Basis of Presentation and Summary of Significant Accounting Policies - Summary of Calculation of Weighted Average Shares used to Calculate Basic and Diluted Earnings Per Share (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Weighted average shares used to calculate basic and diluted earnings per share
Weighted average shares outstanding	147	147
Effect of potentially dilutive common shares from:
Convertible senior notes	1
Equity awards	1	1
Weighted average shares used in calculating diluted earnings per share	149	148
Potentially dilutive shares excluded from calculation due to anti-dilutive effect	1