Share-Based Compensation Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions							3 Months Ended		9 Months Ended	12 Months Ended
	Apr. 23, 2020	Apr. 22, 2020	Apr. 25, 2019	Apr. 24, 2019	Apr. 26, 2018	Apr. 25, 2018	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number											1,608,000
Share-based Payment Arrangement, Expense							$ 4	$ 4
Share-based Payment Arrangement, Expense, after Tax							$ 4	4
Document Period End Date							Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized											7,500,000
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount							$ 34
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition							2 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number							2,611,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value							$ 28.39
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period							99,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value							$ 29.93
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value							$ 21.10				$ 26.48
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period							1,374,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value							$ 16.89
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period							272,000
PLC Long Term Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value							$ 23	$ 27	$ 16
Management [Member] | PLC Long Term Incentive Plan [Member] | 2020 Grant [Domain] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period							1,400,000
Management [Member] | PLC Long Term Incentive Plan [Member] | 2019 Grant [Member] [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period								1,000,000.0
Management [Member] | PLC Long Term Incentive Plan [Member] | 2018 Grant [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period									300,000
Employee and Non-employee members [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	197,902	68,018	70,924	33,944	34,756
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 2	$ 1	$ 2	$ 1		$ 2
Employee and Non-employee members [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value							$ 3
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date							10 years
Executive [Member] | Delphi Technologies PLC Long Term Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Target Performance, Percentage										200.00%