Financial Instruments - Investments - Unrealized Gains and Losses Related to Equity Securities (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Financial Instruments [Abstract]
Net gains recognized during the period on investments in equity securities	[1],[2]	$ (36)	$ (257)	$ (147)	$ (375)
Less: Net gains recognized during the period on equity securities sold during the period		(6)	(27)	(10)	(46)
Net unrealized gains during the reporting period on equity securities still held at the reporting date		$ (31)	$ (230)	$ (137)	$ (328)

[1] The second quarter of 2018 included gains of $142 million and the first six months of 2018 included gains of $203 million related to our investment in ICU Medical stock. For additional information, see Note 7B.

[2] The net gains on investments in equity securities are reported in Other (income)/deductions––net. For additional information, see Note 4.