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Equity In Net Assets Of Nonconsolidated Affiliates Transactions with NCAs (Details) - Nonconsolidated Affiliates [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transactions [Line Items]
Automotive sales and revenue	$ 923	$ 889	$ 1,745
Automotive purchases, net	674	803	7
Dividends received	2,000	2,120	2,047
Operating cash flows	2,321	2,512	$ 3,853
Accounts and notes receivable, net	780	807
Accounts payable	534	553
Undistributed earnings	$ 2,184	$ 2,172

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The net cash provided by (used in) operating activities resulting from transactions with related parties.

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For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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Carrying amount as of the balance sheet date of obligations due all related parties.

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Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees).

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