Is the word documento the same in Brazilian and European Portuguese?

Yes

The word "documento" is identical in spelling, meaning, and grammatical function in both Brazilian and Continental Portuguese. The only difference lies in pronunciation:

• In Brazilian Portuguese, the vowels are more "open" and clearly articulated. The unstressed "e" in the middle of the word is clearly heard, and the rhythm is more syllable-timed (each syllable carries a more distinct weight).
• In Continental Portuguese, the vowels are much more "closed" or "reduced." The unstressed "e" is often neutralized, becoming almost silent or a very subtle "schwa" sound. The rhythm is more stress-timed, making the word sound shorter and more clipped.

Brazilian Portuguese Examples

1. Eu preciso enviar o documento agora. (I need to send the document now.)
2. Você esqueceu seu documento no escritório. (You forgot your document at the office.)
3. O documento está digitalizado. (The document is scanned.)
4. Por favor, anexe o documento. (Please, attach the document.)
5. Este documento é muito importante. (This document is very important.)

Continental Portuguese Examples

1. Eu preciso de enviar o documento agora. (I need to send the document now.)
2. Esqueceste o teu documento no escritório. (You forgot your document at the office.)
3. O documento está digitalizado. (The document is scanned.)
4. Por favor, anexa o documento. (Please, attach the document.)
5. Este documento é muito importante. (This document is very important.)