Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of revenue
Revenue from contracts with customers	$ 261,899	$ 297,141	$ 795,550	$ 905,942
Operating lease income	46,622	30,356	101,945	95,688
Total operating revenues	308,521	327,497	897,495	1,001,630
Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	255,149	274,733	775,395	841,779
Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	181,752	185,717	549,017	557,628
Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	34,066	36,304	103,317	110,190
Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	38,368	39,697	122,252	125,157
Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	963	13,015	809	48,804
Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	6,750	22,408	20,155	64,163
Array
Disaggregation of revenue
Revenue from contracts with customers	1,281	70	2,969	254
Operating lease income	45,838	25,669	99,663	76,591
Total operating revenues	47,119	25,739	102,632	76,845
Array \| Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	1,281	70	2,969	254
Array \| Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Array \| Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Array \| Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Array \| Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	1,281	70	2,969	254
Array \| Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
TDS Telecom
Disaggregation of revenue
Revenue from contracts with customers	254,327	261,920	775,121	793,562
Operating lease income	784	742	2,282	3,000
Total operating revenues	255,111	262,662	777,403	796,562
TDS Telecom \| Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	254,186	261,718	774,586	792,975
TDS Telecom \| Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	181,752	185,717	549,017	557,628
TDS Telecom \| Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	34,066	36,304	103,317	110,190
TDS Telecom \| Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	38,368	39,697	122,252	125,157
TDS Telecom \| Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
TDS Telecom \| Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	141	202	535	587
Corporate, Eliminations and Other
Disaggregation of revenue
Revenue from contracts with customers	6,291	35,151	17,460	112,126
Operating lease income	0	3,945	0	16,097
Total operating revenues	6,291	39,096	17,460	128,223
Corporate, Eliminations and Other \| Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	(318)	12,945	(2,160)	48,550
Corporate, Eliminations and Other \| Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Corporate, Eliminations and Other \| Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Corporate, Eliminations and Other \| Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Corporate, Eliminations and Other \| Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	(318)	12,945	(2,160)	48,550
Corporate, Eliminations and Other \| Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	$ 6,609	$ 22,206	$ 19,620	$ 63,576