I have several charges to my credit card, some every month which I can "guess" what they are, but some I have no idea. There seems to be no where to see what I am actually being billed for. All the billings just say iTunes. But where can I find an itemized explanation of what these items are?
You can see your purchase history in iTunes on a Mac or PC : See your purchase history in the iTunes Store on a Mac or PC - Apple Support
If you just want to use a web browser, go to https://reportaproblem.apple.com/
If there are charges that you still can't explain, it could be other people in your Family Sharing.
If you think someone stole your credit card information and is using it on an Apple ID you don't have access to, you can contact Apple and have them search their system using your credit card number.
Charges without explanation as to what is being billed
