For an unclassified balance sheet, amounts due from an entity in which the reporting entity shares joint control with another party or group.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.4-08.(k)(1))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_DueFromJointVentures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Real Estate and Other Activities - Loans - Additional Information (Detail) € in Millions, £ in Millions, $ in Millions		6 Months Ended
	Jan. 19, 2021 GBP (£)	Jun. 30, 2021 USD ($)	Jun. 30, 2021 EUR (€)	Jan. 08, 2021 USD ($)
Primotop Holdings S.a.r.l. [Member]
Loans [Line Items]
Shareholder loan to joint venture \| €			€ 297
Waterland Private Equity Fund VII C.V. [Member]
Loans [Line Items]
Purchase price of acquisition with 364-day acquisition loan \| £	£ 250
Steward Health Care System LLC [Member]
Loans [Line Items]
Other loan				$ 335
Repayments of other loan		$ 75