Acquisitions, Equity-Method Investment and Assets and Liabilities Held for Sale and Research and Development Arrangement - Equity Method Investments and Assets and Liabilities Held for Sale Narrative (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended
		Jul. 31, 2019	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Schedule of Equity Method Investments [Line Items]
(Gain) on completion of Consumer Healthcare JV transaction	[1]		$ (8,087)	$ 0	$ (8,087)	$ 0
GSK Consumer Healthcare [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		32.00%
(Gain) on completion of Consumer Healthcare JV transaction			(8,100)
Gain on joint venture formation, net of tax			$ 5,400
Tax indemnification liability		$ 45
Fair value of equity method investment		$ 15,700
Term of administrative services in accordance with transitional agreements		24 years
Term of manufacture and supply agreements in accordance with transitional agreement		6 years
GSK [Member] | GSK Consumer Healthcare [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		68.00%

[1] Amounts may not add due to rounding.