The following presents our total fair value of plan assets including the NAV per share practical expedient for our defined benefit pension plan assets: 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): 144 Total at December 31, 2018 (In millions) Fair value of investments excluding NAV per share practical expedient $ 3,864.1 Fair value of investments using NAV per share practical expedient Debt funds 818.8 Equity funds 420.9 Real estate funds 20.0 Private equity funds 93.5 Total fair value of plan assets $ 5,217.3 Fair value measurements as of December 31, 2017 Total at December 31, 2017 Quoted prices in active markets (Level 1) Significant observable inputs (Level 2) Significant unobservable inputs (Level 3) Cash and cash equivalents Cash $ 299.1 $ 299.1 $ — $ — Trades awaiting settlement 26.4 26.4 — — Bank deposits, short-term bills and notes 41.2 — 41.2 — Debt Government securities 1,873.6 — 1,873.6 — Corporate debt securities 1,515.3 — 1,515.3 — Interest and inflation linked assets 1,248.3 — 1,193.7 54.6 Collateralized debt securities 10.6 — — 10.6 Equities Common stock 697.1 695.9 1.2 — Investment funds Private equity 24.2 — — 24.2 Annuities Buy-in annuities 178.9 — — 178.9 Other Repurchase agreements (1,835.5 ) (1,835.5 ) — — Recoverable taxes 0.5 0.5 — — Venture capital 0.3 — — 0.3 Private equity 200.4 — — 200.4 Total fair value of investments excluding NAV per share practical expedient $ 4,280.4 $ (813.6 ) $ 4,625.0 $ 469.0