How does mileageplus upgrade refund work?

I recently was on a long flight path from HKG to GRR. The flight path is HKG to LAX, LAX to ORD, ORD to GRR. I had requested mileageplus upgrade for 30k miles + $600.

Since the MileagePlus upgrade applies to the entire trip (in my current itinerary it is HKG to LAX, LAX to ORD, and ORD to GRR), if the upgrade only clears for part of the flight (for example, only ORD to GRR, or HKG to LAX), will United refund the 30,000 miles and $600?