@alexf , I found some good detail on the pension plan in the annual report, located here:
https://www.ssmhealth.com/resources/about/financials/reportsDetailed pension info is in item #13.
I see why there was a lawsuit in 2016: the company froze the plan that year. Some senior people are allowed to accumulate benefits through the end of 2020, then switch to a defined contribution plan. Others were switched beginning 2016.
I see a projected benefit obligation at the end of 2019 of $2,468,145,000 and net assets of $1,670,642,000. This leaves an unfunded obligation of $797,503,000, which shows up as a liability in the balance sheet. So, they are 67% funded, as of now. While the numbers have changed, this is consistent with 2018 levels--so, not noticeably changed by the settlement contributions.
It's not unusual, but I also don't like that their pension funds are commingled with their endowment investments. The "so what?" about that is if some investment tanks, then the endowment can't bail out the pensions--they're both SOL. And the company has a number of partnerships and hedge funds invested, which are less liquid that stocks and bonds.
obviously,
@Runrooster will have a better professional opinion. I think in your mom's case, it's a good thing the plan is frozen, as the liability is capped and they can catch up on contributions. But if they settled (i.e. had to be negotiated up to) $15M per year, that's not really going to make a dent on $787M shortfall. And given junior employees were moved out in 2015, these future liabilities won't be so far out in the future.
It's an ongoing, healthy company, but I would say that funding level is a minimal amount--if they were a public company, they would be getting a lot of questions about it. Clearly the lump sum will get your mom less, but the company has also not been prioritizing their pensioners when thinking about their finances.