Segment Information - Operating Business Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Segment Reporting Information [Line Items]
Net sales	$ 1,868	$ 1,994	$ 5,141	$ 5,511
Operating Earnings by Segment
Operating earnings	352	413	828	991
Total other expense	(101)	(65)	(176)	(183)
Net earnings before income taxes	251	348	652	808
Products and Systems Integration
Segment Reporting Information [Line Items]
Net sales	1,163	1,349	3,124	3,656
Operating Earnings by Segment
Operating earnings	164	258	305	568
Software and Services
Segment Reporting Information [Line Items]
Net sales	705	645	2,017	1,855
Operating Earnings by Segment
Operating earnings	$ 188	$ 155	$ 523	$ 423