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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2017
Fair Value Disclosures [Abstract] |
Schedule of Financial Instruments Recorded at Fair Value | Financial Instruments Recorded at Fair Value (in Millions)
| September 30, 2017 |  | December 31, 2016
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 135.9 |  |  | $ | — |  |  | $ | — |  |  | $ | 135.9 |  |  | $ | 260.7 |  |  | $ | — |  |  | $ | — |  |  | $ | 260.7 |
Deferred compensation asset (a) | 1.3 |  |  | — |  |  | — |  |  | 1.3 |  |  | 1.1 |  |  | — |  |  | — |  |  | 1.1 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation obligation (a) | 1.3 |  |  | — |  |  | — |  |  | 1.3 |  |  | 1.1 |  |  | — |  |  | — |  |  | 1.1 |
(a) | The deferred compensation obligation represents the balance of deferred compensation plus net investment earnings. The deferred compensation plan is funded through a rabbi trust. Trust funds are invested in mutual funds for which unit prices are quoted in active markets and are classified within Level 1 of the valuation hierarchy.

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- References No definition available. + Details
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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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