Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues					$ 1,149,831	$ 1,128,847	$ 1,100,522
Adjusted EBITDA					923,502	905,896	878,281
Interest expense, net					512,349	376,832	446,296
Depreciation and amortization					310,528	292,788	290,942
Other, net					20,893	(4,790)	24,917
Transaction related and other costs					12,611	10,340	7,544
Gain on sale of operations					0	(176)	(28,143)
Gain on sale of real estate					(2,164)	(433)	(442)
Goodwill impairment	$ 203,998			$ 203,998	203,998	240,500	0
Stock-based compensation					12,491	12,751	13,847
Income tax benefit	(56,130)			(62,899)	(68,474)	(17,365)	(4,916)
Adjustments for equity in earnings from unconsolidated entities					3,019	3,571	3,491
Net (loss) income	$ (118,896)			$ (112,469)	(81,749)	(8,122)	124,745
Capital expenditures					417,002	427,567	385,855
Corporate
Segment Reporting Information [Line Items]
Adjusted EBITDA					(21,778)	(25,492)	(24,232)
Depreciation and amortization					56	115	255
Capital expenditures					0	336	141
Uniti Leasing | Operating Segments
Segment Reporting Information [Line Items]
Revenues					852,772	827,457	801,497
Adjusted EBITDA					829,557	806,027	784,061
Depreciation and amortization					178,872	172,007	174,622
Capital expenditures					277,235	263,269	223,251
Uniti Fiber
Segment Reporting Information [Line Items]
Goodwill impairment		$ 24,500	$ 216,000
Uniti Fiber | Operating Segments
Segment Reporting Information [Line Items]
Revenues					297,059	301,390	299,025
Adjusted EBITDA					115,723	125,361	118,452
Depreciation and amortization					131,600	120,666	116,065
Capital expenditures					$ 139,767	$ 163,962	$ 162,463