Earnings Per Share - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net income attributable to shareholders	$ 1,608.9	$ 12.2	$ 1,610.4	$ 71.8
Less: Income allocated to participating securities	(35.4)	(0.3)	(41.3)	(1.5)
Preferred stock dividend	0.0		0.0
Less: Dividends declared on Preferred Stock	(9.9)	0.0	(9.9)	0.0
Net income attributable to common shareholders	$ 1,563.6	$ 11.9	$ 1,559.2	$ 70.3
Denominator:
Weighted-average common shares outstanding (in shares)	203.6	143.2	163.9	143.0
Weighted-average New Uniti Warrants outstanding (in shares)	11.6	0.0	3.9	0.0
Total basic weighted-average common shares outstanding (in shares)	215.2	143.2	167.8	143.0
Basic earnings per common share (in dollars per share)	$ 7.26	$ 0.08	$ 9.29	$ 0.49
Numerator:
Net income attributable to common shares	$ 1,563.6	$ 11.9	$ 1,559.2	$ 70.3
Add: Dividends declared on Preferred Stock	9.9	0.0	9.9	0.0
Add: Impact on if-converted dilutive securities	6.2	0.0	18.2	0.0
Net income attributable to common shares	$ 1,579.7	$ 11.9	$ 1,587.3	$ 70.3
Denominator:
Basic weighted-average common shares outstanding (in shares)	215.2	143.2	167.8	143.0
Add: Effect of dilutive non-participating securities (in shares)	80.4	0.0	26.9	0.0
Add: Impact on if-converted dilutive securities (in shares)	25.3	0.0	25.3	0.0
Total diluted weighted-average common shares outstanding (in shares)	320.9	143.2	220.0	143.0
Dilutive earnings per common share (in dollars per share)	$ 4.92	$ 0.08	$ 7.21	$ 0.49