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Financial Instruments - (Notes)
9 Months Ended
Sep. 30, 2014
Fair Value Disclosures [Abstract]  
Financial Instruments
NOTE 9. FINANCIAL INSTRUMENTS

Our financial instruments include cash and cash equivalents, accounts receivable, accounts payable, debt and foreign currency forward contracts. Except as described below, the estimated fair value of such financial instruments at September 30, 2014 and December 31, 2013 approximates their carrying value as reflected in our unaudited consolidated condensed balance sheets.

The estimated fair value of total debt at September 30, 2014 and December 31, 2013 was $5,021 million and $4,857 million, respectively, which differs from the carrying amounts of $4,413 million and $4,381 million, respectively, included in our unaudited consolidated condensed balance sheets. The fair value was determined using quoted period-end market prices.