Two tables of content

The package you need is shorttoc:

\documentclass[10pt, a4paper]{report}
\usepackage{shorttoc}

\renewcommand*\contentsname{Contents (detailed)}

\begin{document}

\shorttoc{Contents}{1} % Only sections

\tableofcontents

The important thing is that \shorttoc comes before \tableofcontents; you can specify any depth you want with the second argument.

In case you want to use hyperref, then here's how:

\documentclass[10pt, a4paper]{report}
\usepackage{shorttoc}
\usepackage{hyperref}

\renewcommand*\contentsname{Contents (detailed)}

\begin{document}

\pdfbookmark[1]{Contents}{toc}
\shorttoc{Contents}{1}

\cleardoublepage
\pdfbookmark[1]{Contents (detailed)}{toc (detailed)}
\tableofcontents

Notice that you don't have to specify \shorttoc for the detailed contents, but only \tableofcontents.

Here is another solution.

Replace the first \tableofcontents with

{\expandafter\def\csname @starttoc\endcsname#1{\InputIfFileExists{\jobname.#1}{}{}}%
\tableofcontents}

MWE (with hyperref)

\documentclass{report}

\usepackage{hyperref}

\begin{document}

\setcounter{tocdepth}{1}
\setcounter{secnumdepth}{3}

{\expandafter\def\csname @starttoc\endcsname#1{\InputIfFileExists{\jobname.#1}{}{}}%
\tableofcontents}

\renewcommand*\contentsname{Contents (detailed)}

\setcounter{tocdepth}{3}

\tableofcontents

\chapter{XXX}
\section{YYY}
\subsection{WER}
\subsubsection{ABC}
\subsubsection{DEF}
\subsection{ZTR}
\subsubsection{OIU}
\subsubsection{OIZ}
\subsubsection{POI}
\section{YYY}
\subsection{WER}
\subsubsection{EDC}
\subsubsection{RFV}
\subsection{TGB}
\subsubsection{ZHN}
\subsubsection{OUH}
\subsubsection{WEK}
\chapter{ZZZ}
\chapter{AAA}

\end{document} 

Output: