v3.22.1

Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2022	Apr. 30, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	1-37533
Entity Registrant Name	GCP Applied Technologies Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-3936076
Entity Address, Address Line One	2325 Lakeview Parkway
Entity Address, City or Town	Alpharetta
Entity Address, State or Province	GA
Entity Address, Postal Zip Code	30009
City Area Code	617
Local Phone Number	876-1400
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	GCP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		74,011,349
Entity Central Index Key	0001644440
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
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GCP Applied Technologies Inc. 10-Q