Warranty Obligations (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Accrual balance at beginning of period	$ 97
Provision for estimated warranties incurred during the period	17
Provision for changes in estimate for pre-existing warranties	6
Settlements made during the period (in cash or in kind)	(22)
Foreign currency translation and other	(3)
Accrual balance at end of period	95
Minimum [Member]
Product Warranty Liability [Line Items]
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate	0
Maximum [Member]
Product Warranty Liability [Line Items]
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate	$ 20