There is more IP in there then listed so far....
Both Mobility and Solutions parts have full rights to the IP of old Motorola. What google is getting is a much larger stash of IP then listed so far in the article or comments. I can say that Motorola did not defend its IP properly, and in most cases the higher ups had no idea how many patents were trampled up by competition. Also, keep in mind that Motorola has/had a huge chest of cross-licensed patents. Let's look at some of what is in there (incomplete list, but is a start):
1/ Process technology - Six Sigma, Lean, Process Average Testing - they all have patents and were invented in Motorola. Pretty much all companies out there making high volume electronics are probably infringing one or more Motorola process or manufacturing / testing patents, regardless of the product. Motorola did not want to sue people for using 6 sigma - Google may view things differently, at least where Apple is concerned.
2/ Silicon IP - Freescale and OnSemi may have been independent for a while, but Moto owns the old IP. Not sure if all of SUN's silicon is so far away from Moto's basic patents on memory interface to a CPU, cache coherency, dynamic clock speed changes, etc. to avoid counter-litigation for past infringement. This may help Google in its ongoing dispute with Oracle. Also, there are smaller guys out there who would LOVE to license the rights to make 'HC05, 68K, 'HC08, or 'HC11 / HC12 compatible chips - they are still used in high volume out there and will be for many years to come.
3/ Software - has anybody seen Moto's Java license? Until somebody can say for sure, it is a huge wildcard - it may get Google off the hook with Android as far as Java is concerned, at least for the future. Not to mention a lot of other software (Motorola made and sold its own Unix variant ages ago) which may come it handy...
4/ Basic RF and cell phone patents - Nokia and Moto may have had a cross license, but I would be amazed if Nokia had any rights to sub-license Moto's IP to Apple as part of their settlement. In other words, this alone may get Google home free and force Apple to cross-license.
5/ Satellite technology - Iridium worked, and the same basic technology / IP can be licensed to third parties, if Google is not interested in its own satellite fleet :)
6/ Automotive technology - Moto sold to Continental its automotive division in 2006, but it has IP license rights to all products made up to that point - from MEMS and packaging know-how, to sensors and automotive modules (trans, body, engine, powertrain, telematics). Some guys would be quite interested in that portfolio...