Table of Contents December 31, 2019 (Millions of dollars) Level 1 Level 2 Level 3 Measured at NAV Total Assets at Fair Value U.S. Pension Equity securities: U.S. equities $ 2,578  $ —  $ 23  $ 133  $ 2,734  Non-U.S. equities 2,068  —  —  —  2,068  Fixed income securities: U.S. corporate bonds —  6,577  57  —  6,634  Non-U.S. corporate bonds —  1,414  —  —  1,414  U.S. government bonds —  2,220  —  —  2,220  U.S. governmental agency mortgage-backed securities —  63  —  —  63  Non-U.S. government bonds —  96  —  —  96  Real estate —  —  10  —  10  Cash, short-term instruments and other 230  10  —  515  755  Total U.S. pension assets $ 4,876  $ 10,380  $ 90  $ 648  $ 15,994  December 31, 2020 (Millions of dollars) Level 1 Level 2 Level 3 Measured at NAV Total Assets at Fair Value Non-U.S. Pension Equity securities: U.S. equities $ 97 $ — $ — $ — $ 97 Non-U.S. equities 368 33 — 50 451 Global equities  29 17 — 49 95 Fixed income securities: U.S. corporate bonds — 314 — — 314 Non-U.S. corporate bonds — 987 — — 987 U.S. government bonds — 2 — — 2 Non-U.S. government bonds — 1,743 — — 1,743 Global fixed income  — 131 — 325 456 Real estate — 239 — — 239 Cash, short-term instruments and other  71 276 — — 347 Total non-U.S. pension assets $ 565 $ 3,742 $ — $ 424 $ 4,731 1  1  2  116