DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Subscriber System Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Accounting Policies [Abstract]
Gross carrying amount	$ 7,051,746	$ 6,878,490
Accumulated depreciation	(4,136,851)	(3,897,329)
Subscriber system assets, net	$ 2,914,895	$ 2,981,161

Aggregate accumulated depreciation of long-lived security system assets.

No definition available.

Name:	adt_SubscriberSystemAssetsAccumulatedDepreciation
Namespace Prefix:	adt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant