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Commitments and Contingencies - Schedule of Product Warranties (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 164 $ 74
Provisions 18 18
Expenditures (15) (26)
Other (1) 119 1
Ending balance $ 286 $ 67