Merger and Purchase Price Allocation - Schedule of Merger Consideration (Details) - Windstream $ / shares in Units, $ in Millions	Aug. 01, 2025 USD ($) $ / shares shares
Business Combination, Consideration Transferred, Equity Interest [Line Items]
Merger Cash Consideration	$ 370.7
Settlement of preexisting relationships	499.1
Total merger consideration	$ 2,376.6
Risk free rate term structure and a credit risk adjusted spread percentage	4.50%
Maximum number of shares issued pursuant to warrants (in shares) | shares	17,558,406
Exercise price of warrants or rights (in dollars per share) | $ / shares	$ 8.13
Old Uniti
Business Combination, Consideration Transferred, Equity Interest [Line Items]
Share price (in dollars per share) | $ / shares	$ 8.14
Common Stock
Business Combination, Consideration Transferred, Equity Interest [Line Items]
Fair value of New Uniti Common Stock issued in the Merger	$ 733.7
Business combination, consideration transferred, equity interest, share issued (in shares) | shares	90,133,152
Preferred Stock
Business Combination, Consideration Transferred, Equity Interest [Line Items]
Fair value of New Uniti Common Stock issued in the Merger	$ 630.4
Business combination, consideration transferred, equity interest, share issued (in shares) | shares	575,000
Warrant
Business Combination, Consideration Transferred, Equity Interest [Line Items]
Fair value of New Uniti Common Stock issued in the Merger	$ 142.7