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FINANCIAL INSTRUMENTS
6 Months Ended
Jun. 30, 2016
Financial Instruments [Abstract]  
Financial Instruments Disclosure [Text Block]
FINANCIAL INSTRUMENTS
Investments
The Corporation's investments in marketable securities include debt securities which are classified as available-for-sale. At June 30, 2016, the Corporation held $2 million in debt securities ($4 million at December 31, 2015), which had contractual maturities of less than 1 year. These securities are recorded at fair value, which approximates cost, and are included in “Other investments” in the consolidated balance sheets and classified as Level 2 measurements. There were $2 million in proceeds from the maturity of marketable securities and $1 million in proceeds from the sale of other investments for the six-month period ended June 30, 2016 (no proceeds for the six-month period ended June 30, 2015).

For securities frequently traded in less active markets, fair value is based on the closing price at the end of the period; where the security is less frequently traded, fair value is based on the price a dealer would pay for the security or similar securities, adjusted for any terms specific to that asset or liability, or by using observable market data points of similar, more liquid securities to imply the price. Market inputs are obtained from well-established and recognized vendors of market data and subjected to tolerance/quality checks.
Long-Term Debt
The Corporation had long-term debt of $477 million in the consolidated balance sheets at June 30, 2016 ($477 million at December 31, 2015). At June 30, 2016, the fair value of this long-term debt was $589 million ($573 million at December 31, 2015) and is classified as a Level 2 measurement. Fair value is determined in a manner similar to the methods described above for investments.
For all other financial instruments, cost approximates fair value or fair value is not readily determinable.