To get extensive help for all kinds of PowerShell operators in the PowerShell 3.0 ISE editor, first list all the different help topics about operators:
You will now see a list similar to this:
(If you do not see this list, you may have to first download PowerShell help. Take a look at Update-Help!)
Next, click in any one of these topics, then press F1. The help window opens and displays detailed help.