Yes. It is reasonable to ask for the detailed benefits information before accepting, especially when the summary leaves important items unclear.

Benefits can affect the real value of the offer through health coverage, retirement contributions, paid leave, relocation support and other terms. Asking for documentation is different from trying to negotiate every item.

A concise request works well: explain that you are reviewing the offer and would like the benefits guide or plan summary so you can understand the full package.

Ask recruiting once, professionally, and review the material alongside compensation and start-date terms before you sign. If the benefits guide is not yet available, ask when it will be and whether any material terms differ by office or start class. For more detail, see the guide to choosing between consulting offers.

I'd definitely want the benefits PDF before signing. That's part of the comp package, not a weird ask.