Cover Document - shares	3 Months Ended
	Mar. 31, 2020	May 01, 2020
Document and Entity Information [Abstract]
Title of 12(b) Security	Ordinary shares. $0.01 par value per share
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Filer Category	Large Accelerated Filer
Entity Incorporation, State or Country Code	Y9
Document Transition Report	false
Document Quarterly Report	true
Document Type	10-Q
Document Fiscal Year Focus	2020
Document Period End Date	Mar. 31, 2020
Entity File Number	001-38110
Entity Registrant Name	DELPHI TECHNOLOGIES PLC
Entity Central Index Key	0001707092
Entity Tax Identification Number	98-1367514
Entity Address, Address Line One	One Angel Court
Entity Address, Address Line Two	10th Floor
Entity Address, City or Town	London
Entity Address, Postal Zip Code	EC2R 7HJ
Entity Address, Country	GB
City Area Code	011-
Local Phone Number	44-020-305-74300
Entity Information, Former Legal or Registered Name	N/A
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		86,349,731
Trading Symbol	DLPH
Security Exchange Name	NYSE