Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Non-development - reimbursable from lessor Non-development - Reimbursable [Member] Non-development - Reimbursable [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Weighted average interest rate (as percent) Long-Term Debt, Weighted Average Interest Rate, at Point in Time Entity File Number Entity File Number Additional paid-in-capital: Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Leases [Abstract] Noncash or Part Noncash Acquisitions [Table] Noncash or Part Noncash Acquisitions [Table] Shares withheld for employee taxes Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Measurement Basis [Axis] Measurement Basis [Axis] Weighted Average Grant Date Fair Value (in dollars per share) Share-Based Compensation, Shares, Value Per Share The grant date fair values for purposes of disclosing shares potentially issuable under restricted stock awards on all restricted stock plans and other required information pertaining to awards in the customized range. Basic net income (loss) per share attributable to Brookdale Senior Living Inc. common stockholders (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Trade accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Revenue Revenue from Contract with Customer [Text Block] Trade accounts payable Increase (Decrease) in Accounts Payable, Trade Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Restricted stock and restricted stock units, net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Schedule of Cash, Cash Equivalents, and Restricted Cash Schedule of Cash and Cash Equivalents [Table Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Revenue (as percent) Concentration Risk, Percentage Deferred financing costs, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Principles of Consolidation Consolidation, Policy [Policy Text Block] Non-cash stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Resident fees Health Care, Resident Service [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total Grant Date Fair Value Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Asset impairment Asset impairment Asset Impairment Charges Total Brookdale Senior Living Inc. stockholders' equity (deficit) Equity, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Non-cash stock-based compensation expense Share-Based Payment Arrangement, Expense Schedule of Net Property, Plant and Equipment and Leasehold Intangibles Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Shares issued for warrant exercise (in shares) Stock Issued During Period, Shares, New Issues Current assets Assets, Current [Abstract] Total liabilities and equity (deficit) Liabilities and Equity Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Liabilities and Equity (Deficit) Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Net (income) loss attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Capital expenditures: Segment, Expenditure, Addition to Long-Lived Assets Accounting Policies [Abstract] Accounting Policies [Abstract] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Unvested Restricted Stock Restricted Stock [Member] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Long-Term Debt, Capital and Financing Leases and Financing Obligations [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Grants of Restricted Stock Units and Stock Awards Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Treasury stock: Treasury Stock, Common [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Depreciation and amortization expense Depreciation And Amortization Expense For Plant And Equipment And Leasehold Intangibles The current period expense charged against earnings on long-lived, physical assets not used in production, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset. Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Other liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Schedule of Supplemental Cash Flow Information and Supplemental Schedule of Non-Cash Operating, Investing and Financing Activities Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Facility operating lease expense Facility operating lease expense Operating Lease, Facility Expense Operating Lease, Facility Expense Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Current portion of long-term debt Current portion Long-Term Debt, Current Maturities Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Name Measure Name Letter of Credit Letter of Credit [Member] Current portion of operating lease obligations Operating Lease, Liability, Current All Other Corporate And All Other [Member] The Company's management services segment includes communities owned by others and operated by the company pursuant to management agreements. Under the management agreements for these communities, the company receives management fees as well as reimbursed expenses, which represent the reimbursement of certain expenses it incurs on behalf of the owners. Class of Stock [Line Items] Class of Stock [Line Items] Deferred tax liability Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Furniture and equipment Furniture and Fixtures [Member] Award Type [Axis] Award Type [Axis] Total long-term debt Total long-term debt Long-Term Debt Other liabilities Increase (Decrease) In Other Liabilities Increase (Decrease) In Other Liabilities Total assets Assets Entity Trading Symbol Trading Symbol Government reimbursement Government Reimbursement [Member] Government Reimbursement [Member] Percentage of total debt (as percent) Debt Instrument, Percentage Of Total Debt Debt Instrument, Percentage Of Total Debt Entity Address, City or Town Entity Address, City or Town Operating lease expense adjustment Operating Lease Expense Adjustments Operating Lease Expense Adjustments Cash Flows from Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Warrants Warrant [Member] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Change in fair value of derivatives Change in fair value of derivatives Derivative, Gain (Loss) on Derivative, Net Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Number of shares issuable upon conversion (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Common stock, outstanding (in shares) Balance at beginning of period (in shares) Balances at end of period (in shares) Common Stock, Shares, Outstanding PEO PEO [Member] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Interest income Investment Income, Interest Increase in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Proceeds from sale of assets, net: Proceeds from sale of assets, net [Member] The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Accumulated deficit: Retained Earnings [Member] Prepaid expenses and other current assets, net Prepaid Expense and Other Assets, Current Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Benefit (provision) for income taxes Income Tax Expense (Benefit) Purchase of marketable securities Payments to Acquire Marketable Securities Repayment of debt and financing lease obligations Repayment of Long-Term Debt, Long-Term Lease Obligation, and Capital Security Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Number of senior living communities Number Of Senior Living Communities Number Of Senior Living Communities Debt Interest Expense, Debt, Excluding Amortization Net income (loss) Net income (loss) attributable to noncontrolling interest Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Acquisition of assets Payments to Acquire Other Productive Assets Other notes payable Notes Payable, Other Payables [Member] Financing leases, number of communities Financing Leases, Number Of Communities Financing Leases, Number Of Communities Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] CCRCs CCRCs Rental [Member] The Company's CCRCs - Rental segment includes large owned or leased communities that offer a variety of living arrangements and services to accommodate all levels of physical ability and health. Most of the Company's CCRCs have independent living, assisted living and skilled nursing available on one campus or within the immediate market, and some also include memory care/Alzheimer's units. Number of communities owned Number Of Communities Owned Number Of Communities Owned Accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization City Area Code City Area Code Net cash paid Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Buildings and improvements Building and Building Improvements [Member] Refundable fees and deferred revenue Refundable Fees And Deferred Revenue, Current Refundable Fees And Deferred Revenue, Current All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses Accrued Liabilities, Current Mortgages Mortgages [Member] Commitments and Contingencies Disclosure [Abstract] Unvested restricted shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Cash Flows from Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative expense (including non-cash stock-based compensation expense of $3,680 and $3,979, respectively) General and administrative expense (including non-cash stock-based compensation expense) General and Administrative Expense Letter of Credit Sublimit Letter of credit sublimit [Member] Letter of credit sublimit on the secured line of credit facility Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Property and casualty insurance proceeds Proceeds from Insurance Settlement, Investing Activities Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Reimbursed costs incurred on behalf of managed communities Reimbursement Costs, Managed Communities [Member] Reimbursement Costs, Managed Communities [Member] Assets under financing leases and leasehold improvements Assets Under Financing Leases And Leasehold Intangibles [Member] Assets Under Financing Leases and Leasehold Intangibles [Member] Non-cash impairment charges Tangible Asset Impairment Charges Assets held for sale Asset, Held-for-Sale, Not Part of Disposal Group, Current Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Convertible Debt Convertible Debt [Member] Description of Business Nature of Operations [Text Block] Operating lease assets and liabilities for lessor capital expenditure reimbursements Payments (Proceeds) For Lessor Capital Expenditure Impairment Payments (Proceeds) For Lessor Capital Expenditure Impairment Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Payment of financing costs, net of related payables Payments of Debt Issuance Costs Entity Address, State or Province Entity Address, State or Province Compensation expense related to restricted stock grants APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Total current liabilities Liabilities, Current Facility operating expense Real Estate [Member] Private pay Private Pay [Member] Private Pay Individual: Individual [Axis] Property, plant and equipment and leasehold intangibles Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Basic and diluted net income (loss) per share attributable to Brookdale Senior Living Inc. common stockholders Earnings Per Share Reconciliation [Abstract] Leases Lessee, Finance Leases [Text Block] Net cash received Proceeds From (Repayments Of) Divestiture Of Businesses Proceeds From (Repayments Of) Divestiture Of Businesses Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Reported Value Measurement Reported Value Measurement [Member] Litigation Legal Matters and Contingencies [Text Block] Valuation allowance Deferred Tax Assets, Valuation Allowance Capital expenditures, net of related payables: Capital Expenditures, Net Of Related Payables [Member] Capital Expenditures, Net Of Related Payables Restricted cash Restricted cash - current Restricted Cash and Investments, Current Segment Information Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Depreciation and amortization, net Depreciation, Depletion and Amortization Other assets, net Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key Incremental shares issuable upon certain events for 2029 Notes 2029 Notes Incremental Shares [Member] 2029 Notes Incremental Shares PEO Name PEO Name Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] Schedule of Computation of Basic Weighted Average Shares Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block] Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Prepaid expenses and other assets, net Prepaid expenses and other assets, net Increase (Decrease) in Prepaid Expense and Other Assets Exercise Price Award Exercise Price Acquisition of assets: Business Combination, Series of Individually Immaterial Business Combinations [Member] Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other Payment for (Proceeds from) Other Investing Activity Subsequent Event Type [Axis] Subsequent Event Type [Axis] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Assets Assets [Abstract] Long-term debt, less current portion Total long-term debt, less current portion Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] Debt Instrument [Axis] Debt Instrument [Axis] Fair Value Measurements Fair Value Disclosures [Text Block] Gain (loss) on debt modification and extinguishment, net Loss (gain) on debt modification and extinguishment, net Gain (Loss) on Extinguishment of Debt Credit Facility [Domain] Credit Facility [Domain] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Resident in-place lease intangibles Resident and leasehold operating intangibles [Member] Long-lived, depreciable assets including all assets held by a lessee under a capital lease and any addition or improvement to assets held under lease arrangement (including addition or improvement to asset held by lessee under operating lease arrangement). Interest rate (as percent) Debt Instrument, Interest Rate, Stated Percentage Real Estate Properties [Domain] Real Estate Properties [Domain] Shares withheld for employee taxes (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Operating lease obligations, less current portion Operating Lease, Liability, Noncurrent Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Community labor expenses: Labor and Related Expense Schedule of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Restricted Stock Unit and Stock Award Grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Document Quarterly Report Document Quarterly Report Long-term debt, fair value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Mortgage Debt Due 2025 Mortgage Debt Due 2025 [Member] Mortgage Debt Due 2025 Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Term of interest (in years) Debt Instrument, Term Of Interest Debt Instrument, Term Of Interest Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Letters of credit issued Letters of Credit Outstanding, Amount Land Land [Member] Management fees Management Service [Member] Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Noncontrolling interest Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt face amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Litigation settlement, fee expense Litigation Settlement, Fee Expense Facility operating expense (excluding facility depreciation and amortization of $68,916 and $86,209, respectively) Total facility operating expenses Operating Costs and Expenses Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Revenue recognized Contract with Customer, Liability, Revenue Recognized CCRCs Segment CCRCs Segment [Member] CCRCs Segment MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Financing lease obligations Finance Lease, Right-Of-Use Asset, Interest Expense Finance Lease, Right-Of-Use Asset, Interest Expense Weighted average shares used in computing basic and diluted net income (loss) per share Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Financing lease obligations Increase (Decrease) In Financing Lease Obligations Increase (Decrease) In Financing Lease Obligations Incremental shares issuable upon certain events for 2026 Notes 2026 Notes Incremental Shares [Member] 2026 Notes Incremental Shares Segments [Domain] Segments [Domain] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Amortization of deferred financing costs Amortization of Debt Issuance Costs and Discounts Interest expense: Interest Expense, Operating and Nonoperating [Abstract] Cost of Revenue [Abstract] Cost of Revenue [Abstract] Company Selected Measure Name Company Selected Measure Name Monthly resident fees Contract With Customer, Liability, Deferred Revenue, Monthly Resident Fees Contract With Customer, Liability, Deferred Revenue, Monthly Resident Fees Fair Value Measurement [Domain] Fair Value Measurement [Domain] Proceeds from sale of assets, net Proceeds from Sales of Assets, Investing Activities Debt Debt Disclosure [Text Block] Preferred stock, $0.01 par value, 50,000,000 shares authorized at March 31, 2026 and December 31, 2025; no shares issued and outstanding Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Current Property Ownership Status Current Property Ownership Status [Member] Current Property Ownership Status [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Common stock, $0.01 par value, 400,000,000 shares authorized at March 31, 2026 and December 31, 2025; 249,316,153 and 248,274,011 shares issued and 238,788,628 and 237,746,486 shares outstanding as of March 31, 2026 and December 31, 2025, respectively (including 28,929 unvested restricted shares as of March 31, 2026 and December 31, 2025) Common Stock, Value, Issued Loss on debt modification and extinguishment, net Extinguishment of Debt, Gain (Loss), Net of Tax Weighted average shares used in computing diluted net income (loss) per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] 2029 Notes at initial conversion rate Convertible Senior Notes Due 2029 [Member] Convertible Senior Notes Due 2029 Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Other facility operating expenses Other Cost and Expense, Operating Noncontrolling interest: Noncontrolling Interest [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Restricted stock and restricted stock units Restricted Stock And Restricted Stock Units (RSUs) [Member] Restricted Stock And Restricted Stock Units (RSUs) Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income Taxes Income Tax Disclosure [Text Block] Non-development Non-Development [Member] Non-Development [Member] Refundable fees and deferred revenue Increase (Decrease) In Refundable Fees And Contract With Customers, Liability Increase (Decrease) In Refundable Fees And Contract With Customers, Liability Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Fifth Amended and Restated Credit Agreement Fifth Amended And Restated Credit Agreement [Member] Fifth Amended And Restated Credit Agreement [Member] Total equity (deficit) Balance at beginning of period Balance at end of period Equity, Including Portion Attributable to Noncontrolling Interest Number of communities sold Number of Communities Sold Number of Communities Sold Document Type Document Type Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in-capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Total revenue Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Long-Term Debt, Capital Leases and Financing Obligations [Abstract] Debt Instruments [Abstract] All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Acquisition of assets, net of related payables [Line Items] Noncash or Part Noncash Acquisitions [Line Items] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Capital expenditures, net of related payables Net cash paid Payments to Acquire Property, Plant, and Equipment Deferred Revenue and Credits Deferred Revenue And Credits [Member] Deferred Revenue And Credits [Member] Name Forgone Recovery, Individual Name Total current assets Assets, Current Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Weighted average minimum shares issuable under purchase contracts (in shares) Weighted Average Number of Shares Issued, Basic Capital Expenditure, Type [Domain] Capital Expenditure, Type [Domain] [Domain] for Capital Expenditure, Type [Axis] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Noncash or Part Noncash Acquisitions by Unique Description [Axis] Noncash or Part Noncash Acquisitions by Unique Description [Axis] Payments of employee taxes for withheld shares Payment, Tax Withholding, Share-Based Payment Arrangement Mortgage Debt Due 2033 Mortgage Debt Due 2033 [Member] Mortgage Debt Due 2033 Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Marketable securities Marketable Securities, Current Shares issued for settlement of prepaid stock purchase contracts Stock Issued During Period, Value, Settlement Of Prepaid Stock Purchase Contracts Stock Issued During Period, Value, Settlement Of Prepaid Stock Purchase Contracts Loss (gain) on sale of communities, net Gain (Loss) on Sale of Properties Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Current liabilities Liabilities, Current [Abstract] Credit Facilities [Line Items] Line of Credit Facility [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Loss (gain) on sale of assets, net Gain (Loss) on Disposition of Assets Diluted net income (loss) per share attributable to Brookdale Senior Living Inc. common stockholders (in dollars per share) Earnings Per Share, Diluted Mortgage Debt Due 2027 Mortgage Debt Due 2027 [Member] Mortgage Debt Due 2027 Facility depreciation and amortization Cost, Depreciation and Amortization Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) security Title of 12(b) Security Other third-party payor programs Other Third-Party Payor Programs [Member] Other Third-Party Payor Programs Treasury stock, shares (in shares) Treasury Stock, Common, Shares Earnings Per Share [Abstract] Earnings Per Share [Abstract] Consolidation Items [Domain] Consolidation Items [Domain] Total segment operating income Gross Profit Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Independent Living Independent Living [Member] Independent Living [Member] Noncash or Part Noncash Acquisition, Name [Domain] Noncash or Part Noncash Acquisition, Name [Domain] Number of communities managed by third party Number Of Communities Managed Number Of Communities Managed Income taxes paid, net of (refunds) Income Taxes Paid, Net Award Timing Disclosures [Line Items] Aggregate outstanding principal Long-Term Debt, Gross Number of communities leased Operating And Financing Leases, Number Of Communities Operating And Financing Leases, Number Of Communities Property, Plant and Equipment and Leasehold Intangibles, Net Property, Plant and Equipment Disclosure [Text Block] Property and casualty insurance income Property And Casualty Insurance Income Property And Casualty Insurance Income Development Development [Member] Development [Member] Property, plant and equipment and leasehold intangibles, classified as held for sale Asset, Held-for-Sale, Not Part of Disposal Group Property, plant and equipment and leasehold intangibles, net Property, plant and equipment and leasehold intangibles, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders Net income (loss) attributable to Brookdale Senior Living Inc. common stockholders Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Construction in progress Construction in Progress [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Adoption Date Trading Arrangement Adoption Date Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of communities securing debt Debt Instrument, Number Of Communities Securing Debt Debt Instrument, Number Of Communities Securing Debt Accounts receivable, net Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Variable Mortgages Variable Mortgages [Member] Variable Mortgages Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Income (loss) from operations Income (loss) from operations Operating Income (Loss) Line of Credit Line of Credit [Member] Change in lease acquisition deposits, net Change In Lease Acquisition Deposits, Net Change In Lease Acquisition Deposits, Net Accumulated deficit Retained Earnings (Accumulated Deficit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Assisted Living And Memory Care Segment Assisted Living and Memory Care Assisted Living And Memory Care [Member] Assisted Living And Memory Care [Member] Outstanding mortgage debt Repayments of Debt Mortgage debt SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Current portion of financing lease obligations Finance Lease, Liability, Current Proceeds from debt Proceeds from Issuance of Long-Term Debt Current Fiscal Year End Date Current Fiscal Year End Date Subsequent Event Type [Domain] Subsequent Event Type [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Capital Expenditure, Type [Axis] Capital Expenditure, Type [Axis] Capital Expenditure, Type [Axis] Other non-operating income (loss) Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Deferred income tax (benefit) provision Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash Flows from Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Revenue Benchmark Revenue Benchmark [Member] Contract with customer, liability Contract with Customer, Liability Weighted average common shares outstanding (in shares) Weighted Average Number Of Shares Outstanding Weighted Average Number Of Shares Outstanding Sale and maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Financing lease obligations, less current portion Finance Lease, Liability, Noncurrent Shares issued for settlement of prepaid stock purchase contracts (in shares) Stock Issued During Period, Shares, Settlement Of Prepaid Stock Purchase Contracts Stock Issued During Period, Shares, Settlement Of Prepaid Stock Purchase Contracts 2026 Notes at initial conversion rate Incremental shares issuable upon certain events for 2026 Notes Convertible Senior Notes Due 2026 [Member] Convertible Senior Notes Due 2026 Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Treasury stock, at cost; 10,527,525 shares at March 31, 2026 and December 31, 2025 Treasury Stock, Common, Value Leases Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Restricted stock and restricted stock units, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Weighted average shares used in computing basic net income (loss) per share (in shares) Weighted average shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Supplemental Disclosure of Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Costs incurred on behalf of managed communities Cost of Product and Service Sold Restricted cash Restricted cash - non-current Restricted Cash and Cash Equivalent, Noncurrent Segment Reporting [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number Credit Agreement With Capital One, National Association Credit Agreement With Capital One, National Association [Member] Credit Agreement With Capital One, National Association Trade accounts payable Accounts Payable, Trade, Current Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued Mortgage notes payable Fixed Mortgage Notes Payable [Member] Fixed Mortgage Notes Payable Use of Estimates Use of Estimates, Policy [Policy Text Block] Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Proceeds from sale of business, affiliate and productive assets Proceeds from Sales of Business, Affiliate and Productive Assets Gross deferred federal, state and local tax expense (benefit) Deferred Federal, State and Local, Tax Expense (Benefit) Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Prepaid insurance premiums financed with notes payable Increase (Decrease) In Prepaid Insurance Premiums Increase (Decrease) In Prepaid Insurance Premiums Shares issued for warrant exercise Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Number of communities classified as held for sale Number of Communities Classified As Held For Sale Number of communities classified as held for sale during the period. Consolidation Items [Axis] Consolidation Items [Axis] Number of communities leased Operating Leases, Number Of Communities Operating Leases, Number Of Communities Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Common stock: Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Additional shares issuable (in shares) Additional Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Additional Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Property, plant and equipment and leasehold intangibles, net Increase (Decrease) In Property, Plant And Equipment And Leasehold Intangibles, Net Increase (Decrease) In Property, Plant And Equipment And Leasehold Intangibles, Net