Other Financial Data - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Basic earnings (loss) per common share:
Earnings	$ 205	$ 267	$ 537	$ 625
Weighted average common shares outstanding (in shares)	169.7	166.7	170.1	165.3
Basic earnings per share amount (in USD per share)	$ 1.21	$ 1.60	$ 3.16	$ 3.78
Diluted earnings per common share:
Earnings	$ 205	$ 267	$ 537	$ 625
Weighted average common shares outstanding (in shares)	169.7	166.7	170.1	165.3
Add effect of dilutive securities:
Share-based awards (in shares)	3.8	4.8	4.2	4.7
Diluted weighted average common shares outstanding (in shares)	173.5	176.4	174.3	175.7
Per share amount (in USD per share)	$ 1.18	$ 1.51	$ 3.08	$ 3.56
2.00% senior convertible notes
Add effect of dilutive securities:
Senior convertible notes (in shares)	0.0	4.9	0.0	5.7
2.00% senior convertible notes | Convertible Notes
Add effect of dilutive securities:
Interest rate	2.00%		2.00%
1.75% senior convertible notes
Add effect of dilutive securities:
Senior convertible notes (in shares)	0.0	0.0	0.0	0.0
1.75% senior convertible notes | Convertible Notes
Add effect of dilutive securities:
Interest rate	1.75%		1.75%