Summary of Significant Accounting Policies - Compensation Expense and Related Tax Benefit for Equity Based Payments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting period for SARs (years)	2 years 2 months 12 days
Total compensation expense	$ 38	$ 28	$ 33
Income tax benefit	11	9	11
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	3	2	3
Selling and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	8	6	8
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	11	9	8
General and administration
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	$ 16	$ 11	$ 14
Maximum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting period for SARs (years)	4 years