I have no idea,后面可以直接接从句?

I have no idea,后面可以直接接从句?
I have no idea what you're talking about.
I have no idea貌似是完整的句子,拿what you're talking about是什么从句呢?难道是双宾语?从语法上分析,貌似用I have no idea about what you're talking about好点?