walk away with (someone or an animal)
to lead, take, accompany, or carry someone or an animal away. I walked away with my brother. The young man walked away with the heifer.
walk away with something
and walk off with something 1. Fig. to win something easily. (With little more effort than is required to carry off the winning trophy.) John won the tennis match with no difficulty. He walked away with it. Our team walked away with first place.
2. Fig. to take or steal something. I think somebody just walked off with my purse! Somebody walked off with my daughter's bicycle.