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Restructuring Activities (Restructuring Rollforward) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring costs | $ 0.0 | $ 2.5 | $ 0.0 | $ 7.1
Restructuring and impairment costs | 0.0 | 22.6 | 0.0 | 42.6
Amounts paid |  |  | (4.3) | (27.5)
2017 Plan [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 3.3 | 0.0
Restructuring and impairment costs |  |  |  | 2.0
Amounts paid |  |  | (2.5) | (0.4)
Restructuring reserve, ending balance | 0.8 | 1.6 | 0.8 | 1.6
2017 Plan [Member] | Severance and employee related [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 3.3 | 0.0
Restructuring and impairment costs |  |  |  | 1.7
Amounts paid |  |  | (2.5) | (0.1)
Restructuring reserve, ending balance | 0.8 | 1.6 | 0.8 | 1.6
2017 Plan [Member] | Exit or disposal activities [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 0.0 | 0.0
Restructuring and impairment costs |  |  |  | 0.3
Amounts paid |  |  |  | (0.3)
Restructuring reserve, ending balance | 0.0 | 0.0 | 0.0 | 0.0
2016 Plan [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 1.7 | 2.0
Restructuring and impairment costs |  |  |  | 47.0
Amounts paid |  |  | (1.3) | (24.7)
Charges against assets |  |  |  | (8.6)
Restructuring reserve, ending balance | 0.4 | 15.7 | 0.4 | 15.7
2016 Plan [Member] | Severance and employee related [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 0.3 | 0.8
Restructuring and impairment costs |  |  |  | 3.0
Amounts paid |  |  | (0.3) | (3.0)
Restructuring reserve, ending balance | 0.0 | 0.8 | 0.0 | 0.8
2016 Plan [Member] | Impairment of property and equipment [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 0.0 | 0.0
Restructuring and impairment costs |  |  |  | 4.6
Charges against assets |  |  |  | (4.6)
Restructuring reserve, ending balance | 0.0 | 0.0 | 0.0 | 0.0
2016 Plan [Member] | Exit or disposal activities [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, beginning balance |  |  | 1.4 | 1.2
Restructuring and impairment costs |  |  |  | 39.4
Amounts paid |  |  | (1.0) | (21.7)
Charges against assets |  |  |  | (4.0)
Restructuring reserve, ending balance | $ 0.4 | $ 14.9 | $ 0.4 | $ 14.9

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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