Other Financial Data - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 30, 2019	Mar. 31, 2018
Basic earnings (loss) per common share:
Earnings	$ 151	$ 117
Weighted average common shares outstanding (in shares)	164.0	161.4
Basic earnings per share amount (in US$ per share)	$ 0.92	$ 0.73
Diluted earnings per common share:
Earnings	$ 151	$ 117
Weighted average common shares outstanding (in shares)	164.0	161.4
Add effect of dilutive securities:
Share-based awards (in shares)	4.9	4.2
Senior Convertible Notes (in shares)	5.7	5.0
Diluted weighted average common shares outstanding (in shares)	174.6	170.6
Per share amount (in US$ per share)	$ 0.86	$ 0.69

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