is the floating point unit a regular pipeline but is just geared for decimals?
The floating point units are not pipelines in and of themselves, but are rather one of the several execution units in the pipeline.
Here's a diagram from Wikipedia of the Nehalem microarchitecture:
The pipeline is essentially all of the boxes except for the four on the right side. Instructions travel down through the pipeline from top to bottom. The floating-point units are the orange boxes labelled SSE, FP, ADD, MUL, etc.