MetLife, Inc. Notes to the Consolidated Financial Statements — (Continued) Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Other Postretirement Benefits Fixed Maturity Securities: Corporate Municipals Other (1) Derivative Assets (In millions) Year Ended December 31, 2012: Balance, January 1, .................................................... $ 4 $ 1 $ 5 $ 1 Realized gains (losses) .................................................. — — (2) 2 Unrealized gains (losses) ................................................ — — 2 (2) Purchases, sales, issuances and settlements, net ............................ — — (2) (1) Transfers into and/or out of Level 3 ........................................ — — — — Balance, December 31, ................................................. $ 4 $ 1 $ 3 $— Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Pension Benefits Fixed Maturity Securities: Equity Securities: Corporate Foreign Bonds Other (1) Common Stock - Domestic Other Investments Derivative Assets (In millions) Year Ended December 31, 2011: Balance, January 1, ................................................. $49 $ 4 $2 $240 $471 $— Realized gains (losses) ............................................... — — (1) (59) 85 2 Unrealized gains (losses) ............................................. (4) (1) 1 118 45 4 Purchases, sales, issuances and settlements, net .......................... (13) 2 (1) (93) (70) (2) Transfers into and/or out of Level 3 ..................................... — — 1 — — — Balance, December 31, .............................................. $32 $ 5 $2 $206 $531 $ 4 Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Other Postretirement Benefits Fixed Maturity Securities: Corporate Municipals Other (1) Derivative Assets (In millions) Year Ended December 31, 2011: Balance, January 1, ................................................................... $ 4 $ 1 $ 6 $— Realized gains (losses) ................................................................. — — (1) — Unrealized gains (losses) ................................................................ — — 1 1 Purchases, sales, issuances and settlements, net ............................................ — — (1) — Transfers into and/or out of Level 3 ....................................................... — — — — Balance, December 31, ................................................................ $ 4 $ 1 $ 5 $ 1 Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Pension Benefits Other Postretirement Benefits Fixed Maturity Securities: Equity Securities: Fixed Maturity Securities: Corporate Foreign Bonds Other (1) Common Stock - Domestic Other Investments Corporate Municipals Other (1) (In millions) Year Ended December 31, 2010: Balance, January 1, ............................... $68 $ 5 $69 $241 $373 $— $— $9 Realized gains (losses) ............................. — — (11) — 78 — — (4) Unrealized gains (losses) ........................... 7 1 14 (2) (4) 1 — 1 Purchases, sales, issuances and settlements, net ........ (17) (2) (71) 1 24 — — (1) Transfers into and/or out of Level 3 ................... (9) — 1 — — 3 1 1 Balance, December 31, ............................ $49 $ 4 $ 2 $240 $471 $ 4 $ 1 $ 6 189 MetLife, Inc.