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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Acquisitions and Divestitures (Details) - USD ($) $ in Millions							3 Months Ended			9 Months Ended
	Jul. 08, 2019	Jul. 02, 2019	May 17, 2019	Apr. 01, 2019	Aug. 24, 2018	May 29, 2018	Dec. 31, 2019	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Business Acquisition [Line Items]
Research and development								$ 44.0	$ 43.7	$ 128.0	$ 174.0
Net proceeds from sale of business	$ 185.0									183.4	$ 0.0
Pre-tax gain on sale of business										$ 72.4
Consumer Healthcare Americas \| Merck Sharp & Dohme License Agreement
Business Acquisition [Line Items]
Research and development						$ 50.0
Developed Product Technology \| Generic Product Acquisition
Business Acquisition [Line Items]
Payments to acquire intangible assets		$ 49.0	$ 15.7		$ 30.4
Useful life of intangible assets		20 years	20 years		20 years
Developed Product Technology \| Budesonide Nasal Spray and Triamcinolone Nasal Spray
Business Acquisition [Line Items]
Payments to acquire intangible assets				$ 14.0
Useful life of intangible assets				10 years
Income from sales owned by company (percent)				100.00%
Maximum
Business Acquisition [Line Items]
Pre-tax gain on sale of business	$ 72.4
Forecast \| Minimum \| Brand \| Branded OTC Rights of Prevacid
Business Acquisition [Line Items]
Payments to acquire intangible assets							$ 61.5
Forecast \| Maximum \| Brand \| Branded OTC Rights of Prevacid
Business Acquisition [Line Items]
Payments to acquire intangible assets							$ 65.0