All I can say is that the company admitted that there would be no cost savings by switching to a DC plan in negotiations, that it would actually require them to lay out more cash now, that over the long term they expected savings.
You have to remember that a properly funded and managed pension generates enough money so that they often require no additional funding from the company. Some workers in the plan die without ever collecting a check. Many dont stay long enough to build up a pension. With a DC plan they bank on people not putting in enough to get the match but if they do the company has to put that money in regardless of how well the market is doing.
Read the book "Retirement Heist" by Ellen Shultz. Its a numbers game, when they changed the accounting rules corporations had to carry the potential liabilities of pensions and retiree benefits on their books. So if they shed the pensions and retiree benefits it looks like they made money, then they can reward themselves with huge bonuses for their performance. Many of todays "troubled pensions" were overfunded but corporations found a way of stealing these funds and dumping stuff in there for the executives to make it look like our pension checks were killing corporate competitiveness. Its a huge scam, one where they are stealing what they promised us and giving it to the executives. Where do you think the money for the outrageous salaries they pay executives are coming from? The shareholders? No, from us.
If AA gets what it wants with the Prefunding they not only get a positive cash windfall of well over $100 million from our matching funds but they also get to write off the liability of providing retiree benefits. So the deal would provide real cash gains plus paper gains.
In reality they arent going after the DB because its better for the long term health of the company , they are going after it for the short term benefit of their pockets.