CALLING?TEXTING?BILLS?ID'S?

ok, well i was wondering when you go online to cheak ur phone bills,usage, ext. does it show the text's, calls, who you called, what you sent, when you called, were, what you sent/texed??????????? i whent on the acont and i could see who i was calling and were the number tracks to. is there anyway i can block that so my parents cant see it. its just privasy is that so bad to ask for?