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Goodwill and Other Intangibles, Net - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization expense of intangible assets	$ 24.4		$ 25.2	$ 73.4	$ 65.5
Estimated amortization expense, 2020	98.0			98.0
Cash proceeds for sale of business				7.0	0.0
Gain on sale of business				3.0	$ 0.0
Gross Carrying Amount	1,817.2			1,817.2		$ 1,822.4
Percent of fair value in excess of carrying value						26.00%
Average royalty rate						10.00%
Net book value	1,198.3			1,198.3		$ 1,274.3
U.S
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Fair value assumptions discount rate						9.50%
International
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Fair value assumptions discount rate						11.50%
Trade Names
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Gross Carrying Amount	1,021.0			1,021.0		$ 1,025.8
Net book value	766.1			766.1		806.1
Trojan Trade Name
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Gross Carrying Amount						$ 176.4
Trade Name and Other Intangible Assets
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net book value	23.0			$ 23.0
Remaining amortization period				12 years
PERL WEISS Toothpaste
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Goodwill		$ 1.3
Cash proceeds for sale of business		$ 7.0
Discontinued Operation, Name of Segment [Extensible List]		chd:ConsumerInternationalSegmentMember
PERL WEISS Toothpaste \| Selling General and Administrative Expenses
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Gain on sale of business		$ 3.0
PERL WEISS Toothpaste \| Trade Names
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net book value of trade name		$ 2.7
Maximum
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Estimated amortization expense, 2021	96.0			$ 96.0
Estimated amortization expense, 2022	96.0			96.0
Estimated amortization expense, 2023	96.0			96.0
Estimated amortization expense, 2024	96.0			96.0
Estimated amortization expense, 2025	96.0			96.0
Fair value assumptions growth rate						2.00%
Minimum
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Estimated amortization expense, 2021	88.0			88.0
Estimated amortization expense, 2022	88.0			88.0
Estimated amortization expense, 2023	88.0			88.0
Estimated amortization expense, 2024	88.0			88.0
Estimated amortization expense, 2025	$ 88.0			$ 88.0
Fair value assumptions growth rate						0.00%