Acquisitions and Divestitures - Oral Care Assets of High Ridge Brands and Ranir Global Holdings,LLC Acquisitions (Details) - USD ($) $ in Millions				3 Months Ended	6 Months Ended		9 Months Ended
		Apr. 01, 2020	Jul. 01, 2019	Sep. 26, 2020	Sep. 26, 2020	Dec. 31, 2019	Sep. 26, 2020	Sep. 28, 2019
Business Acquisition [Line Items]
Cash consideration - net of cash acquired							$ 106.0	$ 749.5
Measurement period adjustment to goodwill							1.6
Estimated fair value of assets acquired and liabilities assumed:
Goodwill				$ 3,839.3	$ 3,839.3	$ 4,116.7	3,839.3
CSCA
Business Acquisition [Line Items]
Measurement period adjustment to goodwill							(10.4)
Estimated fair value of assets acquired and liabilities assumed:
Goodwill				1,898.8	1,898.8	1,899.1	1,898.8
CSCI
Business Acquisition [Line Items]
Measurement period adjustment to goodwill	[1]						12.0
Estimated fair value of assets acquired and liabilities assumed:
Goodwill	[1]			1,129.4	1,129.4	1,203.7	1,129.4
Oral Care Assets of High Ridge Brands (Dr. Fresh)
Business Acquisition [Line Items]
Cash consideration		$ 113.0			106.0
Prepayment of contract consideration for transitional services				2.0	2.0		2.0
Net sales since acquisition					44.4
Net income since acquisition					0.7
Estimated fair value of assets acquired and liabilities assumed:
Accounts receivable				13.1	13.1		13.1
Inventories				23.4	23.4		23.4
Prepaid expenses and other current assets				0.4	0.4		0.4
Property, plant and equipment, net				0.7	0.7		0.7
Operating lease assets				2.6	2.6		2.6
Goodwill				15.9	15.9		15.9
Definite-lived intangible assets				66.1	66.1		66.1
Total assets				122.2	122.2		122.2
Accounts payable				6.0	6.0		6.0
Other accrued liabilities				4.0	4.0		4.0
Payroll and related taxes				0.7	0.7		0.7
Accrued customer programs				3.0	3.0		3.0
Other non-current liabilities				2.5	2.5		2.5
Total liabilities				16.2	16.2		16.2
Net assets acquired				106.0	106.0		106.0
Useful life of intangible assets		17 years 9 months 18 days
Oral Care Assets of High Ridge Brands (Dr. Fresh) | CSCA
Business Acquisition [Line Items]
Inventory costs stepped up to acquisition date fair value					2.0
General transaction costs				0.1			4.2
Measurement period adjustment to intangibles				(0.7)
Measurement period adjustment to goodwill				(0.4)
Estimated fair value of assets acquired and liabilities assumed:
Goodwill		$ 14.1
Oral Care Assets of High Ridge Brands (Dr. Fresh) | CSCI
Estimated fair value of assets acquired and liabilities assumed:
Goodwill		$ 1.8
Oral Care Assets of High Ridge Brands (Dr. Fresh) | Distribution and License Agreements and Supply Agreements
Estimated fair value of assets acquired and liabilities assumed:
Definite-lived intangible assets				2.2	2.2		2.2
Oral Care Assets of High Ridge Brands (Dr. Fresh) | Developed product technology, formulations, and product rights
Estimated fair value of assets acquired and liabilities assumed:
Definite-lived intangible assets				0.1	0.1		0.1
Oral Care Assets of High Ridge Brands (Dr. Fresh) | Customer relationships and distribution networks
Estimated fair value of assets acquired and liabilities assumed:
Definite-lived intangible assets				20.6	20.6		20.6
Oral Care Assets of High Ridge Brands (Dr. Fresh) | Trademarks, trade names, and brands
Estimated fair value of assets acquired and liabilities assumed:
Definite-lived intangible assets				43.2	43.2		43.2
Ranir Global Holdings, LLC
Business Acquisition [Line Items]
Cash consideration			$ 759.2
Outstanding equity interest acquired (percent)			100.00%
Total base consideration			$ 750.0
Cash consideration - net of cash acquired			747.7
Net sales since acquisition						151.4
Net income since acquisition						7.6
Inventory costs stepped up to acquisition date fair value						$ 5.7
Estimated fair value of assets acquired and liabilities assumed:
Cash and cash equivalents			11.5
Accounts receivable			40.6
Inventories			59.0
Prepaid expenses and other current assets			4.0
Property, plant and equipment, net			40.8
Operating lease assets			3.7
Goodwill			292.7
Total intangible assets			389.3
Other non-current assets			2.8
Total assets			844.4
Accounts payable			17.6
Other accrued liabilities			7.7
Payroll and related taxes			5.5
Accrued customer programs			5.7
Deferred income taxes			45.9
Other non-current liabilities			2.8
Total liabilities			85.2
Net assets acquired			759.2
Ranir Global Holdings, LLC | CSCA
Estimated fair value of assets acquired and liabilities assumed:
Goodwill				212.6	212.6		212.6
Goodwill expected to be tax deductible				252.3	252.3		252.3
Ranir Global Holdings, LLC | CSCI
Estimated fair value of assets acquired and liabilities assumed:
Goodwill				$ 80.1	$ 80.1		$ 80.1
Ranir Global Holdings, LLC | In-process research and development
Estimated fair value of assets acquired and liabilities assumed:
Indefinite-lived intangibles			39.7
Ranir Global Holdings, LLC | Developed product technology, formulations, and product rights
Estimated fair value of assets acquired and liabilities assumed:
Definite-lived intangible assets			$ 48.6
Useful life of intangible assets			10 years
Ranir Global Holdings, LLC | Customer relationships and distribution networks
Estimated fair value of assets acquired and liabilities assumed:
Definite-lived intangible assets			$ 260.0
Useful life of intangible assets			24 years
Ranir Global Holdings, LLC | Trademarks, trade names, and brands
Estimated fair value of assets acquired and liabilities assumed:
Definite-lived intangible assets			$ 41.0
Minimum | Ranir Global Holdings, LLC | Trademarks, trade names, and brands
Estimated fair value of assets acquired and liabilities assumed:
Useful life of intangible assets			20 years
Maximum | Ranir Global Holdings, LLC | Trademarks, trade names, and brands
Estimated fair value of assets acquired and liabilities assumed:
Useful life of intangible assets			25 years

[1] We had accumulated goodwill impairments of $868.4 million as of each of December 31, 2019 and September 26, 2020.