.A. | Loans Payable | Tranche A Term Loan, Due 2021
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Aug. 17, 2021

Debt Credit Agreement (Details)

Debt Credit Agreement (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2016
Line of Credit Facility [Line Items]
Document Period End Date	Mar. 31, 2019
Letters of Credit Outstanding, Amount	$ 2	$ 2
Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Line of Credit Facility, Additional Borrowing Capacity	$ 1,000
Amended and Restated Credit Agreement | JPMorgan Chase Bank, N.A.
Line of Credit Facility [Line Items]
Covenant Compliance, Maximum Ratio of Indebtedness to EBITDA	350.00%
Amended and Restated Credit Agreement | Secured Debt
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	$ 1
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Amounts drawn	175	$ 0
Revolving Credit Facility | Revolving Credit Facility | JPMorgan Chase Bank, N.A.
Line of Credit Facility [Line Items]
Revolving Credit Facility, Maximum Borrowing Capacity	$ 2,000		$ 1,500
Revolving Credit Facility | Revolving Credit Facility | JPMorgan Chase Bank, N.A. | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.10%	1.10%
Revolving Credit Facility | Revolving Credit Facility | JPMorgan Chase Bank, N.A. | Administrative Agents Alternate Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.10%	0.10%
Revolving Credit Facility | Revolving Credit Facility | JPMorgan Chase Bank, N.A. | Line of Credit | LIBOR
Line of Credit Facility [Line Items]
Amounts drawn	$ 150
Rate effective	3.60%
Revolving Credit Facility | Revolving Credit Facility | JPMorgan Chase Bank, N.A. | Line of Credit | Administrative Agents Alternate Base Rate
Line of Credit Facility [Line Items]
Amounts drawn	$ 25
Rate effective	5.60%
Tranche A Term Loan, Due 2021 | JPMorgan Chase Bank, N.A. | Loans Payable
Line of Credit Facility [Line Items]
Debt Instrument, Maturity Date	Aug. 17, 2021
Tranche A Term Loan, Due 2021 | JPMorgan Chase Bank, N.A. | Loans Payable | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%	1.25%
Borrowings	$ 380
Rate effective	3.75%
Tranche A Term Loan, Due 2021 | JPMorgan Chase Bank, N.A. | Loans Payable | Administrative Agents Alternate Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.25%	0.25%

Debt Senior Unsecured Notes (De

Debt Senior Unsecured Notes (Details) € in Millions

Mar. 14, 2019USD ($)

Sep. 20, 2016USD ($)

Sep. 15, 2016USD ($)

Nov. 19, 2015USD ($)

Mar. 10, 2015USD ($)

Mar. 03, 2014USD ($)

Mar. 31, 2019USD ($)

Mar. 31, 2018USD ($)

Sep. 15, 2016EUR (€)

Mar. 10, 2015EUR (€)

Feb. 14, 2013USD ($)

May 17, 2011USD ($)

Debt Instrument [Line Items]

Document Period End Date

Mar. 31, 2019

Loss on extinguishment of debt

$ (6,000,000)

$ 0

Senior Notes, 5.875% Due 2019 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 500,000,000

Debt Instrument, Interest Rate, Stated Percentage

5.875%

Senior Notes, 6.125% Due 2021 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 500,000,000

Debt Instrument, Interest Rate, Stated Percentage

6.125%

Senior Notes, 5.000% Due 2023 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 800,000,000

Debt Instrument, Interest Rate, Stated Percentage

5.00%

Senior Notes, 4.150% Due 2024 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 700,000,000

Debt Instrument, Interest Rate, Stated Percentage

4.15%

4.15%

Debt Instrument, Maturity Date

Mar. 15, 2024

Payments of Debt Issuance Costs

$ 6,000,000

Debt Instrument, Price

99.649%

Debt Instrument, Interest Rate, Effective Percentage

4.193%

Euro-Denominated Senior Notes, 1.500% Due 2025 | Senior Notes

Debt Instrument [Line Items]

Debt Instrument, Interest Rate, Stated Percentage

1.50%

1.50%

Debt Instrument, Maturity Date

Mar. 10, 2025

Payments of Debt Issuance Costs

$ 5,000,000

Debt Instrument, Price

99.54%

Debt Instrument, Interest Rate, Effective Percentage

1.55%

Euro-Denominated Senior Notes, 1.500% Due 2025 | Senior Notes | Designated as Hedging Instrument | Net Investment Hedging

Debt Instrument [Line Items]

Senior notes issued | €

€ 700

2015 Senior Notes | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 1,300,000,000

Payments of Debt Issuance Costs

8,000,000

Senior Notes, 3.15% Due 2020 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 650,000,000

Loss on extinguishment of debt

$ (6,000,000)

Debt Instrument, Interest Rate, Stated Percentage

3.15%

3.15%

Debt Instrument, Maturity Date

Nov. 19, 2020

Debt Instrument, Price

99.784%

Debt Instrument, Interest Rate, Effective Percentage

3.197%

Senior Notes, 4.25% Due 2026 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 650,000,000

Debt Instrument, Interest Rate, Stated Percentage

4.25%

4.25%

Debt Instrument, Maturity Date

Jan. 15, 2026

Debt Instrument, Price

99.942%

Debt Instrument, Interest Rate, Effective Percentage

4.256%

Euro-denominated Senior Notes, 1.600% Due 2028 | Senior Notes

Debt Instrument [Line Items]

Debt Instrument, Interest Rate, Stated Percentage

1.60%

1.60%

Debt Instrument, Maturity Date

Sep. 15, 2028

Payments of Debt Issuance Costs

$ 4,000,000

Debt Instrument, Price

99.881%

Debt Instrument, Interest Rate, Effective Percentage

1.611%

Euro-denominated Senior Notes, 1.600% Due 2028 | Senior Notes | Designated as Hedging Instrument | Net Investment Hedging

Debt Instrument [Line Items]

Senior notes issued | €

€ 500

Senior Notes, 4.400% Due 2046 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 300,000,000

Debt Instrument, Interest Rate, Stated Percentage

4.40%

4.40%

Debt Instrument, Maturity Date

Oct. 1, 2046

Payments of Debt Issuance Costs

$ 3,000,000

Debt Instrument, Price

99.454%

Debt Instrument, Interest Rate, Effective Percentage

4.433%

2019 Senior Notes [Member] | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 650,000,000

Payments of Debt Issuance Costs

5,000,000

Senior Notes, 4.35% Due 2029 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 300,000,000

Debt Instrument, Interest Rate, Stated Percentage

4.35%

4.35%

Debt Instrument, Maturity Date

Mar. 14, 2029

Debt Instrument, Price

99.879%

Debt Instrument, Interest Rate, Effective Percentage

4.365%

Senior Notes, 5.40% Due 2049 | Senior Notes

Debt Instrument [Line Items]

Senior notes issued

$ 350,000,000

Debt Instrument, Interest Rate, Stated Percentage

5.40%

5.40%

Debt Instrument, Maturity Date

Mar. 14, 2049

Debt Instrument, Price

99.558%

Debt Instrument, Interest Rate, Effective Percentage

5.43%

Debt Other Financing (Details)

Debt Other Financing (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Mar. 31, 2019EUR (€)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount				$ 2	$ 2
Finance leases and other				27	32
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	$ 55	$ 45
Accounts Receivable Factoring
Debt Instrument [Line Items]
Accounts receivable factoring borrowings				335	279
European Factoring Program | Accounts Receivable Factoring
Debt Instrument [Line Items]
Maximum Funding From Factoring Program | €			€ 300
Accounts receivable factoring borrowings				$ 335	$ 279
European Factoring Program | EURIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	0.42%
Rate effective			0.42%	0.42%

Pension Benefits Narrative (Det

Pension Benefits Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Defined Benefit Pension Plan, Postemployment Benefit Period	5 years
Liability, Other Retirement Benefits	$ 3	$ 3

Pension Benefits Net Periodic B

Pension Benefits Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5	$ 5
Interest cost	7	7
Expected return on plan assets	(5)	(6)
Curtailment loss	0	1
Amortization of actuarial losses	3	4
Net periodic benefit cost	10	11
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	0	0
Expected return on plan assets	0	0
Curtailment loss	0	0
Amortization of actuarial losses	0	0
Net periodic benefit cost	$ 0	$ 0

Commitments And Contingencies B

Commitments And Contingencies Brazil Matters (Details) - Brazil $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Loss Contingencies [Line Items]
Brazil Loss Contingency, Claims asserted against Delphi	$ 145
Loss Contingency Accrual, at Carrying Value	30
Minimum [Member]
Loss Contingencies [Line Items]
Range of Possible Loss, Portion Not Accrued	0
Maximum [Member]
Loss Contingencies [Line Items]
Range of Possible Loss, Portion Not Accrued	$ 115

Commitments And Contingencies E

Commitments And Contingencies Environmental Matters (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Environmental Exit Cost [Line Items]
Accrual for Environmental Loss Contingencies	$ 5	$ 4
Accrued Environmental Loss Contingencies, Noncurrent	4	3
Accrued Liabilities
Environmental Exit Cost [Line Items]
Accrued Environmental Loss Contingencies, Current	1	1
Other Long-Term Liabilities
Environmental Exit Cost [Line Items]
Accrued Environmental Loss Contingencies, Noncurrent	$ 4	$ 3

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Income Tax Examination [Line Items]
Document Period End Date	Mar. 31, 2019
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount			$ 30
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 0	$ (9)
Income tax expense	$ 33	$ 59
Effective tax rate	12.00%	16.00%
Income Tax Expense (Benefit) associated with discrete items	$ (10)	$ (1)
Cash taxes paid	$ 36	$ 52
UNITED STATES
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount			$ 30	$ 50

Shareholders' Equity And Net _3

Shareholders' Equity And Net Income Per Share Weighted Average Shares Outstanding and Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Shareholders' Equity and Net Income Per Share Note [Abstract]
Document Period End Date	Mar. 31, 2019
Numerator:
Net income attributable to Aptiv	$ 240	$ 307
Denominator:
Weighted average number of basic shares outstanding	259,080,000	265,690,000
Dilutive shares related to restricted stock units	470,000	750,000
Weighted average ordinary shares outstanding, including dilutive shares	259,550,000	266,440,000
Basic net income per share:
Basic net income per share attributable to Aptiv	$ 0.93	$ 1.16
Diluted net income per share:
Diluted net income per share attributable to Aptiv	$ 0.92	$ 1.15
Antidilutive securities share impact	0	0

Shareholders' Equity And Net _4

Shareholders' Equity And Net Income Per Share Share Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share Repurchase Program [Line Items]
Document Period End Date	Mar. 31, 2019
Stock Repurchased During Period, in shares	2,840,079	1,676,144
Stock Repurchased, Average Price per Share	$ 79.57	$ 89.17
Stock Repurchased During Period, Value	$ 226	$ 149
Share Repurchase Program April 2016
Share Repurchase Program [Line Items]
Stock Repurchase Program, Authorized Amount	1,500
Stock Repurchase Program, Remaining Authorized Repurchase Amount	264
Share Repurchase Program January 2019 [Member]
Share Repurchase Program [Line Items]
Stock Repurchase Program, Authorized Amount	$ 2,000

Shareholders' Equity And Net _5

Shareholders' Equity And Net Income Per Share Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018
Document Period End Date		Mar. 31, 2019
Cash dividends per share		$ 0.22	$ 0.22	$ 0.22	$ 0.22	$ 0.22	$ 0.88
Payments of Cash Dividends		$ 57	$ 58	$ 58	$ 58	$ 59	$ 233
Subsequent Event
Cash dividends declared per share	$ 0.22

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period		$ (694)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		0	$ (9)
Accumulated other comprehensive income (loss), end of period		(682)	(436)
Designated as Hedging Instrument | Net Investment Hedging
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Gain (loss) on net investment hedge, net of tax		23	(37)
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period		(555)	(369)
Aggregate adjustment for the period (1)	[1]	0	57
Accumulated other comprehensive income (loss), end of period		(555)	(312)
Unrealized gains (losses) on derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period		(35)	4
Other comprehensive income (loss) before reclassifications (net of tax effect)		16	(18)
Reclassification to income (net of tax effect)		3	(5)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(8)	0
Accumulated other comprehensive income (loss), end of period		(24)	(19)
Net tax effect of Other comprehensive income before reclassifications		0	4
Net tax effect of Reclassification Adjustment from AOCI on Derivatives		0	1
Pension and postretirement plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning of period		(104)	(106)
Other comprehensive income (loss) before reclassifications (net of tax effect)		0	(3)
Reclassification to income (net of tax effect)		2	4
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(1)	0
Accumulated other comprehensive income (loss), end of period		(103)	(105)
Net tax effect of Other comprehensive income before reclassifications		0	1
Net tax effect of Reclassification Adjustment from AOCI, Pension and Other Postretirement Plans		$ 1	$ 0
[1]	Includes gains of $23 million and losses of $37 million for the three months ended March 31, 2019 and 2018

Changes in Accumulated Other _4

Changes in Accumulated Other Comprehensive Income AOCI Reclassifications (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		$ 2,962	$ 2,947
Income tax expense		(33)	(59)
Net income		245	316
Net income attributable to noncontrolling interest		(5)	(9)
Net income attributable to Aptiv		240	307
Amount Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to Aptiv		(5)	1
Amount Reclassified from Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes		(3)	4
Income tax expense		0	1
Net income		(3)	5
Net income attributable to noncontrolling interest		0	0
Net income attributable to Aptiv		(3)	5
Amount Reclassified from Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Commodity derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		2	(9)
Amount Reclassified from Accumulated Other Comprehensive Income | Unrealized gains (losses) on derivatives | Foreign currency derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		1	5
Amount Reclassified from Accumulated Other Comprehensive Income | Pension and postretirement plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial losses	[1]	(3)	(4)
Income before income taxes		(3)	(4)
Income tax expense		1	0
Net income		(2)	(4)
Net income attributable to noncontrolling interest		0	0
Net income attributable to Aptiv		$ (2)	$ (4)
[1]	These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 9. Pension Benefits for additional details).

Derivatives And Hedging Activ_3

Derivatives And Hedging Activities Cash Flow Hedges (Details) lb in Thousands, ₺ in Millions, € in Millions, ¥ in Millions, zł in Millions, $ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)	Mar. 31, 2019EUR (€)lb	Mar. 31, 2019USD ($)lb	Mar. 31, 2019MXN ($)lb	Mar. 31, 2019CNY (¥)lb	Mar. 31, 2019TRY (₺)lb	Mar. 31, 2019PLN (zł)lb
Derivative [Line Items]
Net derivative gains (losses) included in accumulated other comprehensive income, before tax				$ 2
Net derivative gains (losses) included in accumulated other comprehensive income, after tax				$ 2
Cash Flow Hedging | Copper
Derivative [Line Items]
Notional amount of derivative, nonmonetary (in lbs) | lb			76,959	76,959	76,959	76,959	76,959	76,959
Notional amount of derivative				$ 225
Cash Flow Hedging | Foreign currency derivatives | Mexican Peso
Derivative [Line Items]
Notional amount of derivative				730	$ 14,183
Cash Flow Hedging | Foreign currency derivatives | Chinese Yuan Renminbi
Derivative [Line Items]
Notional amount of derivative				490		¥ 3,284
Cash Flow Hedging | Foreign currency derivatives | Polish Zloty
Derivative [Line Items]
Notional amount of derivative				130				zł 505
Cash Flow Hedging | Foreign currency derivatives | Euro Member Countries, Euro
Derivative [Line Items]
Notional amount of derivative			€ 62	70
Cash Flow Hedging | Foreign currency derivatives | New Turkish Lira
Derivative [Line Items]
Notional amount of derivative				$ 10			₺ 50
Scenario, Forecast [Member] | Cost of Sales [Member]
Derivative [Line Items]
Loss Reclassified from Accumulated OCI into Income (Effective Portion)		$ (3)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	$ 1

Derivatives And Hedging Activ_4

Derivatives And Hedging Activities Net Investment Hedges (Details) € in Millions, ¥ in Millions, $ in Millions, ₩ in Billions

1 Months Ended

3 Months Ended

Mar. 31, 2019USD ($)

Dec. 31, 2018USD ($)

Jun. 30, 2018USD ($)

Mar. 31, 2019USD ($)

Mar. 31, 2018USD ($)

Mar. 31, 2019CNY (¥)

Dec. 31, 2018CNY (¥)

Jun. 30, 2018CNY (¥)

Mar. 01, 2018USD ($)

Mar. 01, 2018KRW (₩)

Dec. 31, 2017USD ($)

Dec. 31, 2017CNY (¥)

Sep. 15, 2016EUR (€)

Mar. 10, 2015EUR (€)

Derivative [Line Items]

Settlement of derivatives

$ 2

$ 0

Net Investment Hedging | Designated as Hedging Instrument

Derivative [Line Items]

Gain (loss) on net investment hedge, net of tax

23

(37)

Net Investment Hedging | Designated as Hedging Instrument | Euro-Denominated Senior Notes, 1.500% Due 2025 | Senior Notes

Derivative [Line Items]

Debt instrument designated as net investment hedge | €

€ 700

Net Investment Hedging | Designated as Hedging Instrument | Euro-denominated Senior Notes, 1.600% Due 2028 | Senior Notes

Derivative [Line Items]

Debt instrument designated as net investment hedge | €

€ 500

Net Investment Hedging | Designated as Hedging Instrument | Euro-Denominated Senior Notes, 1.500% Due 2025 and Euro-Denominated Senior Notes, 1.600% Due 2028 | Senior Notes

Derivative [Line Items]

Gain (loss) on net investment hedge, net of tax

23

(37)

Net investment hedge gains (losses) included in accumulated other comprehensive income

$ (27)

$ (50)

(27)

Foreign exchange forward | China, Yuan Renminbi | Net Investment Hedging | Designated as Hedging Instrument

Derivative [Line Items]

Notional amount of derivative

50

85

$ 75

$ 50

¥ 334

¥ 570

¥ 486

$ 290

¥ 1,900

Settlement of derivatives

$ 2

$ (4)

$ 10

KUM | Foreign exchange forward | Korea (South), Won | Not Designated as Hedging Instrument

Derivative [Line Items]

Notional amount of derivative

$ 520

₩ 559

Derivative, Gain (Loss) on Derivative, Net

$ 11

Derivatives And Hedging Activ_5

Derivatives And Hedging Activities Derivatives Not Designated as Hedges (Details) $ in Millions, ₩ in Billions	3 Months Ended
	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Mar. 01, 2018USD ($)	Mar. 01, 2018KRW (₩)
Derivative [Line Items]
Derivative, Cash Received on Hedge	$ (2)	$ 0
KUM | Not Designated as Hedging Instrument | Foreign exchange forward | Korea (South), Won
Derivative [Line Items]
Notional amount of derivative			$ 520	₩ 559
Derivative, Gain (Loss) on Derivative, Net		$ 11

Derivatives And Hedging Activ_6

Derivatives And Hedging Activities Fair Value of Derivative Instruments in the Balance Sheet (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Document Period End Date		Mar. 31, 2019
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Gross amount of recognized asset derivatives		$ 17	$ 11
Gross amount of recognized liability derivatives		19	31
Cash Flow Hedging | Designated as Hedging Instrument | Commodity derivatives | Other Current Assets
Derivatives, Fair Value [Line Items]
Gross amount of recognized asset derivatives		0	0
Cash Flow Hedging | Designated as Hedging Instrument | Commodity derivatives | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Gross amount of recognized liability derivatives		2	15
Cash Flow Hedging | Designated as Hedging Instrument | Commodity derivatives | Other Long-Term Assets
Derivatives, Fair Value [Line Items]
Gross amount of recognized asset derivatives		2	0
Cash Flow Hedging | Designated as Hedging Instrument | Commodity derivatives | Other Long-Term Liabilities
Derivatives, Fair Value [Line Items]
Gross amount of recognized liability derivatives		0	7
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency derivatives | Other Current Assets
Derivatives, Fair Value [Line Items]
Gross amount of recognized asset derivatives	[1]	9	9
Gross amount of recognized liability derivatives	[1]	4	3
Net amount of derivative asset presented in the Balance Sheet	[1]	5	6
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency derivatives | Accrued Liabilities
Derivatives, Fair Value [Line Items]
Gross amount of recognized asset derivatives	[1]	2	0
Gross amount of recognized liability derivatives	[1]	8	4
Net amount of derivative liability presented in the Balance Sheet	[1]	(6)	(4)
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency derivatives | Other Long-Term Assets
Derivatives, Fair Value [Line Items]
Gross amount of recognized asset derivatives	[1]	3	2
Gross amount of recognized liability derivatives	[1]	1	0
Net amount of derivative asset presented in the Balance Sheet	[1]	2	2
Cash Flow Hedging | Designated as Hedging Instrument | Foreign currency derivatives | Other Long-Term Liabilities
Derivatives, Fair Value [Line Items]
Gross amount of recognized asset derivatives	[1]	1	0
Gross amount of recognized liability derivatives	[1]	4	2
Net amount of derivative liability presented in the Balance Sheet	[1]	$ (3)	$ (2)
[1]	Derivative instruments within this category are subject to master netting arrangements and are presented on a net basis in the consolidated balance sheets in accordance with accounting guidance related to the offsetting of amounts related to certain contracts.

Derivatives And Hedging Activ_7

Derivatives And Hedging Activities Effect of Derivative Instruments in Consolidated Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 16	$ (14)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion		4
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	3
Designated as Hedging Instrument | Cash Flow Hedging | Commodity derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	20	(17)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion		9
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	2
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(2)	16
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	1	5
Designated as Hedging Instrument | Net Investment Hedging | Foreign currency derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(2)	(13)
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion		0
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	0
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Loss on Derivative	0	10
Not Designated as Hedging Instrument | Foreign currency derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Loss on Derivative	$ 0	$ 10

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Fair Value, Net	$ (2)		$ (20)
Total debt, recorded amount	4,537		4,344
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	50		49
Cost of Sales [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	0	$ 0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt, fair value	4,591		4,222
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	0		0
Other Current Liabilities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	32		16
Other Long-Term Liabilities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	18		33
Contingent Consideration Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payments	0
Contingent Consideration Liability | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability	$ 50		$ 49
Minimum [Member] | Contingent Consideration Liability | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Periods in which milestones are expected to be achieved	2019
Maximum [Member] | Contingent Consideration Liability | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Periods in which milestones are expected to be achieved	2020

Fair Value Of Financial Instr_4

Fair Value Of Financial Instruments Unobservable Inputs Reconciliation (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	$ 49
Fair value at end of period	50
Contingent Consideration Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Additions	0
Payments	0
Interest accretion	1
Contingent Consideration Liability | Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of period	49
Fair value at end of period	$ 50

Fair Value Of Financial Instr_5

Fair Value Of Financial Instruments Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 9		$ 8
Contingent consideration liability	50		49
Financial and Nonfinancial Liabilities, Fair Value Disclosure	61		77
Fair Value, Measurements, Recurring | Commodity derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	2
Derivative Liability	2		22
Fair Value, Measurements, Recurring | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	7		8
Derivative Liability	9		6
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0		0
Contingent consideration liability	0		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Commodity derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0
Derivative Liability	0		0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liability	0		0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	9		8
Contingent consideration liability	0		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	11		28
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commodity derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	2
Derivative Liability	2		22
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	7		8
Derivative Liability	9		6
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0		0
Contingent consideration liability	50		49
Financial and Nonfinancial Liabilities, Fair Value Disclosure	50		49
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Commodity derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0
Derivative Liability	0		0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liability	0		$ 0
Cost of Sales [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset Impairment Charges	$ 0	$ 0

Other Income, Net Table (Detail

Other Income, Net Table (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest income	$ 3	$ 5
Loss on extinguishment of debt	(6)	0
Components of net periodic benefit cost other than service cost (Note 9)	(5)	(6)
Business Combination, Acquisition Related Costs	0	11
Change in fair value of equity investments	19	0
Other, net	5	20
Other (expense) income, net	$ 16	30
Powertrain Systems | Other income (expense), net | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member]
Transition Services Agreement Fees		$ 3

Other Income, Net Narrative (De

Other Income, Net Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Feb. 14, 2013
Debt Instrument [Line Items]
Change in fair value of equity investments	$ 19,000,000	$ 0
Business Combination, Acquisition Related Costs	0	(11,000,000)
Loss on extinguishment of debt	$ (6,000,000)	0
Senior Notes | Senior Notes, 5.000% Due 2023
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 800,000,000
Powertrain Systems | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member] | Other income (expense), net
Debt Instrument [Line Items]
Transition Services Agreement Fees		3,000,000
Not Designated as Hedging Instrument | Korea (South), Won | Foreign exchange forward | KUM
Debt Instrument [Line Items]
Derivative, Gain (Loss) on Derivative, Net		$ 11,000,000

Acquisitions And Divestitures A

Acquisitions And Divestitures Acquisition of Winchester (Details) - USD ($) $ in Millions	Oct. 24, 2018	Mar. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Document Period End Date		Mar. 31, 2019
Goodwill		$ 2,503	$ 2,524
Equity investments		$ 94	$ 72
Winchester
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Combination, Consideration Transferred	$ 680
Other assets purchased and liabilities assumed, net	25
Intangible assets	226
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	31
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	282
Goodwill	398
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	680
Customer Relationships [Member] | Winchester
Business Acquisition [Line Items]
Intangible assets	$ 180
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years
Patented Technology [Member] | Winchester
Business Acquisition [Line Items]
Intangible assets	$ 9
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Trade Names [Member] | Winchester
Business Acquisition [Line Items]
Intangible assets	$ 37

Acquisitions And Divestitures_2

Acquisitions And Divestitures Acquisition of KUM (Details) - USD ($) $ in Millions	Jun. 14, 2018	Mar. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 2,503	$ 2,524
KUM
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Purchase price, cash consideration, net of cash acquired	$ 515
Business Combination, Consideration Transferred, Liabilities Incurred	11
Business Combination, Consideration Transferred	526
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	121
Intangible assets	110
Other assets purchased and liabilities assumed, net	31
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	262
Goodwill	264
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 526
Customer Relationships [Member] | KUM
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years

Acquisitions And Divestitures_3

Acquisitions And Divestitures Acquisition of Falmat (Details)	3 Months Ended
	Mar. 31, 2019
Business Acquisition [Line Items]
Document Period End Date	Mar. 31, 2019

Acquisitions And Divestitures T

Acquisitions And Divestitures Technology Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition [Line Items]
Payments to Acquire Interest in Joint Venture	$ 3		$ 0
Equity investments	94	$ 72
Change in fair value of equity investments	19		$ 0
Quanergy | Advanced Safety and User Experience
Business Acquisition [Line Items]
Equity investments	6
Innoviz Technologies | Advanced Safety and User Experience
Business Acquisition [Line Items]
Equity investments	15
Leddartech | Advanced Safety and User Experience
Business Acquisition [Line Items]
Equity investments	10
Otonomo | Advanced Safety and User Experience
Business Acquisition [Line Items]
Payments to Acquire Interest in Joint Venture	3			$ 15
Equity investments	37
Affectiva [Member] | Advanced Safety and User Experience
Business Acquisition [Line Items]
Payments to Acquire Interest in Joint Venture		$ 15
Equity investments	15
Valens Semiconductor | Signal and Power Solutions
Business Acquisition [Line Items]
Equity investments	10
Other [Member] | Advanced Safety and User Experience
Business Acquisition [Line Items]
Equity investments	$ 1

Share-Based Compensation Long T

Share-Based Compensation Long Term Incentive Plan (Details) - USD ($) $ in Millions

Apr. 25, 2019

Apr. 24, 2019

Apr. 26, 2018

Apr. 25, 2018

Apr. 27, 2017

Feb. 28, 2019

Feb. 28, 2018

Feb. 28, 2017

Feb. 29, 2016

Feb. 28, 2015

Mar. 31, 2019

Mar. 31, 2018

Apr. 23, 2015

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Document Period End Date

Mar. 31, 2019

PLC Long Term Incentive Plan

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Maximum Shares Available for Grant under PLC LTIP

25,665,448

PLC Long Term Incentive Plan | Minimum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance-Based Awards Payout % Range

0.00%

PLC Long Term Incentive Plan | Maximum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Performance-Based Awards Payout % Range

200.00%

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

855,000

Grant Date Fair Value

$ 62

$ 61

$ 63

$ 48

$ 76

Time-Based Awards % Granted For Officers

25.00%

Time-Based Awards % Granted For Executives

50.00%

Performance-Based Awards % Granted For Officers

75.00%

Performance-Based Awards % Granted For Executives

50.00%

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Board of Directors

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

22,676

26,782

Grant Date Fair Value

$ 2

$ 2

RSU's Issued in Period, Gross

24,642

Fair Value of RSUs Vested in Period

$ 2

RSU's, Used to Pay Witholding Taxes

(2,649)

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | 2015 Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

900,000

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | 2016 Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

710,000

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | 2017 Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

800,000

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | 2018 Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

630,000

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | 2019 Grant [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

710,000

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | Time-Based

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Issued in Period, Gross

529,812

285,344

Fair Value of RSUs Vested in Period

$ 44

$ 26

RSU's, Used to Pay Witholding Taxes

203,839

102,045

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | Performance-Based | 2015 Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Issued in Period, Gross

640,239

Fair Value of RSUs Vested in Period

$ 59

RSU's, Used to Pay Witholding Taxes

240,483

PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Executives | Performance-Based | 2016 Grant

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Issued in Period, Gross

493,674

Fair Value of RSUs Vested in Period

$ 41

RSU's, Used to Pay Witholding Taxes

199,547

Subsequent Event | PLC Long Term Incentive Plan | Restricted Stock Units (RSUs) | Board of Directors

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSU's Granted

20,765

Grant Date Fair Value

$ 2

RSU's Issued in Period, Gross

23,999

Fair Value of RSUs Vested in Period

$ 2

RSU's, Used to Pay Witholding Taxes

(3,228)

Share-Based Compensation Weight

Share-Based Compensation Weighting for Components of Performance Based RSU Awards (Details) - PLC Long Term Incentive Plan	3 Months Ended
	Mar. 31, 2019
2015 Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average return on net assets	50.00%	[1]
Cumulative earnings per share	30.00%
Relative total shareholder return	20.00%	[2]
2016 - 2019 Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average return on net assets	50.00%	[1]
Cumulative net income	25.00%
Relative total shareholder return	25.00%	[2]
[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]	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.

Share-Based Compensation Summar

Share-Based Compensation Summary of Activity for LTIP RSU's (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments Related to Tax Withholding for Share-based Compensation	$ 34	$ 32
PLC Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
LTIP Nonvested, Weighted Average Grant Date Fair Value per share	$ 86.10		$ 81.24
LTIP Grants in Period, Weighted Average Grant Date Fair Value per share	86.75
LTIP Vested in Period, Weighted Average Grant Date Fair Value per share	70.05
LTIP RSUs, Forfeitures, Weighted Average Grant Date Fair Value per share	$ 83.83
Share-based Compensation Expense	$ 15	13
Share-based Compensation Expense, net of tax	15	12
Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 138
Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2 years
Payments Related to Tax Withholding for Share-based Compensation	$ 34	$ 32
PLC Long Term Incentive Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
LTIP Shares, Nonvested, Number	2,176		1,879
RSU's Granted	855
LTIP RSUs, Vested in Period	(530)
LTIP RSUs, Forfeited in Period	(28)

Supplemental Guarantor And No_3

Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 3,575	$ 3,630
Cost of sales	2,962	2,947
Selling, general and administrative	256	259
Amortization	34	30
Restructuring	26	20
Total operating expenses	3,278	3,256
Operating income (loss)	297	374
Interest expense	(38)	(34)
Other (expense) income, net	16	30
Income before income taxes and equity income	275	370
Income tax expense	(33)	(59)
Income before equity income	242	311
Equity income, net of tax	3	5
Equity in net income (loss) of subsidiaries	0	0
Net income	245	316
Net income attributable to noncontrolling interest	5	9
Net income attributable to Aptiv	240	307
Reportable Legal Entities | Parent
Net sales	0	0
Cost of sales	0	0
Selling, general and administrative	(39)	(4)
Amortization	0	0
Restructuring	0	0
Total operating expenses	(39)	(4)
Operating income (loss)	39	4
Interest expense	(30)	(61)
Other (expense) income, net	(6)	0
Income before income taxes and equity income	3	(57)
Income tax expense	0	0
Income before equity income	3	(57)
Equity income, net of tax	0	0
Equity in net income (loss) of subsidiaries	237	364
Net income	240	307
Net income attributable to noncontrolling interest	0	0
Net income attributable to Aptiv	240	307
Reportable Legal Entities | Subsidiary Guarantors
Net sales	0	0
Cost of sales	0	0
Selling, general and administrative	0	0
Amortization	0	0
Restructuring	0	0
Total operating expenses	0	0
Operating income (loss)	0	0
Interest expense	(48)	(7)
Other (expense) income, net	0	0
Income before income taxes and equity income	(48)	(7)
Income tax expense	0	0
Income before equity income	(48)	(7)
Equity income, net of tax	0	0
Equity in net income (loss) of subsidiaries	218	263
Net income	170	256
Net income attributable to noncontrolling interest	0	0
Net income attributable to Aptiv	170	256
Reportable Legal Entities | Subsidiary Issuer/Guarantor
Net sales	0	0
Cost of sales	0	0
Selling, general and administrative	0	0
Amortization	0	0
Restructuring	0	0
Total operating expenses	0	0
Operating income (loss)	0	0
Interest expense	(60)	(43)
Other (expense) income, net	36	0
Income before income taxes and equity income	(24)	(43)
Income tax expense	5	10
Income before equity income	(19)	(33)
Equity income, net of tax	0	0
Equity in net income (loss) of subsidiaries	25	(29)
Net income	6	(62)
Net income attributable to noncontrolling interest	0	0
Net income attributable to Aptiv	6	(62)
Reportable Legal Entities | Non-Guarantor Subsidiaries
Net sales	3,575	3,630
Cost of sales	2,962	2,947
Selling, general and administrative	295	263
Amortization	34	30
Restructuring	26	20
Total operating expenses	3,317	3,260
Operating income (loss)	258	370
Interest expense	(17)	(1)
Other (expense) income, net	103	108
Income before income taxes and equity income	344	477
Income tax expense	(38)	(69)
Income before equity income	306	408
Equity income, net of tax	3	5
Equity in net income (loss) of subsidiaries	0	0
Net income	309	413
Net income attributable to noncontrolling interest	5	9
Net income attributable to Aptiv	304	404
Eliminations
Net sales	0	0
Cost of sales	0	0
Selling, general and administrative	0	0
Amortization	0	0
Restructuring	0	0
Total operating expenses	0	0
Operating income (loss)	0	0
Interest expense	117	78
Other (expense) income, net	(117)	(78)
Income before income taxes and equity income	0	0
Income tax expense	0	0
Income before equity income	0	0
Equity income, net of tax	0	0
Equity in net income (loss) of subsidiaries	(480)	(598)
Net income	(480)	(598)
Net income attributable to noncontrolling interest	0	0
Net income attributable to Aptiv	$ (480)	$ (598)

Supplemental Guarantor And No_4

Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income	$ 245	$ 316
Currency translation adjustments	1	61
Net change in unrecognized gain (loss) on derivative instruments, net of tax	19	(23)
Employee benefit plans adjustment, net of tax	2	1
Other comprehensive income (loss)	22	39
Equity in other comprehensive income (loss) of subsidiaries	0	0
Comprehensive income	267	355
Comprehensive income attributable to noncontrolling interests	6	13
Comprehensive income attributable to Aptiv	261	342
Reportable Legal Entities | Parent
Net income	240	307
Currency translation adjustments	23	(37)
Net change in unrecognized gain (loss) on derivative instruments, net of tax	0	0
Employee benefit plans adjustment, net of tax	0	0
Other comprehensive income (loss)	23	(37)
Equity in other comprehensive income (loss) of subsidiaries	(2)	72
Comprehensive income	261	342
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to Aptiv	261	342
Reportable Legal Entities | Subsidiary Guarantors
Net income	170	256
Currency translation adjustments	0	0
Net change in unrecognized gain (loss) on derivative instruments, net of tax	0	0
Employee benefit plans adjustment, net of tax	0	0
Other comprehensive income (loss)	0	0
Equity in other comprehensive income (loss) of subsidiaries	19	17
Comprehensive income	189	273
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to Aptiv	189	273
Reportable Legal Entities | Subsidiary Issuer/Guarantor
Net income	6	(62)
Currency translation adjustments	0	0
Net change in unrecognized gain (loss) on derivative instruments, net of tax	0	0
Employee benefit plans adjustment, net of tax	0	0
Other comprehensive income (loss)	0	0
Equity in other comprehensive income (loss) of subsidiaries	(10)	21
Comprehensive income	(4)	(41)
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to Aptiv	(4)	(41)
Reportable Legal Entities | Non-Guarantor Subsidiaries
Net income	309	413
Currency translation adjustments	(22)	98
Net change in unrecognized gain (loss) on derivative instruments, net of tax	19	(23)
Employee benefit plans adjustment, net of tax	2	1
Other comprehensive income (loss)	(1)	76
Equity in other comprehensive income (loss) of subsidiaries	0	0
Comprehensive income	308	489
Comprehensive income attributable to noncontrolling interests	6	13
Comprehensive income attributable to Aptiv	302	476
Eliminations
Net income	(480)	(598)
Currency translation adjustments	0	0
Net change in unrecognized gain (loss) on derivative instruments, net of tax	0	0
Employee benefit plans adjustment, net of tax	0	0
Other comprehensive income (loss)	0	0
Equity in other comprehensive income (loss) of subsidiaries	(7)	(110)
Comprehensive income	(487)	(708)
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to Aptiv	$ (487)	$ (708)

Supplemental Guarantor And No_5

Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Cash and cash equivalents	$ 321	$ 567
Restricted cash	1	1
Accounts receivable, net	2,736	2,487
Intercompany receivables, current	0	0
Inventories	1,326	1,277
Other current assets	435	445
Total current assets	4,819	4,777
Intercompany receivables, long-term	0	0
Property, net	3,218	3,179
Operating Lease, Right-of-Use Asset	434	0
Investments in affiliates	102	99
Investments in subsidiaries	0	0
Intangible assets, net	3,837	3,904
Other long-term assets	609	521
Total long-term assets	8,200	7,703
Total assets	13,019	12,480
Short-term debt	542	306
Accounts payable	2,340	2,334
Intercompany payables, current	0	0
Accrued liabilities	1,132	1,054
Total current liabilities	4,014	3,694
Long-term debt	3,995	4,038
Intercompany payables, long-term	0	0
Pension benefit obligations	440	445
Operating Lease, Liability, Noncurrent	350	0
Other long-term liabilities	585	633
Total long-term liabilities	5,370	5,116
Total liabilities	9,384	8,810
Total Aptiv shareholders' equity	3,418	3,459
Noncontrolling interest	217	211
Total shareholders' equity	3,635	3,670	$ 3,698	$ 3,517
Total liabilities and shareholders' equity	13,019	12,480
Reportable Legal Entities | Parent
Cash and cash equivalents	0	1
Restricted cash	0	0
Accounts receivable, net	0	0
Intercompany receivables, current	51	54
Inventories	0	0
Other current assets	0	0
Total current assets	51	55
Intercompany receivables, long-term	0	0
Property, net	0	0
Operating Lease, Right-of-Use Asset	0
Investments in affiliates	0	0
Investments in subsidiaries	7,632	7,392
Intangible assets, net	0	0
Other long-term assets	0	0
Total long-term assets	7,632	7,392
Total assets	7,683	7,447
Short-term debt	0	0
Accounts payable	0	2
Intercompany payables, current	1,103	791
Accrued liabilities	20	31
Total current liabilities	1,123	824
Long-term debt	2,925	2,953
Intercompany payables, long-term	0	0
Pension benefit obligations	0	0
Operating Lease, Liability, Noncurrent	0
Other long-term liabilities	0	0
Total long-term liabilities	2,925	2,953
Total liabilities	4,048	3,777
Total Aptiv shareholders' equity	3,635	3,670
Noncontrolling interest	0	0
Total shareholders' equity	3,635	3,670
Total liabilities and shareholders' equity	7,683	7,447
Reportable Legal Entities | Subsidiary Guarantors
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable, net	0	0
Intercompany receivables, current	16	16
Inventories	0	0
Other current assets	0	0
Total current assets	16	16
Intercompany receivables, long-term	0	0
Property, net	0	0
Operating Lease, Right-of-Use Asset	0
Investments in affiliates	0	0
Investments in subsidiaries	8,143	7,860
Intangible assets, net	0	0
Other long-term assets	0	0
Total long-term assets	8,143	7,860
Total assets	8,159	7,876
Short-term debt	0	0
Accounts payable	0	0
Intercompany payables, current	4,527	4,479
Accrued liabilities	0	0
Total current liabilities	4,527	4,479
Long-term debt	0	0
Intercompany payables, long-term	0	0
Pension benefit obligations	0	0
Operating Lease, Liability, Noncurrent	0
Other long-term liabilities	0	0
Total long-term liabilities	0	0
Total liabilities	4,527	4,479
Total Aptiv shareholders' equity	3,632	3,397
Noncontrolling interest	0	0
Total shareholders' equity	3,632	3,397
Total liabilities and shareholders' equity	8,159	7,876
Reportable Legal Entities | Subsidiary Issuer/Guarantor
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable, net	0	0
Intercompany receivables, current	3,256	3,114
Inventories	0	0
Other current assets	0	0
Total current assets	3,256	3,114
Intercompany receivables, long-term	768	768
Property, net	0	0
Operating Lease, Right-of-Use Asset	0
Investments in affiliates	0	0
Investments in subsidiaries	1,779	1,568
Intangible assets, net	0	0
Other long-term assets	5	6
Total long-term assets	2,552	2,342
Total assets	5,808	5,456
Short-term debt	205	25
Accounts payable	0	0
Intercompany payables, current	2,513	2,115
Accrued liabilities	4	11
Total current liabilities	2,722	2,151
Long-term debt	1,045	1,055
Intercompany payables, long-term	1,315	1,296
Pension benefit obligations	0	0
Operating Lease, Liability, Noncurrent	0
Other long-term liabilities	0	0
Total long-term liabilities	2,360	2,351
Total liabilities	5,082	4,502
Total Aptiv shareholders' equity	726	954
Noncontrolling interest	0	0
Total shareholders' equity	726	954
Total liabilities and shareholders' equity	5,808	5,456
Reportable Legal Entities | Non-Guarantor Subsidiaries
Cash and cash equivalents	321	566
Restricted cash	1	1
Accounts receivable, net	2,736	2,487
Intercompany receivables, current	4,820	4,201
Inventories	1,326	1,277
Other current assets	435	445
Total current assets	9,639	8,977
Intercompany receivables, long-term	1,458	1,424
Property, net	3,218	3,179
Operating Lease, Right-of-Use Asset	434
Investments in affiliates	102	99
Investments in subsidiaries	0	0
Intangible assets, net	3,837	3,904
Other long-term assets	604	515
Total long-term assets	9,653	9,121
Total assets	19,292	18,098
Short-term debt	337	281
Accounts payable	2,340	2,332
Intercompany payables, current	0	0
Accrued liabilities	1,108	1,012
Total current liabilities	3,785	3,625
Long-term debt	25	30
Intercompany payables, long-term	911	896
Pension benefit obligations	440	445
Operating Lease, Liability, Noncurrent	350
Other long-term liabilities	585	633
Total long-term liabilities	2,311	2,004
Total liabilities	6,096	5,629
Total Aptiv shareholders' equity	12,979	12,258
Noncontrolling interest	217	211
Total shareholders' equity	13,196	12,469
Total liabilities and shareholders' equity	19,292	18,098
Eliminations
Cash and cash equivalents	0	0
Restricted cash	0	0
Accounts receivable, net	0	0
Intercompany receivables, current	(8,143)	(7,385)
Inventories	0	0
Other current assets	0	0
Total current assets	(8,143)	(7,385)
Intercompany receivables, long-term	(2,226)	(2,192)
Property, net	0	0
Operating Lease, Right-of-Use Asset	0
Investments in affiliates	0	0
Investments in subsidiaries	(17,554)	(16,820)
Intangible assets, net	0	0
Other long-term assets	0	0
Total long-term assets	(19,780)	(19,012)
Total assets	(27,923)	(26,397)
Short-term debt	0	0
Accounts payable	0	0
Intercompany payables, current	(8,143)	(7,385)
Accrued liabilities	0	0
Total current liabilities	(8,143)	(7,385)
Long-term debt	0	0
Intercompany payables, long-term	(2,226)	(2,192)
Pension benefit obligations	0	0
Operating Lease, Liability, Noncurrent	0
Other long-term liabilities	0	0
Total long-term liabilities	(2,226)	(2,192)
Total liabilities	(10,369)	(9,577)
Total Aptiv shareholders' equity	(17,554)	(16,820)
Noncontrolling interest	0	0
Total shareholders' equity	(17,554)	(16,820)
Total liabilities and shareholders' equity	$ (27,923)	$ (26,397)

Supplemental Guarantor And No_6

Supplemental Guarantor And Non-Guarantor Condensed Consolidating Financial Statements Statement of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Repayments of Unsecured Debt	$ 654	$ 0
Net cash provided by (used in) operating activities from continuing operations	84	186
Net cash used in operating activities from discontinued operations	0	(31)
Net cash provided by operating activities	84	155
Capital expenditures	(235)	(243)
Proceeds from sale of property / investments	(3)	(3)
Cost of business acquisitions, net of cash acquired	2	0
Cost of technology investments	(3)	0
Settlement of derivatives	2	0
Loans to affiliates	0	0
Proceeds from (Repayments of) Related Party Debt	0
Net cash used in investing activities	(235)	(245)
Net proceeds (repayments) under other short-term debt agreements	229	35
Proceeds from issuance of senior notes, net of issuance costs	643	0
Proceeds from borrowings from affiliates	0	0
Payments on borrowings from affiliates	0
Repurchase of ordinary shares	(226)	(149)
Distribution of cash dividends	(57)	(59)
Taxes withheld and paid on employees' restricted share awards	(34)	(32)
Net cash used in financing activities	(99)	(205)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	4	44
Increase (decrease) in cash, cash equivalents and restricted cash	(246)	(251)
Cash, cash equivalents and restricted cash	322	1,346	$ 568	$ 1,597
Other Payments to Acquire Businesses	0	(5)
Reportable Legal Entities | Parent
Repayments of Unsecured Debt	654
Net cash provided by (used in) operating activities from continuing operations	(10)	(36)
Net cash used in operating activities from discontinued operations	0	0
Net cash provided by operating activities	(10)	(36)
Capital expenditures	0	0
Proceeds from sale of property / investments	0	0
Cost of business acquisitions, net of cash acquired	0
Cost of technology investments	0
Settlement of derivatives	0
Loans to affiliates	0	0
Proceeds from (Repayments of) Related Party Debt	0
Net cash used in investing activities	0	(5)
Net proceeds (repayments) under other short-term debt agreements	0	0
Proceeds from issuance of senior notes, net of issuance costs	643
Proceeds from borrowings from affiliates	303	250
Payments on borrowings from affiliates	0
Repurchase of ordinary shares	(226)	(149)
Distribution of cash dividends	(57)	(59)
Taxes withheld and paid on employees' restricted share awards	0	0
Net cash used in financing activities	9	42
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	0	0
Increase (decrease) in cash, cash equivalents and restricted cash	(1)	1
Cash, cash equivalents and restricted cash	0	2	1	1
Other Payments to Acquire Businesses		(5)
Reportable Legal Entities | Subsidiary Guarantors
Repayments of Unsecured Debt	0
Net cash provided by (used in) operating activities from continuing operations	0	0
Net cash used in operating activities from discontinued operations	0	0
Net cash provided by operating activities	0	0
Capital expenditures	0	0
Proceeds from sale of property / investments	0	0
Cost of business acquisitions, net of cash acquired	0
Cost of technology investments	0
Settlement of derivatives	0
Loans to affiliates	0	0
Proceeds from (Repayments of) Related Party Debt	0
Net cash used in investing activities	0	0
Net proceeds (repayments) under other short-term debt agreements	0	0
Proceeds from issuance of senior notes, net of issuance costs	0
Proceeds from borrowings from affiliates	0	0
Payments on borrowings from affiliates	0
Repurchase of ordinary shares	0	0
Distribution of cash dividends	0	0
Taxes withheld and paid on employees' restricted share awards	0	0
Net cash used in financing activities	0	0
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	0	0
Increase (decrease) in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash	0	0	0	0
Other Payments to Acquire Businesses		0
Reportable Legal Entities | Subsidiary Issuer/Guarantor
Repayments of Unsecured Debt	0
Net cash provided by (used in) operating activities from continuing operations	0	0
Net cash used in operating activities from discontinued operations	0	0
Net cash provided by operating activities	0	0
Capital expenditures	0	0
Proceeds from sale of property / investments	0	0
Cost of business acquisitions, net of cash acquired	0
Cost of technology investments	0
Settlement of derivatives	0
Loans to affiliates	0	0
Proceeds from (Repayments of) Related Party Debt	0
Net cash used in investing activities	0	0
Net proceeds (repayments) under other short-term debt agreements	175	0
Proceeds from issuance of senior notes, net of issuance costs	0
Proceeds from borrowings from affiliates	0	0
Payments on borrowings from affiliates	(175)
Repurchase of ordinary shares	0	0
Distribution of cash dividends	0	0
Taxes withheld and paid on employees' restricted share awards	0	0
Net cash used in financing activities	0	0
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	0	0
Increase (decrease) in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash	0	0	0	0
Other Payments to Acquire Businesses		0
Reportable Legal Entities | Non-Guarantor Subsidiaries
Repayments of Unsecured Debt	0
Net cash provided by (used in) operating activities from continuing operations	94	222
Net cash used in operating activities from discontinued operations	0	(31)
Net cash provided by operating activities	94	191
Capital expenditures	(235)	(243)
Proceeds from sale of property / investments	(3)	(3)
Cost of business acquisitions, net of cash acquired	2
Cost of technology investments	(3)
Settlement of derivatives	2
Loans to affiliates	(303)	(250)
Proceeds from (Repayments of) Related Party Debt	175
Net cash used in investing activities	(363)	(490)
Net proceeds (repayments) under other short-term debt agreements	54	35
Proceeds from issuance of senior notes, net of issuance costs	0
Proceeds from borrowings from affiliates	0	0
Payments on borrowings from affiliates	0
Repurchase of ordinary shares	0	0
Distribution of cash dividends	0	0
Taxes withheld and paid on employees' restricted share awards	(34)	(32)
Net cash used in financing activities	20	3
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	4	44
Increase (decrease) in cash, cash equivalents and restricted cash	(245)	(252)
Cash, cash equivalents and restricted cash	322	1,344	567	1,596
Other Payments to Acquire Businesses		0
Eliminations
Repayments of Unsecured Debt	0
Net cash provided by (used in) operating activities from continuing operations	0	0
Net cash used in operating activities from discontinued operations	0	0
Net cash provided by operating activities	0	0
Capital expenditures	0	0
Proceeds from sale of property / investments	0	0
Cost of business acquisitions, net of cash acquired	0
Cost of technology investments	0
Settlement of derivatives	0
Loans to affiliates	303	250
Proceeds from (Repayments of) Related Party Debt	(175)
Net cash used in investing activities	128	250
Net proceeds (repayments) under other short-term debt agreements	0	0
Proceeds from issuance of senior notes, net of issuance costs	0
Proceeds from borrowings from affiliates	(303)	(250)
Payments on borrowings from affiliates	175
Repurchase of ordinary shares	0	0
Distribution of cash dividends	0	0
Taxes withheld and paid on employees' restricted share awards	0	0
Net cash used in financing activities	(128)	(250)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	0	0
Increase (decrease) in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash	$ 0	0	$ 0	$ 0
Other Payments to Acquire Businesses		$ 0

Segment Reporting Reconciliatio

Segment Reporting Reconciliation of Sales and Operating Data (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net sales		$ 3,575	$ 3,630
Depreciation and amortization		173	155
Adjusted operating income		345	427
Operating income		297	374
Equity income, net of tax		3	5
Net income attributable to noncontrolling interest		5	9
Operating Segments | Signal and Power Solutions
Segment Reporting Information [Line Items]
Net sales		2,562	2,617
Depreciation and amortization		131	119
Adjusted operating income		283	351
Operating income		257	322
Equity income, net of tax		3	5
Net income attributable to noncontrolling interest		5	9
Operating Segments | Advanced Safety and User Experience
Segment Reporting Information [Line Items]
Net sales		1,023	1,032
Depreciation and amortization		42	36
Adjusted operating income		62	76
Operating income		40	52
Equity income, net of tax		0	0
Net income attributable to noncontrolling interest		0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net sales	[1]	(10)	(19)
Depreciation and amortization	[1]	0	0
Adjusted operating income	[1]	0	0
Operating income	[1]	0	0
Equity income, net of tax	[1]	0	0
Net income attributable to noncontrolling interest	[1]	$ 0	$ 0
[1]	Eliminations and Other includes the elimination of inter-segment transactions.

Segment Reporting Reconciliat_2

Segment Reporting Reconciliation of Adjusted OI to Net Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Reconciliation of Segment Adjusted OI to Consolidated Net Income
Adjusted operating income		$ 345	$ 427
Restructuring		(26)	(20)
Other acquisition and portfolio project costs		(11)	(19)
Deferred compensation related to nutonomy acquisition		(11)	(14)
Operating income		297	374
Interest expense		(38)	(34)
Other (expense) income, net		16	30
Income before income taxes and equity income		275	370
Income tax expense		(33)	(59)
Equity income, net of tax		3	5
Net income		245	316
Net income attributable to noncontrolling interest		5	9
Net income attributable to Aptiv		240	307
Signal and Power Solutions
Reconciliation of Segment Adjusted OI to Consolidated Net Income
Restructuring		(19)	(18)
Advanced Safety and User Experience
Reconciliation of Segment Adjusted OI to Consolidated Net Income
Restructuring		(7)	(2)
Operating Segments | Signal and Power Solutions
Reconciliation of Segment Adjusted OI to Consolidated Net Income
Adjusted operating income		283	351
Restructuring		(19)	(18)
Other acquisition and portfolio project costs		(7)	(11)
Deferred compensation related to nutonomy acquisition		0	0
Operating income		257	322
Equity income, net of tax		3	5
Operating Segments | Advanced Safety and User Experience
Reconciliation of Segment Adjusted OI to Consolidated Net Income
Adjusted operating income		62	76
Restructuring		(7)	(2)
Other acquisition and portfolio project costs		(4)	(8)
Deferred compensation related to nutonomy acquisition		(11)	(14)
Operating income		40	52
Equity income, net of tax		0	0
Intersegment Eliminations
Reconciliation of Segment Adjusted OI to Consolidated Net Income
Adjusted operating income	[1]	0	0
Restructuring		0	0
Other acquisition and portfolio project costs		0	0
Deferred compensation related to nutonomy acquisition		0	0
Operating income	[1]	0	0
Equity income, net of tax	[1]	$ 0	$ 0
[1]	Eliminations and Other includes the elimination of inter-segment transactions.

Revenue Disaggregation of Reven

Revenue Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales		$ 3,575	$ 3,630
North America
Disaggregation of Revenue [Line Items]
Net sales		1,421	1,351
Europe, Middle East & Africa
Disaggregation of Revenue [Line Items]
Net sales		1,229	1,269
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales		870	936
South America
Disaggregation of Revenue [Line Items]
Net sales		55	74
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Net sales	[1]	(10)	(19)
Intersegment Eliminations | North America
Disaggregation of Revenue [Line Items]
Net sales		(1)	(4)
Intersegment Eliminations | Europe, Middle East & Africa
Disaggregation of Revenue [Line Items]
Net sales		(3)	(5)
Intersegment Eliminations | Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales		(6)	(10)
Intersegment Eliminations | South America
Disaggregation of Revenue [Line Items]
Net sales		0	0
Advanced Safety and User Experience | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales		1,023	1,032
Advanced Safety and User Experience | Operating Segments | North America
Disaggregation of Revenue [Line Items]
Net sales		326	335
Advanced Safety and User Experience | Operating Segments | Europe, Middle East & Africa
Disaggregation of Revenue [Line Items]
Net sales		443	437
Advanced Safety and User Experience | Operating Segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales		254	259
Advanced Safety and User Experience | Operating Segments | South America
Disaggregation of Revenue [Line Items]
Net sales		0	1
Signal and Power Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Net sales		2,562	2,617
Signal and Power Solutions | Operating Segments | North America
Disaggregation of Revenue [Line Items]
Net sales		1,096	1,020
Signal and Power Solutions | Operating Segments | Europe, Middle East & Africa
Disaggregation of Revenue [Line Items]
Net sales		789	837
Signal and Power Solutions | Operating Segments | Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales		622	687
Signal and Power Solutions | Operating Segments | South America
Disaggregation of Revenue [Line Items]
Net sales		$ 55	$ 73
[1]	Eliminations and Other includes the elimination of inter-segment transactions.

Revenue Costs to Obtain a Contr

Revenue Costs to Obtain a Contract (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Capitalized upfront fees	$ 82		$ 72
Capitalized upfront fees	15		8
Capitalized upfront fees	67		$ 64
Capitalized upfront fees, amortization	$ 3	$ 1

Leases Lease - Additional Infor

Leases Lease - Additional Information (Details)	Mar. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	7 years
Finance Lease, Weighted Average Remaining Lease Term	7 years

Leases Lease Cost (Details)

Leases Lease Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Lease, Cost [Abstract]
Lease Income	$ 5
Finance Lease, Right-of-Use Asset, Amortization	1
Finance Lease, Interest Expense	0
Finance Lease Cost	1
Operating Lease, Cost	29
Short-term Lease, Cost	1
Variable Lease, Cost	1
Sublease Income	0
Lease, Cost	$ 32

Leases Supplemental Cash Flow I

Leases Supplemental Cash Flow Information Related to Leases (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Supplemental Cash Flow Information Related to Leases [Abstract]
Finance Lease, Interest Payment on Liability	$ 0
Operating Lease, Payments	27
Finance Lease, Principal Payments	1
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	36
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 0

Leases Supplemental Balance She

Leases Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Supplemental Balance Sheet Information Related to Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 434	$ 0
Operating lease liabilities	93	0
Operating Lease, Liability, Noncurrent	350	$ 0
Operating Lease, Liability	443
Property, Plant and Equipment, Gross	22
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(5)
Finance Lease, Right-of-Use Asset	17
Finance Lease, Liability, Current	2
Finance Lease, Liability, Noncurrent	16
Finance Lease, Liability	$ 18
Operating Lease, Weighted Average Remaining Lease Term	7 years
Finance Lease, Weighted Average Remaining Lease Term	7 years
Operating Lease, Weighted Average Discount Rate, Percent	3.50%
Finance Lease, Weighted Average Discount Rate, Percent	5.50%

Leases Maturities of Lease Liab

Leases Maturities of Lease Liabilities (Details) $ in Millions	Mar. 31, 2019USD ($)
Maturities of Lease Liabilities [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 80
Lessee, Operating Lease, Liability, Payments, Due Year Two	96
Lessee, Operating Lease, Liability, Payments, Due Year Three	83
Lessee, Operating Lease, Liability, Payments, Due Year Four	69
Lessee, Operating Lease, Liability, Payments, Due Year Five	51
Lessee, Operating Lease, Liability, Payments, Due after Year Five	120
Lessee, Operating Lease, Liability, Payments, Due	499
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	56
Operating Lease, Liability	443
Finance Lease, Liability, Payments, Remainder of Fiscal Year	3
Finance Lease, Liability, Payments, Due Year Two	4
Finance Lease, Liability, Payments, Due Year Three	4
Finance Lease, Liability, Payments, Due Year Four	3
Finance Lease, Liability, Payments, Due Year Five	3
Finance Lease, Liability, Payments, Due after Year Five	7
Finance Lease, Liability, Payments, Due	24
Finance Lease, Liability, Undiscounted Excess Amount	6
Finance Lease, Liability	$ 18