WHO ARE ACCESSING UR GMAIL ID

Many of us having a habit of sharing passwords..in which an any number of users can login to same
user-id from different places although this is an privacy related issue.. we can see who are accessing our own id from which places using ip address..... in gmail end of the inbox there is an option "ur last activity is from ip address x:x:x:x " near to that there is an option called details... just click on that option....U WILL SEE WHAT ARE THE IPADDRESS UR ACCOUNT IS ACCESSING