v3.24.3

COVER PAGE - USD ($)	12 Months Ended
COVER PAGE - USD ($)	Dec. 31, 2023	Mar. 01, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39798
Entity Registrant Name	Altus Power, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-3448396
Entity Address, Address Line One	2200 Atlantic Street
Entity Address, Address Line Two	6th Floor
Entity Address, City or Town	Stamford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06902
City Area Code	203
Local Phone Number	698-0090
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	AMPS
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 393,193,278
Entity Common Stock, Shares Outstanding		159,081,159
Documents Incorporated by Reference	Portions of the registrant’s Definitive Proxy Statement to be filed for its 2024 Annual Meeting of Stockholders are incorporated by reference into the sections of this Form 10-K addressing the requirements of Part III of Form 10-K.
Entity Central Index Key	0001828723
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
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The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.

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Altus Power, Inc. 10-K/A