Saw this article which looks at the debt at LHX
https://finance.yahoo.com/news/l3harris-technologies-nyse-lhx-using-140010130.html
Here's the key takeaway: no, they're not using too much debt, but it is worth keeping an eye on, because servicing that debt will su-k up all the cash...
...unless you can dump a bunch of businesses and rake in some fire sale cash that way (well the article didn't really mention that last part but we all know that's what's going on)