Non-Recourse Property Debt and Credit Agreement - Non-Recourse Property Debt (Details) (Details) $ in Millions	Dec. 31, 2018 USD ($) community Property
Debt Instrument [Line Items]
Number of apartment homes \| community	6
Aimco Real Estate \| Fixed Rate Property Debt
Debt Instrument [Line Items]
Weighted average interest rate	4.22%
Aggregate gross book value \| $	$ 4,200.0
Aimco Real Estate \| Fixed Rate Property Debt \| Minimum
Debt Instrument [Line Items]
Interest rate	2.73%
Aimco Real Estate \| Fixed Rate Property Debt \| Maximum
Debt Instrument [Line Items]
Interest rate	7.14%
Aimco Real Estate \| Fixed Rate Property Debt \| Pledged as Collateral
Debt Instrument [Line Items]
Number of apartment homes \| Property	82
Aimco Real Estate \| Variable Rate Property Debt
Debt Instrument [Line Items]
Weighted average interest rate	3.61%
Aggregate gross book value \| $	$ 239.5
Aimco Real Estate \| Variable Rate Property Debt \| Minimum
Debt Instrument [Line Items]
Interest rate	3.55%
Aimco Real Estate \| Variable Rate Property Debt \| Maximum
Debt Instrument [Line Items]
Interest rate	3.67%
Aimco Real Estate \| Variable Rate Property Debt \| Pledged as Collateral
Debt Instrument [Line Items]
Number of apartment homes \| Property	8

Amount of assets pledged to secure a debt instrument.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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- Definition

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

+ References

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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&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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- Definition

Weighted average interest rate of debt outstanding.

+ References

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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- Details

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