REVENUE AND RECEIVABLES - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,601,030	$ 1,304,417	$ 3,145,777	$ 2,609,121
CSB
Disaggregation of Revenue [Line Items]
Total revenue	1,088,489	1,022,647	2,151,078	2,061,252
Commercial
Disaggregation of Revenue [Line Items]
Total revenue	297,486	281,770	587,663	547,869
Solar
Disaggregation of Revenue [Line Items]
Total revenue	215,055	0	407,036	0
Monitoring and related services
Disaggregation of Revenue [Line Items]
Total revenue	1,145,792	1,083,520	2,267,088	2,146,286
Monitoring and related services | CSB
Disaggregation of Revenue [Line Items]
Total revenue	1,011,442	965,233	2,004,470	1,916,481
Monitoring and related services | Commercial
Disaggregation of Revenue [Line Items]
Total revenue	134,350	118,287	262,618	229,805
Installation, product, and other
Disaggregation of Revenue [Line Items]
Total revenue	455,238	220,897	878,689	462,835
Installation, product, and other | CSB
Disaggregation of Revenue [Line Items]
Total revenue	77,047	57,414	146,608	144,771
Installation, product, and other | Commercial
Disaggregation of Revenue [Line Items]
Total revenue	163,136	163,483	325,045	318,064
Installation, product, and other | Solar
Disaggregation of Revenue [Line Items]
Total revenue	$ 215,055	$ 0	$ 407,036	$ 0