Acquisition, Discontinued Operations, Equity-Method Investment and Collaborative Arrangement - Equity Method Investment Narrative (Details) € in Millions, £ in Millions, $ in Millions		1 Months Ended		3 Months Ended		6 Months Ended
		Jul. 31, 2022 USD ($)	Jul. 31, 2022 GBP (£)	Jul. 03, 2022 USD ($)	Jul. 04, 2021 USD ($)	Jul. 03, 2022 USD ($)	Jul. 04, 2021 USD ($)	Jul. 18, 2022	Jul. 03, 2022 GBP (£)	Mar. 31, 2022 USD ($)	Mar. 31, 2022 EUR (€)	Mar. 31, 2022 GBP (£)	Dec. 31, 2021 USD ($)	Jul. 31, 2019
Schedule of Equity Method Investments [Line Items]
Equity-method investments				$ 14,799		$ 14,799							$ 16,472
Other short-term borrowings, principal amount	[1]			4,714		4,714							605
1.365% Consumer Healthcare JV Loan [Member] | Loans Payable [Member]
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount | £									£ 2,900
Other short-term borrowings, principal amount				$ 3,700		$ 3,700
Stated interest rate				1.365%		1.365%			1.365%
Consumer Healthcare JV [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage										32.00%	32.00%	32.00%		32.00%
Equity-method investments				$ 14,600		$ 14,600							$ 16,300
Decrease due to foreign currency translation						1,700
Dividend received						354
Equity method investment earnings				$ 150	$ 148	$ 335	$ 218
Consumer Healthcare JV [Member] | Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage								32.00%
Dividends received, return of capital		$ 4,200	£ 3,500
GSK [Member] | Consumer Healthcare JV [Member] | Disposed of by Sale [Member]
Schedule of Equity Method Investments [Line Items]
Proposed percent of ownership disposal										80.00%	80.00%	80.00%
GSK [Member] | Consumer Healthcare JV [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage														68.00%
Consumer Healthcare JV [Member] | Senior Notes [Member] | Senior Notes, USD Denominated [Member]
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount										$ 8,750
Consumer Healthcare JV [Member] | Senior Notes [Member] | Senior Notes, EUR Denominated [Member]
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount | €											€ 2,350
Consumer Healthcare JV [Member] | Senior Notes [Member] | Senior Notes, GBP Denominated [Member]
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount | £												£ 700

[1] As of July 3, 2022, primarily includes $3.7 billion related to the Consumer Healthcare JV loan (see Note 2C), and cash collateral (see Note 7F). As of December 31, 2021, primarily includes cash collateral. See Note 7F.