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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair Value Disclosures [Abstract] |
Fair Value Of Assets And Liabilities Measured On Recurring Basis | The following table summarizes the Company's financial assets and liabilities, excluding pension assets, measured at fair value on a recurring basis (in millions):
|  |  |  | Fair Value Hierarchy
Description |  | As of December, 31, 2020 |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |
Cash, cash equivalents: |  |  |  |  |  |  |  |
Demand and time deposits |  | $ | 8.5 |  |  | $ | 8.5 |  |  | — |  |  | — |
|  |  |  | Fair Value Hierarchy
Description |  | As of December, 31, 2019 |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |
Cash, cash equivalents: |  |  |  |  |  |  |  |
Demand and time deposits |  | $ | 28.2 |  |  | $ | 28.2 |  |  | — |  |  | — |
Fair Value, by Balance Sheet Grouping | The carrying amounts and fair value of the Company’s long-term borrowings are as follows (in millions):
| As of December 31,
| 2020 |  | 2019
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Long-term debt, including current portion (1) |  |  |  |  |  |  |
Convertible notes | $ | 515.6 |  |  | $ | 967.1 |  |  | $ | 1,163.1 |  |  | $ | 1,730.2 |
Long-term debt | 2,975.7 |  |  | 2,966.8 |  |  | 2,449.3 |  |  | 2,427.8 |
_______________________ (1) Long-term debt is carried on the Consolidated Balance Sheets at historical cost net of debt discount and issuance costs.
Fair Value Measurements, Nonrecurring | The following table shows the adjustments to fair value of certain of the Company's non-financial assets that had an impact on the Company's results of operations (in millions):
|  | Year Ended December 31,
|  | 2020 |  | 2019 |  | 2018
Nonrecurring fair value measurements |  |  |  |  |  |
Asset impairments (Level 3) |  | $ | 17.5 |  |  | $ | 3.4 |  |  | $ | 2.4 |
Goodwill and IPRD impairments (Level 3) |  | 1.3 |  |  | 1.6 |  |  | 6.8 |
|  | $ | 18.8 |  |  | $ | 5.0 |  |  | $ | 9.2 |

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 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 (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: 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=117815213&loc=d3e19207-110258 + Details
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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=121572278&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=117815213&loc=d3e19207-110258 + 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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