SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Developments (Details) $ in Millions		9 Months Ended	12 Months Ended
	Sep. 13, 2020 USD ($) item	Sep. 30, 2022 USD ($) item	Dec. 31, 2021	Sep. 13, 2022 USD ($) item	Dec. 07, 2021 USD ($)
Disposed of by Sale
Discontinued operations, additional information
Number of Wireless Partnerships | item				5
Discontinued operation, consideration | $				$ 490.0
Investment Agreement
Discontinued operations, additional information
Number of passings across select service areas | item	1,600,000
Investment Agreement | Searchlight
Discontinued operations, additional information
Capital commitment | $					$ 75.0
Percentage of company stock on as converted basis		34.00%	35.00%
Upgrade period	5 years
Number of homes and small businesses for plan to upgrade | item		400,000
Investment Agreement | Searchlight | Subordinated Debt | Maximum
Discontinued operations, additional information
Capital commitment | $	$ 425.0	$ 425.0