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Goodwill and Intangibles Goodwill (Details) - USD ($) $ in Millions | 6 Months Ended
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Jul. 01, 2017 | Jul. 02, 2016
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | $ 413.8 | $ 298.7
Acquisitions | 0.0 | 94.8
Impairments | 0.0 | 0.0
Adjustments | 3.8 | (0.4)
Goodwill, Ending Balance | 417.6 | 393.1
Marine Engine [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 25.1 | 26.2
Acquisitions | 0.0 | 0.0
Impairments | 0.0 | 0.0
Adjustments | 0.8 | (0.1)
Goodwill, Ending Balance | 25.9 | 26.1
Boat [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 2.2 | 0.0
Acquisitions | 0.0 | 12.2
Impairments | 0.0 | 0.0
Adjustments | 0.0 | 0.0
Goodwill, Ending Balance | 2.2 | 12.2
Fitness [Member] |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 386.5 | 272.5
Acquisitions | 0.0 | 82.6
Impairments | 0.0 | 0.0
Adjustments | 3.0 | (0.3)
Goodwill, Ending Balance | $ 389.5 | $ 354.8

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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