I believe the figure is over a billion extra in interest for every one percent, it might be far worse then that but I dont have the figures to say exactly.
The FED themselves might be the best source for the stats though I would advise people to draw their own conclusions
Over 5 years does not constitute long term imo. USA has one of the shortest average term debt in the world and its been lowered on purpose as this is actually cheaper to finance while rates are able to stay low. The real sudden danger can be that rates have to rise and all the short term debt shifts dangerously into much higher costs. If rates have to rise while the economy is not growing and tax revenue falls its an unstable and positive feedback situation where interest on the debt increases fiscal costs at the same time. (Great cuts required to repay or control debt during a recession is quite unlikely)
Overall this implies great weakness in dollar. I agree in theory the dollar might be laid out in a separated way but also the nature of the problem is likely the path of least resistance, which is that dollar loses a horrible amount of value under pressure
https://www.stlouisfed.org/publications/regional-economist/third-quarter-2018/rising-rates-borrowing-government