Just how big a miss was Q4? Big...

4Q revenue $18.66 billion, estimate $19.01 billion (range $18.77 billion to $19.28 billion)

4Q earnings per share: $1.12, estimate $1.17.

And Q1 looks uglier:

Sees 1Q revenue about $16 billion, estimate $17.34 billion (range $16.37 billion to $18 billion)

Sees 1Q adjusted EPS about 87c, estimate $1.02 (range 89c to $1.13)