Other Assets, net - Summary of Amortization Expense Related to the Intangibles, Excluding Above and Below-Market Leases (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible Assets Net Excluding Goodwill [Abstract]
Amortization expense	$ 17.7	$ 34.2	$ 60.7