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Debt - Non-Recourse Mortgages and Notes Payable (Details) - Non-recourse mortgages and notes payable - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Long-Term Debt
Outstanding principal balances per real estate development, low end of range	$ 3.1	$ 3.1
Outstanding principal balances per real estate development, high end of range	14.4	15.1
Real estate	$ 198.3	$ 194.1
Minimum
Long-Term Debt
Interest rate (as a percent)	3.50%	3.50%
Maximum
Long-Term Debt
Interest rate (as a percent)	4.80%	4.80%

X

- Definition

Represents the high end of the range of the outstanding principal balances of mortgages and other notes payable per real estate development.

+ References

No definition available.

+ Details

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X

- Definition

Represents the low end of the range of the outstanding principal balances of mortgages and other notes payable per real estate development.

+ References

No definition available.

+ Details

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X

- Definition

Investments in real estate held for investment purposes and held-for-sale.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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