e) Normal Course Issuer Bid f) Accumulated Comprehensive Income Our normal course issuer bid, which commenced on June 28, 2012, allows us to purchase up to 20 million Class B shares  until June 27, 2013 or an earlier date if we complete such purchases. At December 21, 2012, we had 16.2 million shares  available to repurchase under this bid. Generations 117 (Cdn$ in millions) 2012 2011 Accumulated other comprehensive income – beginning of year  $ 14 $ 45 Currency translation differences: Unrealized gains (losses) on translation of foreign subsidiaries  (195) 103 Foreign exchange differences on debt designated as a hedge of our investment in foreign subsidiaries (net of taxes of $(21) for 2012 and $3 for 2011) 146 (26) (49) 77 Available-for-sale financial assets: Unrealized gains (losses) (net of taxes of $(1) for 2012 and $13 for 2011) 20 (57) Gains reclassified to profit (net of taxes of $3 for 2012 and $(1) for 2011)  (23) (49) (3) (106) Derivatives designated as cash flow hedges: Unrealized gains (net of taxes of $(2) for 2012 and $nil for 2011)  8 7 Gains reclassified to profit on realization (net of taxes of $2 for 2012 and $2 for 2011)  (9) (9) (1) (2) Actuarial loss on retirement benefit plans (net of taxes of $33 for 2012 and $59 for 2011)  (73) (124) Total other comprehensive loss (126) (155) Less actuarial loss on retirement benefit plans recorded in retained earnings  73 124 Accumulated other comprehensive income (loss) – end of year  $ (39) $ 14