Income Taxes - Narrative (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate	$ 148.3
Tax basis of REIT assets in excess of balance sheet	2,200.0
Tax credit carryforward	7.2
Unrecognized tax benefits, interest and penalties accrued	13.6	$ 21.3	$ 14.2
Capital Loss Carryforward
Income Tax Contingency [Line Items]
Tax credit carryforward	8.0
Indemnification Agreement
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate	3.4
Indemnification Agreement | Metronode
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate	$ 32.0