http://www.nwa.com/worldperks/earn/a...er.shtml#delta
Elite Qualifying Fare Classes (or codeshare equivalent) on Delta-coded, Delta-operated flights (except where noted)
Elite Qualifying Miles at 150%: P, F, J, C, A, D, I , Y, B
Elite Qualifying Miles at 100%: M, H, Q, K, G, Z, S, X, V, L, U, T
Elite Qualifying Segments: Not applicable on Delta.