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Postretirement Benefits (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 01, 2017 | Jul. 02, 2016 | Jul. 01, 2017 | Jul. 02, 2016
Pension Plans [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Interest Cost | $ 7.1 | $ 9.0 | $ 14.2 | $ 17.9
Expected Return on Plan Assets | (8.3) | (9.6) | (16.7) | (19.2)
Amortization of Prior Service Credits | 0.0 | 0.0 | 0.0 | 0.0
Amortization of Net Actuarial Losses | 3.6 | 4.3 | 7.2 | 8.7
Net Pension and Other Benefit Costs | 2.4 | 3.7 | 4.7 | 7.4
Other Postretirement Benefits [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Interest Cost | 0.4 | 0.4 | 0.7 | 0.7
Expected Return on Plan Assets | 0.0 | 0.0 | 0.0 | 0.0
Amortization of Prior Service Credits | (0.2) | (0.1) | (0.4) | (0.3)
Amortization of Net Actuarial Losses | 0.0 | 0.0 | 0.0 | 0.0
Net Pension and Other Benefit Costs | $ 0.2 | $ 0.3 | 0.3 | 0.4
Nonqualified Plan [Member] | Pension Plans [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Contributions By Employer For Nonqualified Pension Plan |  |  | 2.1 | 1.8
Qualified Plan [Member] | Pension Plans [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Contributions By Employer For Nonqualified Pension Plan |  |  | $ 40.0 | $ 35.0

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + 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)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + 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)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + 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 (d)(5)(ii) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(iv)(01) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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