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FAIR VALUE
 9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  
FAIR VALUE
FAIR VALUE
Assets and Liabilities Recorded at Fair Value on a Recurring Basis
The assets and liabilities measured at fair value on a recurring basis were immaterial at September 30, 2018 and December 31, 2017.
Fair Value of Financial Instruments
Our financial instruments include cash and cash equivalents, available-for-sale securities, short-term investments, accounts receivable, debt maturing within one year, accounts payable, long-term debt and foreign exchange forward contracts. The carrying value for cash and cash equivalents, accounts receivable, accounts payable and short-term investments approximate fair value because of the short-term nature of these instruments.
The net asset (liability) amounts recorded in the balance sheet (carrying amount) and the estimated fair values of our remaining financial instruments at September 30, 2018 and December 31, 2017, respectively, consisted of the following:
 
September 30, 2018
 
December 31, 2017
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
Available-for-sale securities
$
4.0

 
$
4.0

 
$
3.7

 
$
3.7

Debt maturing within one year(1)
(16.3
)
 
(16.3
)
 
(25.7
)
 
(25.7
)
Long-term debt(1)
(1,630.8
)
 
(1,598.8
)
 
(1,872.2
)
 
(1,718.6
)
Foreign exchange forward contracts
1.8

 
1.8

 
—

 
—


(1) The carrying value of debt maturing within one year and long-term debt is presented net of debt issuance costs and includes any related discount or premium and unamortized deferred gains on terminated interest-rate swap agreements, as applicable.
The methods and assumptions used to estimate fair value are as follows:
•
Available-for-sale securities - The fair values of these investments were the quoted market prices for issues listed on securities exchanges.
•
Debt maturing within one year and long-term debt - The fair values of our debt and other financing were determined using Level 2 inputs based on indicative market prices.
•
Foreign exchange forward contracts - The fair values of forward contracts were estimated based on quoted forward foreign exchange prices at the reporting date.