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Accrued and Other Liabilities - Product Warranty and Related Liabilities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Product Warranty and Related Liabilities [Roll Forward]      
Warranty balance at beginning of period $ 7,590 $ 8,332 $ 9,069
Warranties issued and assumed in period – recall campaigns 745 665 678
Warranties issued and assumed in period – product warranty 2,001 2,143 2,123
Payments (3,012) (2,903) (3,129)
Adjustments to pre-existing warranties 455 (464) (495)
Effect of foreign currency and other 19 (183) 86
Warranty balance at end of period $ 7,798 $ 7,590 $ 8,332