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FINANCIAL INSTRUMENTS (Tables)
9 Months Ended
Sep. 30, 2019
Investments, All Other Investments [Abstract]  
Summary of Cash and Available-For-Sale Securities
The following tables summarize the Company’s cash and available-for-sale marketable securities’ amortized cost, gross unrealized gains, gross unrealized losses, and fair value by significant investment category reported as cash and cash equivalents, short-term, or long-term investments as of September 30, 2019, and December 31, 2018 (in millions):
Reported as:
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Cash and
Cash
Equivalents
Short-
term
Investments
Long-
term
Investments
September 30, 2019
Cash$325.2  $—  $—  $325.2  $325.2  $—  $—  
Level 1:
Money market funds641.4  —  —  641.4  641.4  —  —  
U.S. treasuries1,846.9  10.6  (0.7) 1,856.8  —  932.8  924.0  
Subtotal2,488.3  10.6  (0.7) 2,498.2  641.4  932.8  924.0  
Level 2:
Commercial paper117.5  —  —  117.5  3.0  114.5  —  
Corporate debt securities1,958.9  18.0  (0.4) 1,976.5  —  637.0  1,339.5  
U.S. government agencies481.1  1.0  (0.4) 481.7  —  227.9  253.8  
Municipal securities31.2  0.3  —  31.5  —  15.8  15.7  
Subtotal2,588.7  19.3  (0.8) 2,607.2  3.0  995.2  1,609.0  
Total assets measured at fair value$5,402.2  $29.9  $(1.5) $5,430.6  $969.6  $1,928.0  $2,533.0  
 
Reported as:
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Cash and
Cash
Equivalents
Short-
term
Investments
Long-
term
Investments
December 31, 2018
Cash$269.4  $—  $—  $269.4  $269.4  $—  $—  
Level 1:
Money market funds569.1  —  —  569.1  569.1  —  —  
U.S. treasuries1,477.8  1.7  (5.3) 1,474.2  10.0  897.8  566.4  
Subtotal2,046.9  1.7  (5.3) 2,043.3  579.1  897.8  566.4  
Level 2:
Commercial paper110.7  —  —  110.7  1.4  109.3  —  
Corporate debt securities1,607.8  1.3  (4.8) 1,604.3  8.0  724.5  871.8  
U.S. government agencies791.8  0.3  (3.8) 788.3  —  468.9  319.4  
Municipal securities18.4  —  —  18.4  —  4.7  13.7  
Subtotal2,528.7  1.6  (8.6) 2,521.7  9.4  1,307.4  1,204.9  
Total assets measured at fair value$4,845.0  $3.3  $(13.9) $4,834.4  $857.9  $2,205.2  $1,771.3  
Summary of Contractual Maturities of Cash Equivalents and Available-For-Sale Investments
The following table summarizes the contractual maturities of the Company’s cash equivalents and available-for-sale investments (excluding cash and money market funds), as of September 30, 2019 (in millions):
Amortized
Cost
Fair
Value
Mature in less than one year$1,976.2  $1,980.0  
Mature in one to five years2,459.4  2,484.0  
Total$4,435.6  $4,464.0  
Gross Notional Amounts for Derivatives and Aggregate Gross Fair Value Outstanding
The notional amounts for derivative instruments provide one measure of the transaction volume. Total gross notional amounts (in USD) for outstanding derivatives and aggregate gross fair value at the end of each period were as follows (in millions):
Derivatives Designated as Hedging InstrumentsDerivatives Not Designated as Hedging Instruments
September 30,
2019
December 31,
2018
September 30,
2019
December 31,
2018
Notional amounts:
     Forward contracts$192.6  $183.0  $255.4  $182.7  
Gross fair value recorded in:
     Prepaids and other current assets$4.5  $3.1  $3.3  $4.1  
     Other accrued liabilities$0.6  $0.9  $0.6  $1.1