Chapter 11 Filing, Going Concern and Other Related Matters Uniti Arrangement (Details) - Uniti [Member] $ in Millions	May 08, 2020 USD ($)
Reorganization Items [Line Items]
Bankruptcy Settlement, Maximum Amount to Fund Capital Improvements	$ 1,750.0
Bankruptcy Settlement, Quarterly Amounts Payable to Fund Capital Improvements	$ 400.0
Bankruptcy Settlement, Annual Interest Rate	9.00%
Bankruptcy Settlement, Amount Funded To Purchase Assets	$ 40.0
Bankruptcy Settlement, Amount Funded From Proceeds of Common Stock	$ 244.5
Bankruptcy Settlement, Percentage of Increase in Annual Base Rent After Capital Improvements	8.00%
Bankruptcy Settlement, Percentage of Increase in Annual Rent Escalator After Capital Improvements	0.50%
Minimum
Reorganization Items [Line Items]
Bankruptcy Settlement, Quarterly Amounts Payable Including Interest to Fund Capital Improvements	$ 432.0
Maximum
Reorganization Items [Line Items]
Bankruptcy Settlement, Quarterly Amounts Payable Including Interest to Fund Capital Improvements	$ 490.0