Homebuilding Senior Notes and Other Debts Payable (Credit Facility) (Details) - Unsecured revolving credit facility - Homebuilding	Feb. 28, 2023 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 2,575,000,000
Accordion feature	425,000,000
Maximum borrowing capacity after accordion feature	3,000,000,000
Commitment - maturing in April 2024
Line of Credit Facility [Line Items]
Maximum borrowing capacity	350,000,000
Commitment - maturing in May 2027
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 2,225,000,000

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant