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Postretirement Benefits (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | [1] | Sep. 30, 2017 | [1] | Jul. 01, 2017 | [1] | Apr. 01, 2017 | [1] | Dec. 31, 2016 | [1] | Oct. 01, 2016 | [1] | Jul. 02, 2016 | [1] | Apr. 02, 2016 | [1] | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Contribution Plan Expense |  |  |  |  |  |  |  |  | $ 52.1 |  | $ 46.3 |  | $ 46.3
Settlement Loss | $ 96.6 | $ 0.0 | $ 0.0 | $ 0.0 | $ 55.1 | $ 0.0 | $ 0.0 | $ 0.0 | 96.6 | [1] | 55.1 | [1] | 82.3
Pension Plans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Payments |  |  |  |  |  |  |  |  | 234.4 |  | 125.2 |  |
Settlement Loss |  |  |  |  |  |  |  |  | 96.6 |  | 55.1 |  | 82.3
Brunswick Pension Plan For Hourly Bargaining Unit Employees and the Brunswick Pension Plan For Salaried Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Payments |  |  |  |  |  |  |  |  | 132.7 |  | 125.2 |  |
Settlement Loss |  |  |  |  |  |  |  |  |  |  | $ 55.1 |  |
Brunswick Pension Plan For Hourly Employees and the Brunswick Pension Plan For Hourly Wage Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Payments |  |  |  |  |  |  |  |  | 101.7 |  |  |  |
Bargaining Plan, Salaried Plan, Hourly Plan and Muskegon Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Loss |  |  |  |  |  |  |  |  | $ 96.6 |  |  |  |
Brunswick Pension Plan for Selected Current and Former Employees and the Brunswick Pension Plan for Salaried Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement Payments |  |  |  |  |  |  |  |  |  |  |  |  | 191.8
Purchase of Group Annuity Contract |  |  |  |  |  |  |  |  |  |  |  |  | (130.1)
Settlement Loss |  |  |  |  |  |  |  |  |  |  |  |  | 82.3
Lump Sum Payments |  |  |  |  |  |  |  |  |  |  |  |  | $ 61.7
[1] | (B) Pension settlement charges are discussed in Note 17 – Postretirement Benefits in the Notes to Consolidated Financial Statements.

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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 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(7) -URI http://asc.fasb.org/extlink&oid=82843861&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/presentationRef -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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