Google wants you to take the Mannheim Pace bus to the Bellwood Metra stop, which is absurd. I'm assuming this is just a glitch, or Google is still waiting for the CTA to load their August schedule.

You will be able to take the Blue Line into the city just fine. The only possible detour, as chgoeditor mentioned, might be some track work being done between stations on the way into the city on the weekend of August 8-10. If that happens, there will be a well-marked transfer to a shuttle bus that will take you to the next station, where you can continue your journey. Should only add 10-15 minutes to your journey.