Schedule I – Condensed Financial Information of The Registrant (Parent Company) - Condensed Balance Sheets (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Assets:
Cash and cash equivalents	$ 53.5	$ 155.6
Total current assets	831.0	269.6
Total assets	12,036.7	5,282.1
Liabilities:
Other current liabilities	389.4	118.9
Total current liabilities	1,123.9	380.7
Notes and other debt, net	9,529.4	5,783.6
Deferred income tax liabilities, net	17.7	0.0
Total liabilities	11,656.3	7,734.0
Shareholders' equity (deficit):
Common stock, $0.0001 par value, 5,550.0 million shares authorized, 239.0 million shares issued and outstanding at December 31, 2025 and 500.0 million shares authorized, 143.2 million shares issued and outstanding at December 31, 2024	0.0	0.0
Additional paid-in capital	2,790.1	1,236.0
Accumulated other comprehensive loss	(1.9)	(0.6)
Distributions in excess of accumulated earnings	(2,407.9)	(3,687.8)
Total Uniti shareholders' equity (deficit)	380.3	(2,452.4)
Total liabilities and shareholders' equity	$ 12,036.7	$ 5,282.1
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	5,550,000,000	500,000,000.0
Common stock, shares issued (in shares)	234,000,000.0	143,200,000
Common stock, shares outstanding (in shares)	234,000,000.0	143,200,000
New Uniti Preferred Stock
Shareholders' equity (deficit):
Preferred stock issued	$ 0.0	$ 0.0
Preferred stock, par value (in dollars per share)	$ 0.0001
Preferred stock, shares issued (in shares)	600,000
Preferred stock, shares outstanding (in shares)	600,000
Old Uniti Preferred Stock
Shareholders' equity (deficit):
Preferred stock issued	$ 0.0	$ 0.0
Preferred stock, par value (in dollars per share)		$ 0.0001
Preferred stock, shares issued (in shares)		0
Preferred stock, shares authorized (in shares)		50,000,000.0
Preferred stock, shares outstanding (in shares)		0
Uniti Group Inc.
Assets:
Cash and cash equivalents	0.0	$ 0.9
Total current assets	0.0	0.9
Investment in consolidated subsidiaries	393.6	0.0
Total assets	393.6	0.9
Liabilities:
Accrued taxes	6.2	6.5
Other current liabilities	3.7	0.7
Total current liabilities	9.9	7.2
Notes and other debt, net	0.0	300.2
Deferred income tax liabilities, net	3.4	0.0
Cash distributions and losses in excess of investments in consolidated subsidiaries	0.0	2,145.9
Total liabilities	13.3	2,453.3
Shareholders' equity (deficit):
Common stock, $0.0001 par value, 5,550.0 million shares authorized, 239.0 million shares issued and outstanding at December 31, 2025 and 500.0 million shares authorized, 143.2 million shares issued and outstanding at December 31, 2024	0.0	0.0
Additional paid-in capital	2,790.1	1,236.0
Accumulated other comprehensive loss	(1.9)	(0.6)
Distributions in excess of accumulated earnings	2,407.9	3,687.8
Total Uniti shareholders' equity (deficit)	380.3	(2,452.4)
Total liabilities and shareholders' equity	$ 393.6	$ 0.9
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	5,550,000,000	500,000,000.0
Common stock, shares issued (in shares)	234,000,000.0	143,200,000
Common stock, shares outstanding (in shares)	234,000,000.0	143,200,000
Uniti Group Inc. | New Uniti Preferred Stock
Shareholders' equity (deficit):
Preferred stock issued	$ 0.0	$ 0.0
Preferred stock, par value (in dollars per share)	$ 0.0001
Preferred stock, shares issued (in shares)	600,000
Preferred stock, shares outstanding (in shares)	600,000
Uniti Group Inc. | Old Uniti Preferred Stock
Shareholders' equity (deficit):
Preferred stock issued	$ 0.0	$ 0.0
Preferred stock, par value (in dollars per share)		$ 0.0001
Preferred stock, shares authorized (in shares)		50,000,000.0