Fair Value Hierarchy The following presents our fair value hierarchy for our defined benefit pension plan assets excluding investments using the NAV per share practical expedient (in millions): The following presents our total fair value of plan assets including the NAV per share practical expedient for our defined benefit pension plan assets: 124 Fair value measurements as of December 31, 2020 Total as of December 31, 2020 Quoted prices in active markets (Level 1) Significant observable inputs (Level 2) Significant unobservable inputs (Level 3) Cash and cash equivalents Cash $ 144.6  $ 144.6  $ —  $ —  Trades awaiting settlement 16.7  16.7  —  —  Bank deposits, short-term bills and notes 25.0  —  25.0  —  Debt Government debt securities 869.6  —  869.6  —  Corporate debt securities 112.7  —  112.7  —  Interest and inflation linked assets 1,059.6  —  1,048.6  11.0  Annuities Buy-in annuities 783.9  —  —  783.9  Other Repurchase agreements (483.5) (483.5) —  —  Recoverable taxes 0.2  0.2  —  —  Private equity 61.4  —  —  61.4  Total fair value of investments excluding NAV per share practical expedient $ 2,590.2  $ (322.0) $ 2,055.9  $ 856.3  Total as of December 31, 2020 (In millions) Fair value of investments excluding NAV per share practical expedient $ 2,590.2  Fair value of investments using NAV per share practical expedient Debt funds 1,591.4  Equity funds 1,418.6  Real estate funds 274.4  Private equity funds 77.1  Hedge funds 6.7  Total fair value of plan assets $ 5,958.4 