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Discontinued Operations (Details) - Discontinued Operations [Member] - Opel/Vauxhall Business [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales and revenue	$ 441	$ 561	$ 868	$ 1,168
Purchases and expenses	$ 213	$ 361	405	837
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash payments			616	994
Cash receipts			$ 1,057	$ 1,510

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Amount of expense in continuing operations related to continuing involvement in a discontinued operation after the disposal that before the disposal was eliminated as intra-entity transactions.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 4B
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Amount of revenue in continuing operations related to continuing involvement in a discontinued operation after disposal that before the disposal was eliminated as intra-entity transactions.

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