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Fair Value Measurements and Financial Instruments
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value Measurements and Financial Instruments Fair Value Measurements and Financial Instruments
Accounting standards establish a three tier fair value hierarchy that prioritizes the inputs used in measuring fair values as follows:
Level 1 — observable inputs such as quoted prices for identical assets in active markets;
Level 2 — inputs other than quoted prices for identical assets in active markets, that are observable either directly or indirectly; and
Level 3 — unobservable inputs in which there is little or no market data which requires the use of valuation techniques and the development of assumptions.
The following methods and assumptions are used to estimate the fair values of the Company’s financial instruments:
Money market funds consist of institutional prime, treasury, and government money market funds. The Company reviews treasury and government money market funds to obtain reasonable assurance that the fund net asset value is $1 per share, and reviews the floating net asset value of institutional prime money market funds for reasonableness. 
Equity investments consist of domestic and international equity securities and equity derivatives valued using the closing stock price on a national securities exchange. Over the counter equity derivatives are valued using observable inputs such as underlying prices of the underlying security and volatility. On a sample basis the Company reviews the listing of Level 1 equity securities in the portfolio and agrees the closing stock prices to a national securities exchange, and independently verifies the observable inputs for Level 2 equity derivatives and securities.
Fixed income investments consist of certain categories of bonds and derivatives. Corporate, government, and agency bonds are valued by pricing vendors who estimate fair value using recently executed transactions and proprietary models based on observable inputs, such as interest rate spreads, yield curves, and credit risk. Asset-backed securities are valued by pricing vendors who estimate fair value using discounted cash flow models utilizing observable inputs based on trade and quote activity of securities with similar features. Fixed income derivatives are valued by pricing vendors using observable inputs such as interest rates and yield curves. The Company obtains an understanding of the models, inputs, and assumptions used in developing prices provided by its vendors through discussions with the fund managers. The Company independently verifies the observable inputs, as well as assesses assumptions used for reasonableness based on relevant market conditions and internal Company guidelines. If an assumption is deemed unreasonable, based on the Company’s guidelines, it is then reviewed by management and the fair value estimate provided by the vendor is adjusted, if deemed appropriate. These adjustments do not occur frequently and historically are not material to the fair value estimates used in the Financial Statements.
Derivatives are carried at fair value, based upon industry standard valuation techniques that use, where possible, current market-based or independently sourced pricing inputs, such as interest rates, currency exchange rates, or implied volatilities.
Debt is carried at outstanding principal balance, less any unamortized issuance costs, discount or premium. Fair value is based on quoted market prices or estimates using discounted cash flow analyses based on current borrowing rates for similar types of borrowing arrangements.
The following tables present the categorization of the Company’s assets and liabilities that are measured at fair value on a recurring basis at September 30, 2019 and December 31, 2018 (in millions):
 
 
 
Fair Value Measurements Using
 
Balance at September 30, 2019
 
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
Assets
 

 
 

 
 

 
 

Money market funds (1)
$
1,851

 
$
1,851

 
$

 
$

Other investments
 

 
 

 
 

 
 

Government bonds
$
1

 
$

 
$
1

 
$

Equity investments
$
1

 
$

 
$
1

 
$

Derivatives (2)
 

 
 

 
 

 
 

Gross foreign exchange contracts
$
12

 
$

 
$
12

 
$

Liabilities
 

 
 

 
 

 
 

Derivatives (2)
 

 
 

 
 

 
 

Gross foreign exchange contracts
$
3

 
$

 
$
3

 
$


 
 
 
Fair Value Measurements Using
 
Balance at December 31, 2018
 
Quoted Prices in Active Markets for Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
Assets
 

 
 

 
 

 
 

Money market funds (1)
$
1,759

 
$
1,759

 
$

 
$

Other investments
 

 
 

 
 

 
 

Government bonds
$
1

 
$

 
$
1

 
$

Equity investments
$
2

 
$

 
$
2

 
$

Derivatives (2)
 

 
 

 
 

 
 

Gross foreign exchange contracts
$
21

 
$

 
$
21

 
$

Liabilities
 

 
 

 
0

 
 

Derivatives (2)
 

 
 

 
 

 
 

Gross foreign exchange contracts
$
12

 
$

 
$
12

 
$

(1)
Included within Fiduciary assets or Short-term investments in the Condensed Consolidated Statements of Financial Position, depending on their nature and initial maturity. 
(2)
Refer to Note 15 “Derivatives and Hedging” for additional information regarding the Company’s derivatives and hedging activity. 
There were no transfers of assets or liabilities between fair value hierarchy levels in either the nine months ended September 30, 2019 or 2018. The Company recognized no realized or unrealized gains or losses in the Condensed Consolidated Statements of Income during either the nine months ended September 30, 2019 or 2018, related to assets and liabilities measured at fair value using unobservable inputs.
The fair value of debt is classified as Level 2 of the fair value hierarchy. The following table provides the carrying value and fair value for the Company’s term debt (in millions):
 
September 30, 2019
 
December 31, 2018
 
Carrying Value
 
Fair Value
 
Carrying Value
 
Fair Value
Current portion of long-term debt
$
599

 
$
617

 
$

 
$

Long-term debt
$
6,120

 
$
6,915

 
$
5,993

 
$
6,159