Comcast
The Comcast document is labeled "Comcast Cable Law Enforcement Handbook," and is dated 2007, so there's a possibility that it, too, has been superseded. As with the other documents, it explains how law enforcement agenices can get information, and details what information is available.
There's a great deal of detail in the 35-page document, which describes what Internet, phone, and television information will be turned over. For example, here's the IP information it will make available:
Comcast currently maintains Internet Protocol address log files for a period of 180 days. If Comcast is asked to respond for information relating to an incident that occurred beyond this period, we will not have responsive information and can not fulfill a legal request. (Comcast can process and respond to preservation requests as outlined below in this Handbook.)
As expected, Comcast will also turn over the emails, including attachments, of those who use Comcast's email service, but "In cases involving another entity’s email service or account, Comcast would not have any access to or ability to access customer email in response to a legal request."
Information Comcast turns over to law enforcement agencies varies according to the request. For example, a grand jury subpoena will yield more information than a judicial summons, as you can see in the excerpt below. Comcast notes, though, that this is just a sample, and that "Each request is evaluated and reviewed on a case by case basis in light of any special procedural or legal requirements and applicable laws." so the examples "are for illustration only."