Other Assets and Intangibles, net - Summary of Amortization Expense Related to the Intangibles, Excluding Above and Below-Market Leases (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intangible Assets Net Excluding Goodwill [Abstract]
Amortization expense	$ 15.8	$ 17.7	$ 34.2