MAC: iCloud and iPhone confused

So I have an iphone 4s and I just got a new iphone 5s, I bought apps using my 4s and had files in them (documents etc, I placed shared on icloud too)… And I'm giving away my 4s to my younger brother

under "icloud" in "settings" there's a "delete account" if I delete the account in my 4s will my purchased apps and documents in iCloud be gone? I have already set up my 5s and my apps and documents appear to be in them but I'm afraid that once I click it the icloud account in my 4s phone, all my files in 5s will go with it

my brother doesn't want any of my old documents left in the 4s.

I'm so confused and scared my files will be forever gone.

BTW: I set up my 5s by back-upping my 4s via itunes

No, I have the same issue. It only deletes them from that device. You'll still have the account. And everything will still be there

Once you've set up the iCloud account in the 5s you could restore the 4s (wiping the data). Either way though I'd download those documents to have a backup just in case.