Invariant spanning double rays in amenable groups

A well-known result of Benjamini, Lyons, Peres, and Schramm states that if G is a finitely generated Cayley graph of a group Γ, then Γ is amenable if and only if G admits a Γ-invariant random spanning tree with at most two ends. We show that this is equivalent to the existence of a Γ-invariant random spanning double ray in a power of G.