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Consolidated Statements Of Comprehensive Income - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement of Comprehensive Income [Abstract]                      
Net income $ 257 $ 231 $ 303 $ 316 $ 277 $ 413 $ 386 $ 352 $ 1,107 $ 1,428 $ 1,326
Other comprehensive (loss) income:                      
Currency translation adjustments                 (194) 315 (147)
Net change in unrecognized gain (loss) on derivative instruments, net of tax (Note 17)                 (39) 15 95
Employee benefit plans adjustment, net of tax (Note 12)                 2 11 (139)
Other comprehensive income (loss)                 (231) 341 (191)
Comprehensive income                 876 1,769 1,135
Comprehensive income attributable to noncontrolling interests                 32 83 60
Comprehensive income attributable to Aptiv                 $ 844 $ 1,686 $ 1,075