Summary of Significant Accounting Policies - Schedule of Gain on Sale of Real Estate (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Dispositions to third parties
Gross proceeds	$ 163.4	$ 80.0	$ 172.3	$ 126.9
Gain on sale of real estate, net	$ 68.0	$ 18.1	$ 67.0	$ 42.3

Amount of difference between the carrying amount and the sales price of real estate properties sold as part of discontinued operations.

No definition available.

Name:	us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration