Supplemental Financial Information - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($) shares	Sep. 30, 2018 USD ($) Reportable_Segments shares
Supplemental Financial Information [Line Items]
Number of reportable segments | Reportable_Segments		2
Treasury shares issued related to stock compensation | shares	1,279,482	10,308,301
Product Line Reorganization
Supplemental Financial Information [Line Items]
Restructuring charges, cumulative basis	$ 21	$ 21
Product Line Reorganization | Employee Severance
Supplemental Financial Information [Line Items]
Payments for restructuring	18	18
Manufacturing Facility in Greenock, Scotland
Supplemental Financial Information [Line Items]
Restructuring charges, cumulative basis	37	37
Estimated restructuring charges primarily severance and benefits cost	$ 40	$ 40