The savings are difficult to estimate simply because employees could choose to actually hang onto their money until they retire, and then there's an interest obligation, I believe, on top of that. But, basically, employees were getting one week of pay for every year they worked. To negotiate that away, it's hard to put your finger on. But the unions knew they were giving up something, so they pushed for an increase in pay to get rid of that. So I can't speak to exact dollars.
On November 26th, 2013. See this statement in context.