| Cover Document | Aug. 05, 2020 |
| Cover [Abstract] | |
| Entity Central Index Key | 0001707092 |
| Title of 12(b) Security | Ordinary Shares. $0.01 par value per share |
| Trading Symbol | DLPH |
| Entity Incorporation, State or Country Code | Y9 |
| Document Type | 8-K |
| Document Period End Date | Aug. 5, 2020 |
| Entity Registrant Name | DELPHI TECHNOLOGIES PLC |
| Entity File Number | 001-38110 |
| 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 |
| Country Region | 44 |
| Local Phone Number | 020-305-74300 |
| Security Exchange Name | NYSE |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
