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Cover Page - USD ($) $ in Billions	12 Months Ended
Cover Page - USD ($) $ in Billions	Dec. 31, 2023	Feb. 19, 2024	Jun. 30, 2023
Document Information [Line Items]
Document Type	10-K
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	001-32641
Entity Registrant Name	BROOKDALE SENIOR LIVING INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-3068069
Entity Address, Address Line One	111 Westwood Place,
Entity Address, Address Line Two	Suite 400,
Entity Address, City or Town	Brentwood,
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37027
City Area Code	(615)
Local Phone Number	221-2250
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 0.8
Entity Common Stock, Shares Outstanding		189,339,428
Documents Incorporated by Reference	Certain sections of the registrant's Definitive Proxy Statement relating to its 2024 Annual Meeting of Stockholders to be filed with the SEC within 120 days of December 31, 2023, are incorporated by reference into Part III of this Annual Report on Form 10-K.
Entity Central Index Key	0001332349
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 Par Value Per Share
Trading Symbol	BKD
Security Exchange Name	NYSE
Incremental shares issuable under purchase contracts
Document Information [Line Items]
Title of 12(b) Security	7.00% Tangible Equity Units
Trading Symbol	BKDT
Security Exchange Name	NYSE