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Discontinued Operations Reconciliation of Major Classes of Profit or Loss of Discontinued Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Gain on divestiture of discontinued operations, net of tax $ 285      
Income from discontinued operations, net of tax 298 $ 27 $ 223 $ 42
Income from discontinued operations attributable to Delphi 295 22 216 32
Discontinued Operations, Held-for-sale or Disposed of by Sale | Thermal Systems        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net sales 382 389 755 768
Cost of sales 345 349 688 693
Selling, general and administrative 11 11 22 24
Amortization 0 2 1 4
Restructuring 1 1 2 2
Other income and (expense) items that are not major, net 0 0 0 1
Income from discontinued operations before income taxes and equity income 25 26 42 46
Income tax expense on discontinued operations (12) (6) (16) (12)
Equity income from discontinued operations, net of tax 0 7 0 8
Gain on divestiture of discontinued operations, net of tax 285 0 285 0
Impairment loss 0 0 (88) 0
Income from discontinued operations, net of tax 298 27 223 42
Income from discontinued operations attributable to noncontrolling interests 3 5 7 10
Income from discontinued operations attributable to Delphi 295 22 216 32
Income from discontinued operations before income taxes attributable to Delphi 307 27 231 42
Discontinued Operations, Held-for-sale or Disposed of by Sale | SDAAC | Thermal Systems        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income tax expense of discontinued operations attributable to noncontrolling interest $ 0 $ 1 $ 1 $ 2