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Fair Value Measurements (Financial Instruments Recorded at Fair Value) (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Cash and cash equivalents | $ 170.8 | $ 234.0 | $ 180.3 | $ 218.8
Deferred compensation asset | 1.1 | 1.5 |  |
Deferred compensation obligation | 1.1 | 1.4 |  |
Level 1 [Member] |  |  |  |
Cash and cash equivalents | 170.8 | 234.0 |  |
Deferred compensation asset | 1.1 |  |  |
Deferred compensation obligation | $ 1.1 |  |  |
Level 2 [Member] |  |  |  |
Deferred compensation asset |  | 1.5 |  |
Deferred compensation obligation |  | $ 1.4 |  |

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- Definition Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Surrender Value -URI http://asc.fasb.org/extlink&oid=6507153 + Details
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