Leases - Lease Payments to be Received under Non-Cancellable Operating Leases (Parenthetical) (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Lessee Lease Description [Line Items]
Total future minimum lease payments to be received	$ 7,204,438	[1]
Windstream
Lessee Lease Description [Line Items]
Total future minimum lease payments to be received	$ 6,200,000

[1] Total future minimum lease payments to be received include $6.2 billion relating to the Windstream Leases.