What is this thing?

I think it's one of those metalized plastic helium balloons. One with a tail, floating away on the wind. The sun reflecting off it makes it seem larger than it is. And being in de sky makes it hard to get a perspective on the size. It's probably closer than you'd think.

I've seen something like that, believe or not, when at a music festival a small unattended tent that was not properly staked down got caught in the wind and a thermal updraft and went way up in the skt to be blown about. Had I not seen it with my own eyes I would have never believed it was possible.

Bird drone. It forgot its feathers.

You didn't see anything.

Swamp gas.

Was cruising over metro Detroit. was too consistent to be a tent (I've seen some funny video's of those)

Maybe a lower orbit satellite flare?

Edit:

You can take a look here for some satellite trackers. Not sure which one is good enough.

Edit 2: as others pointed out, its very unlikely to be a satellite