TM1 Measure Format -

[donap]

I need help understanding this Format on the MEASURE in our TM1 Cube --
b:#,##0.00;(#,##0.00)CO|2|Y

I have not found any explanation for what the different notations mean?
I found one post that said put THIS in as the attribute - but it did not explain what the parts and values do.

We have a need to Change this to display as THOUSANDS now -- And I am not sure what parts of this do  --
what does the Y at the end mean?   What does the CO  and the 2  mean ?  The piping around the 2? 
Thanks