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Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items). 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Operating leases, weighted average remaining term (in years) Operating Lease, Weighted Average Remaining Lease Term Accrual for probable loss Loss Contingency Accrual Debt, maturity period (years) Debt, Maturity Period Debt Instrument Maturity Period Schedule of Share-Based Compensation Share-based Payment Arrangement, Cost by Plan [Table Text Block] Impairment, restructuring and other charges from continuing operations Impairment, Restructuring, And Other (Recoveries) Charges, Continuing Operations Impairment, Restructuring, And Other (Recoveries) Charges, Continuing Operations OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Performance units Performance Shares [Member] Reclassification of net unrealized (gains) losses on derivative instruments to net income, net of tax of $0.7, $(0.7), $0.9 and $(0.7), respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Cash used in operating activities Cash Provided by (Used in) Operating Activities, Discontinued Operations Summary of Outstanding Derivative Contracts Derivative Volume [Table Text Block] Tabular disclosure of the volume of the entity's derivatives. 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and related cost, cost incurred to date Restructuring and Related Cost, Cost Incurred to Date Finance leases, weighted average discount rate (percent) Finance Lease, Weighted Average Discount Rate, Percent Variable lease cost Variable Lease, Cost Lender Name [Axis] Lender Name [Axis] Investment, Name [Axis] Investment, Name [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Loss related to interest rate swap agreements expected to be reclassified Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Entity Central Index Key Entity Central Index Key Awards outstanding at September 30, 2019 (shares) Awards outstanding at March 28, 2020 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Entity Emerging Growth Company Entity Emerging Growth Company Noncontrolling Interest Noncontrolling Interest [Member] Selling, general and administrative Selling, 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Long-term debt Long-term Debt, Excluding Current Maturities Derivative [Table] Derivative [Table] Assets: Assets, Fair Value Disclosure [Abstract] Restricted and deferred stock units Deferred Stock Units [Member] Deferred Stock Units Master Repurchase And Framework Agreements, The Amendments Master Repurchase And Framework Agreements, The Amendments [Member] Master Repurchase And Framework Agreements, The Amendments [Member] Instrument 2 Interest Rate Swap, Instrument 2 [Member] Interest Rate Swap, Instrument 2 [Member] Proceeds from Issuance of Senior Long-term Debt Proceeds from Issuance of Senior Long-term Debt Receivables Facility Receivables Facility [Member] Receivables Facility [Member] Credit Facility [Domain] Credit Facility [Domain] 2020 (remainder of the year) Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Fair value, inputs, level 2 Fair Value, Inputs, Level 2 [Member] INCOME TAXES Income Tax Disclosure [Text Block] TruGreen Joint Venture TruGreen Joint Venture [Member] TruGreen Joint Venture [Member] Maturities of Finance Lease Liabilities by Fiscal Year Schedule Finance Lease, Liability, Maturity [Table Text Block] Purchase Agreement, Terms, Consideration To Be Paid Purchase Agreement, Terms, Consideration To Be Paid Purchase Agreement, Terms, Consideration To Be Paid 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months Disposal Group Name [Domain] Disposal Group Name [Domain] Defined benefit plan, accumulated other comprehensive loss, after tax Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Other assets Other Assets, Noncurrent Indoor, urban and hydroponic gardening Indoor, Urban And Hydroponic Gardening [Member] Indoor, Urban And Hydroponic Gardening [Member] Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Other Comprehensive Income (Loss), Net of Tax, Total Other Comprehensive Income 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period Stock Repurchase Program, Period in Force Other Other Assets, Fair Value Disclosure Schedule of the Fair Values of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Net unrealized loss on derivative instruments, net of tax of $(3.9), $(0.8), $(4.3) and $(3.6), respectively Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Marketing Agreement [Domain] Marketing Agreement [Domain] Marketing Agreement [Domain] Other current liabilities Other Liabilities, Current Lease liability, current Lease Liability, Current Lease Liability, Current Total Equity - Controlling Interest Parent [Member] Cost not yet recognized, period (years) Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Accounting Policies [Abstract] Accounting Policies [Abstract] Commission threshold Commission Threshold Commission Threshold Finance leases, weighted average remaining term (in years) Finance Lease, Weighted Average Remaining Lease Term Employee Termination, Facility Closure, and Impairment of Property, Plant and Equipment Employee Termination, Facility Closure, And Impairment Of Property, Plant And Equipment [Member] Employee Termination, Facility Closure, And Impairment Of Property, Plant And Equipment [Member] Title of Individual [Domain] Title of Individual [Domain] Disposal Group Name [Axis] Disposal Group Name [Axis] Income tax expense from discontinued operations Discontinued Operation, Tax Effect of Discontinued Operation United States UNITED STATES Fair Value Measurement [Domain] Fair Value Measurement [Domain] Purchase Agreement, Terms, Value Of Finished Goods Inventory Purchase Agreement, Terms, Value Of Finished Goods Inventory Purchase Agreement, Terms, Value Of Finished Goods Inventory Investments in acquired businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Income (loss) from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Interest rate of debt (percentage) Debt Instrument, Interest Rate, Stated Percentage Payments of Financing Costs Payments of Financing Costs Proceeds from (investments in) loans receivable Payments for (Proceeds from) Loans Receivable Finished goods Inventory, Finished Goods, Gross Entity Address, Address Line One Entity Address, Address Line One Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Other income / expense, net Other Operating Income (Expense) [Member] Net foreign currency translation adjustment reclassifications to net income (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax Unrecognized losses on derivatives AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax Financing receivable, before allowance for credit loss Financing Receivable, before Allowance for Credit Loss Gross profit Gross Profit Geographical [Domain] Geographical [Domain] Restructuring and other Increase (Decrease) in Restructuring Reserve Outdoor Home Services Holdings LLC Outdoor Home Services Holdings LLC [Member] Outdoor Home Services Holdings LLC [Member] Payments on seller notes Repayments of Notes Payable Entity Address, State or Province Entity Address, State or Province Income Statement Location [Axis] Income Statement Location [Axis] 2023 Capital Leases, Future Minimum Payments Due in Four Years Business Acquisition [Axis] Business Acquisition [Axis] Operating Segments Operating Segments [Member] Restructuring charges and adjustments Restructuring charges and adjustments Restructuring Charges Class of Treasury Stock [Table] Class of Treasury Stock [Table] Organization Consolidation And Presentation Of Financial Statements Disclosure [Policy Text Block] Organization Consolidation And Presentation Of Financial Statements Disclosure [Policy Text Block] The disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Investing Activities Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Proceeds from Contributions from Affiliates Proceeds from Contributions from Affiliates 2022 Capital Leases, Future Minimum Payments Due in Three Years Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Proceeds from sale of long-lived assets Proceeds from Sale of Property, Plant, and Equipment 2022 Finance Lease, Liability, Payments, Due Year Three Senior Notes 4.500% Senior Notes 4.50 Percent Due 2029 [Member] [Domain] Senior Notes 4.50 Percent Due 2029 [Member] [Domain] Accounts payable Accounts Payable, Current Schedule of Interest Rate Swap Agreements Schedule of Derivative Instruments [Table Text Block] Finance lease right-of-use assets Finance Lease, Right-of-Use Asset SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Brand Extension Asset Purchase Agreement Brand Extension Asset Purchase Agreement [Member] Brand Extension Asset Purchase Agreement [Member] U.S. Consumer U.S. Consumer [Member] U.S. Consumer Accrued Liabilities, Current Accrued Liabilities, Current Weighted-Average Remaining Lease Term and Discount Rate and Supplemental Balance Sheet Information Schedule Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Entity Interactive Data Current Entity Interactive Data Current Repayments of senior debt, outstanding principal Repayments Of Senior Debt, Outstanding Principal Repayments Of Senior Debt, Outstanding Principal Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Common shares stated value (USD per share) Common Stock, Par or Stated Value Per Share Marketing Agreement [Axis] Marketing Agreement [Axis] Marketing Agreement [Axis] Repayments of senior debt, accrued and unpaid interest Repayments Of Senior Debt, Accrued And Unpaid Interest Repayments Of Senior Debt, Accrued And Unpaid Interest Awards outstanding (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Tax withholding Payment, Tax Withholding, Share-based Payment Arrangement Inventories Total inventories Inventory, Net Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Instrument 3 Interest Rate Swap, Instrument 3 [Member] Interest Rate Swap, Instrument 3 [Member] Resin (in pounds) 2821 Plastic Materials, Synthetic Resins and Nonvulcan Elastomers [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Nature Of Operations Policy [Policy Text Block] Nature Of Operations Policy [Policy Text Block] The disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Marketing Agreement, Terms, Minimum Earnings Before Income Taxes Marketing Agreement, Terms, Minimum Earnings Before Income Taxes Marketing Agreement, Terms, Minimum Earnings Before Income Taxes Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Summary of Changes in Equity Schedule of Stockholders Equity [Table Text Block] Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Property, plant and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Aggregate fair value at grant dates Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture Income (loss) from discontinued operations (USD per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Award Type [Domain] Award Type [Domain] 2024 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Finance Lease, Liability, Payments, Due after Year Five Total finance lease liabilities Total lease liabilities Finance Lease, Liability Revolving loans Revolving Credit Facility Revolving Credit Facility [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] In Re Scotts EZ Seed Litigation In Re Scotts EZ Seed Litigation [Member] In Re Scotts EZ Seed Litigation [Member] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Hedging Designation [Axis] Hedging Designation [Axis] Ownership [Domain] Ownership [Domain] Reclassification of net pension and other post-retirement benefit losses to net income - tax impact Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Cost of sales—impairment, restructuring and other: Cost of sales Cost of Sales [Member] Dividends paid Payments of Ordinary Dividends, Common Stock Restricted Stock Units (RSUs) Restricted stock units Restricted Stock Units (RSUs) [Member] Operating lease amortization of ROU assets Operating Lease, Right-Of-Use Asset, Amortization Operating Lease, Right-Of-Use Asset, Amortization Effective tax rate related to continuing operations Effective Income Tax Rate Reconciliation, Percent Long-term Debt, Fair Value Long-term Debt, Fair Value Instrument 4 Interest Rate Swap, Instrument 4 [Member] Interest Rate Swap, Instrument 4 [Member] Summary of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table 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] Liabilities, Total Liabilities Total impairment, restructuring and other charges (recoveries) Total Impairment, Restructuring and Other Charges The aggregate costs and expenses related to impairment restructuring and other charges. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items). Hawthorne Hawthorne [Member] Hawthorne [Member] Project Catalyst Project Catalyst [Member] Project Catalyst [Member] Other Long-term Debt [Member] Other Long-term Debt [Member] Other Long-term Debt [Member] Income (Loss) From Discontinued Operations, Net Of Tax Income (Loss) From Discontinued Operations, Net Of Tax [Member] Income (Loss) From Discontinued Operations, Net Of Tax Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] May 5, 2020 Interest Rate Swap Agreements May 5, 2020 Interest Rate Swap Agreements [Member] May 5, 2020 Interest Rate Swap Agreements Wild Bird Food Wild Bird Food [Member] Wild Bird Food Interest Rate Swap, Instrument 8 Interest Rate Swap, Instrument 8 [Member] Interest Rate Swap, Instrument 8 Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Inventories Increase (Decrease) in Inventories Insurance recoveries Insurance Recoveries Restructuring and other charges from continuing operations Restructuring And Other Related Charges, Continuing Operations Restructuring And Other Related Charges, Continuing Operations Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Third Restated Agreement Third Restated Agreement [Member] Third Restated Agreement [Member] Instrument 5 Interest Rate Swap, Instrument 5 [Member] Interest Rate Swap, Instrument 5 [Member] Accounts receivable pledged Pledged Assets Separately Reported, Finance Receivables Pledged as Collateral, at Fair Value Weighted-average common shares outstanding during the period (shares) Weighted Average Number of Shares Outstanding, Basic Operating lease right-of-use-assets Operating Lease, Right-of-Use Asset Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Adoption of new accounting pronouncements (see Note 1) New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Equity Components [Axis] Equity Components [Axis] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Total equity—controlling interest Equity beginning balance Equity ending balance Stockholders' Equity Attributable to Parent Intangible asset amortization Amortization of Intangible Assets Operating expenses Operating Expense [Member] Marketing Agreement [Table] Marketing Agreement [Table] Marketing Agreement [Table] Proceeds from sale of brand extension assets Proceeds from Sale of Other Productive Assets Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Controls Controls [Member] Controls [Member] Post-closing working capital adjustment obligation Business Combinations, Post-Closing Working Capital Adjustment Obligation Business Combinations, Post-Closing Working Capital Adjustment Obligation Outstanding commodity contracts, volume Derivative, Nonmonetary Notional Amount, Volume Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Lease Cost Components and Supplemental Cash Flow Information and Non-Cash Activity For Company's Leases Schedules Lease, Cost [Table Text Block] Proceeds From Settlement Of Escrow Funds Proceeds From Settlement Of Escrow Funds Proceeds From Settlement Of Escrow Funds COVID-19 Pandemic COVID-19 Pandemic [Member] COVID-19 Pandemic Interest paid Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Forecast Forecast [Member] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Treasury share purchases Treasury Stock, Value, Acquired, Cost Method Security Exchange Name Security Exchange Name Leverage ratio, restricted payment threshold Leverage Ratio, Restricted Payment Threshold Leverage Ratio, Restricted Payment Threshold Accrual for environmental actions Accrual for Environmental Loss Contingencies, Gross Depreciation Depreciation Litigation Case [Axis] Litigation Case [Axis] Contractual Commitments Future Minimum Payments Due Contractual Commitments Future Minimum Payments Due Minimum contractual payments as defined in agreement. Investment in unconsolidated affiliates Equity Method Investments Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Equity Component [Domain] Equity Component [Domain] Impairment, restructuring and other Restructuring and other charges (recoveries), net Restructuring, Settlement and Impairment Provisions Hedging Relationship [Domain] Hedging Relationship [Domain] Interest Rate Swap, Instrument 7 Interest Rate Swap, Instrument 7 [Member] Interest Rate Swap, Instrument 7 Document Transition Report Document Transition Report Other current liabilities Other Current Liabilities [Member] Weighted Average Costing Method To First In First Out Method Weighted Average Costing Method To First In First Out Method [Member] Weighted Average Costing Method To First In First Out Method [Member] Cash Flow Hedging Cash Flow Hedging [Member] Debt issuance costs, net Debt Issuance Costs, Net Financing cash flows from finance leases Finance Lease, Principal Payments Vesting (percentage of target performance share units granted) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Vesting Percentage As Percent Of Target Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Vesting Percentage As Percent Of Target Authorized repurchase amount Stock Repurchase Program, Authorized Amount Minimum termination fee payable threshold Minimum Termination Fee Payable, Threshold Minimum Termination Fee Payable, Threshold Adjustments to reflect inventories at net realizable values Inventory Valuation Reserves Other non-current items Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net Credit Facilities Line of Credit [Member] Continuing Operations Continuing Operations [Member] 2022 Operating Leases, Future Minimum Payments, Due in Three Years Derivative Instruments, Gain (Loss) by Hedging Relationship [Axis] Hedging Relationship [Axis] Income (loss) from discontinued operations, net of tax Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Long-term Debt Long-term Debt [Member] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Income Statement [Abstract] Income Statement [Abstract] Sunlight Supply Sunlight Supply [Member] Sunlight Supply [Member] Restructuring Plan [Domain] Restructuring Plan [Domain] Derivative asset Derivative Asset, Fair Value, Gross Asset Balance Sheet Location [Axis] Balance Sheet Location [Axis]