XML 15 R1.htm IDEA: XBRL DOCUMENT v3.20.4
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Feb. 22, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
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    
Title of 12(b) Security Common Stock, $0.01 Par Value Per Share    
Trading Symbol BKD    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
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 false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 545
Entity Common Stock, Shares Outstanding   183,461,665  
Entity Central Index Key 0001332349    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false