XML 40 R24.htm IDEA: XBRL DOCUMENT v3.20.2
Marketable Securities (Tables)
 9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale Debt Securities
The following tables summarize the Company's investments in available-for-sale debt securities:
AmortizedUnrealizedFair
As of September 30, 2020Cost BasisGainsLossesValue
Corporate bonds$2,796.6 $40.1 $(0.7)$2,836.0 
U.S. government and government agency obligations133.5 1.3 (0.1)134.7 
Sovereign bonds65.4 1.2 — 66.6 
Commercial paper390.4 0.2 — 390.6 
Certificates of deposit122.4 0.1 — 122.5 
$3,508.3 $42.9 $(0.8)$3,550.4 
As of December 31, 2019
Corporate bonds$3,960.5 $27.8 $(0.2)$3,988.1 
U.S. government and government agency obligations54.3 0.2 (0.1)54.4 
Sovereign bonds26.9 0.4 — 27.3 
Commercial paper92.3 — — 92.3 
Certificates of deposit72.3 0.1 — 72.4 
$4,206.3 $28.5 $(0.3)$4,234.5 
Marketable Securities, Based on Contractual Maturity Dates The fair values of available-for-sale debt security investments by contractual maturity consist of the following:
September 30,December 31,
20202019
Maturities within one year$1,452.9 $1,596.5 
Maturities after one year through five years2,097.5 2,638.0 
$3,550.4 $4,234.5 
Fair Value and Unrealized Losses of Marketable Securities
The following table shows the fair value of the Company's available-for-sale debt securities that have unrealized losses, aggregated by investment category and length of time that the individual securities have been in a continuous loss position.
Less than 12 Months12 Months or GreaterTotal
As of September 30, 2020Fair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
Corporate bonds$560.5 $(0.7)— — $560.5 $(0.7)
U.S. government and government agency obligations45.5 (0.1)— — 45.5 (0.1)
$606.0 $(0.8)— — $606.0 $(0.8)
As of December 31, 2019
Corporate bonds$257.2 $(0.2)— — $257.2 $(0.2)
U.S. government and government agency obligations
17.3 (0.1)— — 17.3 (0.1)
$274.5 $(0.3)— — $274.5 $(0.3)