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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2018
Fair Value Disclosures [Abstract] |
Schedule of financial instrument fair value | The estimated fair value of financial instruments at December 31, 2018 was as follows:
|  |  |  | Fair Value Measurements at Reporting Date Using
(In millions) |  | Total Carrying Amount |  | Total Estimated Fair Value |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Observable Inputs (Level 2)
Cash and cash equivalents |  | $ | 382.0 |  |  | $ | 382.0 |  |  | $ | 382.0 |  |  | $ | — |
Derivative financial instruments: |  |  |  |  |  |  |  |
Assets |  | 3.4 |  |  | 3.4 |  |  | — |  |  | 3.4 |
Liabilities |  | 10.4 |  |  | 10.4 |  |  | — |  |  | 10.4 |
Debt (a) |  | 1,552.5 |  |  | 1,739.4 |  |  | 1,624.4 |  |  | 115.0 |
The estimated fair value of financial instruments at December 31, 2017 was as follows:
|  |  |  | Fair Value Measurements at Reporting Date Using
(In millions) |  | Total Carrying Amount |  | Total Estimated Fair Value |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Observable Inputs (Level 2)
Cash and cash equivalents |  | $ | 141.6 |  |  | $ | 141.6 |  |  | $ | 141.6 |  |  | $ | — |
Derivative financial instruments: |  |  |  |  |  |  |  |
Assets |  | 16.5 |  |  | 16.5 |  |  | — |  |  | 16.5 |
Liabilities |  | 5.5 |  |  | 5.5 |  |  | — |  |  | 5.5 |
Debt (a) |  | 1,553.8 |  |  | 1,853.2 |  |  | 1,736.9 |  |  | 116.3 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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