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Goodwill and Intangibles Finite-Lived Intangibles (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 29, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Amount | $ 936.0 | $ 418.1 | $ 936.0 | $ 418.1 | $ 403.8
Accumulated Amortization | (265.7) | (252.6) | (265.7) | (252.6) | (254.7)
Amortization Expense for Intangibles | 6.8 | 2.1 | 11.2 | 6.2 |
Customer Relationships [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Amount | 735.0 | 305.7 | 735.0 | 305.7 | 305.4
Accumulated Amortization | (247.9) | (236.5) | (247.9) | (236.5) | (238.1)
Other [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Amount | 22.4 | 22.5 | 22.4 | 22.5 | 22.5
Accumulated Amortization | (17.8) | (16.1) | (17.8) | (16.1) | (16.6)
Trade Names [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Amount | 178.6 | 89.9 | 178.6 | 89.9 | 75.9
Accumulated Amortization | 0.0 | 0.0 | 0.0 | 0.0 | 0.0
Marine Engine [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Amount | 618.9 | 78.6 | 618.9 | 78.6 | 78.3
Accumulated Amortization | (44.5) | (38.1) | (44.5) | (38.1) | (38.5)
Boat [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Amount | 223.4 | 223.5 | 223.4 | 223.5 | 223.3
Accumulated Amortization | (203.7) | (202.7) | (203.7) | (202.7) | (202.8)
Fitness [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Amount | 93.7 | 116.0 | 93.7 | 116.0 | 102.2
Accumulated Amortization | $ (17.5) | $ (11.8) | $ (17.5) | $ (11.8) | $ (13.4)

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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