Segments - Schedule of Capital Expenditures by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total	$ 214.9	$ 65.0	$ 461.2	$ 327.8
Operating Segments
Segment Reporting Information [Line Items]
Total	205.3	65.0	450.7	327.8
Corporate/shared operating expenses
Segment Reporting Information [Line Items]
Total	9.6	0.0	10.5	0.0
Kinetic | Operating Segments
Segment Reporting Information [Line Items]
Total	147.7	0.0	147.7	0.0
Uniti Solutions | Operating Segments
Segment Reporting Information [Line Items]
Total	4.9	0.0	4.9	0.0
Fiber Infrastructure | Operating Segments
Segment Reporting Information [Line Items]
Total	$ 52.7	$ 65.0	$ 298.1	$ 327.8