How enormous are these pension fund liabilities? Looking at the balance sheet of GM, their last annual pension fund liability was put at $18B, roughly 10% of t

How enormous are these pension fund liabilities? Looking at the balance sheet of GM, their last annual pension fund liability was put at $18B, roughly 10% of their total liabilities. It doesn't seem much and probably shouldn't factor that highly into comparisons with TSLA, right?