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Fair Value Measurements (Tables) | 3 Months Ended
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Dec. 31, 2016
Fair Value Disclosures [Abstract] |
Fair Value Assets and Liabilities Measured on Recurring Basis | Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following at December 31, 2016:
|  |  | Fair Value at Reporting Date Using
| Balance as of December 31, 2016 |  | Quoted Prices in Active Market for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Assets: |  |  |  |  |  |  |
Equity securities | $ | 4.4 |  |  | $ | 4.4 |  |  | $ | — |  |  | $ | — |
Interest rate cap - derivative | 2.5 |  |  | — |  |  | 2.5 |  |  | — |
Forward foreign currency contracts | 7.4 |  |  | — |  |  | 7.4 |  |  | — |
Total | $ | 14.3 |  |  | $ | 4.4 |  |  | $ | 9.9 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |
Deferred compensation liabilities | $ | 41.1 |  |  | $ | 41.1 |  |  | $ | — |  |  | $ | — |
Total | $ | 41.1 |  |  | $ | 41.1 |  |  | $ | — |  |  | $ | — |
Estimated Fair Values of Convertible Notes | The estimated fair values of the Company’s Convertible Notes at December 31, 2016 were as follows:
2012 Notes | 494.2 |
2013 Notes | 451.4 |
| $ | 945.6 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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