v3.26.1
Changes in Accumulated Other Comprehensive Income AOCI Reclassifications (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Cost of sales $ 4,166 $ 3,905
Income Tax Expense (Benefit) (81) (356)
Net income 191 (11)
Net income attributable to noncontrolling interest (3) (1)
Net income attributable to Aptiv 189 (11)
Amount Reclassified from Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net income attributable to Aptiv 36 (1)
Amount Reclassified from Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income before income taxes 42 (4)
Income Tax Expense (Benefit) (6) 3
Net income 36 (1)
Net income attributable to noncontrolling interest 0 0
Net income attributable to Aptiv 36 (1)
Amount Reclassified from Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Commodity derivatives    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Cost of sales 25 4
Amount Reclassified from Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Foreign currency derivatives    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Cost of sales $ 17 $ (8)