Graph type showing aggregate id⇒(before, after)?

What's the category of graphs for showing this?

ID | before | after
-------------------
0  | 45.6   | 24.3
-------------------
1  | 1.7    | 89.5
-------------------
⋮  | ⋮      | ⋮

I was thinking something like:

    _______________________________________________________________________________
100|
   |     /^
   |     |
75 |     /
   |     |
   |     |
50 |     |
   |  ^\ |
   |    \/
25 |   / \
   |  |   ^
   |  |
0  |  ^

With colours and different thicknesses it could be a good visual representation…