A silver elongated metal-looking oval way up in the sky.

Strange oval object in the sky, September 22, 2018 over Detroit, MI.
I made a turn on a street in Grosse Pointe bordering the city limits of Detroit.  As I turn right, I see the beautiful sky with pink clouds on my left.  I snapped a picture of the clouds and didn’t think more of it.
I looked at the picture again a day later and saw a strange oval object through an opening of the clouds.  If it was closer to the ground, I would guess the Goodyear Blimp. But I’ve seen blimps flying before and this is too high for them to fly.  It also doesn’t look like an airplane with the vapor trails.  I’ve just never seen this before.  It’s like a silver metal elongated “bullet” way up in the sky.