I/A Table of Comeau Interest expense decreased slightly in 2013 compared to 2012 due to the de-designation of cash flow hedges. which resulted in the reclassification of S115 million of accumulated losses from other comprehensive income (OCI) into interest expense during 2012. This was substantially offset by increased interest expense related to higher interest rates resulting from debt modifications and amendments. As of December 31, 2014 and 2013. there were no amounts carried in OC1 related to interest rate swaps. Refer to Note 5 "Derivative Financial Instruments" to our audited consolidated financial statements included elsewhere in this prospectus for additional information. Loss on debt extinguishment We incurred a $274 million, S79 million, and S56 million km on tlx extinguishment of debt during the years ended December 31. 2014, 2013, and 2012. respectively. Refer to Note 6 "Borrowings—Debt Repurchase" to our audited consolidated financial statements included elsewhere in this prospectus for more information. Other income (expense) (In muttons) car ended IktemInt 31. 2014 2013 2012 Investment gains and (losses) $ 100 $ 2 $ (s) Derivative financial instruments gains and (losses) (24) (91) Divestitures, net 2 (5) — Non-operating foreign currency gains and (losses) 59 (20) 5 Other income (expense) $ 161 $ (47) $ (94) Investment gains and (losses). Oaths in 2014 relate to the sale of our 30% minority interest in EFS which resulted in a pretax gain of $98 million. The net investment losses in 2012 relate to the impairment of a strategic investment. Derivative financial instruments gains and (losses). The net loss in 2013 was due to fair value adjustments for interest rate swaps and cross currency swaps that are not designated as accounting hedges while the loss in 2012 was driven by fair value adjustments related to interest rate swaps. Non-operating foreign currency gains and (losses). Amounts represent net gains and los