So with their ever-changing and ever-worse user interface, there appears to be no way to actually print a reservation with rate details now... only a high level summary of the final price. The 'view reservation' only gives you the location, date, car and total/final price.
If you click on the 'Price Details' it pops up an overlay frame that obscures the rest of the information so you can't actually print everything. Way to go Hertz, keep getting worse!