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Fair Value Measurements
6 Months Ended
Jun. 30, 2020
Fair Value by Fair Value Hierarchy Level Extensible List [Abstract]  
Fair Value Measurements Fair Value Measurements
The company uses a three-level classification hierarchy of fair value measurements for disclosure purposes:
Level 1 inputs, which are considered the most reliable evidence of fair value, consist of quoted prices (unadjusted) for identical assets or liabilities in active markets.
Level 2 inputs consist of observable market data, such as quoted prices for similar assets and liabilities in active markets, or inputs other than quoted prices that are directly observable.
Level 3 inputs consist of unobservable inputs which are derived and cannot be corroborated by market data or other entity-specific inputs.
Level 1 assets generally include investments in publicly traded mutual funds, equity securities, corporate debt securities and U.S. government securities with quoted market prices. In general, the company uses quoted prices in active markets for identical assets to determine the fair value of marketable securities.
Level 2 assets and liabilities generally consist of asset-backed securities and long-term debt notes. Asset-backed securities were measured at fair value based on matrix pricing using prices of similar securities with similar inputs such as maturity dates, interest rates and credit ratings. The fair values of the long-term debt notes were based on quoted market prices in an inactive market.
Level 3 assets include certain fixed assets, intangible assets and investments that were impaired or written up in fair value.
Recurring Fair Value Measurements. Financial assets and liabilities recorded at fair value on the consolidated balance sheet as of June 30, 2020 were classified in their entirety based on the lowest level of input that was significant to each asset and liability's fair value measurement. The following table presents financial instruments measured at fair value on a recurring basis:
 June 30, 2020
(in millions)Level 1Level 2Level 3Total
Assets at Fair Value:
Marketable securities:
Corporate debt securities$18.5  $—  $—  $18.5  
Mutual funds69.2  —  —  69.2  
Equity securities0.1  —  —  0.1  
Asset-backed securities—  0.3  —  0.3  
Total Marketable Securities87.8  0.3  —  88.1  
Performance bonds and guaranty fund contributions (1):
       U.S. Treasury securities 3,539.3  —  —  3,539.3  
U.S. government agency securities299.9  —  —  299.9  
Total Assets at Fair Value$3,927.0  $0.3  $—  $3,927.3  
(1) Performance bonds and guaranty fund contributions on the consolidated balance sheet at June 30, 2020 include U.S. Treasury securities and U.S. government agency securities purchased with cash collateral.
Non-Recurring Fair Value Measurements. During the first six months of 2020, the company recognized impairment charges of $30.0 million related to certain intangible assets and fixed assets. The combined fair values of the assets were estimated to be zero at June 30, 2020. The company also recognized net unrealized gains on certain investments of $1.3 million. The combined fair value of these investments were estimated to be $18.1 million at June 30, 2020. These assessments were based on quantitative and qualitative indicators of fair value. The fair value measurements of the intangible assets, fixed assets and investments are considered level 3 and non-recurring.
Fair Values of Long-Term Debt Notes. The following presents the estimated fair values of long-term debt notes, which are carried at amortized cost on the consolidated balance sheets. The fair values below are classified as level 2 under the fair value hierarchy and were estimated using quoted market prices in inactive markets.
At June 30, 2020, the fair values (in U.S. dollar equivalent) were as follows:
(in millions)Fair ValueLevel
$750.0 million fixed rate notes due September 2022$791.9  Level 2
€15.0 million fixed rate notes due May 202318.4  Level 2
$750.0 million fixed rate notes due March 2025828.8  Level 2
$500.0 million fixed rate notes due June 2028602.7  Level 2
$750.0 million fixed rate notes due September 20431,100.9  Level 2
$700.0 million fixed rate notes due June 2048941.4  Level 2