2012 Annual Report  The components of other comprehensive income/(loss) (OCI) were as follows:  Dollars in Millions  Pretax Tax  After Tax  Year ended December 31, 2010  Derivatives qualifying as cash flow hedges: (a) Unrealized gains $ 18 $  (3) $  15 Realized gains   (10)  5  (5) Derivatives qualifying as cash flow hedges   8  2  10 Pension and other postretirement benefits:$^{(b)}$  Actuarial losses  (154)  66  (88) Amortization   102  (35)  67 Settlements and curtailments   25  (9)  16 Pension and other postretirement benefits   (27)  22  (5) Available for sale securities, unrealized gains   47  (3)  44 Foreign currency translation   121  -  121 $  149 $  21 $  170 Year ended December 31, 2011 Derivatives qualifying as cash flow hedges: (a) Unrealized gains $ 28 $  (4) $  24 Realized gains   52  (20)  32 Derivatives qualifying as cash flow hedges   80  (24)  56 Pension and other postretirement benefits:$^{(b)}$  Actuarial losses  (1,251)  421  (830) Amortization   115  (34)  81 Settlements and curtailments   11  (4)  7 Pension and other postretirement benefits   (1,125)  383  (742) Available for sale securities, unrealized gains   35  (7)  28 Foreign currency translation   (16)  -  (16) $  (1,026) $   352 $  (674) Year ended December 31, 2012 Derivatives qualifying as cash flow hedges: (a) Unrealized gains $ 26 $  (17) $  9 Realized gains   (56)  20  (36) Derivatives qualifying as cash flow hedges   (30)  3  (27) Pension and other postretirement benefits:$^{(b)}$  Actuarial losses  (432)  121  (311) Amortization   133  (43)  90 Settlements and curtailments   159  (56)  103 Pension and other postretirement benefits   (140)  22  (118) Available for sale securities:  Unrealized gains  20  (8)  12 Realized gains   (11)  2  (9) Available for sale securities$^{(c)}$   9  (6)  3 Foreign currency translation   (15)  -  (15) $  (176) $  19 $  (157) (a) Realized (gains)/losses on derivatives qualifying as effective hedges are recognized in costs of products sold.  (b) See Note 18 “Pension, Postretirement and Postemployment Liabilities” for further detail.  (c) Realized (gains)/losses on available for sale securities are recognized in other (income)/expense.  The accumulated balances related to each component of other comprehensive income/(loss) (OCI), net of taxes, were as follows:  December 31, Dollars in Millions  2012 2011 Derivatives qualifying as cash flow hedges $  9  $ 36  Pension and other postretirement benefits  (3,023) (2,905) Available for sale securities  65  62  Foreign currency translation  (253) (238) Accumulated other comprehensive income/(loss)  $  (3,202) $ (3,045) 57 