Chapter 11 Filing, Going Concern and Other Related Matters Uniti Arrangement (Details) - Subsequent Event - Uniti [Member] $ in Millions	Mar. 02, 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, Period To Pay Amounts Funded For Capital Improvements	5 years
Bankruptcy Settlement, Annual Interest Rate	9.00%
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 To Fund Capital Improvements	$ 432.0
Bankruptcy Settlement, Amount Funded To Purchase Assets	40.0
Bankruptcy Settlement, Amount Funded From Proceeds Of Common Stock	244.5
Maximum
Reorganization Items [Line Items]
Bankruptcy Settlement, Quarterly Amounts Payable To Fund Capital Improvements	$ 490.0