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Employee Benefits (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
General Discussion of Pension and Other Postretirement Benefits [Abstract] |  |  |
Number of Participants Domestic Pension Plan | 3,600 |  |
Number of Participants Postretirement Benefit Plan | 1,800 |  |
Deferred Compensation Arrangements [Abstract] |  |  |
Deferred Compensation Liability | $ 92.4 | $ 95.7 |
Deferred Compensation Expense | 9.7 | 6.3 | $ 9.8
Deferred Benefit Liability | 129.1 | 141.5 |
Deferred Benefit Expense | 8.8 | 9.7 | $ 10.8
Cash Surrender Value of Life Insurance | 171.5 | 167.0 |
Deferred Compensation Plan Assets | 12.9 | 10.7 |
Supplemental Unemployment Benefits [Abstract] |  |  |
Health and Life Insurance Benefit Obligation | 8.2 | $ 8.0 |
Income Replacement Benefit Obligation | 0.0 |  |
Pre-tax net actuarial loss, re-measurement of the benefit obligation | $ 79.0 |  |

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- Definition Pre-tax net actuarial loss in Q3 2016 resulting from re-measurement of the U.K. Pension Plan. The net actuarial loss was primarily due to an increase to the projected benefit obligation resulting from a lower discount rate, partially offset by higher actual investment returns. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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- Definition The carrying amount as of the balance sheet date of the obligations recognized for the various benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -SubTopic 10 -Section 25 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6410138&loc=d3e79691-111665 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -SubTopic 10 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6410138&loc=d3e79708-111665 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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