Summary of Significant Accounting Policies - Compensation Expense and Related Tax Benefit for Equity Based Payments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	$ 33	$ 20	$ 13
Income tax benefit	11	7	5
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	3	1	1
Selling and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	8	4	2
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	8	3	2
General and administration
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation expense	$ 14	$ 12	$ 8