Too many numbers describe the debt figures - very confusing and easily used to mislead. I like to refer to the debt clock for a reasonable
approximation of all the different kinds of debt:
http://www.australiandebtclock.com.au/
Note federal govt debt is 420-some billion so no clue where the just-under 1 trillion figure is coming from. But then, THANKFULLY, I'm NOT an economist!!
Also worth looking at government dept to GDP ratio - a more indicative figure of what constitutes too much debt. Greece over 170% (very bad), US over 100% (bad), Australia ~30% (not bad at all).