Considering that the offer seems to be familiar and not more lucrative than ordinary separation, I would estimate the target is a 20000 headcount rapid reduction by December. If that's not accomplished this time then I would expect further action until that short-term target is met as early in 2027 as possible. Probably by offering to many who were not included this time.
This is actually pretty drastic, enough to be considered overkill adequate enough to weather economic downturns extending for quite some time, it would be much more foolish to err on the side of inadequate.
After 20000 is hit, I would expect no further cutbacks for well more than a year unless things turn miserably worse faster and steeper than their top people could imagine based on what they know now.