Investment sold, selling price EBP, Investment Sold, Plan Interest in Master Trust, Selling Price SAVINGS AND INVESTMENT MASTER TRUST EBP, Master Trust [Policy Text Block] Entity tax identification number Entity Tax Identification Number Total investment at fair value EBP, Investment, Fair Value Maximum Maximum [Member] Forfeited non-vested account, decrease from administrative expense EBP, Forfeited Nonvested Account, Decrease from Administrative Expense Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Other Separate Accounts EBP, Other Investment [Member] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Common Stock Funds EBP, Common Stock Funds [Member] EBP, Common Stock Funds Participant maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Participant minimum borrowing amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Net investment income from Master Trust EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), after Investment Expense EBP, Nonemployer, Common Stock Fund EBP, Nonemployer, Common Stock Fund [Member] EBP, Nonemployer, Common Stock Fund Forfeited nonvested, participant reemployment from termination date, period EBP, Forfeited Nonvested Portion, Participant Reemployment From Termination Date, Period EBP, Forfeited Nonvested Portion, Participant Reemployment From Termination Date, Period EBP, Nonconsolidated, Plan Interest in Master Trust EBP, Nonconsolidated, Plan Interest in Master Trust [Member] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Assets EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Additions EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Transfers to other plans, net Transferred out of plan EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] Amendment Flag Amendment Flag Participants EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution Maximum participant and employer contributions for employer stock fund EBP, Investment, Maximum Participant And Employer Contributions For Employer Stock Fund, Percentage EBP, Investment, Maximum Participant And Employer Contributions For Employer Stock Fund, Percentage BASIS OF PRESENTATION EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Participant loan withdrawals EBP, Change In Net Asset Available For Benefit, Decrease From Participant Loan Withdrawals EBP, Change In Net Asset Available For Benefit, Decrease From Participant Loan Withdrawals Number of shares held in investment EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Receivables EBP, Receivable [Abstract] Schedule of Master Trust Investments Assets at Fair Value EBP, Investment, Fair Value and NAV [Table Text Block] TRANSFERS EBP, Transfers [Text Block] EBP, Transfers Investments [Domain] Investments [Domain] EBP, Master Trust [Abstract] USE OF ESTIMATES EBP, Use of Estimate [Policy Text Block] SCHEDULE H, Line 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] RISKS AND UNCERTAINTIES EBP, Risk and Uncertainty [Text Block] Employer EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Participant maximum borrowing term EBP, Note Receivable From Participant, Maximum Borrowing Term EBP, Note Receivable From Participant, Maximum Borrowing Term Investments acquired, purchase price EBP, Investment Acquired, Plan Interest in Master Trust, Purchase Price Minimum Minimum [Member] Investment Type [Axis] Investment Type [Axis] Interest on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Investment gain Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Investment, advisory expenses EBP, Investment, Advisory Expenses EBP, Investment, Advisory Expenses Number of participant loans outstanding at any given time EBP, Note Receivable From Participant, Number Of Loans Outstanding At Any Given Time EBP, Note Receivable From Participant, Number Of Loans Outstanding At Any Given Time Plan number EBP, Plan Number DESCRIPTION OF THE PLAN EBP, Description of Plan [Text Block] Participant contribution, reallocation of investment funds, increment percentage EBP, Participant Contribution, Reallocation Of Investment Funds, Increment Percentage EBP, Participant Contribution, Reallocation Of Investment Funds, Increment Percentage EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] Investment from decrease from sale of business EBP, Change In Net Asset Available For Benefit, Decrease From Sale Of Business EBP, Change In Net Asset Available For Benefit, Decrease From Sale Of Business EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions EBP, Change in Net Asset Available for Benefit, Increase Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Document Information [Line Items] Document Information [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] JOHNSON CONTROLS, INC. SAVINGS AND INVESTMENT MASTER TRUST EBP, Master Trust [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Participant loan repayments EBP, Change In Net Asset Available For Benefit, Increase From Participant Contribution, Participant Loan Repayments EBP, Change In Net Asset Available For Benefit, Increase From Participant Contribution, Participant Loan Repayments EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase in net assets available for benefits Net increase in net assets available for benefits EBP, Change in Net Asset Available for Benefit, Increase (Decrease) RELATED PARTY AND PARTY-IN-INTEREST TRANSACTIONS EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Total receivables EBP, Receivable Employer contributions EBP, Employer Contribution, Receivable Investments EBP, Investment, Fair Value [Abstract] Distributions and withdrawals Participant withdrawals EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Investment in Master Trust at fair value Total value of plan's investment EBP, Investment, Plan Interest in Master Trust, Fair Value Additions to net assets attributed to net appreciation in fair value of investments: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment [Abstract] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] Unit value (in dollars per share) EBP, Fair Value Per Share Or Unit EBP, Fair Value Per Share Or Unit EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] EBP, Employer, Common Stock Fund EBP, Employer, Common Stock Fund [Member] Additions to net assets attributed to: EBP, Change In Net Asset Available For Benefit, Increase (Decrease) From Income (Loss) On Investment And Interest Income On Note Receivable From Participant [Abstract] EBP, Change In Net Asset Available For Benefit, Increase (Decrease) From Income (Loss) On Investment And Interest Income On Note Receivable From Participant Current Value EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution FAIR VALUE MEASUREMENTS EBP, Investment [Policy Text Block] Deductions from net assets attributed to: EBP, Change In Net Asset Available For Benefit, Decrease From Payment To Participant And Expenses [Abstract] EBP, Change In Net Asset Available For Benefit, Decrease From Payment To Participant And Expenses EBP, Master Trust [Table] EBP, Master Trust [Table] Document Type Document Type PLAN TERMINATION EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key Participant loan, interest rate Participant loans, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate Participant auto enrolled in plan after eligibility is met, period EBP, Participant Auto Enrolled In Plan After Eligibility Is Met, Period EBP, Participant Auto Enrolled In Plan After Eligibility Is Met, Period EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] Deductions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Forfeited non-vested account, decrease from employer contribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants EBP, Note Receivable from Participant EBP, Nonconsolidated, Master Trust EBP, Nonconsolidated, Master Trust [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name Cost EBP, Asset Held For Investment, Participant Loan, Cost EBP, Asset Held For Investment, Participant Loan, Cost Schedule of Master Trust Net Assets EBP, Master Trust [Table Text Block] Participant contribution, maximum contribution to gross annual eligible compensation, percentage EBP, Participant Contribution, Maximum Contribution To Gross Annual Eligible Compensation, Percentage EBP, Participant Contribution, Maximum Contribution To Gross Annual Eligible Compensation, Percentage DATE OF MANAGEMENT'S REVIEW EBP, Subsequent Event [Policy Text Block] TAX STATUS EBP, Tax Status [Text Block] EBP, Transfers [Abstract] EBP, Transfers [Abstract] Participant maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage EBP 026 EBP 026 [Member] EBP 026 Document Information [Table] Document Information [Table] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] Total investment income and interest on notes receivable from participants EBP, Change In Net Asset Available For Benefit, Increase (Decrease) From Investment Income (Loss), After Investment Expense And Interest Income On Note Receivable From Participant EBP, Change In Net Asset Available For Benefit, Increase (Decrease) From Investment Income (Loss), After Investment Expense And Interest Income On Note Receivable From Participant EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Net assets available for benefits Net assets available for benefits, beginning of year Net assets available for benefits, end of year EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Forfeited non-vested amount EBP, Forfeited Nonvested Account EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]