Entity tax identification number Entity Tax Identification Number Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Total investments Master Trust EBP, Investment, Fair Value Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] Note receivable from participant, account, maximum number of loans outstanding EBP, Note Receivable From Participant, Account, Maximum Number Of Loans Outstanding EBP, Note Receivable From Participant, Account, Maximum Number Of Loans Outstanding Employer contribution, receivable, true-up EBP, Employer Contribution, Receivable, True-Up EBP, Employer Contribution, Receivable, True-Up EBP, Tranche Two EBP, Tranche Two [Member] EBP, Tranche Two EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Pretax, maximum annual compensation to total compensation, percentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Requisite service period, number of hours per week EBP, Requisite Service Period, Number Of Hours Per Week Threshold EBP, Requisite Service Period, Number Of Hours Per Week Threshold Maximum borrowing, amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Minimum age to participate EBP, Minimum Age To Participate EBP, Minimum Age To Participate EBP, Employee Eligibility [Axis] EBP, Employee Eligibility [Axis] EBP, Employee Eligibility Investments at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Plan's Interest in Master Trust EBP, Nonconsolidated, Plan Interest in Master Trust [Member] EBP 154 EBP 154 [Member] EBP 154 Level 1 Fair Value, Inputs, Level 1 [Member] EBP, Reconciliation of Financial Statement to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] EBP, Investment, Fair Value and NAV [Abstract] Assets EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Payment of Benefits EBP, Payment to Participant [Policy Text Block] EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] Amendment Flag Amendment Flag Adjustment for certain deemed distributions of participant loans EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution Target Date Retirement Collective Trust Target Date Retirement Collective Trust [Member] Target Date Retirement Collective Trust Basis of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Investment, number of shares (in shares) EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Receivables: EBP, Receivable [Abstract] EBP, Investment, Fair Value and NAV EBP, Investment, Fair Value and NAV [Table Text Block] Recent Accounting Pronouncements EBP, Recent Accounting Pronouncements [Policy Text Block] EBP, Recent Accounting Pronouncements Transfers to other plan (Note 1) Transfers to other plan (Note 1) EBP, Change in Net Asset Available for Benefit, Transfer From Plan EBP, Change in Net Asset Available for Benefit, Transfer From Plan Number of plan administrators, minimum EBP, Number Of Plan Administrators, Minimum EBP, Number Of Plan Administrators, Minimum 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] Requisite service period, number of days of employment EBP, Requisite Service Period, Number Of Days Of Employment EBP, Requisite Service Period, Number Of Days Of Employment Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Employer EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Automatic deferral rate, annual increase EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate Annual increase in percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) until the contribution reaches maximum threshold. Minimum Minimum [Member] Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Investment Type [Axis] Investment Type [Axis] EBP 170 EBP 170 [Member] EBP 170 Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Participants EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Dividend income EBP, Dividend Income EBP, Dividend Income EBP, Contribution Tranche [Domain] EBP, Contribution Tranche [Domain] EBP, Contribution Tranche [Domain] Other Collective Trusts Other Collective Trusts [Member] Other Collective Trusts Transfers from other plans (Note 1) EBP, Change in Net Asset Available for Benefit, Transfer to Plan EBP, Change in Net Asset Available for Benefit, Transfer to Plan 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 from investments 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] Plan number EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan EBP, Description of Plan [Text Block] 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] General loan, borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term 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] Common stock EBP, Employer, Common Stock [Member] Primary residence, borrowing term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term Employer contribution, amount EBP, Employer Contribution, Amount EBP, Employer Contribution, Amount EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Investment income: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Document [Domain] Document [Domain] Investment, Identifier [Axis] Investment, Identifier [Axis] Fair value, investment, NAV, redemption restriction, period in effect EBP, Fair Value, Investment, NAV, Redemption Restriction, Period in Effect Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total investment EBP, Asset Held for Investment Document Information [Line Items] Document Information [Line Items] Net assets available for benefits: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) [Abstract] EBP, Employee Eligibility, More Than 30 Hours Per Week EBP, Employee Eligibility, More Than 30 Hours Per Week [Member] EBP, Employee Eligibility, More Than 30 Hours Per Week EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Interest in Brunswick Corporation Master Trust EBP, Master Trust [Text Block] Participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Involuntary cash-out limit EBP, Involuntary Cash-out Limit EBP, Involuntary Cash-out Limit Net increase in net assets available for benefits before transfers EBP, Change in Net Asset Available for Benefit, Increase (Decrease), Before Transfer To (From) Plan EBP, Change in Net Asset Available for Benefit, Increase (Decrease), Before Transfer To (From) Plan EBP, Tax Status [Table] EBP, Tax Status [Table] Net increase in net assets available for benefits EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related Party and Parties-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 Investment, decrease in fair value EBP, Investment, Increase (Decrease) in Fair Value EBP, Investment, Increase (Decrease) in Fair Value Employer contributions EBP, Employer Contribution, Receivable Automatic deferral rate EBP, Participant Contribution, Automatic, Deferral Rate Retirement age EBP, Retirement Age EBP, Retirement Age Note receivable from participant, account, time period for loans used to reduce maximum borrowing amount EBP, Note Receivable From Participant, Account, Time Period For Loans Used To Reduce Maximum Borrowing Amount EBP, Note Receivable From Participant, Account, Time Period For Loans Used To Reduce Maximum Borrowing Amount Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Plan's Interest in Master Trust Total investments EBP, Investment, Plan Interest in Master Trust, Fair Value Current Value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Participant contribution, pretax, minimum annual compensation to total compensation, percentage EBP, Participant Contribution, Pretax, Minimum Annual Compensation to Total Compensation, Percentage EBP, Participant Contribution, Pretax, Minimum Annual Compensation to Total Compensation, Percentage EBP, Statement of Net Asset Available for Benefit [Abstract] Total Stable Value Collective Trust EBP, Stable Value Collective Trust [Member] EBP, Stable Value Collective Trust EBP, Employee Eligibility, Less Than 30 Hours Per Week EBP, Employee Eligibility, Less Than 30 Hours Per Week [Member] EBP, Employee Eligibility, Less Than 30 Hours Per Week EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] Brunswick ESOP Company Stock Fund EBP, Employer, Common Stock Fund [Member] EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Reconciliation of Financial Statement to Form 5500 [Table] Investment, payable from master trust EBP, Investment, Payable From Master Trust EBP, Investment, Payable From Master Trust Change in interest in Brunswick Corporation Master Trust EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Change in Plan Interest in Master Trust EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] Reconciliation to Form 5500 EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Participant Loans EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] EBP, Master Trust [Table] EBP, Master Trust [Table] Total Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Vesting period EBP, Employer Contribution Vesting Service Period Minimum Vesting service period for company contribution and/ or investment earning to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions. Document Type Document Type Employer contribution, fixed rate contribution, percentage EBP, Employer Contribution, Annual Fixed Rate Contribution, Percentage Fixed rate annual contribution for eligible participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Entity Central Index Key Entity Central Index Key Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Collective trusts Common Collective Trust [Member] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Risk and Uncertainty [Abstract] Participant contribution, automatic, number of days to opt-out EBP, Participant Contribution, Automatic, Number of Days to Opt-Out EBP, Participant Contribution, Automatic, Number of Days to Opt-Out EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Notes receivable from participants EBP, Note Receivable from Participant Master Trust EBP, Nonconsolidated, Master Trust [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name Schedule of Master Trust Net Assets EBP, Master Trust [Table Text Block] Requisite service period, number of months of employment EBP, Requisite Service Period, Number Of Months Of Employment EBP, Requisite Service Period, Number Of Months Of Employment EBP, Subsequent Event [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] EBP, Contribution Tranche [Axis] EBP, Contribution Tranche [Axis] EBP, Contribution Tranche Income Tax Status EBP, Tax Status [Text Block] EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] Document Information [Table] Document Information [Table] Note Receivable from Participants EBP, Note Receivable from Participant [Policy Text Block] Net investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Level 3 Fair Value, Inputs, Level 3 [Member] EBP, Tranche One EBP, Tranche One [Member] EBP, Tranche One Net assets available for benefits Beginning of year End of year Net assets available for benefits per the financial statements EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] EBP, Employee Eligibility [Domain] EBP, Employee Eligibility [Domain] EBP, Employee Eligibility [Domain] Total US All Cap Equity Fund EBP, All-Cap Equity Fund [Member] EBP, All-Cap Equity Fund Forfeited nonvested account EBP, Forfeited Nonvested Account Matching percentage EBP, Employer Contribution, Matching Percentage Document Information, Document [Axis] Document Information, Document [Axis] Net assets per Form 5500 EBP, Form 5500 Caption, Net Assets NAV Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]