I have updated the business rule examples which I have provided using XBRL Formula to work with the 2013 US GAAP Taxonomy. You can find these business rules here:
Business users creating SEC XBRL financial filings will eventually realize that these rules are very helpful and will want to use these types of business rules. Understanding how to create these business rules using XBRL Formula is a good skill to have. Understanding what you can and what you cannot do with XBRL Formula is also a good thing to know.