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Commitments and Contingencies - Schedule of Product Warranty Reserves (Details) - Product Warranty - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]        
Balance at January 1 $ 268 $ 277    
Issuances/accruals during the period 329 218    
Settlements made during the period/other (208) (216)    
Balance at September 30 389 279    
Current portion     $ 262 $ 204
Non-current portion     127 75
Total $ 268 $ 277 $ 389 $ 279