Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 29, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	CHD
Entity Registrant Name	CHURCH & DWIGHT CO INC /DE/
Entity Central Index Key	0000313927
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	1-10585
Entity Tax Identification Number	13-4996950
Entity Address, Address Line One	500 Charles Ewing Boulevard
Entity Address, City or Town	Ewing
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08628
City Area Code	609
Local Phone Number	806-1200
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock, $1 par value
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		245,401,975