Summary of Significant Accounting Policies - Schedule of Gain on Sale of Real Estate (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Contributions to unconsolidated entities
Gross proceeds			$ 30.0	$ 27.0
Gain (loss) on sale of real estate, net			22.6	(1.5)
Dispositions to third parties
Gross proceeds		$ 650.3	395.4	333.4
Gain on sale of real estate, net	[1]	211.9	197.0	120.1
Total gains on contributions and dispositions, net		$ 211.9	$ 219.6	$ 118.6

[1] Excludes gain of $2.1 million for the year ended December 31, 2021, related to the revaluation of Cockeysville JV to adjust the gain from $12.5 million to $14.6 million and loss of $30.0 million for the year ended December 31, 2020, related to the revaluation of Mark 302 JV to adjust the gain from $38.8 million to $8.8 million as further described in Note 4 below.