part and parcel

"Parcel" is used in its archaic sense of "an integral or component part." Originally used as a legal term.

part and parcel (usually uncountable, plural parts and parcels)

1. An integral or essential piece; that which must be done or accepted as part of something else.

   Regular maintenance is part and parcel of owning a car.

   • 1998, Wilhelm Geuder and Miriam Butt, The Projection of Arguments, Introduction

     Argument structure is thus considered to be part and parcel of the information associated with lexical, syntactically atomic verbs.

• come with the territory