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, 2020	Mar. 31, 2019
Share Repurchases [Line Items]
Stock Repurchased and Retired During Period, Shares		737,917
Stock Repurchased Average Price		$ 20.33
Repurchase of ordinary shares		$ 15
Document Period End Date	Mar. 31, 2020
Numerator:
Net (loss) income attributable to Delphi Technologies	$ (57)	$ 16
Weighted Average Number of Shares Outstanding, Basic	86,170,000	88,450,000
Denominator:
Dilutive shares related to restricted stock units	110,000	100,000
Weighted Average Number of Shares Outstanding, Diluted	86,280,000	88,550,000
Basic net income per share:
Basic (in dollars per share)	$ (0.66)	$ 0.18
Diluted net income per share:
Diluted (in dollars per share)	$ (0.66)	$ 0.18
Antidilutive securities share impact	0	0
Share repurchase Program January [Member] [Domain]
Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount	$ 200