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Consolidated Balance Sheets Parenthetical - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Common stock par value (in dollars per share) | $ 0.01 | $ 0.01
Automotive [Member] |  |
Allowance for doubtful accounts and notes receivable | $ 278 | $ 212

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