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Fair Value Measurements (Tables)
12 Months Ended
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
DescriptionAs of December, 31, 2020Level 1Level 2Level 3
Assets:
Cash, cash equivalents:
Demand and time deposits$8.5 $8.5 — — 
Fair Value Hierarchy
DescriptionAs of December, 31, 2019Level 1Level 2Level 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,
 20202019
 Carrying AmountFair ValueCarrying AmountFair Value
Long-term debt, including current portion (1)
Convertible notes$515.6 $967.1 $1,163.1 $1,730.2 
Long-term debt2,975.7 2,966.8 2,449.3 2,427.8 
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(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,
202020192018
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