As far as I know, Netflix negotiates those rights independently so it varies per network. They're doing a new-ish model now, though, where Netflix actually pays

As far as I know, Netflix negotiates those rights independently so it varies per network. They're doing a new-ish model now, though, where Netflix actually pays to co-produce content with networks in exchange for getting faster and/or exclusive streaming access. The most high-profile example off the top of my head is the new Michael Jordan doc; they split the cost with ESPN, and Netflix gets next-day international rights and accelerated domestic streaming rights (3 months after broadcast, I think).