How do I disable background data in Ice Cream Sandwich?

Question

The option for "Background data" used to be under Accounts & sync in Android 2.3. But on my Galaxy Nexus, the option is missing. Therefore some applications are still using background data... How can I disable "Background data" in ICS?

^{(Click image to enlarge)}

Answer 1

Settings / Data Usage / Menu button / Restrict Background Data

^{(Click image to enlarge)}