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Postretirement Benefits (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2020 | Sep. 26, 2020 | [1] | Jun. 27, 2020 | [1] | Mar. 28, 2020 | Dec. 31, 2019 | [1] | Sep. 28, 2019 | [1] | Jun. 29, 2019 | Mar. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Contribution Plan Expense |  |  |  |  |  |  |  |  | $ 49.4 |  | $ 44.1 |  | $ 45.3
Settlement Loss | $ 0.0 | $ 0.2 | $ (1.3) | $ 0.0 | $ (1.3) | $ 294.1 | $ 0.0 | $ 0.0 | (1.1) | [1] | 292.8 | [1] | 0.0
Pension Plans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Payments |  |  |  |  |  |  |  |  | 0.0 |  | 673.9 |  |
Settlement Loss |  |  |  |  |  |  |  |  | (1.1) |  | 292.8 |  | 0.0
Other Postretirement Benefit Plans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Payments |  |  |  |  |  |  |  |  | 0.0 |  | 0.0 |  |
Settlement Loss |  |  |  |  |  |  |  |  | $ 0.0 |  | 0.0 |  | $ 0.0
Brunswick Pension Plan For Salaried Employees and Brunswick Pension Plan For Hourly Bargaining Unit Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Payments |  |  |  |  |  |  |  |  |  |  | 673.9 |  |
Settlement Loss |  |  |  |  |  |  |  |  |  |  | 292.8 |  |
Defined Benefit Plan Lump Sum Payment |  |  |  |  |  |  |  |  |  |  | 77.1 |  |
Defined Benefit Plan, Purchase of Group Annuity Contract |  |  |  |  |  |  |  |  |  |  | $ 596.8 |  |
[1] | (D) Pension settlement charges are discussed in Note 17 – Postretirement Benefits

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- Definition The amount that relates to an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include (a) making lump-sum cash payments, including those amounts which did not trigger settlement accounting, to plan participants in exchange for their rights to receive specified benefits and/or (b) purchasing nonparticipating annuity contracts. + References No definition available. + Details
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- Definition Dollar amount paid to purchase group annuity contract to pay certain plan participants. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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- Definition Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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