Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Jul. 29, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-38352
Entity Registrant Name	ADT Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-4116383
Entity Address, Address Line One	1501 Yamato Road
Entity Address, City or Town	Boca Raton
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33431
City Area Code	561
Local Phone Number	988-3600
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	ADT
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 Central Index Key	0001703056
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		856,732,127
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		54,744,525